Q42549-8 Micro Tech 600 Amplifier

Micro-Tech 600 Amplifier Service Manual

The Micro-Tech 600 Amplifier is a compact audio power amplifier
designed for professional or commercial use. It provides high power
amplification from 20Hz to 20KHz with minimum distortion and
features balanced inputs with bridged and parallel monophonic
capability.

Product Usage Instructions

To use the Micro-Tech 600 Amplifier, follow these
instructions:

1. Make sure the top and bottom covers are not removed as there
   are no user serviceable parts inside. Refer servicing to qualified
   service personnel.

2. Disconnect the power cord before removing the rear input module
   to access the gain switch.

3. Do not expose the equipment to rain or moisture to reduce the
   risk of electric shock.

4. The Parts Listings include parts specific for the US version
   and the European version (MT-600E13). For parts specific only to
   other versions, contact the Crown Technical Support Group for help
   in finding part numbers.

Technical Support and Warranty Information

If you need special assistance beyond the scope of the manual,
please contact the Crown Technical Support Group at:

• Mailing Address: PO Box 1000 Elkhart IN 46515-1000
• Shipping Address: 57620 C.R. 105 Elkhart IN 46517
• Phone: 219-294-8200 Toll Free: 800-342-6939
• FAX: 219-294-8301

Crown offers a warranty on its products. For more information,
contact the Factory Service Parts Department at the same address
and phone number as the Technical Support Group.

Micro-Tech 600 Amplifier Service Manual

POWER AMPLIFIER
SERVICE MANUAL
MICRO-TECH®-600

©1995 by CROWN INTERNATIONAL, INC.

Mailing Address: P.O. Box 1000 Elkhart, IN U.S.A. 46515-1000

Shipping Address: 57620 C.R. 105
Elkhart, IN U.S.A. 46517

Micro-Tech®, ODEP® and Crown® are registered trademarks of Crown International, Inc.

K-SVCMT6 8-95
1

Micro-Tech 600 Amplifier Service Manual
The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. If you need special assistance beyond the scope of this manual, please contact the Crown Technical Support Group.
Mail: P.O. Box 1000 Elkhart IN 46515-1000 Shipping: 57620 C.R. 105 Elkhart IN 46517
Phone: 800-342-6939/219-294-8200 FAX: 219-294-8301

CAUTION

AVIS

TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM
COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL. DISCONNECT POWER CORD BEFORE REMOVING REAR INPUT MODULE TO ACCESS
GAIN SWITCH.

À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ PAS LES COUVERTURES.
RIEN DES PARTIES UTILES À L’INTÉRIEUR. DÉBRANCHER LA BORNE
AVANT D’OUVRIR LA MODULE EN ARRIÈRE.

WARNING
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE!

2

Micro-Tech 600 Amplifier Service Manual
Table of Contents
Introduction ……………………………………………………. 4 Scope ……………………………………………………………. 4 Warranty ………………………………………………………… 4 Parts Information …………………………………………….. 5 Specifications …………………………………………………. 6 Voltage Conversion …………………………………………. 7 Circuit Theory …………………………………………………. 8 Electrical Checkout Procedures ………………………. 13 Parts List (Non-Module) …………………………………. 17 Module and Schematic Information …………………. 20 Fuse and Display Modules ……………………………… 21 Q42549-8 Output Module ………………………………. 22 Q42647-0 Output Module ………………………………. 23 Q42717-1 Output Module ………………………………. 24 Q42817-6 Output Module ………………………………. 25 Q42968-0 Output Module ………………………………. 26 Q43202-3 Output Module ………………………………. 27 Q42552A0 Main Module ………………………………… 28 Q42713-0 Main Module ………………………………….. 30 Q42776-7 Main Module ………………………………….. 32 Q42983-9 Main Module ………………………………….. 35 Q43038-1 Main Module ………………………………….. 38 Q43033-2 Main Module ………………………………….. 41
3

Micro-Tech 600 Amplifier Service Manual

Introduction

This manual contains service information on Crown power amplifiers. It is designed to be used in conjunction with the applicable Owner’s Manual. However, some important information is duplicated in this Service Manual in case the Owner’s Manual is not readily available.
NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED FOR USE BY AN EXPERIENCED TECHNICIAN ONLY!
SCOPE
This Service Manual in intended to apply to all versions of the MT-600 amplifier including the Amcron MT-601. The Parts Listings include parts specific for the US version and the European version (MT-600E13). For parts specific only to other versions contact the Crown Technical Support Group for help in finding part numbers.
This Service Manual includes several sections. These sections include Parts Information, Specifications, Voltage Conversion, Circuit Theory, Electrical Test Procedures, Non-Module Parts Lists, and Module Parts Lists. Schematics are attached. Note that component parts with circuit board comprise a complete module. Module part numbers are always associated with a specific circuit board, although an unpopulated

circuit board may be built up with different parts to create different modules. Note that Crown does not sell blank (unpopulated) circuit boards.
Each of the compact audio power amplifiers are designed for professional or commercial use. Providing high power amplification from 20Hz to 20KHz with minimum distortion, they feature balanced inputs with bridged and parallel monophonic capability. Specific features vary depending on model family.
WARRANTY
Each Owner’s Manual contains basic policies as related to the customer. In addition it should be stated that this service documentation is meant to be used only by properly trained service personnel. Because most Crown products carry a 3 Year Full Warranty (including round trip shipping within the United States), all warranty service should be referred to the Crown Factory or Authorized Warranty Service Center. See the applicable Owner’s Manual for warranty details. To find the location of the nearest Authorized Service Center or obtain instructions for receiving Crown Factory Service please contact the Crown Technical Support Group (within North America) or your Crown/ Amcron Importer (outside North America).

Crown
Technical Support Group Factory Service Parts Department
Mailing Address: PO Box 1000
Elkhart, IN USA 46515-1000
Shipping Address: 57620 C.R. 105
Elkhart, IN USA 46517
Phone: 219-294-8200 Toll Free: 800-342-6939
FAX: 219-294-8301

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Micro-Tech 600 Amplifier Service Manual

Parts Information

GENERAL INFORMATION
Later sections include both mechanical and electrical parts lists for this product. The parts listed are current as of the date printed. Crown reserves the right to modify and improve its products for the benefit of its customers.
PART NUMBERING SYSTEMS
As of the printing of this manual, Crown is using two numbering systems. The elder system always uses eight characters. The first character is a letter. Common letters used are C, D, H, M, P, and Q. The second through sixth characters are numbers. The numbers build sequentially (for each prefix letter) as new parts are added to our parts inventory system. (In some cases there will be a space then a four character number after the prefix letter; the space is considered a character.) The seventh character is usually a hyphen, though it may be a letter to indicate a revision or special note. The last character is called a check-digit, and is useful to Crown for internal tracking.

shipment on a C.O.D. or pre-payment (check or credit card) basis.
TERM S
Normal terms are pre-paid. Net-30 Days applies to only those firms having pre- established accounts with Crown. If pre-paying, the order must be packed and weighed before a total bill can be established, after which an amount due will be issued and shipment made upon receipt of pre-payment. New parts returned for credit are subject to a 10% re-stocking fee, and authorization from the Crown Parts Department must be obtained before returning parts for credit.
Crown is not a general parts warehouse. Parts sold by the Crown Parts Department are solely for servicing Crown/Amcron products. Part prices and availability are subject to change without notice.

Crown is in the process of converting to a new part number system. Length may vary from eight to twelve characters. There is still a letter prefix, then five numbers. These five numbers identify a type of part. The seventh character is a hyphen. Remaining characters identify the details of the type of part identified by the first part of the number.
STANDARD AND SPECIAL PARTS
Many smaller electrical and electronic parts used by Crown are stocked by and available from electronic supply houses. However, some electronic parts that appear to be standard are actually special. A part ordered from Crown will assure an acceptable replacement. Structural items such as modules and panels are available from Crown only.

Crown
Parts Department
Mailing Address: PO Box 1000
Elkhart, IN USA 46515-1000
Shipping Address: 57620 C.R. 105
Elkhart, IN USA 46517

ORDERING PARTS
When ordering parts, be sure to give the product model, and include a description and part number (CPN/DPN) from the parts listing. Price quotes are available on request.

Phone: 219-294-8210
or: 219-294-8211 Toll Free: 800-342-6939
FAX: 219-294-8301

SHI PM ENT
Shipment will be normally made by UPS or best other method unless you specify otherwise. Shipments are made to and from Elkhart, Indiana USA, only. Established accounts with Crown will receive shipment freight prepaid and will be billed. All others will receive

5

Micro-Tech 600 Amplifier Service Manual

Specifications

Unless noted otherwise, all specifications are based on driving an 8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally 3 years). Because our testing methods are more stringent than our published specifications, every Crown amplifier will exceed its published specifications.
POWER Power 8 Ohm Stereo–235W/Ch 4 Ohm Stereo–325W/Ch 2 Ohm Stereo–400W/Ch 8 Ohm Bridge Mono–655W 4 Ohm Bridge Mono–750W 2 Ohm Parallel Mono–665W 1 Ohm Parallel Mono–700W
Load Impedances: Rated for 16, 8, 4, 2, and 1 (parallel mono only) Ohm operation; safe with all types of loads, even totally reactive loads.
AC Mains: 120VAC at 60 Hz with standard three-wire grounded connector for North American units; 100VAC, 120VAC, 220VAC, and 240VAC at 50 or 60 Hz when equipped with universal transformers, applicable fan assembly, and other applicable hardware with country specific power cord.
PERFORM ANCE Frequency Response: ±0.1dB from 20 Hz to 20 kHz at 1 Watt.
Phase Response: ±10° from 10 Hz to 20 kHz at 1 Watt.
Signal to Noise Ratio: A-weighted, better than 105 dB below full rated output. Better than 100 dB below full rated output from 20 Hz to 20 kHz.
Total Harmonic Distortion (THD): <0.05% from 20 Hz to 1 kHz, increasing linearly to 0.1% at 20 kHz at 500W.
I. M. Distortion: <0.05% from less than 164 milliwatts to 520 W at 26 dB gain.
Slew Rate: >13V per microsecond. (Slew rates are limited to useful levels for ultrasonic/RF protection.)
Damping Factor: >1000 from 10 Hz to 400 Hz.
DC Offset: <10 millivolts.

Input Impedance: Nominally 20K ohms balanced; 10K ohms unbalanced.
Output Impedance: <10 milliohms in series with <2 microhenries.
Protection Systems: Output Device Emulation Protection (ODEP) limits drive in the event of dangerous dynamic thermal conditions without interrupting power. Current limiting for shorted load protection. DC/LF and common mode output current Fault circuitry to mute audio. Delay of 4 seconds from turn on mutes amplifier to prevent dangerous turn-on transients. A high voltage circuit breaker in each main transformer primary and a low voltage power supply fuse in fan primary. Slew rate limiting to prevent RF burn out.
M ECHANI CAL Input Connectors: Balanced 1/4 inch phone jacks. Optional XLR inputs with MT-XLR accessory.
Output Connectors: Color-coded 5-way binding posts on 3/4 inch centers; spaced 3/4 inch apart.
Front Panel Controls: A front panel rocker switch used to power the amplifier on and off.
Back Panel Controls: A three-position switch which selects Stereo, Bridge- Mono, or Parallel-Mono mode. A rotary potentiometer for each channel used to control output level. A ground lift switch used to isolate the phone jack input grounds from the chassis (AC) ground. And a push button circuit breaker for each channel used to protect the power supplies.
Internal Controls: A three-position switch selects 0.775V, 1.4V, or 26 dB voltage gain input sensitivity.
Indicators: Amber Enable indicator shows on/off status of low-voltage power supply. An Amber ODEP indicator for each channel shows the reserve energy status. If no reserve energy is available the indicator will dim in proportion to ODEP limiting.
Construction: Black splatter-coat steel chassis with specially designed flow- through ventilation system.
Mounting: Standard EIA 310 front-panel rack mount with supports for supplemental rear corner mounting.
Dimensions: 19 inches wide, 3.5 inches high, 16 inches deep behind front mounting surface.

Weight: 36 lbs, 4 oz. Shipping; 41 lbs, 2 oz. 6

Micro-Tech 600 Amplifier Service Manual
Voltage Conversion
The 120 Volt 60 Hz version, sold in the United States, is not voltage selectable. It does not have voltage selection boards. This version is to be used only with 120 Volts and only with 60Hz.
All other versions of the Micro Tech 600 use voltage selection boards. The following chart indicates which jumpers are used for different voltages. Note that the fuses and transmotor may need to be changed to accommodate different voltages. Versions with the voltage selection boards may be used at 50 or 60 Hz.

Jumpers
Fuses F100/F200 Transmotor
TF1

VOLTAGE SELECTION BOARD

100V
Z101 Z104 Z106 Z201 Z204 Z206

120V
Z100 Z104 Z105 Z200 Z204 Z205

A10285-23, 7A

200V 220V/230V 240V

Z101 Z103 Z201 Z203

Z101 Z102 Z201 Z202

Z100 Z102 Z200 Z202

A10285-21, 5A

H43068-8 H43407-8

H43061-3

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Micro-Tech 600 Amplifier Service Manual

Theory

OVERVIEW
It should be noted that over time Crown makes improvements and changes to their products for various reasons. This manual is up to date as of the time of writing. For additional information regarding these amplifiers, refer to the applicable Technical Notes provided by Crown for this product.
This section of the manual explains the general operation of a typical Crown power amplifier. Topics covered include Front End, Grounded Bridge, and ODEP. Due to variations in design from vintage to vintage (and similarities with other Crown products) the theory of operation remains simplified.
FEATURES
Micro Tech amplifiers utilize numerous Crown innovations including grounded bridge and ODEP technologies. Cooling techniques make use of the what is essentially air conditioner technology. Air flows bottom to top, and front to side. Air flows a short distance across a wide heatsink. This type of air flow provides significantly better cooling than the “wind tunnel” technology used by many other manufacturers. Output transistors are of the metal can type rather than plastic case. This allows for a significantly higher thermal margin for the given voltage and current ratings. All devices used are tested and graded to ensure maximum reliability. Another electronic technique used is negative feedback. Almost all power amplifiers utilize negative feedback to control gain and provide stability, but Crown uses multiple nested feedback loops for maximum stability and greatly improved damping. Most Crown amplifiers have damping in excess of 1000 in the bass frequency range. This feedback, along with our compensation and ultra-low distortion output topology, make Crown amplifiers superior.
Features specific to the Micro Tech Series’ include two seperate power transformers (one for each channel), a full time full speed fan which also serves as the low voltage transformer, slew rate limiting, and audio muting for delay or protective action. This amplifier can operate in either a Bridged or Parallel Mono mode as well as dual (stereo). A sensitivity switch allows selection of input voltage required for rated output. Level controls are mounted on the rear panel and are of the rotary type. Front panel indicators let the user know the status of the low voltage power supply (enable), and an ODEP indicator for each channel which shows the reserve energy status. In general, the

packaging of this model is designed for maximum watt/price/weight/size value with user friendly features.
For additional details refer to the specification section, or to the applicable Owner’s Manual.
FRONT END OPERATION
The front end is comprised of three stages: Balanced Gain Stage (BGS), Variable Gain Stage (VGS), and the Error Amp. Figure 1 shows a simplified diagram of a typical front end with voltage amplification stages.
Balanced Gain Stage (BGS) Input to the amplifier is balanced. The shield may be isolated from chassis ground by an RC network to interrupt ground loops via the Ground Lift Switch. The non-inverting (hot) side of the balanced input is fed to the non-inverting input of the first op-amp stage. The inverting (negative) side of the balanced input is fed to the inverting input of the first op-amp stage. A potentiometer is provided for common mode rejection adjustment. Electrically, the BGS is at unity gain. (From an audio perspective, however, this stage actually provides +6dB gain if a fully balanced signal is placed on its input.) The BGS is a non-inverting stage. It’s output is delivered to the Variable Gain Stage.
Variable Gain Stage (VGS) From the output of the BGS, the signal goes to the VGS where gain is determined by the position of the Sensitivity Switch, and level is determined by the level control. VGS is an inverting stage with the input being fed to its op-amp stage. Because gain after this stage is fixed at 26dB (factor of 20), greater amplifier sensitivity is achieved by controlling the ratio of feedback to input resistance. The Sensitivity Switch sets the input impedance to this stage and varies the gain such that the overall amplifier gain is 26 dB, or is adjusted appropriately for 0.775V or 1.4V input to attain rated output.
Error Amp The inverted output from the VGS is fed to the noninverting input of the Error Amp op-amp stage through an AC coupling capacitor and input resistor. Amplifier output is fed back via the negative feedback (NFb) loop resistor. The ratio of feedback resistor to input resistor fixes gain from the Error Amp input to the output of the amplifier at 26 dB. Diodes prevent overdriving the Error Amp. Because the Error Amp

8

Micro-Tech 600 Amplifier Service Manual

Theory

amplifies the difference between input and output signals, any difference in the two waveforms will produce a near open loop gain condition which in turn results in high peak output voltage. The output of the Error Amp, called the Error Signal (ES) drives the Voltage Translators.
VOLTAGE AMPLIFICATION
The Voltage Translator stage separates the output of the Error Amp into balanced positive and negative drive voltages for the Last Voltage Amplifiers (LVAs), translating the signal from ground referenced ±15V to ±Vcc reference. LVAs provide the main voltage amplification and drive the High Side output stages. Gain from Voltage Translator input to amplifier output is a factor of 25.2.
Voltage Translators A voltage divider network splits the Error Signal (ES) into positive and negative drive signals for the balanced voltage translator stage. These offset reference voltages drive the input to the Voltage Translator transistors. A nested NFb loop from the output of the amplifier mixes with the inverted signal riding on the offset references. This negative feedback fixes gain at the offset reference points (and the output of the Error Amp) at a factor of -25.2 with respect to the amplifier output. The Voltage Translators are arranged in a common base configuration for non- inverting voltage gain with equal gain. They shift the audio from the ±15V reference to VCC reference. Their outputs drive their respective LVA.
Also tied into the Voltage Translator inputs are ODEP limiting transistors and control/protection transistors.

The ODEP transistors steal drive as dictated by the ODEP circuitry (discussed later). The control/protection transistors act as switches to totally shunt audio to ground during the turn-on delay, or during a DC/LF or Fault protective action.
Last Voltage Amplifiers (LVAs) The Voltage Translator stage channels the signal to the Last Voltage Amplifiers (LVA’s) in a balanced configuration. The

• LVA and -LVA, with their push-pull effect through the Bias Servo, drive the fully complementary output stage. The LVAs are configured as common emitter amplifiers. This configuration provides sufficient voltage gain and inverts the audio. The polarity inversion is necessary to avoid an overall polarity inversion from input jack to output jack, and it allows the NFb loop to control Error Amp gain by feeding back to its non-inverting input (with its polarity opposite to the output of the VGS). With the added voltage swing provided by the LVAs, the signal then gains current amplification through the Darlington emitter-follower output stage.
  GROUNDED BRIDGE TOPOLOGY
  Figure 2 is a simplified example of the grounded bridge output topology. It consists of four quadrants of three deep Darlington (composite) emitter- follower stages per channel: one NPN and one PNP on the High Side of the bridge (driving the load), and one NPN and one PNP on the Low Side of the bridge (controlling the ground reference for the rails). The output stages are biased to operate class AB+B for ultra low distortion in the signal zero- crossing region and high efficiency.

BGS

Audio

Inputs

–

VGS
+ –

Error Amp
+ –

+15V

Voltage +VCC Translators

Voltage Divider

Q100 Q103

Q121 Q101 Q122

Q105

Q102

NPN Outputs (+HS) PNP Outputs (-HS)

Q110

-+
-15V ODEP

Mute NFb Loop

-VCC
LVA’s

Figure 1. Typical Amplifier Front End and Voltage Amplification Stages. 9

Micro-Tech 600 Amplifier Service Manual

Theory

High Side (HS) The High Side (HS) of the bridge operates much like a conventional bipolar push-pull output configuration. As the input drive voltage becomes more positive, the HS NPN conducts and delivers positive voltage to the load. Eventually the NPN devices reach full conduction and +Vcc is across the load. At this time the HS PNP is biased off. When the drive signal is negative going, the HS PNP conducts to deliver -Vcc to the load and the HS NPN stage is off.
The output of the +LVA drives the base of predriver device. Together, the predriver and driver form the first two parts of the three-deep Darlington and are biased class AB. They provide output drive through the bias resistor, bypassing the output devices, at levels below about 100mW. An RLC network between the predriver and driver provide phase shift compensation and limit driver base current to safe levels. Output devices are biased class B, just below cutoff. At about 100mW output they switch on to conduct high current to the load. Together with predriver and driver, the output device provide an overall class AB+B output.
The negative half of the HS is almost identical to the positive half, except that the devices are PNP. One difference is that the PNP bias resistor is slightly greater in value so that PNP output devices run closer

to the cutoff level under static (no signal) conditions. This is because PNP devices require greater drive current.
HS bias is regulated by Q18, the Bias Servo. Q18 is a Vbe multiplier which maintains approximately 3.3V Vce under static conditions. The positive and negative halves of the HS output are in parallel with this 3.3V. With a full base-emitter on voltage drop across predrivers and drivers, the balance of voltage results in approximately .35V drop across the bias resistors in the positive half, and about .5V across the bias resistor in the negative half. Q18 conduction (and thus bias) is adjustable.
A diode string prevents excessive charge build up within the high conduction output devices when off. Flyback diodes shunt back-EMF pulses from reactive loads to the power supply to protect output devices from dangerous reverse voltage levels. An output terminating circuit blocks RF on output lines from entering the amplifier through its output connectors.
Low Side (LS) The Low Side (LS) operates quite differently. The power supply bridge rectifier is not ground referenced, nor is the secondary of the main transformer. In other words, the high voltage power supply floats with respect to ground, but ±Vcc remain constant with

+ –

+Vcc (Positive Rail)

Input signal
HIGH SIDE

Load (speaker)

Inverting Op-amp

-Vcc (Negative Rail)

LOW SIDE

Figure 2. Crown Patented Grounded Bridge Topology 10

Micro-Tech 600 Amplifier Service Manual

Theory

respect to each other. This allows the power supply to deliver +Vcc and -Vcc from the same bridge rectifier and filter as a total difference in potential, regardless of their voltages with respect to ground. The LS uses inverted feedback from the HS output to control the ground reference for the rails (±Vcc). Both LS quadrants are arranged in a three-deep Darlington and are biased AB+B in the same manner as the HS.
When the amplifier output swings positive, the audio is fed to an op-amp stage where it is inverted. This inverted signal is delivered directly to the bases of the positive (NPN) and negative (PNP) LS predrivers. The negative drive forces the LS PNP devices on (NPN off). As the PNP devices conduct, Vce of the PNP Darlington drops. With LS device emitters tied to ground, -Vcc is pulled toward ground reference. Since the power supply is not ground referenced (and the total voltage from +Vcc to -Vcc is constant) +Vcc is forced higher above ground potential. This continues until, at the positive amplifier output peak, -Vcc = 0V and +Vcc equals the total power supply potential with a positive polarity. If, for example, the power supply produced a total of 70Vfrom rail to rail (±35VDC measured from ground with no signal), the amplifier output would reach a positive peak of +70V.
Conversely, during a negative swing of the HS output where HS PNP devices conduct, the op-amp would output a positive voltage forcing LS NPN devices to conduct. This would result in +Vcc swinging toward ground potential and -Vcc further from ground potential. At the negative amplifier output peak, +Vcc = 0V and -Vcc equals the total power supply potential with a negative polarity. Using the same example as above, a 70V supply would allow a negative output peak of 70V. In summary, a power supply which produces a total of 70VDC rail to rail (or ±35VDC statically) is capable of producing 140V peak-to-peak at the amplifier output when the grounded bridge topology is used. The voltage used in this example are relatively close to the voltages of the PB-1/460CSL.
The total effect is to deliver a peak to peak voltage to the speaker load which is twice the voltage produced by the power supply. Benefits include full utilization of the power supply (it conducts current during both halves of the output signal; conventional designs require two power supplies per channel, one positive and one negative), and never exposing any output device to more than half of the peak to peak output voltage (which does occur in conventional designs).

Low side bias is established by a diode string which also shunts built up charges on the output devices. Bias is adjustable via potentiometer. Flyback diodes perform the same function as the HS flybacks. The output of the LS is tied directly to chassis ground via ground strap.
OUTPUT DEVICE EM ULATION PROTECTION (ODEP)
To further protect the output stages, a specially developed ODEP circuit is used. It produces a complex analog output signal. This signal is proportional to the always changing safe-operating-area margin of the output transistors. The ODEP signal controls the Voltage Translator stage by removing drive that may exceed the safe-operating-area of the output stage.
ODEP senses output current by measuring the voltage dropped across LS emitter resistors. LS NPN current (negative amplifier output) and +Vcc are sensed, then multiplied to obtain a signal proportional to output power. Positive and negative ODEP voltages are adjustable via two potentiometers. Across ±ODEP are a PTC and a thermal sense (current source). The PTC is essentially a cutoff switch that causes hard ODEP limiting if heatsink temperature exceeds a safe maximum, regardless of signal level. The thermal sense causes the differential between +ODEP and ­ ODEPto decrease as heatsink temperature increases. An increase in positive output signal output into a load will result in ­ODEP voltage dropping; an increase in negative output voltage and current will cause + ODEP voltage to drop. A complex RC network between the ±ODEP circuitry is used to simulate the thermal barriers between the interior of the output device die (immeasurable by normal means) and the time delay from heat generation at the die until heat dissipates to the thermal sensor. The combined effects of thermal history and instantaneous dynamic power level result in an accurate simulation of the actual thermal condition of the output transistors.

11

Micro-Tech 600 Amplifier Service Manual
Theory

BGS

VGS

BALANCED

-1

INPUTS

ERROR AMP

+VOLTAGE TRANSLATOR
OUTPUT DEVICE EMULATION PROTECTION

+LVA -1

POSITIVE HIGH SIDE
OUTPUT NPN STAGE

HIGH SIDE BIAS
SERVO

-VOLTAGE TRANSLATOR

-LVA -1

NEGATIVE HIGH SIDE
OUTPUT PNP STAGE

MAIN NEGATIVE FEEDBACK (NFb) LOOP

-1
INVERTING BRIDGE BALANCE

LOW SIDE BIAS DIODE
STRING

POSITIVE LOW SIDE OUTPUT NPN STAGE
NEGATIVE LOW SIDE OUTPUT PNP STAGE

Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown)

12

Micro-Tech 600 Amplifier Service Manual

Electrical Checkout Procedures

GENERAL INFORMATION
The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the procedure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order.
All tests assume that AC power is from a regulated 120 VAC source. Test equipment includes an oscilloscope, a DMM, a signal generator, loads, and I.M.D. and T.H.D. noise test equipment.
STANDARD INITIAL CONDITIONS
Level controls fully clockwise. Stereo/Mono switch in Stereo. Sensitivity switch in 26 dB fixed gain position. It is assumed, in each step, that conditions of the amplifier are per these initial conditions unless otherwise specified.
TEST 1: DC OFFSET
Spec: 0 VDC, ±10 mV. Initial Conditions: Controls per standard, inputs shorted. Procedure: Measure DC voltage at the output connectors (rear panel). There is no adjustment for output offset. If spec is not met, there is an electrical malfunction. Slightly out of spec measurement is usually due to U104/U204 out of tolorance.
TEST 2: OUTPUT BIAS ADJUSTMENT
Spec: 300 to 320 mVDC. Initial Conditions: Controls per standard, heatsink temperature less than 40°C. Procedure: Measure DC voltages on the output module across R02, adjust R26 if necessary. Measure DC voltages on the output module across R21, adjust R23 if necessary. Repeat for second channel.

TEST 3: ODEP VOLTAGE ADJUSTMENT
Spec: Bias Per Chart, ±0.1V DC. Initial Conditions: Controls per standard, heatsink at room temperature 20 to 30°C (68 to 86°F). Note: This adjustment should normally be performed within 2 minutes of turn on from ambient (cold) conditions. If possible measure heatsink temperature, if not measure ambient room temperature. Use this information when referencing the following chart. The following is a list of ODEP bias voltages VS. temperature.

°F °C 66 18.9 68 20.0 70 21.1 72 22.2 74 23.3 76 24.4 77 25.0 78 25.6 80 26.7 82 27.8 84 28.9 86 30.0 88 31.1 90 32.2 92 33.3 94 34.4

V­ODEP ­10.31 ­10.26 ­10.20 ­10.14 ­10.09 ­10.03 ­10.00 ­9.97 ­9.91 ­9.86 ­9.80 ­9.74 ­9.69 ­9.63 ­9.57 ­9.51

V+ ODEP 11.41 11.36 11.30 11.24 11.19 11.13 11.10 11.07 11.01 10.96 10.90 10.84 10.79 10.73 10.67 10.61

­ODEP Procedure: Measure pin 6 of U100 and, if
necessary, adjust R121 to obtain V­ODEP as specified above. Measure pin 6 of U200 and, if necessary,
adjust R221 to obtain V­ODEP as specified above. +ODEP Procedure: Measure pin 6 of U103 and, if
necessary, adjust R132 to obtain V+ODEP as specified above. Measure pin 6 of U203 and, if necessary,
adjust R232 to obtain V+ODEP as specified above.

13

Micro-Tech 600 Amplifier Service Manual

Electrical Checkout Procedures

TEST 4: AC POWER DRAW
Spec: 100 Watts maximum quiescent. Initial Conditions: Controls per standard. Procedure: With no input signal and no load, measure AC line wattage draw. If current draw is excessive, check for high AC line voltage or high bias voltage.
TEST 5: COMMON MODE REJECTION
Spec at 100 Hz: ­70 dB. Spec at 20 kHz: ­50 dB. Initial Conditions: Controls per standard. Procedure: No load. Inject a 0 dBu (.775VRMS) 100 Hz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than ­44 dBu (4.9mVRMS). Inject a 0 dBu 20 kHz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than ­24 dBu (49mVRMS). For Main Modules with board numbers lower than D 7993-5 adjust N100 and N200 to calibrate CMR. For Main Modules with board number D 7993-5 or greater adjust R921 and R1021.
TEST 6: VOLTAGE GAIN
Spec 26dB Gain: Gain of 20.0 ±3%. Spec 0. 775V Sensitivity: ±6%. Spec 1. 4V Sensitivity: +12%/­6%. Initial Conditions: Controls per standard. Procedure: No load connected. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 26 dB position. Measure 15.5 VAC ±0.5 VAC at the amplifier output. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 0.775V position. Measure 43.4 VAC ±2.6 VAC at the amplifier output. Inject a 1.4 VAC 1 kHz sine wave with the Sensitivity Switch in the 1.4V position. Measure 43.4 VAC +5.2/­5.6 VAC at the amplifier output. Return the Sensitivity Switch to the 26 dB position.
TEST 7: PHASE RESPONSE
Spec: ±10° from 10 Hz to 20 kHz at 1 Watt. Initial Conditions: Controls per standard, 8 ohm load on each channel. Procedure: Inject a 1 kHz sine wave and adjust for 1 Watt output (2.8 VAC). Check input and output signals against each other, input and output signals must be within 10° of each other.

TEST 8: LEVEL CONTROLS
Spec: Level controlled by level controls. Initial Conditions: Controls per standard. Procedure: No Load. Inject a 1 kHz sine wave. With level controls fully clockwise you should see full gain. As controls are rotated counterclockwise, observe similar gain reduction in each channel. When complete, return level controls to fully clockwise position.
TEST 9: CURRENT LIMIT
Spec: Current Limit at 20 Amps, ±2 Amps Initial Conditions: Controls per standard. Procedure: Load each channel to 1 Ohm. Inject a 1 kHz differentiated (or 10% duty cycle) square wave. See figure 4. Increase output level until current limit occurs. Current limit should occur at 20 ±2 Amps (20 Vpk). Observe clean (no oscillations) current clipping.

In
.047 uF

Out
1K Ohm

Figure 4. Differentiator Circuit
TEST 10: SLEW RATE & 10 KHZ SQUARE WAVE
Spec: 13 – 15 V/µS. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 10 kHz square wave to obtain 52 volts peak- to-peak at each output. Observe the slope of the square wave. It should typically measure 13 to 15 V/µS. Also, the square wave must not include overshoot, ringing, or any type of oscillation.
TEST 11: CROSSTALK
Spec: -60dB at 20 kHz. Initial Conditions: Controls per standard. Terminate input of channel not driven with 600 ohms. Procedure: 8 ohm load on each channel. Inject a 20 kHz sine wave into the Channel 1 input and increase output level to 33 VAC. Measure less than 33 mVAC at the output of Channel 2. Inject a 20 kHz sine wave into the Channel 2 input and increase output level to 33 VAC. Measure less than 33 mVAC at the output of Channel 1.

14

Micro-Tech 600 Amplifier Service Manual

Electrical Checkout Procedures

TEST 12: OUTPUT POWER
Spec at 8 Ohm Stereo: >= 235W at 0.1% THD. Spec at 4 Ohm Stereo: >= 340W at 0.1% THD. Spec at 2 Ohm Stereo: >= 410W at 0.1% THD. International 8 Ohm Stereo: >=220W at 0.1% THD. International 4 Ohm Stereo: >=275W at 0.1% THD. International 2 Ohm Stereo: >=300W at 0.1% THD. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave and measure at least 43.36 VAC at the output of each channel. Load each channel to 4 ohms. Inject a 1 kHz sine wave and measure at least 36.88 VAC. Load each channel to 2 ohms. Inject a 1 kHz sine wave and measure at least 28.64 VAC. All power measurements must be at less than 0.1% THD.

TEST 13: REACTIVE LOADS
Spec: No oscillations. Safe with all types of loads. Initial Conditions: Controls per standard. Procedure Capacitive: Load each channel to 8 ohms in parallel with 2 µF. Inject a 20 kHz sine wave with 33 VAC output for 10 seconds. Procedure Inductive: Load each channel to 8 ohms in parallel with 159 µHenries. Inject a 1 kHz sine wave with 15 VAC output for 10 seconds. Procedure Torture: Load each channel with the primary (red and black leads) of a DC-300A transformer (D 5781-6). Inject a 15 Hz sine wave at sufficient output level to cause 3 to 5 flyback pulses, for 10 seconds. Procedure Short: Inject a 60 Hz sine wave at 15 VAC output. After establishing signal, short the output for 10 seconds.

Figure 5. ODEP Limiting Wave Form
TEST 15: LF PROTECTION
Spec: Amplifier mutes for low frequency. Initial Conditions: Controls per standard. Procedure: No load. Inject a 0.5 Hz 6 volt peak-to-peak square wave, or a 2 Hz 6VAC sine wave into each channel and verify that each channel cycles into mute.

TEST 14: ODEP LIMITING
Spec: No oscillation on ODEP Limiting wave form; either channel controls limiting in Parallel Mono Mode. Initial Conditions: Controls per standard; rag or other obstruction blocking fan so that it does not turn. Procedure: Load the amplifier to 2 ohms on each channel. Inject a 60 Hz sine wave and adjust for 15 Vrms at the output. After a few minutes observe a wave form similar to Figure 5. Remove the input signal from both channels and allow the amplifier to cool for a few minutes. Switch the amplifier to Parallel Mono and remove the load from Channel 1. Inject the signal into Channel 1 and observe that ODEP limiting occurs at the output of both channels. Remove the load from Channel 2, and install the load on Channel 1. Again, observe that both channels limit. Return all amplifier controls to standard initial conditions. Remove the fan obstruction.

TEST 16: SIGNAL TO NOISE RATIO
Spec: 100 dB below rated 8 ohm power 20 Hz to 20 kHz. 105 dB A-Weighted. Initial Conditions: Controls per standard. Short inputs. Procedure: Load each channel to 8 ohms. Measure less than 434 µV at the output of each channel (20 Hz20 kHz bandpass filter).
TEST 17: TURN ON TRANSIENTS
Spec: No dangerous transients. Initial Conditions: Controls per standard. Procedure: From an off condition, turn on the amplifier and monitor the output noise at the time of turn on. Note: Turn on noise may increase significantly if the amplifier is cycled off and on.

15

Micro-Tech 600 Amplifier Service Manual
Electrical Checkout Procedures
TEST 18: TURN OFF TRANSIENTS
Spec: No dangerous transients. Initial Conditions: Controls per standard. Procedure: From an on condition, turn off the amplifier and monitor the output noise at the time of turn off. Note: Turn off noise may increase significantly if the amplifier is cycled off and on.
TEST 19: INTERMODULATION DISTORTION
Spec at 0 dB Output: 0.01%. Spec at ­35 dB Output: 0.05%. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a SMPTE standard IM signal (60 Hz and 7 kHz sine wave mixed at 4:1 ratio). Set the 60 Hz portion of the sine wave to 34.7 Volt RMS. Set the 7 kHz portion to 25%. With an IM analyzer measure less than 0.01% IMD. Repeat test at ­35 dB (reference 34.7 Volt RMS, 60 Hz portion) and measure less than 0.05% IMD.
TEST 20: CLIPPING
Spec: No protective action during test. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave at each input and drive output 6 dB into clip for 10 seconds. The amplifier should not activate any protective circuits (ODEP, Fault, or LF Protection).
POST TESTING
After completion of testing, if all tests are satisfactory, the amplifier controls should be returned to the positions required by customer. If conditions are unknown or unspecified, factory settings are as follows: Level Controls: 9 to 11 O’Clock. Sensitivity Switch: 0.775V U.S., 1.4V International. Stereo/Mono Switch: Stereo. Ground Lift: Lift. Power: Off.
16

Micro-Tech 600 Amplifier Service Manual

Parts List (Non-Module)

SUPPLIMENTAL ITEMS

CPN

ITEM

D 4137-2

Nylon Thumbscrew Washer

C 3342-0

Feet, Black Self-Stick

A10087-71012

10-32 .75 Machine (Rack Screw)

K80603-2

MT Series Owners Manual

QTY 4 4 4 1

POWER SUPPLY
CPN M43534-3 D 8069-4 Q42867-4 Q42866-6 A10285-23 A10285-21 A10285-7 D 6419A0 D 7685-7 D 6301A0 A10087-11028 A10089-11032 A10101-19 H42873-2 H43068-8 H43407-8 H43061-3 D 8439-8 C 9939-7 C 7062-0 C 7015-8 C 8752-5 D 8438-0 A10095-4 A10098-5 C 9870-4 D 6764-1

ITEM MT Fuse Board Assembly (120V, 60Hz Units Only) Fuse Board Insulator Fuse Module, Ch 1 (50-60 Hz Units) Fuse Module, Ch 2 (50-60 Hz Units) 7 Amp Fuse (100-120V Units) 5 Amp Fuse (200-240V Units) .5 Amp Fuse (120V 60Hz Units Only) Power Transformer (120V 60Hz Units Only) Power Transformer (50-60Hz Universal Voltage) Transformer Air Seal Gasket 10-32 x 1.75 Screw for 60Hz power transformer 10-32 x 2 Screw for 50-60Hz power transformer 500OD x 195ID Fiber Washer Transmotor (120V 60Hz Only) Transmotor (100V Units Only) Transmotor (120V 50Hz Only) Transmotor (200-240V Units Only) Fan Bracket Fan Blade 6-32 x 5/16 Flat head Screw 7800µF 90V Capacitor 35 Amp 400V Bridge Rectifier Capacitor Bracket #10 External Star Lockwasher 1/4″ Belleville Spring Washer 10-32 x .38 Screw Shoulder Washer

QTY 1 1 1 1 2 2 1 2 2 2 8 8 4 1 1 1 1 1 1 2 2 2 2 4 4 4 4

OUTPUT ASSEMBLY (ONE PER CHANNEL)

CPN

ITEM

QTY (PER CHANNEL)

C 4751-1

NPN Power Transistor

4

C 6492-0

PNP Power Transistor

4

A 10315-1

6-32 x .56 Hex wshr HD

12

C 7326-9

6 Solder Lug

2

C 9491-9

6-32 x .312 pan head

19

D 7796-2

Sil Pad (between heatsink and chassis)

1

D 7797-0

Pad (between module and chassis)

1

D 8197-2

Paper Shroud

1

C 9387-9

Plasti-Rivit

2

D 8774-8

PTC, 95 Deg. Thermal Sensor

1

F12019-0

Aluminum Heatsink Slug (under diodes on output mod) 1

17

Micro-Tech 600 Amplifier Service Manual

Parts List (Non-Module)

OUTPUT ASSEMBLY (CONT. )

CPN

ITEM

C 8813-5

MPS8097/MPSA18 NPN Transistor (Q318/Q418)

B 5842-8

23 Tubing for Q318/Q418 transistor leads

C 5826-0

LM-234Z-6 Thermal Sense (S100/S200)

B 5464-1

24 Teflon Tubing for S100/S200

C 8573-5

2SA1186 Power Transistor, PNP Driver (TO3P)

C 8574-3

2SC2837 Power Transistor, NPN Driver (TO3P)

M20586-0

PNP Driver Transistor Assembly, TO220 (Old style)

M20587-8

NPN Driver Transistor Assembly, TO220 (Old style)

D 7665-9

Clip, TO3P Mounting

D 7666-7

Bracket, TO3P Heatsink

M21324-5

Aluminum Heatsink with fins

QTY (ONE PER CHANNEL) 1 Order in inches 1 Order in inches 2 2 2 2 2 2 2

BACK PANEL ASSEMBLY

CPN

ITEM

M21208J9

MT Back Panel

F10787J3

Back Panel Cover Plate

D 7074-4

Power Cord (US Version)

A10793-0503B

Power Cord (European Version)

A10214-7

Strain Relief

C 2823-0

Dual Binding Post

D 7600-6

Dual Banana Ground Strap

QTY 1 1 1 1 1 2 1

CHASSIS FRONT ASSEMBLY

CPN

ITEM

C 6487-0

Power Switch, 2 Pole 22 Amp Rocker

D 8052J8

End Cap

A10031-1

8-32 x .060 Flush Captive Nut

A10090-70808

8-32 x .5 Oval Head Screw

F12435J7

Grill, Metal

D 6944-9

Air Filter

A10173-1

Grill Clip

A10101-5

Nylon Washer

A10090-70806

8-32 x .375 Oval Head Screw

M43380-1

Old Filter Housing Assembly (Plastic)

C 6614-9

Rubber Grommets used with old filter assembly

F12263J3

Front Panel Overlay “ODEP”

F10861A5

Old Front Panel Overlay “Supply”

QTY 1 2 4 4 1 1 3 3 3 1 12 1 1

To upgrade the old plastic filter assembly to the new metal style, a kit may be ordered using Crown part number M44077-2. This kit includes a new bottom cover.

MAIN CHASSIS ASSEMBLY

CPN

ITEM

D 8501-5

Cover, Top

D 8548-6

Cover, Bottom

-Note: The old Style bottom cover used with

the plastic grill is no longer available. You may

upgrade to the new style by ordering the kit

M44077-2

QTY 1 1

18

Micro-Tech 600 Amplifier Service Manual

Parts List (Non-Module)

MAIN CHASSIS ASSEMBLY (CONT. )

CPN

ITEM

A10110-70605

Screw, 6-32-.312 Taptite Ph (Covers)

A10086-70806

8-32 x .37 Screw

A10094-3

6 Internal Star Washer

A10094-6

8 Internal Star Washer

A10094-8

10 Internal Star Washer, Zinc

A10099-7

10 Nylonb Shoulder Washer

A10100-16

7/16OD x .203ID Washer

A10102-8

10-32 Hex Nut

A10109-10822

8-18 x 1.375 Pan Head Screw

A10110-70812

8-32 x .750 Taptite Pan Head Screw

A10192-1

.500 Snap Bushing

A11376-6130J

13 inch Black Output Wire

A11376-6235J

23 inch Black Output Wire

A11394-6160E

16 inch Red Output Wire

A11394-6235E

23.5 inch Red Output Wire

C 1811-6

4″ Cable Tie

C 1813-2

7.5″ Cable Tie

C 3163-0

Solder Lug, #6 Hole

C 6709-7

Ferrite Bead

C 6912-7

Tension Retaining Board Support

C 6913-5

1″ Spacer toggle nut, Plastic

C 6914-3

.75″ Spacer toggle nut, Plastic

C 9491-9

6-32 x .312 Pan Head Screw

C 9953-8

2-20 x .312 Pan Head Screw

C10111-0

Button, Mtg

D 7622-0

16.5″ 28AWG Ribbon Cable, 16 Pin

H43424-3

Tube, .75 x 3.5 Slit

H43451-6

Tube, .375 x 3.5

QTY. 20 3 3 4 12 8 8 12 2 2 4 1 1 1 1 4 2 1 4 2 2 2 4 6 2 1 1 1

19

Micro-Tech 600 Amplifier Service Manual

Module and Schematic Information

MODULE HISTORY
The Micro Tech 600 amplifier was introduced in January 1986. Since then there have been several updates and revisions, some of which called for new modules. The following is a list of all modules used up to this date, August 1995.
OUTPUT M ODULES: (left and right are identical)
Q42549-8 Original output module on P10115-7 board. No longer available. Use Q42717-1 as service replacement. Q42647-0 Output module on P10137-1. No longer available. Use Q42717-1 as service replacement. Q42717-1 Output module on P10233-8 board. Q42871-6 Output module on P10305-4 board. Q42968-0 Output module on P10341-9 board. No longer available. Use Q43202-3 as service replacement. Q43202-3 Output module on P10397-1 board.
MAIN MODULES:
Q42552A0 Original main module on D 6304A4 or D 6304B2 board. No longer available. Use Q42776-7 as service replacement. Q42713-0 Main module on D 6910-0 board. No longer available. Use Q42776-7 as service replacement. Q42776-7 Main module on D 7251-8 board. Used as a replacement for all older modules. Q42983-9 Main module on D 7911-7 board. No longer available use Q43033-2 as service replacement. Q43038-1 Main module on D 7993-5 board. No longer available use Q43033-2 as service replacement. Q43033-2 Main module on D 7993-5 board.

FUSE MODULE:
M43534-3 (120V 60Hz U.S. Units Only) Fuse module on P10391-4 board. Q42866-6 -Channel 2 (Universal Volt Units Only) Fuse module on P10296-5 board. Q42867-4 -Channel 1 (Universal Volt Units Only) Fuse module on P10295-7 board.
DISPLAY MODULE:
Q43061-3 (With ODEP Indicators) Display module on D 8030-5 board. M43530-1 (Old style with SUPPLY Indicators) LED Assembly.
SCHEMATIC INFORMATION:
The schematics provided are representative only. There may be slight variations between amplifier to amplifier. These schematics are intended to be used for troubleshooting purposes only.
For amplifiers with main boards D 6304A4, D 6304B2 or D 6910-0 refer to schematic number J0191-7.
For amplifiers with main board D 7251-8 refer to schematic number J0444-0.
For amplifiers with main boards D 7911-7 or D 79935 refer to schematic number J0638-8.

20

Micro-Tech 600 Amplifier Service Manual

Fuse and Display Module Parts Lists

M43534-3 FUSE MODULE

CPN

Item

Qty

C 5060-6

PC Mount Fuse Clip 6

P10391-4

MT Fuse Board

1

Q42866-6 CHANNEL 2 FUSE MODULE

CPN

Item

Qty

A10124-24 #24 Solid Buss Wire 7

C 5060-6

PC Mount Fuse Clip 2

C 7817-7

Faston, Tab .250 PC 6

C 8537-0

6 Pin Socket Header 1

C 8539-6

4 Pin Socket Header 1

P10296-5

Ch 2 Fuse Board

1

Q42867-4 CHANNEL 1 FUSE MODULE

CPN

Item

Qty

A10124-24 #24 Solid Buss Wire 7

C 5060-6

PC Mount Fuse Clip 2

C 8537-0

6 Pin Socket Header 1

C 8539-6

4 Pin Socket Header 1

P10295-7

Ch 1 Fuse Board

1

M43530-1 LED ASSEMBLY “SUPPLY”

CPN

Item

Qty

A10266-6224 6.2K Ohm 2W

5%

C 4342-9

Amber LED

3

C 5868-2

0 Ohm Jumper

1

S 5846-1

Double Side Foam Tape

P10105-8

MT LED Board

1

Q43061-3 ODEP DISPLAY MODULE

CAPACITORS C503 C603 C507 C607 C701 C702

C 6806-1 C 6809-5 C 6802-0 C 6802-0

.01µF 100V 220pF 100V .47µF 50V .47µF 50V

DIODES D701 D702

C 3533-4 C 3533-4

1N966B 16V Zener 1N966B 16V Zener

LED’S

E502 E602 C 4342-9

E701

C 4342-9

Amber #MV5153 Amber #MV5153

RESISTORS R508 R608 R509 R609 R510 R610 R511 R611 R512 R612 R513 R613 R514 R614
R615 R702 R802

A10266-1351 A10266-4751 A10266-4751 A10266-4741 A10266-2221 A10266-1522 A10266-1001 A10266-1522 A10266-5111

1.3M 4.7M 4.7M 470K 2.2K 1.5K .5W 10 1.5K .5W 510

TRANSISTORS Q504 Q604 C 3625-8

2N4125 PNP

IC’S U502

C 5070-5

TL072CP Op Amp

M I SC. U502X Board

C 4508-5 D 8030-5

16 Pin IC Socket MT Display Bd.

21

Micro-Tech 600 Amplifier Service Manual

Q42549-8 Output Module (P10115-7 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09

C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

C 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R02 R03 R04 R06 R07 R09 R10 R11 R12 R13 R14 R16 R17 R19 R20

A10266-7501 C 3299-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 4479-9 A10266-4711 A10266-2R73 A10266-2R73 A10266-7501 A10266-2R73 C 6486-2 C 6486-2 C 6486-2 C 6486-2

.047µF .1µF .1µF .0047µF .001µF .01µF .001µF 220pF 180pF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

R21 R22 R23 R24 R25 R26 R27 R28 R30*

C 3299-2 C 4479-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201*

5.6 .5W 22 250 Pot 13K 2.2K 250 Pot 390 13K 102*

M ISC
Board Jumpers Clips J500 J600

P10115-7 C 5868-2 D 6414-3 C 7057-0

0 Ohm (8) Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

Output Coil 470µH 470µH

MPSA43 MPSA93

75 5.6 .5W .2 5W .2 5W .2 5W .2 5W 22 470 2.7 1W 2.7 1W 75 2.7 1W .2 5W .2 5W .2 5W .2 5W

22

Micro-Tech 600 Amplifier Service Manual

Q42647-0 Output Module (P10137-1 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09

C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

C 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R01 R02 R03 R04 R06 R07 R09 R10 R11 R12 R13 R14 R16 R17 R19

A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-2R73 A10266-7501 A10266-2R73 C 6486-2 C 6486-2 C 6486-2

.047µF .1µF .1µF .0047µF .001µF .01µF .001µF 220pF 180pF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004
Output Coil 470µH 470µH

R20 R21 R22 R23 R24 R25 R26 R27 R28 R30*

C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201*

.2 5W 5.6 FP 22 FP 250 Pot 13K 2.2K 250 Pot 390 13K 102*

M ISC
Board Jumpers Clips J500 J600

P10137-1 C 5868-2 D 6414-3 C 7057-0

0 Ohm (8) Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

MPSA43 MPSA93

75 470 5.6 FP .2 5W .2 5W .2 5W .2 5W 22 FP 470 2.7 1W 2.7 1W 75 2.7 1W .2 5W .2 5W .2 5W

23

Micro-Tech 600 Amplifier Service Manual

Q42717-1 Output Module (P10233-8 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09

C 3978-1 C 3218-2 C 3218-2 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

C 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14 R15

A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2

.047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004
Output Coil 470µH 470µH
MPSA43 MPSA93
75 470 5.6 FP .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 22 FP 470 2.7 1W 12 2W 75 12 2W .2 5W

R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W .2 5W .2 5W 5.6 FP 22 FP 250 Pot 13K 2.2K 250 Pot 390 13K 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

M ISC
Board Jumpers Clips J500 J600

P10233-8 C 5868-2 D 6414-3 C 7057-0

0 Ohm (5) Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

24

Micro-Tech 600 Amplifier Service Manual

Q42871-6 Output Module (P10305-4 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43

C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

C 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14

A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204

.047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004
Output Coil 470µH 470µH
MPSA43 MPSA93
75 470 5.6 FP .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 22 FP 470 2.7 1W 12 2W 75 12 2W

R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 FP 22 FP 250 Pot 13K 2.2K 250 Pot 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

M ISC
Board Jumpers Clips Beads J500 J600

P10305-4 C 5868-2 D 6414-3 C 8341-7 C 7057-0

0 Ohm (7) Q17/Q19 Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

25

Micro-Tech 600 Amplifier Service Manual

Q42968-0 Output Module (P10341-9 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43

C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

D 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14

A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204

.047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004
Output Coil 470µH 470µH
MPSA43/42 MPSA93
75 470 5.6 FP .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 22 FP 470 2.7 1W 12 2W 75 12 2W

R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 FP 22 FP 250 Pot 13K 2.2K 250 Pot 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

M ISC
Board Jumpers Clips J500 J600

P10341-9 C 5868-2 D 6414-3 C 7057-0

0 Ohm (8) Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

26

Micro-Tech 600 Amplifier Service Manual

Q43202-3 Output Module (P10397-1 board) Parts List

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43

C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

INDUCTORS
L00 L01 L02

D 6592-6 C 3510-2 C 3510-2

TRANSISTORS

Q17

C 3810-6

Q19

C 3578-9

RESISTORS
R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14

A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R74 A10266-1204 A10266-7501 A10266-1204

.047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004
Output Coil 470µH 470µH
MPSA43/42 MPSA93
75 470 5.6 FP .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 22 FP 470 2.7 2W 12 2W 75 12 2W

R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 FP 22 FP 250 Pot 13K 2.2K 250 Pot 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

M ISC
Board Jumpers Clips J500 J600

P10397-1 C 5868-2 D 6414-3 C 7057-0

0 Ohm (7) Q17/Q19 10 Pin HDR

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

27

Micro-Tech 600 Amplifier Service Manual

Q42552A0 Main Module (D6304A4/D6304B2 board) Parts List

CAPACITORS
C1 C2 C3 C4 C100 C200 C101 C201 C103 C203 C104 C204 C105 C205 C106 C206 C108 C208 C112 C212 C113 C213 C114 C214 C115 C215 C116 C216 C117 C217 C118 C218 C122 C222 C124 C224 C125 C225 C127 C227 C133 C233 C134 C234 C135 C235 C136 C236 C137 C237 C138 C238 C139 C239 C140 C240 C141 C241 C142 C242

C 4303-1 C 3913-8 C 4303-1 C 6802-0 C 5053-1 C 2821-4 C 6805-3 C 6805-3 C 6950-7 C 6950-7 C 6812-9 C 6803-8 C 6802-0 C 3729-8 C 3729-8 C 6802-0 C 6803-8 C 6812-9 C 6811-1 C 6809-5 C 3729-8 C 3729-8 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 5162-0

DIODES
D1 D2 D3 D4 D5 D6 D7 D104 D204 D105 D205 D106 D206 D107 D207 D108 D208 D109 D209 D110 D210 D111 D211 D112 D212 D113 D213

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2

28

1000uF 470uF 1000uF .47uF 18uF 10pF .022uF .022uF 82pF 82pF 47pF .12uF .47uF 100uF 16V 100uF 16V .47uF .12uF 47pF 100pF 220pF 100uF 16V 100uF 16V 12pF .022uF .022uF 470pF 470pF 12pF 12pF 47pF 47pF 3-12pF Trim
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148

D114 D115 D120 D121 D122 D123

D214 D215 D220 D221 D222 D223

C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2

RESISTOR NETWORKS
N100 N200 D 4669-4 N101 N201 D 6081-0 N102 N202 D 6082-8

TRANSISTORS
Q100 Q200 Q101 Q201 Q102 Q202 Q103 Q203 Q104 Q204 Q105 Q205 Q106 Q206 Q107 Q207 Q108 Q208 Q109 Q209 Q110 Q210 Q111 Q211 Q112 Q212 Q113 Q213 Q115 Q215 Q116 Q216 Q117 Q217 Q118 Q218 Q119 Q219 Q120 Q220

D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8

RESISTORS
R1 R5 R100 R200 R101 R201 R102 R202 R103 R203 R104 R204 R105 R205 R106 R206 R107 R207 R108 R208 R109 R209 R110 R210 R112 R212 R113 R213 R114 R214 R115 R215

A10265-10031 A10266-3321 C 6893-9 A10265-49911 A10266-1021 A10265-10031 A10266-2721 A10266-2721 A10266-1231 A10266-4731 A10266-1021 A10266-8201 A10266-4731 A10266-5131 A10266-4721 A10266-4721 A10266-5141

1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
BAL INPUT RES NET B RES NET C
2N3859A MPSA93 MPSA43/42 PN4250A 2N4125 MPSA93 2N4125 PN4250A 2N3859A 2N3859A MPSA43/42 2N3859A 2N4125 2N4125 MPS8097 PN4250A 2N3859A 2N3859A 2N4125 2N4125
100K 1% 3.3K 5K POT 4.99K 1K 100K 1% 2.7K 2.7K 12K 47K 1K 82 OHM 47K 51K 4.7K 4.7K 510K

Micro-Tech 600 Amplifier Service Manual

Q42552A0 Main Module (D6304A4/D6304B2 board) Parts List Cont.

R116 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R154 R156 R157 R158 R159 R161 R162 R165 R166 R167 R168 R170 R171

R216 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R254 R256 R257 R258 R259 R261 R262 R265 R266 R267 R268 R270 R271

SWITCHES
S3 S100

A10266-3351 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1831 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031 C 5062-2 A10266-2741 A10266-1831 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-1021 A10266-8201 A10266-1541 A10266-1541 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 A10266-1011 A10266-1321 A10266-1321 A10266-9121 A10266-1031 A10266-4701 A10266-4701 A10265-53611 A10265-53611 A10266-1021 A10265-95301 A10266-1021 A10265-95301
C 6841-8 C 6781-6

3.3M 270 OHM 300 OHM 270 OHM 100K TRIM 270K 18K 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K 100K TRIM 270K 18K 100 OHM 6.8K 100 OHM 6.8K 1K 82 OHM 150K 150K 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K 100 OHM 1.3K 1.3K 9.1K 10K 47 OHM 47 OHM 5.36K 1% 5.36K 1% 1K 953 OHM 1K 953 OHM

INTEGRATED CIRCUITS

U1

C 5095-2

U2

C 5096-0

U100 U200 C 6500-0

U103 U203 C 6910-1

U104 U204 C 6900-2

CONNECTORS
J9 J100 J200 J500 J800 J600 J700

C 6871-5 C 6777-4 D 6619-7 D 6620-5

MC7815 MC7915 UPA77 PNP UPA76 NPN MC34084P
6-Pin Conn. Phone Jk. 10″ Ribbon 6″ Ribbon

MOUNTS U1, U2
(2) C 1889-2 6-32 NUT (2) C 2176-3 6-32 X .5 SCREW (2) C 5341-0 HEATSINK (2) C 5594-4 STAR WASHER

MOUNTS U104, U204
(2) C 3450-1 14 PIN SOCKET

COVERS FOR J100, J200
(2) C 6778-2 COVER, PHONE JACK

M ISC
(1) (1) (1) (1)

C 4508-5 16 PIN SOCKET C 5061-4 1N3070 DIODE C 6851-7 5-Position .1 Center Header C 7077-8 3-Conductor Wire Retainer C 6899-6 Wire Posts

BLANK CIRCUIT BOARD
D 6304A4 or D 6304B2

4PDT 6P3T

29

Micro-Tech 600 Amplifier Service Manual

Q42713-0 Main Module (D 6910-0 board) Parts List

CAPACITORS
C1 C2 C3 C4 C5 C6 C100 C200 C101 C201 C103 C203 C104 C204 C105 C205 C106 C206 C108 C208 C112 C212 C113 C213 C114 C214 C115 C215 C116 C216 C117 C217 C118 C218 C122 C222 C123 C223 C124 C224 C125 C225 C127 C227 C128 C228 C130 C230 C133 C233 C134 C234 C135 C235 C136 C236 C137 C237 C138 C238 C139 C239 C140 C240 C141 C241 C144 C244 C145 C245 C146 C246 C147 C247 C148 C248 C149 C249 C152 C252 C153 C253

C 4303-1 C 3913-8 C 4303-1 C 6802-0 C 6806-1 C 6806-1 C 5311-3 C 2820-6 C 6805-3 C 6805-3 C 6812-9 C 6812-9 C 6814-5 C 6803-8 C 6802-0 C 3729-8 C 3729-8 C 6802-0 C 6803-8 C 6814-5 C 6811-1 C 6812-9 C 6812-9 C 3729-8 C 3729-8 C 7706-2 C 6813-7 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 5362-6 C 6814-5 C 6809-5 C 68061 C 6810-3 C 6808-7 C 6809-5 C 5362-6

DIODES
D1 D2 D3 D4 D5

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1

30

1000µF 470µF 1000µF .47µF .01µF .01µF 22µF 5pF .022µF .022µF 47pF 47pF 12pF .12µF .47µF 100µF 16V 100µF 16V .47µF .12µF 12pF 100pF 47pF 47pF 100µF 16V 100µF 16V .1µF 27pF 12pF .022µF .022µF 470pF 470pF 12pF 12pF 47pF 47pF 2.2µF 12pF 220pF .01µF 180pF 470pF 220pF 2.2µF
1N4004 1N4004 1N4004 1N4004 1N4004

D6 D7 D104 D105 D106 D107 D108 D109 D110 D111 D112 D113 D114 D115 D120 D121 D122 D123

D204 D205 D206 D207 D208 D209 D210 D211 D212 D213 D214 D215 D220 D221 D222 D223

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4

RESISTOR NETWORKS
N100 N200 D 4669-4 N101 N201 D 6081-0 N102 N202 D 6082-8

TRANSISTORS
Q100 Q200 Q101 Q201 Q102 Q202 Q103 Q203 Q104 Q204 Q105 Q205 Q106 Q206 Q107 Q207 Q108 Q208 Q109 Q209 Q110 Q210 Q111 Q211 Q112 Q212 Q113 Q213 Q115 Q215 Q116 Q216 Q117 Q217 Q118 Q218 Q119 Q219 Q120 Q220 Q121 Q221

D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 3786-8

RESISTORS
R1 R2 R3 R4

A10265-53621 C 7340-0 C 7340-0 A10265-46421

1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070
BAL INPUT RES NET B RES NET C
2N3859A MPSA93 MPSA43/42 PN4250A 2N4125 MPSA93 2N4125 PN4250A 2N3859A 2N3859A MPSA43/42 2N3859A 2N4125 2N4125 MPS8097 PN4250A 2N3859A 2N3859A 2N4125 2N4125 PN4250A
53.6K 1% 24 24 46.4K 1%

Micro-Tech 600 Amplifier Service Manual

Q42713-0 Main Module (D 6910-0 board) Parts List Cont.

R5 R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R153 R156

R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R253 R256

A10266-3323 C 7409-3 A10265-49911 A10266-1021 A10265-10031 A10266-2721 A10266-2721 A10266-1231 A10266-4731 A10266-1021 A10266-8201 A10266-4731 A10266-1231 A10266-5131 A10266-4721 A10266-4721 A10266-5141 A10266-3351 A10266-4731 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1831 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031 C 5062-2 A10266-2741 A10266-1831 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-1021 A10266-8201 A10266-1541 A10266-1541 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 C 5868-2 A10266-1321

3.3K 1W 5K POT 4.99K 1K 100K 1% 2.7K 2.7K 12K 47K 1K 82 OHM 47K 12K 51K 4.7K 4.7K 510K 3.3M 47K 270 OHM 300 OHM 270 OHM 100K TRIM 270K 18K 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K 100K TRIM 270K 18K 100 OHM 6.8K 100 OHM 6.8K 1K 82 OHM 150K 150K 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K 0 Ohm 1.3K

R157 R158 R159 R161 R162 R165 R166 R167 R168 R170 R171 R174 R175 R176 R177 R178 R179 R180 R181 R182 R183

R257 R258 R259 R261 R262 R265 R266 R267 R268 R270 R271 R274 R275 R276 R277 R278 R279 R280 R281 R282 R283

A10266-1321 A10266-9121 A10266-1031 A10266-4701 A10266-4701 A10265-53611 A10265-53611 A10266-1021 A10265-95301 A10266-1021 A10265-95301 A10265-38311 A10265-24311 A10266-1041 C 5062-2 A10266-1231 A10266-4731 A10266-4711 A10266-4721 C 4479-9 A10266-2051

SWITCHES
S2 S3 S100

C 7325-1 C 7363-2 C 6781-6

INTEGRATED CIRCUITS

U1

C 5095-2

U2

C 5096-0

U100 U200 C 6911-9

U103 U203 C 6910-1

U104 U204 C 6900-2

CONNECTORS
J1 J2 J9 J10 J11 J100 J200 J500 J800 J600 J700

C 7593-4 C 4508-5 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5

M I SC.
(2) (2) (2) (2) (2) (2) (1)

C 1889-2 C 2176-3 C 5341-0 C 5594-4 C 3450-1 C 6778-2 D 6910-0

1.3K 9.1K 10K 47 OHM 47 OHM 5.36K 1% 5.36K 1% 1K 953 OHM 1K 953 OHM 3.83K 2.43K 100K 100K TRIM 12K 47K 470 4.7K 22 2M
DPDT 4PDT 6P3T
MC7815 MC7915 UPA75 PNP UPA76 NPN MC34084P
5-Pin HDR 16 Pin Skt. 6-Pin HDR 4 Pin HDR 3 Pin HDR Phone Jk. 10″ Ribbon 6″ Ribbon
6-32 NUT 6-32 X .5 HEATSINK Star Wash. 14 Pin Sck. Ph Jk Cvr Board
31

Micro-Tech 600 Amplifier Service Manual

Q42776-7 Main Module (D 7251-8 board) Parts List

CAPACITORS
C1 C2 C4 C5 C6 C7 C8 C100 C200 C101 C201 C103 C203 C104 C204 C105 C205 C106 C206 C108 C208 C112 C212 C113 C213 C114 C214 C115 C215 C116 C216 C117 C217 C118 C218 C122 C222 C123 C223 C124 C224 C125 C225 C127 C227 C128 C228 C129 C229 C130 C230 C133 C233 C134 C234 C135 C235 C136 C236 C137 C237 C138 C238 C139 C239 C140 C240 C141 C241 C144 C244 C145 C245 C146 C246 C147 C247 C148 C248 C 149 C249 C150 C250 C151 C251 C152 C252 C153 C253

C 3913-8 C 3913-8 C 6802-0 C 6806-1 C 6806-1 C 6094-9 C 6806-1 C 5311-3 C 2820-6 C 6805-3 C 6804-6 C 6812-9 C 6812-9 C 6814-5 C 6803-8 C 6802-0 C 8026-4 C 8026-4 C 6802-0 C 6803-8 C 6814-5 C 6811-1 C 6812-9 C 6812-9 C 8026-4 C 8026-4 C 7706-2
C 6813-7 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 8026-4 C 6814-5 C 6809-5 C 6806-1 C 6810-3 C 6808-7
C 6809-5 C 6804-6

470µF 470µF .47µF .01µF .01µF 33µF .01µF 22µF 5pF .022µF .1µF 47pF 47pF 12pF .12µF .47µF 100µF 35V 100µF 35V .47µF .12µF 12pF 100pF 47pF 47pF 100µF 35V 100µF 35V .1µF 100V OPEN 27pF 12pF .022µF .022µF 470pF 470pF 12pF 12pF 47pF 47pF 100µF 35V 12pF 220pF .01µF 180pF 470pF OPEN OPEN 220pF .1µF

DIODES
D1 D2 D3 D4 D5 D6 D7 D8 D9 D104 D204 D105 D205 D106 D206 D107 D207 D108 D208 D109 D209 D110 D210 D111 D211 D112 D212 D113 D213 D114 D214 D115 D215 D120 D220 D121 D221 D122 D222 D123 D223 D124 D224

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3549-0 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 5061-4

RESISTOR NETWORKS
N100 N200 D 4669-4 N101 N201 D 6081-0 N102 N202 D 6082-8

TRANSISTORS
Q1 Q2 Q100 Q200 Q101 Q201 Q102 Q202 Q103 Q203 Q104 Q204 Q105 Q205 Q106 Q206 Q107 Q207 Q108 Q208 Q109 Q209 Q110 Q210 Q111 Q211 Q112 Q212 Q113 Q213 Q115 Q215

C 7458-0 C 3625-8 D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5

1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N916B 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070 1N3070
Bal. Input Res. Net-B Res. Net-C
2N4123 2N4125 2N3859A MPSA93 MPSA43/42 PN4250A 2N4125 MPSA93 2N4125 PN4250A 2N3859A 2N3859A MPSA43/42 2N3859A 2N4125 2N4125 MPS8097

32

Micro-Tech 600 Amplifier Service Manual

Q42776-7 Main Module (D 7251-1 board) Parts List Cont.

Q116 Q117 Q118 Q119 Q120 Q121 Q122

Q216 Q217 Q218 Q219 Q220 Q221 Q222

RESISTORS
R1 R2 R3 R4 R5 R10 R11 R12 R13 R14 R15 R100 R200 R101 R201 R102 R202 R103 R203 R104 R204 R105 R205 R106 R206 R107 R207 R108 R208 R109 R209 R110 R210 R111 R211 R112 R212 R113 R213 R114 R214 R115 R215 R116 R216 R117 R217 R118 R218 R119 R219 R120 R220 R121 R221 R122 R222 R123 R223 R124 R224 R125 R225 R126 R226 R127 R227 R128 R228 R129 R229 R130 R230 R131 R231

C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 7458-0 C 7458-0
A10265-53621 A10266-2402 A10266-2402 A10265-46421 A10266-3321
A10266-5621 A10266-4331 A10266-1021 A10266-8221 A10266-6211
A10265-49911 A10266-1021 A10266-1041 A10266-2721 A10266-2721 A10266-1231 A10266-6831 A10266-1021 A10266-8201 A10266-6831 A10266-1231 A10266-5131 A10266-4721 A10266-4721 A10266-5141 A10266-3351 A10266-4731 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1831 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031

PN4250A 2N3859A 2N3859A 2N4125 2N4125 2N4123 2N4123
53.6K 24 OHM 24 OHM 46.4K 3.3K OPEN 5.6K 43K 1K 8.2K 620 OHM OPEN 4.99K 1K 100K 2.7K 2.7K 12K 68K 1K 82 OHM 68K 12K 51K 4.7K 4.7K 510K 3.3M 47K 270 OHM 300 OHM 270 OHM 100K Trim 270K 18K 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K

R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R153 R155 R156 R157 R158 R159 R161 R162 R167 R168 R169 R170 R171 R172 R174 R175 R176 R179 R180 R181 R182 R183 R185 R186 R187

R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R253 R255 R256 R257 R258 R259 R261 R262 R267 R268 R269 R270 R271 R272 R274 R275 R276 R279 R280 R281 R282 R283 R285 R286 R287

SWITCHES
S2 S3 S100

C 5062-2 A10266-2741 A10266-1831 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-1021 A10266-8201 A10266-1541 A10266-1541 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 C 5868-2
A10266-1321 A10266-1321 A10266-9121 A10266-1031 A10266-4701 A10266-4701 A10266-1021 A10265-95301
A10266-1021 A10265-95301
A10265-24921 A10265-14721 A10265-24921 A10266-4731 A10266-4711 A10266-4721 A10266-2201 A10266-2421 A10266-2421 A10266-1051 A10265-52321
C 7325-1 C 7363-2 C 6781-6

100K Trim 270K 18K 100 OHM 6.8K 100 OHM 6.8K 1K 82 OHM 150K 150K 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K ZERO OHM OPEN 1.3K 1.3K 9.1K 10K 47 OHM 47 OHM 1K 953 OHM OPEN 1K 953 OHM OPEN 24.9K 14.7K 24.9K 47K 470 OHM 4.7K 22 OHM 2.4K 2.4K 1M 52.3K
DPDT SIDE DPDT 6P3T

33

Micro-Tech 600 Amplifier Service Manual

Q42776-7 Main Module (D 7251-1 board) Parts List Cont.

INTEGRATED CIRCUITS

U1

C 5095-2

U2

C 5096-0

U100 U200 C 6911-9

U103 U203 C 6910-1

U104 U204 C 6900-2

CONNECTORS
J1 J2 J9 J10 J11 J100 J200 J500 J800 J600 J700

C 7593-4 C 4508-5 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5

M ISC

MOUNTS U1, U2:

(2)

C 1889-2

(2)

C 2176-3

(2)

C 5341-0

(2)

C 5594-4

MOUNTS U104, U204:

(2)

C 3450-1

COVERS FOR J100, J200:

(2)

C 6778-2

STRAIN RELIEF:

(4)

C 1811-6

CIRCUIT BOARD: D 7251-8

MC7815 MC7915 UPA75 PNP UPA76 NPN MC34084P
HDR, 5 PIN 16 PIN Soc HDR, 6 PIN HDR, 4 PIN HDR, 3 PIN PH. JACK 10″ Ribbon 6″ Ribbon
6-32 NUT 6-32 X .5 HEATSINK Star Wash.
14 Pin Skt.
Ph. Jk. Cvr.
Cable Tie

34

Micro-Tech 600 Amplifier Service Manual

Q42983-9 Main Module (D7911-7 board) Parts List

CAPACITORS
C1 C2 C4 C5 C6 C7 C100 C200 C101 C201 C103 C203 C104 C204 C105 C205 C106 C206 C107 C207 C108 C208 C109 C209 C110 C210 C111 C211 C112 C212 C113 C213 C114 C214 C115 C215 C116 C216 C117 C217 C118 C218 C119 C219 C120 C220 C122 C222 C123 C223 C124 C224 C129 C229 C130 C230 C133 C233 C134 C234 C135 C235 C136 C236 C137 C237 C138 C238 C139 C239 C140 C240 C141 C241 C144 C244 C145 C245 C146 C246 C147 C247 C148 C248 C 149 C249 C150 C250 C151 C251 C152 C252 C153 C253 C154 C254

C 4303-1 C 3913-8 C 6802-0 C 6806-1 C 6806-1 C 6804-6 C 5311-3 C 2821-4 C 6805-3 C 6805-3 C 6812-9 C 6812-9 C 6804-6 C 6814-5 C 7417-6 C 5362-6 C 6804-6 C 6803-8 C 6802-0 C 8854-9 C 8854-9 C 6802-0 C 6803-8 C 6814-5 C 6802-0 C 6804-6 C 6811-1 C 6812-9 C 6812-9 C 6814-5 C 6813-7 C 6813-7 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6813-7 C 6813-7 C 6812-9 C 6812-9 C 8576-8 C 6812-9 C 6812-9 C 6806-1 C 6810-3 C 6808-7 C 6806-1 C 6806-1 C 6950-7 C 6804-6 C 8426-6

1000µF 470µF .47µF .01µF .01µF .1µF 22µF 10pF .022µF .022µF 47pF 47pF .1µF 12pF .0033µF 2.2µF .1µF .12µF .47µF 100µF 100µF .47µF .12µF 12pF .47µF .1µF 100pF 47pF 47pF 12pF 27pF 27pF .022µF .022µF 470pF 470pF 27pF 27pF 47pF 47pF 100µF 47pF 47pF .01µF 180pF 470pF .01µF .01µF 82pF .1µF .1µF 250V

C155 C255 C156 C256 C157 C257

C 6804-6 C 6804-6 C 6806-1

DIODES
D1 D2 D3 D4 D5 D6 D7 D108 D208 D109 D209 D110 D210 D111 D211 D112 D212 D113 D213 D120 D220 D121 D221 D122 D222 D123 D223 D124 D224 D125 D225 D126 D226 D127 D227 D128 D228 D129 D229 D130 D230 D131 D231 D132 D232

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 5061-4 C 5061-4 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2

RESISTOR NETWORKS
N100 N200 D 4669-4 N101 N201 D 6081-0 N102 N202 D 6082-8

TRANSISTORS
Q100 Q200 Q101 Q201 Q102 Q202 Q103 Q203 Q105 Q205 Q106 Q206 Q107 Q207 Q108 Q208 Q109 Q209 Q110 Q210 Q112 Q212 Q113 Q213 Q115 Q215 Q116 Q216

D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 C 3625-8 C 3625-8 D 2962-5 C 3786-8

.1µF .1µF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N3070 1N3070 1N3070 1N4148 1N4148 1N4148 1N4148
Bal. Input Res. Net-B Res. Net-C
2N3859A MPSA93 MPSA43/42 PN4250A MPSA93 2N4125 PN4250A 2N3859A 2N3859A MPSA43/42 2N4125 2N4125 MPS8097 PN4250A
35

Micro-Tech 600 Amplifier Service Manual

Q42983-9 Main Module (D7911-7 board) Parts List Cont.

Q117 Q118 Q119 Q120 Q121 Q122 Q123 Q124

Q217 Q218 Q219 Q220 Q221 Q222 Q223 Q224

RESISTORS
R1 R2 R3 R4 R7 R8 R9 R16 R17 R18 R100 R200 R101 R201 R102 R202 R103 R203 R104 R204 R105 R205 R106 R206 R107 R207 R108 R208 R109 R209 R110 R210 R111 R211 R112 R212 R113 R213 R114 R214 R115 R215 R116 R216 R117 R217 R118 R218 R119 R219 R120 R220 R121 R221 R122 R222 R123 R223 R124 R224 R125 R225 R126 R226 R127 R227 R128 R228 R129 R229 R130 R230 R131 R231

D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 7458-0 C 7458-0 C 7458-0 C 3625-8
A10265-53621 A10266-2402 A10266-2402 A10265-46421 A10266-1041 A10266-2031 A10266-5121 A10266-5121 A10266-2031 A10266-1041 C 7409-3 A10265-49911 A10266-5111 A10266-1041 A10266-2721 A10266-2721 A10266-1231 A10266-6831 A10266-8211 A10266-6801 A10266-6831 A10266-1231 A10266-5131 A10266-4721 A10266-4721 A10266-5141 A10266-2751 A10266-4731 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1832 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031

36

2N3859A 2N3859A 2N4125 2N4125 2N4123 2N4123 2N4123 2N4125
53.6K 24 OHM 24 OHM 46.4K 100K 20K 5.1K 5.1K 20K 100K 5K POT 4.99K 510 OHM 100K 2.7K 2.7K 12K 68K 820 OHM 68 OHM 68K 12K 51K 4.7K 4.7K 510K 2.7M 47K 270 OHM 300 OHM 270 OHM 100K Trim 270K 18K .5W 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K

R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 R163 R164 R165 R166 R167 R168 R170 R171 R173 R174 R175 R176 R177 R179 R180 R181 R182 R183 R184 R185 R186 R187

R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R264 R265 R266 R267 R268 R270 R271 R273 R274 R275 R276 R277 R279 R280 R281 R282 R283 R284 R285 R286 R287

C 5062-2 A10266-2741 A10266-1832 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-8211 A10266-6801 A10266-1541 A10266-1541 A10266-1041 A10266-1041 A10266-1851 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 C 5868-2 A10265-12131 A10266-1321 A10266-1321 A10266-1321 A10266-9121 A10266-1021 A10265-10021 A10266-4701 A10266-4701 A10265-12131 A10265-10021 A10265-12131 A10266-1851 A10265-10011 A10265-95301 A10265-10011 A10265-95301 A10265-10021 A10265-24921 A10265-14721 A10265-24921 A10265-54921 A10266-1321 A10266-4711 A10266-4721 A10266-2201 A10266-2421 A10266-4741 A10266-2421 A10266-2751 A10266-3631

100K Trim 270K 18K .5W 100 OHM 6.8K 100 OHM 6.8K 820 68 OHM 150K 150K 100K 100K 1.8M 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K ZERO OHM 121K 1% 1.3K 1.3K 1.3K 9.1K 1K 10K 1% 47 OHM 47 OHM 121K 1% 10K 1% 121K 1% 1.8M 1K 1% 953 OHM 1K 1% 953 OHM 10K 1% 24.9K 1% 14.7K 1% 24.9K 1% 54.9K 1% 1.3K 470 OHM 4.7K 22 OHM 2.4K 470K 2.4K 2.7M 36K

Micro-Tech 600 Amplifier Service Manual

Q42983-9 Main Module (D7911-7 board) Parts List Cont.

R188 R189 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R909 R910 R911 R912 R913 R914 R915 R916

R288 R289 R290 R291 R292 R293 R294 R295 R296 R297 R298 R299 R1009 R1010 R1011 R1012 R1013 R1014 R1015 R1016

A10266-3631 A10266-2731 A10266-2051 A10266-3331 A10266-1031 A10266-1031 A10266-1041 A10266-3021 A10266-4721 A10266-1031 A10266-4721 A10266-1031 A10266-4741 A10266-4741 A10266-1521 A10266-4711 A10266-1051 A10266-1051 A10266-1001 A10266-1001

SWITCHES
S2 S3 S100

C 7325-1 C 7960-5 C 6781-6

INTEGRATED CIRCUITS

U1

C 5095-2

U2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

36K 27K 2M 33K 10K 10K 100K 3K 4.7K 10K 4.7K 10K 470K 470K 1.5K 470 OHM 1M 1M 10 OHM 10 OHM

CONNECTORS
J1 J2 J11 J100 J200 J500 J800 J600 J700

C 7593-4 C 4508-5 C 7526-4 C 6777-4 D 6619-7 D 6620-5

M ISC

MOUNTS U1, U2:

(2)

C 1889-2

(2)

C 2176-3

(2)

C 5341-0

(2)

C 5594-4

IC SOCKETS:

(6)

C 3450-1

COVERS FOR J100, J200:

(2)

C 6778-2

DPDT SIDE DP3T 6P3T

STRAIN RELIEF:

(4)

C 1811-6

CIRCUIT BOARD: D 7911-7

MC7815 MC7915 UPA75 PNP LM339 LM339 UPA76 NPN MC33079P

HDR, 5 PIN 16 PIN Soc HDR, 3 PIN PH. JACK 10″ Ribbon 6″ Ribbon
6-32 NUT 6-32 X .5 HEATSINK Star Wash.
14 Pin Skt.
Ph. Jk. Cvr.
Cable Tie

37

Micro-Tech 600 Amplifier Service Manual

Q43038-1 Main Module (D7993-5 board) Parts List

CAPACITORS

C1

C 4303-1

C2

C 3913-8

C4

C 6802-0

C5

C 6806-1

C6

C 6806-1

C7

C 8897-8

C100 C200 C 5311-3

C101 C201 C 2821-4

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 8897-8

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 8897-8

C112 C212 C 8990-1

C113 C213 C 8991-9

C114 C214 C 8854-9

C115 C215 C 8854-9

C116 C216 C 8991-9

C117 C217 C 8990-1

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 8897-8

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 8897-8

C154 C254 C 8426-6

1000µF 470µF .47µF .01µF .01µF .1µF 22µF 10pF .022µF .022µF 47pF 47pF .1µF 12pF .0033µF 2.2µF .1µF .18µF .47µF 100µF 100µF .47µF .18µF 12pF .47µF .1µF 100pF 47pF 47pF 12pF 27pF 27pF .022µF .022µF 470pF 470pF 27pF 27pF 47pF 47pF 100µF 47pF 47pF .01µF 180pF 470pF .01µF .01µF 82pF 5% .1µF .1µF 250V

C155 C255 C 8897-8 C156 C256 C 8897-8 C157 C257 C 6806-1

DIODES
D1 D2 D3 D4 D5 D6 D7 D108 D208 D109 D209 D110 D210 D111 D211 D112 D212 D113 D213 D120 D220 D121 D221 D122 D222 D123 D223 D124 D224 D125 D225 D126 D226 D127 D227 D128 D228 D129 D229 D130 D230 D131 D231 D132 D232

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 5061-4 C 5061-4 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2

TRANSISTORS
Q100 Q200 D 2961-7 Q101 Q201 C 3578-9 Q102 Q202 C 3810-6 Q103 Q203 C 3786-8 Q105 Q205 C 3578-9 Q106 Q206 C 3625-8 Q107 Q207 C 3786-8 Q108 Q208 D 2961-7 Q109 Q209 D 2961-7 Q110 Q210 C 3810-6 Q112 Q212 C 3625-8 Q113 Q213 C 3625-8 Q115 Q215 D 2962-5 Q116 Q216 C 3786-8 Q117 Q217 D 2961-7 Q118 Q218 D 2961-7 Q119 Q219 C 3625-8 Q120 Q220 C 3625-8 Q121 Q221 C 7458-0

.1µF .1µF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N3070 1N3070 1N3070 1N4148 1N4148 1N4148 1N4148
NPN 2N3859A PNP MPSA93 NPN MPSA43 PNP PN4250 PNP MPSA93 NPN 2N4125 PNP PN4250 NPN 2N3859A NPN 2N3859A NPN MPSA43 NPN 2N4125 NPN 2N4125 NPN MPS8097 PNP PN4250 NPN 2N3859A NPN 2N3859A NPN 2N4125 NPN 2N4125 NPN 2N4123

38

Micro-Tech 600 Amplifier Service Manual

Q43038-1 Main Module (D7993-5 board) Parts List Cont.

Q122 Q222 C 7458-0 Q123 Q223 C 7458-0 Q124 Q224 C 3625-8

NPN 2N4123 NPN 2N4123 NPN 2N4125

RESISTOR NETWORKS
N101 N201 D 7946-3 N102 N202 D 6082-8

Resistor Network Resistor Network

RESISTORS
R1 R2 R3 R4 R7 R8 R9 R16 R17 R18 R100 R200 R101 R201 R102 R202 R103 R203 R104 R204 R105 R205 R106 R206 R107 R207 R108 R208 R109 R209 R110 R210 R111 R211 R112 R212 R113 R213 R114 R214 R115 R215 R116 R216 R117 R217 R118 R218 R119 R219 R120 R220 R121 R221 R122 R222 R123 R223 R124 R224 R125 R225 R126 R226 R127 R227 R128 R228 R129 R229 R130 R230 R131 R231 R132 R232

A10265-53621 53.6K 1%

C 7340-0

24 5W

C 7340-0

24 5W

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

A10266-5121 5.1K

A10266-2031 20K

A10266-1041 100K

C 7409-3

Pot, 5K Linear

A10265-49911 4.99K 1%

A10266-5111 510

A10265-10031 100K 1%

A10266-2721 2.7K

A10266-2721 2.7K

A10266-1231 12K

A10266-6831 68K

A10266-8211 820

A10266-6801 68

A10266-6831 68K

A10266-1231 12K

A10266-5131 51K

A10266-4721 4.7K

A10266-4721 4.7K

A10266-5141 510K

A10266-2751 2.7M

A10266-4731 47K

C 7780-7

270 Flame Proof

A10266-3011 300

C 7780-7

270 Flame Proof

C 5062-2

100K Pot (-ODEP)

A10266-2741 270K

A10266-1832 18K .5W

A10266-6821 6.8K

C 7782-3

100 Flame Proof

C 7782-3

100 Flame Proof

A10266-6821 6.8K

A10266-1031 10K

A10266-1041 100K

A10266-1041 100K

A10266-1031 10K

C 5062-2

100K Pot (+ODEP)

R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 R163 R164 R165 R166 R167 R168 R170 R171 R173 R174 R175 R176 R177 R179 R180 R181 R182 R183 R184 R185 R186 R187

R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R264 R265 R266 R267 R268 R270 R271 R273 R274 R275 R276 R277 R279 R280 R281 R282 R283 R284 R285 R286 R287

A10266-2741 270K

A10266-1832 18K .5W

C 7782-3

100 Flame Proof

A10266-6821 6.8K

C 7782-3

100 Flame Proof

A10266-6821 6.8K

A10266-8211 820

A10266-6801 68

A10266-1541 150K

A10266-1541 150K

A10266-1041 100K

A10266-1041 100K

A10266-1851 1.8M

A10266-1031 10K

C 7781-5

200 .5W Flame Proof

A10266-2721 2.7K

C 7781-5

200 .5W Flame Proof

A10266-2721 2.7K

A10266-1031 10K

A10265-11821 11.8K 1%

JUMPER

JUMPER

C 8261-7

121K 0.1%

A10266-1321 1.3K

A10266-1321 1.3K

A10266-1321 1.3K

A10265-11321 11.3K 1%

A10266-1021 1K

C 8260-9

10K 0.1%

A10266-4701 47

A10266-4701 47

C 8261-7

121K 0.1%

C 8260-9

10K 0.1%

C 8261-7

121K 0.1%

A10266-1851 1.8M

A10265-10011 1K 1%

A10265-97601 976 1%

A10265-10011 1K 1%

A10265-95301 953 1%

C 8260-9

10K 0.1%

A10265-24921 24.9K 1%

A10265-14721 14.7K 1%

A10265-24921 24.9K 1%

A10265-54921 54.9K 1%

A10266-1321 1.3K

A10266-4711 470

A10266-4721 4.7K

A10266-2201 22

A10266-2421 2.4K

A10266-4741 470K

A10266-2421 2.4K

A10266-2751 2.7M

A10266-3631 36K

39

Micro-Tech 600 Amplifier Service Manual

Q43038-1 Main Module (D7993-5 board) Parts List Cont.

R188 R189 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R909 R910 R911 R912 R913 R914 R915 R916 R917 R918 R919 R920 R921

R288 A10266-3631 36K

R289 A10266-2731 27K

R290 A10266-2051 2M

R291 A10266-3331 33K

R292 A10266-1031 10K

R293 A10266-1031 10K

R294 A10266-1041 100K

R295 A10266-3021 3K

R296 A10266-4721 4.7K

R297 A10266-1031 10K

R298 A10266-4721 4.7K

R299 A10266-1031 10K

R1009 A10266-4741 470K

R1010 A10266-4741 470K

R1011 A10266-1521 1.5K

R1012 A10266-4711 470

R1013 A10266-1051 1M

R1014 A10266-1051 1M

R1015 A10266-3901 39

R1016 A10266-3901 39

R1017 A10266-10021 10K

R1018 A10266-10021 10K

R1019 A10266-10021 10K

R1020 A10266-10021 10K

R1021 C 9079-2

200 Pot (CMR Null)

SWITCHES
S2 S3 S4

C 7325-1 C 7960-5 C 6781-6

Ground Switch Sensitivity Stereo/Mono

IC’S
U1 U2 U100 U101 U102 U103 U104

U200 U201 U202 U203 U204

C 5095-2 C 5096-0 C 6911-9 C 4345-2 C 4345-2 C 6910-1 C 7558-7

UA7815 UA7915 UPA75 LM339 LM339 UPA76 MC33079P

M I SC.

Board

D 7993-5

Socket

C 3450-1

Nut

A10102-5

Heatsink

C 5341-0

Torq Spreader C 6541-4

Washer

C 8973-7

Screw

C 9067-7

J1

C 7593-4

J2

C 4508-5

J11

C 7526-4

J100 J200 C 6777-4

Cover

C 6778-2

J500 J800 D 6619-7

J600 J700 D 6620-5

14 Pin Hex 6-32 TO-220

6, Split Stainless 5 Pin Header 16 Pin Socket 3 Pin Header Phone Jack Phone

Jack Cover 10 Inch Ribbon 6 Inch Ribbon

40

Micro-Tech 600 Amplifier Service Manual

Q43033-2 Main Module (D7993-5 board) Parts List

CAPACITORS

C1

C 4303-1

C2

C 3913-8

C4

C 6802-0

C5

C 6806-1

C6

C 6806-1

C7

C 8897-8

C100 C200 C 5311-3

C101 C201 C 9464-6

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 8897-8

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 8897-8

C112 C212 C 8990-1

C113 C213 C 8991-9

C114 C214 C 8854-9

C115 C215 C 8854-9

C116 C216 C 8991-9

C117 C217 C 8990-1

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 8897-8

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 8897-8

C154 C254 C 8426-6

1000µF 470µF .47µF .01µF .01µF .1µF 22µF 10pF .022µF .022µF 47pF 47pF .1µF 12pF .0033µF 2.2µF .1µF .18µF .47µF 100µF 100µF .47µF .18µF 12pF .47µF .1µF 100pF 47pF 47pF 12pF 27pF 27pF .022µF .022µF 470pF 470pF 27pF 27pF 47pF 47pF 100µF 47pF 47pF .01µF 180pF 470pF .01µF .01µF 82pF 5% .1µF .1µF 250V

C155 C255 C 8897-8 C156 C256 C 8897-8 C157 C257 C 6806-1

DIODES
D1 D2 D3 D4 D5 D6 D7 D108 D208 D109 D209 D110 D210 D111 D211 D112 D212 D113 D213 D120 D220 D121 D221 D122 D222 D123 D223 D124 D224 D125 D225 D126 D226 D127 D227 D128 D228 D129 D229 D130 D230 D131 D231 D132 D232

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 5061-4 C 5061-4 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2

TRANSISTORS
Q100 Q200 D 2961-7 Q101 Q201 C 3578-9 Q102 Q202 C 3810-6 Q103 Q203 C 3786-8 Q105 Q205 C 3578-9 Q106 Q206 C 3625-8 Q107 Q207 C 3786-8 Q108 Q208 D 2961-7 Q109 Q209 D 2961-7 Q110 Q210 C 3810-6 Q112 Q212 C 3625-8 Q113 Q213 C 3625-8 Q115 Q215 D 2962-5 Q116 Q216 C 3786-8 Q117 Q217 D 2961-7 Q118 Q218 D 2961-7 Q119 Q219 C 3625-8 Q120 Q220 C 3625-8 Q121 Q221 C 7458-0

.1µF .1µF .01µF
1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N3070 1N3070 1N3070 1N4148 1N4148 1N4148 1N4148
NPN 2N3859A PNP MPSA93 NPN MPSA43 PNP PN4250 PNP MPSA93 NPN 2N4125 PNP PN4250 NPN 2N3859A NPN 2N3859A NPN MPSA43 NPN 2N4125 NPN 2N4125 NPN MPS8097 PNP PN4250 NPN 2N3859A NPN 2N3859A NPN 2N4125 NPN 2N4125 NPN 2N4123

41

Micro-Tech 600 Amplifier Service Manual

Q43033-2 Main Module (D7993-5 board) Parts List Cont.

Q122 Q222 C 7458-0 Q123 Q223 C 7458-0 Q124 Q224 C 3625-8

NPN 2N4123 NPN 2N4123 NPN 2N4125

RESISTOR NETWORKS
N101 N201 D 7946-3 N102 N202 D 6082-8

Resistor Network Resistor Network

RESISTORS
R1 R2 R3 R4 R7 R8 R9 R16 R17 R18 R100 R200 R101 R201 R102 R202 R103 R203 R104 R204 R105 R205 R106 R206 R107 R207 R108 R208 R109 R209 R110 R210 R111 R211 R112 R212 R113 R213 R114 R214 R115 R215 R116 R216 R117 R217 R118 R218 R119 R219 R120 R220 R121 R221 R122 R222 R123 R223 R124 R224 R125 R225 R126 R226 R127 R227 R128 R228 R129 R229 R130 R230 R131 R231 R132 R232

A10265-53621 53.6K 1%

C 7340-0

24 5W

C 7340-0

24 5W

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

A10266-5121 5.1K

A10266-2031 20K

A10266-1041 100K

C 7409-3

Pot, 5K Linear

A10265-49911 4.99K 1%

A10266-5111 510

A10265-10031 100K 1%

A10266-2721 2.7K

A10266-2721 2.7K

A10266-1231 12K

A10266-6831 68K

A10266-8211 820

A10266-6801 68

A10266-6831 68K

A10266-1231 12K

A10266-5131 51K

A10266-4721 4.7K

A10266-4721 4.7K

A10266-5141 510K

A10266-2751 2.7M

A10266-4731 47K

C 7780-7

270 Flame Proof

A10266-3011 300

C 7780-7

270 Flame Proof

C 5062-2

100K Pot (-ODEP)

A10266-2741 270K

A10266-1832 18K .5W

A10266-6821 6.8K

C 7782-3

100 Flame Proof

C 7782-3

100 Flame Proof

A10266-6821 6.8K

A10266-1031 10K

A10266-1041 100K

A10266-1041 100K

A10266-1031 10K

C 5062-2

100K Pot (+ODEP)

R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 R163 R164 R165 R166 R167 R168 R170 R171 R173 R174 R175 R176 R177 R179 R180 R181 R182 R183 R184 R185 R186 R187

R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R264 R265 R266 R267 R268 R270 R271 R273 R274 R275 R276 R277 R279 R280 R281 R282 R283 R284 R285 R286 R287

A10266-2741 270K

A10266-1832 18K .5W

C 7782-3

100 Flame Proof

A10266-6821 6.8K

C 7782-3

100 Flame Proof

A10266-6821 6.8K

A10266-8211 820

A10266-6801 68

A10266-1541 150K

A10266-1541 150K

A10266-1041 100K

A10266-1041 100K

A10266-1851 1.8M

A10266-1031 10K

C 7781-5

200 .5W Flame Proof

A10266-2721 2.7K

C 7781-5

200 .5W Flame Proof

A10266-2721 2.7K

A10266-1031 10K

A10265-11821 11.8K 1%

JUMPER

JUMPER

C 8261-7

121K 0.1%

A10266-1321 1.3K

A10266-1321 1.3K

A10266-1321 1.3K

A10265-11321 11.3K 1%

A10266-1021 1K

C 8260-9

10K 0.1%

A10266-4701 47

A10266-4701 47

C 8261-7

121K 0.1%

C 8260-9

10K 0.1%

C 8261-7

121K 0.1%

A10266-1851 1.8M

A10265-10011 1K 1%

A10265-97601 976 1%

A10265-10011 1K 1%

A10265-95301 953 1%

C 8260-9

10K 0.1%

A10265-24921 24.9K 1%

A10265-13721 13.7K 1%

A10265-24921 24.9K 1%

A10265-54921 54.9K 1%

A10266-1321 1.3K

A10266-4711 470

A10266-4721 4.7K

A10266-2201 22

A10266-2421 2.4K

A10266-4741 470K

A10266-2421 2.4K

A10266-2751 2.7M

A10266-3631 36K

42

Micro-Tech 600 Amplifier Service Manual

Q43033-2 Main Module (D7993-5 board) Parts List Cont.

R188 R189 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R909 R910 R911 R912 R913 R914 R915 R916 R917 R918 R919 R920 R921

R288 A10266-3631 36K

R289 A10266-2731 27K

R290 A10266-2051 2M

R291 A10266-3331 33K

R292 A10266-1031 10K

R293 A10266-1031 10K

R294 A10266-1041 100K

R295 A10266-3021 3K

R296 A10266-4721 4.7K

R297 A10266-1031 10K

R298 A10266-4721 4.7K

R299 A10266-1031 10K

R1009 A10266-4741 470K

R1010 A10266-4741 470K

R1011 A10266-1521 1.5K

R1012 A10266-4711 470

R1013 A10266-1051 1M

R1014 A10266-1051 1M

R1015 A10266-3901 39

R1016 A10266-3901 39

R1017 A10266-10021 10K

R1018 A10266-10021 10K

R1019 A10266-10021 10K

R1020 A10266-10021 10K

R1021 C 9079-2

200 Pot (CMR Null)

SWITCHES
S2 S3 S4

C 7325-1 C 7960-5 C 6781-6

Ground Switch Sensitivity Stereo/Mono

IC’S
U1 U2 U100 U101 U102 U103 U104

U200 U201 U202 U203 U204

C 5095-2 C 5096-0 C 6911-9 C 4345-2 C 4345-2 C 6910-1 C 7558-7

UA7815 UA7915 UPA75 LM339 LM339 UPA76 MC33079P

M I SC.

Board

D 7993-5

Socket

C 3450-1

Nut

A10102-5

Heatsink

C 5341-0

Torq Spreader C 6541-4

Washer

C 8973-7

Screw

C 9067-7

J1

C 7593-4

J2

C 4508-5

J11

C 7526-4

J100 J200 C 6777-4

Cover

C 6778-2

J500 J800 D 6619-7

J600 J700 D 6620-5

14 Pin Hex 6-32 TO-220

6, Split Stainless 5 Pin Header 16 Pin Socket 3 Pin Header Phone Jack Phone

Jack Cover 10 Inch Ribbon 6 Inch Ribbon

43

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