Hafler 9180 Power Amplifier Instruction Manual
- June 13, 2024
- Hafler
Table of Contents
9180 Power Amplifier
Product Information
Product Name: Series 9180/9270 Power
Amplifier
Manufacturer: Hafler
Website: https://manual-hub.com/
Product Usage Instructions
| Instruction | Description |
|---|---|
| 1. READ INSTRUCTIONS | All the safety and operating instructions of your |
Hafler
equipment should be read before power is applied to the
equipment.
2. RETAIN OWNERS MANUAL| These safety and operating instructions should be
retained for
future reference.
3. HEED WARNINGS| All warnings on the equipment and in the operating
instructions
are important and should be followed.
4. FOLLOW INSTRUCTIONS| All operating and use instructions are important and
should be
followed.
5. HEAT| The equipment should be kept away from areas of high
temperature, such as heater vents, radiators, stoves/ovens,
fireplaces, etc.
6. VENTILATION| The equipment should be used in an area suitable for proper
ventilation. Care should be taken not to impede airflow in and
around the cabinet. Do not mount on a carpeted shelf or in a sealed
enclosure. Allow for proper clearance above the equipment.
7. WATER AND MOISTURE| The equipment should not be used in or around water,
such as a
bathtub, sink, or swimming area. Also, the equipment should not be
used in areas prone to flooding, such as a basement.
a. POWER SOURCES| The equipment should be connected only to a power source of
the
same voltage and frequency as that listed on the rear panel above
the power cord entry point.
9. POWER CORD PROTECTION| Power cords should be arranged so that they do not
interfere
with the movement of objects in the room: people, fan blades,
utility carts, etc. Also, care should be taken that the cord is not
pinched or cut, and placed so that it is not in danger of being
pinched or cut, as in under a rug, around a tight corner, etc.
11. NON-USE PERIODS| During periods of extended non-use, the power cord
should be
unplugged from the power source.
12. CLEANING| The equipment should be cleaned only as detailed in the
operating instructions.
13. OBJECT AND LIQUID ENTRY| Care should be taken so that objects and/or
liquids, such as
cleaning fluids or beverages, are not spilled into the enclosure of
the equipment.
14. DAMAGE REQUIRING SERVICE| Hafler equipment should be serviced by
qualified service
personnel when: A. The power supply cord or plug has been damaged,
or B. Objects have fallen, or liquid has been spilled into the
equipment, or C. The equipment has been exposed to rain, or D. The
equipment does not appear to operate normally or exhibits a marked
change in performance, or E. The equipment has been dropped, or the
enclosure has been damaged.
15. SERVICING| The user should not attempt to service the equipment beyond
that which is described in the operating instructions. All other
service should be referred to qualified service personnel.
Series 9180/ 9270 Power Amplifier
NOTICE – IMPORTANT SAFETY INFORMATION
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
The lightning flash with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of uninsulated “dangerous voltage”
within the products enclosure, that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
1 . READ INSTRUCTIONS All the safety and operating instructions of your Hafler
equipment should be read before power is applied to the equipment.
2 . RETAIN OWNERS MANUAL These safety and operating instructions should be
retained for future reference.
3 . HEED WARNINGS All warnings on the equipment and in the operating
instructions are important and should be followed.
4 . FOLLOW INSTRUCTIONS All operating and use instructions are important and
should be followed.
5. HEAT The equipment should be kept away from areas of high temperature,
such as heater vents, radiators, stoves/ovens, fireplaces, etc.
6 . VENTILATION The equipment should be used in an area suitable for proper
ventilation. Care should be taken not to impede airflow in and around the
cabinet. Do not mount on a carpeted shelf or in a sealed enclosure. Allow for
proper clearance above the equipment.
7 . WATER AND MOISTURE The equipment should not be used in or around water,
such as a bathtub, sink, or swimming area. Also, the equipment should not be
used in areas prone to flooding, such as a basement.
a . POWER SOURCES
The equipment should be connected only to a power source of the same voltage
and frequency as that listed on the rear panel above the power cord entry
point.
9 . POWER CORD PROTECTION Power cords should be arranged so that they do not
interfere with the movement of objects in the room: people, fan blades,
utility carts, etc. Also, care should be taken that the cord is not pinched or
cut, and placed so that it is not in danger of being pinched or cut, as in
under a rug, around a tight corner, etc.
10. POWER CORD GROUNDING The power supply cord is of a three wire grounded
type, designed to reduce the risk of electric shock sustained from a live
cabinet. It is assumed to be of suitable length for most uses of the
equipment. The use of extension cords and power strips is discouraged unless
they are of suitable rating to deliver the required total current for safe
operation of all connected equipment. Furthermore, extension cords or power
strips must provide the same three wire grounded connection. It is important
that the blades of the equipment’s plug be able to fully insert into the
mating receptacle. Never remove the round grounding pin on the plug in an
attempt to mate to a two wire ungrounded receptacle: use a grounding adaptor
with the grounding tab or wire suitably connected to earth ground.
-1-
11. NON-USE PERIODS During periods of extended non-use, the power cord should
be unplugged from the power source.
12. CLEANING The equipment should be cleaned only as detailed in the
operating instructions.
13. OBJECT AND LIQUID ENTRY Care should be taken so that objects and/or
liquids, such as cleaning fluids or beverages, are not spilled into the
enclosure of the equipment.
14. DAMAGE REQUIRING SERVICE Hafler equipment should be serviced by qualified
service personnel when: A. The power supply cord or plug has been damaged, or
B. Objects have fallen, or liquid has been spilled into the equipment, or C.
The equipment has been exposed to rain, or D. The equipment does not appear to
operate normally or exhibits a marked change in performance, or E. The
equipment has been dropped, or the enclosure has been damaged.
15. SERVICING The user should not attempt to service the equipment beyond
that which is described in the operating instructions. All other service
should be referred to qualified service personnel.
16. CARTS AND STANDS The equipment should be used with carts or stands only
of sufficient strength and stability for the use intended. An equipment and
cart combination should be moved with care. Quick stops and starts, excessive
force, and uneven surfaces may cause the equipment and cart combination to
topple.
-2-
TABLE OF CONTENTS
PERFORMANCE SPECIFICATIONS ………………………………………………………………………………
4
General Information ………………………………………………………………………………………………..
4
INSTALLATION
Rackmounting.. ……………………………………………………………………………………………………….
5
Ventilation/Placement.. ……………………………………………………………………………………………
5
Line Voltage.. ………………………………………………………………………………………………………….
5
OPERATION/CONNECTIONS
Power Cord Connection/Power Switch.. …………………………………………………………………….
5
Inputs …………………………………………………………………………………………………………………….
5
Front Panel View Diagram.. ……………………………………………………………………………………..
6
Rear Panel View Diagram ……………………………………………………………………………………….
7
Outputs ………………………………………………………………………………………………………………….
8
Gain Controls.. ……………………………………………………………………………………………………….
8
Mono/Stereo Switching.. ………………………………………………………………………………………….
8
Soft Turn-On System ………………………………………………………………………………………………
8
Thermal Protection System ……………………………………………………………………………………..
8
CIRCUIT HIGHLIGHTS …………………………………………………………………………………………………
9
ADDITIONAL INFORMATION
Loudspeaker Load Impedance Considerations ………………………………………………………….
10
Changing Line Voltage Rating …………………………………………………………………………………
10
Adjusting Bias ……………………………………………………………………………………………………….
10
General Troubleshooting Hints ………………………………………………………………………………..
11
Ground Loops ……………………………………………………………………………………………………….
1 1
Cleaning/Maintenance …………………………………………………………………………………………..
12
Parts List.. …………………………………………………………………………………………………………….
12
Functional Block Diagram.. …………………………………………………………………………………….
14
Component Layout Diagram.. …………………………………………………………………………………
15
Circuit Schematic Diagram …………………………………………………………………………………….
17
SERVICE POLICY AND LIMITED WARRANTY.. ……………………………………………………………
19
-3-
PERFORMANCE SPECIFICATIONS
All specifications are for 20 Hz – 20 kHz, at full power into 8 ohms, unless specified otherwise.
Power Rating: 9180: 105 watts per channel (8 ohms) 150 watts per channel (4 ohms) 300 watts mono (8 ohms)
9270: 135 watts per channel (8 ohms) 200 watts per channel (4 ohms) 400 watts mono (8 ohms)
Rated THD:
less than 0.025%, typically 0.005% at 1 kHz
Full Power Bandwidth: 0.3 Hz to 116 kHz
Signal to Noise Ratio: greater than 100 dB, unweighted
Input Impedance:
47,000 ohms
Input Sensitivity: 9180: 1.4 volts RMS 9270: 1.6 volts RMS
Damping Factor:
300 to 1 kHz, 200 to 10 kHz
Slew Rate:
50 V/uS
G ENERAL INFO RMA TIO N
Controls: Inputs:
Power Switch, Left/Right Gain Controls, Mono/Stereo Switch Right and Left/Mono RCA jacks
outputs:
Right, Left, and Mono 5-Way Binding Posts
Power Consumption: 100 watts quiescent, 1200 watts maximum
Size:
17″(W) x 12.5″(D) w3.5″(H) excluding feet, faceplate 17″ or 19″(W)
43.2cm(W) x 31.7cm(D) x 8.9cm(H) excluding feet, faceplate 43.2cm or 48.3cm(W)
Weight:
9180: 33 Ibs., 15 kg, net. 9270: 35 Ibs., 15.9 kg, net.
-4-
INSTALLATION
RA C KMO UNTING VENTILA TIO N/ PLACEMENT
LINE VOLTAGE
The 9180/9270 Amplifier is supplied in either a 17″ Black Version, or a 19″
Silver Version. The 19″ model has rackmounting holes provided for installation
in equipment racks. The holes are on standard EIA spacings. Due to conflict
with adjacent equipment, it may be advisable to remove the four rubber feet
from the bottom of the unit. The feet may be removed from the outside, with no
dis-assembly of the chassis necessary.
The 9180/9270 Amplifier can produce considerable heat during normal operation.
The amplifier should be placed on a hard, smooth surface to allow air to
circulate beneath the unit. Additionally, allow at least one inch of free
space on either side, and several inches above and behind the amplifier to
allow air circulation around the heatsinks. This is particularly important
when the unit is installed in a closed cabinet.
In applications where the amplifier is driving low impedance and/or low
efficiency loudspeakers at high levels, thermal shutdown may occur if
inadequate ventilation is provided. If this occurs, it may be necessary to
move the amplifier to a location with better free air circulation.
The amplifier should be located at least several inches away from sensitive
components, (such as preamplifiers, tuners, CD players, turntables, etc.) due
to the possibility of audible hum or buzz from magnetic radiation.
The 9180/9270 Amplifier is configurable for either 100, 120, 220 or 240 volt
operation. This is accomplished by moving the Voltage Selector on the printed
circuit board. The procedure is detailed in the section “CHANGING LINE VOLTAGE
RATING”.
Make sure that the unit is configured for your local AC line voltage before
attempted use. The configuration is labelled directly above the power cord
connector.
OPERATION/CONNECTIONS
POWER CORD CONNECTION/ POWER SWITCH
Units wired for 100, 220 and 240 VAC are supplied without power cords. Local
agents will supply cords with male connectors appropriate to the local
standard.
Units wired for 120 VAC are supplied with a detachable AC power cord. The
female connector plugs into the receptacle provided on the rear panel. This
power cord is a standard IEC TTyyppee332200, 3, -3w-iwreir,e, 16 gauge
assembly. Should replacement ever be necessary, be sure to replace it with an
identical cord.
Never remove the grounding pin from the male end of the cord. In applications where a grounded outlet is not available, a ground adaptor should be employed, with the ground tab or wire of the adaptor connected to a suitable earth ground.
The AC power cord of the amplifier must be connected to a receptacle capable
of delivering a minimum of 1200 watts. The convenience outlets of some
preamplifiers are not rated for this power level. Before connecting the
amplifier, be sure to check the rating of such outlets, and take into account
the power consumption of any other connected components to determine the total
maximum power consumption.
If the amplifier is connected to a component with a switched convenience
outlet, then the amplifier’s Power Switch may be left ON at all times, and the
power controlled by the switched outlet. If the amplifier is connected to an
unswitched outlet, then the amplifier’s power should be controlled by the
front panel Power Switch.
INPUTS
All input connections to the amplifier must be performed with the amplifier
off!
The left and right audio inputs to the amplifier are via standard RCA jacks.
In addition to the printed labelling above the jacks, the channels are
identified by RED for right channel, and WHITE for left channel. Connect these
jacks to the output of the preamplifier or other signal source.
When operating the amplifier in the Mono Mode, only the left channel input should be used.
– 5-
LEFT/MONO GAIN
POWER SWITCH UP – ON
DOWN – OFF
RACKMOUNT HOLES (19″ VERSION ONLY)
RIGHT GAIN
RACK HANDLES (19″ VERSION ONLY)
9180 / 9270 AMPLIFIER FRONT PANEL VIEW
zyxwMONO/STEREO SWITCH IN – MONO OUT – STEREO
RI GtiT I N IT
AC LINE
VOLTAGE
LEFT/MONO
RATING
INPUT
I I-
LINECORD CONNECTOR
– TT –
MONO+ OUTPUT
I!I
+ –
RIGHT
LEFT
OUTPUT OUTPUT
9180 / 9270 AMPLIFIER REAR PANEL VIEW
O UTPUTS I
All output connections to the amplifier must be performed with the amplifier
off!
The left and right audio outputs from the amplifier are via standard
55-w-waayytytpyep,e3,/43″ /s4p”ascipnagc, ing, binding posts. Connect these
binding posts to the loudspeakers. The amplifier’s binding posts will accept
single or dual banana plugs, spade lugs, pin plugs, or bare wires. If using
bare wires, it is recommended that the ends of the wire be tinned with solder
so that no stray strands can cause a short circuit to the chassis or adjacent
terminals.
To ensure proper speaker phasing and frequency response, be sure to connect each respective amplifier RED (+) terminal to the speaker RED (+) terminal, and the amplifier BLACK (-) terminal to the speaker BLACK (-) terminal. The polarity symbols (+/-) for Stereo Mode are labelled below the amplifier’s binding posts.
For operation in the Mono Mode, a single loudspeaker should be connected to the two RED binding posts only. No connection is made to the amplifier’s BLACK binding posts. Connect the speaker’s RED (+) terminal to the amplifier’s RED terminal labelled (+), and the speaker’s BLACK (-) terminal to the amplifier’s RED terminal labelled (-). The polarity symbols (+/-) for the Mono Mode are labelled above the amplifier’s binding posts.
G A IN C O NTRO LS
The 9180/9270 Amplifier is equipped with front panel mounted Gain Controls. These controls may be used to attenuate the input signal to the amplifier. The maximum clockwise position of these controls applies the full input signal to the amplifier. Intermediate positions of these controls will partially attenuate the signal, and the full counter-clockwise position attenuates the input signal completely.
Most applications will dictate that these controls be set to their maximum clockwise position. In situations of unusually high level signal sources, or for matching levels in multiple amplifier installations, it may be desirable to use an intermediate position of the Gain Controls. Unless intentionally introducing different gain levels in the two channels of the amplifier, these controls should normally be set at the same rotational position.
In the Mono Mode, the Left Gain Control effects the overall gain of the amplifier. The Right Gain Control has no effect.
MO NO / STEREO SWITC HING
The 9180/9270 Amplifier may be operated in the normal two channel Stereo Mode,
or may be converted (bridged) to a higher power, single channel amplifier in
the Mono Mode.
Operation of the Stereo/Mono switch must be performed with the amplifier off!
Set the Stereo/ Mono Switch in the OUT position for Stereo Mode, or in the IN
position for Mono Mode. Mono Mode operation requires different input and
output connections: consult the sections of the manual titled “Inputs” and
“Outputs”.
SO FT TURNO N/ O FF SYSTEM
The 9180/9270 Amplifier is equipped with a Soft Turn-On/Off System that
gradually activates the amplifier’s circuitry to avoid spurious noises as the
power supply stabilizes.
At turn-off, this same system rapidly deactivates the amplifier’s circuitry
before the power supply begins to collapse, again eliminating any spurious
noises.
THERM A L PROTECTION
SYSTEM
The 9180/9270 Amplifier is equipped with a Thermal Protection System that constantly monitors the temperature of the heatsinks. When the heatsink temperature reaches a pre-determined level, the amplifier’s circuitry is electronically shut down through the same system that provides the Soft Turn- On function. When the heatsinks cool to a safe operating temperature, normal operation of the amplifier resumes.
-8-
CIRCUIT HIGHLIGHTS
The input stage of the 9180/9270 Amplifier utilizes four low-noise, High-g,
JFET’s (high transconductance junction field-effect transistors), in a fully
complimentary, symmetric configuration. This circuit configuration results in
excellent front-end headroom and a simple, straightforward connection to the
remainder of the circuitry. The ultra low noise characteristics of the JFET’s
virtually eliminates noise “mixing” (intermodulation) with the music signal,
reducing discordant product frequencies known as “noise grain”, or “noise
fuzz”.
The input stage is cascode connected to convert the low voltage input system
to the high voltage output system, and “speeds up” the front end for superior
bandwidth. The cascode stage is connected to an emitter-follower and current
mirror configuration that amplifies the current level about ten times,
necessary to drive the biasing string and final output stage driver emitter
followers.
The final output stage uses multiple lateral MOSFET’s (Metal Oxide
Semiconductor Field Effect Transistors): four devices per channel in the 9180,
and six per channel in the 9270. These devices, unlike conventional bipolar
transistors, have a negativetemperature coefficient, which means that they do
not exhibit “thermal runaway”. Thermal runaway is a phenomenon whereby a
transistor heats up as it conducts more current, which causes it to get
hotter, and conduct more current, and so on, until the device self destructs.
Since MOSFET’s are inherently self-protecting, no sonically degrading, complex
circuitry is required to monitor and protect the output devices.
Furthermore, these lateral MOSFET’s exhibit a very linear input to output
transfer function. Their connection in circuits and operating characteristics
are very similar to vacuum tubes, which is perhaps responsible for their
widely recognized sonic trait of being very “musical” and non-fatiguing.
Conversion to Mono Mode is accomplished by driving the negative input
(feedback point) of the right channel with the output of the left channel.
This causes the right channel to mirror exactly the output of the left
channel, but 180 degrees out of phase. This creates twice the voltage swing to
be available across the two red output binding posts. This simple method of
bridging the amplifier (involving only one resistor) eliminates the costly and
sonically degrading invertor circuitry used in other amplifiers.
The Thermal Protection System consists of thermistors (temperature sensitive
resistors) mounted to the heatsinks, connected to a comparator system that
activates when the heatsinks reach an unsafe operating temperature. The output
of the comparator system is connected to a small MOSFET switch that turns off
the input stage of the amplifier, which effectively shuts down the entire
amplifier. When the heatsinks cool to a safe temperature, the amplifier is
turned on again.
The Soft Turn On/Off System cooperates with the Thermal Protection System by
sensing the high voltage power supply. At power up, when both the comparator
and power supply have stabilized to normal operating levels, the Soft Turn On
System activates the amplifier circuitry through the same MOSFET switch in the
input stage. At power down, the system deactivates the amplifier rapidly
before the power supply begins to collapse. This system eliminates spurious
noises during the turn on/off cycle.
The power supply utilizes a very large UI type transformer with dual multi-
tapped primaries to allow alternate connections for world-wide voltage
operation. Selection of the various voltage options is made via a simple
multi-position plug inside the unit. The UI type of transformer construction
results in very low stray magnetic leakage.
The transformer feeds a conventional split full-wave bridge rectifier system.
Power supply capacitance is 15,000 uF per rail. Further power supply de-
coupling is provided for the input stage of each channel.
-9-
ADDITIONAL INFORMATION
LOUDSPEAKER LOAD IMPEDANCE CONSIDERATIONS
CHANGING LINE VOLTAGE RATING
ADJUSTlNG BIAS
The 9180/9270 Amplifier is suitable for use with a wide variety of loudspeaker types and load impedances. Though not rated for impedances below 4 ohms, the amplifier is capable of driving lower impedances. Operation at low impedances is limited by the thermal dissipation capacity of the heatsinks and the airflow around the unit. Operation at very high power levels into low impedances for extended periods may overheat the amplifier, but no damage will occur due to the Thermal Protection System.
In the Mono Mode, some additional consideration is required when driving low impedances. When a stereo amplifier is converted (bridged) into a single channel mono amplifier, each half of the bridged amplifier “sees” only half of the loudspeaker’s load impedance. For example, when driving an 8 ohm load in the Mono Mode, each channel is actually loaded to 4 ohms. Therefore, little advantage is gained when attempting to drive 4 ohm loads (2 ohms per channel) in the Mono Mode, because of the reduced power available at extremely low impedances. It is usually better to use a stereo amplifier of higher power rating (rather than two bridged amplifiers of lower power) when driving low impedances.
The 9180/9270 Amplifier is equipped with a simple means to adjust the AC line voltage rating for 100, 120, 220, or 240 volts AC, 50/60 Hz. The configuration is labelled above the power cord connector. If the amplifier will be used in a location that requires a different line voltage, use the following procedure to change the configuration. Review the modification instructions before attempting this procedure. If any doubts exist about one’s ability to change the line voltage, it is advisable that the procedure be conducted by a qualified technician.
WARNING! UNPLUG THE UNIT FROM AC POWER BEFORE ATTEMPTING THIS PROCEDURE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK.
-
Remove the top cover by removing the seven allen head screws (three on each side, one at rear center).
-
Using the diagram “Component Layout” as a guide, find the white Voltage Selector plug on the printed circuit board located behind the front panel Power Switch. Note that this plug has
several alternate positions. Each position is labelled for where the end of the plug is to be
aligned for each appropriate voltage. Move this plug to the new desired position, making sure
that the plug is fully seated on the mating pins. -
Depending upon which new voltage is chosen, it may be necessary to change the AC line fuse. Locate the clip-mounted Line Fuse adjacent to the Voltage Selector plug. Replace the
fuse with a new slow-bblloowwfufussee as follows:
9180:
100 and 120 VAC: 7 amp 220 and 240 VAC: 4 amp
9270:
100 and 120 VAC: 10 amp 220 and 240 VAC: 5 amp
- Replace the cover.
- Obtain a new voltage configuration label from the factory, and affix over the original markings on the rear panel. Alternately, prepare a small self- adhesive label and indicate the new voltage with permanent ink. Relabelling the unit is a vital safety requirement, particularly if the amplifier is sold to a new owner.
The 9180/9270 Amplifier employs a single control per channel to set the bias operating point of the output stage. This bias point is factory set, and normally should not require adjustment for the life of the product. However, should improper bias be suspected, or if repairs have been made that would require a readjustment of bias, the following procedure should be used. Review the instructions before attempting this procedure. If any doubts exist about one’s ability to set the bias, it is advisable that the procedure be conducted by a qualified technician.
-10-
WARNING! UNPLUG THE UNIT FROM AC POWER BEFORE ATTEMPTING THIS PROCEDURE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK.
REQUIRED TEST EQUIPMENT: Milliammeter capable of measuring at least 300 mA.
- Remove the top cover by removing the seven allen head screws (three on each
side, one at rear
center). - Using the diagram “Component Layout” as a guide, find the fuses labelled F1 and F2 for the left channel, or F1 01 and F102 for the right channel.
- Working on one channel at a time, remove either one (and only one) of the fuses. Connect the milliammeter to the two fuse clips, and set the meter to a scale capable of measuring at least 300 mA.
GENERAL TROUBLESHOOTING
HINTS
GROUND LOOPS
WARNING! THE NEXT STEP OF THIS PROCEDURE CAN EXPOSE THE OPERATOR TO
UNINSULATED HIGH VOLTAGES. KEEP ALL BODY PARTS CLEAR OF THE INTERNAL CIRCUITRY
OF THE AMPLIFIER.
4) Apply power to the amplifier, and allow the unit to thermally stabilize for
about three minutes. (If using an analog meter, and the meter reads backwards,
temporarily remove power and reverse the meter leads.)
5) Again referring to the diagram, locate the trimmer potentiometer labelled
Pl for the left channel, or P101 for the right channel. Using a small
screwdriver, adjust the trimmer for a measured current according to the
following:
9180: 200 mA 9270: 300 mA
6) Remove power from the amplifier. Wait about one minute for the power supply
to discharge, and remove the meter connections. Replace the fuse.
7) Repeat steps #2,3, 4, 5 and 6 for the other channel.
8) Replace the covers.
The 9180/9270 Amplifier contains five internal fuses: one for AC line power,
and four for DC power supplies. These fuses should not generally blow unless a
malfunction has occurred. These fuses should be replaced only by a qualified
technician, and only with the exact type(s) and rating of fuse(s) originally
supplied. If a fuse is replaced and blows again within a short time, check all
output connections for short circuits, or abnormally low speaker load
impedances. If all connections and load conditions appear to be correct,
disconnect all power immediately and return for service.
If all controls, fuses, cables, etc. seem to be functioning properly, a
process of one-at-a-time component substitution should be employed until the
defective unit is identified. If only one channel is not functioning properly,
a one-at-a-time reversal of interconnect and speaker cables from left to right
should reveal the malfunctioning component.
Ground loops are characterized by a low level hum or buzz in the system. Loops
are caused by a voltage potential difference between two points in a ground
circuit, and aggravated when multiple paths for a given circuit exist. Noise-
free audio performance is dependent upon all grounds being at the same
potential, with a single path for each ground connection. Ground loops can
exist in two forms: 1) loops created in audio interconnects, and 2) loops
created between earth grounded chassis.
Mounting components to a rack with metallic rails may introduce ground loops
between associated equipment, because the rails can introduce a second ground
path. The extent of this problem will depend on the grounding arrangements of
associated equipment. Ground loops can occur in nonrackmounted equipment,
though it is less common.
If ground loops occur, and any other component in the system has a three wire
grounded power cord, the first step should be to use a ground adaptor (with
the ground tab or wire of the adaptor not connected) on the power cord plug of
the preamplifier. DO NOT cut off the grounding pin on the plug!
-11-
CLEANING/ MAINTENANCE
It may be necessary to use additional adaptors on other grounded components if
more than two components are earth grounded. (In other words, only one earth
ground per system should exist.) Another potential source of multiple earth
grounds is from coaxial antenna or cable service feeds for FM or video
sources, which usually are (and should be) earth grounded. The ground
adaptor(s) should cure this grounding problem as well.
WARNING: The use of ground adaptors (with the ground tab or wire of the
adaptor disconnected) will eliminate the safety feature of the grounded power
cord. This safety feature is intended to reduce the risk of electric shock
should an internal fault in the equipment result in an electrically “live”
chassis. Therefore, this method of ground isolation should be employed only
when absolutely necessary, rather than as a general practice. When using a
ground adaptor for isolation, make sure that the power cord plug is inserted
into the receptacle in the same orientation as if no adaptor were present, to
maintain the same hot/neutral polarity.
SPECIAL NOTE ON VIDEO CABLE “GROUNDS”: As mentioned above, the ground
conductor of cable service and antenna feeds should be connected to earth
ground. Often, however, due to long feed lengths, especially in apartment
distribution systems, this ground will be of poor quality and could be a
source of noise. This interference is usually characterized by a high
frequency noise, rather than a hum or a buzz. If such interference is
experienced, a separate earth ground connection should be made from the cable
outlet nearest the audio/video equipment to a known good earth ground.
If ground loops exist due to potential differences in the interconnects in
rack mounted systems, then it is advisable to isolate the preamplifier chassis
from the rack rails. This may be accomplished by sandwiching a thin sheet of
insulating material (i.e., plastic washers or several layers of electrical
tape, etc.) between the rack and the preamplifier, and securing the unit with
non-metallic (i.e., nylon, etc.) hardware. It may be necessary to insulate
other components so that only one component is directly connected to the rack
rails.
If the faceplate should become soiled, it may be cleaned with a slightly damp,
soft cloth and, if necessary, a mild detergent. Do not use any abrasive
cleaners or solvents. Unplug the power cord before attempting any cleaning
operations.
Except as specifically detailed in the owners manual, there are no user
serviceable parts or adjustments inside the 9180/9270 Amplifier, and all
servicing should be referred to qualified, authorized personnel.
PPAarRtsTLSisLt IST
DESIGNATORS
l- 99: 101-l 99: 201-299: 301-399:
LEFT CHANNEL RIGHT CHANNEL COMMON PARTS CHASSIS/POWER SUPPLY
DESIGNATOR
VALUE
PART NUMBER
ALL RESISTORS 114 WATT, 1% METAL FILM (unless specified otherwise))
R1,R101 R2,R102 R3,R103 R4,R104 R5,R105 R6,R106 R7,R107 R8,R108 R9,R109 R10,R110 R11,R111 R12,R112
2.43K 2.43K 47.5 47.5 66.1 47.5 47.5 1K 1K 6.61K 47.5K 2.43K
RMP/4-2431 RMP/4-2431 RMP/4-0475 RMP/4-0475 RMP/4-0681 RMP/4-0475 RMP/4-0475 RMP/4-1001 RMPN-1001 RMP/4-6811 RMP/4-4752 RMP/4-2431
-12-
DESIGNATOR
R13,R113 R14,R114 R15,R115 R16,R116 R17,R117 R18,R118 R19,R119 R20,R120 R21
,R121 R22,R122 R23,R123 R24,R124 R25,R125 R26,R126 R27,R127 R28,R128 R29,R129
R30,R130 R31 ,R131 R32,R132
VALUE
267 267 1K 1K 100 100 47.5K 562 475 10 47.5 47.5 221 475 475 475 221 221 221
475K
PART NUMBER
RMP/4-2670 RMP/4-2670 RMP/4-1001 RMP/4-1001 RMP/4-1000 RMP/4-1000 RMP/4-4752
RMP/4-5620 RMP/4-4750 RMP/4-0100 RMP/4-0475 RMP/4-0475 RMP/4-2210 RMP/4-4750
RMP/4-4750 RMP/4-4750 RMP/4-2210 RMP/4-2210 RMP/4-2210 RMP/4-4753
DESIGNATOR
R33,R133 R34,R134 R35,R135 R36,R136 R37,R137 R38,R138 R39,R139 R40,R140
R41,R141 R42,R142 R43,R143 R44,R144 R45,R145 R46,R146 R47,R147 R201 R202 R203
R204 R205 R206 R207 R208 R209 R210 R211 R212 R213
VR1 ,VR101
P1,P101
VALUE
47.5K 33.2K 47.5K 100 100 100 100 15K 10,5W, Wirewound 1K 4.75M 1M 1M 1M 1M
7.5K, .5 W, Carbon 7.5K, .5 W, Carbon 100K 10K 18.2K 332K 18.2K 332K 1K 68.1K
33.2K 33.2K 47.5K
50K Volume
1 K Trim
PART NUMBER
RMP/4-4752 RMP/4-3322 RMP/4-4752 RMP/4-1000 RMP/4-1000 RMP/4-1000 RMP/4-1001
RMP/4-1502 RW5-100 RMP/4-1001 RMP/4-4754 RMP/4-1004 RMP/4-1004 RMP/4-1004
RMP/4-1004 RC/2-752 RC/2-752 RMP/4-1003 RMP/4-1002 RMP/4-1822 RMP/4-3323
RMP/4-1822 RMP/4-3323 RMP/4-1001 RMP/4-6811 RMP/4-3322 RMP/4-3322 RMP/4-4752
RVH-503G
RV-102
ALL CAPACITORS IN MICROFARADS (unless specified otherwise)
DESIGNATOR
VALUE
PART NUMBER
C1,C101
C2,C102
C3,C103
C4,C104 C5,C105
C6,C106
C7,C107
C8,C108
C9,C109
C10,C110
C11,C111 C12,C112 C13,C113
C14,C114
C15,C115
C16,C116
C17,C117 C18,C118 C19,C119 C20,C120
330p, Polypropylene 330p, Polystyrene 10p, Mica 8p, Polystyrene 0.1, Polycarbonate 0.1, Polypropylene 220, NP Electrolytic 0.001, Polypropylene 0.001, Polystyrene 0.001, Polypropylene 0.001, Polystyrene 220p, Polypropylene 220p, Polystyrene 0.1, Polycarbonate 0.1, Polypropylene 0.1, Polycarbonate 0.1, Polypropylene 0.1, Polycarbonate 0.1, Polypropylene 100, Electrolytic 100, Electrolytic 0.1, Polycarbonate 0.1, Polypropylene 0.1, Polycarbonate 0.1, Polypropylene 330p, Polypropylene 330p, Polystyrene 0.1, Polycarbonate 0.1, Polypropylene Not Used Not Used Not Used 0.47, Polycarbonate
CPP-331 (9180) CPS-331 (9270) CM-100 (9180) CPS-080 (9270) CPC-104 (9180) CPP-
104MC (9270) CERNP-227 CPP-102 (9180) CPS-102 (9270) CPP-102 (9180) CPS-102
(9270) CPP-221 (9180) CPS-221 (9270) CPC-104 (9180) CPP-104MC (9270) CPC-104
(9180) CPP-104MC (9270) CPC-104 (9180) CPP-104MC (9270) CER-107D CER-107D
CPC-104 (9180) CPP-104MC (9270) CPC-104 (9180) CPP-104MC (9270) CPP-331 (9180)
CPS-331 (9270) CPC-104 (9180) CPP-104MC (9270)
CW-474
DESIGNATOR
C21,C121 C22,C122 C201 C301 C302 C303 C304
Q1 ,Q101 Q2,Q102 Q3,Q103 Q4,Q104 Q5,Q105 Q6,Q106 Q7,Q107 Q8,Q108 Q9,Q109
Q10,Q110 Q11,Q111 Q12,Q112 Q13,Q113 Q14,Q114 Q15,Q115 Q16,Q116 Q17,Q117
Q18,0118 Q19,0119 Q20,Q120 Q21,Q121 Q22,Q122 Q201
U1
TS1 TS2 TRM
CR1 ,CR101 CR2,CR102 CR3,CR103 CR4,CR104 CR5,CR105 CR6,CR106 CR7,CR107 CR201
CR202 CR203
BR301
J1 J101 J2,J102 J201
J301 SW1 S301
T301
F1 ,F101
F2,F102
LINE FUSE
-13-
VALUE
PART NUMBER
0.01, Polypropylene 0.01, Polypropylene 0.01, Polycarbonate 15000, Electrolytic 15000, Electrolytic 0.01, Ceramic 0.01, UL Approved
CPP-103A CPP-103A CYV-103 CER-159ES CER-159ES CD-l 03/20 CD-103A
2SK163, Graded 2SK163, Graded 2SJ74, Graded 2SJ74, Graded 2N5550 2N5550 2N5401
2N5401 2N5401 2N5550 2N5415 2N3440 2N2222A 2N3440 2N5415 2SK1057, Graded
2SK1057, Graded 2SK1057, Graded 2SJ161, Graded 2SJ161, Graded 2SJ161, Graded
2N7000 MPSA56
LM393
SSH614T SSH-614T SSH-617DT SSH-617DT SSH613 SSH-613 SSH-708 SSH-708 SSH-708
SSH-613 SSH-616 SSH-612 SSH-611 SSH612 SSH-616 SSH-717T SSH-717T (9270 Only)
SSH-717T SSH-719T SSH-719T (9270 Only) SSH-719T SSH-724 SS-1O1A
SS-207
Thermal Sensor Thermal Sensor Inrush Limitor
FDH400 FDH400 1N4148 1 N5245B,15V 1 N5245B,15V 1N4148 1N4148 1 N52458,15V 1
N52458,15V 1N4148
SS-215 SS-215 SSH-618
SS-163 SS-163 SS-162 SS-212 SS-212 SS-162 SS-162 SS-212 SS-212 SS-162
Diode Bridge
RCA Jack, White RCA Jack, Red 5-Way Binding Post AC Voltage Selector Header:
Housing: Pins: IEC Connector Stereo/Mono Switch Power Switch
SSH-609
CCH-232 CCH-231 CC-568
CCH-245 CCH-246 CCH-247 CCH-233 SWH-510 SWH-152G (Gray) SWH-152B (Black)
Power Xformer
TT-9180 (9180) TT-9270 (9270)
5 Amp 7 Amp 5 Amp 7 Amp 7 Amp Slo-Blo 4 Amp Slo-Blo 10 Amp Slo-Blo 5 Amp Slo- Blo
FS-005 (9180) FS-007 (9270) FS-005 (9180) FS-007 (9270) FS-007SB (9180 100-120V) FS-004SB (9180 220-240V) FS-010SB (9270 100-120V) FS-005SB (9270 220-24OV)
LEFT/MONO INPUT
LEFT/MONO
RIGHT INPUT
MONO/STEREO SWITCH
b LEFlOUTPUT
THERMAL SENSORS b
THERMAL PROTECTION –
SYSTEM
A
SOFT
TURN ON/OFF SYSTEM
9180 / 9270 FUNCTIONAL BLOCK DIAGRAM
NOIlVtl(
R23
lRl5
RI7
1
,
2N7000
T
-Ra4-*0,
I
(SEE F&b C H A R T ) d+HV
1 2:
6
(SEE FL% C H A R T )
ZiRCUIT SCHEMATIC DIAGRAM
RMSED 1 l/13/91zyxwvutsrqponmlkjihgfedRc20b1 aZYXjl5VWVUTSRQPONMLKJIHGFEDCBA
+HV-
;
–
7.5K
11
ll——TT–++++”++HHvv
CR201 1 N5245>’
R210 68.1 K
R212 33.2K $ C20, ::a
0.01
.’ b TO R. CH. @I + TO L. CH. @
NOTE!3 UNLESS SPECIFIED OTHERWISE
1. ALL RESISTORS IN OHMS
2. ALL CAPACITORS IN MICROFARADS
3. COUPONENT DESIGNATORS: l – 9 9 : LEFT C H A N N E L 101-199: RIGHT CHANNEL 2 0 1 – 2 9 9 : C O M M O N PARTS 301-399: CHASSIS/POWER
SUPPLY
4 . Ql7/Q117 & Q20/Q120 N O T P R E S E N T O N SERIES 9180
5. LEFT CHANNEL ONLY SHOWN
6. STEREO/MONO SWITCH SHOWN IN STEREO
7. VOLTAGE SELECTOR SHOWN IN 1OOV POSITION
6 . Ql/QlOl & Q2/Q102 U S E T W O 2SK163 S I N G L E JFET’S OR ONE 2SK389 DUAL JFET
9 . Q3/Q103 & Q4/Q104 U S E T W O 2SJ74 S I N G L E JFET’S OR ONE 251109 DUAL JFET
1 0 . R44/R144. R45/R145. R46/R146. R47/R147. C21/C121. C22/C122 ARE PRESENT
ONLY WHEN USING DUAL JFET’S
2SK389 & 2SJ109 ( F O R S U B S T R A T E B I A S I N G )
1 1 . C17/C117. C18/C118 C19/C119 N O T U S E D
J101 RIGHT INPUT
LEF;IiNPUT
FUSE CHART
R33
47.5K
7;
!%I”‘
R34 33.2K
I
HOTI o
, NEUTRAL
—
R35
4 7.5K
9180/9270 CiRCUIT S C H E M A T I C DIAGRAM
REMSED 1 l/13/91
+HV
-HV
I
I
J
I
SERVICE POLICY AND LIMITED WARRANTY
If you encounter any difficulty or have any question concerning your 9180/9270
Amplifier, please call our Customer Service Department weekdays, 8 a.m. to
3:30 p.m., Mountain Standard Time, at
602-967-3565. Should you have any
doubts as to whether the amplifier is malfunctioning and requires service,
please call us before sending in for repair. All units being returned
(regardless of warranty status) must receive a Return Authorization (RA)
number. In addition, we can offer troubleshooting assistance that may simplify
or even eliminate the need for factory service. The Hafler 9180/9270 Amplifier
is warranted to the original owner (non-transferrable) for seven years from
the date of purchase, including parts, labor, and return shipping costs within
the Continental United States, Alaska, and Hawaii. This warranty applies only
to products sold in the United States Of America. For warranties outside the
U.S.A., please contact your local agent. It is the owner’s responsibility to
pay shipping (preferably United Parcel Service, UPS) to the factory: collect
shipments will not be accepted. Units under warranty should be accompanied by
acopyof the dated Bill Of Sale. Use the original carton and all packing
material, with the RA number clearly marked on the outside of the package. Be
sure to include a return address, the RA number, a daytime telephone number,
and a brief description of the difficulty, including whether it occurs
continuously or intermittently. This warranty gives you specific legal rights.
You may also have other rights which vary from state to state.
-19-
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>