SHARP R-1210 Over the Counter Microwave Oven Owner’s Manual

R-1210 Over the Counter Microwave Oven

Product Information

Product Usage Instructions

Precautions

• Do not operate or allow the oven to be operated with the door
  open.

• Make the following safety checks on all ovens to be serviced
  before activating the magnetron or other components.

Before Servicing

1. 1. Disconnect the power supply cord from the outer case.

2. Open the door and block it open.
3. Discharge the high voltage capacitor.

WARNING: RISK OF ELECTRIC SHOCK. DISCHARGE THE
HIGH-VOLTAGE CAPACITOR BEFORE SERVICING.

The high-voltage capacitor remains charged about 60 seconds
after the oven has been switched off. Wait for 60 seconds and then
short-circuit the connection of the high-voltage capacitor (that is
the connecting lead of the high-voltage rectifier) against the
chassis with the use of an insulated screwdriver.

During Servicing

Whenever troubleshooting is performed, the power supply must be
disconnected. In some cases, it may be necessary to connect the
power supply after the outer case has been removed. Follow these
steps:

1. Disconnect the power supply cord from the outer case.

2. Open the door and block it open.

3. Discharge the high voltage capacitor.

4. Disconnect the leads to the primary of the power
   transformer.

5. Ensure that these leads remain isolated from other components
   and oven chassis by using insulation tape.

6. After completing the above procedure, reconnect the power
   supply cord.

After Servicing

When the testing is completed, follow these steps:

1. Disconnect the power supply cord from the outer case.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Reconnect the leads to the primary of the power
   transformer.

R-1210 R-1211

SERVICE MANUAL
S2203R1510X//

OVER THE COUNTER MICROWAVE OVEN

MODELS R-1210

SENSOR

R-1211

In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..)

This is a supplemental Service Manual for Models R-1210 and R-1211. These models are quite similar to base model R-1200 and R-1201. Use this supplemental manual together with the Base Models Service Manual (Reference No. is SY130R1200X//) for complete operation, service information, etc..

TABLE OF CONTENTS Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ………………. INSIDE FRONT COVER BEFORE SERVICING ………………………………………………………………………………………… INSIDE FRONT COVER WARNING TO SERVICE PERSONNEL …………………………………………………………………………………………………. 1 MICROWAVE MEASUREMENT PROCEDURE ……………………………………………………………………………………… 2 FOREWORD AND WARNING ………………………………………………………………………………………………………………. 3 PRODUCT SPECIFICATIONS ……………………………………………………………………………………………………………… 4 CONTROL PANEL ………………………………………………………………………………………………………………………………. 4 OPERATION ………………………………………………………………………………………………………………………………………. 5 TROUBLESHOOTING GUIDE ……………………………………………………………………………………………………………… 7 TEST PROCEDURE ……………………………………………………………………………………………………………………………. 8 TOUCH CONTROL PANEL ASSEMBLY ……………………………………………………………………………………………… 14 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ………………………………………………………. 20 PICTORIAL DIAGRAM ………………………………………………………………………………………………………………………. 24 POWER UNIT CIRCUIT …………………………………………………………………………………………………………………….. 25 LSI UNIT CIRCUIT …………………………………………………………………………………………………………………………….. 26 PRINTED WIRING BOARD ………………………………………………………………………………………………………………… 27 PARTS LIST …………………………………………………………………………………………………………………………………….. 28 PACKING AND ACCESSORIES …………………………………………………………………………………………………………. 33

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

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R-1210 R-1211
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse. (c) Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections. (d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner. (e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner.
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately @1-800-237-4277. If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration’s Center for Devices and Radiological Health immediately. Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.
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R-1210 R-1211

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.
(Example)
High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all instructions.

Don’t Touch ! Danger High Voltage

Before Servicing

1. Disconnect the power supply cord outer case.
2. Open the door and block it open. 3. Discharge high voltage capacitor.

, and then remove

WARNING: RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGH-VOLTAGE CAPACITOR BEFORE SERVICING.
The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection of the highvoltage capacitor (that is the connecting lead of the highvoltage rectifier) against the chassis with the use of an insulated screwdriver.

Whenever troubleshooting is performed the power supply must be disconnected. It may, in some cases, be necessary to connect the power supply after the outer case has been removed, in this event, 1. Disconnect the power supply cord, and then remove
outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect the leads to the primary of the power
transformer. 5. Ensure that these leads remain isolated from other
components and oven chassis by using insulation tape. 6. After that procedure, reconnect the power supply cord.

When the testing is completed, 1. Disconnect the power supply cord, and then remove
outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Reconnect the leads to the primary of the power
transformer. 5. Reinstall the outer case (cabinet). 6. Reconnect the power supply cord after the outer case is
installed. 7. Run the oven and check all functions.
After repairing
1. Reconnect all leads removed from components during testing.
2. Reinstall the outer case (cabinet). 3. Reconnect the power supply cord after the outer case is
installed. 4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out Before Servicing procedure and reexamine the connections to the component being tested.
When all service work is completed and the oven is fully assembled, the microwave power output should be checked and microwave leakage test should be carried out.

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R-1210 R-1211
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:

1. Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
2. Safety interlock switches: Primary interlock switch shall prevent microwave radiation emission in excess of the requirement as above mentioned, secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
   B. Preparation for testing: Before beginning the actual measurement of leakage, proceed as follows: 1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
   Important: Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
3. Place the oven tray in the oven cavity. 3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5°C (68°F) in the center of the oven cavity.
   The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.) and made of an electrically nonconductive material such as glass or plastic. The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage is measured accurately. 4) Set the cooking control on Full Power Cooking Mode 5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed, replace it with 275 ml of cool water.
   C. Leakage test:
   Closed-door leakage test (microwave measurement) 1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven. 2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
   the meter. 3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal
   has been breached (eg., around the switches, indicator, and vents). While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed latch assembly. 4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2, and that the primary interlock switch and the secondary interlock relay do turn the oven OFF before any door movement.
   NOTE: After servicing, record data on service invoice and microwave leakage report.
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R-1210 R-1211
SERVICE MANUAL
OVER THE COUNTER MICROWAVE OVEN
R-1210/ R-1211 FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP OVER THE COUNTER MICROWAVE OVEN, R-1210 and R-1211. The models R-1210 and R-1211 are quite similar to base models R-1200 and R-1201 (Reference No. is SY130R1200X//). It is recommended that service personnel carefully study the entire text of this manual and base model service manual so that they will be qualified to render satisfactory customer service. Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.
WARNING Never operate the oven until the following points are ensured. (A) The door is tightly closed. (B) The door brackets and hinges are not defective. (C) The door packing is not damaged. (D) The door is not deformed or warped. (E) There is not any other visible damage with the oven. Servicing and repair work must be carried out only by trained service personnel.
DANGER Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing. Service personnel – Do not contact the following parts while the appliance is energized; High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness; If provided, Vent Hood, Fan assembly, Cooling Fan Motor. All the parts marked “*” on parts list are used at voltages more than 250V. Removal of the outer wrap gives access to voltage above 250V. All the parts marked “” on parts list may cause undue microwave exposure, by themselves, or when they are damaged, loosened or removed.
SHARP ELECTRONICS CORPORATION SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135
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R-1210 R-1211
ITEM Power Requirements Power Output Case Dimensions Cooking Cavity Dimensions 1.5 Cubic Feet Hood lamp Control Complement
Oven Cavity Light Safety Standard Weight

PRODUCT SPECIFICATION

DESCRIPTION
120 Volts / 14.1 Amperes 60 Hertz Single phase, 3 wire grounded
1100 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz
Width 23-7/8″ Height 14-1/16″ Depth 15- 9/16″
Width 17-1/2″ Height 9-7/8″ Depth 14-15/16″
2 bulbs, 20W x 2, Incandescent light bulbs
Touch Control System Clock ( 1:00 – 12:59 ) Timer (0 – 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate; HIGH ………………………………………… Full power throughout the cooking time P-90 ………………………………………………………….. approx. 90% of Full Power P-80 ………………………………………………………….. approx. 80% of Full Power P-70 ………………………………………………………….. approx. 70% of Full Power P-60 ………………………………………………………….. approx. 60% of Full Power P-50 ………………………………………………………….. approx. 50% of Full Power P-40 ………………………………………………………….. approx. 40% of Full Power P-30 ………………………………………………………….. approx. 30% of Full Power P-20 ………………………………………………………….. approx. 20% of Full Power P-10 ………………………………………………………….. approx. 10% of Full Power P-0 ……………………………………………. No power throughout the cooking time

CUSTOM HELP pad, KEEP WARM PLUS pad ACCENT LIGHT pad, TASK LIGHT pad, REHEAT pads SENSOR COOK CENTER pad DEFROST CENTER pad INSTANT SENSOR pads, Number selection pads POWER LEVEL pad, TIMER / CLOCK pad STOP/CLEAR pad, START/MINUTE PLUS pad

20W x 1 Incandescent light bulb

UL Listed

FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J

Approx. 50 lbs.

CONTROL PANEL

CUSTOM

KEEP

HELP WARM PLUS

REHEAT

FRESH ROLLS/ FROZEN ROLLS/ SENSOR

MUFFINS

MUFFINS

COOK CENTER

POPCORN

SENSOR REHEAT

ACCENT LIGHT

TASK LIGHT

BEVERAGE

HOT WATER

DEFROST CENTER

BAKED

FRESH

POTATOES VEGETABLES

COOK SENSOR LBS DEF HELP 1 1 0 0 WATTS

1

23 45

POWER LEVEL

TIMER CLOCK

6 7890

STOP CLEAR

START
MINUTE PLUS

NOTE: Some one-touch cooking features such as “MINUTE PLUS” are disabled after three minutes when the oven is not used. These features are automatically enabled when the door is opened and closed or STOP/CLEAR button is pressed.
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R-1210 R-1211

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

The following is a description of component functions during oven operation.

An example of how sensor works (Baked potatoes):

OFF CONDITION
Closing the door activates the door sensing switch and primary interlock switch. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 120 volts A.C. is supplied to the control unit. (Figure O-1).
1. The display will show “SHARP SIMPLY THE BEST PRESS CLEAR AND PRESS CLOCK”. To set any program or set the clock, you must first touch the STOP/CLEAR button. The display will clear, and ” : ” will appear .

1. Potatoes at room temperature. Vapor is emitted very

slowly.

MICROWAVE

POWER LEVEL P-0 TO P-90 COOKING
When Variable Cooking Power is programmed, the 120 volts A.C. is supplied to the power transformer intermittently through the contacts of relay (RY2) which is operated by the control unit within an interval second time base. Microwave power operation is as follows:

2. Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks.
AH SENSOR MICROWAVE

VARI-MODE

HIGH

(100% power)

P-90 (approx. 90% power)

P-80 (approx. 80% power) P-70 (approx. 70% power)

P-60 (approx. 60% power)

P-50 (approx. 50% power)

P-40 (approx. 40% power)

P-30 (approx. 30% power)

P-20 (approx. 20% power)

P-10 (approx. 10% power)

P-0

(0% power)

ON TIME 32 sec. 30 sec. 26 sec. 24 sec. 22 sec. 18 sec. 16 sec. 12 sec. 8 sec. 6 sec. 0 sec.

OFF TIME 0 sec. 2 sec. 6 sec. 8 sec.
10 sec. 14 sec. 16 sec. 20 sec. 24 sec. 26 sec. 32 sec.

Note: The ON/OFF time ratio does not correspond with the percentage of microwave power, because approx. 3 seconds are needed for heating of the magnetron filament.

SENSOR COOKING CONDITION
Using the Sensor Cooking function, the foods are cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results. When the food is cooked, water vapor is developed. The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experiment with each food category and inputted into the LSI.

3. Sensor detects moisture and humidity and calculates cooking time and variable power.
Cooking Sequence. 1. Operate the oven in sensor cooking mode by referring to
operation manual. NOTE: The oven should not be operated on Sensor Cooking
immediately after plugging in the unit. Wait two minutes before cooking on Sensor Cooking. 2. The coil of shut-off relay (RY1) is energized, the oven lamp, turntable motor and cooling fan motor are turned on, but the power transformer is not turned on. 3. After about 16 seconds, the cook relay (RY2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor. NOTE: During this first stage, do not open the door or touch STOP/CLEAR pad. 4. When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero. At this time, the door may be opened to stir food, turn it or season, etc. 5. When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off. 6. Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.

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R-1210 R-1211

NOTE: ” ” indicates components with potential above 250V.

CAVITY

MAGNETRON

TEMPERATURE FUSE TEMPERATURE FUSE

WHT

BLK

FUSE 20A
GRN
120 V AC. GND 60 Hz

CONTROL UNIT N.O.

COM.

A1

B1

RY3

RY4

A3

A5

OVEN LAMP RELAY
RY1

RY2
SECONDARY INTERLOCK RELAY

N.O.

COM.

DOOR SENSING SWITCH B2
F1 F2
F3

HOOD LAMP

HL

HL

OL

TTM

FM

AH SENSOR

SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY.
POWER TRANSFORMER
HIGH VOLTAGE CAPACITOR 1.0µF/ AC2300V
HIGH VOLTAGE RECTIFIER

MAGNETRON

OVEN LAMP TURNTABLE MOTOR
FAN MOTOR MONITOR SWITCH

PRIMARY INTERLOCK SWITCH
Figure O-1. Oven Schematic-Off Condition

CAVITY

MAGNETRON

TEMPERATURE FUSE TEMPERATURE FUSE

SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. COOKING TIME PROGRAMMED. 3. VARIABLE COOKING CONTROL “HIGH”. 4. “START” BUTTON PRESSED.

MAGNETRON

WHT

BLK

FUSE 20A
GRN
120 V AC. GND 60 Hz

CONTROL UNIT N.O.

COM.

A1

B1

RY3

RY4

A3

A5

OVEN LAMP RELAY
RY1

RY2
SECONDARY INTERLOCK RELAY

N.O.

COM.

DOOR SENSING SWITCH B2
F1 F2
F3

HOOD LAMP

HL

HL

OL

TTM

FM

AH SENSOR

POWER TRANSFORMER
HIGH VOLTAGE CAPACITOR 1.0µF/ AC2300V
HIGH VOLTAGE RECTIFIER

OVEN LAMP TURNTABLE MOTOR
FAN MOTOR MONITOR SWITCH

PRIMARY INTERLOCK SWITCH
Figure O-2. Oven Schematic-Cooking Condition
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R-1210 R-1211

TROUBLESHOOTING GUIDE

Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.

When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the “Test Procedure “section.

IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1) secondary interlock relay (RY2), door sensing switch and primary interlock switch before replacing the monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA016/KiT as an assembly.
IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases, be necessary to connect the power supply cord after the outer case has been removed, in this event, 1. Disconnect the power supply cord, and then remove
outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor.

4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord. When the testing is completed 1. Disconnect the power supply cord, and then remove
outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Reconnect the leads to the primary of the power
transformer. 5. Reinstall the outer case (cabinet). 6. Reconnect the power supply cord after the outer case is
installed. 7. Run the oven and check all functions.

TEST PROCEDURE

J O CK

POSSIBLE CAUSE AND
DEFECTIVE PARTS

CONTROL UNIT AH SENSOR SHORTED OR OPENED WIRING

CONDITION

PROBLEM

The oven stops and “ERROR” is displayed or does not end during Sensor Cooking

SENSOR COOKING

condition. (Oven does not shut off after a cup of water is boiling by Sensor Cooking.)

CONDITION Oven stops at 16 seconds after starting.

NOTE: For additional troubleshooting procedures, please refer back to the R-1200/1201 base model Service Manual.

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R-1210 R-1211

TEST PROCEDURES

PROCEDURE LETTER

COMPONENT TEST

J

TOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit, and also the Control Unit is divided into two units, LSI Unit and Power Unit, and troubleshooting by unit replacement is described according to the symptoms indicated. Before testing,

1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of ” REMOVAL OF OVEN FROM WALL ” and ” OUTER CASE REMOVAL “.
2. Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Disconnect the leads to the primary of the power transformer. 5) Ensure that these leads remain isolated from other components and oven chassis by using
   insulation tape. 1. Key Unit.
   NOTE ; 1) Check key unit ribbon connection before replacement. 2) Re-install the outer case (cabinet). 3) Reconnect the power supply cord after the outer case is installed. 4) Run the oven and check all functions.
   The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. If the key unit is defective, replace the key unit. 2. Control Unit. The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure K) to determine if control unit is faulty. 2-1 In connection with pads.
   a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal. 2-2 In connection with indicators a) At a certain digit, all or some segments do not light up. b) At a certain digit, brightness is low. c) Only one indicator does not light. d) The corresponding segments of all digits do not light up; or they continue to light up. e) Wrong figure appears. f) A certain group of indicators do not light up. g) The figure of all digits flicker. 2-3 Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible. When testing is completed, 1) Disconnect the power supply cord. 2) Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Reconnect all leads removed from components during testing. 5) Re- install the outer case (cabinet). 6) Reconnect the power supply cord after the outer case is installed. 7) Run the oven and check all functions.

K

KEY UNIT TEST

1. Disconnect the power supply cord.

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R-1210 R-1211

TEST PROCEDURES

PROCEDURE LETTER

COMPONENT TEST

2. Open the door and block it open. 3. To discharge high voltage capacitor, wait for 60 seconds. 4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
is making good contact, verify that the door sensing switch operates properly; that is the contacts are closed when the door is closed and open when the door is open. If the door sensing switch is good, disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the door sensing switch is closed (either close the door or short the door sensing switch connecter). Use the Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. 5. Reconnect all leads removed from components during testing. 6. Re-install the outer case cabinet. 7. Reconnect the power supply cord. 8. Run the oven and check all functions.

G12 G11 G10 G 9

G 8

G 7

G 6

G 5

G 4

G 3

G 2

G 1

5

4

3

2

1

POWER LEVEL

TIMER CLOCK

0

9

8

7

6

STOP

START

CLEAR MINUTE PLUS

BEVERAGE

HOT WATER

FRESH FROZEN ROLLS / ROLLS / MUFFINS MUFFINS

DEFROST BAKED

FRESH

CENTER POTATOES VEGETABLES

SENSOR COOK
CENTER

POPCORN

SENSOR REHEAT

TASK LIGHT
KEEP WARM PLUS

ACCENT LIGHT
CUSTOM HELP

L

RELAY TEST

1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of ” REMOVAL OF OVEN FROM WALL ” and ” OUTER CASE REMOVAL “.
2. Open the door and block it open. 3. To discharge high voltage capacitor, wait for 60 seconds. 4. Disconnect the leads to the primary of the power transformer. 5. Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape. 6. After that procedure, re-connect the power supply cord. 7. Check voltage between normal open terminal of the relay RY2 and the normal open terminal of the
relay RY1 on the control unit with an A.C. voltmeter. The meter should indicate 120 volts, if not check oven circuit. RY1, RY2, RY3 and RY4 Relay Test These relays are operated by D.C. voltage Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated …………….Defective relay. DC. voltage not indicated ………. Check diode which is connected to the relay coil. If diode is good,
control unit is defective.

RELAY SYMBOL RY1 RY2(COOK) RY3 RY4

OPERATIONAL VOLTAGE Approx. -26.3V D.C. Approx. -25.3V D.C. Approx. -26.3V D.C. Approx. -26.3V D.C.

CONNECTED COMPONENTS Oven lamp / Fan motor / Turntable motor Power transformer Hood lamp Hood lamp

8. Disconnect the power supply cord. 9. Open the door and block it open.

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R-1210 R-1211

TEST PROCEDURES

PROCEDURE LETTER

COMPONENT TEST

10.To discharge high voltage capacitor, wait for 60 seconds. 11.Reconnect all leads removed from components during testing. 12.Re-install the outer case (cabinet). 13.Reconnect the power supply cord after the outer case is installed. 14.Run the oven and check all functions.

M

DEFROST CENTER TEST

(1) Open the door. (2) Place one cup of water in the center of the turntable tray in the oven cavity. (3) Close the door. (4) Touch the ” DEFROST CENTER ” pad. And touch the number pad 2. Then touch the number pad 5. (5) Touch the ” START ” pad. (6) The oven is in Defrost center cooking condition. (7) The oven will operate as follows.

Menu

1ST STAGE

2ND STAGE

Steaks/Chops LEVEL TIME LEVEL TIME

0.5lbs

60% 57sec. 40% 17sec.

(8) If improper operation is indicated, the control unit is probably defective and should be checked.

N

FOIL PATTERN ON THE PRINTED WIRING BOARD TEST

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs.

1. Disconnect the power supply cord. 2) Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Remove the power unit, referring to the procedure of ” RIGHT PANEL ASSEMBLY AND POWER
   UNIT REMOVAL “. 5) Follow the troubleshooting guide given below for repair.

STEPS
1 2

OCCURRENCE
Only pattern at “a” is broken. Pattern at “a” and “b” are broken.

CAUSE OR CORRECTION
Insert jumper wire J1 and solder. Insert the coil RCILF2003YAZZ between “c” and “d”.

6. Make a visual inspection of the varistor. Check

1

T1

3

VRS1

for burned damage and examine the

transformer with a tester for the presence of

layer short-circuit (check the primary coil

resistance which is approximately 780 ±

10%). If any abnormal condition is detected,

replace the defective parts.

7. Reconnect all leads removed from

RY1

components during testing.

8. Re-install the power unit to the right panel

a

d

RY2

c (J1)

b

and re-install the right panel to the oven.

9. Reconnect the power supply cord.

10. Run the oven and check all functions.

2. Follow the troubleshooting guide given below, if indicator does not light up after above check and

repairs are finished.

1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of ”

REMOVAL OF OVEN FROM WALL ” and ” OUTER CASE REMOVAL “.

10

PROCEDURE LETTER

R-1210 R-1211

TEST PROCEDURES

COMPONENT TEST

2. Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Disconnect the leads to the primary of the power transformer. 5) Ensure that these leads remain isolated from other components and oven chassis by using
   insulation tape. 6) After that procedure, re-connect the power supply cord. 7) Follow the troubleshooting guide given below for repair.

STEPS

OCCURRENCE

CAUSE OR CORRECTION

The rated AC voltage is not present between

1

the normal open terminal of the relay RY2 and Check supply voltage and oven power cord.

the normal open terminal of the relay RY1.

2

The rated AC voltage is present at primary side of low voltage transformer.

Low voltage transformer or secondary circuit defective. Check and repair.

8. Disconnect the power supply cord. 9) Open the door and block it open. 10) To discharge high voltage capacitor, wait for 60 seconds. 11) Reconnect all leads removed from components during testing. 12) Re-install the outer case (cabinet). 13) Reconnect the power supply cord after the outer case is installed. 14) Run the oven and check all functions.

O

AH SENSOR TEST

Checking the initial sensor cooking condition WARNING : The oven should be fully assembled before following procedure. (1) The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95°F (35°C). (3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS” of the operation manual. (4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To permit adequate ventilation, be sure to install so as not to block these vents. There should be some space for air circulation. (5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel. (6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature. (7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given of by the spray and turn off before food is properly cooked. (8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test WARNING : The oven should be fully assembled before following procedure. Make sure the oven has been plugged in at least two minutes before checking sensor cook operation. The cabinet should be installed and screws tightened. (1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. (2) Place the container on the center of tray in the oven cavity. (3) Close the door. (4) Touch the TIMER/CLOCK once, the POWER LEVEL pad twice, the START pad once, the number
pad 1 once and the number pad 4 once. Now, the oven is in the sensor cooking condition, and ” AH20 “, ” SENSOR ” and ” COOK ” will appear in the display. (5) The oven will operate for the first 16 seconds, without generating microwave energy. NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of
sensor cooking.

11

R-1210 R-1211

TEST PROCEDURES

PROCEDURE LETTER

COMPONENT TEST

(6) After approximately 16 seconds, microwave energy is produced. If ERROR is displayed or the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below. If the oven stops after 5 minutes and ERROR is displayed, the AH sensor is normal. Check other parts except the AH sensor.

TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor. (1) Disconnect the power supply cord, and then remove outer case. (2) Open the door and block it open. (3) Discharge high voltage capacitor. (4) Remove the AH sensor. (5) Install the new AH sensor. (6) Reconnect all leads removed from components during testing. (7) Re-install the outer case (cabinet). (8) Reconnect the power supply cord after the outer case is installed. (9) Reconnect the oven to the power supply and check the sensor cook operation as follows:
9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. 9-2. Place the container on the center of tray in the oven cavity. 9-3. Close the door. 9-4. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice, the START pad once, the
number pad 1 once and the number pad 4 once. 9-5. The control panel is in automatic Sensor operation. 9-6. The oven turns off automatically, and the time for detecting moisture will be displayed. If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below.
CHECKING CONTROL UNIT
(1) Disconnect the power supply cord, and then remove outer case. (2) Open the door and block it open. (3) Discharge high voltage capacitor. (4) Disconnect the sensor connector that is mounted to control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel. (6) Disconnect the leads to the primary of the power transformer. (7) Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape. (8) After that procedure, re-connect the power supply cord. (9) Check the sensor cook operation proceed as follows:
9-1. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice, the START pad once and the number pad 1 once and the number pad 4 once. 9-2. The control panel is in the sensor cooking operation.
9-3. After approximately 19 seconds, push plunger of select switch for more than 3 seconds. This condition is same as judgement by AH sensor.
9-4. After approximately 3 seconds, the display shows ” X X . X X ” which is the time for detecting moisture.
If the above is not the case, the control unit is probably defective. If the above is proper, the AH sensor is probably defective. (10) Disconnect the power supply cord, and then remove outer case. (11) Open the door and block it open. (12) Discharge high voltage capacitor. (13) Disconnect the dummy resistor circuit from the sensor connector of control panel. (14) Carry out necessary repair. (15) Reconnect all leads removed from components during testing and repairing. (16) Re-install the outer case (cabinet).

12

R-1210 R-1211

TEST PROCEDURES

PROCEDURE LETTER

COMPONENT TEST

(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.
(18) Carry out “Water load cooking test” again and ensure that the oven works properly.

Plunger

R1, R2 : 22 ± 1% 1/2W

R3 : 4.3k ± 5% 1/4W

To connector (F)

R4 : 1M ± 5% 1/4W

on Control Unit.

NC NO
COM

1

F-1

2

F-2

3

F-3

CONNECTOR

R1 R2 R3 R4

COM NO NC

Sensor Dummy Resistor Circuit

13

R-1210 R-1211
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL

The touch control section consists of the following units as shown in the touch control panel circuit.

(1) Key Unit (2) Control Unit (The Control unit consists of LSI Unit and
Power U nit)

The principal functions of these units and the signals communicated among them are explained below.

Key Unit The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P20, P21, P22, P23, P24, P25, P26 and P27. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P43, P44, P45 and P46 to perform the function that was requested.

Control Unit Control unit consists of LSI, power source circuit, synchronizing signal circuit, reset circuit, buzzer circuit, relay circuit indicator circuit, back light circuit and absolute humidity sensor circuit.

1. LSI This LSI controls the key strobe signal, relay driving signal for oven function and indicator signal.

2. Power Source Circuit This circuit generates voltages necessary for the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit.

Symbol VC

Voltage -5.3V

Application LSI(IC1)

3. Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It incorporates a very small error because it works on commercial frequency.
4. Reset Circuit A circuit to generate a signals which resetting the LSI to the initial state when power is applied.
5. Buzzer Circuit The buzzer is responds to signals from the LSI to emit audible sounds (key touch sound and completion sound).
6. Door Sensing Switch A switch to inform the LSI if the door is open or closed.
7. Relay Circuit To drive the magnetron, fan motor, turntable motor and light the oven lamp and hood lamp.
8. Indicator Circuit This circuit consists of 25 segments and 4 common electrodes using a Light Crystal Display.
9. Back Light Circuit A circuit to drive the back light (Light emitting diodes LD1-LD4).
10. Absolute Humidity Sensor Circuit This circuit detects moisture of the cooking food to allow its automatic cooking.

14

R-1210 R-1211

DESCRIPTION OF LSI

LSI The I/O signal of the LSI is detailed in the following table.

Pin No. Signal

I/O

1-2 VL2-VL1 IN

3-6 AN7-AN4 IN

7

AN3

OUT

8

AN2

IN

9

AN1

IN

10

AN0

IN

11-13 14

P57-P55 OUT CNTR0 OUT

15

P53

OUT

16

P52

OUT

Description

Power source voltage input terminal. Standard voltage for LCD.

Terminal to change cooking input according to the Model. By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation is applied to set up its cooking constant.

Back light circuit (Light emitting diodes) driving signal.

To input signal which communicates the door open/close information to LSI. Door close “H” level signal (0V). Door open “L” level signal (-5V).

AH sensor input.. This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI. Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI.

Used for initial balancing of the bridge circuit (absolute humidity sensor).

Signal to sound buzzer (2.0 kHz). A: key touch sound. B: Completion sound.

0.1 sec. A
2.0 sec. B

H : GND L : -5V H : GND L : -5V

Used for initial balancing of the bridge circuit (absolute humidity sensor).

Oven lamp, fan motor and turntable motor driving signal

To turn on and off shut off relay (RY1). The square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit.

16.7 msec. During cooking

H : GND L : -5V

17

P51

OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).

18

P50

OUT Terminal not used.

19

P47

OUT Magnetron high-voltage circuit driving signal.

OFF
To turn on and off the cook relay (RY2). The

H : GND

signals holds “L” level during microwave

Maximum output

ON

cooking and “H” level while not cooking. In

L : -5V

other cooking modes (variable cooking) the

OFF

OFF

signal turns to “H” level and “L” level in repetition according to the power level.

70% of maximum output

24 sec. ON

8 sec.

H : GND L : -5V

20

P46

IN Signal coming from touch key.

When either G12 line on key matrix is touched, a corresponding signal out of P20 – P27

will be input into P46. When no key is touched, the signal is held at “H” level.

21

P45

IN Signal similar to P46.

When either G11 line on key matrix is touched, a corresponding signal will be input into P45.

22

P44

IN Signal similar to P46.

When either G10 line on key matrix is touched, a corresponding signal will be input into P44.

23

P43

IN Signal similar to P46.

When either G9 line on key matrix is touched, a corresponding signal will be input into P43.

24

INT0

IN Signal synchronized with commercial power source frequency.

This is the basic timing for time processing of LSI. H : GND

16.7 msec.

L : -5V

15

R-1210 R-1211

Pin No. 25 26 27

Signal P41 P40
RESET

28-29 30

P71-P70 XIN

31

XOUT

32

VSS

33

P27

34

P26

35

P25

36

P24

37

P23

38

P22

39

P21

40

P20

41

P17

42

P16

43

P15

44

P14

45-47 P13-P11

I/O OUT
IN IN OUT IN
OUT IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT

Description
Terminal not used.
Connected to GND through the pull-down resistor R100.
Auto clear terminal. Signal is input to reset the LSI to the initial state when power is applied.
Terminal not used.
Internal clock oscillation frequency input setting. The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal.
Internal clock oscillation frequency control output. Output to control oscillation input of XIN.
Power source voltage: -5.0V. VC voltage of power source circuit input.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G8 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G7 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G6 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G5 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G4 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G3 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G2 line keys on key matrix is touched.
Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G1 line keys on key matrix is touched.
Hood lamp driving signal. To turn on and off relay(RY6). “L” level: During Hood lamp ON. “H” level: During Hood lamp OFF.
Hood lamp driving signal. To turn on and off relay(RY5). “L” level: During Hood lamp ON. “H” level: During Hood lamp OFF.
Hood motor high / low driving signal. To turn on and off relay(RY3). “L” level: During Hood motor high. “H” level: During Hood motor low.
Hood motor driving signal. To turn on and off relay(RY4). “L” level: During Hood motor ON. “H” level: During Hood motor OFF.
Terminal not used.

16

R-1210 R-1211

Pin No. Signal

I/O

48-72 SEG24-SEG0 OUT

73/74 75 76 77 78 79 80

VCC/VREF AVSS COM3 COM2 COM1 COM0 VL3

IN IN OUT OUT OUT OUT IN

Description

Segment data signal. Connected to LCD.

The relation between signals are as follows:

LSI signal (Pin No.) LCD (Pin No.) SEG 24 (48) —————- SEG24 (29) SEG 23 (49) —————- SEG23 (28) SEG 22 (50) —————- SEG22 (27) SEG 21 (51) —————- SEG21 (26) SEG 20 (52) —————- SEG20 (25) SEG 19 (53) —————- SEG19 (24) SEG 18 (54) —————- SEG18 (23) SEG 17 (55) —————- SEG17 (22) SEG 16 (56) —————- SEG16 (21) SEG 15 (57) —————- SEG15 (20) SEG 14 (58) —————- SEG14 (19) SEG 13 (59) —————- SEG13 (18) SEG 12 (60) —————- SEG12 (17)

LSI signal (Pin No.)

LCD (Pin No.)

SEG 11 (61) —————— SEG11 (16)

SEG 10 (62) —————— SEG10 (15)

SEG 9 (63) —————— SEG 9 (14)

SEG 8 (64) —————— SEG 8 (13)

SEG 7 (65) —————— SEG 7 (12)

SEG 6 (66) —————— SEG 6 (11)

SEG 5 (67) —————— SEG 5 (10)

SEG 4 (68) —————— SEG 4 ( 9)

SEG 3 (69) —————— SEG 3 ( 8)

SEG 2 (70) —————— SEG 2 ( 7)

SEG 1 (71) —————— SEG 1 ( 6)

SEG 0 (72) —————— SEG 0 ( 5)

Connected to GND.

Connected to VC.

Common data signal.

Connected to LCD signal COM4.

Common data signal.

Connected to LCD signal COM3.

Common data signal.

Connected to LCD signal COM2.

Common data signal.

Connected to LCD signal COM1.

Power source voltage input terminal.

Standard voltage for LCD.

17

R-1210 R-1211
ABSOLUTE HUMIDITY SENSOR CIRCUIT

(1) Structure of Absolute Humidity Sensor

The absolute humidity sensor includes two thermistors

as shown in the illustration. One thermistor is housed in

the closed vessel filled with dry air while another in the

open vessel. Each sensor is provided with the protective

cover made of metal mesh to be protected from the

external airflow.

Thermistors

ventilation opening for sensing

Sensing part (Open vessel)

Sensing part (Closed vessel)

(2) Operational Principle of Absolute Humidity Sensor The figure below shows the basic structure of an absolute humidity sensor. A bridge circuit is formed by two thermistors and two resistors (R1 and R2). The output of the bridge circuit is to be amplified by the operational amplifier. Each thermistor is supplied with a current to keep it heated at about 150°C (302°F), the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit, the intensity of which is increased as the absolute humidity of the air increases. Since the output is very minute, it is amplified by the operational amplifier.

Output voltage

Operational

C

R1 amplifier

Output

voltage

Absolute humidity vs, output voltage characteristic

S R2 R3

S : Thermistor open vessel
C : Thermistor closed vessel

Absolute humidity (g/m 2)

(3) Detector Circuit of Absolute Humidity Sensor Circuit This detector circuit is used to detect the output voltage of the absolute humidity circuit to allow the LSI to control sensor cooking of the unit. When the unit is set in the sensor cooking mode, 16 seconds clearing cycle occurs than the detector circuit starts to function and the LSI observes the initial voltage available at its AN1 terminal. With this voltage given, the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R53 ~ R57. Changing the resistance values results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AN0 terminal of the LSI. The voltage of AN1 terminal will indicate about -2.5V. This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode. As the sensor cooking proceeds, the food is heated to generate moisture by which the

resistance balance the bridge circuit is deviated to increase the voltage available at AN1 terminal of the LSI. Then the LSI observes that voltage at AN1 terminal and compares it with its initial value, and when the comparison rate reaches the preset value (fixed for each menu to be cooked), the LSI causes the unit to stop sensor cooking; thereafter, the unit goes in the next operation automatically. When the LSI starts to detect the initial voltage at AN1 terminal 16 seconds after the unit has been put in the Sensor Cooking mode, if it is not possible to balance, of the bridge circuit due to disconnection of the absolute humidity sensor, ERROR will appear on the display and the cooking is stopped.

1. Absolute humidity sensor circuit

C. Thermistor in closed vessel
S. Thermistor in open vessel

R53

620k

R54

300k

R55

150k

R56

75k

R57

37.4k

R52 47k

C51 C51 0.01uF 0.1uF

F-1

C

R52

F-3 3.57k

C50

S F-2

R51 3.32k

R53

1.8k

0.1 uF

R50

IC2

15k

R54 360k

R51 47k
D50

C50 0.01uF

11

SW1 P57

12

SW2

P56

13

SW3

P55

17

SW4 P51

15

SW5 P53

10 AN0
LSI (IC1)

9 AN1

330

R50

VA : -15V

VA : -15V VC : -5V

18

R-1210 R-1211

SERVICING

1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electricity charge in clothes, etc. and sometimes it is not fully protected by the built- in protection circuit. In order to protect CMOS LSI.

1. When storing and transporting, thoroughly wrap them in aluminium foil. Also wrap all PW boards containing them in aluminium foil.
2. When soldering, ground the technician as shown in the figure and use grounded soldering iron and work table.
   approx. 1M ohm

2. Shapes of Electronic Components

Transistor 2SB1238

Transistor KRA101M

B C E

KRC243M
E CB

3. Servicing of Touch Control Panel

We describe the procedures to permit servicing of the

touch control panel of the microwave oven and the

precautions you must take when doing so. To perform

the servicing, power to the touch control panel is available

either from the power line of the oven itself or from an

external power source.

(1) Servicing the touch control panel with power supply

of the oven:

CAUTION:

THE HIGH VOLTAGE TRANSFORMER OF THE

MICROWAVE OVEN IS STILL LIVE DURING

SERVICING AND PRESENTS A HAZARD.

Therefore, before checking the performance of the touch

control panel,

1. Disconnect the power supply cord, and then remove

outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the leads to the primary of the power

transformer.

5. Ensure that these leads remain isolated from other

components and oven chassis by using insulation

tape.

6. After that procedure, re-connect the power supply

cord.

After checking the performance of the touch control panel,

1. Disconnect the power supply cord.

2. Open the door and block it open.

3. Re-connect the leads to the primary of the power

transformer.

4. Re-install the outer case (cabinet). 5) Re-connect the power supply cord after the outer
   case is installed. 6) Run the oven and check all functions. A. On some models, the power supply cord between the touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven. B. On some models, the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other. For those models, it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper; in this case you must short both ends of the door sensing switch (on PWB) of the touch control panel with a jumper, which activates an operational state that is equivalent to the oven door being closed. As for the sensor-related controls of the touch control panel, checking them is possible if dummy resistor(s) with resistance equal to that of the controls are used. (2) Servicing the touch control panel with power supply from an external power source: Disconnect the touch control panel completely from the oven proper, and short both ends of the door sensing switch (on PWB) of the touch control panel, which activates an operational state that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control panel, then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor-related controls of the touch control panel by using the dummy resistor(s).
   4. Servicing Tools Tools required to service the touch control panel assembly.
5. Soldering iron: 30W (It is recommended to use a soldering iron with a grounding terminal.)
6. Oscilloscope: Single beam, frequency range: DC-10MHz type or more advanced model.
7. Others: Hand tools
   5. Other Precautions 1) Before turning on the power source of the control unit,
   remove the aluminium foil applied for preventing static electricity. 2) Connect the connectors of the key unit to the control unit being sure that the lead wires are not twisted. 3) After aluminium foil is removed, be careful that abnormal voltage due to static electricity etc. is not applied to the input or output terminals. 4) Attach connectors, electrolytic capacitors, etc. to PWB, making sure that all connections are tight. 5) Be sure to use specified components where high precision is required.

19

R-1210 R-1211
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING AGAINST HIGH VOLTAGE:

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..

WARNING:

Avoid possible exposure operating the oven.

to

microwave

energy.

Please

follow

the

instructions

below

before

1. Disconnect the power supply cord. 2. Make sure that a definite” click” can be heard when the
microwave oven door is unlatched. (Hold the door in a closed position with one hand, then push the door open button with the other, this causes the latch leads to rise, it is then possible to hear a “click’ as the door switches operate.) 3. Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before operating the oven. Do not operate the oven if any of the following conditions exist;

1. Door does not close firmly. 2. Door hinge, support or latch hook is damaged. 3. The door gasket or seal is damaged. 4. The door is bent or warped. 5. There are defective parts in the door interlock system. 6. There are defective parts in the microwave generating
and transmission assembly. 7. There is visible damage to the oven.
Do not operate the oven: 1. Without the RF gasket (Magnetron). 2. If the wave guide or oven cavity are not intact. 3. If the door is not closed. 4. If the outer case (cabinet) is not fitted.

WARNING FOR WIRING

To prevent an electric shock, take the following precautions. 1. Before wiring,

1. Disconnect the power supply cord. 2) Open the door block it open. 3) Discharge the high voltage capacitor and wait for 60
   seconds. 2. Don’t let the wire leads touch to the followiong parts;

2. High voltage parts: Magnetron, High voltage transformer, High voltage capacitor and High voltage rectifier assembly.

3. Hot parts: Oven lamp, Magnetron, Power transformer and Oven cavity.

4. Sharp edge: Bottom plate, Oven cavity, Waveguide flange, Chassis support and other metallic plate.

5. Movable parts (to prevent a fault) Fan blade, Fan motor, Switch, Open lever, Open button.
   3. Do not catch the wire leads in the outer case cabinet. 4. Insert the positive lock connector until its pin is locked
   and make sure that the wire leads do not come off even if the wire leads are pulled. 5. To prevent an error function, connect the wire leads correctly, referring to the Pictorial Diagram.

THE FOLLOWING ADJUSTMENTS OR COMPONENT REPLACEMENT CAN BE PERFORMED WITHOUT REMOVING THE OVEN FROM THE WALL

1. Hood lamps, hood lamp sockets and oven lamp. 2. Base cover and hood lamp glass assembly.

3. Turntable motor. 4. Right panel parts.

AH SENSOR REMOVAL

1. Disconnect the power supply cord, remove the oven from wall, and remove outer case. (Refer to procedure of “REMOVAL OF OVEN FROM WALL” AND “OUTER CASE REMOVAL”.) And proceed as follows.

2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60
seconds. 4. Disconnect the connector CN-F of AH sensor from the
power unit.

20

5. Remove the two (2) screws and one (1) washer holding the AH sensor to the exhaust duct.
6. Release the wire lead of AH sensor from the ditch of the exhaust duct.
7. Now, the AH sensor is free.

Screw Sensor ground wire

R-1210 R-1211

Screws

AH sensor Ditch

Exhaust duct

Wire lead of AH sensor

Hole

RIGHT PANEL ASSEMBLY AND POWER UNIT REMOVAL

1. Disconnect the power supply cord. 2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60
seconds. 4. Remove one (1) screw holding the right panel to the oven
cavity front face plate. 5. Release the right panel from the oven cavity front face
plate by lifting it up. 6. Disconnect the wire leads from the relays RY1 and RY2.

7. Disconnect the connectors CN-A, CN-B, CN-C and CNF from the power unit.
8. Remove the right panel assembly from the oven. 9. Now, the right panel assembly is free. 10.Remove the two (2) screws holding the power unit to
the right panel. 11.Release the two (2) tabs holding the power unit to the
right panel. 12.Now, the power unit is free.

OVEN LAMP REMOVAL

1. Disconnect the power supply cord. 2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60
seconds. 4. Release the right panel assembly, referring to items 4 to
5 of “RIGHT PANEL ASSEMBLY AND POWER UNIT REMOVAL”. ( It is not necessary to disconnect any

connectors or wire leads from the power unit. 5. Release the oven lamp socket from the magnteron duct
by turning the socket counterclockwise. 6. Remove the oven lamp from the socket by turning the
oven lamp. 7. Now the oven lamp is free.

OVEN LAMP SOCKET REMOVAL

1. Disconnect the power supply cord and remove the oven from wall and remove outer case. (Refer to procedure of “Removal of Oven from Wall” and “Outer case Removal”)
2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60
seconds. 4. Turn the lamp socket and release it from the magnetron
duct. 5. Screw the oven lamp off from the lamp socket. 6. Now, the oven lamp is free. 7. Pull the wire leads from the oven lamp socket by pushing

the terminal hole of the oven lamp socket with the small flat type screw driver. 8. Now, the oven lamp socket is free.
Oven lamp socket
Terminal Wire lead
Terminal hole
Flat type small screw driver

DOOR REPLACEMENT

DOOR ASSEMBLY REMOVAL 1. Disconnect the power supply cord and remove the oven
from wall and remove outer case. (Refer to procedure of “Removal of Oven from Wall” and “Outer case Removal”) 2. Open the door and block it open.

3. To discharge the high voltage capacitor, wait for 60 seconds.
4. Disconnect the 11-pin wire harness from the power unit. 5. Release a snap band of the 11-pin wire harness from the
hole on the base plate R.

21

R-1210 R-1211
6. Remove the two (2) screws holding the bottom sash to the oven cavity front face plate.
7. Remove the bottom sash with 11-pin wire harness from the oven cavity front face plate. And remove the connecter of the 11-pin wire harness from the long hole of the oven cavity front face plate.
8. Remove the 11-pin wire harness from the bottom sash. 9. Insert a putty knife (thickness of about 0.5mm) into the
gap A between the upper door stopper and the choke cover as shown in Figure C-4 to free engaging parts. 10.Lift up the upper door stopper. 11.Remove the lower door stopper from the door assembly in a similar way which the upper door stopper is removed. 12.Now, the upper and lower door stoppers are free from the door assembly. 13.Lift up the door assembly to release the upper and lower door hinge pins from the upper and lower oven hinges. 14.Now, the door assembly is free.
Note: When the individual parts are replaced, refer to “Door Disassembly”.
DOOR ASSEMBLY REINSTALL 1. On reinstalling door, insert the lower oven hinge to lower
door hinge pin. 2. Insert the upper oven hinge to the upper door hinge pin. 3. Shut the door (close the contacts of interlock switches). 4. Make sure upper and lower oven hinges are inserted into
the upper an lower door hinge pins. 5. Make sure the door is parallel with oven face lines (left
and upper side lines) and door latch heads pass through latch holes correctly. 6. Reinstall the upper and lower door stoppers to the door assembly. 7. Reinstall the 11-pin wire harness into the bottom sash. The 11-pin wire harness should be held by three (3) tabs on the bottom sash. And the marking portion on the 11-pin wire harness should be held by left tab as shown in Figure C-3. 8. Insert the connector of the 11-pin wire harness into the long hole of the oven cavity front face plate. And reinstall the bottom sash to the oven cavity front face plate with the two (2) screws. 9. Reconnect the 11-pin wire harness to the power unit. 10. Insert the snap band of the 11-pin wire harness into the hole on the base plate R.
Note: After any service to the door;
(A) Make sure that door sensing switch and primary interlock switch are operating properly. (Refer to chapter “Test Procedures”.)
(B) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards.

After any servicing, make sure of the following : 1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of latch hole. 2. Deviation of door alignment from horizontal line of cavity face plate is to be less than 1.0mm. 3. Door is positioned with its face pressed toward cavity face plate. 4. Reinstall outer case and check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)

Note: The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be air-tight, moisture (condensation)-tight or light-tight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves indicate a leakage of microwave energy from oven cavity.

Upper door hinge pin

RE-INSTALL

Lower oven hinge

Upper oven hinge

Door assembly

Latch heads

Upper door stopper

Lower door stopper

Lower door hinge pin

Bottom sash

11-pin wire harness

RE-INSTALL

Figure C-2. Door Replacement and adjustment
Screw

Door assembly

Oven cavity front face plate
Marking

Tabs Bottom sash

Screw
Connector 11-pin wire harness

Figure C-3. 11-pin wire harness and bottom sash

DOOR DISASSEMBLY

1. Disconnect the power supply cord. 2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60
seconds.

4. Remove door assembly, referring to “DOOR REPLACEMENT”. Replacement of door components are as follows:
5. Place door assembly on a soft cloth with latches facing up.

22

Note: As the engaging part of choke cover and door frame are provided at 15 places, do not force any particular part.
CHOKE COVER 6. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown Figure C-4 to free engaging parts. 7. Pry the choke cover by inserting a putty knife in order shown in Figure C-4. 8. Now choke cover is free from door panel and door frame.
NOTE: When carrying out any repair to the door, do not bend or warp the slit choke (tabs on the door panel assembly) to prevent microwave leakage.
DOOR FRAME ASSEMBLY 9. Remove four (4) screws holding the door panel to the
door frame assembly. 10.Release the door panel from the door frame assembly. NOTE: It is easier to release the engaging parts of the upper
or lower door hinge pin side at first. 11.Now, door frame assembly is free.
LATCH SPRING, LATCH HEAD AND DOOR PANEL 12.Release the latch spring from the tab of the latch head
and tab of the door frame. 13.Release the latch head from the door frame. 14.Now, the latch spring and latch head are free.

Choke cover

Upper door stopper A
Lower door stopper

Putty knife
Door frame
Figure C-4. Door Disassembly
LSI UNIT 9. Remove the two (2) screws holding the PWB cover to
the door frame assembly. 10.Remove the PWB cover from the door frame assembly. 11.Disconnect the ribbon cable of the key unit from the LSI
unit. 12.Releasing the two (2) lower tabs, remove the LSI unit
with the LCD holder from the door frame assembly. 13.Disconnect the 11-pin wire harness from the LSI unit. 14.Releasing the two (2) tabs, release the LCD from the
LCD holder.

R-1210 R-1211

15.Releasing the four (4) tabs, remove the LCD holder from the LSI unit.
16.Now the LSI unit is free.
NOTE: For 11-pin wire harness 1. When the PWB cover is reinstalled, route the 11-pin wire harness under the hole of the PWB cover as shown in Figure C-5. 2. Before the door panel is reinstalled to the door frame assembly, make sure that the 11-pin wire harness is held by the two (2) tabs and one (1) hole on the door frame as shown in Figure C-5. And the marking portion on the 11-pin wire harness should be held by right tab on the door frame as shown in Figure C-5.

Screws

PWB cover Cushion

TabMarking

Hole Tabs

11-pin wire harness
LSI unit

11-pin wire harness

Tab Tab

Tab

Tab

Door frame

Hole

Figure C-5. Door frame assembly

NOTE: For key unit 1. Before attaching a new key unit, wipe off remaining adhesive on the door frame surfaces completely with a soft cloth soaked in alcohol. 2. When attaching the key unit to the door frame, adjust the upper edge and left edge of the key unit to the correct position of door frame. 3. Stick the key unit firmly to the door frame by rubbing with soft cloth not to scratch.

NOTE: For LSI unit Handle the LSI unit carefully so that the ribbon cable does not come off. Because the ribbon cable is glued on the LCD and the printed wiring board only by heated paste.

Ribbon cable

Liquid Crystal Display (LCD) Printed wiring board
of LSI unit

Figure C-6. LSI unit

23

A

B

C

D

E

F

G

H

R-1210 R-1211

1

1

2

2

3

3

CN-F 1 BLK 2 RED 3 WHT

AH SENSOR

N.O. RED

COM.

GRN

DOOR SENSING SWITCH

CN-C PNK 11 BLK 10 WHT 9 GRY 8 PPL 7 BLU 6 GRN 5 YLW 4 ORG 3 RED 2 BRN 1

GRY GRY
WHT WHT
BLK BLK RED
R E D

1 CN-B
2
RY1

POWER UNIT

1

3

CN-F

COM.

CN-C 11

N.O.

1 N.O.

COM.

T1

RY2:

RY2: SECONDARY INTERLOCK RELAY

5 RY4

1

CN-A

RY3

1 RED 2 GRN CN-B
RED N.C.
CN-A 1 RED 2 3 ORG 4 5 BRN

WHT WHT
COM. MONITOR SWITCH

11-PIN WIRE HARNESS

PRIMARY INTERLOCK SWITCH

COM.

N.O.

WHT WHT
GRY

1 LSI UNIT (on the door)
IC1 CN-G

2

1 CN-C 11

1 2 3 4 5 6 7 8 9 10 11 CN-C B R O Y G B P G W B P
R E R L R L P RH L N N D GWN U L Y T K K

RED RED

BLK FUSE & HOLDER

BLK WHT TURNTABLE MOTOR
GRN GRN

CAVITY TEMPERATURE FUSE

RED

RED

GRN

BLK 3 BLK WHT 2 WHT GRN 1 GRN

Power Supply cord 120V 60Hz

RED

BLK RED

Blue Marking
BLK
BLK
GRY
OVEN LAMP & SOCKET

MAGNETRON TEMPERATURE FUSE
WHT RED FAN MOTOR

to Base Plate Right

WHT

Blue Marking

BRN

WHT

ORG

WHT

HOOD LAMP & SOCKET

HOOD LAMP & SOCKET

HIGH VOLTAGE COMPONENTS
MAGNETRON
HIGH VOLTAGE WIRE A

RED WHT WHT

HIGH VOLTAGE CAPACITOR

POWER TRANSFORMER

HIGH VOLTAGE RECTIFIER

24

4

4

5

5

6

6

Figure S-1. Pictorial Diagram

A

B

C

D

E

F

G

H

R-1210 R-1211

1

2

3

4

5

6

A

A

T1 1

D1-D4

5

1N4002

D3

D1

CN-C C 1 GND

VRS1 10G471K

C1 0.1µ/50v C2 1000µ/35v R3 2.4k
ZD1 HZ16-1 C3 10µ/35v

d3

8 D4 D2

B

­

­

B

a

b

C

AC(N)

N.O

OVEN LAMP TURNTABLE MOTOR FAN MOTOR

COM

AC(H)

N.O

c RY1

(J1)

D21 1SS270A

Q1 2SB1238 R1 680 1w R5 680 1w ­+ C21 10µ/35v
Q21 KRC243M

C 2 VA

C 3 INT

OVEN LAMP

C

C 4 TURNTABLE MOTOR

FAN MOTOR

C 6 BUZZER

SP1 PKM22EPT
R4 3.3k

D22 1SS270A

MICRO

COM

RY2

D

HOOD LAMP A 3

Q22 KRA101M

C 5 MICRO
D

D23 1SS270A

HOOD LAMP

COMMON

A 1

RY3

C 7

HOOD LAMP

D24 1SS270A

E

HOOD LAMP A5

RY4 CN-A

B-2
DOOR SENSING SWITCH

D20 1SS270A D40 1SS270A

F

B-1

CN-B

R52

3.57kD

1/4w

IC2 BA4558

5

8 IC2

7

6

4

C 8

HOOD LAMP

E

DOOR C 9 SENSING
SWITCH
C11 AHR
F

C10 AHA

C51 0.1µ/50v

F-3 C50 0.1µ/50v

1/4w

3.32kD

R51

G

R53 1.8kF 1/4w R54 360kF 1/4w

G

R50 330 1w

F-2

F-1

NOTE : IF NOT SPECIFIED, 1/4W ± 5%

CN-F

H

H

Figure S-2. Power Unit Circuit

1

2

3

4

5

6

25

A

B

C

D

E

F

G

H

R-1210 R-1211

1

1

2

2

3

3

GND

CN-C C 1

CPU UNIT

C4 0.01µ/25v

Q2 2SA1037AK

R4 1k

R1 82 R2 4.7k

C2 47µ/16v C3 0.01µ/25v

C1 0.1µ/50v C10 0.1µ /50v

VA

C 2

INT

C 3

AHA

C10

AHR

C11

BUZZER

C 6

OVEN LAMP

TURNTABLE

MOTOR

C 4

FAN MOTOR

HOOD LAMP C 7

HOOD LAMP C 8

MICRO.

C 5

DOOR

SENSING

C 9

SWITCH

R5 15k

ZD1 UDZ4.3B

LD1 LD2 LD3 LD4

R3 4.7k +
­
Q1 2SA1037AK

R9 680 1/2w

D50 MA152WA

R10 15k C11 0.01µ/25v

Q10 DTA143EKA
Q30 DTA143EKA
Q21 DTA143EKA
C20 0.1µ/50v
F
Q22 DTA143EKA
G
Q23 DTA143EKA
R20 1k

R50 15k

R51 47k R52 47k

ABCDE

CF1 CSTS4.00MG03

R41 15k

R40 4.7k C40 0.01µ /25v

NOTE : IF NOT SPECIFIED, 1/16W ± 5%

R68 15k R69 15k R70 15k R71 15k

R57 37.4kF R56 75kF R55 150kF R54 300k R53 620k
C51 0.01µ/25v C50 0.01µ/25v

R75 270k R74 270k R73 270k R72 270k C63 330pF/50v C62 330pF/50v C61 330pF/50v C60 330pF/50v

(J11) 4.7k (J10) (J13) 4.7k (J12) (J15) 4.7k (J14)
(J17) (J16) 4.7k

R80 1M
R100 15k

R8 4.7k R7 4.7k R6 4.7k

LIQUID CRYSTAL DISPLAY

GND VC

COOK SENSOR LBS KG DEF HELP

COM1 COM2 COM3 COM4 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24

1

29

COM0 (IC1) COM1 (IC1) COM2 (IC1) COM3 (IC1)
SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24

COM1 (LCD) COM2 (LCD) COM3 (LCD) COM4 (LCD)

80 VL3 COM0 COM1 COM2 COM3 75 AVSS VREF VCC SEG0 SEG1 70 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7
65

1

VL2

VL1 AN7 AN6 AN5 5 AN4

AN3

AN2

AN1

AN0 10

E

P57

D

P56

C

P55

CNTR0

A

P53 15

P52

B

P51

P50
P47 P46 20 P45

P44

P43

INT0 24

IC1

64
SEG8 SEG9 SEG10 SEG11 60 SEG12 SEG13 SEG14 SEG15 SEG16 55 SEG17 SEG18 SEG19 SEG20 SEG21 50 SEG22 SEG23 SEG24 P11 P12 45 P13 P14 P15 P16 P17
41

SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24
G F

25 P41 P40
RESET P71 P70 XIN 30 XOUT VSS P27 P26 P25 35 P24 P23 P22 P21 P20
40

CN-G

G 8

G 7

G6 G5

G4 G3

G2 G1

5

4

3

2

1

POWER LEVEL

TIMER CLOCK

0

9

8

7

6

STOP

START

CLEAR MINUTE PLUS

BEVERAGE

HOT WATER

FRESH FROZEN ROLLS / ROLLS / MUFFINS MUFFINS

DEFROST BAKED

FRESH

CENTER POTATOES VEGETABLES

SENSOR COOK
CENTER

POPCORN

SENSOR REHEAT

TASK LIGHT
KEEP WARM PLUS

ACCENT LIGHT
CUSTOM HELP

KEY UNIT

26

4

4

G12 G11 G10 G 9 R67 15k R66 15k R65 15k R64 15k R63 15k R62 15k R61 15k R60 15k

5

5

6

6

Figure S-3. LSI Unit Circuit

A

B

C

D

E

F

G

H

1 A B C D E

RY1

CN – B

2

3

4

5

11
(J2)
R52 R50

D40 1

2

CN – C

1
DIP

CN – F
3
8 R54 5

R53
C50 R51

1 IC-1 4

C51

R4

D20 B

E Q22

D21

C21 B Q21 E

ZD1

Q1

C3 E

R3

1

R5

R1

2

SP1
R2 3
C2 C1

VRS1

1

1 BFB

R-1210 R-1211 6
A
B
C
D
E

QKITPB036MRE0
D2 D1
5

(J1)

LOT NO
D4 D3
8

S P
T1

3

RY2

F

F

5

RY4

D22

CN – A

D23 4

D24

G

RY3

G

1

H 1

Figure S-4. Printed Wiring Board

2

3

4

5

27

H 6

R-1210 R-1211

PARTS LIST

Note: The parts marked “” may cause undue microwave exposure.

The parts marked “*” are used in voltage more than 250V.

“§” MARK: PARTS DELIVERY SECTION

REF. NO.

• 1- 1 1- 2
  1- 3 1- 4 1- 5 1- 6 1- 7 * 1- 8 1- 9 1-10 1-11 1-12 1-13 1-14 1-15
  2- 1 2- 1 2- 2 2- 3 2- 3 2- 4 2- 5 2- 5 2-5-1 2-5-1 2-5-2 2- 6 2- 6
  3- 1 3- 1A 3- 1B 3- 1C 3- 1D C1 C2 C3 C21 C50-51 D1-4 D20-24 D40 IC2 Q1 Q21 Q22 R1 R3 R4 R5 R50 R51 R52 R53 R54 RY1-2 RY3-4 SP1 T1 VRS1 ZD1 3- 2 3- 2

PART NO.

§

FH-DZB016MRY0 M RC-QZB018MRE0 M QFS-TA013WRE0 M RMOTDA211WRE0 M QFS-TA014WRE0 M RMOTEB031MRE0 M RTRN-B068MRE0 M RV-MZA288WRE0 M QFSHDB003MRE0 M QSW- MA085WRE0 M FFS-BA016/KIT M FACCDB011MRE0 M QSOCLB006MRE0 M RLMPTA068WRE0 M FDTCTA201WRK0 M

HDECQB033MRF0 M HDECQB034MRF0 M GDAI-B066MRP0 M GCABUB108MRP0 M GCABUB109MRP0 M TMAPCB068MRR0 M FANGKB009MRY0 M FANGKB010MRY0 M LANGQB016MRP0 M LANGQB020MRP0 M PGLSPB004MRE0 M PCOVPB099MRT0 M PCOVPB100MRT0 M

DPWBFB104MRU0 M QCNCMA017JDZZ M QCNCMA275DRE0 J QCNCMA335DRE0 J QCNCMA237DRE0 J RC-KZA087DRE0 J VCEAB31VW108M J VCEAB31VW106M J VCEAB31VW106M J RC- KZA087DRE0 J RH-DZA006PRE0 J VHD1SS270A/-1 J VHD1SS270A/-1 J VHIBA4558//-6 J VS2SB1238//-3 J VSKRC243M//-3 J VSKRA101M//-3 J VRS-B13AA681J J VRD-B12EF242J J VRD-B12EF332J J VRS-B13AA681J J VRS-B13AA331J J RR-DZA285DRZZ J RR- DZA286DRZZ J VRN-B12EK182F J VRN-B12EK364F J RRLY-A113DRE0 M RRLY-B004MRE0 M RALM-A014DRE0 J RTRNPB017MRE0 M RH-VZA032DRE0 J VHEHZ161///-1 J HPNLCB150MRF0 M HPNLCB151MRF0 M

DESCRIPTION ELECTRIC PARTS

High voltage rectifier assembly High voltage capacitor Temperature fuse 150°C (Magnetron) Turntable motor Temperature fuse 150°C (Cavity) Fan motor Power transformer Magnetron Fuse holder Primary interlock and door sensing switches Monitor switch (V-16G-2C25) with fuse (20A) assembly Power supply cord Oven lamp socket and hood lamp sockets Oven lamp and hood lamps AH sensor

CABINET PARTS

Bottom sash [R-1210] Bottom sash [R-1211] Base plate R Outer case cabinet [R-1210] Outer case cabinet [R-1211] Schematic diagram Hood lamp glass assembly [R-1210] Hood lamp glass assembly [R-1211] Hood lamp glass angle [R-1210] Hood lamp glass angle [R-1211] Hood lamp glass Base cover [R-1210] Base cover [R-1211]

RIGHT PANEL PARTS

Power unit

3-pin connector CN-A

2-pin connector CN-B

11-pin connector CN-C

3-pin connector CN-F

Capacitor

0.1 uF 50V

Capacitor 1000 uF 35V

Capacitor

10 uF 35V

Capacitor

10 uF 35V

Capacitor

0.1 uF 50V

Diode (1N4002)

Diode (1SS270A)

Diode (1SS270A)

IC (BA4558)

Transistor (2SB1238)

Transistor (KRC243M)

Transistor (KRA101M)

Resistor

680 ohm 1W

Resistor

2.4k ohm 1/4W

Resistor

3.3k ohm 1/4W

Resistor

680 ohm 1W

Resistor Resistor Resistor Resistor Resistor

330 ohm 1W
3.32k ohm ± 0.5% 1/4W 3.57k ohm ± 0.5% 1/4W
1.8k ohm ± 1.0% 1/4W 360k ohm ± 1.0% 1/4W

Relay (DU24D1-1PR(M))

Relay (FTR-F3AA024E)

Buzzer (PKM22EPT)

Transformer

Varistor (10G471K)

Zener diode (HZ16-1)

Right panel [R-1210]

Right panel [R-1211]

Q’TY CODE
1 AH 1 AG 1 AE 1 AL 1 AF 1 AR 1 BC 1 BK 1 AD 2 AE 1 AF 1 AQ 3 AE 3 AE 1
1 AH 1 AK 1 AF 1 AZ 1 AZ 1 AB 1 AN 1 AM 1 AG 1 AG 1 AH 1 AR 1 AS
1 1 1 AB 1 AC 1 AD 1 AB 1 AF 1 AB 1 AB 2 AB 4 AD 5 AA 1 AA 1 AK 1 AA 1 AB 1 AB 1 AA 1 AA 1 AA 1 AA 1 AA 1 AC 1 AC 1 AA 1 AA 2 2 1 AG 1 1 AE 1 AA 1 1

28

REF. NO.
3- 3 3- 3 3- 4 3- 5 3- 6
4- 1 4- 2 4- 3 4- 4 4- 5 4- 6
4- 7
4- 8 4- 9
4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24
5 5 5- 1 5- 2 5- 2 5-2-1
5-2-2 5-2-3 5-2-3 5-2-4 5-2-5 5-2-6 5-2-7 5-2-8 5-2-9 5-2-10 5-2-11 5-2-12 5-2-13 5- 3 5- 4 5- 5
6- 1 6-1-1 6-1-2 6-1-3 6-1-4 6-1-5 6-1-6 6-1-7 6- 2 6- 3 6- 4 6- 5 * 6- 6 6- 7 6- 8

PART NO.

§

JBTN-B116MRF0 M JBTN-B117MRF0 M MSPRTA050WRE0 M PSHEPB078MRR0 M XEPSD30P10XS0 M

PDUC-B118MRF0 M FROLPB025MRK0 M NTNT-A095WRE0 M LBNDKB009MRP0 M PDUC-B111MRF0 M MLEVPB016MRF0 M ***** M PPACGB014MRF0 M PHOK-B018MRF0 M FANGTB006MRY0 M NFANPB006MRE0 M LBSHC0037WRE0 M MLEVFB008MRP0 M PSKR-B014MRP0 M PCOVPB085MRP0 M MSPRTA046WRE0 M LANGTB055MRP0 M LSTPPB039MRF0 M LSTPPB040MRF0 M PDUC-B113MRP0 M PDUC-B117MRF0 M PCUSGB043MRP0 M PCOVPB101MRP0 M PCUSUB065MRP0 M

CDORFB295MRK0 M CDORFB296MRK0 M FDORFB072MRT0 M FCOV-B200MRK0 M FCOV-B201MRK0 M LSTPPB023MRF0 M MSPRTA046WRE0 M FUNTKB330MRE0 M FUNTKB331MRE0 M FW- VZB193MRE0 M PCOVPB098MRP0 M PCUSGB045MRP0 M DUNT-B048MRK0 M LHLD-A237WRFZ M LHLD-B020MRF0 M PSHEPA786WREZ M XEPSD30P10XS0 M PCUSUB067MRP0 M PCUSUB069MRP0 M GCOVHB045MRF0 M PSHEPB021MRE0 M XCPSD40P08000 M

CFZK-B460MRK0 M LBSHC0040MRE0 M LX-BZ0195WRE0 M LX-MZB001MRE0 M XBRSD50P60000 M XOTSD40P12000 M XTSSD50P35000 M XWHSD50-16300 M LANG-B003MRP0 M TINSEB295MRK0 M TINSKB082MRR0 M FW-VZB188MRE0 M QW-QZB025MRE0 M FW-VZB190MRE0 M TCAUAB041MRR0 M

DESCRIPTION
Open button [R-1210] Open button [R-1211] Button spring Menu label Screw; 3mm x 10mm
OVEN PARTS
Exhaust duct Turntable support assembly Turntable tray Capacitor holder Magnetron duct Open lever Oven cavity (Not replaceable part) Turntable motor packing Latch hook Unit mounting plate assembly Fan blade Cord bushing Mounting lever Bottom air guide Waveguide cover Latch spring Chassis support Upper door stopper Lower door stopper Fan duct Orifice Transformer cushion Light cover Cushion
DOOR PARTS
Door assembly [R-1210] Door assembly [R-1211] Door panel assembly Door frame assembly [R-1210] Door frame assembly [R-1211] Latch head Latch spring Key unit [R-1210] Key unit [R-1211] 11-pin wire harness PWB cover Cushion LSI unit Light guide LCD holder LED sheet Screw : 3mm x 10mm Cushion Cushion Choke cover Sealer film Screw : 4mm x 8mm
MISCELLANEOUS
Installation material assembly Grommet Toggle screw Cord holder Screw : 5mm x 60mm Screw : 4mm x 12mm Screw : 5mm x 35mm Washer Scale plate Operation manual Top and Wall template Low voltage harness High voltage wire A Main harness DHHS service caution label

29

R-1210 R-1211
Q’TY CODE 1 1 1 AA 1 2 AB
1 AH 1 AN 1 AN 1 AB 1 AF 1 AD 1 -1 AA 1 AF 1 AS 1 AC 1 AB 2 AC 1 AD 1 AH 2 AB 2 AD 1 AB 1 AB 1 AH 1 AC 1 AC 1 AE 1 AA
1 1 1 AW 1 1 1 AC 1 AB 1 1 1 1 AD 1 AB 1 1 AC 1 AC 1 AD 2 AB 1 AB 1 AB 1 AG 1 AE 4 AA
1 AH 1 AC 4 AC 1 AB 2 AA 3 AA 6 AA 2 AA 2 AE 1 1 AE 1 AT 1 AT 1 AU 2 AA

R-1210 R-1211

REF. NO. 6- 9 6-10 6-11
7- 1 7- 2 7- 2 7- 3 7- 4 7- 5 7- 6 7- 7 7- 8 7- 9 7-10

PART NO.

§

TCAUAB037MRR0 M TCAUAB005MRR0 M QW-VZB011MRE0 M

XOPSD40P12000 M XOTSF40P12000 M XOTSE40P12000 M XOTSD40P12000 M XHTSD40P08RV0 M LX-CZA038WRE0 M LX-CZ0052WRE0 M LX-BZA041WRE0 M XCBSD30P08000 M XOTSD40P08000 M LX-WZB003MRE0 M

DESCRIPTION
Monitor caution label Revised DHHS/GRD C/label Sensor ground wire
SCREWS, NUTS AND WASHERS
Screw : 4mm x 12mm Screw : 4mm x 12mm [R-1210] Screw : 4mm x 12mm [R-1211] Screw : 4mm x 12mm Screw : 4mm x 8mm Special screw Special screw Special screw Screw : 3mm x 8mm Screw : 4mm x 8mm Sensor washer

Q’TY CODE 1 AA 1 AB 1
7 AA 6 AA 6 AA 7 AA 2 AA 5 AA 2 AA 5 AA 5 AA 1 AA 1

HOW TO ORDER REPLACEMENT PARTS

To have your order filled promptly and correctly, please furnish the following information.

1. MODEL NUMBER

2. REF. NO. 3. PART NO.

4. DESCRIPTION

Order Parts from the authorized SHARP parts Distributor for your area. Defective parts requiring return should be returned as indicated in the Service Policy.

30

R-1210 R-1211

1

2

3

4

5

6

OVEN AND CABINET PARTS

A

7-8

6-11

1-15 7-10

7-3

4-1

2-3

B

A
4-10

7-5

1-12

4-12 7-5

B
7-5

7-8

7-1

B

1-5

4-17

7-8

2-4

7-5

C

6-11

7-1

A

C

4-16

4-17

7-2

4-13

4-3
D
4-2
E
2-1
F
1-14

6-10 7-8

7-1

D

4-7 7-3

4-15

4-8

6-8

1-4

7-8

7-1

7-5

;;;;;;;;;;;;;;;;;;;;;;;;;;;B;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

7-1 4-16 4-20

4-13

7-4

4-11

4-21

7-6 6-9

1-10

4-5

4-9 1-14

4-6

1-13

1-11

1-3

1-6

4-4

1-2

7-7

A

1-1

E

1-8
7-7
F

7-3

1-9

1-10 1-11

1-13 4-23

1-7 7-9
6-8 5-2-4

4-22

G
7-2

4-24

G

7-2

2-2 7-3

2-5-2

7-3

2-6

7-2

7-3 7-1

2-5

4-14

H

2-5-1

H

7-1 7-2

1

2

3

4

5

6

31

R-1210 R-1211

1

2

3

4

5

6

A

RIGHT PANEL PARTS

7-2 3-1
B

3-5 3-2

C

3-3

3-4

3-6 5-1

5-5 5-4

A

DOOR PARTS

5

4-18

4-19

B

5-3

C

D
5-2-3
E
F
6-1-1
6-1-2
G
6-1-3

5-2-4

5-2-13 5-2-7 5-2-5

5-2-11

5-2-12

5-2-9

5-2-8

5-2

5-2-10

5-2-1

5-2-6

5-2-2

5-5
D

MISCELLANEOUS

6-6

E

6-7

F
6-1 6-1-4
6-1-5

6-1-6 6-1-7 6-2

6-5
G
6-11

H

H

1

2

3

4

5

6

32

TOP PAD SPADBB043MRE0
DOOR PROTECTOR SPADP0221MRE0
WRAP COVER SSAKH0103MRE0

PACKING AND ACCESSORIES
4-3 TURNTABLE TRAY

6-2 SCALE PLATE

R-1210 R-1211

6-4 TOP & WALL TEMPLATE 6-3 OPERATION MANUAL 6-1 INSTALL MATERIAL ASSEMBLY
ACCESSORY PACK SSAKAB004MRE0
BOTTOM PAD SPADBB044MRE0
Non-replaceable items
PACKING CASE SPAKCB324MRR3 [R-1210] SPAKCB324MRR4 [R-1211]

33

R-1210 R-1211
COPYRIGHT © 2002 BY SHARP CORPORATION ALL RIGHTS RESERVED.
No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.
’02 SHARP CORP. (3S0.700E) Printed in U.S.A
34

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