R-1210
R-1211
SERVICE MANUAL
S2203R1510X//
OVER THE COUNTER
MICROWAVE OVEN
MODELS
SENSOR
R-1210
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
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
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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
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.
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.
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.
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.
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.
2) 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
PRODUCT SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
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"
Power Output
Case Dimensions
Cooking Cavity Dimensions
Width
17-1/2"
Height
9-7/8"
Depth 14-15/16"
1.5 Cubic Feet
Hood lamp
Control Complement
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
Oven Cavity Light
Safety Standard
Weight
Approx. 50 lbs.
CONTROL PANEL
REHEAT
CUSTOM
HELP
KEEP
WARM PLUS
FRESH ROLLS/
MUFFINS
FROZEN ROLLS/
MUFFINS
SENSOR
COOK CENTER
POPCORN
SENSOR
REHEAT
COOK SENSOR LBS
ACCENT
LIGHT
TASK
LIGHT
BEVERAGE
HOT
WATER
DEFROST
CENTER
BAKED
POTATOES
FRESH
VEGETABLES
1 1 0 0
1
2
3
4
5
POWER
LEVEL
TIMER
CLOCK
6
7
8
9
0
STOP
CLEAR
MINUTE PLUS
DEF HELP
WATTS
START
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
An example of how sensor works (Baked potatoes):
The following is a description of component functions during
oven operation.
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.
MIC
RO
WA
POWER LEVEL P-0 TO P-90 COOKING
2. Heat potatoes. Moisture and humidity is emitted rapidly.
You can smell the aroma as it cooks.
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:
VARI-MODE
ON TIME
OFF TIME
(100% power)
32 sec.
0 sec.
P-90 (approx. 90% power)
30 sec.
2 sec.
P-80 (approx. 80% power)
P-70 (approx. 70% power)
26 sec.
24 sec.
6 sec.
8 sec.
P-60 (approx. 60% power)
22 sec.
10 sec.
P-50 (approx. 50% power)
18 sec.
14 sec.
P-40 (approx. 40% power)
16 sec.
16 sec.
P-30 (approx. 30% power)
12 sec.
20 sec.
P-20 (approx. 20% power)
8 sec.
24 sec.
P-10 (approx. 10% power)
6 sec.
26 sec.
P-0
0 sec.
32 sec.
HIGH
(0% power)
VE
AH SENSOR
MIC
RO
WA
VE
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.
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.
5
R-1210
R-1211
NOTE: "
" indicates components with potential above 250V.
CAVITY
TEMPERATURE FUSE
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
MAGNETRON
TEMPERATURE FUSE
CONTROL UNIT
N.O.
COM.
A1
B1
DOOR
SENSING
SWITCH
FUSE
20A
B2
RY2
SECONDARY
INTERLOCK
RELAY
F2
RY1
RY4
A5
N.O.
HIGH VOLTAGE
CAPACITOR
1.0µF/ AC2300V
COM.
HL
OVEN LAMP
HOOD
LAMP
HL
OL
TTM
FM
FAN
MOTOR
A3
TURNTABLE
MOTOR
WHT
F3
MAGNETRON
120 V AC. GND
60 Hz
F1
AH SENSOR
OVEN LAMP
RELAY
GRN
MONITOR
SWITCH
BLK
RY3
POWER
TRANSFORMER
HIGH VOLTAGE
RECTIFIER
PRIMARY
INTERLOCK
SWITCH
Figure O-1. Oven Schematic-Off Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. VARIABLE COOKING CONTROL "HIGH".
4. "START" BUTTON PRESSED.
CAVITY
TEMPERATURE FUSE
MAGNETRON
TEMPERATURE FUSE
CONTROL UNIT
N.O.
COM.
A1
B1
DOOR
SENSING
SWITCH
FUSE
20A
B2
RY2
SECONDARY
INTERLOCK
RELAY
F2
RY1
RY4
N.O.
HOOD
LAMP
HL
HIGH VOLTAGE
CAPACITOR
1.0µF/ AC2300V
COM.
HL
OL
TTM
FM
FAN
MOTOR
A5
TURNTABLE
MOTOR
A3
OVEN LAMP
WHT
F3
MAGNETRON
120 V AC. GND
60 Hz
F1
AH SENSOR
OVEN LAMP
RELAY
GRN
POWER
TRANSFORMER
MONITOR
SWITCH
BLK
RY3
PRIMARY
INTERLOCK
SWITCH
Figure O-2. Oven Schematic-Cooking Condition
6
HIGH VOLTAGE
RECTIFIER
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.
TEST PROCEDURE
J
O CK
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
CONDITION
SENSOR
COOKING
CONDITION
PROBLEM
SHORTED OR OPENED WIRING
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.
AH SENSOR
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.
CONTROL UNIT
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.
The oven stops and "ERROR" is displayed or does not end during Sensor Cooking
condition. (Oven does not shut off after a cup of water is boiling by Sensor Cooking.)
Oven stops at 16 seconds after starting.
NOTE: For additional troubleshooting procedures, please refer back to the R-1200/1201 base model Service
Manual.
7
R-1210
R-1211
TEST PROCEDURES
PROCEDURE
LETTER
J
COMPONENT TEST
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.
8
R-1210
R-1211
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
L
G8
G7
G6
G5
G4
G3
G2
G9
5
4
3
2
1
POWER
LEVEL
TIMER
CLOCK
G12 G11 G10
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.
0
9
8
7
6
STOP
CLEAR
START
MINUTE PLUS
BEVERAGE
HOT
WATER
FRESH
BAKED
DEFROST
CENTER POTATOES VEGETABLES
TASK
LIGHT
ACCENT
LIGHT
FRESH
ROLLS /
MUFFINS
FROZEN
ROLLS /
MUFFINS
SENSOR
COOK
CENTER
KEEP
WARM
PLUS
CUSTOM
HELP
POPCORN
SENSOR
REHEAT
G1
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
OPERATIONAL VOLTAGE
CONNECTED COMPONENTS
RY1
Approx. -26.3V D.C.
Oven lamp / Fan motor / Turntable motor
RY2(COOK)
RY3
RY4
Approx. -25.3V D.C.
Approx. -26.3V D.C.
Approx. -26.3V D.C.
Power transformer
Hood lamp
Hood lamp
8. Disconnect the power supply cord.
9. Open the door and block it open.
9
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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
Steaks/Chops
0.5lbs
1ST STAGE
LEVEL TIME
60%
57sec.
2ND STAGE
LEVEL TIME
40%
17sec.
(8) If improper operation is indicated, the control unit is probably defective and should be checked.
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
CAUSE OR CORRECTION
Only pattern at “a” is broken.
Pattern at “a” and “b” are broken.
*Insert jumper wire J1 and solder.
*Insert the coil RCILF2003YAZZ between “c” and “d”.
1
T1
3
6) Make a visual inspection of the varistor. Check
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 780Ω ±
10%). If any abnormal condition is detected,
a
replace the defective parts.
RY2
RY1
d
7) Reconnect all leads removed from
(J1)
c
components during testing.
b
8) Re-install the power unit to the right panel
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 ”.
VRS1
N
10
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
2)
3)
4)
5)
Open the door and block it open.
To discharge high voltage capacitor, wait for 60 seconds.
Disconnect the leads to the primary of the power transformer.
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
1
The rated AC voltage is not present between
the normal open terminal of the relay RY2 and
the normal open terminal of the relay RY1.
Check supply voltage and oven power cord.
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)
9)
10)
11)
12)
13)
14)
O
CAUSE OR CORRECTION
Disconnect the power supply cord.
Open the door and block it open.
To discharge high voltage capacitor, wait for 60 seconds.
Reconnect all leads removed from components during testing.
Re-install the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
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
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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)
(2)
(3)
(4)
(5)
(6)
(7)
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Disconnect the sensor connector that is mounted to control panel.
Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
Disconnect the leads to the primary of the power transformer.
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
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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
F-1
F-2
To connector (F)
on Control Unit.
1
2
3
R1, R2 : 22Ω ± 1% 1/2W
R3 : 4.3kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
NC
NO
COM
COM NO
R1
F-3
R2
CONNECTOR
R3
R4
Sensor Dummy Resistor Circuit
13
NC
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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.
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.
(1) Key Unit
(2) Control Unit (The Control unit consists of LSI Unit and
Power U nit)
4) Reset Circuit
A circuit to generate a signals which resetting the LSI to
the initial state when power is applied.
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.
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.
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.
8) Indicator Circuit
This circuit consists of 25 segments and 4 common
electrodes using a Light Crystal Display.
1) LSI
This LSI controls the key strobe signal, relay driving
signal for oven function and indicator signal.
9) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD1-LD4).
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
10) Absolute Humidity Sensor Circuit
This circuit detects moisture of the cooking food to allow
its automatic cooking.
Application
LSI(IC1)
14
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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
8
AN3
AN2
OUT
IN
9
AN1
IN
10
AN0
IN
11-13
14
P57-P55
CNTR0
OUT
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).
0.1 sec.
Signal to sound buzzer (2.0 kHz).
H : GND
A
A: key touch sound.
L : -5V
2.0 sec.
B: Completion sound.
H : GND
B
L : -5V
15
16
P53
P52
OUT
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor).
Oven lamp, fan motor and turntable motor driving signal
16.7 msec.
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
H : GND
L : -5V
During cooking
17
18
19
P51
P50
P47
OUT
OUT
OUT
20
P46
IN
21
P45
IN
22
P44
IN
23
P43
IN
24
INT0
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor).
Terminal not used.
Magnetron high-voltage circuit driving signal.
OFF
H : GND
To turn on and off the cook relay (RY2). The
Maximum
signals holds “L” level during microwave output
ON
L : -5V
cooking and “H” level while not cooking. In
OFF
OFF
H : GND
other cooking modes (variable cooking) the
24 sec.
of maximum
signal turns to “H” level and “L” level in 70%
8 sec.
output
ON
L : -5V
repetition according to the power level.
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.
Signal similar to P46.
When either G11 line on key matrix is touched, a corresponding signal will be input into P45.
Signal similar to P46.
When either G10 line on key matrix is touched, a corresponding signal will be input into P44.
Signal similar to P46.
When either G9 line on key matrix is touched, a corresponding signal will be input into P43.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
H : GND
L : -5V
16.7 msec.
15
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Pin No.
Signal
P41
P40
I/O
25
26
27
RESET
OUT
IN
IN
28-29
30
P71-P70
XIN
OUT
IN
31
XOUT
OUT
32
VSS
IN
33
P27
OUT
34
P26
OUT
35
P25
OUT
36
P24
OUT
37
P23
OUT
38
P22
OUT
39
P21
OUT
40
P20
OUT
41
P17
OUT
42
P16
OUT
43
P15
OUT
44
P14
OUT
45-47
P13-P11
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
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Pin No.
Signal
I/O
Description
48-72
SEG24-SEG0
OUT
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.)
LCD (Pin No.)
LSI signal (Pin No.)
LCD (Pin No.)
SEG 24 (48) ---------------- SEG24 (29)
SEG 11 (61) ------------------ SEG11 (16)
SEG 23 (49) ---------------- SEG23 (28)
SEG 10 (62) ------------------ SEG10 (15)
SEG 22 (50) ---------------- SEG22 (27)
SEG 9 (63) ------------------ SEG 9 (14)
SEG 21 (51) ---------------- SEG21 (26)
SEG 8 (64) ------------------ SEG 8 (13)
SEG 20 (52) ---------------- SEG20 (25)
SEG 7 (65) ------------------ SEG 7 (12)
SEG 19 (53) ---------------- SEG19 (24)
SEG 6 (66) ------------------ SEG 6 (11)
SEG 18 (54) ---------------- SEG18 (23)
SEG 5 (67) ------------------ SEG 5 (10)
SEG 17 (55) ---------------- SEG17 (22)
SEG 4 (68) ------------------ SEG 4 ( 9)
SEG 16 (56) ---------------- SEG16 (21)
SEG 3 (69) ------------------ SEG 3 ( 8)
SEG 15 (57) ---------------- SEG15 (20)
SEG 2 (70) ------------------ SEG 2 ( 7)
SEG 14 (58) ---------------- SEG14 (19)
SEG 1 (71) ------------------ SEG 1 ( 6)
SEG 13 (59) ---------------- SEG13 (18)
SEG 0 (72) ------------------ SEG 0 ( 5)
SEG 12 (60) ---------------- SEG12 (17)
73/74
75
76
77
78
79
80
VCC/VREF
AVSS
COM3
COM2
COM1
COM0
VL3
IN
IN
OUT
OUT
OUT
OUT
IN
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
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ABSOLUTE HUMIDITY SENSOR CIRCUIT
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) 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
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.
R3
R1
S
R2
S : Thermistor
open vessel
C : Thermistor
closed vessel
620k
11
R54
300k
12
R55
150k
13
R56
75k
17
R57
37.4k
15
R53
C. Thermistor in
closed vessel
S. Thermistor in
open vessel
R52
S
Absolute humidity vs,
output voltage characteristic
VA : -15V
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
18
VA : -15V
SW1
P57
P56
P55
P51
P53
47k
D50
VC : -5V
SW4
SW5
LSI
(IC1)
C50
0.1uF
R51
SW2
SW3
AN0
0.01uF
0.01uF
R54
360k
R50
15k
R50
330
F-2
R51
3.32k R53
1.8k
+
IC2
C51
F-1
C
R52
F-3
3.57k
10
C51
47k
Output voltage
C
Operational
amplifier
Output
voltage
+
1) Absolute humidity sensor circuit
0.1
uF
Sensing part
(Open vessel)
C50
ventilation opening for sensing
9
AN1
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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.
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).
approx. 1M ohm
2. Shapes of Electronic Components
Transistor
2SB1238
E
C
B
Transistor
KRA101M
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. Servicing Tools
Tools required to service the touch control panel
assembly.
1) Soldering iron: 30W
(It is recommended to use a soldering iron with a grounding
terminal.)
2) Oscilloscope: Single beam, frequency range: DC-10MHz
type or more advanced model.
3) 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 to microwave energy. Please follow the instructions below before
operating the oven.
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.).
1.
2.
3.
4.
5.
6.
Door does not close firmly.
Door hinge, support or latch hook is damaged.
The door gasket or seal is damaged.
The door is bent or warped.
There are defective parts in the door interlock system.
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.
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
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;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage
capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, Power transformer and Oven
cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange,
Chassis support and other metallic plate.
4) 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
R-1210
R-1211
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.
Sensor ground wire
Screw
Screws
Exhaust duct
AH sensor
Ditch
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
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.
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
OVEN LAMP SOCKET REMOVAL
the terminal hole of the oven lamp socket with the small
flat type screw driver.
8. Now, the oven lamp socket is free.
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
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.
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.
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.
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
Oven cavity
front face plate
Marking
Door
assembly
Screw
Tabs
Bottom sash
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
R-1210
R-1211
Note: As the engaging part of choke cover and door frame
are provided at 15 places, do not force any particular
part.
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.
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.
Screws
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.
PWB cover
Hole
Tabs
Marking
11-pin wire
harness
11-pin wire
harness
LSI unit
Tab
Tab
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.
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.
Upper door stopper
A
Lower
door stopper
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.
Putty knife
Door frame
Figure C-4. Door Disassembly
Ribbon cable
Liquid Crystal
Display (LCD)
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.
Printed wiring board
of LSI unit
Choke cover
Tab
Cushion
Figure C-6. LSI unit
23
1
2
3
24
T1
11-PIN WIRE HARNESS
1
CN-A
5
4
5
2
1
1
N.O.
CN-C
IC1
8
G
R
Y
11
9
W
H
T
(on the door)
2 3 4 5 6 7
R O Y G B P
E R L R L P
D G W N U L
CN-G
BRN
COM.
5
LSI UNIT
PRIMARY
INTERLOCK
SWITCH
CN-A
RED
2
3 ORG
4
1
10
B
L
K
11
P
N
K
E
BRN
HOOD LAMP &
SOCKET
WHT
GRN
RED
ORG
HOOD LAMP &
SOCKET
WHT
WHT
Blue Marking
to Base Plate Right
GRN
GRN
Figure S-1. Pictorial Diagram
GRY
WHT
WHT
MONITOR
SWITCH
COM.
WHT
WHT
TURNTABLE
MOTOR
WHT
BLK
WHT
WHT
RED
RED
CAVITY
TEMPERATURE
FUSE
BLK
GRY
BLK
BLK
RED
WHT
MAGNETRON
TEMPERATURE
FUSE
FAN
MOTOR
RED
RED
Power Supply
cord 120V 60Hz
POWER
TRANSFORMER
MAGNETRON
HIGH VOLTAGE
RECTIFIER
HIGH VOLTAGE
CAPACITOR
HIGH VOLTAGE
WIRE A
HIGH VOLTAGE COMPONENTS
OVEN LAMP &
SOCKET
Blue
Marking
GRN 1 GRN
4
1
CN-C B
R
N
RY3
RY4
N.C.
RED
CN-B
BLK
3 BLK
3
BRN 1
ORG 3
RED 2
YLW 4
GRN 5
BLU 6
PPL 7
GRY 8
R
E
D
COM.
1
RY2: SECONDARY INTERLOCK RELAY
RY2:
N.O.
N.O.
CN-C
11
1 RED
2 GRN
FUSE &
HOLDER
BLK
WHT 2 WHT
2
WHT 9
RED
BLK
BLK
WHT
COM.
3
RED
D
PNK 11
BLK 10
CN-C
H
GRY
CN-F
F
RY1
1
POWER UNIT
GRN
RED
C
2
1
COM.
RED
1
WHT
CN-B
G
DOOR SENSING SWITCH
N.O.
B
AH SENSOR
A
GRY
CN-F
1 BLK
2 RED
3 WHT
R-1210
R-1211
5
6
A
B
C
6
D
E
F
G
H
R-1210
R-1211
2
1
4
3
6
5
A
A
T1
–
+
–
GND
C3 10µ/35v
b
+
ZD1
HZ16-1
D2
C1
R3 2.4k
D4
8
C2 1000µ/35v
3
C1 0.1µ/50v
d
CN-C
D1
D3
B
a
D1-D4
1N4002
5
VRS1
10G471K
1
B
C2
VA
C3
INT
C4
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
C6
BUZZER
C5
MICRO
(J1)
Q1 2SB1238
R1 680 1w
R5 680 1w
–
c
Q21
KRC243M
RY1
MICRO
R4 3.3k
COM
D22
1SS270A
N.O
AC(H)
C21
10µ/35v
SP1
PKM22EPT
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
N.O
D21
1SS270A
AC(N)
C
+
COM
RY2
Q22
KRA101M
HOOD LAMP
A3
HOOD LAMP
COMMON
A1
D
D23
1SS270A
D
C7
HOOD
LAMP
C8
HOOD
LAMP
C9
DOOR
SENSING
SWITCH
C11
AHR
D24
1SS270A
RY3
E
HOOD LAMP
C
A5
E
RY4
CN-A
B-2
D20 1SS270A
DOOR
SENSING
SWITCH
D40 1SS270A
B-1
F
IC2
BA4558
C50 0.1µ/50v
5
R51
3.32kD
1/4w
CN-B
G
8
IC2
6
R53 1.8kF 1/4w
4
7
C51 0.1µ/50v
R52
3.57kD
1/4w
F
C10
AHA
G
R54 360kF 1/4w
F-3
F-2
F-1
R50 330 1w
NOTE
: IF NOT SPECIFIED, 1/4W ± 5%
CN-F
H
H
Figure S-2. Power Unit Circuit
1
2
4
3
25
5
6
DOOR
SENSING
SWITCH
NOTE
C9
C5
C8
HOOD LAMP
MICRO.
C7
C4
C6
C11
C10
C3
C2
HOOD LAMP
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
BUZZER
AHR
AHA
INT
VA
R9 680 1/2w
LD1 LD2 LD3 LD4
R40 4.7k
C1 0.1µ/50v
R20 1k
G
F
: IF NOT SPECIFIED, 1/16W ± 5%
R41 15k
Q23
DTA143EKA
Q22
DTA143EKA
C20
0.1µ/50v
Q21
DTA143EKA
Q30
DTA143EKA
Q10
DTA143EKA
C10
0.1µ
/50v
–
A
B
R50 15k
R55 150kF
C11 0.01µ/25v
R1 82
R10 15k
D
R52 47k
(J10)
(J11) 4.7k
CF1
CSTS4.00MG03
5
R71 15k
R70 15k
R69 15k
R68 15k
E
C4
0.01µ/25v
R5 15k
R51 47k
(J12)
CN-G
B
A
E
D
C
VC
1
COOK SENSOR LBS KG DEF HELP
20
15
10
5
4
9
HOT
WATER
FROZEN
ROLLS /
MUFFINS
5
0
BEVERAGE
FRESH
ROLLS /
MUFFINS
KEY UNIT
G7
G8
24
VL2
VL1
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P57
P56
P55
CNTR0
P53
P52
P51
P50
P47
P46
P45
P44
P43
INT0
1
GND
LIQUID CRYSTAL DISPLAY
IC1
45
50
55
60
G5
7
2
41
SENSOR
COOK
CENTER
POPCORN
SENSOR
REHEAT
ACCENT
LIGHT
CUSTOM
HELP
KEEP
WARM
PLUS
START
MINUTE PLUS
TASK
LIGHT
STOP
CLEAR
1
6
G2
TIMER
CLOCK
G3
POWER
LEVEL
G
F
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
G4
FRESH
BAKED
DEFROST
CENTER POTATOES VEGETABLES
8
3
G6
64
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
P11
P12
P13
P14
P15
P16
P17
R60
15k
G1
29
4
5
Figure S-3. LSI Unit Circuit
ZD1
UDZ4.3B
C
R54 300k
R4 1k
D50
MA152WA
Q2
2SA1037AK
R53 620k
(J14)
(J15) 4.7k
C51 0.01µ/25v
(J16) 4.7k
(J17)
C63 330pF/50v
R2 4.7k
Q1
2SA1037AK
G12 G11 G10 G 9
+
80
R3 4.7k
C3 0.01µ/25v
R57 37.4kF
65
CPU UNIT
R8 4.7k R7 4.7k R6 4.7k
R100
15k
C1
R56 75kF
COM1 (LCD)
COM2 (LCD)
COM3 (LCD)
COM4 (LCD)
GND
C40
0.01µ
/25v
C50 0.01µ/25v
R80
1M
COM0 (IC1)
COM1 (IC1)
COM2 (IC1)
COM3 (IC1)
75
30
(J13) 4.7k
R75 270k
R74 270k
R73 270k
R72 270k
26
R67
15k
4
R66
15k
3
C60 330pF/50v
70
35
2
VL3
COM0
COM1
COM2
COM3
AVSS
VREF
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
1
R65
15k
H
P41
P40
RESET
P71
P70
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
G
40
F
3
R64
15k
D
R62
15k
C
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
E
2
R63
15k
1
25
B
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
A
R61
15k
CN-C
R-1210
R-1211
6
A
B
C
6
D
E
F
G
H
C61 330pF/50v
C62 330pF/50v
C2 47µ/16v
R-1210
R-1211
2
1
4
3
5
6
A
A
CN - F
3
R53
1
DIP
8
R54
5
C50
B
B
R51
11
CN - C
2
CN - B
1
R4
E
D20
B
C
C51
4
2
IC-1
(J2)
R52
R50
D40
1
SP1
1
Q22
C
D21
C3
R2
1
BFB
E
3
ZD1
RY1
B
C21
E
Q21
D
D
R1
R5
R3
Q1
C2
C1
QKITPB036MRE0
D2
D1
1
VRS1
5
E
P
(J1)
E
S
8
T1
5
LOT NO
D4
D3
3
RY2
F
F
CN - A
D22
RY4
D23
4
D24
RY3
1
G
G
H
H
Figure S-4. Printed Wiring Board
1
2
4
3
27
5
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.
REF. NO.
"§" MARK: PARTS DELIVERY SECTION
PART NO.
§
DESCRIPTION
Q'TY CODE
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
FH-DZB016MRY0
RC-QZB018MRE0
QFS-TA013WRE0
RMOTDA211WRE0
QFS-TA014WRE0
RMOTEB031MRE0
RTRN-B068MRE0
RV-MZA288WRE0
QFSHDB003MRE0
QSW-MA085WRE0
FFS-BA016/KIT
FACCDB011MRE0
QSOCLB006MRE0
RLMPTA068WRE0
FDTCTA201WRK0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
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
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
HDECQB033MRF0
HDECQB034MRF0
GDAI-B066MRP0
GCABUB108MRP0
GCABUB109MRP0
TMAPCB068MRR0
FANGKB009MRY0
FANGKB010MRY0
LANGQB016MRP0
LANGQB020MRP0
PGLSPB004MRE0
PCOVPB099MRT0
PCOVPB100MRT0
M
M
M
M
M
M
M
M
M
M
M
M
M
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]
ELECTRIC PARTS
*
*
*
∆*
1
1
1
1
1
1
1
1
1
2
1
1
3
3
1
AH
AG
AE
AL
AF
AR
BC
BK
AD
AE
AF
AQ
AE
AE
1
1
1
1
1
1
1
1
1
1
1
1
1
AH
AK
AF
AZ
AZ
AB
AN
AM
AG
AG
AH
AR
AS
CABINET PARTS
RIGHT PANEL PARTS
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
DPWBFB104MRU0
QCNCMA017JDZZ
QCNCMA275DRE0
QCNCMA335DRE0
QCNCMA237DRE0
RC-KZA087DRE0
VCEAB31VW108M
VCEAB31VW106M
VCEAB31VW106M
RC-KZA087DRE0
RH-DZA006PRE0
VHD1SS270A/-1
VHD1SS270A/-1
VHIBA4558//-6
VS2SB1238//-3
VSKRC243M//-3
VSKRA101M//-3
VRS-B13AA681J
VRD-B12EF242J
VRD-B12EF332J
VRS-B13AA681J
VRS-B13AA331J
RR-DZA285DRZZ
RR-DZA286DRZZ
VRN-B12EK182F
VRN-B12EK364F
RRLY-A113DRE0
RRLY-B004MRE0
RALM-A014DRE0
RTRNPB017MRE0
RH-VZA032DRE0
VHEHZ161///-1
HPNLCB150MRF0
HPNLCB151MRF0
M
M
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
M
M
J
M
J
J
M
M
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
Capacitor
1000 uF
Capacitor
10 uF
Capacitor
10 uF
Capacitor
0.1 uF
Diode (1N4002)
Diode (1SS270A)
Diode (1SS270A)
IC (BA4558)
Transistor (2SB1238)
Transistor (KRC243M)
Transistor (KRA101M)
Resistor
680 ohm
Resistor
2.4k ohm
Resistor
3.3k ohm
Resistor
680 ohm
Resistor
330 ohm
Resistor
3.32k ohm
Resistor
3.57k ohm
Resistor
1.8k ohm
Resistor
360k ohm
Relay (DU24D1-1PR(M))
Relay (FTR-F3AA024E)
Buzzer (PKM22EPT)
Transformer
Varistor (10G471K)
Zener diode (HZ16-1)
Right panel [R-1210]
Right panel [R-1211]
28
50V
35V
35V
35V
50V
±
±
±
±
1W
1/4W
1/4W
1W
1W
0.5%
0.5%
1.0%
1.0%
1/4W
1/4W
1/4W
1/4W
1
1
1
1
1
1
1
1
1
2
4
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
AB
AC
AD
AB
AF
AB
AB
AB
AD
AA
AA
AK
AA
AB
AB
AA
AA
AA
AA
AA
AC
AC
AA
AA
AG
AE
AA
R-1210
R-1211
REF. NO.
3- 3
3- 3
3- 4
3- 5
3- 6
PART NO.
JBTN-B116MRF0
JBTN-B117MRF0
MSPRTA050WRE0
PSHEPB078MRR0
XEPSD30P10XS0
§
M
M
M
M
M
DESCRIPTION
Open button [R-1210]
Open button [R-1211]
Button spring
Menu label
Screw; 3mm x 10mm
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
PDUC-B118MRF0
FROLPB025MRK0
NTNT-A095WRE0
LBNDKB009MRP0
PDUC-B111MRF0
MLEVPB016MRF0
*************
PPACGB014MRF0
PHOK-B018MRF0
FANGTB006MRY0
NFANPB006MRE0
LBSHC0037WRE0
MLEVFB008MRP0
PSKR-B014MRP0
PCOVPB085MRP0
MSPRTA046WRE0
LANGTB055MRP0
LSTPPB039MRF0
LSTPPB040MRF0
PDUC-B113MRP0
PDUC-B117MRF0
PCUSGB043MRP0
PCOVPB101MRP0
PCUSUB065MRP0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
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
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
CDORFB295MRK0
CDORFB296MRK0
FDORFB072MRT0
FCOV-B200MRK0
FCOV-B201MRK0
LSTPPB023MRF0
MSPRTA046WRE0
FUNTKB330MRE0
FUNTKB331MRE0
FW-VZB193MRE0
PCOVPB098MRP0
PCUSGB045MRP0
DUNT-B048MRK0
LHLD-A237WRFZ
LHLD-B020MRF0
PSHEPA786WREZ
XEPSD30P10XS0
PCUSUB067MRP0
PCUSUB069MRP0
GCOVHB045MRF0
PSHEPB021MRE0
XCPSD40P08000
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
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
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
CFZK-B460MRK0
LBSHC0040MRE0
LX-BZ0195WRE0
LX-MZB001MRE0
XBRSD50P60000
XOTSD40P12000
XTSSD50P35000
XWHSD50-16300
LANG-B003MRP0
TINSEB295MRK0
TINSKB082MRR0
FW-VZB188MRE0
QW-QZB025MRE0
FW-VZB190MRE0
TCAUAB041MRR0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
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
Q'TY CODE
1
1
1
AA
1
2
AB
OVEN PARTS
∆
∆
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
2
1
1
1
1
1
1
1
AH
AN
AN
AB
AF
AD
-AA
AF
AS
AC
AB
AC
AD
AH
AB
AD
AB
AB
AH
AC
AC
AE
AA
DOOR PARTS
∆
∆
∆
∆
∆
∆
∆
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
4
AW
AC
AB
AD
AB
AC
AC
AD
AB
AB
AB
AG
AE
AA
MISCELLANEOUS
*
29
1
1
4
1
2
3
6
2
2
1
1
1
1
1
2
AH
AC
AC
AB
AA
AA
AA
AA
AE
AE
AT
AT
AU
AA
R-1210
R-1211
REF. NO.
6- 9
6-10
6-11
PART NO.
TCAUAB037MRR0
TCAUAB005MRR0
QW-VZB011MRE0
§
M
M
M
DESCRIPTION
Monitor caution label
Revised DHHS/GRD C/label
Sensor ground wire
Q'TY CODE
1
AA
1
AB
1
SCREWS, NUTS AND WASHERS
7- 1
7- 2
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
XOPSD40P12000
XOTSF40P12000
XOTSE40P12000
XOTSD40P12000
XHTSD40P08RV0
LX-CZA038WRE0
LX-CZ0052WRE0
LX-BZA041WRE0
XCBSD30P08000
XOTSD40P08000
LX-WZB003MRE0
M
M
M
M
M
M
M
M
M
M
M
Screw : 4mm x
Screw : 4mm x
Screw : 4mm x
Screw : 4mm x
Screw : 4mm x
Special screw
Special screw
Special screw
Screw : 3mm x
Screw : 4mm x
Sensor washer
12mm
12mm [R-1210]
12mm [R-1211]
12mm
8mm
7
6
6
7
2
5
2
5
5
1
1
8mm
8mm
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
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
R-1210
R-1211
2
1
4
3
6
5
OVEN AND CABINET PARTS
7-8
A
A
4-10
6-11
7-3
1-15
7-5
7-10
1-12
2-3
4-1
4-12
7-5
B
B
7-5
7-8
B
7-1
1-5
7-8
4-17
7-5
2-4
A
7-1
6-11
C
4-16
C
4-17
7-2
4-13
6-10
7-8
4-3
D
7-1
;;;;
;
;;;;
;;;;;;;;
;;;;;;
; ;;
;
;;;;;
;;;;
;;;;;;;;;;
;;;
;
;
;;
;B
;;;;
;
;
;
;
;
;
;;
;
;
;
;
;;
;
;
;
;
;
;
;;
;;;;;;
;
;
;;;;;;;;
4-7
7-3
E
1-3
7-5
7-1
4-2
D
7-1
4-4
1-6
1-2
4-16 4-20
7-7
7-4
4-13
4-11
1-1
A
E
4-21
2-1
4-15
7-6
4-8
6-8
6-9
1-8
4-5
1-10
1-4
4-9
1-14
4-6
F
1-10
1-7
1-11
1-13
1-14
F
1-11
1-9
7-3
7-7
1-13
7-8
7-9
4-23
4-22
6-8
5-2-4
G
G
4-24
7-2
2-2
7-2
7-3
7-3
2-6
7-3
7-2
2-5-2
2-5
7-1
4-14
2-5-1
H
H
7-1
7-2
1
2
4
3
31
5
6
R-1210
R-1211
2
1
A
4
3
6
5
A
RIGHT PANEL PARTS
DOOR PARTS
7-2
3-6
3-1
4-18
5
B
4-19
B
5-5
3-5
5-3
5-4
3-2
C
C
3-4
3-3
5-1
5-2-13
5-2-7
D
5-5
5-2-5
5-2-11
D
5-2-4
5-2-12
5-2-9
5-2-8
5-2-10
5-2-3
5-2
MISCELLANEOUS
5-2-1
E
E
6-6
5-2-2
6-7
5-2-6
F
F
6-1
6-1-1
6-1-4
6-1-5
6-1-2
6-1-6
6-5
G
6-1-3
G
6-1-7
6-2
6-11
H
H
1
2
4
3
32
5
6
R-1210
R-1211
PACKING AND ACCESSORIES
4-3 TURNTABLE TRAY
TOP PAD
SPADBB043MRE0
6-2 SCALE PLATE
6-4 TOP & WALL TEMPLATE
DOOR PROTECTOR
SPADP0221MRE0
6-3
WRAP COVER
SSAKH0103MRE0
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