R-1200
R-1201
SERVICE MANUAL
SY130R1200X//
OVER THE COUNTER
MICROWAVE OVEN
MODELS
R-1200
R-1201
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..)
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
GENERAL INFORMATION ................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLESHOOTING GUIDE .............................................................................................................................. 9
TEST PROCEDURE ............................................................................................................................................ 11
TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................ 18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 23
PICTORIAL DIAGRAM ........................................................................................................................................ 30
POWER UNIT CIRCUIT ...................................................................................................................................... 31
LSI UNIT CIRCUIT ............................................................................................................................................... 32
PRINTED WIRING BOARD ................................................................................................................................. 33
PARTS LIST ........................................................................................................................................................ 34
PACKING AND ACCESSORIES ......................................................................................................................... 38
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
39
R-1200
R-1201
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.
40
R-1200
R-1201
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
remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
, and then
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.
1
R-1200
R-1201
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 does 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-1200
R-1201
SERVICE MANUAL
PRODUCT DESCRIPTION
OVER THE COUNTER
MICROWAVE OVEN
R-1200/ R-1201
GENERAL INFORMATION
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-1200 and
R-1201.
It is recommended that service personnel carefully study the entire
text of this 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
3
OPERATION
TROUBLESHOOTING GUIDE AND
TEST PROCEDURE
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
PARTS LIST
R-1200
R-1201
PRODUCT SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
120 Volts / 14.1 Amperes
60 Hertz
Single phase, 3 wire grounded
Power Output
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"
Case Dimensions
Cooking Cavity Dimensions
1.5 Cubic Feet
Hood lamp
Control Complement
Oven Cavity Light
Safety Standard
Weight
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;
P-HI .................................................. 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
KEEP WARM pad, ACCENT LIGHT pad
TASK LIGHT pad, REHEAT CENTER pads
COOK CENTER pads, DEFROST CENTER pads
Number selection pads, POWER LEVEL pad
TIMER / CLOCK pad, MINUTE PLUS pad
STOP/CLEAR pad, STARTpad
20W x 1 Incandescent light bulb
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Approx. 50 lbs.
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed
and grounded in accordance with the National Electrical Code and local codes and ordinances.
In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the
electric current.
WARNING: Improper use of the grounding plug can result in a risk of electric shock.
4
R-1200
R-1201
Electrical Requirements
The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE
GROUNDING PIN FROM THE PLUG.
The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more dedicated line, using
a grounded receptacle. The receptacle should be located inside the cabinet directly above the Microwave Oven/Hood
system mounting location.
3-Pronged Plug
Grounded
Receptacle Box
Grounding Pin
3-Pronged Receptacle
OVEN DIAGRAM
1
15
5
2
10
6
4
3
7
12
13
9
8
11
7
14
1.
2.
3.
4.
5.
6.
7.
8.
9.
Oven door with see-through window.
Door hinges.
Waveguide cover.
Turntable motor shaft.
Oven lamp.
It will light when oven is operating or door is open.
Door latches.
The oven will not operate unless the door is
securely closed.
One touch door open button.
Auto Touch control panel
Time display: Digital display, 99 minutes 99
seconds.
10.Ventilation openings.
10
11.Light Cover.
12.Bottom sash.
13.Removable turntable.
The turntable will rotate clockwise or
counterclockwise.
Only remove for cleaning.
14.Removable turntable support.
15. Power supply cord
CONTROL PANEL
COOK CENTER
TIMER
CLOCK
KEEP
WARM
BAKED
POTATOES
RICE
GROUND
MEAT
POPCORN
REHEAT
CENTER
NO.
LBS.
CUPS
OZ.
1
2
3
4
5
POWER
LEVEL
MINUTE
PLUS
6
7
8
9
0
STOP
CLEAR
START
COOK DEFROST
ACCENT
LIGHT
TASK
LIGHT
FROZEN
VEGETABLES
FRESH
VEGETABLES
FROZEN
ENTREES
HOT
WATER
DEFROST
CENTER
1 1 0 0
WATTS
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.
5
R-1200
R-1201
OPERATION
DESCRIPTION OF OPERATING SEQUENCE
The following is a description of component functions during
oven operation.
so that it will function in the following sequence.
(1) When the door opens from a closed position, the
secondary interlock relay (RY2) and primary interlock
switch open their contacts. And contacts of the relay
(RY1) remains closed. Then the monitor switch
contacts close.
(2) When the door is closed from the open position, the
monitor switch contacts first open, and then the
contacts of the primary interlock switch and door
sensing switch close. And contacts of the relay
(RY1) open.
If the primary interlock switch and secondary interlock relay
(RY2) fail with their contacts closed when the door is
opened, the closing of the monitor switch contacts will form
a short circuit through the monitor fuse, primary interlock
switch, relay (RY1) and secondary interlock relay (RY2),
causing the monitor fuse to blow.
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 flashing "88 : 88".
To set any program or set the clock, you must first
touch the STOP/CLEAR pad. The display will clear,
and " : " will appear .
COOKING CONDITION
Program desired cooking time touching the NUMBER pads.
When the START pad is touched, the following operations
occur:
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:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(For details, refer to Figure O-2)
RELAY
RY1
RY2
RY3, RY4
CONNECTED COMPONENTS
Oven lamp / Fan motor / Turntable motor
Power transformer
Hood lamp
VARI-MODE
ON TIME
Power 10(P-HI)
32 sec.
(100% power)
Power 9(P-90)
30 sec.
(approx. 90% power)
Power 8(P-80)
26 sec.
(approx. 80% power)
Power 7(P-70)
24 sec.
(approx. 70% power)
Power 6(P-60)
22 sec.
(approx. 60% power)
Power 5(P-50)
18 sec.
(approx. 50% power)
Power 4(P-40)
16 sec.
(approx. 40% power)
Power 3(P-30)
12 sec.
(approx. 30% power)
Power 2(P-20)
8 sec.
(approx. 20% power)
Power 1(P-10)
6 sec.
(approx. 10% power)
Power 0(P-0)
0 sec.
(0% power)
2. 120 volts A.C. is supplied to the primary winding of the
power transformer and is converted to about 3.3 volts
A.C. output on the filament winding, and approximately
2000 volts A.C. on the high voltage winding.
3. The filament winding voltage heats the magnetron
filament and the H.V. winding voltage is sent to a voltage
doubler circuit.
4. The microwave energy produced by the magnetron is
channelled through the waveguide into the cavity feedbox, and then into the cavity where the food is placed to
be cooked.
5. Upon completion of the cooking time, the power
transformer, oven lamp, etc. are turned off, and the
generation of microwave energy is stopped. The oven
will revert to the OFF condition.
6. When the door is opened during a cook cycle, monitor
switch, door sensing switch, primary interlock switch,
relay (RY1) and secondary interlock relay (RY2) are
activated with the following results. The circuits to the
cooling fan motor, the turntable motor, and the high
voltage components are de-energized, the oven lamp
remains on, and the digital read-out displays the time still
remaining in the cook cycle when the door was opened.
7. The monitor switch is electrically monitoring the operation
of the primary interlock switch and secondary interlock
relay (RY2) and is mechanically associated with the door
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.
6
R-1200
R-1201
NOTE: "
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
" indicates components with potential above 250V.
CAVITY
TEMPERATURE FUSE
MAGNETRON
TEMPERATURE FUSE
CONTROL UNIT
N.O.
COM.
A1
B1
DOOR
SENSING
SWITCH
FUSE
20A
B2
RY2
RY1
A3
A5
N.O.
HIGH VOLTAGE
CAPACITOR
1.0µF/ AC2300V
COM.
HL
OVEN LAMP
HOOD
LAMP
HL
OL
TTM
FM
MONITOR
SWITCH
WHT
RY4
TURNTABLE
MOTOR
120 V AC. GND
60 Hz
MAGNETRON
SECONDARY
INTERLOCK
RELAY
OVEN LAMP
RELAY
GRN
FAN
MOTOR
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
RY1
A5
N.O.
HOOD
LAMP
HL
HIGH VOLTAGE
CAPACITOR
1.0µF/ AC2300V
COM.
HL
OL
TTM
FM
MONITOR
SWITCH
A3
TURNTABLE
MOTOR
RY4
OVEN LAMP
120 V AC. GND
60 Hz
MAGNETRON
SECONDARY
INTERLOCK
RELAY
OVEN LAMP
RELAY
GRN
WHT
B2
RY2
FAN
MOTOR
BLK
RY3
POWER
TRANSFORMER
PRIMARY
INTERLOCK
SWITCH
Figure O-2. Oven Schematic-Cooking Condition
7
HIGH VOLTAGE
RECTIFIER
R-1200
R-1201
DESCRIPTION AND FUNCTION OF COMPONENTS
3. If the door is opened, and the secondary interlock relay
(RY2) and primary interlock switch contacts fail to open,
the monitor fuse blows simultaneously with closing of the
monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH,
SECONDARY INTERLOCK RELAY (RY2),
RELAY (RY1), PRIMARY INTERLOCK
SWITCH AND MONITOR SWITCH FOR
PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE").
NOTE: MONITOR FUSE AND SWITCH ARE REPLACED
AS AN ASSEMBLY
DOOR OPEN MECHANISM
The door is opened by pushing the open button on the
control panel, refer to the Figure D-1.
When the open button is pushed, the open button pushes up
the open lever, and then the open lever pushes up the latch
head. The latch heads are moved upward and released
from latch hook. Now the door will open.
Latch heads
Latch hook
Door sensing
switch
Door
TEMPERATURE FUSE (MG)
The temperature fuse located on the fan duct assembly is
designed to prevent damage to the magnetron if an over
heated condition develops in the tube due to cooling fan
failure, obstructed air guide, dirty or blocked air intake, etc.
Under normal operation, the temperature fuse remains
closed. However, the temperature fuse will open at 302˚F
(150˚C) causing the oven to shut down.
NOTE: This is a fuse. It does not reset.
Monitor switch
Open lever
Primary interlock switch
Figure D-1. Door Open Mechanism
DOOR SENSING AND PRIMARY INTERLOCK
SWITCHES
TEMPERATURE FUSE (CAVITY )
This temperature fuse is located on the top of the oven
cavity. It is designed to prevent damage to the oven unit if
the food in the oven catches fire due to overheating produced by improper setting of cooking time or failure of
control unit.
Under normal operation, the temperature fuse remains
closed. However, the temperature fuse will open at 302˚F
(150˚C) causing the oven to shut down. The defective
temperature fuse must be replaced with a new one.
The primary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the
secondary interlock system is mounted in the upper position of the latch hook. They are activated by the latch heads
on the door. When the door is opened, the switches interrupt the circuit to all components. A cook cycle cannot take
place until the door is firmly closed thereby activating both
interlock switches. The secondary interlock system consists of the door sensing switch and secondary interlock
relay located on the control circuit board.
TURNTABLE MOTOR
The turntable motor rotates the turntable located on the
bottom of the oven cavity, so that the foods on the turntable
cook evenly during cooking. Turntable will turn in either
direction. The turntable motor can be turned off by touching
TURNTABLE ON/OFF pad.
MONITOR SWITCH
The monitor switch is activated (the contacts opened) by the
latch head on the door while the door is closed. The switch
is intended to render the oven inoperative by means of
blowing the monitor fuse when the contacts of the secondary interlock relay (RY2) and primary interlock switch fail to
open when the door is opened.
COOLING FAN MOTOR
The cooling fan motor drives a blade which draws external
cool air. This cool air is directed through the air vanes
surrounding the magnetron and cools the magnetron. This air
is channelled through the oven cavity to remove steam and
vapors given off from the heating foods. It is then exhausted
through the exhausting air vents at the oven cavity.
Functions:
1. When the door is opened, the monitor switch contact
close (to the ON condition) due to their being normally
closed. At this time the secondary interlock relay (RY2)
and primary interlock switch are in the OFF condition
(contacts open) due to their being normally open contact
switches. And the contacts of relay (RY1) are in the ON
condition (contacts close).
2. As the door goes to a closed position, the monitor switch
contacts are first opened and then the door sensing
switch and the primary interlock switch contacts close.
(On opening the door, each of these switches operate
inversely.)
HOOD LAMP
The hood lamps are mounted at the hood lamp angle on
the base cover. The hood lamps can be turned off and on
by touching the ACCENT LIGHT pad or TASK LIGHT pad.
And also the brightness can be varied to high or low by
touching the ACCENT LIGHT pad or TASK LIGHT pad.
8
R-1200
R-1201
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.
9
R-1200
R-1201
CK = Check / RE = Replace
OFF
CONDITION
IDLE
CONDITION
MICROWAVE
COOKING
CONDITION
Home fuse blows when power cord
is plugged into wall receptacle.
Monitor fuse blows when power cord
is plugged into wall receptacle.
Display does not illuminate when
power cord is first plugged into wall
receptacle.
Display does not operate properly
when STOP/CLEAR pad is touched.
(The time of day should appear on
the display with beep sound during
normal condition.)
Oven lamp does not light with door is
opened.
Hood lights do not turn on when
ACCENT LIGHT pad or TASK
LIGHT pad is pressed.
Oven lamp does not light in cook
cycle. (But it does light when door is
opened.)
Fan motor does not operate. (Oven
lamp and turntable motor operate.)
Turntable motor does not operate
(Oven lamp lights and fan motor
operate.)
Oven does not go into cook cycle
when START pad is touched.
Oven seems to be operating but little
or no heat is produced in oven load.
(Food incompletely cooked or not
cooked at all at end of cook cycle.)
Oven goes into a cook cycle but
extremely
uneven
heating
is
produced in oven load (food).
Variable cooking does not operate
properly except Cooking Power 10
(P-HI) mode.
Oven goes into DEFROST CENTER
but food is not defrosted well.
10
LOW VOLTAGE
NO POWER AT OUTLET
SHORT IN POWER CORD
OPENED OR SHORTED WIRING
HOOD LAMP OR SOCKET
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP OR SOCKET
FOIL PATERN ON P.W.B.
DEFROST CENTER
RELAY (RY-4)
RELAY (RY-3)
RELAY (RY-2)
RELAY (RY-1)
KEY UNIT
J K L L L L M N RE RE RE RECK RE CK CK
CONTROL UNIT
MONITOR FUSE
MONITOR SWITCH
SECONDARY INTERLOCK SYSTEM
PRIMARY INTERLOCK SWITCH
H.V. RECTIFIER
PROBLEM
POWER TRANSFORMER
CONDITION
MAGNETRON
POSSIBLE CASE AND
DEFECTIVE PARTS
TEMPERATURE FUSE
A B C D E F G H I
HIGH VOLTAGE CAPACITOR
TEST PROCEDURE
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
A
COMPONENT TEST
MAGNETRON ASSEMBLY TEST
1.
2.
3.
4.
5.
6.
7.
8.
9.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check
across the magnetron filament leads should indicate less than 1 ohm.
To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads
and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance
the magnetron is grounded and must be replaced.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
MICROWAVE OUTPUT POWER
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted).
HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD
BE OBSERVED.
Power output of the magnetron can be measured by performing a water temperature rise test. This test
should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following
components or wiring: silicon rectifier, high voltage capacitor and power transformer. This test will require
a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple type
temperature tester. For accurate results, the following procedure must be followed carefully:
1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water with
a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through
the water until the temperature stabilizes. Record the temperature of the water.
2. Place the cup of water in the oven. Operate oven at POWER 10(HIGH) selecting more than 60
seconds cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand
of a watch or the digital read-out countdown.
3. Remove the cup from the oven and again measure the temperature, making sure to stir the
thermometer or thermocouple through the water until the maximum temperature is recorded.
4. Subtract the cold water temperature from the hot water temperature. The normal result should be 32
to 60˚F(18 to 33˚C) rise in temperature. If the water temperatures are accurately measured and tested
for the required time period the test results will indicate if the magnetron tube has low power output
(low rise in water temperature) which would extend cooking time or high power output (high rise in
water temperature) which would reduce cooking time. Because cooking time can be adjusted to
compensate for power output, the magnetron tube assembly should be replaced only if the water
temperature rise test indicates a power output well beyond the normal limits. The test is only accurate
if the power supply line voltage is 120 volts and the oven cavity is clean.
B
POWER TRANSFORMER TEST
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Disconnect the primary input terminals and measure the resistance of the transformer with an
ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance of
the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be
approximately 83 ohms; the resistance of the filament coil should be less than 1 ohm.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
11
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C
HIGH VOLTAGE RECTIFIER TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance
across the terminals and observe, reverse the leads to the rectifier terminals and observe meter
reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions,
the rectifier is probably defective and should be replaced.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
D
HIGH VOLTAGE CAPACITOR TEST
1.
2.
3.
4.
5.
6.
7.
8.
E
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads
and check for short or open between the terminals using an ohmmeter.
Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate
continuity for a short time and should indicate an open circuit once the capacitor is charged. If the
above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of
the terminals and case. If it is shorted, replace the capacitor.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
CAVITY TEMPERATURE FUSE TEST
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
A continuity check across the temperature fuse terminals should indicate a closed circuit unless the
temperature of the temperature fuse reaches approximately 302˚F(150˚C).
An open temperature fuse indicates overheating of the oven, exchange the temperature fuse and
check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check
for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
MAGNETRON TEMPERATURE FUSE TEST
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. A continuity check across the temperature fuse terminals should indicate a closed circuit. If the
temperature of the magnetron reaches approximately 302˚F(150˚C), the temperature fuse opens. An
open temperature fuse indicates overheating of the magnetron. Exchange the temperature fue and
check for restricted air flow to the magnetron, especially the cooling fan air guide.
5. Reconnect all leads removed from components during testing.
12
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE TEMPERATURE FUSE.
F
PRIMARY INTERLOCK SWITCH TEST
1.
2.
3.
4.
5.
6.
7.
8.
G
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the secondary interlock switch.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
SECONDARY INTERLOCK SYSTEM TEST
DOOR SENSING SWITCH
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. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the door sensing switch.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE: If the door sensing switch contacts fail in the open position and the door is closed, the cooling
fan motor, stirrer motor and oven light will be activated by RY1.
SECONDARY INTERLOCK RELAY (RY2)
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 two (2) wire leads from the male tab terminals of the Secondary Interlock Relay. Check
the state of the relay contacts using a ohmmeter. The relay contacts should be open. If the relay
contacts are closed, replace the circuit board entirely or the relay itself.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
H
MONITOR SWITCH TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Before performing this test, make sure that the primary interlock switch and the secondary interlock
relay are operating properly, according to the above Switch and Interlock system Test Procedures.
Disconnect the wire lead from the monitor switch (COM) terminal. Check the monitor switch operation
by using the ohmmeter as follows. When the door is open, the meter should indicate a closed circuit.
13
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
5.
6.
7.
8.
I
When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front
plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch is
pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch
may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch
(COM) terminal and check the
continuity of the monitor circuit.
Red
White/ White
Reconnect all leads removed from
components during testing.
Reinstall the outer case (cabinet). Screw Driver
Reconnect the power supply cord
after the outer case is installed.
Ohmmeter
Primary
Run the oven and check all
Interlock Switch
Monitor Switch
functions.
BLOWN MONITOR FUSE TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
If the monitor fuse is blown when the door is opened, check the secondary interlock relay, primary
interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before
replacing the blown monitor fuse.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTERLOCK RELAY, PRIMARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA016/KiT, even if
the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised
of a 20 ampere fuse and switch.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
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.
14
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord.
Open the door and block it open.
To discharge high voltage capacitor, wait for 60 seconds.
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.
Reconnect all leads removed from components during testing.
Re-install the outer case cabinet.
Reconnect the power supply cord.
Run the oven and check all functions.
15
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
L
G8
G7
G6
G5
G4
G3
G2
G9
5
4
3
2
1
POWER
LEVEL
MINUTE
PLUS
G12 G11 G10
COMPONENT TEST
0
9
8
7
6
STOP
CLEAR
START
HOT
WATER
DEFROST
CENTER
TASK
LIGHT
ACCENT
LIGHT
POPCORN
REHEAT
CENTER
KEEP
WARM
TIMER
CLOCK
FROZEN
FRESH
FROZEN
VEGETABLES VEGETABLES ENTREES
BAKED
POTATOES
RICE
GROUND
MEAT
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
RY1
RY2(COOK)
RY3
RY4
OPERATIONAL VOLTAGE
Approx. -27.9V D.C.
Approx. -26.9V D.C.
Approx. -27.9V D.C.
Approx. -27.9V 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.
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)
(2)
(3)
(4)
Open the door.
Place one cup of water in the center of the turntable tray in the oven cavity.
Close the door.
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.
16
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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".
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, replace
the defective parts.
1
3
T1
VRS1
N
a
RY1
d
RY2
(J1)
b
c
7) Reconnect all leads removed from components during testing.
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 ".
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
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.
17
CAUSE OR CORRECTION
R-1200
R-1201
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
8)
9)
10)
11)
12)
13)
14)
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.
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.
Symbol
VC
(1) Key Unit
(2) Control Unit (The Control unit consists of LSI Unit and
Power Unit)
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.
The principal functions of these units and the signals communicated among them are explained below.
4) Reset Circuit
A circuit to generate a signals which resetting the LSI to
the initial state when power is applied.
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.
Control Unit
Control unit consists of LSI, power source circuit, synchronizing signal circuit, reset circuit, buzzer circuit, relay circuit
indicator circuit and back light circuit.
7) Relay Circuit
To drive the magnetron, fan motor, turntable motor and
light the oven lamp and hood lamp.
1) LSI
This LSI controls the key strobe signal, relay driving
signal for oven function and indicator signal.
8) Indicator Circuit
This circuit consists of 22 segments and 3 common
electrodes using a Light Crystal Display.
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.
9) Back Light Circuit
A circuit to drive the back light (Light emitting diodes LD1LD4).
18
R-1200
R-1201
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
9-10
11-13
14
AN1-AN0
P57-P55
CNTR0
OUT
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).
Terminal not used.
Terminal not used.
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
Terminal not used.
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
P51-P50
19
P47
OUT
OUT
20
P46
IN
21
P45
IN
22
P44
IN
23
P43
IN
24
INT0
IN
Terminal not used.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cooking and "H" level while not cooking. In other
cooking modes (variable cooking) the signal
turns to "H" level and "L" level in repetition
according to the power level.
OFF
Maximum
out put
H : GND
ON
OFF
70% of maximum
out put
L : -5V
OFF
24 sec.
ON
H : GND
8 sec.
L : -5V
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.
25
26
27
P41
P40
RESET
OUT
IN
IN
28-29
P71-P70
OUT
Terminal not used.
Connected to GND through the pull-down resistor R100.
Auto clear terminal.
Signal is inputted to reset the LSI to the initial state when power is applied.
Terminal not used.
19
R-1200
R-1201
Pin No.
Signal
I/O
30
XIN
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
43-47
48-50
51-72
P15-P11
OUT
OUT
OUT
SEG24-SEG22
SEG21-SEG0
Description
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.
H : GND
OFF
To turn on and off relay(RY3). "L" level: During
L
ON
Hood lamp ON. "H" level: During Hood lamp
OFF.
Hood lamp driving signal.
H : GND
To turn on and off relay(RY4). " L " level: During
OFF
Hood lamp ON. "H" level: During Hood lamp
L
ON
OFF.
Terminal not used.
Terminal not used.
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 21 (51) ..................... SEG21 ( 1)
SEG 10 (62) ........................ SEG10 (12)
SEG 20 (52) ..................... SEG20 ( 2)
SEG 9 (63) ......................... SEG 9 (13)
SEG 19 (53) ..................... SEG19 ( 3)
SEG 8 (64) ......................... SEG 8 (14)
SEG 18 (54) ..................... SEG18 ( 4)
SEG 7 (65) ......................... SEG 7 (15)
SEG 17 (55) ..................... SEG17 ( 5)
SEG 6 (66) ......................... SEG 6 (16)
SEG 16 (56) ..................... SEG16 ( 6)
SEG 5 (67) ......................... SEG 5 (17)
SEG 15 (57) ..................... SEG15 ( 7)
SEG 4 (68) ......................... SEG 4 (18)
SEG 14 (58) ..................... SEG14 ( 8)
SEG 3 (69) ......................... SEG 3 (19)
SEG 13 (59) ..................... SEG13 ( 9)
SEG 2 (70) ......................... SEG 2 (20)
SEG 12 (60) .................... SEG12 (10)
SEG 1 (71) ......................... SEG 1 (21)
SEG 11 (61) .................... SEG11 (11)
SEG 0 (72) ......................... SEG 0 (22)
20
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Pin No.
Signal
I/O
73/74
75
76
77
VCC/VREF
AVSS
COM3
COM2
IN
IN
OUT
OUT
78
COM1
OUT
79
COM0
OUT
80
VL3
IN
Description
Connected to GND.
Connected to VC.
Terminal not used.
Common data signal: COM2.
Connected to LCD signal COM2.
Common data signal: COM1.
Connected to LCD signal COM1.
Common data signal: COM0.
Connected to LCD signal COM0.
Power source voltage input terminal.
Standard voltage for LCD.
21
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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
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.
22
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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 following parts;
1) High voltage parts:
Magnetron, Power transformer, High voltage
capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, Power transformer and Oven
cavity.
3) Sharp edge:
Base cover, Base plate R, 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 and Mounting lever.
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.
Please refer to ‘OVEN PARTS, CABINET PARTS, RIGHT PANEL PARTS, DOOR PARTS’, when carrying out any of the
following removal procedures:
THE FOLLOWING ADJUSTMENTS OR COMPONENT REPLACEMENT CAN BE PERFORMED
WITHOUT REMOVING THE OVEN FROM THE WALL
1. Hood lamps, sockets.
2. Base cover and hood lamp glass assembly.
3. Turntable motor.
4. Right panel parts
REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven)
1. Disconnect the power supply cord, and uncoil the power
supply cord.
2. To discharge the high voltage capacitor, wait for 60
seconds.
3. Remove the turntable tray and support from the oven cavity.
4. Remove the two (2) screws holding the oven (outer case
23
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R-1201
cabinet) to the top cabinet.
5. While supporting the front of the oven, pull down the two
(2) mounting levers and release the oven from the unit
mounting plate.
6. Pull the power cord out of the wall cabinet and remove
the oven.
7. The oven is now free and can be placed on the work
surface selected for servicing the oven.
8. Installation is the reverse of this procedure.
OUTER CASE REMOVAL
7. Nip the cord bushing with bushing pliers and release it
from the outer case cabinet.
8. Remove the cord bushing and the power supply cord
from the outer case cabinet.
9. Now, the power supply cord is free.
CAUTION: 1. DISCONNECT OVEN FROM POWER
SUPPLY BEFORE REMOVING OUTER
CASE.
2. DISCHARGE THE HIGH VOLTAGE
CAPACITOR BEFORE TOUCHING ANY
OVEN COMPONENTS OR WIRING.
Remove the oven from the wall, referring to "REMOVAL OF
OVEN FROM WALL" and proceed as follows;
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 the four (4) screws from the rear of the outer
case cabinet and one (1) screw at right side.
5. Slide the outer case cabinet back about 1 inch (3 cm) to
free it from retaining clips on the cavity face plate.
6. Disconnect the three (3) pin connector of the power
supply cord from the wiring harness and remove the
power supply cord together with the outer case.
POWER TRANSFORMER REMOVAL
Reinstall
1. Install by sliding the transformer on the base plate R with
its primary terminals toward the outer case.
2. Secure the transformer with two (2) screws to base plate
R.
3. Reconnect wire leads (primary and high voltage) to the
transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to
"PICTORIAL DIAGRAM".
4. Reinstall the outer case and check that oven is operating
properly.
CAUTION: MAKE SURE THE WIRE LEADS NEVER
TOUCH THE FAN BLADE.
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 main wire harness from transformer.
5. Disconnect high voltage wire A from the transformer.
6. Disconnect filament leads of transformer from the
magnetron and capacitor.
7. Remove two (2) screws holding the transformer to base
plate R.
MAGNETRON 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".)
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Disconnect the high voltage wire lead of the high voltage
rectifier assembly from the magnetron.
5. Disconnect the filament lead of the transformer from the
magnetron.
6. Remove the one (1) screw holding the magnetron duct
to the oven cavity top plate.
7. Remove the magnetron duct from the oven cavity, by
releasing the tab of the magnetron duct from the oven
cavity top plate.
8. Carefully remove four (4) mounting screws holding the
magnetron to waveguide. When removing the screws
hold the magnetron to prevent it from falling.
9. Remove the magnetron from the unit with care so the
magnetron tube should not be hit by any metal object
around the tube.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
MOUNTING SCREWS ARE TIGHTENED SECURELY.
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR 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".)
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Disconnect the high voltage wire lead with high voltage
rectifier from the magnetron.
5. Disconnect filament lead of the transformer from high
voltage capacitor.
24
R-1200
R-1201
10.Now, the high voltage rectifier assembly is free.
11.Remove capacitor from the holder.
12.Now, the high voltage capacitor is free.
CAUTION: WHEN REPLACING THE HIGH VOLTAGE
RECTIFIER ASSEMBLY, THE GROUND SIDE
TERMINAL MUST BE SECURED FIRMLY
WITH A GROUNDING SCREW.
6. Disconnect high voltage wire A from capacitor.
7. Remove the fan duct assembly from the oven cavity,
referring to the procedure of "COOLING FAN MOTOR
REMOVAL"
8. Remove one (1) screw holding capacitor holder and high
voltage rectifier to the fan duct.
9. Disconnect the high voltage rectifier assembly from the
high voltage capacitor.
TEMPERATURE FUSE (CAVITY) 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 wire leads from the temperature fuse
(cavity).
5. Remove the one (1) screw holding the temperature fuse
(cavity) to the oven cavity top plate.
6. Remove the temperature fuse (cavity) from the holder
at the oven cavity top plate.
7. Now, temperature fuse (cavity) is free.
TEMPERATURE FUSE (MAGNETRON) 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 wire leads from the temperature fuse
(Magnetron).
5. Remove the one (1) screw holding the temperature fuse
(Magnetron) to the fan duct.
6. Now, the temperature fuse (Magnetron) is free.
COOLING FAN MOTOR 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".)
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Disconnect the wire leads from the fan motor.
5. Disconnect the high voltage wire lead with the high
voltage rectifier from the magnetron.
6. Disconnect the filament lead of the transformer from the
high voltage capacitor.
7. Disconnect the high voltage wire A from the capacitor.
8. Release the wire leads from the hole of the fan duct.
9. Remove the one (1) screw holding the fan duct to the
magnetron.
10.Remove two (2) screws holding the fan duct to oven
cavity top plate and the base plate R.
11. Remove the fan duct assembly from the oven cavity.
12.Remove the fan blade from the fan motor shaft according
the following procedure.
13.Hold the edge of the rotor of the fan motor by using a pair
of groove joint pliers.
CAUTION:
* Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan motor
because the rotor is easily shaven by pliers and
metal pieces may be produced.
* Do not touch the pliers to the coil of the fan motor
because the coil may be cut or damaged.
*
Do not disfigure the bracket by touching with the
pliers.
14.Remove the fan blade from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
15. Now, the fan blade will be free.
CAUTION:
* Do not reuse the removed fan blade because the
hole (for shaft) may be larger than normal.
16.Remove the two (2) screws holding the fan motor to the
fan duct.
17.Now, the fan motor is free.
INSTALLATION
1. Install the fan blade to the fan motor shaft according to
the following procedure.
2. Hold the center of the bracket which supports the shaft
of the fan motor on the flat table.
3. Install the fan blade to the shaft of fan motor by pushing
the fan blade with a small, light weight, ball peen hammer
or rubber mallet.
4. Install the fan motor to the hood duct with the two (2) screws.
CAUTION:
* Do not hit the fan blade with excessive force when
installing because the bracket may be disfigured.
* Make sure that the fan blade rotates smooth after
installation.
* Make sure that the axis of the shaft is not slanted.
5. Install the fan duct to the oven cavity top plate and base
plate R with the two (2) screws.
25
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R-1201
6. Hold the fan duct to the magnetron with the one (1) screw.
7. Reconnect the wire leads to the fan motor, magnetron
and high voltage capacitor, referring to the pictorial
diagram.
8. Reinstall the wire leads to the hole of the fan duct.
9. Refer to procedure of "OUTER CASE REMOVAL". And
reverse their procedure. And reinstall the outer case.
Coil
Groove joint pliers
Shaft
Stator
Gap
Bracket
Shaft
Axis
Rotor
These are the positions
that should be pinched
with pliers
Stator
Rear View
Table
Center of
bracket
Rotor
Side View
TURNTABLE MOTOR AND FOOD LAMP SOCKETS 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 the one (1) screw holding the base cover to the
oven cavity back plate.
5. Remove the three (3) screws holding the base cover to
the oven cavity front face plate.
6. Open the base cover.
7. Release the two hood lamp sockets from the base cover.
8. Remove the base cover from the oven cavity by pulling
down and moving to the left slightly.
TURNTABLE MOTOR
9. Disconnect the wire leads from the turntable motor.
10.Remove one (1) screw holding turntable motor to the
oven cavity.
11.Now the turntable motor is free.
HOOD LAMP SOCKET
9. Screw the hood lamp off from the lamp socket.
10.Disconnect the wire leads from the lamp socket by
pushing the terminal hole of the lamp socket with the
small flat type screw driver.
11. Now, the lamp socket is free.
OVEN LAMP AND 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
POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
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. Push the lever of positive lock® connector.
5. Pull down on the positive lock® connector.
Positive lock®
connector
1
Push
Lever
2
CAUTION: WHEN CONNECTING THE POSITIVE LOCK®
CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK® SO THAT THE
LEVER FACES YOU.
Pull down
Positive lock ® connector
26
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R-1201
RIGHT PANEL ASSEMBLY AND POWER UNIT REMOVAL
7. Disconnect the connectors CN-A, CN-B and CN-C from
the control 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.
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.
DOOR SENSING SWITCH, PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH 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. Remove the right panel assembly, referring to the
procedure of "RIGHT PANEL ASSEMBLY AND POWER
UNIT REMOVAL".
5. Remove the two (2) screws holding the latch hook to the
oven cavity front flange.
6. Remove the latch hook from the oven cavity front flange.
7. Disconnect the wire leads of each switch.
8. Remove each switch from the latch hook by pushing the
one (1) stopper tab holding each switch.
9. Now, each switch is free.
Reinstall
1. Reinstall each switch in its place. The primary interlock
switch is in the lower position, door sensing switch is in
the upper position and the monitor switch is in the middle
position.
2. Reconnect wire leads to each switch. Refer to pictorial
diagram.
3. Secure the latch hook (with two (2) mounting screws) to
oven cavity front flange.
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and "Adjustment procedure".
DOOR SENSING SWITCH, PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
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. Remove the right panel assembly, referring to the
procedure of "RIGHT PANEL ASSEMBLY AND POWER
UNIT REMOVAL".
If the door sensing switch, primary interlock switch and
monitor switch do not operate properly due to a
misadjustment, the following adjustment should be made.
5. Loosen the two (2) screws holding latch hook to the oven
cavity front flange.
6. With door closed, adjust latch hook by moving it back and
forth, and up and down. In and out play of the door
allowed by the upper and lower position of the latch hook
should be less than 0.5mm. The vertical position of the
latch hook should be adjusted so that the door sensing
switch and primary interlock switch are activated with the
door closed. The horizontal position of the latch hook
should be adjusted so that the monitor switch is activated
with the door closed.
7. Secure the screws with washers firmly.
8. Check all of the switches operation. If any switch has not
activated with the door closed, loosen screw and adjust
the latch hook position.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in
the latched position. First check upper position of latch
hook, pushing and pulling upper portion of door toward
the oven face. Then check lower portion of the latch
hook, pushing and pulling lower portion of the door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
2. The door sensing switch and primary interlock switch
interrupt the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Reinstall outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Latch heads
Latch hook
Door sensing
switch
Door
Monitor switch
Open lever
Primary interlock switch
Figure C-1. Latch Switch Adjustments
27
R-1200
R-1201
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 9-pin wire harness from the power unit.
5. Release a snap band of the 9-pin wire harness from the
hole on the base plate R.
6. Remove the two (2) screws holding the bottom sash to
the oven cavity front face plate.
7. Remove the bottom sash with 9-pin wire harness from the
oven cavity front face plate. And remove the connecter
of the 9-pin wire harness from the long hole of the oven
cavity front face plate.
8. Remove the 9-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.
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
Note: When the individual parts are replaced, refer to
"Door Disassembly".
RE-INSTALL
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 9-pin wire harness into the bottom sash.
The 9-pin wire harness should be held by three (3) tabs
on the bottom sash. And the marking portion on the 9pin wire harness should be held by left tab as shown in
Figure C-3.
8. Insert the connector of the 9-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 9-pin wire harness to the power unit.
10. Insert the snap band of the 9-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
Lower
oven
hinge
Upper oven
hinge
Door assembly
Latch
heads
Upper door
stopper
Lower door
stopper
Lower door
hinge pin
Bottom
sash
9-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
9-pin wire
harness
Figure C-3. 9-pin wire harness and bottom sash
28
R-1200
R-1201
DOOR DISASSEMBLY
12.Releasing the two (2) lower tabs, remove the LSI unit
with the LCD holder from the door frame assembly.
13.Disconnect the 9-pin wire harness from the LSI unit.
14.Releasing the two (2) tabs, release the LCD from the
LCD holder.
15.Releasing the four (4) tabs, remove the LCD holder from
the LSI unit.
16.Now the LSI unit is free.
NOTE: For 9-pin wire harness
1. When the PWB cover is reinstalled, route the 9-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 9-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 9-pin wire harness should be held by
right tab on the door frame as shown in Figure C-5.
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.
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.
Screws
PWB cover
Hole
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.
Tabs
Marking
9-pin wire
harness
9-pin wire
harness
LSI unit
Tab
Tab
Tab
Tab
Door frame
Hole
Figure C-5. Door frame assembly
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.
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
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.
Lower
door stopper
Ribbon cable
Putty knife
Liquid Crystal
Display (LCD)
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.
Printed wiring board
of LSI unit
Choke cover
Tab
Cushion
Figure C-6. LSI unit
29
1
2
3
30
BRN 1
ORG 3
RED 2
YLW 4
GRN 5
BLU 6
PPL 7
GRY 8
RY2:
COM.
N.O.
N.O.
T1
1
1
CN-A
5
4
5
2
N.O.
CN-C
IC1
8
G
R
Y
9
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
1
LSI UNIT
CN-G
BRN
COM.
5
GRY
WHT
WHT
E
BRN
HOOD LAMP &
SOCKET
WHT
GRN
ORG
HOOD LAMP &
SOCKET
WHT
WHT
Blue Marking
to Base Plate Right
GRN
GRN
TURNTABLE
MOTOR
Figure S-1. Pictorial Diagram
MONITOR
SWITCH
COM.
WHT
WHT
RED
WHT
WHT
RED
RED
BLK
GRY
BLK
BLK
FAN
MOTOR
RED
WHT
MAGNETRON
TEMPERATURE
FUSE
RED
POWER
TRANSFORMER
MAGNETRON
HIGH VOLTAGE
RECTIFIER
HIGH VOLTAGE
CAPACITOR
HIGH VOLTAGE
WIRE A
HIGH VOLTAGE COMPONENTS
OVEN LAMP &
SOCKET
Blue
Marking
RED
Power Supply
cord 120V 60Hz
4
1
PRIMARY
INTERLOCK
SWITCH
CN-A
RED
2
3 ORG
4
1
N.C.
RED
WHT
BLK
CAVITY
TEMPERATURE
FUSE
GRN 1 GRN
3
1
CN-C B
R
N
RY3
RY4
RY2: SECONDARY INTERLOCK RELAY
9-PIN WIRE HARNESS
R
E
D
RED
BLK
BLK
WHT
COM.
BLK
2
WHT 9
CN-C
H
CN-B
D
WHT
CN-C
9
1 RED
2 GRN
FUSE &
HOLDER
C
RY1
G
POWER UNIT
F
2
1
RED
3 BLK
WHT 2 WHT
BLK
B
GRN
RED
1
GRY
GRY
CN-B
COM.
RED
A
DOOR SENSING SWITCH
N.O.
R-1200
R-1201
5
6
A
B
C
6
D
E
F
G
H
R-1200
R-1201
2
1
4
3
6
5
A
A
T1
D2
b
+
–
R1
240 1w
(J1)
C
–
c
COM
Q21
KRC243M
RY1
N.O
AC(H)
COM
MICRO
RY2
E
A3
HOOD LAMP
COMMON
A1
C3
INT
C4
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
C6
BUZZER
C5
MICRO
C7
HOOD
LAMP
Q22
KRA101M
RY3
E
HOOD
LAMP
D24
1SS270A
HOOD LAMP
C
D
D23
1SS270A
HOOD LAMP
VA
+
D22
1SS270A
D
C2
R2
240 1w
C21
10µ/35v
D21
1SS270A
N.O
AC(N)
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
GND
R4 3.3k
D4
SP1
PKM22EPT
8
C1
C2 470µ/50v
VRS1
10G471K
3
B
CN-C
D1
D3
d
a
D1-D4
1N4002
5
C1 0.1µ/50v
1
B
A5
C8
HOOD
LAMP
C9
DOOR
SENSING
SWITCH
RY4
CN-A
B-2
D20 1SS270A
F
DOOR
SENSING
SWITCH
D40 1SS270A
F
B-1
CN-B
G
G
NOTE
: IF NOT SPECIFIED, 1/4W ± 5%
H
H
Figure S-2. Power Unit Circuit
1
2
4
3
31
5
6
C8
HOOD LAMP
C9
C7
HOOD LAMP
C5
C4
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
DOOR
SENSING
SWITCH
C6
BUZZER
MICRO.
C3
INT
C2
4
R40 4.7k
C1 0.1µ/50v
NOTE :
R20 1k
G
F
C20
0.1µ
/50v
: IF NOT SPECIFIED, 1/16W ± 5%
R41 15k
Q23 DTA143EKA
Q22 DTA143EKA
Q21 DTA143EKA
Q30 DTA143EKA
Q10 DTA143EKA
R9 680 1/2w
LD1 LD2 LD3 LD4
C10
0.1µ
/50v
VA
R10 15k
R1 82
C40
0.01µ
/25v
R3 4.7k
C11 0.01µ/25v
–
+
R5 15k
R68 15k
Q2
2SA1037AK
R69 15k
R4 1k
UDZ4.3B
ZD1
5
C3 0.01µ/25v
R6 4.7k
25
26
COOK
G6
3
8
G7
4
9
KEY UNIT
BAKED
POTATOES
RICE
GROUND
MEAT
FROZEN
FRESH
FROZEN
VEGETABLES VEGETABLES ENTREES
0
5
G8
80
VL2
VL1
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P57
P56
P55
CNTR0
P53
P52
P51
P50
P47
P46
P45
P44
P43
INT0
24
1
VC
GND
DEFROST
IC1
POPCORN
HOT
WATER
7
2
G5
40
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
41
65
CF1
CSTS4.00MG03
G2
MINUTE
PLUS
START
ACCENT
LIGHT
TIMER
CLOCK
G3
POWER
LEVEL
STOP
CLEAR
TASK
LIGHT
KEEP
WARM
G4
1
6
DEFROST
CENTER
REHEAT
CENTER
G
F
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
1
NO.
LBS.
CUPS.
KGOZ.
SENSOR AUTO %
LIQUID CRYSTAL DISPLAY
G1
5
4.7k
4.7k
Figure S-3. LSI Unit Circuit
R75 270k
R74 270k
R73 270k
R72 270k
C63 330p/50v
C62 330p/50v
C61 330p/50v
C60 330p/50v
(J12)
(J13)
R2 4.7k
Q1
2SA1037AK
C4
0.01µ
/25v
R70 15k
(J14)
(J15)
C1
(J10)
(J11)
R71 15k
(J16)
(J17)
GND
4.7k
G9
CPU UNIT
4
G12 G11 G10
COM0(LCD)
COM1(LCD)
COM2(LCD)
R7 4.7k
R8 4.7k
R100
15k
R67
15k
32
R66
15k
3
R65
15k
2
VL3
COM0
COM1
COM2
COM3
AVSS
VREF
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
H
P41
P40
RESET
P71
P70
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
G
R62
15k
1
COM0
COM1
COM2
NC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
F
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
E
R64
15k
C
R80
1M
D
COM0(LCD)
COM1(LCD)
COM2(LCD)
B
3
R63
15k
A
2
R61
15k
1
R60
15k
CN-C
R-1200
R-1201
6
A
B
C
6
D
E
F
G
H
4.7k
C2 47µ/16v
R-1200
R-1201
1
2
4
3
5
6
A
A
B
B
CN - F
3
R53
1
DIP
8
R54
5
C50
R51
1
C
2
CN - C
R4
11
1
CN - B
E
Q22
SP1
1
D20
B
C51
4
2
IC-1
(J2)
R52
R50
D40
C
D21
C3
D
1
BFB
ZD1
RY1
B
3
E
C21
E
Q21
D
R2
R1
R5
R3
Q1
C2
C1
D2
D1
1
VRS1
E
QKITPB036MRE0
E
5
P
(J1)
S
F
F
8
T1
5
LOT NO
D4
D3
3
RY2
RY4
G
CN - A
D22
G
D23
4
D24
1
RY3
H
H
Figure S-4. Printed Wiring Board
1
2
4
3
33
5
6
R-1200
R-1201
PARTS LIST
Note: The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
PART NO.
§
FH-DZB016MRY0
RC-QZB018MRE0
QFS-TA013WRE0
RMOTDA211WRE0
QFS-TA014WRE0
RMOTEB031MRE0
RTRN-B068MRE0
RV-MZA288WRE0
QFSHDB003MRE0
QSW-MA085WRE0
FFS-BA016/KIT
FACCDB011MRE0
QSOCLB006MRE0
RLMPTA068WRE0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
"§" MARK: PARTS DELIVERY SECTION
DESCRIPTION
Q'TY CODE
ELECTRIC PARTS
*
*
*
∆*
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
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
Oven lamp
1
1
1
1
1
1
1
1
1
2
1
1
3
3
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
1
1
1
1
1
1
1
4
5
1
1
1
2
1
2
2
1
1
1
1
1
1
1
1
1
2
AZ
AG
AB
AF
AB
AE
AB
AD
AA
AA
AB
AB
AB
AA
AG
AG
AG
AS
AE
AR
AR
AE
AE
AA
AG
AB
1
1
1
1
1
1
1
AH
AN
AN
AB
AF
AD
--
CABINET PARTS
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-1200]
Bottom sash [R-1201]
Base plate R
Outer case cabinet [R-1200]
Outer case cabinet [R-1201]
Schematic diagram
Hood lamp glass assembly [R-1200]
Hood lamp glass assembly [R-1201]
Hood lamp glass angle [R-1200]
Hood lamp glass angle [R-1201]
Hood lamp glass
Base cover [R-1200]
Base cover [R-1201]
3- 1
3- 1A
3- 1B
3- 1C
C1
C2
C21
D1-4
D20-24
D40
Q21
Q22
R1-2
R4
RY1-2
RY3-4
SP1
T1
VRS1
3- 2
3- 2
3- 3
3- 3
3- 4
3- 5
3- 6
DPWBFB102MRU0
QCNCMA017JDZZ
QCNCMA275DRE0
QCNCMA470DRZZ
RC-KZA087DRE0
VCEAB31HW477M
VCEAB31VW106M
RH-DZA006PRE0
VHD1SS270A/-1
VHD1SS270A/-1
VSKRC243M//-3
VSKRA101M//-3
VRS-B13AA241J
VRD-B12EF332J
RRLY-A113DRE0
RRLY-B004MRE0
RALM-A014DRE0
RTRNPB017MRE0
RH-VZA032DRE0
HPNLCB150MRF0
HPNLCB151MRF0
JBTN-B116MRF0
JBTN-B117MRF0
MSPRTA050WRE0
PSHEPB076MRR0
XEPSD30P10XS0
M
M
J
J
J
J
J
J
J
J
J
J
J
J
M
M
J
M
J
M
M
M
M
M
M
M
Power unit
3-pin connector CN-A
2-pin connector CN-B
9-pin connector CN-C
Capacitor
0.1 uF
Capacitor
470 uF
Capacitor
10 uF
Diode (1N4002)
Diode (1SS270A)
Diode (1SS270A)
Transistor (KRC243M)
Transistor (KRA101M)
Resistor
240 ohm
Resistor
3.3k ohm
Relay (DU24D1-1PR(M))
Relay (FTR-F3AA024E)
Buzzer (PKM22EPT)
Transformer
Varistor (10G471K)
Right panel [R-1200]
Right panel [R-1201]
Open button [R-1200]
Open button [R-1201]
Button spring
Menu label
Screw; 3mm x 10mm
RIGHT PANEL PARTS
50V
50V
35V
1W
1/4W
OVEN PARTS
∆
4444444-
1
2
3
4
5
6
7
PDUC-B118MRF0
FROLPB025MRK0
NTNT-A095WRE0
LBNDKB009MRP0
PDUC-B111MRF0
MLEVPB016MRF0
*************
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)
34
R-1200
R-1201
∆
REF. NO.
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
PART NO.
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
DESCRIPTION
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
CDORFB291MRK0
CDORFB292MRK0
FDORFB072MRT0
FCOV-B196MRK0
FCOV-B197MRK0
LSTPPB023MRF0
MSPRTA046WRE0
FUNTKB327MRE0
FUNTKB328MRE0
FW-VZB191MRE0
PCOVPB098MRP0
PCUSGB045MRP0
DUNT-B046MRK0
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-1200]
Door assembly [R-1201]
Door panel assembly
Door frame assembly [R-1200]
Door frame assembly [R-1201]
Latch head
Latch spring
Key unit [R-1200]
Key unit [R-1201]
9-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
6- 9
6-10
CFZK-B460MRK0
LBSHC0040MRE0
LX-BZ0195WRE0
LX-MZB001MRE0
XBRSD50P60000
XOTSD40P12000
XTSSD50P35000
XWHSD50-16300
LANG-B003MRP0
TINSEB298MRK0
TINSKB082MRR0
FW-VZB188MRE0
QW-QZB025MRE0
FW-VZB190MRE0
TCAUAB041MRR0
TCAUAB037MRR0
TCAUAB005MRR0
M
M
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
Monitor caution label
Revised DHHS/GRD C/label
7777777777-
XOPSD40P12000
XOTSF40P12000
XOTSE40P12000
XOTSD40P12000
XHTSD40P08RV0
LX-CZA038WRE0
LX-CZ0052WRE0
LX-BZA041WRE0
XCBSD30P08000
XOTSD40P08000
M
M
M
M
M
M
M
M
M
M
Screw :
Screw :
Screw :
Screw :
Screw :
Special
Special
Special
Screw :
Screw :
Q'TY CODE
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
DOOR PARTS
∆
∆
∆
∆
∆
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
4
BK
BK
AW
BE
BE
AC
AB
AP
AP
AG
AD
AB
AU
AC
AC
AD
AB
AB
AB
AG
AE
AA
1
1
4
1
2
3
6
2
2
1
1
1
1
1
2
1
1
AH
AC
AC
AB
AA
AA
AA
AA
AE
AE
AE
AT
AT
AU
AA
AA
AB
7
6
6
8
2
5
2
5
3
1
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
MISCELLANEOUS
SCREWS, NUTS AND WASHERS
1
2
2
3
4
5
6
7
8
9
4mm x
4mm x
4mm x
4mm x
4mm x
screw
screw
screw
3mm x
4mm x
12mm
12mm [R-1200]
12mm [R-1201]
12mm
8mm
8mm
8mm
35
R-1200
R-1201
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.
2
1
4
3
6
5
RIGHT PANEL PARTS
A
7-2
A
3-6
3-1
4-18
5
4-19
DOOR PARTS
B
5-5
3-5
5-4
3-2
C
3-4
3-3
B
5-3
5-1
C
5-2-13
5-2-7
5-5
5-2-5
5-2-11
5-2-4
D
D
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
G
G
6-1-2
6-1-6
6-5
6-1-7
6-1-3
6-2
H
H
1
2
4
3
36
5
6
R-1200
R-1201
2
1
4
3
6
5
OVEN AND CABINET PARTS
A
A
4-10
7-3
7-5
1-12
2-3
4-12
4-1
7-5
7-5
B
7-8
7-1
B
B
1-5
7-5
2-4
4-17
A
7-1
C
C
4-16
4-17
7-2
4-13
6-10
7-8
4-3
7-1
D
;;;;;;
;;;;;
;
;;;;
;;;;;
;;;;;;;;;
;;;;;
;;;;;;
;;;;;;;;;
;B
;;;;;;
;;;;;
;
;
;
;;;;;
;;;;
;;;;;;;
;
;
;;
;;;;;;
;
;;;;
4-7
4-2
7-3
E
D
1-3
7-5
7-1
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
7-8
F
1-11
1-9
7-3
F
1-10
1-7
1-11
1-13
1-14
7-7
1-13
7-9
4-23
4-22
6-8
5-2-4
4-24
G
G
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
37
5
6
R-1200
R-1201
1
2
4
3
6
5
4-3 TURNTABLE TRAY
PACKING AND ACCESSORIES
A
A
TOP PAD
SPADBB043MRE0
B
C
B
6-4 TOP & WALL TEMPLATE
DOOR PROTECTOR
SPADP0221MRE0
C
6-3
WRAP COVER
SSAKH0103MRE0
OPERATION MANUAL
6-1 INSTALL MATERIAL ASSEMBLY
D
D
ACCESSORY PACK
SSAKAB004MRE0
E
E
BOTTOM PAD
F
F
SPADBB044MRE0
Non-replaceable items
G
G
PACKING CASE
SPAKCB324MRR1 [R-1200]
SPAKCB324MRR2 [R-1201]
H
H
1
2
4
3
5
6
COPYRIGHT © 2001 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.
'01 SHARP CORP. (12S1.730E) Printed in U.S.A
38