R-23GT-F R-24GT-F SERVICE MANUAL

R-23GT-F
R-24GT-F
SERVICE MANUAL
S0512R24GTF//
COMMERCIAL
MICROWAVE OVENS
MODELS
DOUBLE
QUANTITY
EXPRESS
DEFROST
11
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
9
19
1800W/R-24GT
20
SELECTATIME
SET
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.
0
STOP/CLEAR
SELECTAPOWER
CHECK
R-23GT-F
R-24GT-F
START
SIGNAL
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. (High Voltage Capacitor, High Voltage Power
Transformer, Magnetron, High Voltage Rectifier Assembly, High
Voltage Harness etc..)
R-24GT-F
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVER
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONEL .................................................................................................................. 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD .......................................................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLE SHOOTING GUIDE/ TEST PROCEDURE ........................................................................................ 11
TOUCH CONTROL PANEL ................................................................................................................................. 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 31
PICTORIAL DIAGRAM ........................................................................................................................................ 37
CONTROL PANEL CIRCUIT ............................................................................................................................... 38
PRINTED WIRING BOARD ................................................................................................................................. 40
PARTS LIST ........................................................................................................................................................ 41
PACKING AND ACCESSORIES ......................................................................................................................... 46
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-23GT-F
R-24GT-F
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 the 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.
R-23GT-F
R-24GT-F
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 two high voltage capacitors.
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 ,
and then remove
outer case.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
WARNING: RISK OF ELECTRIC SHOCK.
DISCHARGE THE TWO HIGH
VOLTAGE CAPACITORS BEFORE
SERVICING.
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.
The high-voltage capacitors remain charged about 60 seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the highvoltage capacitors (that are the connecting lead of the highvoltage rectifiers) against the chassis with the use of an
insulated screwdriver.
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 re-examine the connections to the component being tested.
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 two high voltage capacitors.
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 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-23GT-F
R-24GT-F
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 relay and door sensing switch shall prevent microwave radiation emission in excess
of the requirement as above mentioned, secondary interlock 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 secondary interlock switch does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
2
R-23GT-F
R-24GT-F
SERVICE MANUAL
PRODUCT DESCRIPTION
COMMERCIAL
MICROWAVE OVEN
GENERAL INFORMATION
R-23GT-F/ R-24GT-F
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the SHARP
MICROWAVE OVENS, R-23GT-F/ R-24GT-F.
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.
OPERATION
TROUBLESHOOTING GUIDE AND
TEST PROCEDURE
TOUCH CONTROL PANEL
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 no other visible damage with the oven.
Servicing and repair work must be carried out only by trained service
personnel.
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
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
PARTS LIST
R-23GT-F
R-24GT-F
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
R-23GT-F: 230/208 Volts 2.5 kW Approx. 13.3 A at 208 V / Approx. 11.9 A at 230 V
R-24GT-F: 230/208 Volts 2.9 kW Approx. 14.6 A at 208 V / Approx. 13.1 A at 230 V
60 Hertz / Single phase, 3 wire grounded
Power Output
R-23GT-F: 1600 watts
R-24GT-F: 1800 watts
Case Dimensions
Width 20-1/8" (510mm)
Height 13-1/4" (335mm) Depth 18-1/2" (470mm)
Cooking Cavity Dimensions
Width 13" (330mm)
Height 7-1/8" (180mm)
Control Complement
Touch Control System
Digital Display
10 Number Pads
STOP/CLEAR pad
START pad
SELECTAPOWER pad (Power level: 0 to 100%)
SELECTATIME pad
DOUBLE QUANTITY pad
EXPRESS DEFROST pad
Memory SET pad
Memory CHECK pad
SIGNAL pad
Weight
R-23GT-F: Approx. 63 lbs (29 kg )
Safety Standard
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
NSF Certified
(IEC 705 Test Procedure) Operating frequency of 2450MHz
Depth 13" (330mm)
R-24GT-F: Approx. 65 lbs (30 kg)
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing
an escape wire for the electric current. This appliance is equipped with a cord having a grounding wire with a grounding plug. The
plug must be plugged into an outlet that is properly installed and grounded.
WARNING: Improper use of the grounding plug can result in a risk of electric shock. The electrical requirements are 230/208 Volt,
60 Hz, AC only, 15 Amp or more (R-23GT-F) and 20 Amp or more (R-24GT-F) fused electrical supply. It is
recommended that a separate circuit serving only this appliance be provided. When installing this appliance, observe
all applicable codes and ordinances. If it is necessary to use an extension cord, use only a 3-wire extension cord that
has a 3-blade grounding plug and a 3-slot receptacle that will accept the plug on the appliance. The marked rating
of the extension cord should be AC 230/208 Volt 15 Amp (R-23GT-F) and 20 Amp (R-24GT-F).
Receptacle Box Cover
Receptacle Box Cover
3-Pronged plug
(6-20P)
3-Pronged plug
(6-20P)
3-Pronged, Receptacle
(6-15R)
3-Pronged, Receptacle
(6-20R)
230/208V 15A
R-23GT-F
230/208V 20A
R-24GT-F
4
R-23GT-F
R-24GT-F
VOLTAGE SELECT
The oven has been preset for 230V operation.
If you need to change this oven for 208V operation, follow instructions below.
1. Unplug oven.
2. Remove one screw(A) from the Voltage Select Cover located on back of the oven
near the bottom.
3. Remove the Voltage Select Cover and rotate 180 degrees.
4. Reinstall the Voltage Select Cover using one screw(A) removed in Step 2.
5. Plug power cord into wall outlet.
Power supply
cord
208 V
Your oven is now ready for 208V, 60Hz operation.
Note: If “EE4” or “EE5” appears in the lighted digital display, a voltage adjustment
must be made.
230 V (A)
230 V
208 V
OVEN DIAGRAM
10
9
5
4 3
2
16
17
1
13
15
12
11
1. Touch control panel
2. Door latch openings
3. Ceramic shelf
4. Splash cover
5. Oven light
6. Air intake filter
7. Air intake openings
8. Door seals and sealing surfaces
9. Door hinges
10. Oven door with see-through window
11. Door latches
12. Door handle
13. Service window for replacing the oven
light bulb.
14. Ventilation openings
15. Power supply cord
16. Mounting plate
17. Screw for mouning plate
18. Voltage select cover
14
18
8
7
6
ON DEF NO. X2 CHECK
19
Control Panel
19. DOUBLE QUANTITY pad
20. EXPRESS DEFROST pad
21. Ten number pads for time and memory
programming
22. SELECTATIME pad
23. STOP/CLEAR pad; touch to stop
operation of oven and clear remaining
heating time
24. SELECTAPOWER pad for setting variable
power level
25. START pad; touch to operate oven after
door is closed and time is set
26. SET pad for setting memory
27. CHECK pad for checking memory
28. SIGNAL pad for setting signal sound
22
24
26
DOUBLE
QUANTITY
EXPRESS
DEFROST
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
0
SELECTATIME STOP/CLEAR
SELECTAPOWER
SET
CHECK
27
5
11
START
SIGNAL
20
21
23
25
28
R-23GT-F
R-24GT-F
OPERATION
DESCRIPTION OF OPERATING SEQUENCE
7. The monitor switch (1) is electrically monitoring the operation
of the secondary interlock switch (1) and primary interlock
relay (1), and monitor switch (2) is electrically monitoring the
operation of the secondary interlock switch (2) and primary
interlock relay (2), and monitor switches (1), (2) are
mechanically associated with the door so that it will function
in the following sequence.
(1) When the door opens from a closed position, the contacts
of the primary interlock relays (1), (2) and secondary
interlock switches (1), (2) open. Then the monitor switch
contacts close.
(2) When the door is closed from the open position, the monitor
switches (1), (2) contacts first open, and then the contacts
of the secondary interlock switches (1), (2) close.
If the secondary interlock switches (1), (2) and primary interlock
relays (1), (2) fail with their contacts closed when the door is
opened, the closing of the monitor switches (1), (2) contacts will
form a short circuit through the monitor fuse, secondary interlock switches (1), (2) and primary interlock relays (1), (2),
causing the monitor fuse to blow.
The following is a description of component functions during
oven operation.
OFF CONDITION
Closing the door activates the door sensing switch and secondary interlock switches (1), (2). (In this condition, the monitor
switches (1) & (2) contacts are opened.) When the oven is
plugged in, and the rated voltage is supplied to the control unit
through the noise filter, (figure O-1), the display will show " .
".
IDLE CONDITION
When the door is opened, the contacts of the door sensing
switch open, initiating the following:
1. A signal is input to the control unit energizing the coil of shutoff relay (RY-1).
2. The shut-off relay (RY-1) contacts close completing circuits
to turn on the oven lamp, blower motor and stirrer motors.
3. If the door remains open, 60 seconds later the control unit
de-energizes shut-off relay (RY-1) turning off the oven
lamp, blower motor and stirrer motors.
When the door is closed, the door sensing switch contacts
close. With the closing of the door sensing switch contacts, an
additional circuit is provided which will permit the operation of
the oven when one of the touch pads is depressed. Since the
control is enabled through the door sensing switch, the door
must be closed before the touch pads will be effective. When
the door is closed, a full 60 second IDLE condition is always
provided for selecting and pressing the desired touch pads. A
60 second IDLE condition will also follow the end of each cook
cycle.
VARIABLE POWER COOKING
When Variable Cooking Power is programmed, the rated
voltage A.C. is supplied to the power transformer intermittently
through the contacts of relay (RY-2, RY-3). Relays RY-2 and
RY-3 are operated by the control unit within an interval second
time base. Microwave power operation is as follows:
POWER LEVEL
100%
ON TIME
OFF TIME
32 sec.
0 sec.
90%
30 sec.
2 sec.
COOKING CONDITION
80 %
26 sec.
6 sec.
When the door is closed from the open position and Memory
pad is touched the, following will occur:
70%
24 sec.
8 sec.
60%
22 sec.
10 sec.
50%
18 sec.
14 sec.
1. The contacts of relays are closed and components connected
to the relays are turned on (For details, refer to Figure O-3)
2. Rated voltage is supplied to the primary winding of the
power transformer and is converted to about 3.1 volts
output on the filament winding, and approximately 2040
volts 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 feed-box,
and then into the cavity where the food is placed to be
cooked.
5. Upon completion of the cooking time, the oven will revert to
the IDLE condition.
6. When the door is opened during a cook cycle, monitor
switches (1) & (2), door sensing switch, secondary interlock
switches (1), (2) and primary interlock relays (1), (2) are
activated with the following results. The circuits to the high
voltage components are de-energized, and the digital readout displays " . " and cooking is cancelled (in the case of
Memory cooking).
40%
16 sec.
16 sec.
30%
12 sec.
20 sec.
20%
8 sec.
24 sec.
10%
6 sec.
26 sec.
0%
0 sec.
32 sec.
Note: The ON/OFF time ratio does not exactly correspond
with the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
6
R-23GT-F
R-24GT-F
TWO MAGNETRON OPERATION SYSTEM
OPERATION OF
MAGNETRON
Two magnetrons (1), (2) are equipped in order to get higher
microwave power output. The primary windings of the power
transformers (1), (2) are connected so that each magnetron
can be oscillated alternatively according to the frequency of the
power supply. Refer to the Figure B-1.
COMMERCIAL
FREQUENCY
(60HZ)
POWER OUTPUT
BY MAGNETRON 1
POWER OUTPUT
BY MAGNETRON 2
Figure B-1. Operation of Magnetron
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED OR 1 MINUTE AFTER COOK OFF
2. " . " APPEARS ON DISPLAY
NOISE
FILTER
PRIMARY
INTERLOCK
RELAY (1)
POWER
TRANSFORMER (1)
DOOR SENSING
SWITCH
B3
OL
STIRRER MOTOR
OL
SM
BM
BLOWER MOTOR
3300pF
SM
COM
VOLTAGE SELECT
SWITCH (V.S.SW) (2)
MONITOR SWITCH (1)
POWER
TRANSFORMER (2)
COM
NC
SECONDARY INTERLOCK
SWITCHE(1)
SECONDARY INTERLOCK
SWITCHE(2)
Figure O-1. Oven Schematic-OFF Condition (208 V Condition)
7
CAPACITOR (1)
0.94µF
CAPACITOR (2)
0.94µF
MAGNETRON (2)
NC
B1
V.S.SW (3)
V.S.
SW (1)
B2
OVEN
THERMISTOR (1)
A3
H3
A5
OVEN LAMP
A1
MONITOR SWITCH (2)
MAGNETRON THERMISTOR
OVEN
THERMISTOR (2)
RY2
H1
RY1
RY3
TAB2
TAB1
3300pF
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR 1.0 F AC250V
A7
WHT
GRN
DISCHARGE RESISTOR 470K 1/2W
208/230V 60Hz
NC
COM
H.V. RECTIFIER (1)
BLK
PRIMARY
INTERLOCK
RELAY (2)
MAGNETRON (1)
MAGNETRON
TEMP. FUSE (2)
OVEN
TEMP.
FUSE
H.V. RECTIFIER (2)
FUSE 20A
MAGNETRON
TEMP. FUSE (1)
R-23GT-F
R-24GT-F
SCHEMATIC
NOTE: CONDITION OF OVEN
1. FOR 1MINUTE AFTER DOOR OPENED.
2. " . " APPEARS ON DISPLAY.
NOISE
FILTER
PRIMARY
INTERLOCK
RELAY (1)
POWER
TRANSFORMER (1)
DOOR SENSING
SWITCH
B3
OL
OL
SM
SM
BM
BLOWER MOTOR
3300pF
STIRRER MOTOR
COM
VOLTAGE SELECT
SWITCH (V.S.SW) (2)
MONITOR SWITCH (1)
CAPACITOR (1)
0.94µF
POWER
TRANSFORMER (2)
V.S.SW (3)
NC
B1
OVEN
THERMISTOR (1)
V.S.
SW (1)
B2
H3
A3
A5
OVEN LAMP
A1
MONITOR SWITCH (2)
MAGNETRON THERMISTOR
OVEN
THERMISTOR (2)
RY2
H1
RY1
RY3
TAB2
TAB1
3300pF
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR 1.0 F AC250V
A7
WHT
GRN
DISCHARGE RESISTOR 470K 1/2W
208/230V 60Hz
NC
COM
H.V. RECTIFIER (1)
BLK
PRIMARY
INTERLOCK
RELAY (2)
COM
NC
CAPACITOR (2)
0.94µF
SECONDARY INTERLOCK
SWITCHE(1)
MAGNETRON (2)
OVEN
TEMP.
FUSE
MAGNETRON (1)
MAGNETRON
TEMP. FUSE (2)
H.V. RECTIFIER (2)
FUSE 20A
MAGNETRON
TEMP. FUSE (1)
SECONDARY INTERLOCK
SWITCHE(2)
Figure O-2. Oven Schematic-IDLE Condition (208 V Condition)
SCHEMATIC
NOTE: CONDITION OF OVEN
DOOR CLOSED.
SELECTATIME PAD TOUCHED.
COOKING TIME PROGRAMMED.
START PAD TOUCHED.
NOISE
FILTER
PRIMARY
INTERLOCK
RELAY (1)
POWER
TRANSFORMER (1)
BLK
PRIMARY
INTERLOCK
RELAY (2)
NC
DOOR SENSING
SWITCH
B3
OL
OL
SM
SM
BM
BLOWER MOTOR
STIRRER MOTOR
COM
3300pF
B1
MONITOR SWITCH (1)
VOLTAGE SELECT
SWITCH (V.S.SW) (2)
COM
NC
SECONDARY INTERLOCK
SWITCHE(1)
SECONDARY INTERLOCK
SWITCHE(2)
Figure O-3. Schematic-Cooking Condition (208 V Condition)
8
CAPACITOR (1)
0.94µF
POWER
TRANSFORMER (2)
V.S.SW (3)
V.S.
SW (1)
B2
OVEN
THERMISTOR (1)
A3
H3
A5
OVEN LAMP
A1
MONITOR SWITCH (2)
MAGNETRON THERMISTOR
OVEN
THERMISTOR (2)
RY2
H1
RY1
RY3
TAB2
TAB1
3300pF
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR 1.0 F AC250V
A7
WHT
GRN
DISCHARGE RESISTOR 470K 1/2W
208/230V 60Hz
NC
COM
CAPACITOR (2)
0.94µF
MAGNETRON (2)
OVEN
TEMP.
FUSE
MAGNETRON (1)
MAGNETRON
TEMP. FUSE (2)
H.V. RECTIFIER (1)
FUSE 20A
MAGNETRON
TEMP. FUSE (1)
H.V. RECTIFIER (2)
1.
2.
3.
4.
R-23GT-F
R-24GT-F
DESCRIPTION AND FUNCTION OF COMPONENTS
Functions:
With the door shut, the contacts of the door sensing switch and
the secondary interlock switches (1), (2) are closed and the
contacts of the monitor switches (1), (2) are open.
1. When the door is opened, the contact of the door sensing
switch and secondary interlock switches (1), (2) are opened
first, then the contact of the monitor switches (1), (2) are
closed.
2. As the door goes to a closed position, the contacts of the
monitor switches (1), (2) are opened first, then the contacts
of the door sensing switch and the secondary interlock
switches (1), (2) close.
3. If the door is opened, and the contacts of the primary
interlock relay and secondary interlock switch of the same
circuit fail to open, the monitor fuse blows simultaneously
with closing of the monitor switch contacts of that circuit (1
or 2).
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH,
PRIMARY INTERLOCK RELAYS (1), (2), SECONDARY INTERLOCK SWITCHES (1), (2) AND
MONITOR SWITCHES (1), (2) FOR PROPER
OPERATION. (REFER TO CHAPTER "TEST
PROCEDURE").
DOOR OPEN MECHANISM
1. The door release lever is pulled.
2. The upper latch head is lifted up by the linked door release
lever.
3. The latch lever is lifted up by the door release lever.
4. The joint lever is lifted up by the latch lever.
5. The lower latch head is lifted up by the joint lever.
6. Now both latch heads are lifted up, so they can be released
from the latch hook.
7. Now the door can be opened.
Door release
lever
Latch head
Switch lever A
Monitor switch (2)
Monitor switch (1)
Latch hook
Switch lever B
Secondary interlock
switch (2)
Joint lever
Latch lever
Secondary interlock
switch (1)
NOTE: MONITOR FUSE AND SWITCH ARE REPLACED
AS AN ASSEMBLY.
Door sensing switch
Switch lever C
MAGNETRON TEMPERATURE FUSES (1), (2)
Latch head
The temperature fuses (1), (2) located on the top of the upper
and lower waveguide, are designed to prevent damage to the
magnetrons (1), (2). If an over heated condition develops in the
tube due to blower motor failure, obstructed air ducts, dirty or
blocked air intake, etc., the circuit to the magnetrons are
interrupted. Under normal operation, the temperature fuses
remains closed. However, when abnormally high temperatures
are generated within the magnetron, the temperature fuse will
open at 302˚F (150˚C) causing the microwave energy to stop.
The defective temperature fuse must be replaced with new
rated one.
Figure D-1. Door Open Mechanism
DOOR SENSING SWITCH
The door sensing switch is activated by the latch head of the
door and switch lever C. When the door is opened, the contacts
of the switch open and interrupt the circuit to the coils of the
primary interlock relays (1), (2). The contacts of the primary
relays (1), (2) then open and interrupt the circuit to the primary
winding of the power transformers. At this time, the contacts of
relay RY1 close and the blower motor, stirrer motors and oven
lamps are energized for 1 minute.
OVEN TEMPERATURE FUSE
SECONDARY INTERLOCK SWITCHES (1), (2)
The temperature fuse, located on the side of the exhaust duct
assembly, is designed to prevent damage to the oven by fire.
If the food load is overcooked, by either error in cook time or
defect in the control unit, the temperature fuse will open. Under
normal operation, the oven temperature fuse remains closed.
However, when abnormally high temperatures are generated
within the oven cavity, the oven temperature fuse will open at
248˚F (120˚C), causing the oven to shut down. The defective
temperature fuse must be replaced with new rated one.
The secondary interlock switches (1), (2) are activated by the
upper latch head of the door and switch lever B. When the door
is opened, the contacts of the switch open and interrupt the
circuit to the primary winding of the power transformers (1), (2).
MONITOR SWITCHES (1), (2)
The monitor switches (1), (2) are mounted in the upper position
of the latch hook. The monitor switches are activated by the
upper latch head of the door and switch lever A. When the door
is opened, the contacts of the monitor switches close. Monitor
switch (1) is intended to render the oven inoperative by means
of blowing the monitor fuse, when the contacts of the primary
interlock relay (1) and secondary interlock switch (1) fail to open
when the door is opened. Monitor switch (2) is intended to
render the oven inoperative by means of blowing the monitor
fuse, when the contacts of the primary interlock relay (2) and
secondary interlock switch (2) fail to open when the door is
opened.
OVEN THERMISTOR (1)
The thermistor is a negative temperature coefficient type. The
temperature in the exhaust duct is detected through the resistance of the thermistor.
If the temperature is high, the control panel will display “EE7”
and the oven will stop to avoid overheating and catching fire.
If the thermistor is open, the control panel will display "EE6" and
the oven will stop.
9
R-23GT-F
R-24GT-F
SELECT SWITCH AND ELECTRICAL COMPONENTS
CONDITION
OVEN THERMISTOR (2)
This thermistor detects temperature of the oven cavity bottom
plate. The thermistor is a negative temperature coefficient type.
The temperature is detected through the resistance of the
thermistor.
If the temperature is high, the control will display “EE17” and the
oven will stop.
SWITCH NO.
MAGNETRON THERMISTOR
The upper and lower stirrer motors drive stirrer antennas to stir
the microwave radiation from the upper and lower waveguides.
OVEN LAMPS
The oven cavity light illuminates the interior of the oven so that
food being cooked can be examined visually through the door
window without having to open the door. The oven lamp is on
during the cooking cycle and idle condition.
SELECT SWITCHES (1) - (3)
The select switch assembly is an array of three separate
switches which may be configured for either 208V or 230V
operation (see General Information section, voltage select).
These switches are connected to the windings of components
specified in the table below and make those components
compatible with the specified line voltage by changing their
internal windings. For 208V operation contacts (Normal Open)
of the all switches are open.
Select switch (3)
Select switch (1)
Screw
COM.
N.O
(3)
Power transformer (2) (Rear side)
The noise filter prevents the radio frequency interference that
might flow back in the power circuit.
STIRRER MOTORS
N.C.
Power transformer (1) (Front side)
NOISE FILTER
The blower motor drives a blade which draws external cool air
into the oven. This cool air is directed through the air vanes
surrounding the magnetrons and cools the magnetrons. This
air is channelled through the oven cavity to remove steam and
vapours given off from the heating foods. It is then exhausted
through the exhausting air vents at the oven cavity.
Select
switch (2)
Touch control unit
(2)
Oven in the 230V setting: contacts between common and
normally closed are closed.
BLOWER MOTOR
Oven
cavity
(1)
Oven in the 208V setting: contacts between common and
normally open are closed.
The thermistor is a negative temperature coefficient type. The
air temperature around the upper magnetron is detected through
the resistance of the thermistor.
If the temperature is high, the control panel will display "EE17"
and the oven will stop to protect the lower magnetron against
overheat.
If the oven thermistor (2) and the magnetron thermistor are
open at the same time, the control panel will display "EE16" and
the oven will stop.
Rear
cabinet
side
ELECTRICAL PARTS
Switch
spacer
Select switch angle
10
R-23GT-F
R-24GT-F
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 switches (1), (2), primary
interlock relays RY2, RY3, door sensing switch and secondary interlock switches (1), (2), before replacing the
monitor fuse. If monitor fuse is replaced, the monitor switch (1) and/or (2) must also be replaced. Use part FFSBA033WRKZ 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 two high voltage capacitors.
4. Disconnect the leads to the primaries of the two power transformers.
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 two high voltage capacitors.
4. Reconnect the all leads removed from components during testing.
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.
11
12
ERROR
MODE
COOKING
CONDITION
OFF
CONDITION
CONDITION
PRIMARY INTERLOCK SYSTEM (1), (2)
(1)
(2)
F G
MONITOR SWITCH (1), (2)
(1)
(2)
I
MONITOR FUSE
HIGH VOLTAGE CAPACITOR (1), (2)
H.V. RECTIFIER (1), (2)
POWER TRANSFORMER (1), (2)
MAGNETRON (1), (2)
Home fuse blows when power cord is plugged into wall
receptacle
Monitor fuse blows when power cord is plugged into wall
receptacle.
" . " does not appear in display when power cord is first
plugged into wall receptacle.
Blower motor does not operate. (Oven lamp(s) and stirrer
motors go on for 1 minute after door is opened.)
Blower motor, oven lamp(s) and stirrer motors do not go on for
1 minute after door is opened.
Blower motor and stirrer motors go on but oven lamp(s) do not
light for 1 minute after door is opened.
Blower motor, oven lamp(s) and stirrer motors keep going on
after more than 1 minute when door is opened and closed.
Blower motor, oven lamp(s) and stirrer motors do not go on in
cook cycle.
Oven goes into a cook cycle but shuts down before and off
cooking cycle.
Oven does not go into cook cycle when START pad is touched.
Low or no power is produced during cooking condition. (The
food is heated incompletely or not heated at all.)
Extremely uneven heating is produced in oven load (food).
Variable cooking does not operates properly, except HIGH
power functions.
(1) (1) (1) (1)
"EE1" Magnetron (1) failure.
"EE2" Magnetron (2) failure.
(2) (2) (2) (2)
"EE3" Magnetron (1) and (2) failure.
"EE4" Voltage is too high.
"EE5" Voltage is too low.
"EE6" Oven thermistor (1) failure.
"EE7" Exhaust air temperature is too high.
"EE8" Relay melt short.
"EE9" Maximum time is exceeded.
"EE16" Oven thermistor (2) and Magnetron thermistor are
open.
"EE17" Magnetron temperature is too high.
PROBLEM
POSSIBLE CAUSE AND
DEFECTIVE PARTS
J
MAGNETRON TEMP. FUSE (1), (2)
A B C D E F
DOOR SENSING SWITCH
SECONDARY INTERLOCK SWITCH (1), (2)
CK = Check / RST = Reset / RE = Replace
NO LOAD OPERATION
EXCEED MAX. HEATING TIME
LOW POWER SUPPLY VOLTAGE
NO POWER AT OUTLET
SHORT IN POWER SUPPLY CORD
LOOSE WIRING
AIR FLOW BLOCKED
SITTER MOTORS
OPEN FOIL PATERN ON P.W.B.
RELAY (RY-3)
RELAY (RY-2)
RELAY (RY-1)
KEY UNIT
TOUCH CONTROL PANEL
MAGNETRON THERMISTOR
NOISE FILTER
OVEN THERMISTOR (2)
OVEN THERMISTOR (1)
SELECT SWITCH (3)
SELECT SWITCH (2)
SELECT SWITCH (1)
BLOWER MOTOR
OVEN LAMP OR SOCKET
OVEN TEMPERATURE FUSE
J CK CK H H H K K K L M N O O O P CK CK CK CK CK RST RST CK RST
HIGH POWER SUPPLY VOLTAGE
TEST PROCEDURE
R-23GT-F
R-24GT-F
R-23GT-F
R-24GT-F
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 two high voltage capacitors.
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 100% POWER 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. Refer to the chart below for the normal
temperature rise of each model. 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 208/230
volts and the oven cavity is clean.
B
Model
R-23GT
RF output
1600W
Normal temperature rise
46.6 - 86.6˚F (25.9 - 48.1˚C)
R-24GT
1800W
50.4 - 93.6˚F (28.0 - 52.0˚C)
POWER TRANSFORMER TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
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 65 ohms
(R-23GT-F: RTRN-A454WRE0) and approximately 60 ohms (R-24GT-F: RTRN-A455WRE0); the resistance
of the filament coil should be less than 1 ohm.
5. Reconnect all leads removed from components during testing.
13
R-23GT-F
R-24GT-F
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.
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C
HIGH VOLTAGE RECTIFIER (1) AND/ OR (2) 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 two high voltage capacitors.
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.
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.
NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
D
HIGH VOLTAGE CAPACITOR (1) AND/ OR (2) TEST
1.
2.
3.
4.
5.
6.
7.
8.
E
SECONDARY INTERLOCK SWITCH (1) AND/ OR (2) TEST
1.
2.
3.
4.
5.
6.
7.
8.
F
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and
check for a 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.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
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.
PRIMARY 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 two high voltage capacitors.
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.
14
R-23GT-F
R-24GT-F
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
5.
6.
7.
8.
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.
NOTE:If the door sensing switch contacts fail in the open position and the door is closed, the blower
motor, stirrer motors and oven light will be activated by RY1.
PRIMARY INTERLOCK RELAY (RY2, RY3)
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
4. Disconnect two (2) wire leads from the male tab terminals of the Primary Interlock Relay RY2 and/or RY3.
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.
G
MONITOR SWITCH (1) AND/ OR (2) TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
4. Before performing this test, make sure that the secondary interlock switches (1), (2) and the primary
interlock relays RY2, RY3 are operating properly, according to the above Switch Test Procedure.
Disconnect the wire lead from the monitor switches (1), (2) (COM) terminals. Check the monitor switches
(1), (2) operation by using the ohmmeter as follows. When the door is open, the meter should indicate a
closed circuit. When the monitor switch actuator is pushed by a screw driver through the upper 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 switches, reconnect the wire lead to the monitor switch (COM)
terminals and check the continuity of
MONITOR SWITCH (2)
the monitor circuit.
5. Reconnect all leads removed from
MONITOR SWITCH (1)
components during testing.
6. Reinstall the outer case (cabinet).
SCREW DRIVER
7. Reconnect the power supply cord after
the outer case is installed.
8. Run the oven and check all functions.
OHMMETER
LATCH HOOK
H
VOLTAGE SELECT SWITCHES TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
Isolate switch and check the contacts by using an ohmmeter with following table. If improper operation is
indicated, make the necessary switch adjustment or replacement.
Table: Switch Connection
Plunger operation
Between COM. and NO.
Between COM. and NC.
COM.: Common terminal
Plunger released
Plunger operation
Open circuit
Close circuit
NO.:
Normal Open terminal
Close circuit
Open circuit
NC.:
Normal Close terminal
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.
15
Select switch (3)
Select switch (1)
Oven
cavity
Rear
cabinet
side
Screw
COM.
Select
switch (2)
N.C.
N.O
Switch
spacer
Select switch angle
R-23GT-F
R-24GT-F
TEST PROCEDURES
PROCEDURE
LETTER
I
COMPONENT TEST
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 two high voltage capacitors.
If the monitor fuse is blown when the door is opened, check the primary interlock relays RY2, RY3,
secondary interlock switches (1), (2) and monitor switches (1), (2) according to the "TEST PROCEDURE"
for those switches before replacing the blown monitor fuse.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE PRIMARY INTERLOCK
RELAYS, SECONDARY INTERLOCK SWITCHES, DOOR SENSING SWITCH AND MONITOR
SWITCHES 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-BA033WRKZ, 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. 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.
J
TEMPERATURE FUSE TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
A continuity check across the temperature fuse terminals should indicate a closed circuit unless the
temperature of the temperature fuse reaches specfied temperature as shown below.
Open
temperature
Close
temperature
Magnetron temperature fuse (1)
150˚C
Magnetron temperature fuse (2)
Oven temperature
fuse
120˚C
Non resetable
type
Non resetable
type
Display or
Condition
Check point
EE1
Magnetron (1) Failure:
Test magnetron (1) and Blower fan motor.
EE3
Magnetron (1), (2) Failure: Test magnetron (1), (2).
Check blower fan motor and ventilation opening.
EE2
Magnetron (2) Failure:
Test magnetron (2) and Blower fan motor.
Oven shut Food has been burned in oven.
off
Temperature of oven inside is very high.
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.
CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,
REPLACE TEMPERATURE FUSE.
K
THERMISTOR TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
Follow the procedures below for each thermistor.
4-1. MAGNETRON THERMISTOR TEST
Disconnect connector-H from the CPU unit. And disconnect the connector of the magnetron thermistor from
the switch harness. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads
to the leads of the thermistor.
16
R-23GT-F
R-24GT-F
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Room Temp.
59˚F (15˚C)
68˚F (20˚C)
77˚F (25˚C)
Resistance
Approx. 373 kΩ
Approx. 292 kΩ
Approx. 231 kΩ
If the meter does not indicate above resistance, replace the thermistor.
4-2. OVEN THERMISTOR (1) TEST
Disconnect connector-B from the CPU unit. Measure the resistance of the thermistor with an ohmmeter.
Connect the ohmmeter leads to the leads of the thermistor.
Room Temp.
59˚F (15˚C)
68˚F (20˚C)
77˚F (25˚C)
Resistance
Approx. 373 kΩ
Approx. 292 kΩ
Approx. 231 kΩ
If the meter does not indicate above resistance, replace the thermistor.
4-3. OVEN THERMISTOR (2) TEST
Disconnect connector-H from the CPU unit. And disconnect the connector of the magnetron thermistor from
the switch harness. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads
to the leads of the thermistor.
Room Temp.
59˚F (15˚C)
68˚F (20˚C)
77˚F (25˚C)
Resistance
Approx. 16 kΩ
Approx. 13 kΩ
Approx. 11 kΩ
If the meter does not indicate above resistance, replace the thermistor.
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.
L
NOISE FILTER TEST
NOISE FILTER
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 lead wires from the terminal the noise filter. Using
an ohmmeter, check between the terminals as described in the
following table. If incorrect reading are obtained, replace the noise
filter.
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.
N
FUSE
20A
LINE CROSS CAPACITOR
1.0µF / AC 250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0033µF / AC 125V
WHITE
BLACK
MEASURING POINT
M
L
DISCHARGE RESISTOR
470 K 1/2W
LINE BYPASS
CAPACITOR
0.0033µF / AC 125V
RED
INDICATION OF OHMMETER
Between N and L
Approx. 470 KΩ
Between terminal N and WHITE/ BLACK
Short circuit.
Between terminal L and RED
Short circuit.
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 troubleshooting by unit replacement is described according to the symptoms
indicated.
17
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Before testing,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
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) Reconnect all leads removed from components during testing.
3) Re-install the outer case (cabinet).
4) Reconnect the power supply cord after the outer case is installed.
5) Run the oven and check all functions.
The following symptoms indicate a defective key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the Key unit is defective.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
4) Replace the Key unit.
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.
2. Control Unit
The following symptoms indicate a defective control unit. Before replacing the control unit, perform
the Key unit test (Procedure N) to determine if control unit is faulty.
Re-connect the power supply cord. And check for followings.
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 display
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) Cooking is not possible.
When testing is completed,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
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.
18
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TEST PROCEDURES
PROCEDURE
LETTER
N
COMPONENT TEST
KEY UNIT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is
making good contact, verify that the door sensing switch (stop 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
(stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control unit and make
sure the door sensing switch is closed (either close the door or short the door sensing switch connecter).
Use the Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins
that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by
clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is
faulty and must be replaced. If a specific pad does not respond, the above method may be used (after
clearing the control unit) to determine if the control unit or key pad is at fault.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
G1
G2
17
G9
18
G 10
19
G 11
20
G 12
O
G4
G3
G5
G6
G7
G8
7
SELECTA DOUBLE
POWER QUANTITY
START
SET
8
SELECTA EXPRESS
DEFROST
TIME
STOP /
CLEAR
CHECK
9
0
15
16
5
6
13
14
3
4
11
12
1
SIGNAL
2
RELAY TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
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. Remove the outer case and check voltage between Pins No. 5 (or No. 3 at 230V) and No. 7 of the 7 pin
connector (A) on the control unit with an A.C. voltmeter.
The meter should indicate rated voltage, if not check oven circuit.
RY1, RY2 and RY3 Relay Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ................... Defective relay.
DC. voltage not indicated ............. Check diode which is connected to the relay coil. If diode is
good, control unit is defective.
RELAY SYMBOL
OPERATIONAL VOLTAGE
CONNECTED COMPONENTS
RY1
Approx. 12.0V D.C.
Oven lamp / Blower motor / Stirrer motors
RY2
RY3
Approx. 12.0V D.C.
Approx. 12.0V D.C.
Power transformer 1
Power transformer 2
8. Disconnect the power supply cord, and then remove outer case.
9. Open the door and block it open.
10. Discharge two high voltage capacitors.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case (cabinet).
19
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
13. Reconnect the power supply cord after the outer case is installed.
14. Run the oven and check all function.
P
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, and then remove outer case.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
4) Follow the troubleshooting guide given below for repair.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
2
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
TB1
CT1
c
d
b
P
(VRS2)
POWER
12
POWER
6)
7)
8)
9)
VRS1
(J1)
a
T1
17
7
5) 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 865Ω ± 10% between 208V
terminals and 970Ω ± 10% between 230V
terminals). If any abnormal condition is
detected, replace the defective parts.
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.
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.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
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
8)
9)
10)
11)
12)
13)
14)
OCCURRENCE
CAUSE OR CORRECTION
1
The rated AC voltage is not present to power
terminal of CPU connector CN-A.
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.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge two high voltage capacitors.
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.
20
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TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units as
shown in the touch control panel circuit.
15) Oven Cavity Temperature Detecting Circuit
This is a circuit for transmitting output change of thermistor
(Oven thermistor (2)) to IC1.
(1) Control Unit
(2) Key Unit
16) High Voltage Monitoring Circuit.
This circuit detects problems in the magnetron / high
voltage circuit by sensing a variation in the current flowing
through the primary winding of the high voltage transformer.
During heating, the primary current of the high voltage
transformers also flows through the primary winding of the
current transformer CT1. This causes a current to be
induced in the secondary winding of CT1 and results in an
AC voltage which is determined by R100.
This AC voltage is then half wave rectified by D100 and
smoothed (filtered) by C100.
This AC voltage is the input to the AN3 port of IC1, which
determines if there is a magnetron / high voltage problem.
2) ACL Circuit
This is an Auto-clear Circuit, i.e., a reset circuit, which
enables IC1 to be activated from initial state.
D100
CT1
3) Power Synchronizing Signal Generating Circuit
This is a circuit for generating power synchronizing signal
by virtue of the secondary side output of transformer T1.
This signal is used as a basic frequency for time processing.
R102
TB1
R101
47µ/10v
C100
820F
R100
4) Clock Circuit
This is a circuit for controlling clock frequency required for
operating IC1.
To AN3 of IC1
4.7k
0.01µ/16v
1) Power Supply Circuit
This circuit changes output voltage at the secondary side
of the low voltage (T1) transformer to voltages required at
each part by full wave rectifying circuit, constant voltage
circuit, etc..
C101
1. Control Unit
Signal of key touch and oven function control are all
processed by one microcomputer.
100k
The principal functions of these units and the signals communicated among them are explained below.
TB2
5) IC1 (Main Processor)
This is a one-chip microcomputer, responsible for controlling the entire control unit.
Figure T-1. High Voltage Monitoring Circuit
D1
12) Door Sensing Switch Circuit
This is a circuit for driving IC1 to detect door opening/
closing.
AC208V
60Hz
13) Exhaust Air Temperature Detecting Circuit
This is a circuit for transmitting output change of thermistor
(Oven thermistor (1)) to IC1.
(J1)
VRS1
A5
VRS2
AC230V
60Hz
11) Relay Driving Circuit
This is a circuit for driving output relay by IC1 output.
10EDB10 x 4
D2
D3
D4
+
-
470
A3
ZD1
T1
10) Sound-body Driving Circuit
This is a circuit for driving sound body by IC1 output.
R1
9) Key Input Circuit
This is a circuit for transmitting key input information to IC1.
R2
8) Display Circuit
This is a circuit for driving light emitting diode by IC1 output.
C1 2200µ/25v
7) IC3
This is a IC for driving light emitting diode.
470 HZ12B1
17) Supply Voltage Detecting Circuit
This is a circuit for detecting troubles of input voltage at
microwave oven. The function of this circuit is to divide the
variation of voltage across C1 to supply voltage variation
by ZD1, R1 and R2 and to put the result to AN6 port of IC1
for detection.
6) IC2 (Memory Processor)
This is a memory IC, responsible for memory function.
IC1(AN6)
A7
14) Magnetron Temperature Circuit
(Detect no load or fan lock)
This is a circuit for transmitting output change of thermistor
(Magnetron thermistor) to IC1.
FIgure T-2. Supply Voltage Detecting Circuit
21
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VOLTAGE REGULATION FOR "ERROR" INDICATION
Voltage
regulation
Input to
208V
Input to
230V
*Normal
+6% excel.
208.0--220.48
230.0--243.8
*Normal
-9% excel.
189.28--208.0
209.3--230.0
*Error.or
indication
range
+6% to
+13% excel.
-9% to
-13% excel.
220.48
235.04
189.28
180.96
243.8
259.9
209.3
200.1
Not
cookable
over +13%
under -13%
over 235.04
under 180.96
over 259.9
under 200.1
* Cookable Range
2. Key Unit
The key unit is composed of a matrix circuit in which when
a key it touched, one of signals P30--P34 generated by the
LSI, is passed through the key and returned to the LSI as
one of signals P24--P27.
This model has 20 Memory pads.
When the oven is shipped, Memory pad 1 to 10 are set as
follows: fig.1.
Memory No.
1
2
3
4
5
6
7
8
9
0
Cook Time
Output Power
10 sec.
20 sec.
30 sec.
45 sec.
1 min.
1 min. 15 sec.
1 min. 30 sec.
2 min.
2 min. 30 sec.
3 min.
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
(fig. 1)
This model has a double quantity pad. When the oven is
shipped, Magnification "1.8" is preset in the double quantity pad.
This model has an express defrost pad. When the oven is
shipped, express defrost is set as follows: fig.2.
FORMULA
POWER
1 STAGE
2 STAGE
3 STAGE
P = 0.2T + 20
P = 0.13T + 30
P = 0.67T - 50
40 %
30 %
20 %
T : Total cooling time
(fig. 2)
When 1/2 total cooking time is passed, the signal will
sound and "CHECK" indicator will flash.
22
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DESCRIPTION OF LSI
LSI(IZA633DR)
The I/O signal of the LSI(IZA633DR) is detailed in the following table.
Pin No.
1
Signal
VCC
I/O
IN
Description
Power source voltage: +5V.
VC voltage of power source circuit input.
VEE/AVSS
IN
Connected to GND
4
VREF
IN
Connected to VC. (+5V)
5
AN7
IN
Temperature measurement input: INTAKE THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this
input is converted into temperature by the A/D converter built into the LSI.
6
AN6
IN
Used (judge for input voltage).
AN5-AN4
IN
Terminal to change functions according to the model.
Signal in accordance with the model in operation is applied to set up its function.
9
AN3
IN
A/D input for troubleshooting Magnetron 1. and/or Magnetron 2.
10
AN2
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this
input is converted into temperature by the A/D converter built into the LSI.
11
AN1
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "L" level signal (0V).
Door opened; "H" level signal (+5V).
12
AN0
IN
Temperature measurement input: FAN LOCK THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this
input is converted into temperature by the A/D converter built into the LSI.
P55-P54
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power level operation, "H" level during cooking;
"L" level otherwise. In other power level operation (90,80,70,60,50,40,30,20,10 or 0%), "H"
and "L" level is repeated according to power level.
2/3
7-8
13-14
ON
Power level
100%
90%
80%
70%
60%
50%
15
16-18
19
P53
OUT
P52-P50
IN
P47
OUT
ON
32sec.
30sec.
26sec.
24sec.
22sec.
18sec.
OFF Power level
0sec.
40%
2sec.
30%
6sec.
20%
8sec.
10%
10sec.
0%
14sec.
ON
16sec.
12sec.
8sec.
6sec.
0sec.
OFF
16sec.
20sec.
24sec.
26sec.
32sec.
+5V
OFF
GND
32 sec.
Oven thermistor circuit power supply control signal.
Output the "H" signal to supply power to oven thermistor circuit about 1.7msec. after plugging
in.
Terminal not used.
Signal to sound buzzer.
This signal is to control the 2.5kHz continuous
signal through IC3.
A: key touch sound.
B: Guydance sound.
C: Completion sound.
0.1 sec
+5V
A
T
GND
1 sec
1 sec
+5V
B
200µsec.
200µsec.
GND
2 sec
+5V
C
GND
20
P46
OUT
Oven lamp, Blower motor and Stirrer motor driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay (RY1). The
During cooking
Square waveform voltage is delivered to the RY1
H
driving circuit and relays(RY2,RY3,COOK RELAY)
control circuit.
L
16.7 msec
23
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Pin No.
21
Signal
I/O
P45
OUT
Description
Digit selection signal.
The relation between digit signal and digit are as
follows:
Digit signal Digit
P42 ..................... 1st.
P43 .................... 2nd.
P44 ..................... 3rd.
P45 ..................... 4th.
25
P44-P42
OUT
INT1
IN
L
+5V
P42
GND
P43
P44
Normally, one pulse is output in every ß period,
and input to the grid of the light-emitting diode.
22-24
H
ß(60Hz)
P45
Digit selection signal.
Signal similar to P45.
Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
H : +5V
L : GND
16.7 msec
26
INT0
IN
Connected to GND through resistor.
27
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set
to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H"
level.
28
P71
OUT
29
P70
IN/OUT
30
XIN
IN
31
XOUT
OUT
32
VSS
IN
Connected to GND.
33
P27
IN
Signal coming from touch key.
When either one of G-12 line keys on key matrix is touched, a corresponding signal out of
P30, P31, P32, P33, P34 will be input into P27. When no key is touched, the signal is held
at "L" level.
34
P26
IN
Signal similar to P27.
When either one of G-11 line keys on key matrix is touched, a corresponding signal will be
input into P26.
35
P25
IN
Signal similar to P27.
When either one of G-10 line keys on key matrix is touched, a corresponding signal will be
input into P25.
36
P24
IN
Signal similar to P27.
When either one of G-9 line keys on key matrix is touched, a corresponding signal will be
input into P24.
37-38
P23-P22
OUT
Terminal not used.
39-40
P21-P20
OUT
Segment data signals.
The relation between signals and indicators are as follows:
Signal
Segment
Signal
Segment
Memory (EEPROM) clock output.
Memory (EEPROM) data input/output.
Internal clock oscillation frequency setting input.
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.
P21,P20
P17.P16
P15,P14
P13,P12
P11,P10
P07,P06
.......... 1
.......... 2
.......... 3
.......... 4
.......... 5
.......... 6
P05,P04 ............. 7
P03,P02 ............. 8
P01,P00 ............. 9
ß(60Hz)
+5V
GND
24
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Pin No.
Signal
I/O
Description
41-48
P17-P10
OUT
Segment data signal.
Signal similar to P21.
49-56
P07-P00
OUT
Segment data signal.
Signal similar to P21.
57-59
P37-P35
OUT
Terminal not used.
60
P34
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G4 line keys on key matrix is touched.
61
P33
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G5 line keys on key matrix is touched.
62
P32
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G6 line keys on key matrix is touched.
63
P31
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G7 line keys on key matrix is touched.
64
P30
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G8 line keys on key matrix is touched.
2-2 Memory IC (IC2)
X24C02P is a 2K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with 256
registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/output signal for IC2 are
as shown in the following diagram.
FUNCTIONAL DIAGRAM
(3) Vcc
(4) Vss
H.V. GENERATION
TIMING
& CONTROL
START CYCLE
TOP VIEW
(5) SDA
A0
1
A1
2
8
START
STOP
LOGIC
VCC
CONTROL
LOGIC
7
TEST
SLAVE ADDRESS
REGISTER
COMPARATOR
(6) SCL
A2
VSS
3
4
6
SCL
5
SDA
64
XDEC
E 2PROM
256 x 8
INC
LOAD
WORD
ADDRESS
COUNTER
1
5
3
R/W
CK
PIN
64
YDEC
8
DATA REGISTER
Dout
Dout
ACK
Figure T-3 Relation between Pin Nos, and Signals
Pin No.
1-3
4
5
6
7
8
Signal
A0-A2
VSS
SDA
SCL
TEST
VCC
I/O
IN
IN
IN/OUT
IN
IN
IN
Description
Connected to +5V.
Connected to GND.
Serial data input/output : input/outputs data to IC1.
Clock signal input : input/outputs sireal data at every one pulse.
Connected to GND.
Connected to +5V.
25
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SERVICING
1. Precautions for Handling Electronic Components
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).
This unit uses CMOS LSI in the integral part of the circuits.
When handling these parts, the following precautions should
be strictly followed. CMOS LSI have extremely high
impedance at its input and output terminals. For this reason,
it is easily influenced by the surrounding high voltage power
source, static electricity charge in clothes, etc. and
sometimes it is not fully protected by the built-in protection
circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them
in aluminium foil. Also wrap all PW boards containing
them in aluminium foil.
2) When soldering, ground the technician as shown in
the figure and use grounded soldering iron and work
table.
approx. 1M ohm
2. Shapes of Electronic Components
1
2
3
IC
KIA7805PI
E
CB
Transistor
DTA123ES
DTB143ES
DTD143ES
KRA101M
KRC101M
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.
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
(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.
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.
Therefore, before checking the performance of the touch
control panel,
1) Disconnect the power supply cord, and then remove
outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power
transformer.
5) Ensure that these leads remain isolated from other
components and oven chassis by using insulation tape.
6) After that procedure, re-connect the power supply cord.
After checking the performance of the touch control panel,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Re-connect the leads to the primary of the power
transformer.
4) Re-install the outer case (cabinet).
26
R-23GT-F
R-24GT-F
3) Practice for inputting total using times (Ex. 310000 times).
PROCEDURE FOR CHECKING/CLEARING
SERVICE COUNTS OF MICROWAVE OVEN
... Flashing /
PAD
(Door close)
The following procedure enables the servicer to obtain the total
using times (cook cycles) since the microwave oven is purchased and the total operation time (hours) since the microwave oven is purchased. The maximum capacity of the total
using is 999,999 times, and the maximum capacity of total
operation time is 999,999 hours.
CHECK
CHECK
SIGNAL
SIGNAL
DOUBLE
QUANTITY
1) Practice for checking total using times (Ex. 345678 times).
... Flashing /
... 0.1sec BUZZER
DISPLAY
.
.
.
82 68
(user total count)
... 0.1sec BUZZER
INDICATOR
TONE
CHECK No.
CHECK
34 56
(service total count upper figure)
3456XX
PAD
DISPLAY
(Door close)
.
INDICATOR TONE
2
.
CHECK
(after 1 sec.)
.
CHECK
CHECK No.
82 68
78
XXXX78
CHECK
1
1
(after 1 sec.)
SET
3,1,0,0
SET
SIGNAL
SIGNAL
QUANTITY
34 56
34 56
0
31 00
31 00
2
1 (No 1)
1
(after 1 sec.)
34 56
2 (No 2)
x4
78
0
0
0
No.
CHECK
78
.
4) Practice for inputting total operation time (Ex. 1234 hours).
(service total count lower figure)
CHECK
... Flashing /
.
PAD
(Door close)
2) Practice for checking total operation time (Ex. 4567 hours).
... Flashing /
PAD
DISPLAY
(Door close)
.
... 0.1sec BUZZER
CHECK
CHECK
INDICATOR TONE
SIGNAL
SIGNAL
DOUBLE
QUANTITY
.
CHECK
.
CHECK
82 68
CHECK No.
CHECK
DISPLAY
.
.
.
82 68
(user total count)
SIGNAL
34 56
(service total count upper figure)
3456XX
9
(after 1 sec.)
34 56
(after 1 sec.)
SET
1,2
SET
45
0
12
12
0
10
67
0
34
34
(Total operation time 1234 hours set)
No.
CHECK
(after 1 sec.)
9
(after 1 sec.)
SET
3,4
SET
45
0
CHECK No.
CHECK
No.
x2
No.
No.
(Total operation time upper figure)
0 (No 0)
INDICATOR TONE
(service total count upper figure)
9
SIGNAL
9 (No 9)
... 0.1sec BUZZER
3456XX
(user total count)
DOUBLE
No.
(service total count 310000 set)
2
(after 1 sec.)
2
(after 1 sec.)
SET
0
SET
No.
(service total count upper figure)
67
(Total operation time lower figure)
CHECK
No.
(service total count upper figure)
3456XX
QUANTITY
No.
(service total count lower figure)
(user total count)
DOUBLE
2
.
27
.
x2
R-23GT-F
R-24GT-F
5) Practice for cancelling total using times and total operation
time (user and service) and all other counter.
... Flashing /
PAD
(Door close)
SET
SET
(within 2.0sec.)
DOUBLE QUANTITY
CHECK
SINGLE
SET
KEY
INDICATOR
1
1
After 10% of total cooking time is passed
:
:
:
9
9
After 90% of total cooking time is passed
START
A
There is no pause
TONE
2) To check the constants of Express defrost.
" ": Flicker /
DOUBLE
PAD
CHECK
EXPRESS DEFROST
(
" ": Flicker /
(Door close)
#1 START
2,0
DEF
.
P - 20
( PL )
(within 2 sec.)
EXPRESS DEF
"No." CHECK
5
( pause time )
.
"NO"
TONE
P - 30
( PL )
TONE
.
SET
INDICATOR
0.13
(A)
30
( +-B )
: 0.1 sec BUZZER
DISPLAY
DISPLAY
.
.
0.20
(A)
20
( +-B )
: 0.1 sec BUZZER
P - 40
( PL )
)
SET
End of each stage
No.
OTHER SETTING AND CHECKING PROCEDURE
1. EXPRESS DEFROST
T = STG1 + STG 2 + STG3
STG = A x T + B
1) To set the constants of Express defrost.
Ex. 0.20T + 20, 40% at 1st stage
0.13T + 30, 30% at 2nd stage
0.67T - 50, 20% at 3rd stage
PAD ORDER
PAUSE
0
... 0.1sec BUZZER
DISPLAY
.
.
.
.
.
.
.
.
.
DISPLAY
0
.
0.00
DEF.
0.20 DEF
x2
( repeat )
.
CHECK
(A)
#2 SELECTATIME
2
3) To set user counts
Practice for inputting total number of using times (Ex.
3100 times), and using times of Memory 1 (Ex. 100
times).
0 DEF
20 DEF
(+ - B)
DEF
#4 SELECTAPOWER
P-
" ": Flicker /
DEF
4
PAD
(Door close)
P - 40
SELECTATIME
1,3
0.00 DEF
0.13 DEF
CHECK
CHECK
x2
(A)
SELECTATIME
3
: 0.1 sec BUZZER
INDICATOR
TONE
CHECK No.
CHECK
DOUBLE QUANTITY
0 DEF
SIGNAL
SET
3,1,0,0
SET
30 DEF
(+ - B)
DEF
#4 SELECTAPOWER
DISPLAY
.
.
.
82 68
(user total count)
0
31 00
31 00
x4
(user total count 3100 set)
P-
#A
1
1
No.
DEF
3
(after 1 sec.)
P - 30
SELECTATIME
0 DEF
#3
5 DEF
5
SET
1,0,0
SET
DEF
1 32
(memory 1 count)
0
1 00
1 00
x3
(memory 1 count 100 set)
SELECTAPOWER
P-
2
P - 20
DEF
SET
. DEF
SET
.
CHECK
.
NOTE:
1 : To input using times of other memory, touch necessary Memory key
at above step #A.
2 : To input using times of manual cooking, touch SELECTATIME key
at above step #A.
3 : To input using times of Express Defrost, touch EXPRESS
DEFROST key at above step #A.
#1 : No key entry signal.
#2 : To set -B, touch the selectapower key twice.
#3 : Ex. defrost is paused after 50% of cooking time has lapsed when 5
key is entered, otherwise it is paused at the end of each stage.
28
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MEMORY READJUSTMENT PROCEDURE
1. To set the standard voltage
When the IC2 is changed in the control unit, the standard voltage must be set again for power supply check.
The power supply must be set 230V within ± 1V, and 230V connector in control unit installed.
PAD ORDER
(230V power)
(Door close)
(Plug in)
SIGNAL
DOUBLE
SET
DISPLAY
TONE
(BLANK)
.
.
.
.
CHECK
0633
(plug off)
(BLANK)
All
indicators
ON
NOTE :
1. This procedure must be performed within 1 minute.
2. When IC2 malfunctions the unit does not function normally (correct cooking data is not output, data is not stored
correctly in memory, etc.).
3. Initialization of memory after repairing the touch control panel.
After repairing the touch control panel, reset all counters to 0 (including service counter). Make sure that the constant which is stated
on page 22 (fig.2) has been memorized. If it mismatches, input the constant according to "EXPRESS DEFROST" on page 28.
A CHECK PROCEDURE FOR ERROR CODE INDICATION EE1, EE2
When the error code EE1 or EE2 is displayed, carry out following procedures and find out the defective parts. When oscillation is
unstable due to defect of upper and/or lower magnetron or defective driving circuits, error code indications EE1 or EE2 do not
function properly.
[CHECK METHOD FOR ERROR CODE INDICATION]
Put water in a cup and place inside the oven inside, and operate each circuit separately.
And check working of each circuit by temperature rise of the water and judge which magnetron circuit is defect.
After judging, please replace or repair applicable part according to the troubleshooting guide in the service manual.
[CAUTION ABOUT HIGH VOLTAGE]
There is high voltage present inside, disconnect the power supply cord from the outlet before removing the outer case.
Reinstall the outer case when operate the unit.
[JUDGMENT PROCEDURE]
1]. PREPARATION FOR JUDGMENT
1. Disconnect the plug from the outlet.
2. Remove the air filter and unscrew two screws at the control panel lower holding the control panel.
3. Push up the control panel and pull it toward.
29
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R-24GT-F
2]. [JUDGMENT PROCEDURE FOR UPPER MAGNETRON AND ITS CIRCUIT]
Disconnect the power supply cord.
Disconnect lead wires to the interlock relay RY3 to avoid operation of lower magnetron circuit.
Reconnect power supply
Heating for one minute.
No
Temperature of the water increased?
*1
If EE1 is indicated, carry out Test procedures A-J and find out
the defective part. Upper magnetron, its driving circuit or any
parts on its circuit may be defective.
Yes
EE2 should be indicated.
Upper magnetron, its driving circuit and parts on the circuit are normal.
*1: CHECK OF TEMPERATURE RISE
Fill approx. 453 CC of water in a measuring cup and place it in the oven.
Operate the oven for one minute.
Substract cold water temperature from hot water temperature.
The result should be approx. 18 - 36F (10 - 20 deg. C).
3]. [JUDGMENT PROCEDURE FOR LOWER MAGNETRON AND ITS CIRCUIT]
Disconnect the power supply cord.
Disconnect lead wires to the interlock relay RY2 to avoid operation of lower magnetron circuit. Lead wires to the interlock
relay RY3 should be connected.
Reconnect power supply
Heating for one minute.
No
If EE2 is indicated, carry out Test procedures A-J and find
out the defective part. Lower magnetron, its driving circuit
or any parts on its circuit may be defective.
Temperature of the water increased?
*1
Yes
EE1 should be indicated.
Lower magnetron, its driving circuit and parts on the circuit are normal.
*1: CHECK OF TEMPERATURE RISE
Fill approx. 453 CC of water in a measuring cup and place it in the oven.
Operate the oven for one minute.
Substract cold water temperature from hot water temperature.
The result should be approx. 18 - 36F (10 - 20 deg.C).
30
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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 pull the door release
lever 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.).
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Carry out any remedial work that is necessary before operating the oven.
Do not operate the oven if any of the following conditions exist;
1. Door does not close firmly.
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 and block it open.
3) Discharge the two high voltage capacitors and wait for
60 seconds.
2. Don’t let the wire leads touch to the followiong parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage
capacitor, High voltage rectifier assembly and High
voltage wire.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer, and
Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange, Chassis
support and other metallic plate.
4) Movable parts (to prevent a fault)
Blower fan blade, Blower fan motor, Switches, Switch
levers, Antenna motor and Sirrer antennas.
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, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the
following removal procedures:
OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL
To remove the components, procedure as follows.
1. Disconnect the power supply cord.
2. Remove the screws from the rear and along side the edge
of the outer case.
3. Slide the case back about 1 inch (3 cm) to free it from the
oven cavity.
4. Lift entire case from the unit.
5. DISCHARGE TWO HIGH VOLTAGE CAPACITORS
BEFORE TOUCHING ANY OVEN COMPONENTS OR
WIRING.
6. Now, outer case is free.
cavity and blower motor.
8. Remove the one (1) screws holding the switch mounting
angle to the rear cabinet and release the switch mounting
angle from the rear cabinet.
9. Disconnect the power supply cord from the supply harness.
10. Remove the one (1) screws holding the grounding wire of
power supply cord to the oven cavity.
11. Remove the rear cabinet with the power supply cord from
the oven cavity.
12. Loosen the tab of the cord bushing, and remove the power
supply cord with the cord bushing from the rear cabinet.
13. Remove the cord bushing from the power supply cord,
14. Now, the power supply cord and rear cabinet are free.
To remove rear cabinet and power supply cord:
7. Remove the screws holding the rear cabinet to the oven
31
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POWER TRANSFORMERS (1) AND/OR (2) REMOVAL
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Disconnect wire leads of power transformers (1) and/or (2)
from magnetrons (1) and/or (2).
5. Remove the wire leads of power transformers from the wire
holder.
6. Pull out the wire leads of power transformers from the tube.
7. Disconnect wire leads of power transformers (1) and/or (2)
from high voltage capacitors (1) and/or (2).
8. Disconnect the high voltage wire lead(s) from power
transformers (1) and/or (2).
9. Disconnect the main wire harness from power transformers
(1) and/or (2).
10.Remove two (2) screws holding each power transformer (1)
and/or (2) to base plate.
11.Remove the power transformers (1) and/or (2) from base
plate.
12.Now, power transformers (1) and/or (2) are free.
MAGNETRONS (1) AND/OR (2) REMOVAL
Removal
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Remove the two (2) screws holding magnetron exhaust
duct to upper and lower waveguide.
5. Remove the magnetron exhaust duct from oven cavity.
6. Disconnect wire leads from magnetrons (1) and/or (2).
7. Disconnect magnetron thermistor from the connector of the
stop switch harness.
8. Remove the one (1) screw holding the thermistor angle to
the upper magnetron.
9. Remove the four (4) screws holding each magnetron (1)
and/or (2) to upper and/or lower waveguide. When removing
the screws, hold the magnetron to prevent it from falling.
10.Remove the magnetrons (1) and/or (2) from upper and/or
lower waveguide with care so magnetron antenna is not hit
by any metal object around antenna.
11.Pull out the thermistor angle from the upper magnetron (1).
12.Remove the thermo-contactor from the upper magnetron
(1).
13.Now, the magnetrons (1) and/or (2) are free.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY.
MAGNETRON THERMISTOR REPLACEMENT
Removal
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Remove the upper magnetron from the upper waveguide
flange, referring to "MAGNETRON (1) AND /OR (2)
REMOVAL".
5. Now, the upper magnetron with the magnetron thermistor
should be free.
6. Remove the thermistor angle from the upper magnetron by
pulling out.
7. Straighten the tab of the magnetron thermistor angle holding
the magnetron thermistor.
8. Remove the magnetron thermistor from the thermistor
angle.
9. Now, the magnetron thermistor is free.
NOTE:The magnetron thermistor should be between the
upper fin and the 2nd. fin.
6. Re-install the upper magnetron to the upper waveguide
flange with four (4) screws.
7. Re-install the thermistor angle to the upper waveguide
flange with one (1) screw.
8. Re-install the magnetron exhaust duct to the upper and
lower waveguide flanges with two (2) screws.
9. Route the thermistor harness under the magnetron
temperature fuse.
10.Connect the thermistor harness to the stop switch harness.
11.Connect the wire leads to the upper magnetron, referring to
the pictorial diagram.
12.Re-install the power supply cord, rear cabinet and outer
case cabinet to the oven by reversing the procedures of
"OUTER CASE, REAR CABINET AND POWER SUPPLY
CORD REMOVAL".
CAUTION: WHEN REPLACING MAGNETRON, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY.
Re-install
1. Apply the silicone grease (Shinetsu silicone grease G746 of
Shinetsu Chemical Co. Ltd.) to the thermo-contactor and
the magnetron thermistor.
2. Insert the thermo-contactor between the 1st. fin and the
2nd. fin.
3. Install the magnetron thermistor to the thermistor angle as
shown in Figure C-1.
4. Hold the magnetron thermistor to the thermistor angle by
bending the tab of the thermistor angle.
5. Insert the thermistor angle between the 2nd. fin and 3rd. fin
from the upper fin of the upper magnetron and push it until
the thermistor angle stops.
Upper magnetron
Upper fin
Thermo contactor
Thermistor
angle
Tab
Magnetron
thermistor
Apply grease here.
Figure C-1. Magnetron thermistor installation
32
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HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL
1. Disconnect the power supply cord and then remove outer
case and rear cabinet , referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Remove two (2) screws holding ground side terminals of
high voltage rectifier assembly to the capacitor holder and
oven cavity.
5. Disconnect all wire leads from the high voltage capacitor.
6. Disconnect wire leads of high voltage rectifier assembly
from the power transformers (1) and/or (2).
Now, high voltage assembly is free.
7. Remove the three (3) screws holding the blower motor to
the top of oven cavity, the chassis support and air duct.
8. Remove two (2) screws holding the capacitor holder to
oven cavity.
Now, the capacitors (1), (2) and the high voltage rectifier
assembly are free.
CAUTION:
1. DISCHARGE THE TWO HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN COMPONENTS OR
WIRING.
2. DO NOT REPLACE ONLY THE HIGH VOLTAGE
RECTIFIER. IF IT IS DEFECTIVE, REPLACE THE HIGH
VOLTAGE RECTIFIER ASSEMBLY.
3. WHEN REPLACING THE HIGH VOLTAGE RECTIFIER
ASSEMBLY AND THE HIGH VOLTAGE CAPACITOR,
THE GROUND SIDE TERMINAL OF THE HIGH VOLTAGE
RECTIFIER MUST BE SECURED FIRMLY WITH A
GROUNDING SCREW.
HOW TO RELEASE THE POSITIVE LOCK® CONNECTOR.
Procedure
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Pushing the lever of positive lock® connector, pull down the
connector from the terminal.
5. Now, the connector is free.
Terminal
Positive lock®
connector
1
Push
Lever
®
Note: If the positive lock has a insulation sleeve, first
remove it. If you do not, you can not push the lever
of positive lock®.
2
Pull down
®
CAUTION: THE POSITIVE LOCK TERMINAL CAN NOT BE
REMOVED BYJUST PULLING ON IT. THE LOCK
LEVER MUST BE RELEASED TO REMOVE THE
CONNECTOR FROM THE TERMINAL.
Figure C-2. How to release the positive lock connector.
BLOWER MOTOR REMOVAL
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Disconnect the main wire harness from the blower motor
and noise filter.
5. Remove the two (2) screws holding the blower motor angle
to the oven cavity.
6. Remove the one (1) screw holding the blower motor angle
to the chassis support.
7. Remove the blower motor from the oven cavity.
8. Remove the two (2) screws holding the noise filter angle to
the blower motor.
9. Now, the blower motor is free.
STIRRER MOTORS (UPPER AND LOWER) REMOVAL
UPPER
1. Disconnect the power supply cord and then remove outer
case, referring to "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Disconnect the wire leads from the stirrer motor (upper).
5. Remove the one (1) screw holding the stirrer motor (upper)
to the oven cavity.
6. Turn and lift up the stirrer motor (upper).
7. Now, the stirrer motor (upper) is free.
LOWER
1. Disconnect the power supply coed.
2. Remove the stirrer motor cover by snipping off the material
in four portions.
3. Where the portions have been snipped off bend the portions
flat. No sharp edge must be evident after removal of the
stirrer motor cover.
4. Disconnect the wire leads from the stirrer motor (lower).
5. Remove the one (1) screw holding the stirrer motor (Lower)
to the oven cavity.
6. Now, the stirrer motor (lower) is free.
7. After replacement use one (1) screw to fit the stirrer motor
cover. (This screw has been fitted to the base plate near the
stirrer motor cover beforehand.)
33
R-23GT-F
R-24GT-F
CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
upward.
12.Now, the control unit and control panel frame (with key) are
free.
The complete control panel should be removed for replacement of components. To remove the control panel, proceed as
follows:
1. Disconnect the power supply cord.
2. Remove the air intake filter assembly from the base plate.
3. Remove two (2) screws holding the control panel to the
base plate.
4. Pull down the control panel and remove it forward.
5. Disconnect connectors (A), (B), (D), (H), wiring from tab
terminal 1 and 2 and wiring from RY1 and RY2.
6. Now the control panel assembly is free.
CAUTION:
When installing the control unit into the control panel
frame:
1. Be careful not to damage any of the components on the
control unit.
2. When inserting key units ribbon cable through the
frame, ensure it is not pinched or bent. Ensure the
control unit is pushed upward to lock into the control
panel frame prior to screwing the control unit into the
frame.
3. Ensure there are not any wires near the varistors, if the
explode, they may damage the wires.
CAUTION FOR TOUCH CONTROL PANEL REMOVAL
1) Hold the lower end (Position A, Fig. 1) of the touch control panel
assembly firmly while sliding it down and toward you.
NOTE: 1. Before attaching a new key unit, remove
remaining adhesive on the control panel frame
surfaces completely with a soft cloth soaked in
alcohol.
2. When attaching the key unit to the control panel
frame, adjust the upper edge and right edge of
the key unit to the correct position of control
panel frame.
3. Stick the key unit firmly to the control panel frame
by rubbing with soft cloth to prevent scratching.
DO NOT FORCE THE CONTROL UNIT TO SLIDE DOWN
DURING REMOVAL. THIS MAY CAUSE DAMAGE TO THE
CONTROL UNIT BY HITTING THE TAB TERMINALS LOCATED AT THE FRONT OF THE OVEN CAVITY.
2) If the Touch Control Panel is hard to remove;
(1) Insert a flat head screw driver into space B . (Fig. 1)
(2) Rotate the screwdriver clockwise while holding position C
of the Touch Control Panel. (Fig. 2)
TO AVOID DAMAGE TO TOUCH CONTROL PANEL, COVER
THE TIP OF SCREWDRIVER WITH TAPE.
Fig. 2
Fig. 1
Replacement of individual component is as follows:
B
B
CONTROL UNIT AND CONTROL PANEL FRAME
(WITH KEY)
7. Remove two (2) screws holding the control panel mounting
angle to the panel frame.
8. Lift up the control panel mounting angle from the panel
frame.
9. Disconnect connector (G) from the control unit by pushing
the hooks of cable holder inwardly.
10. Remove five (5) screws holding the control unit to the panel
frame assembly.
11. Push down the right side two (2) hooks fixing the control unit
to the panel frame assembly, and lift up the control unit
A
TOUCH CONTROL PANEL
C
SCREW DRIVER
VOLTAGE SELECT SWITCH REMOVAL
1. Disconnect the power supply cord and then remove outer
case and rear cabinet, referring to "OUTER CASE, REAR
CABINET AND POWER SUPPLY CORD REMOVAL".
2. Now, the switch mounting angle should be removed from
the rear cabinet.
3. Remove the two (2) screws and the two (2) nuts holding the
voltage select switches and the switch spacer to the switch
mounting angle.
4. Remove the voltage select switches and the switch spacer
f rom the switch mounting angle.
5. Now, the voltage select switches are free.
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCHES (1), (2) AND MONITOR
SWITCHES (1), (2) REPLACEMENT
REMOVAL
1. Disconnect the power supply cord and then remove outer
case, referring to "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Remove outer control panel reffering to "CONTROL PANEL
ASSEMBLY AND CONTROL UNIT REMOVAL".
5. Disconnect all wire leads from the all switches.
6. Remove two (2) screws holding latch hook to oven flange.
7. Remove latch hook assembly from oven flange.
8. Remove the switch(es) in accordance with following
34
R-23GT-F
R-24GT-F
procedure.
DOOR SENSING SWITCH
Push the two (2) tabs outward and pull switch forwards to
release switch.
MONITOR SWITCHES OR SECONDARY INTERLOCK
SWITCHES
Remove one (1) screw and nut holding two switches together
to latch hook.
8. Now, switch(es) is now free.
of the latch hook.
2) Fasten both switches together to latch hook with one (1)
screw and nut.
SECONDARY INTERLOCK SWITCHES
1) Mount the two (2) switches side by side in the middle
position of the latch hook.
2) Fasten both switches together to latch hook with one (1)
screw and nut.
2. Re-install latch hook assembly and fasten it to oven flange
with two (2) screws.
3. Re-connect all wire leads to all switches, referring to
pictorial diagram. Be careful to ensure proper connection of
the wire leads.
4. Make sure that the monitor switches (1), (2) and all other
switches are operating properly. And check continuity of the
monitor circuit. Refer to chapter "Test Procedure" and
Adjustment procedure.
RE-INSTALL
1. Re-install the switch(es) in accordance with following
procedure.
DOOR SENSING SWITCH
Mount the door sensing switch in the lower position of latch
hook.
MONITOR SWITCHES
1) Mount the two (2) switches side by side in the top position
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCHES (1), (2) AND MONITOR
SWITCHES (1), (2) ADJUSTMENT
1. Disconnect the power supply cord and then remove outer
case, referring to "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
If the door sensing switch, secondary interlock switches (1), (2)
and monitor switches (1), (2) do not operate properly due to a
misadjustment, the following adjustment should be made.
4. Loosen the two (2) screws holding latch hook to the oven
cavity front flange.
5. 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
secondary interlock switches (1), (2) are activated with the
door closed. The horizontal position of the latch hook
should be adjusted so that the monitor switches (1), (2) are
activated with the door closed.
6. Secure the screws with washers firmly.
7. Check the operation of all switches. If all switches have not
activated with the door closed, loosen two (2) screws 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.
2. The door sensing switch and secondary interlock switches
(1), (2) interrupt the circuit before the door can be opened.
3. Monitor switches (1), (2) contacts close when door is
opened.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Door release
lever
Latch head
Switch lever A
Monitor switch (2)
Monitor switch (1)
Latch hook
Switch lever B
Secondary interlock
switch (2)
Joint lever
Latch lever
Secondary interlock
switch (1)
Door sensing switch
Switch lever C
Latch head
Figure C-3. Latch Switch Adjustments
DOOR REPLACEMENT
REMOVAL
1. Disconnect the power supply cord and then remove outer
case, referring to "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
2. Open the oven door and block it open.
3. Discharge two high voltage capacitors.
4. Remove the two (2) screws holding each of the upper and
lower oven hinges to the oven cavity.
5. Remove door assembly with upper and lower oven hinges
by pulling it forward.
6. Release upper and lower oven hinges from door assembly.
7. Now, door assembly is free.
NOTE:When individual parts are replaced, refer to "Door
Disassembly".
RE-INSTALL
1. Insert the upper and lower oven hinges into door hinge pins.
2. Insert the upper and lower oven hinges with door assembly
into rectangular holes of oven cavity front plate.
3. Make sure that the door is parallel with oven face lines (left
and upper side line) and door latch heads pass through the
latch holes correctly.
4. Fasten upper and lower oven hinges firmly to oven cavity
with two (2) screws on each hinge.
35
R-23GT-F
R-24GT-F
Note: After any service to the door;
(A) Make sure that door sensing switch, secondary
interlock switches (1), (2) and monitor switches (1), (2)
are operating properly. (Refer to chapter "Test
Procedures".).
(B) An approved microwave survey meter should be used
to assure compliance with proper microwave radiation
emission limitation standards.
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. If such were
the case, your oven could not be equipped with a
vent, the very purpose of which is to exhaust the
vapor-laden air from the oven cavity.
DOOR ADJUSTMENT
Door adjustment is performed with the door properly installed
and closed and while the oven hinges are loose.
1. Loosen upper and lower oven hinges with phillips head
screw driver.
2. Adjust the door by moving it vertically so that the top right
hand corner of the door is in line with the top of the control
panel frame assembly.
3. Tighten the upper and lower oven hinge screws.
After adjustment, make sure of the following:
1. Door latch heads smoothly catch the latch hook through the
latch holes, and the latch head goes through the center of
the latch hole.
2. Deviation of the door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
3. The door is positioned with its face depressed toward the
cavity face plate.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
UPPER
OVEN HINGE
OUTER CASE
CABINET
LOWER
OVEN HINGE
LATCH
HEADS
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.
Figure C-4. Door Replacement
DOOR DISASSEMBLY
3. Remove choke cover from door panel, referring to "CHOKE
COVER REMOVAL".
4. Remove two (2) screws holding the door handle to door.
5. Remove the door handle from door panel.
6. Now, door handle is free.
UPPER AND LOWER LATCH HEADS REMOVAL
7. Remove the door release lever from the door assembly.
8. Remove the three (3) screws holding the joint plate to the
door panel.
9. Release the latch spring from the tab of the joint lever and
joint plate.
10.Release the latch heads from joint lever and joint plate.
11.Now, the latch heads are free.
CHOKE COVER REMOVAL
1. Open the door and insert a putty knife (thickness of about
0.5mm) in gap between the choke cover and corner portion
of door panel to free engaging parts. Refer to Fig. C-5.
NOTE:As the choke cover and door panel are engage at 16
places, do not force any perticular part.
2. Remove the choke cover carefully. (If choke cover is
broken, replace with a new one.)
PUTTY KNIFE
CHOKE COVER
2
DOOR
HANDLE
UPPER
OVEN HINGE
PUTTY KNIFE
BENT
CHOKE COVER
DOOR PANEL
1
DOOR COMPONENTS REMOVAL
DOOR CASE REMOVAL
1. Remove the door assembly from oven cavity, referring to
"DOOR REMOVAL".
2. Remove choke cover from door panel, referring to "CHOKE
COVER REMOVAL".
3. Remove door handle from door panel, referring to "DOOR
HANDLE REMOVAL".
4. Bend up four (4) nails of door case.
5. Remove door case from door panel.
6. Now, the door case is free.
DOOR HANDLE REMOVAL
1. Remove the door assembly from oven cavity, referring to
"DOOR REMOVAL".
2. Place door assembly on a soft cloth with latches facing up.
DOOR GLASS REMOVAL
7. Remove the four (4) screws holding two (2) outside window
fixing plates to door panel.
8. Now, the door glass is free.
BENT
FRONT
LOWER
OVEN HINGE
LATCH HEAD
Figure C-5. Choke cover
36
1
2
RED
3
37
R
E
D
RED
BLK
BLK
BLK
BLK
RED
IC
RY3(2)
TAB2
TAB1
C
N
I
A
T1
RY1
7
2
3
4
5
6
1
3
BRN
RED
YLW
BLK
CN-A
WHT
CN-H
1 RED
2
BLU
4
BLK
GRN
COM
5
BLK
WHT
GRY
NO Blue case
Blue case
1 RED
2
3 WHT
(2)
SECONDARY
INTERLOCK
SWITCH (2)
(OVEN SIDE)
Blue case
ORG
GRY
COM
Blue case
E
G
6
R
E
D
G
R
Y
B
R
N
Figure S-1. Pictorial Diagram
P
N
K
O
R
G
BLK
(2)
POWER
TRANSFORMER
(2)
(1)
B
L
K
BRN
GRY
BLK
COM
(3)
NC
B
L
K
B
L
K
BLK
W
H
T
W
H
T
W
H
T
O
R
G
P
N
K
(2)
BLK
WHT
NC
BLK
BLK
B
L
U
R
E
D
COM
Y
L
W
(1)
NC
for Control panle
(Cabinet side)
BLOWER
MOTOR
NOISE FILTER AND FUSE
WHT
for front Power
transformer
COM
230/208V 60Hz
POWER SUPPLY CORD
WHT
BLU
RED
NOTE:
THE GROUNDING WIRE OF THE POWER
SUPPLY CORD HAS BEEN GROUDED BY A
SCREW.
THE SCREW MUST ALWAYS BE KEPT TIGHT.
GRN
VOLTAGE SELECT SWITCHES
for rear Power
transformer (Oven side)
MAGNETRON TEMP.
FUSE (2) 150˚C
MAGNETRON
(LOWER)
White
Case
Blue
Case
Black tape
(2)
MAGNETRON
THERMISTOR
1
2
BLK
WHT
5
ORG
WHT
BLU
STIRRER MOTOR
(LOWER)
O
R
G
(1)
POWER
TRANSFORMER
(1)
HIGH VOLTAGE
CAPACITOR
HICH VOLTAGE COMPONENTS
HIGH VOLTAGE
CAPACITOR
RED
WHT
RED
MAGNETRON
(UPPER)
MAGNETRON TEMP.
FUSE (1) 150˚C
RED
1
2
OVEN
THERMISTOR (1)
BLK
WHT
4
OVEN
THERMISTOR (2)
NO
ORG
WHT
WHT
NO
COM
DOOR
SENSING
SWITCH
COM
(1)
SECONDARY
INTERLOCK
SWITCH (1)
(CABINET SIDE)
NC
(2)
BRN
BLK
BLK
ORG
STIRRER MOTOR
(UPPER)
3
GRN
GRN
SP1
RY2(1)
CN-H
CN-B
B
L Blue
K case
C
N
I
G
CN-B
1 GRN
2 ORG
3 BLK
R
E
D
COM
BLK
OVEN TEMP.
FUSE 120˚C
2
RED
H
TOUCH CONTROL
PANEL
WHT
WHT
(1)
F
MONITOR
SWITCH (2)
(OVEN SIDE)
Y
L
W
D
NC
MONITOR
SWITCH (1)
(CABINET SIDE)
W
H
T
C
OVEN
LAMP
&
SOCKET
B
L
K
B
H.V. RECTIFIER
A
Blue case
1
H.V. RECTIFIER
Y
L
W
R-23GT-F
R-24GT-F
6
A
B
C
D
E
F
G
H
TB2
TB1
COM
NC
COM
NC
A1
A7
b
VRS1
CT1
RY3
RY2
c
a
d
RY1
–
–
+
5
D22
VC
Q3
KRC101M
6
C70
C61
R32 2.7k
B1
B2
D23 10EDB10
R70 4.7k
DOOR
SWITCH
VC
VC
SP1
R40 2.7k
(J3)
(A)
(J4)
ZD2
HZ4A2
R5 4.7k
20k
(J6)
R3 4.7k
VC
H1
C5
–
MAGNETRON
THERMISTOR
ON
60
55
50
45
40
35
33
5
10
15
20
25
30
32
P30
P31
P32
P33
P34
P35
P36
P37
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
IC3
R83 4.7k
R82 4.7k
R81 4.7k
R80 4.7k
IC1
IZA633DR
64
1
CF1 CST4.00MGW
VCC
VEE
AVSS
VREF
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P43
P42
INT1
INT0
RESET
P71
P70
XIN
XOUT
VSS
(A)
OVEN
THERMISTOR (2)
H3
C62
0.1µ/50v
C63
0.1µ/50v
47µ/10v
C6
+
Q60 KRA101M
OVEN
THERMISTOR (1)
C60
0.1µ
/50v
(B)
B3
10k
(J5)
R33
4.7k
(C)
R65 6.8k
R66
4.7k
C7
Figure S-2a. Control Panel Circuit (R-23GT-F)
(B)
IC2
–
G12
G11
G10
G9
DEF.
G1
LED1
G2
NO.
R50 100
G3
X2
CHECK
20
19
18
17
0
9
8
7
G4
1
G8
16
15
6
5
14
13
4
3
12
11
2
1
SIGNAL
CHECK
G7
SET
G6
R86 4.7k
SELECTA EXPRESS STOP/
TIME DEFROST CLEAR
G5
R85 4.7k
SELECTA DOUBLE
START
POWER QUANTITY
5
IF NOT SPECIFIED, 0.01µ / 16v
IF NOT SPECIFIED, 1SS270A
IF NOT SPECIFIED, 1/4w ± 5%
–
+
+
–
C2 0.1µ/50v
A0 1 8 VCC
TEST
A1
A2
SCL
VSS 4 5 SDA
Q21
KRC101M
D101
–
+
R102 4.7k
Q23 DTD143ES
Q22
DTD143ES
D100
C1 2200µ/25v
Q20
DTB143ES
D4
D3
Q2
DTA123ES
R64 4.7k
ZD1
HZ12B1
R1 470
R2 470
C21
10µ/25v
+
C4 0.1µ/50v
C8 0.1µ/50v
+
4
NOTE :
MICRO 2
MICRO 1
OVEN LAMP
STIRRER
MOTOR
BLOWER
MOTOR
AC208V
60Hz
A5
C64
(J9)
VRS2
(J1)
(J2)
5.6k
C10
AC230V
60Hz
10G471K x 2
D21
13
12
11
10
01
02
03
04
05
06
07
LIGHT EMITTING DIODE
9
D2
VC
8
R51 100
Q1 KIA7805PI
7
D1
C31
6
R52 100
A3
D20
R100 820F
C20
0.1µ/50v
C9
0.1µ/50v
C30 47µ/10v
C3 47µ/10v
R4 4.7k
R30 100
R31 15k
5
R53 100
R54 100
R88 4.7k
10EDB10 x 4
C100 47µ/10v
4
R101 100k
38
C101
3
R71 4.7k
2
R62 33k
G
R61 4.7k
4
3
1
2
H
R87 4.7k
F
R55 100
R56 100
R57 100
E
R58 100
C
11 1 16
12
13
14
15
16
17
GND 8 9
B
3
D70
A
R84 4.7k
D
2
R60 1.1k
1
R63 1.5k
T1
R-23GT-F
R-24GT-F
6
A
B
C
D
E
F
G
H
TB2
TB1
COM
NC
COM
NC
A1
A7
b
VRS1
CT1
RY3
RY2
c
a
d
RY1
–
–
+
5
D22
VC
Q3
KRC101M
H
6
C70
C61
R32 2.7k
B1
B2
D23 10EDB10
R70 4.7k
DOOR
SWITCH
VC
VC
SP1
R40 2.7k
(J3)
(A)
(J4)
ZD2
HZ4A2
R5 4.7k
10k
(J6)
R3 4.7k
VC
H1
C5
–
MAGNETRON
THERMISTOR
ON
60
55
50
45
40
35
33
5
10
15
20
25
30
32
P30
P31
P32
P33
P34
P35
P36
P37
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
IC3
R83 4.7k
R82 4.7k
R81 4.7k
R80 4.7k
IC1
IZA633DR
64
1
CF1 CST4.00MGW
VCC
VEE
AVSS
VREF
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P43
P42
INT1
INT0
RESET
P71
P70
XIN
XOUT
VSS
(A)
OVEN
THERMISTOR (2)
H3
C62
0.1µ/50v
C63
0.1µ/50v
47µ/10v
C6
+
Q60 KRA101M
OVEN
THERMISTOR (1)
C60
0.1µ
/50v
(B)
B3
20k
(J5)
R33
4.7k
(C)
R65 6.8k
R66
4.7k
R64 4.7k
Figure S-2b. Control Panel Circuit (R-24GT-F)
(B)
IC2
–
Q2
DTA123ES
G12
G11
G10
G9
DEF.
G1
LED1
G2
NO.
R50 100
G3
X2
CHECK
20
19
18
17
0
9
8
7
G4
1
G8
16
15
6
5
14
13
4
3
12
11
2
1
SIGNAL
CHECK
G7
SELECTA EXPRESS STOP/
TIME DEFROST CLEAR
G6
R86 4.7k
SET
G5
R84 4.7k
SELECTA DOUBLE
START
POWER QUANTITY
5
IF NOT SPECIFIED, 0.01µ / 16v
IF NOT SPECIFIED, 1SS270A
IF NOT SPECIFIED, 1/4w ± 5%
–
+
+
–
C2 0.1µ/50v
A0 1 8 VCC
TEST
A1
SCL
A2
VSS 4 5 SDA
Q21
KRC101M
D101
–
+
R102 4.7k
Q23 DTD143ES
Q22
DTD143ES
D100
C1 2200µ/25v
Q20
DTB143ES
D4
D3
+
C7
ZD1
HZ12B1
R1 470
R2 470
C21
10µ/25v
+
4
NOTE :
MICRO 2
MICRO 1
OVEN LAMP
STIRRER
MOTOR
BLOWER
MOTOR
AC208V
60Hz
A5
C4 0.1µ/50v
C8 0.1µ/50v
D2
5.6k
C10
VRS2
(J1)
(J2)
C64
(J9)
LIGHT EMITTING DIODE
9
D1
VC
8
R51 100
Q1 KIA7805PI
7
AC230V
60Hz
10G471K x 2
D21
6
R52 100
10EDB10 x 4
C31
C9
0.1µ/50v
C30 47µ/10v
5
R53 100
R54 100
R88 4.7k
A3
D20
R100 820F
4
C100 47µ/10v
39
R101 100k
3
C101
C20
0.1µ/50v
13
12
11
10
01
02
03
04
05
06
07
11 1 16
12
13
14
15
16
17
GND 8 9
C3 47µ/10v
R4 4.7k
R30 100
R31 15k
2
R71 4.7k
G
R62 33k
4
3
1
2
s
R55 100
R56 100
R57 100
F
R87 4.7k
E
R58 100
D
R61 4.7k
C
3
D70
A
R85 4.7k
B
2
R60 1.1k
1
R63 1.5k
T1
R-23GT-F
R-24GT-F
6
A
B
C
D
E
F
G
H
R-23GT-F
R-24GT-F
1
2
4
3
1
5
6
13
DIP
A
A
F
8
C30
R5
B
+
+
R33
R32
R31 5
4
Q60
-
CF1
32
33
B
C5
C6
ZD2
40
3 25
R3
C7
1
E
B
Q2
3
2
1
16
CN-D
15
IC3
20
50
1
IC1
CN-G
4
C
5
12
C
IC2
C31
E
R83
C83
R82
C82
R81
C81
R80
C80
R58
R57
R56
R55
R54
R53
R52
R51
B
1
R30
R50
9
6
5
(J3)
(J4)
1
64
R62
C3
3
B
SP1
10
(J9)
Q22 R102
D21 E
MICRO 1
D101
C63
R40
(C10)
E
B
RY2
Q23
E
+
C100
+
-
D100
14
B
C1
11
TB2
E
R100
16
(ZD1)
Q1
-
D22
MICRO 2
(R1)
(R2)
R101
RY3
15
D
C4
+
1
C62
1
CN-B
CN-H
Q3
C2
C9
TB1
F
F
CT1
17
7
P
S
P
12
(VRS2)
(J2)
POWER
VRS1
(J1)
T1
POWER
1
OL SM TTM
G
C8
R4
(J6)
C70
R70
R64
R63
9
(J5)
-
3
D70
8
C101
C61
R61
R71
D23
E
8
7
60
R65
R60
D
R66
C64
J85
C60
10
55
R84
(J91)
(J90)
(J89)
J88
J87
J86
G
D3
CN-1
RY1
-
D20
D4
+
D2
C20
-
D1
+
B
C21
E
Q21
B
E
Q20
13
H
H
Figure S-3. Printed Wiring Board
1
2
4
3
40
5
6
R-23GT-F
R-24GT-F
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.
DESCRIPTION
Q'TY
CODE
1
2
2
1
1
1
2
1
2
3
3
2
2
2
2
2
1
2
2
AV
AF
BA
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
1-12
1-13
1-14
1-15
1-16
1-17
1-17
FH-HZA064WRE0
QSOCLA026WRZZ
RV-MZA335WRZZ
FMOTEA503WRKZ
FPWBFA383WRKZ
FACCDA115WRKZ
FH-HZA070WRE0
FW-QZA117WRK0
FFS-BA033WRKZ
QSW-MA087WRE0
QSW-MA085WRE0
RC-QZA191WRE0
RC-QZA260WRE0
RLMPTA081WRZZ
RMOTDA209WRE0
QFS-TA014WRE0
QFS-TA015WRE0
RTRN-A454WRE0
RTRN-A455WRE0
Oven thermistor (2)
Oven lamp socket
Magnetron
Blower motor
Noise filter
Power supply cord
Oven thermistor (1) & Magnetron thermistor
High voltage rectifier assembly
Monitor switch (V-5220Q) and fuse (20A) assembly
Voltage select switch
Secondary interlok switch and Door sensing switch
High voltage capacitor ( Manufacturing discontinuance)
High voltage capacitor ( May be used from Feb. / 2006 prod.)
Oven lamp
Stirrer motor
Temperature fuse 150C (MG.)
Temperature fuse 120C (OVEN)
Power transformer [R-23GT-F]
Power transformer [R-24GT-F]
AN
AY
AM
AU
-AF
AF
AY
AU
AK
AR
AG
AG
BM
BM
When the new high voltage capacitor RC-QZA260WRE0 is used instead of old part (RC-QZA191WRE0), please use the
new capacitor holder LBNDKA068WRP0, because the sizes of the old high voltage capacitor and the new one are
different.
CABINET PARTS
2222222222-
1
2
3
4
5
5-1
5-2
6
7
8
FDAI-A275WRTZ
PSHEGA009WREZ
PSHEGA010WREZ
GCOVAA350WRPZ
FFTASA064WRY0
PCUSUA585WRPZ
PREFHA059WRP0
GCABUA860WRPZ
FFPF-A016WRK0
TMAPCA778WRRZ
Base plate assembly
Rubber sheet D
Rubber sheet E
Rear cabinet
Oven lamp access cover assembly
Cushion
Reflector
Outer case cabinet
Vibration-proof sheet
Schematic diagram
1
2
2
1
1
1
1
1
1
1
BC
AF
AE
AX
AN
AF
AF
BD
AU
AE
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
BP
BP
AC
AB
AB
AE
AB
AE
AB
AA
AB
AA
AB
AA
AB
AA
AM
AA
AA
AA
AB
AA
AB
AA
AA
AA
AA
AA
AD
AB
CONTROL PANEL PARTS
3- 1
3- 1
3- 1A
3- 1B
3- 1C
3- 1D
3- 1E
C1
C2
C3
C4
C5
C6
C7
C8-9
C10
C20
C21
C30
C31
C60
C61
C62
C63
C64
C70
C100
C101
CF1
D1-4
DPWBFC508WRUZ
DPWBFC509WRUZ
QCNCMA308DRE0
QCNCMA312DRE0
QCNCMA039DRE0
QCNCWA030DRE0
QLUGPA012DRE0
VCEAB51EW228M
VCKYD11HF104Z
VCEAB31AW476M
VCKYD11HF104Z
VCEAB31AW476M
VCKYD11HF104Z
VCKYD11CY103N
VCKYD11HF104Z
VCKYD11CY103N
VCEAB31HW104M
VCEAB31EW106M
VCEAB31AW476M
VCKYD11CY103N
VCKYD11HF104Z
VCKYD11CY103N
VCKYD11HF104Z
VCKYD11CY103N
VRD-Q12EF562J
VCKYD11CY103N
VCEAB31AW476M
VCKYD11CY103N
RCRS-A010DRE0
VHD10EDB10+-1T
Control unit [R-23GT-F]
Control unit [R-24GT-F]
4-pin connector (A)
3-pin connector (B)
3-pin connector (H)
12-pin connector (G)
Tab terminal (TAB1,TAB2)
Capacitor 2200 uF
25V
Capacitor
0.1 uF
50V
Capacitor
47 uF
10V
Capacitor
0.1 uF
50V
Capacitor
47 uF
10V
Capacitor
0.1 uF
50V
Capacitor 0.01 uF
16V
Capacitor
0.1 uF
50V
Capacitor 0.01 uF
16V
Capacitor
0.1 uF
50V
Capacitor
10 uF
25V
Capacitor
47 uF
10V
Capacitor 0.01 uF
16V
Capacitor
0.1 uF
50V
Capacitor 0.01 uF
16V
Capacitor
0.1 uF
50V
Capacitor 0.01 uF
16V
Resistor
5.6k ohm 1/4W
Capacitor 0.01 uF
16V
Capacitor
47 uF
10V
Capacitor 0.01 uF
16V
Ceramic resonator CST4.00MGW
Diode (10EDB10)
41
R-23GT-F
R-24GT-F
REF. NO.
D20-22
D23
D70
D100-101
IC1
IC2
IC3
LED1
Q1
Q2
Q3
Q20
Q21
Q22-23
Q60
R1-2
R3-5
R30
R31
R32
R33
R40
R50-58
R60
R61
R62
R63
R64
R65
R66
R70-71
R80-88
R100
R101
R102
(J5)
(J5)
(J6)
(J6)
RY1
RY2-3
SP1
T1
CT1
VRS1-2
ZD1
ZD2
3- 2
3- 2-1
3- 2-2
3- 2-3
3- 3
3- 4
3- 5
3- 6
PART NO.
VHD1SS270A/-1
VHD10EDB10+-1T
VHD1SS270A/-1
VHD1SS270A/-1
RH-IZA633DRE0
RH-IZA980DRE0
RIC--A025BDE0
VHPSL3966T/1B
RIC--A022BDE0
VSDTA123ES/-3
RH-TZA036CBE0
VSDTB143ES/-3
RH-TZA036CBE0
VSDTD143ES/-3
RH-TZA037CBE0
VRD-Q12EF471J
VRD-Q12EF472J
VRD-Q12EF101J
VRD-Q12EF153J
VRD-Q12EF272J
VRD-Q12EF472J
VRD-Q12EF272J
VRD-Q12EF101J
VRD-Q12EF112J
VRD-Q12EF472J
VRD-Q12EF333J
VRD-Q12EF152J
VRD-Q12EF472J
VRD-Q12EF682J
VRD-Q12EF472J
VRD-Q12EF472J
VRD-Q12EF472J
VRN-R12EK821F
VRD-Q12EF104J
VRD-Q12EF472J
VRD-Q12EF103J
VRD-Q12EF203J
VRD-Q12EF203J
VRD-Q12EF103J
RRLY-A071DRE0
RRLY-A094DRE0
RALM-A014DRE0
RTRNPA095DRE0
RTRN-026CHRE0
RH-VZA034DRE0
VHEHZ12B1//-1
VHEHZ4A2///-1
FPNLCB468WRK0
FUNTKA773WRE0
HDECAA195WRP0
PCUSUA417WRP0
LANGTA243WRW0
XEPS730P10XS0
XEPS740P12000
LX-BZA138WREZ
DESCRIPTION
Diode (1SS270A)
Diode (10EDB10)
Diode (1SS270A)
Diode (1SS270A)
LSI
IC (AT24C02-10PC2.5)
IC (KID65004AP)
Light emitting diode
IC (KIA7805PI)
Transistor (DTA123ES)
Transistor (KRC101M)
Transistor (DTB143ES)
Transistor (KRC101M)
Transistor (DTD143ES)
Transistor (KRA101M)
Resistor
470 ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
100 ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
2.7k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
2.7k ohm
1/4W
Resistor
100 ohm
1/4W
Resistor
1.1k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
33k ohm
1/4W
Resistor
1.5k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
6.8k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
820 ohm (F) 1/4W
Resistor
100k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
10k ohm
1/4W [R-23GT-F]
Resistor
20k ohm
1/4W [R-24GT-F]
Resistor
20k ohm
1/4W [R-23GT-F]
Resistor
10k ohm
1/4W [R-24GT-F]
Relay (OJE-SS-112LM)
Relay (OMIF-S-112LM)
Buzzer (PKM22EPT)
Touch control transformer
Current transformer
Varistor (10G471K)
Zener diode (HZ12B1)
Zener diode (HZ4A2)
Control panel frame with key unit
Key unit
Decoration metal fittings
Cushion
Control panel mounting angle
Screw; control unit mounting
Screw; control panel mounting angle mounting
Screw; decoration panel mounting for earth
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
4- 8
4- 9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
PGLSPA632WREZ
FDUC-A345WRY0
*************
PFILWA063WRPZ
MLEVPA153WRF0
MLEVPA154WRF0
MLEVPA155WRF0
MSPRCA075WRE0
MSPRCA076WRE0
PHOK-A081WRF0
MHNG-A216WRM0
PSPAGQ002YBE0
PCUSU0407WRP0
FGLSPA067WRYZ
FPLT-A008WRY0
FPLT-A009WRY0
LANGKA762WRP0
Lamp glass
Exhaust duct assembly
Oven cavity (Not a replaceable part)
Oven light screen (Inside)
Switch lever A
Switch lever B
Switch lever C
Switch spring A
Switch spring B
Latch hook
Lower oven hinge
Vibration-proof spacer
Cushion
Ceramic shelf
Stirrer antenna upper assembly
Stirrer antenna lower assembly
Partition angle R
Q'TY
3
1
1
2
1
1
1
1
1
1
1
1
1
2
1
2
3
1
1
1
1
1
9
1
1
1
1
1
1
1
2
9
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
1
5
2
1
CODE
AA
AB
AA
AA
AW
AN
AE
AS
AE
AA
AA
AC
AA
AC
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AG
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AG
AN
AG
AU
AH
AD
AB
AA
AZ
AT
AP
AB
AF
AA
AA
AB
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
AG
AP
-AD
AC
AC
AC
AB
AB
AP
AG
AA
AA
BH
AV
AV
AE
OVEN PARTS
∆
∆
∆
42
R-23GT-F
R-24GT-F
∆
REF. NO.
4-18
4-19
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
4-31
4-32
4-33
4-34
4-35
4-36
4-37
4-38
4-39
4-40
4-41
4-42
4-43
4-44
4-45
4-46
4-47
4-48
PART NO.
LANGQA228WRW0
LBNDKA075WRP0
LBNDKA068WRP0
PGIDHA054WRW0
NSFTPA031WRF0
LANGQA622WRPZ
PCUSUA417WRP0
MHNG-A215WRM0
PCUSUA413WRP0
PCUSUA415WRP0
PDUC-A729WRF0
PDUC-A564WRW0
PCUSUA414WRP0
LANGKA679WRPZ
HDECQA147WRM0
LANGFA195WRW0
LBSHC0006YBE0
LANGQA593WRPZ
FFIL-A003WRK0
HDECEA001WRP0
HDECQA146WRM0
PCUSGA409WRP0
PCOVPA422WRFZ
LANGQA512WRP0
LANGKA475WRP0
LANGKA760WRP0
PCUSUA268WRP0
MSPRCA101WRE0
LSUB-A133WRPZ
LANGTA408WRWZ
PSPA-A114WRF0
LSUB-A134WRPZ
DESCRIPTION
Oven lamp mounting plate
Capacitor holder for capacitor RC-QZA191WRE0
Capacitor holder for capacitor RC-QZA260WRE0 (New)
Water-proof cover
Antenna motor shaft
Noise filter angle
Cushion
Upper oven hinge
Cushion
Cushion
Air duct
Mg exhaust duct
Cushion
Fixing angle S
Corner cap right
Chassis support
Cord bushing [R-23GT-F] [R-24GT-F]
Blower motor angle
Air intake filter assembly
Decoration sash
Corner cap left
Cushion
Splash cover
Thermistor angle
Switch mounting angle
Switch lever
Cushion
Switch lever spring C
Thermo contactor
Lamp glass mounting plate
Switch spacer
Hinge support angle
Q'TY
1
1
1
1
2
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
CODE
AF
AD
AD
AF
AH
AK
AB
AG
AG
AC
AL
AP
AD
AD
AE
AG
AD
AH
AV
AR
AE
AE
BK
AE
AD
AE
AA
AC
AD
AK
AC
AD
1
1
1
1
1
1
2
2
1
2
4
1
2
9
1
1
2
1
1
1
1
1
BT
BD
AP
AR
AX
AF
AM
AV
AF
AC
AC
AE
AG
AQ
AP
AM
AM
AG
AF
AF
AM
1
1
1
1
1
3
1
1
2
1
1
1
1
1
1
AG
AH
AQ
BD
AA
AB
AL
AC
AF
AD
AB
AF
AA
AC
AC
DOOR PARTS
∆
∆
∆
5
5- 1
5- 2
5- 3
5- 4
5- 5
5- 6
5- 7
5- 8
5- 9
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-17
5-18
5-19
5-19
5-20
CDORFB029WRKZ
DDORFB192WRKZ
GCOVAA242WRY0
FHNDMA011WRY0
GCOVHA350WRF0
JHNDMA039WRM0
LANGKA766WRP0
PCUSGA430WRP0
PGLSPA457WRE0
PPACGA142WRP0
PGID-0024WRF0
PGID-0025WRF0
PSPA-A102WRE0
XHTS740P08RV0
FANGKA200WRY0
FLEVFA019WRY0
LSTPCA002WRM0
MLEVPA220WRF0
MSPRCA097WRE0
HBDGCA066WRE0
HBDGCA067WRE0
PCUSGA486WRP0
Door assembly
Door panel assembly
Door case
Door lever assembly
Choke cover
Door handle
Outside window fixing plate
Cushion
Door glass
Door case packing
Handle guide
Handle spacer
Door case spacer
Screw : 4mm x 8mm
Latch fixing angle
Joint lever
Latch head
Head lever
Latch spring
Door badge [R-23GT-F]
Door badge [R-24GT-F]
Handle cushion
6- 1
6- 2
6- 3
6- 4
6- 5
6- 6
6- 7
6- 8
* 6- 9
6-10
6-11
6-12
6-13
6-14
6-15
TINSEB105WRRZ
TLABHA024WRR0
FW-VZB755WRE0
FW-VZC077WREZ
LHLDWQ005YBE0
LBNDKA079WRE0
FW-VZC039WREZ
TCAUAA130WRR0
QW-QZA238WRE0
TCAUAA288WRRZ
TCAUA0165WRR0
TCAUAA279WRRZ
LHOLDA004WRE0
TCAUAA181WRR0
TCAUAA165WRR0
Instruction manual
Menu sticker
Switch harness
Main wire harness
Purse lock LL
Wire holder
Supply harness
Lamp caution
High voltage wire
Monitor caution label
DHHS caution label
Voltage caution label
Cord holder
Filter caution label
User caution
MISCELLANEOUS
43
R-23GT-F
R-24GT-F
REF. NO.
PART NO.
DESCRIPTION
6-16
LHLDWQ004YBE0
Purse lock L
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
7-11
7-12
7-13
7-14
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-23
XCBWW30P08000
XBPS730P28KS0
XNES730-24000
LX-BZA130WRE0
LX-BZA116WRE0
LX-BZA041WRE0
LX-BZA132WREZ
LX-BZA138WREZ
LX-BZA139WREZ
LX-EZA004WRE0
XOTS740P06000
LX-NZ0082WRE0
LX-BZA152WREZ
LX-BZA164WREZ
LX-CZA095WREZ
LX-WZA035WRE0
XOTS740P10RV0
XOTS740P08000
XCHWW40P08000
XBPS730P50K00
XJPS740P10000
XOTWW40P08000
LX-BZA169WREZ
Screw : 3mm x 8mm
Screw : 3mm x 28mm
Nut : 3mm x 2.4mm
Special screw
Special screw
Special screw
Special screw
Special screw
Special screw
Special screw
Screw : 4mm x 6mm
Special nut
Special screw
Special screw
Special screw
Special washer
Screw : 4mm x 10mm
Screw : 4mm x 8mm
Screw : 4mm x 8mm
Screw : 3mm x 50mm
Screw : 4mm x 10mm
Screw : 4mm x 8mm
Special screw
Q'TY
CODE
1
AA
6
2
4
1
2
2
4
11
1
2
1
1
1
12
3
1
3
6
2
2
3
32
4
AB
AB
AE
AD
AD
AA
AB
AB
AA
AA
AA
AA
AB
AC
AB
AB
AB
AA
AB
SCRE,NUTS AND WASHERS
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.
PACKING AND ACCESSORIES
TOP PAD ASSEMBLY
FPADBA313WRK0
DOOR PROTECTION SHEET
SPADPA552WRE0
WRAP COVER
BOTTOM PAD ASSEMBLY
FPADBA314WRK0
DOOR PAD
SPADF0341WRE0
6-2 MENU STICKER
6-1 INSTRUCTION MANUAL
PACKING CASE
SPAKCC524WRE0 [R-23GT-F]
SPAKCC526WRE0 [R-24GT-F]
* Not replaceable items.
44
AA
AB
AC
R-23GT-F
R-24GT-F
2
1
4
3
6
5
OVEN AND CABINET PARTS
7-19
4-20
6-8
A
7-22
2-5-2
6-11
A
4-23
2-6
2-5-1
7-9
4-30
7-22
2-4
7-22
4-33
1-6
6-12
2-5
4-43
7-22
7-22
B
7-15
7-22
B
7-22
2-8
7-21
7-22
2-7
4-26
7-22
7-20
7-22
4-2
1-7
1-13
4-38
7-1
4-47
7-14 1-15
7-8
4-12
1-14
4-13
7-14
4-29
1-6
7-13
4-40
B
7-16
A2
A1
7-6
1-7
B
A1
A2
7-6
4-1
4-37
4-28
7-8
4-21
4-46 7-23
x-2
7-21
C
1-10
4-27
4-25
7-22
4-18
7-22
1-10
C
D
4-45
7-14
4-3
4-24
7-21
7-3
7-22
1-16
D
4-41
6-6
7-1
1-2
4-42
4-48
C
7-4
1-3
7-17
D
7-21
4-13
6-10
1-12
7-22
1-3
7-23
7-17
4-19
4-11
7-8
4-32
7-22
1-8
1-15
E
E
7-18
1-12
4-4
1-1
4-36
7-16
4-15
4-22
1-5
7-8
7-8
6-14
7-10
7-12
4-9
7-7
4-21
C
1-9
7-3
4-31
7-14
1-14
F
4-34
4-8
7-18
7-2
6-6
4-44
7-14
7-8
7-8
1-9
7-18
4-5
1-17
D
F
4-6
1-11
4-39
4-16
4-10
1-11
4-9
4-7
1-17
1-11
7-2
1-4
7-11
2-1
4-17
G
G
6-13
7-5
4-14
2-2
4-35
7-22
2-3 x2 both side
7-15
H
7-17
1
2
H
7-15
7-8
2-2
4
3
45
5
6
R-23GT-F
R-24GT-F
2
1
4
3
6
5
3-2
CONTROL PANEL PARTS
3-1
3-2-3
A
A
6-15
3-4
3-2-2
B
B
3-5
5
DOOR PARTS
3-6
3-3
C
C
5-4
3-2-1
5-12
5-14
D
5-13
D
5-1
5-13
5-15
5-8
5-6
E
5-18
5-16
5-13
E
5-17
5-9
5-7
6-3
MISCELLANEOUS
F
F
5-6
5-10
5-13
5-3
5-2
5-20
5-19
5-11
G
G
5-10
6-4
5-5
To power transformer
To high voltage capacitor
6-7
Actual wire harness may be different from illustration.
6-9
6-5
H
1
2
4
3
6-16
5
H
6
COPYRIGHT © 2005 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.
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