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R
SERVICE MANUAL
S40189R244M//
MICROWAVE OVEN
MODELS
R-244(W)M
R-244(G)M
R-244(B)M
R-244(SL)M
In interests of user-safety the oven should be restored to its
original condition and only parts identical to those specified
should be used.
TABLE OF CONTENTS
Page
SERVICING ............................................................................................................................................. 2
CAUTION/WARNING............................................................................................................................... 3
PRODUCT SPECIFICATIONS ................................................................................................................ 3
APPEARANCE VIEW................................................................................................................................ .4
OPERATION SEQUENCE........................................................................................................................ 5
OUTPUT POWER TEST PROCEDURE................................................................................................... 6
TEST PROCEDURES................................................................................................................................ 7
TOUCH CONTROL ASSEMBLY .............................................................................................................. 9
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................... 13
MICROWAVE MEASUREMENT PROCEDURE...................................................................................... 16
SCHEMATIC DIAGRAMS.........................................................................................................................17
PICTORIAL DIAGRAM .......................................................................................................................... 18
CONTROL PANEL CIRCUIT ................................................................................................................. 19
SWITCH UNIT CIRCUIT DIAGRAM ....................................................................................................... 20
PRINTED WIRING BOARD OF CONTROL PANEL DIAGRAM ............................................................. 21
PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM.................................................................... 22
PARTS LIST........................................................................................................................................... 23
EXPLODED DIAGRAM OF OVEN.......................................................................................................... 26
CONTROL PANEL/DOOR PARTS ......................................................................................................... 27
PACKING AND ACCESSORIES ........................................................................................................... 28
SHARP CORPORATION
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SERVICING
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts
will result in electrocution:High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier, High voltage wires.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING AGAINST THE CHARGE OF THE HIGH-VOLTAGE CAPACITOR
The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the high-voltage capacitor (that is, of the connecting lead from the
high-voltage rectifier) against the chassis using a screwdriver with an insulated handle.
Sharp recommend that wherever possible, fault-finding is carried out with the supply disconnected. In some cases,
it may be necessary to connect the supply with the cover removed to carry out fault investigation in the control
circuitry. In such cases, the high voltage circuit should be disabled as described below to reduce the hazards:-
• Carry out 3D checks (see above).
• Disconnect the supply leads from the high voltage transformer, making a note of the polarity. Insulate the
connectors, ensuring they are positioned away from the transformer and fastened there.
• Connect any relevant test equipment e.g. voltmeter.
• Reconnect the oven to the supply, then close the door.
• Note the results of the test, taking care to keep clear of the operational oven.
• Carry out 3D checks (see above).
• Reconnect the leads to the transformer. Take care to observe correct polarity.
• Carry out 4R checks (see below).
Microwave ovens should not be used without a load. 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 microwave timer for one (1) minute, set the
power level to HIGH (100%) and push the start key. When the one (1) minute has elapsed (timer at zero) carefully check
that the water is now hot.
AFTER REPAIR REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
When all service work is completed, and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test carried out.
IMPORTANT: If the oven becomes inoperative because of a blown F8A Fuse, check the monitored latch switch and
monitor switch before replacing the fuse .
WARNING: WIRING / RE-WIRING
Before carrying out any work; carry out 3D checks.
1) Disconnect the supply.
2) Open the door and wedge open.
3) Discharge the high voltage capacitor.
RE-WIRING
1) Wires must not touch:
a) High voltage parts.
b) Parts that become hot.
c) Sharp edges.
d) Movable parts.
2) Positive lock connectors are fitted correctly
3) Wires are connected correctly as per pictorial diagram.
4) No wire leads are trapped by the outer wrap.
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CAUTION / WARNING
CAUTION
MICROWAVE RADIATION
Do not become exposed to radiation from the magnetron
or other parts conducting microwave energy. All input
and output microwave connections, waveguides, flanges
and gaskets must be secured. Never operate the
device without a microwave energy absorbing load
attached. Never look into an open waveguide or antenna while the device is energized.
Servicing and repair work must be carried out only by
trained service engineers.
The parts marked '*' on the parts list and schematic
diagram have voltages in excess of 250V.
Removal of the outer wrap gives access to potential
above 250V.
All the parts marked "∆" on the parts list may cause undue
microwave exposure, by themselves, or when they are
damaged, loosened or removed.
WARNING
WARNING
THIS APPLIANCE MUST BE EARTHED. THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE
If the mains lead is replaced, only part number QACCBA030WRE4 should be used
PRODUCT DESCRIPTION
SPECIFICATION
Power Requirements 230-240 Volts 50 Hertz Single phase, 3 wire grounded
Power Consumption 1.2kW
Power Output 800W watts nominal of RF microwave energy (measured by way of IEC60705)
Operating frequency of 2450 MHz
Case Dimensions Width 449mm / Height 282mm including foot / Depth 385mm
Cooking Cavity Dimensions Width 287mm / Height 220mm / Depth 311mm
Turntable diameter 272mm
Control Complement Touch Control System
Clock(1:00-12:59 or 0:00-23:59)
Microwave Power for Variable Cooking
Repetition Rate;
HIGH .................. Full power throughout the cooking time
MEDIUM HIGH ...................... approx. 70% of Full Power
MEDIUM ................................ approx. 50% of Full Power
MEDIUM LOW....................... approx. 30% of Full Power
LOW ...................................... approx. 10% of Full Power
EXPRESS COOK button
EXPRESS DEFROST button
POWER LEVEL/WEIGHT button
STOP/CLEAR button
START/AUTO MINUTE button
Net Weight Approx. 13.3 kg
As part of our policy of continuous improvement, we reserve the right to
alter design and specifications without notice
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APPEARANCE VIEW
OVEN
13
10
1. Door
1
2
3 4
5
6
8
9
7
11
2. Door hinges
3. Waveguide cover
4. Oven lamp
5. Control panel
6. Rubber seal
7. Door latch openings
8. Oven cavity
9. Door seals and sealing surfaces
10. Safety door latches
11. Ventilation openings
12. Outer case
13. Power supply cord
Turntable
Roller stay
12
Seal packing
1. Place the roller stay on the floor of the oven cavity,
engaging shaft.
2. Then place the turntable on the roller stay.
1.
1. DIGITAL DISPLAY
2. EXPRESS COOK pad
2.
3. EXPRESS DEFROST pad
4. TIMER Pads
5. POWER /WEIGHT STOP/CLEAR
START/AUTO MINUTE Pads
3.
4.
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OPERATING SEQUENCE
Latch hook
SW3: Stop switch
Door
SW2: Monitor switch
SW1: Monitored latch switch
Latch heads
OFF CONDITION
1. When the oven door is opened, the oven lamp comes on
at this time.
MICROWAVE COOKING CONDITION
CONNECTED COMPONENTS RELAY
Oven lamp, Fan motor, Turntable motor RY1
Power transformer RY2
2. When the cooking time is up, a single tone is heard and
the relays
RY1 + RY2 go back to their home position.
The circuits to the oven lamp, power transformer, fan
motor and turntable motor are cut off.
3. When the door is opened during a cook cycle, the
switches come to the following condition.
CONDITION
SWITCH CONTACT COOKING (NO COOKING)
Monitor switch COM-NC Open Closed
Monitored latch switch COM-NO Closed Open
Stop switch COM-NO Closed Open
DURING DOOR OPEN
The circuits to the power transformer, fan motor and
turntable motor are cut off when the monitored latch switch
and stop switch are made open.
The oven lamp remains on even if the oven door is opened
after the cooking cycle has been interrupted, because the
relay
RY1 stays closed. Shown in the display is the remaining
time.
HIGH, MEDIUM HIGH, MEDIUM, MEDIUM
LOW, LOW COOKING
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the power transformer
intermittently within a 32-second time base through the
relay contact which is coupled with the current-limiting relay
(RY2). The following levels of microwave power are given.
SETTING
32 sec. ON
HIGH
MEDIUM HIGH
MEDIUM
MEDIUM LOW
LOW
24 sec. ON
18 sec. ON
12 sec. ON
6 sec. ON
8 sec. OFF
14 sec. OFF
20 sec. OFF
26 sec. OFF
NOTE: The ON/OFF time ratio does not exactly correspond
to the percentage of microwave power, because
approx. 3 seconds are needed for heating up the
magnetron filament.
Approx. 100% = 800 Watts
Approx. 70% = 560Watts
Approx. 50% = 400 Watts
Approx. 30% = 240 Watts
Approx. 10% = 80 Watts
DOOR OPEN MECHANISM
The door can be opened by pulling the door.
Figure D-1. Door Open Mechanism
MONITORED LATCH SWITCH AND STOP
SWITCH
1. When the oven door is closed, the contacts (COM-NO)
must be closed.
MONITOR SWITCH
1. When the oven door is closed, the contacts (COM-NC)
must be opened.
2. When the oven door is opened, the contacts (COMNC) must be closed.
3. If the oven door is opened and he contacts (COM-NO)
of the monitored latch switch fail to open, the fuse F1
blows immediately after closing the contacts (COMNC) of the monitor switch.
CAUTION: BEFORE REPLACING A BLOWN FUSE
F1
TEST MONITORED LATCH SWITCH (SW1)
AND MONITOR SWITCH FOR PROPER
OPERATION. (REFER TO CHAPTER “TEST
PROCEDURE”).
FUSE
1. The fuse F1 blows when the contacts (COM-NO) of the
monitored latch switch remain closed with the oven
door open and when the contacts (COM-NC) of the
monitor switch are closed.
2. If the wire harness or electrical components are shortcircuited, the fuse F1 blows to prevent an electric shock
or fire hazard.
HVT THERMOSTAT 150˚C
The thermostat protects the high voltage transformer against
overheating. If the temperature goes up higher than 150˚C
because the fan motor is interrupted or the ventilation
openings are blocked, the thermostat will cycle, line voltage to the high voltage transformer will also cycle. (If
operated, check the magnetron for damage.)
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OPERATING SEQUENCE
THERMAL CUT-OUT 125˚C (OVEN)
The thermal cut-out located on the top of the oven cavity is
designed to prevent damage to the oven, if the food in the
oven catch fire due to over heating produced by improper
setting of cook time or failure of control unit. Under normal
operation, the thermal cut-out remains closed. However,
when abnormally high temperatures are reached within the
oven cavity, the thermal cut-out will open at 125˚C, causing
the oven to shut down. The defective thermal cut-out must be
replaced with a new one.
TURNTABLE MOTOR
The turntable motor drives the turntable roller assembly to
rotate the turntable.
OUTPUT POWER TEST PROCEDURE
MICROWAVE OUTPUT POWER (IEC-60705)
FAN MOTOR
The fan motor drives a blade which draws external cool air.
This cool air is directed through the air vanes surrounding
the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and vapours
given off from heating food. It is then exhausted through the
exhaust vents at the rear of the oven cavity.
NOISE FILTER
The noise filter assembly prevents radio frequency interference that might flow back into the power circuit.
The power output of this oven is rated using the method specified by IEC-60705. Full details of how to carry out this
procedure can be found in the Sharp Technical Training notes which is available from Sharp Parts Centre
(part number SERV-LITMW01).
Using this procedure, the heating time to raise 1000g of water by 10°C is approximately 50 seconds.
The IEC-60705 procedure must be carried out using laboratory-type procedures and equipment. These requirements
make the procedure unsuitable for routing performance checks. An indication of the power being produced by the oven
can however be obtained using the procedure given below.
Alternative simplified method:
1. Place 2 litres of cold water (between 12°C and 20°C) in a suitable container.
2. Stir the water and measure the temperature in °C. Note temperature as T1.
3. Place the container in the microwave and heat the water for 2 minutes on full power.
4. When the 2 minutes is completed, remove the container and stir the water. Note the water temperature as T2.
5. Calculate the output power using the following formula:
R.F. Power Output = (T2 - T1) x 70.
Note: The result from this test should be within 10% of the power rating stated on the rating label.
MICROWAVE LEAKAGE TEST
This oven should be tested for microwave leakage on completion of any repair or adjustment, following the procedure
described in the Sharp Technical Training notes (part number SERV-LITMW01). The maximum leakage permitted in
BS EN 60335-2-25 is 50W/m
therefore, any leakage which is detected should be investigated.
2
(equivalent to 5mW/cm2), however it is not normal to detect any significant leakage,
It is essential that only leakage detectors with current calibration traceable to the National Physical Laboratories are used.
Suitable leakage detectors : CELTEC A100
APOLLO X1
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TEST PROCEDURES
PROCEDURE
LETTER
A TOUCH CONTROL PANEL ASSEMBLY TEST
Do not touch the electrical parts and the printed wiring board to prevent an electric
CAUTION shock. Because the control unit is " TRANSLESS CIRCUIT " and all electrical parts
are used at A.C. line voltage.
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
Switch Unit, and troubleshooting by unit replacement is described according to the symptoms
indicated.
1. Switch Unit. Note : Check switch unit lead wire harness connection before replacement.
The following symptoms indicate a defective switch unit. Replace the switch unit.
a) When touching the keys, a certain key produces no signal at all.
b) When touching a key, two figures or more are displayed.
c) When touching the keys, sometimes a key produces no signal.
2. Control Unit
The following symptoms indicate a defective control unit. Before replacing the control unit
perform the Switch unit test (Procedure M) to determine if control unit is faulty.
2-1 In connection with keys.
a) When touching the keys, a certain group of keys do not produce a signal.
b) When touching the keys, no keys produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some dots do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding dots of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
COMPONENT TEST
B TACT SWITCH TEST
1. Disconnect the oven from the power supply.
2. Discharge the high voltage capacitor.
3. Remove the control unit from the control panel.
4. By using an ohmmeter, check the tact switch operation.
5. When the tact switch is not depressed, an ohmmeter should indicate an open circuit. When the tact
switch is depressed, an ohmmeter should indicate a short circuit. If improper operation is indicated,
the tact switch is probably defective and should be checked.
C RELAY TEST
Remove the outer case and check voltage between Pin No 5 of the 3 pin connector (A) and common
terminal of the relay (RY2) on the control unit with an A.C. voltmeter.
The meter should indicate rated voltage, if not check oven circuit.
RY1 and RY2 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
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 Approx. 18.0V D.C. Oven lamp / Turntable motor / Cooling fan motor
RY2 Approx. 7.0V D.C. High voltage transformer
unit is defective.
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PROCEDURE
LETTER
D SWITCH UNIT TEST
TEST PROCEDURES
COMPONENT TEST
If the display fails to clear when the STOP/CLEAR
key is depressed, first verify the lead wire harness
is making good contact, verify that the stop switch
operates properly; that is the contacts are closed
when the door is closed and open when the door is
open. If the stop switch is good, disconnect the
lead wire harness that connects the switch unit to
the display unit and make sure the stop switch is
closed (either close the door or short the stop
switch connector). Use the Switch unit matrix indicated on the switch unit circuit and place a jumper
wire between the pins that correspond to the
STOP/CLEAR key making momentary contact. If
the display unit responds by clearing with a beep
the switch unit is faulty and must be replaced. If the
display unit does not respond, it is a faulty and must
be replaced. If a specific key does not respond, the
above method may be used (after clearing the
display unit) to determine if the display unit or
switch unit is at fault.
START
AUTO MINUTE
POWER
WEIGHT
STOP
CLEAR
min.
10
min.
1
DEFROST
sec.
10
COOK
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
CN - C
1
2
3
4
5
6
CN - C
6Pin HARNESS
E PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on
the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given
below for repair.
Problem: POWER ON, indicator does not light up.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated voltage is not applied between Pin Check supply voltage and oven power cord.
No. 5 of the 3 pin connector (A) and the
common terminal of the relay RY2.
2 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
3 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
NOTE: *At the time of making these repairs,
ZD70
R70
R1
make a visual inspection of the varistor.
Check for burned damage. If any abnormal condition is detected, replace
the defective parts.
D71
c
(J1)
a
b
d
VRS1
RY2
RY1
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TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units.
(1) Switch Unit
(2) Control Unit
The principal functions of these units and the signals
communicated among them are explained below.
4) Relay Circuit
To drive the magnetron, fan motor, turntable motor and
light the oven lamp.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit
audible sounds (tact switch touch sound and completion
sound).
Switch Unit
The switch unit is composed of a matrix, signals generated
in the LSI are sent to the switch unit through R60, R61, R62
and R63.
When a switch button is touched, a signal is completed
through the switch unit and passed back to the LSI through
R81 and R83 to perform the function that was requested.
Control Unit
Control unit consists of LSI, ACL circuit, indicator circuit,
power source circuit, relay circuit, buzzer circuit, synchronizing signal circuit and back light circuit.
1) ACL
This circuit generates a signal which resets the LSI to the
initial state when power is supplied.
2) Indicator Circuit
This circuit consists of 4-digits, 12-segments and 3common electrodes using a Liquid Crystal Display.
3) Power Source Circuit
This circuit generates voltage necessary in the control unit
from the AC line voltage.
6) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock circuit.
It accompanies a very small error because it works on
commercial frequency.
7) Door Sensing Switch (Stop Switch)
A switch to "tell" the LSI if the door is open or closed.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LED1-LED3)
Symbol Voltage Application
VC +5V LSI(IC1)
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DESCRIPTION OF LSI
LSI(IXA085DR)
The I/O signal of the LSI(IXA085DR) are detailed in the following table.
Pin No. Signal I/O Description
1-12 SEG0 - OUT Segment data signal.
SEG11 Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (1) ................................ S6 SEG 6 (7)........................... S12
SEG 1 (2) ................................ S7 SEG 7 (8)............................. S5
SEG 2 (3) ................................ S8 SEG 8 (9)............................. S4
SEG 3 (4) ................................ S9 SEG 9 (10)........................... S3
SEG 4 (5) .............................. S10 SEG 10 (11)......................... S2
SEG 5 (6) .............................. S11 SEG 11 (12)......................... S1
13 R60 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 or R83 terminal
while the tact switch SW1 or SW8 is touched.
14 R61 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81or R83 terminal
while the tact switch SW2 or SW5 is touched.
15 R62 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 or R83 terminal
while the tact switch SW3 or SW6 is touched.
16 R63 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 or R83 terminal
while the tact switch SW4 or SW7 is touched.
17 AIN0 IN To input signal which communicates the door open/close information to LSI.
Door close "L" level signal (0V). Door open "H" level (+5V)
18-20 AIN1-AIN3 IN Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the
Model in operation is applied to set up its function.
21 VSS IN Power source voltage: 0V.
VSS voltage of power source circuit input.
22 R70 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). The signals holds "L" level
during microwave cooking and "H"
level while not cooking. In other cooking modes (variable cooking) the signal turns to "H" level and "L" level in
repetition according to the power level.
OFF
HIGH
OFF OFF
MEDIUM
HIGH
ON
ON
24 sec.
8 sec.
H : +5V
L : 0V
H : +5V
L : 0V
23 R71 OUT Signal to sound buzzer (2.0 kHz).
0.1 sec.
A: Tact switch touch sound.
B: Completion sound.
A
2 sec.
B
24 R72 OUT Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1). The
20.0 msec
square waveform voltage is delivered to
the RY1 driving circuit.
During cooking
25 R73 IN Terminal not used.
26 INT2 IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
20.0 msec
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H : +5V
L: 0V
H : +5V
L: 0V
H : +5V
L : 0V
H : +5V
L : 0V
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DESCRIPTION OF LSI
LSI(IXA085DR)
The I/O signal of the LSI(IXA085DR) are detailed in the following table
Pin No. Signal I/O Description
27 R81 IN Signal coming from tact switch.
When either of tact switches SW5-SW8 is touched, a corresponding signal out of
R60, R61, R62 and R63 will be input into R81. When no tact switch is touched, the
signal is held at "H" level.
28 INT1 IN Terminal not used.
29 R83 IN Signal coming from tact switch.
When either of tact switches SW1-SW4 is touched, a corresponding signal out of
R60, R61, R62 and R63 will be input into R83. When no tact switch is touched, the
signal is held at "H" level.
30-32 R90-R92 OUT Terminal not used.
33 XIN IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit with
respect to XOUT terminal.
34 XOUT OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
35 RESET IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
Temporarily set "L" level the moment power is supplied, at this time the LSI is reset.
Thereafter set at "H" level.
36 HOLD IN/OUT Connected to VDD.
37 VLC IN Signal synchronized with commercial power source frequency.
Signal similar to VSS.
38 COM1 OUT Common data signal.
Connected to LCD(C1).
39 COM2 OUT Common data signal.
Connected to LCD(C2).
40 COM3 OUT Common data signal.
Connected to LCD (C3).
41 COM4 OUT Terminal not used.
42 VDD IN Power source voltage input terminal.
Connected to VC.
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TOUCH CONTROL PANEL ASSEMBLY
SERVICING
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the circuits.
When handling these parts, the following precautions
should be strictly followed. CMOS LSI have extremely
high impedance at its input and output terminals. For this
reason, it is easily influenced by the surrounding high
voltage power source, static electricity charge in clothes,
etc., and sometimes it is not fully protected by the built-in
protection circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them
in aluminium foil. Also wrap PW boards containing
them in aluminium foil.
2) When soldering, ground the technician as shown in
the figure and use grounded soldering iron and work
table.
approx. 1M ohm
2. Shapes of Electronic Components
Transistor
2SA1267Y
KRA101M
KRC101M
B
C
E
KRC105M
3. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so.
To perform the servicing, power to the touch control panel
is available either from the power line of the oven itself or
from an external power source.
(1) Servicing the touch control panel with power
supply of the oven :
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD .
Therefore, when checking the performance of the
touch control panel, put the outer cabinet on the oven
to avoid touching the high voltage transformer, or
unplug the primary terminal (connector) of the high
voltage transformer to turn it off; the end of such
connector must be insulated with an insulating tape.
After servicing, be sure to replace the leads to their
original locations.
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 so
long enough that they may be separated from each
other. For those models, therefore, 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 brings about 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
the 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 brings about an operational state that is
equivalent to the oven door being closed. Connect an
external power source to the power input terminal of
the touch control panel, then it is possible to check and
repair the controls of the touch control panel; it is also
possible to check the sensor-related controls of the
touch control panel by using the dummy resistor(s).
4. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 30W
(It is recommended to use a soldering iron with a
grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC 10MHz type or more advanced model.
3) Others: Hand tools
5. Other Precautions
1) Before turning on the power source of the control unit,
remove the aluminium foil applied for preventing static
electricity.
2) Connect the connector 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.
R-244M -
12
Page 13
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
1. CARRY OUT 3D CHECKS.
2. Make sure that a definite "click" can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch heads to rise,
it should then possible to hear a "click" as the door
switches operate.)
3. Visually check the door and cavity face plate for damage
(dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
POWER SUPPLY CORD REPLACEMENT
Removal
1. CARRY OUT
2. Remove the single (1) screw holding the green/yellow
wire to the cavity.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-3 (a).
4. Release the power supply cord from the rear cabinet.
5. Now, the power supply cord is free.
OVEN CAVITY
BACK PLATE
3D CHECKS.
POWER
SUPPLY CORD
2. Door hinge, support or latch hook is damaged.
3. The door 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.
Re-install
1. Insert the moulding cord stopper of power supply cord
into the square hole of the rear cabinet, referring to the
Figure C-3 (b). Installation of Power supply cord.
2. Install the earth wire lead of power supply cord to the
cavity with one (1) screw and nut and tighten the screw.
3. Connect the brown and blue wire leads of power supply
cord to the noise filter correctly, referring to the Pictorial
Diagram.
BROWN WIRE
EARTH WIRE
L
N
BLUE WIRE
F1
RED WHT
NOISE FILTER
CHASSIS SUPPORT
Figure C-3 (a) Replacement of Power Supply Cord
POWER SUPPLY
CORD
MOULDING
CORD
STOPPER
SQUARE HOLE
GROMMET
MOULDING
OVEN CAVITY
BACK PLATE
Figure C-3 (b) Replacement of Power Supply Cord
R-244M -
13
Page 14
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the switches and control
panel.
3. Remove the control panel assembly from the oven cavity
front flange. Referring to chapter "CONTROL PANEL
ASSEMBLY REMOVAL".
4. Remove the two (2) screw holding the latch hook to the
oven flange.
5. Remove the latch hook assembly from the oven flange.
6. To remove the switch.
6-1. With pushing outward on the tab that is holding the
switch, turn the switch so that the post is an axis.
6-2. Pull out the switch from the latch hook. Do not break the
post or tab of the latch hook.
6-3. Now the switch is free.
Re-install
1. Re-install each switch in its place. The monitored latch
switch is in the lower position and the monitor switch is
in the middle position. The stop switch is in the upper
position.
2. Re-connect wire leads to each switch. Refer to “Pictorial
Diagram”page 17.
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
4. Re-install the control panel assembly to the oven cavity
front flange.
5. Re-connect wire leads to the control unit. Refer to
“Pictorial Diagram”page 17.
6. Make sure that monitor switch is operating properly and
check continuity of the monitor circuit. Refer to chapter
Latch hook
SW3: Stop switch
Tab
Tab
SW2: Monitor switch
SW1: Monitored latch switch
Tab
“Test Procedure”, and Adjustment Procedure below.
Figure C-2. Latch Switch Removal
MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH
1. CARRY OUT 3D CHECKS.
If the monitored latch switch, stop switch and monitor switch
do not operate properly due to a misadjustment, the following adjustment should be made.
2. Loosen the two (2) screws holding the latch hook to the
flange of the oven front face.
3. With the 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 horizontal position of
the latch hook should be adjusted so that the monitor
switch is activated with the door closed. The vertical
position of the latch hook should be adjusted so that the
stop switch and the monitored latch switch are activated
with the door closed.
4. Secure the screws firmly.
5. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
After adjustment, make sure of the following.
1. In and out play of the door remains less than 0.5mm
when in the latched position. First check upper position
of latch hook, pushing and pulling upper portion of door
toward the oven face. Then check lower portion of the
latch hook, pushing and pulling lower portion of door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
2. The monitored latch switch and stop switch interrupt the
circuit before the door can be opened.
3. The monitor switch contacts (COM-NC) close when the
door is opened.
4. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
Door
Latch heads
Figure C-3. Latch Switch Adjustments
ADJUSTMENT
Latch hook
SW3: Stop switch
SW2: Monitor switch
SW1: Monitored latch switch
R-244M -
14
Page 15
Door film
Finger tab
Backing film
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
REMOVAL
1. Disconnect the power supply cord.
2. Open the door slightly.
3. Remove the choke cover taking care not to break clips
by inserting an iron plate (thickness of about 0.5mm) or
flat type screw driver to the gap between the choke
cover and door panel as shown Figure C-4 to free the
engaged parts.
4. Release choke cover from door panel.
5. Now choke cover is free.
Choke Cover
7
6
5
Figure C-4. Door Disassembly
6. Release two (2) pins of door panel from two (2) holes of
upper and lower oven hinges by lifting up.
7. 1. Remove door assy by removing screws (4).
8. Release door panel from tabs of door frame and remove
door frame by sliding the door panel downward.
9. Now, door panel with inner sealer film is free.
10.Tear inner sealer film from door panel.
11.Now, door panel is free.
12.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
13.Now, latch head and latch spring are free.
14.Remove Glass Stopper Screw (noting position of
stopper) and slide stopper down while lifting up.
15.Slide glass towards Glass Stopper position and
then down towards the lower edge of the door
frame.
16. Lift upper edge of glass, which will now be free from
upper clips and remove from lower clips.
17.Refitting is a reversal of the above when refitting,
ensure the glass and the glass stopper is in the
original position.
8
4
9
3
10
11
12
1
2
Putty Knife
Door Frame
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave
Measurement Procedure.)
Note: The door on a microwave oven is designed to
act as an electronic seal preventing the leakage
of microwave energy from oven cavity during
cook cycle. This function does not require that
door be air-tight, moisture (condensation)-tight
or light-tight. Therefore, occasional appearance
of moisture, light or sensing of gentle warm air
movement around oven door is not abnormal
and do not of themselves, indicate a leakage of
microwave energy from oven cavity.
Upper
Oven
Pin
Hinge
Upper Oven
Hinge
Slit Choke
Pin
Door Panel
Lower
Oven
Hinge
Lower Oven
Hinge
Choke Cover
Figure C-5. Door Replacement
RE-INSTALL
1. Re-install the outer door glass to the door frame with the
glass stopper.
2. Hold the glass stopper with the one (1) screw.
3. Re-install latch spring to the head. Re-install latch spring
to the door frame. Re-install latch head to the door
frame.
4. Re-install door panel to door frame by fitting tabs of door
frame to holes of door panel.
5. Put sealer film on door panel. Refer to “Inner Sealer
Film” and figure C-6, on how to handle the new film.
6. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
7. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that monitored latch switch, stop switch
and monitor switch are operating properly. (Refer
to chapter “Test Procedures”.).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
After any service, make sure of the following :
R-244M -
INNER SEALER FILM
NOTE: When carrying out any repair to the door,
do not bend or warp the slit choke (tabs on
the door panel assembly) to prevent
microwave leakage.
Installation
1. Tear away the backing film.
3. Put the pasted side of the inner sealer film on the door
panel.
Figure C-6. Inner Sealer Film
15
Page 16
MICROWAVE MEASUREMENT
After any repair, the microwave oven must be checked for microwave leakage to ensure continued safe operation. BS EN 603352-25 specifies that the maximum permitted leakage with a load of 275 ml is 50 W/m
2
(equivalent to 5 mW/cm
2)
at a distance of
5 cm from the oven.
PREPARATION
The following items are required to carry out this test:-
1. A low form of 600 ml beaker made from an electrically non-conductive material, such as glass or plastic, with an inside
diameter of approximately 8.5 cm. This must contain 275 ± 15 ml of water, at an initial temperature of 20 ± 2˚C.
2. A leakage detector which has been calibrated within the preceding 12 months to a standard whose accuracy can be traced
to National Physical Laboratory Standards.
Recommended instruments are:
Apollo “XI”
Celtec “A100”
Before commencing the test, check that the leakage detector is functioning and adjusted according to the manufacturer’s
instructions, and any spacers are fitted to ensure that measurement is taken 5cm from the surface of the oven.
PROCEDURE
1. Place the beaker containing the water load in the oven cavity at the centre of the turntable. The placing of this standard load
in the oven is important, not only to protect the oven, but also to ensure that any leakage it is not disguised by too large a
load absorbing energy.
2. Close the oven door, and with the power level set to FULL, turn the oven ON with the timer set for a few minutes operation.
Should the water begin to boil before the test has been completed, it should be replaced.
3. As shown in the diagram below, move the probe slowly (not faster than 2.5 cm/sec.);-
a) around the edge of the door following the gap
b) across the face of the door
c) across any vents in the oven’s sides, rear or top
Dotted line indicates the path by the leakage detector.
Whilst the maximum leakage permitted in BS60335 2-25 is 50 /W/m
2
(equivalent to 5 W/cm2),it is not normal to detect any
significant leakage, and therefore any detected leakage should be investigated.
R-244M -
16
Page 17
SCHEMATIC DIAGRAMS
50Hz
BRN
˜
230V-240v
BLU
LIVENEUTRAL
EARTH
G-Y
L
F1: FUSE
( F8A)
N
0.22µ/AC250V
NOISE FILTER
680K/ 0.5W
NOISE SUPPRESSION COIL
0.0033µ/ 250V 0.0033µ/ 250V
TC: OVEN THERMAL
CUT-OUT
10M/ 0.5W
125˚C
A3
D71D70
CONTROL UNIT
D3
B1
A5
SW3: STOP
SW1: MONITORED
COM. N.O.
RY-2
D1
N.O.
SWITCH
LATCH SWITCH
A1
RY-1
D72
B2
OL
SW2: MONITOR
Figure 0-1 Schematic-OFF Condition, Door Closed
FM
TTM
OVEN LIGHT
SWITCH
FAN MOTOR
TURNTABLE MOTOR
N.C.
COM.
N.O.
T: HIGH VOLTAGE
TRANSFORMER
WITH 150˚C THERMOSTAT
IN PRIMARY WINDING
C:
H.V. CAPACITOR
0.88µF/ AC2100V
MG: MAGNETRON
H.V. RECTIFIER
BRN
50Hz
˜
230V-240v
BLU
LIVENEUTRAL
EARTH
G-Y
L
F1: FUSE
(F8A)
N
0.22µ/AC250V
NOISE FILTER
680K/ 0.5W
NOISE SUPPRESSION COIL
0.0033µ/ 250V 0.0033µ/ 250V
TC: OVEN THERMAL
CUT-OUT
10M/ 0.5W
NOTE: PARTS WITH POTENTIALS ABOVE 250V
*
Figure 0-2 Schematic-ON Condition, Door Closed.
125˚C
A3
D71D70
CONTROL UNIT
D3
B1
A5
SW3: STOP
SW1: MONITORED
COM. N.O.
RY-2
D1
N.O.
SWITCH
LATCH SWITCH
T: HIGH VOLTAGE
TRANSFORMER
WITH 150˚C THERMOSTAT
IN PRIMARY WINDING
FM
TTM
OVEN LIGHT
SWITCH
FAN MOTOR
TURNTABLE MOTOR
N.C.
COM.
N.O.
C:
H.V. CAPACITOR
0.88µF/ AC2100V
A1
RY-1
D72
B2
OL
SW2: MONITOR
MG: MAGNETRON
H.V. RECTIFIER
R-244M -
17
Page 18
PICTORIAL DIAGRAM
RED
WHT
C:
H.V.
CAPACITOR
POWER SUPPLY CORD
RED
ORG
G/Y
NEUTRAL
LIVE
BLU
BRN
(OVEN)
TC: THERMAL CUT-OUT
L
NOISE FILTER
ORG
WHT
N
WHT
LAMP
OL: OVEN
FM:
FAN MOTOR
ORG
H.V.WIRE B
RED
MG: MAGNETRON
HIGH VOLTAGE COMPONENTS
WHT
WHT
ORG
WHT
MOTOR
TTM: TURNTABLE
H.V.
RECTIFIER
T: HIGH VOLTAGE
TRANSFORMER
WHT
RED
ORG
WHT
N.O.
SW3: STOP SWITCH
COM.
CN-A
CONTROL UNIT
ORG
1
2
RED
345
IC1
WHT
SP30
WHT
CN-B
2
12
ORG
1
CN-B
ORG
RY2
5
1
RED
WHT
ORG
CN-A
WHT
ORG
RY1
RED
N.C.
SW2: MONITOR
COM.
SWITCH
N.O.
RED
WHT
WHT
COM.
SW1: MONITORED
Figure S-1. Pictorial Diagram
.
LATCH SWITCH
NOTE: Most of the terminals are Positive Lock (No-Case type)
R-244M -
18
Page 19
C1
C2
C3
S6
S7
S8
S9
S10
S11
S12
S5
S4
S3
S2
S1
LIQUID CRYSTAL DISPLAY
CONTROL PANEL CIRCUIT DIAGRAM
R50 10kF
RW 100k
C44
33pF(CH)
C50
1
SEG0
2
SEG1
3
SEG2
4
SEG3
5
SEG4
6
SEG5
7
SEG6
8
SEG7
9
SEG8
10
SEG9
11
SEG10
12
SEG11
13
R60
14
R61
15
R62
16
R63
17
AIN0
18
AIN1
19
AIN2
20
AIN3
(J6)(J7)
(J4)(J5)
IC1
IXA085DR
VDD 42
COM4 41
COM3 40
COM2 39
COM1 38
VLC 37
HOLD 36
RESET 35
XOUT 34
XIN 33
R92 32
R91 31
R90 30
R83 29
INT1 28
R81 27
INT2 26
R73 25
R72 24
R71 23
22 21
R70 VSS
CN - C
2
6
CN-C
1
CN-C
R10 27k R11 27k
CN-C5CN-C4CN-C3CN-C
: IF NOT SPECIFIED 1/4W ± 5%
: IF NOT SPECIFIED 1SS270A
: IF NOT SPECIFIED 0.01µF/16V
R5
NOTE :
R2 R3 R4
R1
D1
/50v
0.1µ
C10
10k
R12
1N4005E
D2
R1-5
1k x 5 2w
1N4005E
(J2)(J3)
(JSW2)
D10
R40
1.5k
1/2w
SLP-7117E
LED1-3
LED1 LED2 LED3
–
+
10G471K
VRS1
R64 100k
–
+
ZD1 HZ12C1
C1 220µ/16v
+
R41 1k
+
R30 3.3k
C21 10µ/35v
–
JW1
C43
C42 0.1µ/50v
Q40 2SA1267Y
C41 47µ/16v
–
Q30
SP30
Q20
KRA
101M
HZ12C1 HZ12C1
ZD21 ZD20
C20 220µ/35v
C40 0.1µ/50v
R42 15k
ZD40 HZ4C3
KRC
101M
Q21
KRC
D20
8.2k
R20
C22 0.1µ/50v
105M
R31 15k
15k
R80
C80
4.7k
R81
8.2k
R72
+
+
D74
Q70
KRC105M
R73 15k
C71 100µ/35v
–
C70 47µ/35v
–
ZD71 ZD70
R71 360 1w
R70 360 1w
D73
D80
D72
ZD70-71
HZ7C2
CN - B
B 1 B 2
DOOR SWITCH
Figure S-2. Control Panel Circuit
d
ab
c
R-244M -
19
CN - A
RY1
A 1
OVEN LAMP
FAN MOTOR
TURNTABLE
MOTOR
D3
1N4005E
AC(N)
FM
A 5
D70
A 3
FM
D71
D70-71
1N4005E
RY2
COM
AC(L)
NO
HIGH
VOLTAGE
TRANSFORMER
Page 20
START
AUTO MINUTE
POWER
WEIGHT
STOP
CLEAR
SWITCH UNIT CIRCUIT DIAGRAM
CN - C
1
SW1
2
SW2
3
SW3
4
min.
10
min.
1
DEFROST
sec.
10
COOK
SW4
5
SW5
SW6
SW7
SW8
6
CN - C
6Pin HARNESS
Figure S-3. Switch Unit Circuit
R-244M -
20
Page 21
PRINTED WIRING BOARD 0F CONTOL PANEL DIAGRAM
WARNING:
TRANSLESS
(SW1)
16
CN - C
(SW2) (SW3)
JW1
,F
(WH-1)
(JSW2)
RW
(SW4)
(SW5)
DIP
R80
41
C71
R81
C70
LED1 LED2 LED3
1
R41
E
Q40
1
C42
C50
(C61)
C10
C40
JW1
R43
(R60)
(R61)
(R62)
(R63)
Q21
C21
B
R40
R20
R72
E
ZD71
C22
R70
2242
C41
C20
4
B
Q20
E
R71
1
IC1
21
D80
(J6)
(J4)
(J2)
(J3)
(J7)
C80
(R64)
ZD21
CN - B
2
D72
(J5)
(R65)
ZD20
E
Q70
2
C43
3
5
B
6
D74
C44
B
R42
R50
(CF1)
R31
(C60)
E
D10
R2
Q30
ZD40
R12
ZD70
R30
SP30
R11
R4
ZD1
B
C1
D2
WARNING:
R10
R5
AC LINE VOLTAGE IS SUPPLIED TO ALL PARTS
R3
R1
(WH-1)
R73
D73
(SW60)
D71
D20
A
RY2
B
C
RY1
CN - A
(SW6) (SW7)
4 1
Figure S-3. Printed Wiring Board of Control unit
R-244M -
21
(J1)
VRS1
51
D70
D3
Page 22
PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM
SW8
WHITE(EH)
CN - G
6
CN - C
1
SW6
6
GREEN(KR)
1
SW4 SW5 SW7
SW2 SW3 SW1
Figure S-5. Printed Wiring Board of Switch Unit
R-244M -
22
Page 23
PARTS LIST
Note: The parts marked “*” are used in voltage more than 250V. The parts marked ∆ may cause undue microwave exposure
“§” MARK: SPARE PARTS-DELIVERY SECTION
REF NO. PART NO. § DESCRIPTION Q'TY CODE
ELECTRIC PARTS
1-1 RH-DZA048WRE0 U H.V. rectifier assembly 1 AM
1-2 RC-QZA297WRZZ U High voltage capacitor 1 AN
1-3 QSW-MA146WRZZ U Monitor switch 1 AC
1-4 QSW-MA147WRZZ U Monitored latch switch 1 AC
1-5 QSW-MA147WRZZ U Stop switch 1 AC
1-6 FPWBFA308WRE2 U Noise filter 1 AQ
1-7 QFS-CA025WRE0 U Fuse F8A 1 AC
1-11 RTHM-A122WRZZ U Thermal cut-out 125°C (Oven) 1 AG
1-13 QACCBA030WRE4 U Power supply cord 1 AK
1-14 RMOTEA003URE0 U Fan motor 1 AQ
1-15 RV-MZA264WRE0 U Magnetron 1 BK
1-16 RLMPTA066WRE0 U Oven lamp 1 AK
1-17 RMOTDA226WRE0 J Turntable motor 1 AQ
1-18 RTRN-A015URE1 U High voltage transformer 1 BE
CABINET PARTS
2-1 GCABUA003URP0 U Outer case cabinet (G) 1 AT
2-1 GCABUA573WRT0 U Outer case cabinet (W) 1 AT
2-1 GCABUA001URP0 U Outer case cabinet (B) 1 AT
2-1 GCABUA027URP0 U Outer case cabinet (SL) 1 AT
2-2 GLEGPA057WRE0 U Foot 2 AB
*
*
*∆
*
∆
∆
∆
∆
CONTROL PANEL PARTS
3- 1 DPWBFC142WRKZ U Control unit 1 BB
3- 1A QCNCMA430DRE0 U 3-pin connector (CN-A) 1 AC
3- 1B QCNCMA414DRE0 U 2-pin connector (CN-B) 1 AB
3- 1C QCNCMA330DRE0 U 6-pin connector (CN-C) 1 AB
3- 1D RLCDSA036DRE0 U Liquid crystal display 1 AP
3- 1E LHLD-A179WRF0 U LED holder 1 AE
3- 1F PSHEPA601WRE0 U LED sheet 1 AD
C1 VCEAB31CW227M U Capacitor 220 uF 16V 1 AA
C10 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB
C20 VCEAB31VW227M U Capacitor 220 uF 35V 1 AA
C21 VCEAB31VW106M U Capacitor 10 uF 35V 1 AB
C22 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB
C40 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB
C41 VCEAB31CW476M U Capacitor 47 uF 16V 1 AA
C42 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB
C43-44 VCKYD11CY103N U Capacitor 0.01 uF 16V 2 AA
C50 VCCCF61HH330J U Capacitor 33 pF 50V 1 AA
C70 VCEAB31VW476M U Capacitor 47 uF 35V 1 AA
C71 VCEAB31VW107M U Capacitor 100 uF 35V 1 AB
C80 VCKYD11CY103N U Capacitor 0.01 uF 16V 1 AA
D1-3 VHD1N4005E61B U Diode (1N4005E) 3 AA
D10 VHD1SS270A/-1 U Diode (1SS270ATA) 1 AA
D20 VHD1SS270A/-1 U Diode (1SS270ATA) 1 AA
D70-71 VHD1N4005E61B U Diode (1N4005E) 2 AA
D72-74 VHD1SS270A/-1 U Diode (1SS270ATA) 3 AA
D80 VHD1SS270A/-1 U Diode (1SS270ATA) 1 AA
IC1 RH-IXA085DRZZ U LSI 1 AZ
JW1 FW-VZA259DRZZ U 1-pin harness 1 AE
LED1-3 VHPSLP7117E-3 U Light emitting diode 3 AC
Q20 VSKRA101M//-3 U Transistor (KRA101M) 1 AA
Q21 VSKRC105M//-3 U Transistor (KRC105M) 1 AB
Q30 VSKRC101M//-3 U Transistor (KRC101M) 1 AB
Q40 VS2SA1267Y/-3 U Transistor (2SA1267Y) 1 AB
Q70 VSKRC105M//-3 U Transistor (KRC105M) 1 AB
R1-5 VRS-L63DA102J U Resistor 1.0k ohm 2W 5 AB
R10-11 VRD-B12EF273J U Resistor 27k ohm 1/4W 2 AA
R12 VRD-B12EF103J U Resistor 10k ohm 1/4W 1 AA
R20 VRD-B12EF822J U Resistor 8.2k ohm 1/4W 1 AA
R30 VRD-B12EF332J U Resistor 3.3k ohm 1/4W 1 AA
R-244M -
23
Page 24
PARTS LIST
Note: The parts marked ”*” are used in voltage more than 250V. The parts marked ∆ may cause undue microwave exposure
“§” MARK: SPARE PARTS-DELIVERY SECTION
REF NO. PART NO. § DESCRIPTION Q'TY CODE
CONTROL PANEL PARTS (CONTINUED)
R31 VRD-B12EF153J U Resistor 15k ohm 1/4W 1 AA
R40 VRD-B12HF152J U Resistor 1.5k ohm 1/2W 1 AA
R41 VRD-B12EF102J U Resistor 1.0k ohm 1/4W 1 AA
R42 VRD-B12EF153J U Resistor 15k ohm 1/4W 1 AA
R50 VRN-B12EK103F U Resistor 10k ohm 1/4W 1 AA
R64 VRD-B12EF104J U Resistor 100k ohm 1/4W 1 AA
R70-71 VRS-B13AA361J U Resistor 360 ohm 1W 2 AA
R72 VRD-B12EF822J U Resistor 8.2k ohm 1/4W 1 AA
R73 VRD-B12EF153J U Resistor 15k ohm 1/4W 1 AA
R80 VRD-B12EF153J U Resistor 15k ohm 1/4W 1 AA
R81 VRD-B12EF472J U Resistor 4.7k ohm 1/4W 1 AA
RW VRD-B12EF104J U Resistor 100k ohm 1/4W 1 AA
RY1 RRLY-A080DRE0 U Relay (OJ-SH-124LM) 1 AG
RY2 RRLY-A105DRE0 U Relay (OMIF-S-112LM) 1 AG
SP30 RALM-A014DRE0 U Buzzer (PKM22EPT-THAI) 1 AG
VRS1 RH-VZA032DRE0 U Varistor (10G471K) 1 AC
ZD1 VHEHZ12C1//-1 U Zener diode (HZ12C1) 1 AA
ZD20-21 VHEHZ12C1//-1 U Zener diode (HZ12C1) 2 AA
ZD40 VHEHZ4C3///-1 U Zener diode (HZ4C-3) 1 AA
ZD70-71 VHEHZ7C2///-1 U Zener diode (HZ7C2) 2 AA
3- 2 FPWBFA058URK0 U Switch unit assembly 1 AW
3- 2-1 FW-VZA262DRZZ U 6-pin harness (CN-C) 1 AE
3- 2-2 QSW-PA016DRE0 U Tact switch (SW1-8) 8 AB
3- 3 HPNLCB034URR0 U Control panel frame [R-244(B)M] 1 AK
3- 3 HPNLCG024URR0 U Control panel frame [R-244(G)M] 1 AK
3- 3 HPNLCS030URR0 U Control panel frame [R-244(SL)M] 1 AV
3- 3 HPNLCW071URR0 U Control panel frame [R-244(W)M] 1 AK
3- 4 GCOVHA032URF0 U Key fixing frame 1 AF
3- 5 GMADIA006URF0 U Display window 1 AF
3- 6 PSHEPA045URE0 U Key sheet [R-244(W)M] 1 AM
3- 6 PSHEPA046URE0 U Key sheet [R-244(G)M] 1 AM
3- 6 PSHEPA047URE0 U Key sheet [R-244(B)M] 1 AM
3- 6 PSHEPA048URE0 U Key sheet [R-244(SL)M] 1 AM
3- 7 XEPSD30P10XS0 U Screw; 3mm x 10mm 7 AA
OVEN PARTS
4-1 DOVN-A013URT1 U Oven cavity 1 BA
4-2 GDAI-A280WRP1 U Base plate 1 AQ
4-3 LBNDKA111WRP0 U H.V.Capacitor holder 1 AD
4-4 PHOK-A001URF1 U Latch hook 1 AH
4-6 PDUC-A638WRF2 U Fan duct 1 AE
4-7 NFANJA029WRE0 U Fan blade 1 AM
4-8 LANGFA169WRP6 U Chassis support 1 AE
4-9 PPACGA002URE0 U Packing seal 1 AB
4-10 PCOVPA309WRE0 U Waveguide cover 1 AC
4-11 PDUC-A581WRF3 U Air intake duct 1 AE
4-12 PCUSGA308WRP0 U HVT cushion Not on BOM 2 AA
4-13 PSPAGA001WRE0 U Vibration Proof Cushion 1 AA
R-244M -
24
Page 25
PARTS LIST
Note: The parts marked “*” are used in voltage more than 250V. The parts marked ∆ may cause undue microwave exposure
“§” MARK: SPARE PARTS-DELIVERY SECTION
REF NO. PART NO. § DESCRIPTION Q'TY CODE
DOOR PARTS
5 CDORFG014URK0 U Door assembly (G) 1 BD ∆
5 CDORFW012URK0 U Door assembly (W) 1 BD ∆
5 CDORFB006URK0 U Door assembly (B) 1 BD ∆
5 CDORFS005URK0 U Door assembly (SL) 1 BD ∆
5-1 FDORFA299WRT1 U Door panel assembly 1 AU
5-2 GCOVHA366WRF0 U Choke cover 1 AG ∆
5-3 GWAKPG006URF0 U Door frame (G) 1 AT
5-3 GWAKPW023URF0 U Door frame (W) 1 AT
5-3 GWAKPB013URF0 U Door frame (B) 1 AT
5-3 GWAKPS016URRO U Door frame (SL) 1 AT
5-4 PGLSPA003URE0 U Outer door glass 1 AL
5-5 LSTPPA013URF0 U Latch head 1 AD
5-6 MSPRTA141WRE0 U Latch spring 1 AA
5-7 PSHEPA482WRE0 U Inner Sealer film 1 AH
5-8 LSTPPA012URF1 U Glass stopper 1 AB
5-9 XEBSD30P06000 U Door Frame screw 3mm x 6mm 5 AA
SCREW, NUT AND WASHER
7-1 LX-CZA001URE0 J Screw 4mm x 12mm 18 AA
7-2 XHTSD40P08RV0 J Screw 4mm x 8mm 4 AA
7-3 XHPSD40P08K00 J Noise unit screw 1 AA
7-4 XJPSD40P10X00 U Screw self tapping 1 AA
7-6 LX-NZA026WRE0 J Nut M4 nyloc 1 AA
7-7 XFPSD40P06000 J TTM screw/chassis support to magnetron 2 AA
7-10 XOTSE40P10000 J O/Wrap screw (W)/(SL) 2 AA
7-10 XOTSF40P10000 J O/Wrap screw (G/B) 2 AA
7-12 LX-CZA001URE0 J TTM cover screw (not shown in illustration) 1 A A
7-14 PCLI-A001URE0 U Harness clip 1 AA
7-15 LX-LZA002URE0 U Rivet 1 AA
MISCELLANEOUS
6-1 FROLPA070WRK3 U Roller stay 1 AM
6-2 NTNT-A060WRE0 J Turntable 1 AN
6-3 TINS-A252URR0 U Operation Manual/Cookery book 1 AM
6-4 QW-QZA5001URE0 U H.V. wire B 1 AE *
6-5 FW-VZA059URE3 U Main wire harness 1 AN
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
R-244M -
25
Page 26
EXPLODED DIAGRAM OF OVEN
7-1
2-1
7-1
4-10
4-11
4-1
7-15
4-9
7-7
1-16
1-17
4-2
7-10
1-11
7-1 7-1
7-6
7-4
4-4
1-18
7-1
7-2
1-15
4-12
1-5
1-3
7-2
1-4
1-13
7-1
1-1
4-3
4-6
6-2
4-7
7-10
1-6
4-8
7-1
7-1
7-2
1-14
1-7
7-3
7-14
7-7
7-1
2-2
7-1
7-1
2-2
7-1
7-1
x4
NOTE: In the event of removing the turntable motor cover
this part should be refitted using screw connection:
LX-CZA030WRE0
R-244M -
1-2
x2
4-13
6-1
26
Page 27
CONTROL PANEL PARTS
3 - 6
3 - 3
CONTROL PANEL / DOOR PARTS
3 - 1
3-1E
3 - 5
3 - 4
3-1F
3-1D
3 - 7
3 - 7
3 - 2
DOOR PARTS
5-3
5-4
5-1
3 - 7
5
5-2
5-9
5-9
5-7
5-9
5-9
5-8
R-244M -
5-9
5-5
5-6
27
Page 28
MISCELLANEOUS
PACKING & ACCESSORIES
6-4
6-5
Actual wire harness may be different from illustration.
COPYRIGHT C 2001 BY SHARP CORPORATION
ALL RIGHT RESERVED.
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
PACKING AND ACCESSORIES
DOOR PROTECTION SHEET
ROLLER STAY
TURNTABLE TRAY
PRINTED MATTER
NCA
INTO THE OVE
SPADPA531WRE0
AGONALL
VITY (DI
TOP PAD
FPADBA010URK0
OVEN BAG
SSAKHA047WRE0
)
Y
BOTTOM PAD
FPADBA009URK0
ACCESSORY HOLDER
SPADPA014URE0
Not replaceable items.
R-244M -
28
PACKING CASE
R-244(W/G/B/SL)M: SPAKCA427URR0
SHARP COPORATION
2001Printed in U.K.
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