SERVICE MANUAL
S0601R963EW//
MICROWAVE OVEN WITH
GRILL AND CONVECTION
Jet Convection &
10 min
Grill
1 min.
10sec.
COOK
ROAST
BEEF / LAMB
ROAST PORK
ROAST POULTRY
DEFROST
CHICKEN
PORTIONS
STEAK / CHOPS
CHILLED
READY MEALS
MINCED MEAT
FRESH
READY MEALS
FRESH FISH
CANNED FOOD
RICE / PASTA
FRESH VEG.
1 Oven Ready
2 Crispy CrumbPizza
Foods
3 Baked Potatoes
4 Oven Chips
5 Yorkshire
Pudding
6 Cake
Kg.Lb.Pc
s
DOWN
UP
MICRO.
POWER
KITCHE
N
TIMER
STOP
CLEAR
AUTO
COOK
Time
LESS
GRILL
CONV.
( ˚C )
Kg/Lb
MORE
DUAL
CONV./
GRILL
AUTO START
CLOCK
START
AUTO MINUTE
900W
R-963
nfo
MODELS
R-953(SL)M
R-953(W)M
R-963(SL)M
R-963(W)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 ...................................................................................................................... INSIDE COVER
CAUTION, MICROWAVE RADIATION .................................................................................................... 1
WARNING ................................................................................................................................................. 1
PRODUCT SPECIFICATIONS ................................................................................................................. 2
GENERAL INFORMATION ....................................................................................................................... 2
APPEARANCE VIEW .............................................................................................................................. 3
OPERATION SEQUENCE ........................................................................................................................ 4
FUNCTION OF IMPORTANT COMPONENTS ....................................................................................... 8
TROUBLESHOOTING GUIDE ............................................................................................................... 11
TEST PROCEDURE .............................................................................................................................. 12
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................. 19
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE .................................................. 25
MICROWAVE MEASUREMENT ........................................................................................................... 31
SCHEMATIC DIAGRAMS ...................................................................................................................... 32
PICTORIAL DIAGRAM .......................................................................................................................... 36
POWER UNIT CIRCUIT ......................................................................................................................... 37
CPU UNIT CIRCUIT ............................................................................................................................... 38
INDICATOR CIRCUIT ............................................................................................................................. 40
KEY UNIT CIRCUIT ................................................................................................................................ 41
PRINTED WIRING BOARD .................................................................................................................... 43
PARTS LIST .......................................................................................................................................... 44
EXPLODED DIAGRAM OF OVEN ......................................................................................................... 47
CONTROL PANEL/DOOR PARTS ......................................................................................................... 48
MISCELLANEOUS/PACKING & ACCESSORIES .................................................................................. 49
SHARP CORPORATION
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 assembly, High voltage harness.
REMEMBER TO CHECK 3D
REMEMBER TO CHECK 4R
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
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.
WARNING: AGAINST THE CHARGE OF THE HIGHVOLTAGE 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 highvoltage capacitor (that is, of the connecting lead of the highvoltage rectifier) against the chassis with the use of an
insulated screwdriver.
Sharp recommend that wherever possible fault-finding is
carried out with the supply disconnected. It may in, some
cases, be necessary to connect the supply after the outer
case has been removed, in this event carry out 3D checks and
then disconnect the leads to the primary of the High voltage
transformer. Ensure that these leads remain isolated from
other components and the oven chassis. (Use insulation tape
if necessary.) When the testing is completed carry out 3D
checks and reconnect the leads to the primary of the High
voltage transformer.
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 3D checks and re-examine the connections to the component being tested.
When all service work is completed, and the oven is fully
assembled, the microwave power output should be checked and
a microwave leakage test should be carried out.
SERVICE MANUAL
MICROWAVE OVEN WITH
GRILL AND CONVECTION
PRODUCT SPECIFICATIONS
R-953(SL)M/ R-953(W)M/ R-963(SL)M/ R-963(W)M
GENERAL IMPORTANT INFORMATION
GENERAL INFORMATION
This Manual has been prepared to provide Sharp Corp. Service
engineers with Operation and Service Information.
It is recommended that service engineers carefully study the entire text
of this manual, so they will be qualified to render satisfactory customer
service.
APPEARANCE VIEW
OPERATING SEQUENCE
WARNING
MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy
which may radiate from the magnetron or other microwave
generating devices if it is improperly used or connected. 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.
WARNING
FUNCTION OF IMPORTANT
COMPONENTS
TROUBLESHOOTING GUIDE
AND TEST PROCEDURE
TOUCH CONTROL PANEL
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
Servicing and repair work must be carried out only by trained
service engineers.
MICROWAVE MEASUREMENT
All the parts marked “*” on parts list are used at voltages more than
250V.
WIRING DIAGRAM
Removal of the outer wrap gives access to potentials above 250V.
All the parts marked “∆” on parts list may cause undue microwave
exposure, by themselves, or when they are damaged, loosened or
removed.
Never operate the Grill and/ or Convection heater with the
oven outer cabinet removed. (Because air flow is eliminated, and
the excess heat generated on adjacent components). It can cause
permanent damage or a fire.
SHARP CORPORATION
OSAKA, JAPAN
R-953/963M - 1
PARTS LIST
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
230 - 240 Volts / 50 Hertz / Single phase, 3 wire earthed
Power Consumption
Microwave cooking 1.55 kW Approx. 6.7 A
Convection cooking 2.85 kW Approx. 11.9 A
Grill cooking
2.85 kW Approx. 11.9 A
Micro and Grill ...................... 2.95 kW
Approx. 12.6 A
Dual cooking
Micro and Convection ........... 2.95 kW
Approx. 12.6 A
900 W nominal of RF microwave energy (measured by method of IEC 60705)
Operating fequency 2450 MHz
1400 W
1400 W
Width 550 mm
Height 368 mm (including foot)
Depth 537 mm
Width 375 mm
Height 272 mm
Depth 395 mm
362mm
Touch Control System
Clock (1:00 - 12:59) / Timer (0 - 99 minutes 90 sec.)
Microwave Power for Variable Cooking
Repetition Rate;
100 % (HIGH) .................... Full power throughout the cooking time
70 % (MEDIUM HIGH) ................... approx. 70% of FULL Power
50 % (MEDIUM) ............................. approx. 50% of FULL Power
30 % (MEDIUM LOW) .................... approx. 30% of FULL Power
10 % (LOW) ................................... approx. 10% of FULL Power
Convection temperature control range:
250˚C, 230˚C, 220˚C, 200˚C, 180˚C, 160˚C, 130˚C, 100˚C, 70˚C and 40˚C
Power Output
Grill heating element Power Output
Convection heating element Power Output
Case Dimensions
Cooking Cavity Dimensions
Turntable diameter
Control Complement
Set Weight
TIME keys, EXPRESS COOK keys, EXPRESS DEFROST keys
SENS' N' COOK key (R-963M only), AUTO COOK key
LESS/MORE keys, CONVECTION key, DUAL CONVECTION/GRILL key
WEIGHT CONVERSION key, AUTO START/CLOCK key
START/AUTO MINUTE key, INFO key, STOP/CLEAR key,
KITCHEN TIMER key, MICROWAVE POWER LEVEL key
GRILL key, WEIGHT keys
Approx. 29 kg
As part of our policy of continuous improvement, we reserve
the right to alter design and specifications without notice
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED
IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW
BLUE
BROWN
: EARTH
: NEUTRAL
: LIVE
R-953/963M - 2
APPEARANCE VIEW
4
1
2
11
10
OVEN
12
1. Grill heating element
2. Oven lamp
3. Control panel
4. Shelf runners
9
5. Waveguide cover
8
7
6. Oven cavity
7. Coupling
8. Door seals and sealing surfaces
9. Door opening handle
10.Air-vent openings
11.Outer cabinet
15.Low Rack
12.Power cord
16.High Rack
13.Turntable
17.Square shelves (x2)
14.Turntable support
Note for R-963M: When is highlighted in the display, press the
INFO key to read a specific hint
which may assist you.
COOK indicator
GRILL indicator
CONVECTION indicator
MICROWAVE indicator
INFO indicator (R-963M only)
1
16
17
15
14
Jet Convection & Grill
2
3
COOK
1
2
3
4
5
COOK
4
10 min
6.
7.
8.
9.
NOTE:
The directed features are disabled after three minutes when
the oven is not in use. These
features are automatically enabled when the door is opened
and closed or the STOP/
CLEAR pad is pressed.
13
Jet Convection & Grill
CONTROL PANEL:
TIME keys
EXPRESS COOK key
EXPRESS DEFROST key
SENS' N' COOK key (R-963M
only) See NOTE.
10. AUTO COOK key
11. LESS/MORE keys
Press to shorten or lengthen cooking/ defrosting time.
12. CONVECTION key
13. DUAL CONVECTION/GRILL
key
14. WEIGHT CONVERSION key
15. AUTO START/CLOCK key
16. START/AUTO MINUTE key (See
NOTE.)
17. INFO key (R-963M only)
18. STOP/CLEAR key
19. KITCHEN TIMER key
20. MICROWAVE POWER LEVEL
key
21. GRILL key
22. WEIGHT keys
6 5
CONTROL PANEL
DIGITAL DISPLAY:
1.
2.
3.
4.
5.
3
1 min.
6
10 min
10sec.
1 min.
10sec.
COOK
6
7
COOK
7
ROAST
BEEF / LAMB
ROAST PORK
ROAST POULTRY
DEFROST
ROAST
BEEF / LAMB
ROAST PORK
8
ROAST POULTRY
DEFROST
CHICKEN
PORTIONS
STEAK / CHOPS
MINCED MEAT
CHILLED
READY MEALS
FRESH
READY MEALS
CANNED FOOD
FRESH FISH
RICE / PASTA
FRESH VEG.
8
CHICKEN
PORTIONS
1
2
3
4
5
6
7
8
22
MINCED MEAT
STEAK / CHOPS
Chilled Ready Meals
Frozen Ready Meals
Crispy Crumb Foods
Oven Ready Pizza
Oven Chips
Baked Potatoes
Rice / Pasta
Cake
AUTO
COOK
Kg.Lb.Pcs
Time
21
20
DOWN
UP
LESS
MORE
MICRO.
POWER
GRILL
CONV.
( ˚C )
DUAL
CONV./
GRILL
19
KITCHEN
TIMER
18
Kg/Lb
AUTO START
CLOCK
STOP
START
CLEAR
AUTO MINUTE
10
11 22
12 21
13
14 20
15 19
1 Oven Ready Pizza
2 Crispy Crumb Foods
3 Baked Potatoes
4 Oven Chips
5 Yorkshire Pudding
6 Cake
Kg.Lb.Pcs
LESS
MORE
MICRO.
POWER
GRILL
CONV.
( ˚C )
DUAL
CONV./
GRILL
KITCHEN
TIMER
16 18
R-963
Kg/Lb
10
11
Time
UP
AUTO START
CLOCK
STOP
START
CLEAR
AUTO MINUTE
900W
R-953/963M - 3
AUTO
COOK
DOWN
900W
R-953
9
nfo
12
13
14
15
16
17
OPERATION SEQUENCE
OFF CONDITION
Closing the door activates the monitored latch switch and
the stop switch.
IMPORTANT:
When the oven door is closed, the contacts COM-NC
of the monitor switch must be open. When the microwave oven is plugged in a wall outlet (230 - 240V /
50Hz), the line voltage is supplied to the noise filter.
Figure O-1 on page 32
1. The control unit is not energized. The display shows
nothing (Fig. O-1 (a)).
2. Open the door. The contacts (COM-NC) of the monitored latch switch are closed and the control unit is
energized. Then contacts of relays RY1 and RY5 are
closed, and the oven lamp will light and the display will
show "ENERGY SAVE MODE" (Fig. O-1(b)).
3. Close the door. The contacts (COM-NC) of the monitored latch switch are opened and the contacts of relay
RY1 are opened and the oven lamp will be turned off.
The display will show " . 0". (Fig. O-1(c)).
NOTE: Energy save mode
1. If the oven has not been used for more than 3 minutes,
the contacts of the relay RY5 will be opened and the
control unit will be not energized. Open and close the
door, the control unit will resume.
2. If the clock is set, this energy save mode does not work.
3. If the display shows different messages from ENERGY
SAVE MODE, the oven may be set in demo mode.
Close the door, see operation manual to cancel demo
mode.
MICROWAVE COOKING CONDITION
HIGH COOKING
Enter a desired cooking time by touching the TIME keys
and start the oven by touching START key.
Function sequence Figure O-2 on page 33
CONNECTED COMPONENTS
Oven lamp, Turntable motor
High voltage transformer
Fan motor
RELAY
RY1
RY2
RY6
1. The line voltage is supplied to the primary winding of
the high voltage transformer. The voltage is converted
to about 3.3 volts A.C. output on the filament winding
and high voltage of approximately 2000 volts A.C. on
the secondary winding.
2. The filament winding voltage (3.3 volts) heats the
magnetron filament and the high voltage (2000 volts) is
sent to the voltage doubling circuit, where it is doubled
to negative voltage of approximately 4000 volts D.C..
3. The 2450 MHz microwave energy produced in the
magnetron generates a wavelength of 12.24 cm. This
energy is channelled through the waveguide (transport
channel) into the oven cavity, where the food is placed
to be cooked.
4. When the cooking time is up, a signal tone is heard and
the relays RY1 + RY2 + RY6 go back to their home
position. The circuits to the oven lamp, high voltage
transformer, fan motor and turntable motor are cut off.
5. When the oven door is opened during a cooking cycle,
the switches come to the following condition.
Switch
Contact
Monitored latch switch
Stop switch
Monitor Switch
COM-NO
COM-NC
COM-NO
COM-NO
COM-NC
Condition
During
Oven Door
Cooking Open(No cooking)
Closed
Opened
Opened Closed
Closed
Opened
Closed
Opened
Opened Closed
The circuit to the high voltage transformer is cut off when
the contacts of relay RY2, and the contacts (COM-NO) of
the monitored latch switch and monitor switch are made
open. The circuit to the fan motor is cut off when the relay
RY6 is made open. The circuit to the turntable motor is cut
off when the contacts (COM-NO) of the monitored latch
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 remaining time.
6. MONITOR SWITCH CIRCUIT
The monitor switch is mechanically controlled by the
oven door, and monitors the operation of the monitored latch switch.
6-1. When the oven door is opened during or after the
cycle of a cooking program, the monitored latch
switch and stop switch must open their contacts
(COM-NO) first. And the contacts (COM-NC) of the
monitored latch switch are made closed. After that the
contacts (COM-NC) of the monitor switch can be
closed and the contacts (COM-NO) of monitor switch
are made open.
6-2. When the oven door is closed, the contacts (COMNC) of the monitor switch SW3 must be opened and
the contacts (COM-NO) of monitor switch must be
closed. After that the contacts (COM-NO) of the
monitored latch switch and the stop switch are made
closed. And the contacts (COM-NC) of the monitored
latch switch are made open.
6-3. When the oven door is opened and the contacts
(COM-NO) of the monitored latch switch remain
closed, the fuse F8A will blow. Because the relay RY1
and monitor switch are closed and a short circuit is
caused.
MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the high voltage
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.
32 sec. ON
100%
100% (HIGH)
70%(MEDIUM
HIGH)
24 sec. ON
8 sec. OFF
18 sec. ON
14 sec. OFF
12 sec. ON
20 sec. OFF
6 sec. ON
26 sec. OFF
Approx. 70%
50%(MEDIUM)
30% (MEDIUM
LOW)
10%(LOW)
R-953/963M - 4
Approx. 50%
Approx. 30%
Approx. 10%
OPERATION SEQUENCE
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.
GRILL COOKING CONDITION
TOP GRILL (Figure O-3a)
In this condition the food is cooked by the grill heating
element . Programme the desired cooking time by touching the TIME keys and touch the GRILL key once. When
the START key is touched, the following operations occur:
1. The numbers on the digital read-out start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY3 is energized and the main supply
voltage is applied to the top grill heating elements.
4. Now, the food is cooked by the top grill heating elements.
NOTE: The convection cooking condition will be curried
out simultaneously until the temperature of the
oven cavity rise to 220˚C.
2. The relay RY4 and RY3 are energized and the main
supply voltage is applied to the convection heating
element and the grill heating element.
3. The oven will continue to turned the convection heating
element on and off to maintain the temperature for the
programmed cooking time. And simultaneously the
grill heating elements will be operated at 10% power
output.
CONVECTION COOKING (by 40˚C _ 230˚C)
Programme the cooking time by touching TIME keys. And
then programme the desired convection temperature of
40˚C 230˚C by touching CONVECTION key. When the
START key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 is energized and the main supply
voltage is applied to the convection heating element.
3. The oven will continue to turned the convection heating
element on and off to maintain the temperature for the
programmed cooking time.
DUAL COOKING CONDITION
CONVECTION COOKING CONDITION (Figure O-4)
PRE-HEATING (by 40˚C - 130˚C)
Programme the desired convection temperature of 40˚C
- 130˚C by touching CONVECTION key. When the START
key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 is energized and the main supply
voltage is applied to the convection heating element.
3. After the temperature of oven cavity rises to the selected one, the oven will continue to turned the
convection heating element on and off to maintain the
temperature for 30 minutes.
PRE-HEATING (by 160˚C _ 250˚C)
Programme the desired convection temperature of 160˚C
- 250˚C by touching CONVECTION key. When the START
key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 and RY3 are is energized and the main
supply voltage is applied to the convection heating
element and the grill heating elements.
3. After the temperature of oven cavity rises to the selected one, the oven will continue to turned the
convection heating element on and off to maintain the
temperature for 30 minutes. And simultaneously the
grill heating element will be operated at 10% power
output.
CONVECTION COOKING (by 250˚C)
Programme the cooking time by touching TIME keys. And
then programme the convection temperature of 250˚C by
touching CONVECTION key. When the START key is
touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
MICROWAVE AND CONVECTION (Figure O-5a)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL CONV./GRILL key once.
Select the microwave power level by touching the MICROWAVE POWER LEVEL key. And select the convection
temperature by touching the CONVECTION key.
NOTE: The 100% microwave power level can not be
selected.
When the START key is touched, the following operations
occur:
1. The numbers on the digital read-out start the count
down to zero.
2. The oven lamp, fan motor, turntable motor and convection motor are energized.
3. The relay RY4 will be energized and the main supply
voltage is applied to the convection heating element.
4. The relay RY2 is energized and the microwave energy
is generated by magnetron.
5. Now, the food is cooked by microwave and convection
energy simultaneously.
MICROWAVE AND TOP GRILL (Figure O-5b)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL CONV./GRILL key twice.
Select the microwave power level by touching the MICROWAVE POWER LEVEL key. When the START key is
touched, the following operations occur:
1. The numbers on the digital read-out start the count
down to zero.
2. The oven lamp, fan motor and turntable motor are
energized.
3. The relay RY3 is energized and the main supply
voltage is applied to the grill heating elements.
4. The relay RY2 is energized and the microwave energy
is generated by magnetron.
5. Now, the food is cooked by microwave and grill simultaneously.
R-953/963M - 5
OPERATION SEQUENCE
ON/OFF TIME RATIO
In grill cooking, convection cooking or dual cooking, the
grill heating elements or magnetron operate within a 48
second time base. The following table is the ON / OFF time
ratio at each power output of the grill heating element or
magnetron.
POWER OUTPUT
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
ON TIME
48 sec.
44 sec.
40 sec.
36 sec.
32 sec.
26 sec.
22 sec.
16 sec.
12 sec.
8 sec.
OFF TIME
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
AUTOMATIC COOKING
Auto Cook functions automatically work out the correct
cooking mode and cooking time and/or cooking temperature. They will cook according to the special cooking
sequence.
POWER OUTPUT REDUCTION
After the same cooking mode is carried out for more than
the basis cooking time, the power output is automatically
reduced by turning the control relays on and off intermittently, as shown in the table below. This is to protect the
oven door against temperature rising.
Cooking mode
Basis cooking
time (minutes)
Microwave (100%)
20
Grill
15
Convection
Micro. (70%)
+ Grill
D Micro. (100%)
U + Grill
A
L Micro. (70%)
+ Conv.
Reduced power Time base
output (%)
(seconds)
70
32
70
48
FAN MOTOR OPERATION (in Grill, Convection
and Dual mode)
When oven is stopped during cooking, or after the cooking
is completed, the fan motor will operate if the oven cavity
temperature is above 120˚C, and the fan motor will stop if
the oven cavity temperature is below 105˚C.
CONVECTION MOTOR OPERATION
If the temperature of oven cavity is higher than 120˚C
after and when operated by 250˚C convection cooking,
250˚C dual convection cooking or 250˚C preheating, the
convection motor will operate for maximum 1 minute until
the oven cavity temperature drops below 105˚C.
ABSOLUTE HUMIDITY SENSOR (AH SENSOR)
COOKING CONDITION
When the AH sensor is used, the foods are cooked in
microwave cooking mode without figuring time, power
level or quantity. When the oven senses enough steam
from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and
power level needed for best results.
When the food is cooked, water vapour is developed.
The sensor “senses” the vapour and its resistance increases gradually. When the resistance reaches the value
set according to the menu, supplementary cooking is
started. The time of supplementary cooking is determined by experiment with each food category and inputted into the LSI.
An example of how sensor works:
1. Potatoes at room temperature. Vapour is emitted very
MIC
slowly.
R
OW
AVE
Not reduction
40 (Micro.)
15 (Grill)
50
50
48
48
15 (Micro.)
15 (Grill)
50
50
48
48
40 (Micro.)
50
Not reduction
48
2. Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks. ;
NOTE:
1. If the multiple sequence cooking is carried out in the
same mode, the basis cooking time is calculated from
the first.
2. Even if the cooking is stopped by the STOP key or
opening the door, the basis cooking time is calculated
from the first.
3. If the same cooking mode is repeated within 1 minute
and 15 seconds, the basis cooking time is calculated
from the first.
4. If the same manu of AUTO COOK is repeated within 1
minute and 15 seconds, the power output of the microwave or the grill will be reduced to 70% after 20 minutes
when the oven is started at first.
AH SENSOR
MIC
RO
WA
VE
3. Sensor detects moisture and humidity and calculates
cooking time and variable power.
R-953/963M - 6
OPERATION SEQUENCE
AH SENSOR COOKING SEQUENCE
1. When the AH sensor cooking condition is started, the
coil of shut-off relays (RY1+RY6) are energized, the
oven lamp and cooling fan motor are turned on, but the
power transformer is not turned on.
NOTE: The oven should not be operated on AH SENSOR
COOKING immediately after plugging in the unit.
Wait two minutes before cooking on AH SENSOR
COOKING CONDITION.
2. After about 16 seconds, the cook relay (RY2) is energized. The power transformer is turned on, microwave
energy is produced and first stage is started. The 16
seconds is the cooling time required to remove any
vapour from the oven cavity and sensor. (Figure O-2)
NOTE: During this first stage, do not open the door or
touch STOP/CLEAR pad.
3. When the sensor detects the vapour emitted from the
food, the display switches over to the remaining cooking
time and the timer counts down to zero.
At this time, the door may be opened to stir food, turn it
or season, etc.
NOTE: In case where a small quantity of food is cooked,
the oven will stop without displaying the remaining
cooking time.
4. When the timer reaches zero, an audible signal sounds.
The shut-off relay (RY1+RY6) and cook relay (RY2)
are de-energized and the power transformer, oven
lamp, etc. are turned off.
5. Operating the door or touching the STOP/CLEAR pad,
the time of day will reappears on the display and the
oven will revert to an OFF condition.
R-953/963M - 7
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
The door can be opened by pushing the open button on the
control panel. When the open button is pushed, the open
lever is pushes lower latch head on the door upward. The
upper latch head is linked with the lower latch head, so
now, the door can be opened.
CAUTION: BEFORE REPLACING A BLOWN FUSE F8A,
TEST THE MONITORED LATCH SWITCH
AND MONITOR SWITCH FOR PROPER
OPERATION. (REFER TO CHAPTER “TEST
PROCEDURE”).
FUSE 20A 250V
If the wire harness or electrical components are shortcircuited, this fuse 20A blows to prevent an electric shock
or fire hazard.
Door
FUSE F8AH 250V
Latch hook
Latch
Heads
1. If the wire harness or electrical components are shortcircuited, this fuse blows to prevent an electric shock or
fire hazard.
2. The fuse also blows when the monitored latch switch
remains closed with the oven door open and when the
monitor switch contact (COM-NC) closes.
3. The fuse also blows when the asymmetric rectifier,
H.V. rectifier,. H.V. wire harness, H.V. capacitor,
magnetron or secondary winding of high voltage transformer is shorted.
Tab
Stop switch
Monitor switch
Monitored
latch switch
TC TRANSFORMER
T/C transformer converts A.C. line voltage into low voltage
to drive the control unit.
Figure D-1. Door Open Mechanism
MONITORED LATCH SWITCH
1. When the oven door is closed, the contacts (COM-NO)
of the switch must be closed. And the contacts (COMNC) must be opened.
2. When the oven door is opened, the contacts (COMNO) of the switch must be opened. And the contacts
(COM-NC) must be closed.
STOP SWITCH
1. When the oven door is closed, the contacts (COM-NO)
of the switch must be closed.
2. When the oven door is opened, the contacts (COMNO) of switch must be opened.
MONITOR SWITCH
The monitor switch is activated (the contacts opened) by the
upper latch head on the door while the door is closed. The
switch is intended to render the oven inoperative by means of
blowing the fuse F8A when the contacts of the monitored
latch switch fail to open when the door is opened.
Function
1. When the door is opened, the contacts (COM-NC) of
monitor switch close (to the ON condition) due to their
being normally closed and contacts (COM-NO) open.
At this time the contacts (COM-NO) of monitored latch
switch is in the OFF condition (contacts open) due to
their being normally open contact switches.
2. As the door goes to a closed position, the monitor
switch contacts (COM-NC) are opened and contacts
(COM-NO) closed and then contacts (COM-NO) of
monitored latch switch and stop switch are closed. (On
opening the door, each of these switches operate
inversely.)
3. If the door is opened and the monitored latch switch
contacts (COM-NO) fail to open, the fuse F8A blows
immediately after closing of the monitor switch (COMNC) contacts.
THERMAL CUT-OUT 125˚C (MG)
This thermal cut-out protects the magnetron against overheat. If the temperature goes up higher than 125˚C because the fan motor is interrupted or the ventilation openings are blocked, the thermal cut-out will open and switch
off all the electrical parts. The defective thermal cut-out
must be replaced with a new one.
THERMAL CUT-OUT 170˚C (GRILL)
This thermal cut-out protects the oven against the overheat during grill cooking, convection cooking or dual
cooking. If the temperature rises above 170˚C because
the fan motor is interrupted, the air inlet duct is blocked or
the ventilation openings are obstructed, the thermal cutout opens and switches off all the electrical parts. When
the cools itself down to the operating temperature of
155˚C, the contacts of the thermal cut-out will close again.
THERMAL CUT-OUT 170˚C (CONV.)
This thermal cut-out protects the convection motor against
the overheat. If the temperature of the thermal cut-out
rises above 170˚C because the convection fan is interrupted, the ventilation openings are obstructed or the
other abnormal matter occurs, the thermal cut-out opens
and switches off the convection heating element and the
other electrical parts. When the cools itself down to the
operating temperature of 155˚C, the contacts of the thermal cut-out will close again.
ASYMMETRIC RECTIFIER
The asymmetric rectifier is solid state device that prevents
current flow is both directions. And it prevents the temperature rise of the high voltage transformer by blowing
the fuse F8A when the high voltage rectifier is shorted.
R-953/963M - 8
FUNCTION OF IMPORTANT COMPONENTS
D2
D1
ASYMMETRIC
RECTIFIER
HIGH VOLTAGE
RECTIFIER
The rated peak reverse voltage of D1 of the asymmetric
rectifier is 6 KV. The rated peak reverse voltage of D2 of
the asymmetric rectifier is 1.7 KV. D1 and D2 of the
asymmetric rectifier or high voltage rectifier are shorted
when the each peak reverse voltage goes beyond the
each rated peak reverse voltage. (The process of the
blowing the fuse F8A.)
1. The high voltage rectifier is shorted by some fault when
microwave cooking or dual cooking.
2. The peak reverse voltage of D2 of the rectifier goes
beyond the rated peak reverse voltage 1.7 KV in the
voltage doubler circuit.
3. D2 of the rectifier is shorted.
4. The large electric currents flow through the high voltage winding of the high voltage transformer.
5. The large electric currents beyond 8A flow through the
primary winding of the high voltage transformer.
6. The fuse F8A blows by the large electric currents.
7. The power supplying to the high voltage transformer is
cut off.
elements is circulated through the convection passage
provided on the outer casing of the oven cavity by means
of the convection fan which is driven by the convection
motor. It is then enters the inside of the oven through the
vent holes provided on the back side of the oven. Next, the
hot air heats the food on the turntable and leaves the oven
cavity through the vent in the oven cavity rear wall. In this
way, the hot air circulates inside the oven cavity to raise its
temperature and, at the same time, comes into contact
with the food being cooked. When the temperature inside
the oven cavity reaches the selected temperature, the
heating elements are de-energized. When the temperature inside the oven cavity drops below the selected
temperature, the heating elements are energized again. In
this way, the inside of the oven cavity is maintained at
approximately the selected temperature. When the convection time reaches “0”, the heating elements are deenergized and the convection fan stops operating and the
oven shuts off. At that time if the cavity air temperature has
raisen above 120˚C, the fan motor remains rotating.
Automatically the fan motor will be shut down at low
temperature (less than 105˚C).
Door
Grill Heating
Elements
Oven Cavity
Convection
Heating Element
NOISE FILTER
Cooling
Fan
The noise filter assembly prevents radio frequency interference that might flow back in the power circuit.
Turntable
TURNTABLE MOTOR
The turntable motor rotates the turntable.
Roller Stay
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 exhausting air vents of the oven cavity.
CONVECTION MOTOR
The convection motor drives the convection fan and
provides the heated air.
GRILL HEATING ELEMENT
The grill heating elements are provided to brown the food
and are located on the top of the oven cavity.
CONVECTION HEATING ELEMENT
The convection heating element escalated at the rear of
the oven cavity. It is intended to heat air driven by the
convection fan. The heated air is kept in the oven and
force-circulated and reheated by the convection heating
element.
Turntable Motor
Convection
Motor
Convection
Fan
Figure D-2. Convection Cooking System
FIRE SENSING FEATURE
The oven will stop its operation when there is a fire in the
oven cavity in microwave cooking condition.
LSI measures the voltage across the temperature measurement circuit intermittently within 32-seconds time base
since the oven is started in microwave cooking condition.
The oven will stop its operation when the difference of the
voltage is more than 0.39 volts in microwave cooking
condition.
1. Within a 32-seconds base, the thermistor is energized
for 2 seconds. At that time, the voltage across the
temperature measurement circuit is measured.
2. The oven carries out the procedure above again. If the
second voltage is 0.39V higher than first voltage, LSI
judges it is a fire in the oven cavity and stop the oven.
3. When LSI judges it is a fire in the oven cavity, LSI will
switch off the relays to high voltage transformer and fan
motor and LSI stops countering down.
30
THERMISTOR
CONVECTION COOKING SYSTEM
Convection
Passage
32 (sec.)
ON
OFF
This oven is designed with a hot air heating system where
food is heated by forced circulation of the hot air produced
by the grill heaters. The air heated by the grill heating
ON
Sensing
Voltage OFF
Sensing the voltage across temperature measurement circuit.
R-953/963M - 9
OPEN JUDGE BY THERMISTOR
FUNCTION OF IMPORTANT COMPONENTS
1. If the temperature of the thermistor does not rise to
more than 40˚C after 4 minutes and 15 seconds from
when the oven is started in convection, grill (top and
bottom grills) or dual cooking mode, the oven is turned
off.
2. When the thermistor or the wire harness to the thermistor is opened, the oven is turned off after 4 minutes and
15 seconds because this condition is same as above.
DAMPER OPEN-CLOSE MECHANISM
Damper position is set automatically by damper motor,
damper switch and motor cam.
These components are operated by a signal that judges
if microwave cooking or convection cooking operation is
selected by the CPU unit.
Microwave Cooking:
Damper is in the open position, because a portion of
cooling air is channelled through the cavity to remove
steam and vapours given off from the heating foods.
It is then exhausted at the top of the oven cavity into a
condensation compartment.
Convection Cooking:
Damper is in the closed position, so that no hot air will be
allowed to leak out the oven cavity.
Damper Operation
1. When power supply cord is plugged in or when the
control unit resumes after energy save mode finishes:
1-1. When power supply cord is plugged in, a signal is
sensed in the control unit, and operates shut-off relay
(RY8).
1-2. Contacts of shut-off relay (RY8) close, the damper
motor is energized, opening the damper door.
1-3. When the damper is moved to the open position by
the damper cam, damper switch is closed (ON position).
1-4. The signal of damper switch is re-sensed in the
control unit and shut-off relay (RY8) is turned off.
1-5. The rated voltage to the damper motor is stopped and
the motor turns off.
2. When oven is microwave cooking:
Damper is in the open position
3. When oven is convection cooking:
3-1 Damper motor is energized right after the oven is
started.
3-2. When damper is in the closed position (damper
switch is OFF), its signal is sensed by the control unit,
and shut-off relay (RY8) is de-energized.
3-3. The damper is held in the closed position during the
convection cooking operation.
3-4. At the end of the convection cooking, when the fan
motor stops, shut-off relay (RY8) is energized, and
the damper is returned to the open position.
NOTE: If the damper door is not in the proper position,
closed during convection, grill or dual, or open
during microwave, the control unit will stop oven
operation after 1 minute.
4. Operation of damper is shown below.
Cooking Mode
Operation of Damper
Microwave cooking
Open
Convection cooking
Closed
Grill; during backed up with
Closed
convection heating element
Grill; after convection heating
Open
element backed up has stopped
Dual (Microwave and Convection)
Closed
Dual (Microwave and Grill)
Open
Fir sensing condition
Closed
TROUBLESHOOTING GUIDE
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 fuse F8A in the monitored latch switch - monitor
switch circuit, check the monitored latch switch and monitor switch before replacing the fuse F8A.
R-953/963M - 10
CONDITION
OFF
CONDITION
R-953/963M - 11
COOKING
CONDITION
(COMMON MODE)
MICROWAVE
COOKING
CONDITION
CONVECTION
COOKING
CONDITION
GRILL COOKING
CONDITION
DUAL COOKING
CONDITION
(COMMON MODE)
DUAL COOKING
CONDITION
(MICRO./CONV.)
DUAL COOKING
CONDITION
(MICRO./GRILL)
SENSOR
COOKING
CONDITION
PROBLEM
Fuse F8A blows when the door is opened.
Home fuse blows when power cord is plugged into wall outlet.
Fuse 20A blows when power cord is plugged into wall outlet.
Nothing appears in display when power cord is plugged into wall outlet
and the door is opened and closed.
Display does not operate properly when STOP/CLEAR key is touched.
Oven lamp does not light when door is opened. (Display operates.)
Oven does not start when the START key is touched. (Display operates.)
Oven lamp does not light and turntable motor does not operate.
Fan motor does not operate. (Oven lamp lights.)
Convection fan motor does not operate. (Fan motor operates.)
Turntable motor does not operate. (Oven lamp lights.)
Oven or any electrical parts (except fan motor) does not stop when
cooking time is 0 or STOP/CLEAR key is touched.
Oven stops after 4 minutes and 15 seconds since START key is
touched. (Except Microwave mode and Dual cook mode)
Display operates properly but all electrical parts do not operate.
Oven goes into cook cycle but shuts down before end of cooking cycle.
After cooking, the temperature of oven cavity is higher than 120ßC but
fan motor does not operate.
The oven stops 1 minute after starting.
Oven seems to be operating but little or no heat is produced in oven
load. (Microwave power control is set at 100%)
Oven does not seem to be operating properly during variable cooking
condition except 100% cooking condition.
Oven goes into cook cycle but shuts down before end of cooking cycle.
Convection cooking mode does not heat.
Oven seems to be operating but the temperature in the oven cavity is
lower or higher than preset one.
Grill heating element does not operate.
Oven goes into cook cycle but shuts down before end of cooking cycle.
Oven seems to be operating but little or no heat is produced in oven
load. (Microwave power does not seem to be generated properly)
Oven seems to be operating but the temperature in the oven cavity is
lower or higher than preset one.
Convection heating elements do not heat.
Grill heating element does not heat.
Oven is in sensor cooking condition but AH sensor doesnot stop cooking
cycle, or oven stop soon and display shows "ERROR".
D E E E E F G G G H H H H I
J K L L
M N O O O O O O O O P Q
BLOCKED COOLING FAN
BLOCKED CONVECTION FAN
NO POWER AT WALL OUTLET
HOME FUSE OR BREAKER
MIS-ADJUSTMENT OF SWITCHES
BLOCKED VENTILATION OPENINGS
OPENED WIRE HARNESS
SHORTED WIRE HARNESS
OVEN LAMP OR SOCKET
POWER SUPPLY CORD
AH SENSOR
FOIL PATTERN ON P.W.B.
RELAY RY8
RELAY RY7
RELAY RY6
RELAY RY5
RELAY RY4
RELAY RY3
RELAY RY2
RELAY RY1
KEY UNIT
TOUCH CONTROL PANEL
TC TRANSFORMER
CONVECTION HEATING ELEMENT
GRILL HEATING ELEMENT
FUSE F8A
FUSE 20A
NOISE FILTER
DAMPER MOTOR
CONVECTION FAN MOTOR
FAN MOTOR
TURNTABLE MOTOR
THERMAL CUT-OUT 170ßC (CONV.)
THERMAL CUT-OUT 170ßC (GRILL)
THERMAL CUT-OUT 125ßC
THERMISTOR
DAMPER SWITCH
MONITOR SWITCH
STOP SWITCH
MONITORED LATCH SWITCH SW1
HIGH VOLTAGE CAPACITOR
H.V. HARNESS
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE TRANSFORMER
MAGNETRON
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
A B C
TROUBLESHOOTING GUIDE
TEST PROCEDURE
TEST PROCEDURES
PROCEDURE
LETTER
A
COMPONENT TEST
MAGNETRON OUTPUT POWER TEST
The power output of this oven is rated using the method specified by IEC 60705. Full details of how
to curry out this procedure can be found in the Sharp Technical Training notes which is available from
Sharp Parts Centre (part number SERV-LITMW01).
The IEC60705 procedure must be carried out using laboratory-type procedures and equipment.
These requirements make the procedure unsuitable for routine performance checks.
NOTE: The following test method gives an indication of the output power only, it cannot be used to
establish the actual/rated output power. If the true output power is required, then the IEC60705
test method must be used.
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 1 minute and 40 seconds on full power.
4. When the 1 min. 40 sec. 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 90.
NOTE: The result from this test should be within the allowance of 2000cc alternative method.
(±15%).
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 50mW/cm2 (equivalent to 5mW/cm2), however it
is not normal to detect any significant leakage, therefore, any leakage which is detected should be
investigated.
It is essential that only leakage detectors with current calibration traceable to National Physical
Laboratories are used.
Suitable leakage detectors: CELTEC A100
APOLLO X1
B
HIGH VOLTAGE TRANSFORMER TEST
WARNING:
High voltage and large currents are present at the secondary winding and
filament winding of the high voltage transformer. It is very dangerous to work
near this part when the oven is on. NEVER make any voltage measurements
of the high-voltage circuits, including the magnetron filament.
CARRY OUT 3D CHECKS.
Disconnect the leads to the primary winding of the high voltage transformer. Disconnect the filament
and secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low
range, it is possible to check the continuity of all three winding. The following readings should be
obtained:a. Primary winding ................................... approximately 2 Ω
b. Secondary winding .......................... approximately 127 Ω
c. Filament winding ......................................... less than 1 Ω
If the readings obtained are not stated as above, then the high voltage transformer is probably faulty
and should be replaced.
CARRY OUT 4R CHECKS.
R-953/963M - 12
TEST PROCEDURES
PROCEDURE
LETTER
C
COMPONENT TEST
HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested
using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the high
voltage rectifier and note the reading obtained. Reverse the meter leads and note this second reading.
The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.
CARRY OUT 4R CHECKS.
A
D2
D1
B
ASYMMETRIC
RECTIFIER
ASYMMETRIC RECTIFIER TEST
CARRY OUT 3D CHECKS.
C
HIGH VOLTAGE RECTIFIER
Isolate the high voltage rectifier assembly from the HV circuit. The asymmetric rectifier can be tested
using an ohmmeter set to its highest range across the terminals A+B of the asymmetric rectifier and
note the reading obtained. Reverse the meter leads and note this second reading. If an open circuit is
indicated in both directions then the asymmetric rectifier is good. If the asymmetric rectifier is shorted
in either direction, then the asymmetric rectifier is probably faulty and must be replaced with high voltage
rectifier. When the asymmetric rectifier is defective, check whether magnetron, high voltage rectifier,
high voltage wire or filament winding of the high voltage transformer is shorted.
CARRY OUT 4R CHECKS.
NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF
THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BECAUSE
OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.
D
HIGH VOLTAGE CAPACITOR TEST
CARRY OUT 3D CHECKS.
A. Isolate the high voltage capacitor from the circuit.
B. Continuity check must be carried out with measuring instrument which is set to the highest
resistance range.
C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ
after it has been charged.
D. A short-circuited capacitor shows continuity all the time.
E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ
resistance.
F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
E
SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
Table: Terminal Connection of Switch
Plunger Operation
COM to NO
COM to NC
Released
Depressed
Open circuit
Short circuit
Short circuit
Open circuit
COM; Common terminal,
NO; Normally open terminal
NC; Normally close terminal
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
R-953/963M - 13
TEST PROCEDURES
PROCEDURE
LETTER
F
COMPONENT TEST
THERMISTOR TEST
CARRY OUT 3D CHECKS.
Disconnect the connector B from CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to Pin No's C1 and C3 of the thermistor harness.
Room Temperature
20˚C - 30˚C
Resistance
Approximately 359.9 kΩ - 152 kΩ
If the meter does not indiicate above resistance, replace the thermistor.
CARRY OUT 4R CHECKS.
G
THERMAL CUT-OUT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a
continuity test across the two terminals as described in the below.
Table: Thermal Cut-out Test
Temperature of
"ON" condition
(closed circuit).
Parts Name
Temperature of
"OFF"condition
(open circuit).
Indication of ohmmeter
(When room temperature
is approx. 20˚C.)
Thermal cut-out 125˚C
This is not resetable
Above 125˚C
Closed circuit
Thermal cut-out 170˚C (GRILL)
Below 155˚C.
Above 170˚C
Closed circuit
Thermal cut-out 170˚C (CONV.)
Below 155˚C.
Above 170˚C
Closed circuit
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due to
resistricted ventilation, cooling fan failure.
An open circuit thermal cut-out (GRILL) indicates that the oven cavity has overheated, this may be due
to no load operation.
An open circuit thermal cut-out (CONV.) indicates that the convection fan motor winding has over
heated, this may be due to resisted ventilation or locked cooling fan or locked convection fan motor.
CARRY OUT 4R CHECKS.
H
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately
293 Ω
Turntable motor
Approximately
15 kΩ
Convection fan motor
Approximately
288 Ω
Damper motor
Approximately
11 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
I
NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of noise filter.
Using an ohmmeter, check between the terminals as described in the following table.
R-953/963M - 14
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
L
RED
L
20A
Cx
N
R1
L
R2 Cy
WHT
F8A
MEASURING POINTS
Between N and L
Between terminal N and WHITE
Between terminal L and RED
L (min)
Cx ± 20%
Cy ± 20%
1.0mH
0.22µF
4700pF
INDICATION OF OHMMETER
Approx. 680 kΩ
Short circuit
Short circuit
If incorrect readings are absorbed, replace the noise filter unit.
CARRY OUT 4R CHECKS.
J
BLOWN FUSE 20A
CARRY OUT 3D CHECKS.
If the fuse 20A is blown, there is a shorts or grounds in electrical parts or wire harness. Check them and
replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION:
K
Only replace fuse with the correct value replacement.
BLOWN FUSE F8A
CARRY OUT 3D CHECKS.
1. If the fuse F8A is blown when the door is opened, check the monitored latch switch and monitor
switch.
2. If the fuse F8A is blown by incorrect door switching replace the defective switch(es) and the fuse
F8A.
3. If the fuse F8A is blown, there could be shorts in the asymmetric rectifier or there is a ground in wire
harness. A short in the asymmetric rectifier may be occurred due to short or ground in H.V. rectifier,
magnetron, high voltage transformer or H.V. wire. Check them and replace the defective parts or
repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION:
L
Only replace fuse F8AH with the correct value replacement.
GRILL HEATING ELEMENTS (TOP) AND CONVECTION HEATING ELEMENT TEST
CARRY OUT 3D CHECKS.
Before carrying out the following tests make sure the heating element is cool completely.
1. Resistance of heating element.
Disconnect the wire leads to the heating element to be tested. Using ohmmeter with low resistance
range. Check the resistance across the terminals of the heating element as described in the
following table.
Table: Resistance of heating element
Parts name
Grill heating elements (top)
Convection heating element
Resistance
Approximately 44.4 Ω (22.2 Ω x 2)
Approximately 42.5 Ω
2. Insulation resistance.
Disconnect the wire leads to the heating element to be tested. Check the insulation resistance
between the element terminal and cavity using a 500V - 100MΩ insulation tester. The insulation
resistance should be more than 10 MΩ in the cold start.
If the results of above test 1 and/or 2 are out of above specifications, the heating element is probably
faulty and should be replaced.
CARRY OUT 4R CHECKS.
R-953/963M - 15
TEST PROCEDURES
PROCEDURE
LETTER
M
COMPONENT TEST
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlike conventional microwave ovens, proper maintenance can not be performed with only a voltmeter
and ohmmeter.
In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key
Unit, and also the Control unit is divided into two units, CPU unit and Power unit, and troubleshooting
by replacement is described according to the symptoms indicated.
1. Key Unit Note : Check key unit ribbon connection before replacement.
The following symptoms indicate a defective key unit. Replace the 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.
2. Control Panel
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.
2-1 In connection with pads
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light up.
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 troubles 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.
d) Proper temperature measurement is not obtained.
KEY UNIT TEST
If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
is marking 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 marking 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.
G7
G6
G5
G4
G3
G2
G1
G8
G7
G6
G5
G4
ROAST
POULTRY
ROAST
PORK
STEAK/
CHOPS
CHICKEN
PORTIONS
ROAST
BEEF/
LAMB
10 sec.
1 min.
10 min.
ROAST
POULTRY
ROAST
PORK
STEAK/
CHOPS
CHICKEN
PORTIONS
CANNED
FOOD
FRESH
VEG.
MORE
LESS
FROZEN
READY
MEALS
AUTO
START
CLOCK
ROAST
BEEF/
LAMB
CHILLED
READY
MEALS
START
AUTO
MINUTE
RICE/
PASTA
STOP
CLEAR
MORE
DUAL
CONV./
GRILL
LESS
G10
AUTO
COOK
GRILL
AUTO
START
CLOCK
START
AUTO
MINUTE
Kg / Lb
UP
MICRO.
POWER
DOWN
KITCHEN
TIMER
CONV.
(˚C)
STOP
CLEAR
R-953(SL)M/(W)M
G11
MINCED
MEAT
G 9
G8
G12
G11
G10
G 9
CARRY OUT 4R CHECKS.
G12
N
MINCED
MEAT
DUAL
CONV./
GRILL
Kg / Lb
G3
G2
G1
10 sec.
1 min.
10 min.
FRESH
FISH
GRILL
AUTO
COOK
UP
MICRO.
POWER
DOWN
KITCHEN
TIMER
CONV.
(˚C)
R-963(SL)M/(W)M
R-953/963M - 16
info
TEST PROCEDURES
PROCEDURE
LETTER
O
COMPONENT TEST
RELAY TEST
CARRY OUT 3D CHECKS.
Remove the outer case and check voltage between Pin Nos. 1 and 3 of the 4 pin connector (E) on the
control unit with an A.C. voltmeter.
The meter should indicate 230-240 volts, if not check oven circuit.
Relay Test
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation, grill
operation, convection operation or dual 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. 18.0V D.C.
Oven lamp / Turntable motor
RY2
Approx. 18.0V D.C.
High voltage transformer
RY3
Approx. 24.0V D.C.
Grill (Top) heating element
RY4
Approx. 24.0V D.C.
Convection heating element
RY5
Approx. 24.0V D.C.
Touch control transformer
RY6
Approx. 24.0V D.C.
Fan motor
RY7
Approx. 24.0V D.C.
Convection motor
RY8
Approx. 24.0V D.C.
Damper motor
CARRY OUT 4R CHECKS.
P
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.
CARRY OUT 3D CHECKS.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
The rated AC voltage is not present between
Pin Nos. 1 and 3 of the 4-pin connector (E).
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.
3
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE REPAIR.)
4
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR.)
b
a
R-953/963M - 17
(J2)
VRS1
CN - A 1
(J1)
c
CARRY OUT 4R CHECKS.
9
d
7
CN - E
NOTE: *At the time of these repairs, make a
visual inspection of the varistor for
burning damage and examine the
transformer with tester for the presence of layer short circuit (check primary coil resistance). If any abnormal
condition is detected, replace the defective parts.
TEST PROCEDURES
PROCEDURE
LETTER
Q
COMPONENT TEST
AH SENSOR TEST FOR R- 963(SL)M/(W)M
Checking the initial sensor cooking condition
(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 35˚C.
(3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the "INSTALLATION
Instructions" .
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To
permit adequate ventilation, be sure to install so as not to block these vents. There should be some
space for air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any
moisture with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would
be at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapour given of by the spray and turn off before food is properly cooked.
(8) If the sensor has not detected the vapour of the food, ERROR will appear and the oven will shut
off.
Water load cooking test
Make sure the oven has been plugged in at least five minutes before checking sensor cook operation.
The cabinet should be installed and screws tightened.
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch FRESH FISH pad. Now, the oven is in the sensor cooking condition and "FRESH FISH"
will appear in the display.
(5) The oven will operate for the first 16 seconds, without generating microwave energy.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage
of sensor cooking.
(6) After approximately 16 seconds, microwave energy is produced, and the display should start to
count down the remaining cooking time, and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation
below.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Remove the AH sensor.
(4) Install the new AH sensor.
(5) Re-install the outer case.
(6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
6-2. Place the container on the center of tray in the oven cavity.
6-3. Close the door.
6-4. Touch FRESH FISH pad.
6-5. The control panel is in automatic sensor operation.
6-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (babbling).
If new sensor dose not operate properly, the problem is with the control unit.
CHECKING CONTROL UNIT
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Disconnect the wire leads from the cook relay.
(4) Disconnect the sensor connector that is mounted to lower portion of control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Reconnect the oven to the power supply and check the sensor cook operation, proceed as follows:
6-1. Touch FRESH FISH pad.
6-2. The control panel is in the sensor cooking operation.
6-3. After approximately 30 seconds, push plunger of select switch. This condition is same as
judgement by AH sensor.
R-953/963M - 18
TEST PROCEDURES
Plunger
6-4. After approximately 3 seconds, the display shows "STAND COVER".
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
To connector (F)
on Control Unit.
1
F-1
F-2
2
3
COM
COM NO
R1
F-3
CONNECTOR
NC
NO
R2
R3
R4
NC
R1,R2 : 22Ω ± 1% 1/2W
R3 : 4.3kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
Sensor Dummy Resistor Circuit
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units as
shown in the touch control panel circuit.
(1) Key Unit
(2) Control Unit (The Control unit consists of Power unit
and CPU unit.)
The principal functions of these units and signals communicated among them are explained below.
Key Unit
The key unit is composed of a matrix, signals generated in
the LSI are sent to the key unit from P10, P11, P12, P13,
P14, P15, P16 and P17.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through P70, P71,
P72 and P73 to perform the function that was requested.
Control Unit
Control unit consists of LSI, power source circuit, synchronizing signal circuit, ACL circuit, buzzer circuit, relay
circuit, temperature measurement circuit, indicator circuit,
absolute humidity sensor circuit and back light circuit.
1) LSI
This LSI controls the temperature measurement signal, absolute humidity sensor signal, key strobe signal,
relay driving signal for oven function and indicator
signal.
2) Power Source Circuit
This circuit generates voltage necessary in the control
unit.
Symbol
VC
Voltage
-5.2V
Application
LSI(IC1)
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit. It accompanies a very small error because it
works on commercial frequency.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit
audible sounds (key touch sound and completion
sound).
6) Door Sensing Switch (Stop Switch)
A switch to "tell" the LSI if the door is open or closed.
7) Relay Circuit
To drive the magnetron, grill heating element, convection heating element, convection motor, fan motor,
turntable motor, damper motor, touch control transformer and light the oven lamp.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD10 - LD19).
9) Indicator Circuit
This circuit consists 40-segments and 16-common
electrodes using a Liquid Crystal Display.
The Liquit Crystal Display (LCD) is drived by LCD
driver IC3.
10) Temperature Measurement Circuit : (OVEN
THERMISTOR)
The temperature in the oven cavity is sensed by the
thermistor. The variation of resistance according to
sensed temperature is detected by the temperature
measurement circuit and the result applied to LSI.
The LSI uses this information to control the relay
and display units.
11) Damper Switch
A switch to tell the LSI if the damper is open or
close.
12) Absolute Humidity Sensor Circuit (For only R963(SL)M/(W)M)
This circuit detects the humidity of the food which is
being cooked, to control its automatic cooking.
4) ACL
A circuit to generate a signal which resets the LSI to the
initial state when power is supplied.
R-953/963M - 19
DESCRIPTION OF LSI
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
1
AN0
AN0
IN
IN
Terminal not used. (For only R-953(SL)M/(W)M)
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input
is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI. (For only R-963(SL)M/(W)M)
2
P77
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
3
P76
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
4-5
P75-P74
OUT
6
P73
IN
Signal coming from touch key.
When any one of G9 line keys on key matrix is touched, a corresponding signal
from P10, P11, P12, P13, P14, P15, P16 and P17 will be input into P73. When no
key is touched, the signal is held at "L" level.
7
P72
IN
Signal similar to P73.
When any one of G10 line keys on key matrix is touched, a corresponding signal
will be input into P72.
8
P71
IN
Signal similar to P73.
When any one of G11 line keys on key matrix is touched, a corresponding signal
will be input into P71.
9
P70
IN
Signal similar to P73.
When any one of G12 line keys on key matrix is touched, a corresponding signal
will be input into P70.
P57-P56
OUT
Terminal not used.
P55
OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven
cavity reaches the preset
temperature in the preheating mode,
or when the preheating hold time (30
minutes) is elapsed.
10-11
12
Terminal not used.
0.12 sec
A
2.4 sec
B
1.2 sec
1.2 sec
H: GND
C
L
13-17
P54-P50
OUT
Terminal not used. (For only R-953(SL)M/(W)M)
13-17
P54-P50
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor). (For only
R-963(SL)M/(W)M)
18
P47
OUT
19
P46
IN
20
21
P45
P44
OUT
OUT
Terminal not used.
Input signal which communicates the damper open/close information to LSI.
Damper opened; "H" level signal (0V:GND).
Damper closed; "L" level signal (-5V:VC).
Terminal not used.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay ON/OFF time ratio in Micooking
(RY2). In 100% operation, the cro
(a. 32second time base)
signals hold "L" level during
OFF
microwave cooking and "H" level MICRO ON
COOK
while not cooking. In other
100% 32 sec. 0 sec.
cooking modes (70%, 50%, 30%,
70% 24 sec. 8 sec.
10%) the signal turns to "H" level
50% 18 sec. 14 sec.
and "L" level in repetition
30% 12 sec. 20 sec.
according to the power level.
10%
R-953/963M - 20
6 sec. 26 sec.
ON/OFF time ratio in Micro cooking
(a. 48second time base)
MICRO
COOK
100%
70%
50%
30%
10%
ON
OFF
48 sec.
36 sec.
26 sec.
16 sec.
8 sec.
0 sec.
12 sec.
22 sec.
32 sec.
40 sec.
DESCRIPTION OF LSI
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
Pin No.
22
23
Signal
I/O
Description
INT1
INT0
OUT
IN
Terminal not used.
Signal to synchronized LSI with commercial power source frequency(50Hz).
This is basic timing for time processing
H : GND
of LSI.
L (-5V)
20 msec.
24
25
CNVSS
RESET
IN
IN
Connected to VC.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily
set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter
set at "H" level.
26
27
28
P41
P40
XIN
IN/OUT
OUT
IN
Memory (EEPROM) data input/output.
Memory (EEPROM) clock out.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
29
XOUT
OUT
30
VSS
IN
31
P27
OUT
Grill (TOP) heating element driving signal.
To turn on and off the grill heating
element relay (RY3). "L" level during
grill cooking, convection cooking or
dual cooking, "H" level otherwise.
The heater relay turns on and off
within a 48 second time base in
accordance with the special program
in LSI.
32
P26
OUT
Convection heating element driving signal.
To turn on and off the relay (RY4). "L"
level during grill cooking, convection
cooking or dual cooking, "H" level
otherwise.
The heater relay turns on and off within
a 48 second time base in accordance
with the special program in LSI.
33
P25
OUT
Oven lamp and turntable motor driving signal(Square Waveform : 50Hz).
20 msec.
To turn on and off shut-off relay (RY1).
H
The square waveform voltage is
delivered to the relay (RY1) driving
L
During cooking
circuit.
34
P24
OUT
Convection motor driving signal.
To turn on and off shut-off relay(RY7). "L"
level during convection or dual cooking "H"
level otherwise. (Relay RY7 does not turn on
at preheating mode.)
35
P23
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
Power source voltage: -5V.
VC voltage of power source circuit input.
Fan motor driving signal.
To turn on and off the fan motor relay RY6. "L"
level during cooking, or for 5 minutes after grill
cooking or for a while after convection or dual
cooking. "H" level otherwise.
R-953/963M - 21
Power output
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
Power output
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
ON
ON time
48 sec.
44 sec.
40 sec.
36 sec.
32 sec.
26 sec.
22 sec.
16 sec.
12 sec.
8 sec.
ON time
48 sec.
44 sec.
40 sec.
36 sec.
32 sec.
26 sec.
22 sec.
16 sec.
12 sec.
8 sec.
During
cooking
(Convection or dual cooking)
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
H. GND
OFF
OFF
ON
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
L
H. GND
L
During cooking or for awhile after
grill convection or dual.
DESCRIPTION OF LSI
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
36
P22
OUT
Terminal not used.
37
P21
OUT
Damper motor relay driving signal.
To turn on and off shut-off relay (RY8).
OFF
ON
H. GND
L
38
P20
OUT
Touch control transformer driving signal.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 2 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
39
P17
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G8 line key on matrix is touched.
40
P16
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G7 line key on matrix is touched.
41
P15
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G6 line key on matrix is touched.
42
P14
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G5 line key on matrix is touched.
43
P13
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G4 line key on matrix is touched.
44
P12
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G3 line key on matrix is touched.
45
P11
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G2 line key on matrix is touched.
46
P10
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G1 line key on matrix is touched.
47-52
P07-P02
OUT
Terminal not used.
53-54
P01-P00
OUT
Data output terminal to LCD driver IC3.
55-62
P37-P30
OUT
Data output terminal to LCD driver IC3.
63-66
P87-P84
OUT
Data output terminal to LCD driver IC3.
67-70
P83-P80
IN
Input terminal to change the specification of model.
71
VCC
IN
Connected to GND.
72
VREF
IN
Connected to GND.
73
AVSS
IN
Connected to VC.
AN7-AN5
IN
Heating constant compensation terminal.
77
AN4
OUT
78
AN3
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.
79
AN2
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
80
AN1
IN
Terminal not used. (For only R-953(SL)M/(W)M)
80
AN1
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected
to the A/D converter built into the LSI. (For only R-963(SL)M/(W)M)
74-76
Terminal not used.
R-953/963M - 22
ABSOLUTE HUMIDITY SENSOR CIRCUIT
300k
14
R100
150k
15
R101
75k
16
R102
37.4k
17
C. Thermistor in
closed vessel
S. Thermistor in
open vessel
R97
47k
F-1
C
R96
F-3
3.57k
C90
Absolute humidity (g/m 2 )
S
R-953/963M - 23
F-2
R91
3.32k R92
1.8k
6
8
+
IC2
4
7
R94
R95
10k
47k
R93
360k
R90
(3) Detector Circuit of Absolute Humidity Sensor Circuit
This detector circuit is used to detect the output voltage
of the absolute humidity circuit to allow the LSI to
control sensor cooking of the unit. When the unit is set
in the sensor cooking mode, 16 seconds clearing cycle
occurs than the detector circuit starts to function and
the LSI observes the initial voltage available at its AN1
terminal.
5
1
VA : -15V
VA : -15V
P53
P52
P51
P50
VC : -5V
SW2
SW3
SW4
SW5
AN0
0.01uF
S : Thermistor
open vessel
C : Thermistor
closed vessel
R99
SW1
P54
LSI
(IC1)
C92
R3
R2
13
0.015uF
S
R1
620k
R98
Absolute humidity vs,
output voltage characteristic
Output voltage
C
Operational
amplifier
Output
voltage
+
1) Absolute humidity sensor circuit
C93
(2) Operational Principle of Absolute Humidity Sensor
The figure below shows the basic structure of an
absolute humidity sensor. A bridge circuit is formed by
two thermistors and two resistors (R1 and R2).
The output of the bridge circuit is to be amplified by the
operational amplifier.
Each thermistor is supplied with a current to keep it
heated at about 150˚C, the resultant heat is dissipated
in the air and if the two thermistors are placed in
different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the
bridge circuit, the intensity of which is increased as the
absolute humidity of the air increases. Since the output
is very minute, it is amplified by the operational amplifier.
0.01uF
Sensing part
(Closed vessel)
0.1
uF
Sensing part
(Open vessel)
With this voltage given, the switches SW1 to SW5 in
the LSI are turned on in such a way as to change the
resistance values in parallel with R97 ~ R102. Changing the resistance values results in that there is the
same potential at both F-3 terminal of the absolute
humidity sensor and AN0 terminal of the LSI. The
voltage of AN1 terminal will indicate about -2.5V. This
initial balancing is set up about 16 seconds after the
unit is put in the Sensor Cooking mode. As the sensor
cooking proceeds, the food is heated to generate
moisture by which the resistance balance of the bridge
circuit is deviated to increase the voltage available at
AN1 terminal of the LSI.
Then the LSI observes that voltage at AN1 terminal and
compares it with its initial value, and when the comparison rate reaches the preset value (fixed for each menu
to be cooked), the LSI causes the unit to stop sensor
cooking; thereafter, the unit goes in the next operation
automatically.
When the LSI starts to detect the initial voltage at AN1
terminal 16 seconds after the unit has been put in the
Sensor Cooking mode, if it is not possible to balance
the bridge circuit to disconnection of the absolute
humidity sensor, ERROR will appear on the display
and the cooking is stopped.
C91
(1) Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors
as shown in the illustration. One thermistor is housed
in the closed vessel filled with dry air while another in
the open vessel. Each sensor is provided with the
protective cover made of metal mesh to be protected
from the external airflow.
80
AN1
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.
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, 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.
approx. 1M ohm
2. Shapes of Electronic Components
(2) Servicing the touch control panel with power
supply from an external power source:
E
C
B
Transistor
2SB1238
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).
Transistor
KRC243M
E
CB
3. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the precautions you must take when doing so.
To perform the servicing, power to the touch control panel
is available either from the power line of the oven itself or
from an external power source.
(1) Servicing the touch control panel with power
supply of the oven :
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING
SERVICING AND PRESENTS A HAZARD .
Therefore, before checking the performance of the touch
control panel,
1) Disconnect the power supply cord, and then remove
outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power
transformer.
5) Ensure that these leads remain isolated from other
components and oven chassis by using insulation
tape.
6) After that procedure, re-connect the power supply
cord.
After checking the performance of the touch control
panel,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Re-connect the leads to the primary of the power
transformer.
4) Re-install the outer case (cabinet).
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-953/963M - 24
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below
before operating the oven.
1. Disconnect oven from power supply.
2. Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal or 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.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
WARNING FOR WIRING
To prevent an electric shock, take the following
manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage capacitor and High voltage rectifier assembly.
2) Hot parts:
Grill heating element, Convection heating ele-
ment, Oven lamp, Magnetron, High voltage transformer and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Turntable motor,
Convection motor, Convection fan, Cooling fan.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin
is locked. And make sure that the wire leads should
not come off even if the wire leads is pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
OUTER CASE REMOVAL
To remove the outer case proceed as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the one (1) screw holding the air to the oven
cavity rear plate.
4. Remove the air duct.
5. Remove the nine (9) screws from rear and along the
side edge of case.
6. Slide the entire case back about 3 cm to free it from
retaining clips on the cavity face plate.
7. Lift the entire case from the oven.
8. Discharge the H.V. capacitor before carrying out any
further work.
10.Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 8 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN
COMPONENT OR WIRING.
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament lead of the high voltage transformer and the high voltage wire of the high voltage
transformer from the high voltage capacitor.
3. Disconnect the high voltage wire B from the high
voltage capacitor.
4. Remove one (1) screw holding earth side terminal of
the high voltage rectifier assembly to the base plate
through the capacitor holder.
5. Release the capacitor holder from the base plate.
8. Remove the high voltage capacitor from the capacitor
holder.
R-953/963M - 25
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
7. Disconnect the high voltage rectifier assembly from the
high voltage capacitor.
8. Now, the high voltage rectifier assembly and the high
voltage capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE BASE
PLATE THROUGH THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
HIGH VOLTAGE TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the high voltage transformer.
3. Disconnect the filament leads and high voltage wire of
high voltage transformer from high voltage capacitor
and the magnetron.
4. Remove the two (2) screws and one (1) washer holding
the transformer to the base plate.
5. Remove the transformer.
6. Now the high voltage transformer is free.
MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Carefully remove four (4) screws holding the magnetron
to the waveguide, when removing the screws hold the
magnetron to prevent it from falling.
4. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
5. Remove the magnetron guide H from the magnetron.
6. Remove the one (1) screw holding the magnetron
guide V to the magnetron.
7. Now, the magnetron is free.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the
control unit.
3. Remove the one (1) screw holding the earth wire to the
oven cavity face plate.
4. Lift up the control panel assembly and pull it forward.
Now the control panel assembly is free.
NOTE:
1. Before attaching a new key unit, wipe off 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 not to scratch.
FAN MOTOR REPLACEMENT
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the
chassis support.
3. Release the noise filter from the tabs of the fan duct.
4. Remove the four (4) screws holding the chassis support to the oven cavity front flange, back plate, air
intake duct and the magnetron.
5. Remove the chassis support from the oven cavity.
6. Disconnect the wire leads from the fan motor.
7. Remove the one (1) screw holding the fan duct to the
back plate.
8. Release the tabs of the fan duct from back plate.
9. Remove the fan duct from the oven.
10.Remove the fan blade from the fan motor shaft according to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
a pair of groove joint pliers.
CAUTION:
• Make sure that no swarf from the rotor enters
the gap between the rotor & stator of the fan
motor.
• Avoid touch the coil of the fan motor with the
pliers as the coil may become cut or damaged.
• Avoid deforming the bracket whilst using the
pliers.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
3) Now, the fan blade is free.
CAUTION:
• Do not reuse the removed fan blade as the
fixing hole may be oversize.
11.Remove the two (2) screws holding the fan motor to the
fan duct.
12.Now, the fan motor is free.
INSTALLATION
1. Install the the fan motor to the fan duct with the two (2)
screws and nuts.
2. Install the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) Apply the screw lock tight into the hole (for shaft) of
the fan blade.
3) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight,
rubber mallet.
R-953/963M - 26
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CAUTION:
• Do not hit the fan blade when installing because the bracket may be deformed.
• Make sure that the fan blade rotates smoothly
after installation.
• Make sure that the axis of the shaft is not
slanted.
Coil
3. Insert the tabs of the fan duct to the back plate.
4. Install the fan duct to the back plate with the one (1)
screw.
5. Re-install the chassis support to the oven cavity with the
four (4) screws.
6. Install the noise filter to the fan duct and the chassis
support with the one (1) screw.
7. Re-connect the wire leads to the fan motor.
Shaft
Groove joint pliers
Shaft
Axis
Stator
Gap
Bracket
These are the positions
that should be pinched
with pliers.
Stator
Rotor
Rear view
Table
Center of
bracket
Rotor
Side view
TURNTABLE MOTOR REPLACEMENT
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable and roller stay from the oven
cavity.
3. Turn the oven over.
4. Cut the three (3) bridges holding the turntable motor
cover to the base plate with cutting pliers as shown in
Figure C-1(a).
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
5. Remove the turntable motor cover from the base plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the two (2) screws holding the turntable motor
to the oven cavity back plate.
8. Remove the turntable motor from the turntable motor
angle. Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor
cover and the base plate with the cutting pliers.
2. Re-install turntable motor by locating shaft onto coupling to the oven cavity base plate with the two (2)
screws.
3. Re-connect the wire leads to the turntable motor.
4. Insert the one (1) tab of the turntable motor cover into
the slit of the base plate as shown in Figure C-1(b).
5. Re-install the turntable motor cover to the base plate
with the screw (XHPSD40P08K00) as shown in Figure
C-1(b). Turntable
motor cover
Cutting pliers
Base plate
Tab
Bridges
Screw: XHPSD40P08K00
Base plate
Slit
Turntable
motor cover
Figure C-1(a). Turntable motor cover removal
Figure C-1(b). Turntable motor cover re-install
CONVECTION MOTOR AND CONVECTION HEATING ELEMENT REMOVAL
1. CARRY OUT 3D CHECKS.
Now,the outer case cabinet and the air duct should
have been removed.
2. Remove the one (1) screw holding the earth wire of the
power supply cord to the back plate.
3. Release the power supply cord from the back plate.
4. Remove the two (2) screws holding the rear barrier to
the base plate.
5. Release the three (3) tabs of rear barrier from the base
plate. And remove the rear barrier.
6. Remove the one (1) screw holding the back plate to the
base plate.
7. Remove the one (1) screw holding the chassis support
to the back plate.
8. Remove the one (1) screw holding the the back plate
to the air intake duct.
9. Remove the two (2) screws holding the back plate to
the convection duct.
10.Remove the back plate from the oven cavity.
11.Disconnect the wire leads from the convection heating
elements, convection motor and thermal cut-out.
12.Remove the one (1) screw holding the convection duct
to the oven cavity back plate from outside of the oven
cvity.
13.Remove the seven (7) screws holding the convection
duct to the oven cavity back plate from inside of the
oven cvity.
14.Lift up the convection duct and release the three (3)
tabs of the oven cavity back plate from the convection
duct.
15.Now, the convection unit assembly is free.
R-953/963M - 27
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CONVECTION HEATING ELEMENT REMOVAL
15.Remove the two (2) screws holding the convection
heating element to the convection duct.
16.Remove the one (1) screw holding the convection
heater angle to the convection duct.
17. Remove the one (1) screw holding the convection
heater angle and the air separate angle D to the
convection duct.
18. Remove the one (1) screw holding the convection
heater angle A to the convection duct.
19. Remove the convection heating element from the
convection duct.
20. Now, the convection heating element is free.
CONVECTION MOTOR REMOVAL
15. Remove the one (1) nut and washer from the convection motor shaft.
16. Remove the convection fan from the convection motor
shaft.
17. Remove the pipe from the convection motor shaft.
18. Remove the two (2) screws holding the convection
motor angle to the convection duct.
19.Remove the cooling fan from the convection motor
shaft.
20. Remove the two (2) screws holding the convection
motor to the convection motor angle.
21. Remove the one (1) ring from the convection motor
shaft.
22. Now, the convection motor is free.
POSITIVE LOCK® CONNECTOR REMOVAL
Terminal
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock® connector.
3. Pull down on the positive lock® connector.
Positive lock®
connector
1
Push
Lever
CAUTION: WHEN YOU (SERVICE ENGNEERS) CONNECT THE POSITIVE LOCK® CONNECTORS TO THE TERMINALS, CONNECT
THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU (SERVICE ENGNEERS).
2
Pull down
Figure C-2. Positive lock®connector
OVEN LAMP SOCKET REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the wire leads as Positive lock® connector
removal above.
3. Lift up the oven lamp from its retaining clips by pushing
the tab of the air intake duct.
4. Now, the oven lamp is free.
LOCK
BULB
Figure C-3. Oven lamp
POWER SUPPLY CORD REPLACEMENT
Removal
Re-install
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/yellow
wire to the back plate.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-4(a).
4. Release the power supply cord from the rear cabinet.
5. Now, the power supply cord is free.
1. Insert the moulding cord stopper of power supply cord
into the square hole of the power angle, referring to the
Figure C-4(b).
2. Install the earth wire lead of power supply cord to the
back plate with one (1) screw and tight the screw.
3. Connect the brown and blue wire leads of power supply
cord to the noise filter correctly, referring to the Pictorial
Diagram.
;
;;;;
Power supply
cord
Back plate
Blue wire
N
L
F1
TP TL
Noise filter
Moulding cord stopper
RED WHIT
Green/
Yellow wire
Brown wire
Power supply cord
Back plate
F2
Square hole
Figure C-4 (a) Replacement of Power Supply Cord
Figure C-4(b). Power Supply Cord Replacement
R-953/963M - 28
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
GRILL HEATING ELEMENTS REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from the thermal cut-out (GRILL).
3. Remove the two (2) screws holding the AH sensor
assembly to the exhaust duct and remove the AH
sensor assembly (only for R-963M)
4. Remove the two (2)screws holding the two (2) terminals of the main wire harness to the two (2) grill heating
elements.
5. Remove the one (1) screw holding the exhaust duct to
the oven cavity top plate.
6. Remove the exhaust duct from the oven cavity top
plate.
7. By pushing the two (2) tabs holding the grill reflector to
the oven cavity top plate, slide the grill reflector toward
the magnetron. And then lift up the grill reflector and
remove it.
8. Remove the one (1) screw holding the grill heater angle
to the grill heater reflector.
9. Straighten the two (2) tabs of the grill heater angle and
remove the grill heater angle from the grill reflector.
10.Remove the two (2) screws holding the earth plate to
the two (2) grill heating elements.
11.Remove the two (2) grill heating elements from the grill
reflector.
12.Now, the grill heating elements are free.
MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to "CONTROL PANEL ASSEMBLY REMOVAL".
3. Disconnect the leads from all switches.
4. Remove the two (2) screws holding the latch hook to
the oven cavity.
5. Remove the latch hook.
6. Remove the switch(es) from the latch hook by pushing
the retaining tab backwards slightly and turning the
switch(es) on the post.
7. Now the switch(es) is free.
Stop switch
Monitor switch
Tab
Post
Post
Monitored
latch switch
Figure C-5. Switches
MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
If the monitored latch switch, stop switch and monitor
switch do not operate properly due to a mis-adjustment,
the following adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen the two (2) screws holding the latch hook to
the oven cavity front flange.
3. With the door closed, adjust the latch hook by moving
it back and forward or up and down. In and out play of
the door allowed by the latch hook should be less than
0.5 mm. The horizontal position of the latch hook
should be placed where the monitor switch has activated with the door closed. The vertical position of the
latch hook should be placed where the monitored latch
switch and stop switch have activated with the door
closed.
4. Secure the screws with washers firmly.
5. Make sure of the all switches operation. If the latch
head has not pushed the plungers of the monitor
switch with door closed, adjust the latch hook position.
At that time, the latch head should have pushed the
plungers of the monitored latch switch and stop switch.
If the latch head has not pushed the plungers of the
monitored latch switch and stop switch with door
closed, loose two (2) screws holding latch hook to
oven cavity front flange and adjust the latch hook
position.
2.
3.
4.
5.
the oven face. Then check the lower latch hook position, pushing and pulling lower portion of the door
toward the oven face. Both results (play of the door)
should be less than 0.5mm.
The stop switch interrupt the circuit before the door
can be opened.
When the door is opened the contacts (COM-NC) of
the monitor switch and monitored latch switch close.
And the contacts (COM-NO) of their switches open.
When the door is closed the contacts (COM-NC) of the
monitor switch and monitored latch switch open. And
the contacts (COM-NO) of their switches close.
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 hook
Latch
Heads
Tab
Stop switch
Monitor switch
After adjustment, make sure of following:
1. In and out play of door remains less than 0.5 mm when
latched position. First check the latch hook position,
pushing and pulling upper portion of the door toward
R-953/963M - 29
Monitored
latch switch
Figure C-6 Latch Switches Adjustment
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
DOOR REPLACEMENT
REMOVAL
1.
2.
3.
4.
5.
6.
Disconnect the oven from the power supply.
Push the door slightly.
Remove the door stopper from the choke cover.
Lift the door upwards.
Now, door assembly is free from oven cavity.
Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-7 to free engaging parts.
7. Release choke cover from door panel.
8. Now choke cover is free.
Door stopper
Putty knife
Choke cover
Door frame
6. Re-install choke cover to door panel by clipping into
position.
7. Locate door panel hinge pins into cavity hinge location
holes.
8. Re-install the door stopper to the chock cover
Note: After any service to the door;
(A) Make sure that the monitor switch, monitored
latch switch and stop 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.
(Refer to Microwave Measurement Procedure.)
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through centre 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:
Figure C-7. Door Disassembly
DOOR PANEL
9. Remove the six (6) screws holding the door panel to the
door frame.
10.Release door panel from door frame by lifting up the
door panel.
11.Now, door panel is free.
LATCH HEAD AND SPRING
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.
DOOR HANDLE AND FRONT DOOR GLASS
14.Remove the two (2) screws holding the door handle to
the door frame.
15.Remove the door handle from the door frame.
16.Slide the front door glass rightwards and then remove
it.
17.Now, the front door glass is free
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 lighttight. 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.
Pin
Door
assembly
RE-INSTALL
1. Re-install the front door glass to the door frame as
follows.
a) Insert the front door glass into the door frame.
b) Slide the front door glass leftwards.
2. Re-install the door handle to the door frame as follows.
a) Insert the door handle to the door frame.
b) Hold the door handle to the door frame with the two
(2) screws.
3. Re-install the latch spring to the latch head. Re-install
the latch spring to the door frame. Re-install latch head
to door frame.
4. Re-install door panel to door frame.
5. Hold the door panel to the door frame with six (6)
screws.
R-953/963M - 30
Upper oven hinge
Lower
oven
hinge
Lower oven
Pin hinge
Figure C-8. Door Replacement
MICROWAVE MEASUREMENT
After any repair, the microwave oven must be checked for
microwave leakage to ensure continued safe operation.
BS EN 60335-2-25 specifies that the maximum permitted
leakage with a load of 275 ml is 50 W/m2 (equivalent to 5
mW/cm2) 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 stand whose accuracy
can be traced to National Physical Laboratory Standards.
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
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.
Dotted line indicates the path taken by the leakage detector.
Whilst the maximum leakage permitted in BS EN 60335-2-25 is 50 W/m2 (equivalent to 5 mW/cm2), it is not normal
to detect any significant leakage, and therefore any detected leakage should be investigated.
R-953/963M - 31
GRILL
THERMAL
CUT-OUT
N
DAMPER
THERMISTOR SWITCH
RY5
R-953/963M - 32
MONITORED LATCH SWITCH
RY6
STOP
SWITCH
COM.
N.O .
N.C.
COM.
MONITOR N.C.
SWITCH
N.O.
Figure O-1(b) Oven Schematic-OFF Condition when the oven door is opened.
ASYMMETRIC
RECTIFIER
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
N.O.
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
COM.
CONVECTION HEATING ELEMENT
N.O .
N.C.
TTM
RY8
TTM
CM
H.V. RECTIFIER
CAPACITOR
1.16 µF
AC2100V
GRILL HEATING ELEMENTS
FM
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
CONVECTION HEATING ELEMENT
FAN MOTOR
CONVECTION MOTOR
TURNTABLE MOTOR
OL
OVEN LAMP
D3
DM
DAMPER MOTOR
N.O.
COM.
N.O.
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
E1
CONV.
THERMAL
CUT-OUT
FUSE
F8A
NOISE
FILTER
" "
TURNTABLE MOTOR
COM.
FM
MONITORED LATCH SWITCH
FAN MOTOR
STOP
SWITCH
CM
D1
RY7
CONVECTION MOTOR
RY6
AH SENSOR A7
(Only for R-963M)
F3
F2
RY8
OL
RY4
D3
DM
DAMPER MOTOR
N.O.
E3
MAG.
THERMAL
CUT-OUT
L
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. PLUGGED IN OVEN.
3. NOTHING APPEARS ON DISPLAY.
OVEN LAMP
RY7
D1
CONTROL
UNIT
F1
A5
B1
B2
B4
B3
C1
E7
4700p/ 250V
680 k/ 0.5W
RY4
AH SENSOR A7
(Only for R-963M)
RY3
F3
COM.
N.O.
CONV.
THERMAL
CUT-OUT
C3
A3
E5
RY5
F2
RY2
COM.
N.O.
COM.
N.O.
COM.
A1
GRILL
THERMAL
CUT-OUT
4700p/ 250V
10M/ 0.5W
FUSE 20A
LIVE
BRN/15
230 - 240V ~ 50Hz
NOISE SUPPRESSION COIL
0.22µ/250V
EARTH
G-Y/15
CONTROL
UNIT
A5
E1
RY1
RY3
F1
E3
FUSE
F8A
NOISE
FILTER
N
DAMPER
THERMISTOR SWITCH
B1
E7
L
NEUTRAL
RY2
B2
E5
MAG.
THERMAL
CUT-OUT
T/C TRANSFORMER
4700p/ 250V
680 k/ 0.5W
NOISE SUPPRESSION COIL
10M/ 0.5W
FUSE 20A
LIVE
BRN/15
BLU/15
RY1
B4
B3
C1
C3
A3
4700p/ 250V
EARTH
G-Y/15
0.22 /250V
BLU/15
NEUTRAL
230 - 240V ~ 50Hz
SCHEMATIC DIAGRAMS
Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND YELLOW STRIPE
/15 :
SECTIONAL AREA OF 1.5mm2 MIN.
Indicates components with potential
above 250 V.
MONITOR N.C.
SWITCH
ASYMMETRIC
RECTIFIER
Figure O-1(a) Oven Schematic-OFF Condition right after the oven is plugged in.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR OPENED.
2. "ENERGY SAVED MODE" APPEARS ON DISPLAY.
GRILL
THERMAL
CUT-OUT
N
DAMPER
THERMISTOR SWITCH
RY5
R-953/963M - 33
MONITORED LATCH SWITCH
RY6
STOP
SWITCH
COM.
N.O .
N.C.
TTM
RY8
COM.
Figure O-2 Oven Schematic-Microwave cooking Condition
N.O.
MONITOR N.C.
SWITCH
ASYMMETRIC
RECTIFIER
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
N.O.
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
COM.
CONVECTION HEATING ELEMENT
N.O .
N.C.
TURNTABLE MOTOR
COM.
FAN MOTOR
MONITORED LATCH SWITCH
FM
STOP
SWITCH
CM
CONVECTION MOTOR
TTM
E1
CM
H.V. RECTIFIER
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
L
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
CONVECTION HEATING ELEMENT
FAN MOTOR
FM
D3
DM
DAMPER MOTOR
N.O.
COM.
N.O.
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
MAG.
THERMAL
CUT-OUT
CONVECTION MOTOR
TURNTABLE MOTOR
OL
OVEN LAMP
D1
RY7
AH SENSOR A7
(Only for R-963M)
RY6
OL
RY4
D3
DM
DAMPER MOTOR
F3
F2
E3
RY8
OVEN LAMP
RY7
D1
CONTROL
UNIT
N.O.
E7
RY4
AH SENSOR A7
(Only for R-963M)
RY3
F1
A5
B1
B2
B4
B3
C1
C3
RY5
F3
COM.
N.O.
CONV.
THERMAL
CUT-OUT
A3
E5
4700p/ 250V
680 k/ 0.5W
CONTROL
UNIT
F2
RY2
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
E1
GRILL
THERMAL
CUT-OUT
4700p/ 250V
10M/ 0.5W
FUSE 20A
LIVE
BRN/15
230 - 240V ~ 50Hz
NOISE SUPPRESSION COIL
0.22 /250V
EARTH
G-Y/15
RY3
F1
E3
RY1
A5
E7
FUSE
F8A
NOISE
FILTER
N
DAMPER
THERMISTOR SWITCH
B1
E5
MAG.
THERMAL
CUT-OUT
L
NEUTRAL
BLU/15
RY2
B2
10M/ 0.5W
4700p/ 250V
680 k/ 0.5W
LIVE
FUSE 20A
NOISE SUPPRESSION COIL
0.22 /250V
EARTH
G-Y/15
BRN/15
230 - 240V ~ 50Hz
RY1
B4
B3
C1
C3
A3
4700p/ 250V
NEUTRAL
BLU/15
CONV.
THERMAL
CUT-OUT
FUSE
F8A
NOISE
FILTER
SCHEMATIC DIAGRAMS
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. " . O" APPEARS ON DISPLAY.
MONITOR N.C.
SWITCH
ASYMMETRIC
RECTIFIER
Figure O-1(c) Oven Schematic-OFF Condition after the oven door is closed.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. STRAT KEY TOUCHED.
DAMPER
THERMISTOR SWITCH
RY5
R-953/963M - 34
MONITORED LATCH SWITCH
RY6
STOP
SWITCH
COM.
N.O .
N.C.
COM.
Figure O-4 Oven Schematic-Convection Condition
MONITOR N.C.
SWITCH
N.O.
ASYMMETRIC
RECTIFIER
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
N.O.
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
COM.
CONVECTION HEATING ELEMENT
TURNTABLE MOTOR
N.O .
N.C.
TTM
RY8
FM
COM.
FAN MOTOR
MONITORED LATCH SWITCH
CM
STOP
SWITCH
CONVECTION MOTOR
RY6
TTM
E1
H.V. RECTIFIER
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
L
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
CONVECTION HEATING ELEMENT
FAN MOTOR
FM
D3
DM
DAMPER MOTOR
N.O.
COM.
N.O.
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
MAG.
THERMAL
CUT-OUT
CM
CONVECTION MOTOR
D1
TURNTABLE MOTOR
OL
OVEN LAMP
AH SENSOR A7
(Only for R-963M)
RY7
OL
RY4
D3
DM
DAMPER MOTOR
F3
F2
E3
RY8
OVEN LAMP
RY7
D1
N.O.
E7
RY4
AH SENSOR A7
(Only for R-963M)
CONTROL
UNIT
F3
RY3
F1
A5
B1
B2
B4
B3
C1
C3
RY5
F2
COM.
N.O.
CONV.
THERMAL
CUT-OUT
A3
E5
4700p/ 250V
680 k/ 0.5W
CONTROL
UNIT
F1
RY2
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
E1
RY1
RY3
A5
E3
GRILL
THERMAL
CUT-OUT
4700p/ 250V
DAMPER
THERMISTOR SWITCH
B1
E7
MAG.
THERMAL
CUT-OUT
FUSE
F8A
10M/ 0.5W
FUSE 20A
LIVE
BRN/15
230 - 240V ~ 50Hz
NOISE SUPPRESSION COIL
0.22 /250V
EARTH
G-Y/15
RY2
B2
E5
4700p/ 250V
680 k/ 0.5W
NOISE
FILTER
N
NEUTRAL
BLU/15
RY1
B4
B3
C1
10M/ 0.5W
L
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. CONVECTION TEMPERATURE SELECTED.
4. STRAT KEY TOUCHED.
C3
A3
4700p/ 250V
LIVE
FUSE 20A
NOISE SUPPRESSION COIL
0.22 /250V
EARTH
G-Y/15
BRN/15
230 - 240V ~ 50Hz
CONV.
THERMAL
CUT-OUT
FUSE
F8A
NOISE
FILTER
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. GRILL MODE SELECTED.
4. STRAT KEY TOUCHED.
GRILL
THERMAL
CUT-OUT
N
NEUTRAL
BLU/15
SCHEMATIC DIAGRAMS
NOTE: The convection heater will be operational as back up until the oven cavity
temperature rises to 220 ˚C.
MONITOR N.C.
SWITCH
ASYMMETRIC
RECTIFIER
Figure O-3 Oven Schematic-Grill cooking Condition (TOP GRILL mode)
NOTE: When the convection temperature 160 - 250 ˚C are selected, the grill heating
element will be energized as back up.
GRILL
THERMAL
CUT-OUT
N
DAMPER
THERMISTOR SWITCH
RY5
R-953/963M - 35
MONITORED LATCH SWITCH
RY6
STOP
SWITCH
COM.
N.O .
N.C.
COM.
MONITOR N.C.
SWITCH
N.O.
Figure O-5(b) Oven Schematic-Dual cooking Condition (Microwave and Grill)
MAGNETRON
N.O.
ASYMMETRIC
RECTIFIER
H.V. RECTIFIER
CAPACITOR
1.16 F
AC2100V
HIGH VOLTAGE
TRANSFORMER
COM.
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
N.O .
N.C.
TURNTABLE MOTOR
TTM
RY8
FM
MONITORED LATCH SWITCH
FAN MOTOR
COM.
CM
STOP
SWITCH
CONVECTION MOTOR
RY6
TTM
E1
CM
H.V. RECTIFIER
CAPACITOR
1.16 F
AC2100V
GRILL HEATING ELEMENTS
L
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
CONVECTION HEATING ELEMENT
FAN MOTOR
FM
D3
DM
DAMPER MOTOR
N.O.
COM.
N.O.
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
MAG.
THERMAL
CUT-OUT
CONVECTION MOTOR
D1
TURNTABLE MOTOR
OL
OVEN LAMP
AH SENSOR A7
(Only for R-963M)
RY7
OL
RY4
D3
DM
DAMPER MOTOR
F3
F2
E3
RY8
OVEN LAMP
RY7
D1
CONTROL
UNIT
N.O.
E7
4700p/ 250V
680 k/ 0.5W
RY4
AH SENSOR A7
(Only for R-963M)
RY3
F1
A5
B1
B2
B4
B3
C1
C3
A3
E5
RY5
F3
COM.
N.O.
CONV.
THERMAL
CUT-OUT
10M/ 0.5W
FUSE 20A
LIVE
BRN/15
230 - 240V ~ 50Hz
NOISE SUPPRESSION COIL
0.22 /250V
CONTROL
UNIT
F2
RY2
COM.
N.O.
COM.
N.O.
COM.
A1
T/C TRANSFORMER
E1
GRILL
THERMAL
CUT-OUT
4700p/ 250V
DAMPER
THERMISTOR SWITCH
A5
E3
FUSE
F8A
NOISE
FILTER
N
EARTH
G-Y/15
RY3
F1
E7
MAG.
THERMAL
CUT-OUT
L
NEUTRAL
BLU/15
RY2
B1
E5
RY1
B2
10M/ 0.5W
4700p/ 250V
680 k/ 0.5W
LIVE
FUSE 20A
NOISE SUPPRESSION COIL
0.22 /250V
EARTH
G-Y/15
BRN/15
230 - 240V ~ 50Hz
RY1
B4
B3
C1
C3
A3
4700p/ 250V
NEUTRAL
BLU/15
CONV.
THERMAL
CUT-OUT
FUSE
F8A
NOISE
FILTER
SCHEMATIC DIAGRAMS
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. DUAL CONV./GRILL PAD TOUCHED ONCE.
4. CONVECTION TEMPERATURE SELECTED.
5. MICROWAVE POWER LEVEL SELECTED.
6. STRAT KEY TOUCHED.
ASYMMETRIC
RECTIFIER
MONITOR N.C.
SWITCH
Figure O-5(a) Oven Schematic-Dual cooking Condition (Microwave and Convection)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. DUAL CONV./GRILL PAD TOUCHED TWICE.
4. MICROWAVE POWER LEVEL SELECTED.
5. STRAT KEY TOUCHED.
2
1
BLK
AH SENSOR
GRILL
HEATING ELEMENT
GRN
CONTROL PANEL
OVEN LAMP
THERMAL
CUT-OUT(GRILL)
GRN
1
RED
2
GRN
3
BRN
4
BLU
STOP
SWITCH
GRN
NO
COM
1
1
CN-1
WHT
WHT
WHT
WHT
WHT
W
H
T
G–Y
B
L
K
BRN
BLU
5
15 CN-2
4
12
3
RED
N
L
2
1
CN-B
1
WH-1
15
R-953/963M - 36
1
CN-5
CN-C
5
YLW
BLK
N.C.
YLW
WHT
RED
RED
WHT
WHT
WHT
CONVECTION
MOTOR
RED
BLK
CONVECTION
HEATING ELEMENT
RY8
CN-E
BLK
F2
COM
1
RY1
RED
NOISE FILTER
WHT
COM.
BRN
RED
MONITOR
SWITCH
WHT
RY2
N.O.
BLU
DAMPER
MOTOR
WHT
BLK
YLW
3
DAMPER
SWITCH
N.O.
WHT
WH-2
4
TL
TP
4
WHT
WHT
WHT
RY3
RY7
YLW
1
MONITORED
LATCH
SWITCH
N.C.
BLK
RY4
RY6
RED
7
BLK
CN-A
RY5
RED
1
RED
6
5
ORG
3
BRN
T/C
TRANSFORMER
7
BLU
WHT
BLK
RED
BLK
RED
RED
YLW
FAN
MOTOR
HIGH VOLTAGE COMPONENTS
MAGNETRON
H.V.WIRE B
YLW
6
5
WHT
3
1
YLW
RED
RED
ASYMMETRIC
RECTIFIER
Long Black Tube
BLK
2
2
1
RED
4
4
WHT
YLW
CN-A
CN-E
7
BLK
RED
RED
THERMAL
CUT-OUT(CONV.)
WHT
THERMAL
CUT-OUT(MAG)
TURNTABLE
MOTOR
WHT
Red wire
BLK
HIGH VOLTAGE
TRANSFORMER
Figure S-1. Pictrorial Diagram
H.V.
RECTIFIER
1
BLK
F1
1
Black Tube
H.V.
CAPACITOR
CN-G
BLK
RED
CN-D
CN-F
POWER SUPPLY
CORD
EARTH
CN-B
NEUTRAL
BLK
RED WHT
3
LIVE
CN-F
3 WHT
2 RED
1 BLK
THERMISTOR
PICTORIAL DIAGRAM
CN-C
POWER UNIT CIRCUIT
C1
C3
D10
S1NB10
–
b
(J1)
E7
A3
–
Q1 2SB1238
R5 3.3k
WH1-3
GND
WH1-6
VC
WH1-9
BUZZER
WH2-2
VA
WH1-10
VR
WH1-5
WH1-11
INT
POWER
CONTROL
R3 680 1w
c
D5
SP1
A5
D6
RY6
FAN MOTOR
OVEN
THERMISTOR
R4 510 1w
RY5
(J2)
AC230-240V
50Hz
DOOR OPEN
CONTACT
A1
+
WH1-4
C4 10µ/35v
a
+
C3
C1
VRS1
10G471K
d
E5
R1 2.4k
E3
ZD1
HZ16-1
GND
E1
C2 1000µ/35v
T1
WH1-8
A7
CONVECTION
MOTOR
D7
RY7
WH1-7
D1
D8
RY8
DAMPER
MOTOR
D3
NC
D5
OVEN LAMP
TURNTABLE
MOTOR
NO
WH2-4
R6 130 1w
WH2-3
D1
RY1
COM
RY4
NO
WH1-12
D4
CONVECTION
HEATING
ELEMENT
COM
RY3
NO
WH1-13
D3
GRILL
HEATING
ELEMENT
COM
RY2
WH1-14
Q3
KRC243M
STOP
SWITCH
Q2
2SB1238
B4
+
–
ZD2
HZ20-1
DAMPER
SWITCH
R2
1.5k
COM
B3
B2
B1
NOTE 1.
C5
10µ/35v
NO
D2
HIGH VOLTAGE
TRANSFORMER
WH1-15
WH2-1
DAMPER
SWITCH
WH1-2
NC
WH1-1
STOP
SWITCH
NOTE 2.
: IF NOT SPECIFIED, 1/4W ± 5%
: IF NOT SPECIFIED, 0.1µF / 50V
: IF NOT SPECIFIED, 1SS270A
WH1-n 15P WIRE HARNESS
WH2-n 4P WIRE HARNESS
Figure S-2. Power Unit Circuit
R-953/963M - 37
(A)
C2-4
Q21
DTA143EKA
See Schm.
Diag. C
C2-3
(N)
(D)
Q23DTA143EKA
C1-8
(E)
C1-7
(M)
(K)
A0
A1
A2
GND
(G)
HIGH
VOLTAGE
TRANSFORMER
C1-14
C100
C1-13
Q26
DTA123JKA
IC4
AT24C01A
(H)
C1-1
C1-2
DAMPER
SWITCH
C2-1
OVEN
THERMISTOR
C1-4
Q27
DTA123JKA
(K)
D20
D21
Q28
DTA123JKA
R31 15k
D30
R56
1M
CF1
CST4.00MGW
NOTE :
R85 15k
R81 0Ω
(P)
R82
18kF
(M)
: IF NOT SPECIFIED 1/10W ± 5%
: IF NOT SPECIFIED 1SS355
: IF NOT SPECIFIED 0.01µF/25V
(R)
R80 510kF
R58
4.7k
(Q)
C83
R30
4.7k
NC
VCC
TS
SCL
SDA
R57 47k
C1-12
GRILL
HEATING
ELEMENT
STOP SWITCH
Q25
DTA143EKA
C1-15
C80
CONVEC
HEATING
ELEMENT
(F)
(J18)
(J20)
(J22)
(J19) 4.7k
(J21) 4.7k
(J23) 4.7k
C20
0.1µ
/50v
C30
OVEN LAMP
TURNTABLE
MOTOR
R83 15k
Figure S-3(a). CPU Unit Circuit (R-953(SL)M/(W)M)
See
Fig. S-4
60 P32
P33
P34
P35
P36
55 P37
P00
P01
P02
P03
50 P04
P05
P06
P07
P10
45 P11
P12
P13
P14
41 P15
IC1
IXA034DR
P44
INT1
INT0
CNVSS
RESET 25
P41
P40
XIN
XOUT
VSS 30
Q24
DTA143EKA
R84
4.7k
R-953/963M - 38
AN0 1
P77
P76
P75
P74 5
P73
P72
P71
P70
P57 10
P56
P55
P54
P53
P52 15
P51
P50
P47
P46
P45 20
(P)
(B)
(A)
Q20
DTA143EKA
P27
P26
P25
P24
P23 35
P22
P21
P20
P17
P16 40
C1-11
(B)
CONVEC
MOTOR
(J16)
(R)
(Q)
(H)
(G)
(F)
(E)
(D)
C1-9
(I)
C2-2
BUZZER
R55 4.7k
VA
(N)
80 AN1
AN2
AN3
AN4
AN5
75 AN6
AN7
AVSS
VREF
VCC
70 P80
P81
P82
P83
P84
65 P85
P86
P87
P30
61 P31
C1-10
FAN
MOTOR
(J17) 4.7k
(J14) 10k
(J15) 4.7k
Q30
DTA143EKA
LD19 LD18 LD17 LD16 LD15
VR
DAMPER
MOTOR
GND
C1-6
LD10 LD11 LD12 LD13 LD14
POWER
CONTROL
C11 0.1µ/50v
(J12)
(J13) 4.7k
(J11) 18kF (J10)16kF
C14
(I)
R11
4.7k
R10
1k
INT0
Q10
2SA1037AK
C16
0.1µ
/50v
C13
Q2
2SB1238
(J)
ZD10
UDZ4.3B
C15
C12
0.1µ
/50v
Q11
DTA143EKA
(J)
VC
D6
R12
4.7k
–
D5
R5
4.7k
+
R4 27
C1-3
C10 47µ/16v
C1-5
GND
See
Fig. S-5(a)
CONTROL PANEL UNIT (R-953(SL)M
INT
Q30
DTA143EKA
C52
(A)
Q20
DTA143EKA
IC2 BA4558F
5
(B)
R92
1.8kF
C2-3
8
4
R94
10k
See Schm.
Diag. C
R97 47k
R98 620k
R99 300k
(N)
R100 150kF
Q23DTA143EKA
R101 75kF
R102 37.4kF
Q24
DTA143EKA
HIGH
VOLTAGE
TRANSFORMER
C1-14
C100
C1-13
C1-1
C1-2
Q27
DTA123JKA
(K)
D20
D21
Q28
DTA123JKA
R31 15k
D30
OVEN
THERMISTOR
(J16)
F-3
R81 0Ω
C1-4
C80
R82
18kF
R85 15k
(P)
: IF NOT SPECIFIED 1/10W ± 5%
: IF NOT SPECIFIED 1SS355
: IF NOT SPECIFIED 0.01µF/25V
(R)
AH SENSOR
R83 15k
Figure S-3(b). CPU Unit Circuit (R-963(SL)M/(W)M)
(J18)
(J20)
(J22)
(J19) 4.7k
(J21) 4.7k
(J23) 4.7k
(B)
(A)
(H)
(G)
(F)
(E)
(D)
CN-F
F-2
NOTE :
(M)
R80 510kF
R56
1M
(Q)
C83
C2-1
R58
4.7k
CF1
CST4.00MGW
F-1
DAMPER
SWITCH
VCC
TS
SCL
SDA
IC4
AT24C01A
(H)
R30
4.7k
NC
A0
A1
A2
GND
(G)
Q26
DTA123JKA
R57 47k
C1-12
GRILL
HEATING
ELEMENT
STOP SWITCH
Q25
DTA143EKA
C1-15
C30
CONVEC
HEATING
ELEMENT
(J17) 4.7k
(J14) 10k
(J15) 4.7k
(K)
(F)
C20
0.1µ
/50v
(I)
C1-7
(M)
See
Fig. S-4
60 P32
P33
P34
P35
P36
55 P37
P00
P01
P02
P03
50 P04
P05
P06
P07
P10
45 P11
P12
P13
P14
41 P15
IC1
IXA034DR
R55 4.7k
C1-8
(E)
OVEN LAMP
TURNTABLE
MOTOR
C11 0.1µ/50v
(J12)
AN0 1
P77
P76
P75
P74 5
P73
P72
P71
P70
P57 10
P56
P55
P54
P53
P52 15
P51
P50
P47
P46
P45 20
(P)
R93 360kF
R91 3.32kD
CONVEC
MOTOR
(J13) 4.7k
7
6
(D)
R84
4.7k
R-953/963M - 39
R90 330 1w
Q21
DTA143EKA
C2-4
D90
MA152WA
C90
0.1µ/50v
C1-11
(R)
(Q)
C93
80 AN1
AN2
AN3
AN4
AN5
75 AN6
AN7
AVSS
VREF
VCC
70 P80
P81
P82
P83
P84
65 P85
P86
P87
P30
61 P31
C1-9
P44
INT1
INT0
CNVSS
RESET 25
P41
P40
XIN
XOUT
VSS 30
C2-2
BUZZER
(J)
VA
R95 47k
C1-10
(N)
R96 3.57kD
VR
1
2
P27
P26
P25
P24
P23 35
P22
P21
P20
P17
P16 40
LD19 LD18 LD17 LD16 LD15
FAN
MOTOR
R11
4.7k
IC2 1/2
3
DAMPER
MOTOR
GND
C1-6
LD10 LD11 LD12 LD13 LD14
POWER
CONTROL
(J11) 18kF (J10)16kF
(I)
C16
0.1µ
/50v
INT0
C14
R10
1k
(J)
C13
Q2
2SB1238
Q10
2SA1037AK
ZD10
UDZ4.3B
C15
C12
0.1µ
/50v
Q11
DTA143EKA
C91
VC
D6
R12
4.7k
–
D5
R5
4.7k
+
R4 27
C1-3
C10 47µ/16v
C1-5
GND
See
Fig. S-5(b)
CONTROL PANEL UNIT (R-963(SL)M
INT
GND
IC1-55(P37)
IC1-56(P36)
IC1-57(P35)
IC1-58(P34)
IC1-59(P33)
IC1-60(P32)
IC1-61(P31)
IC1-62(P30)
IC1-63(P87)
IC1-64(P86)
D7
D6
D5
D4
D3
D2
D1
D0
INT
MAIN
IC1-66(P84)
IC1-65(P85)
IC1-54(P00)
SUB
IC1-53(P01)
GND
RESET
VC
VC
R134 15k
R128 4.7k
C123 0.1µ/50v
C122 0.1µ/50v
C121 0.1µ/50v
C120 0.1µ/50v
25
51
50
VDD
NC
NC
RESET
TEST
VREF
R03
R02
R01
R00
P13
P12
P11
P10
P03
P02
P01
P00
K03
K02
K01
K00
NC
NC
NC
26
IC3
IXA044DR
Figure S-4. Indicator Circuit
C125
0.1µ/50v
R131 4.7k
R130 4.7k
C124 0.1µ/50v
R129 4.7k
R127 4.7k
R126 4.7k
R125 4.7k
R124 4.7k
R123 4.7k
R122 4.7k
R121 4.7k
R120 4.7k
R133
510k
R132
33k
C126 0.1µ/50v
C127
0.1µ/50v
OSC4
OSC3
VD1
OSC2
OSC1
VSS
BZ
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
VC1
VC2
VC3
VC4
VC5
CF
CE
CD
CC
CB
CA
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG39
SEG38
SEG37
SEG36
SEG35
C129
0.1µ/50v
R-953/963M - 40
C128
0.1µ/50v
100
75
76
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
1
(56)
(1)
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
INDICATOR CIRCUIT
COOK
R69 15k
IC1-7(P72)
IC1-8(P71)
IC1-46(P10)
R60 15k
IC1-45(P11)
R61 15k
IC1-44(P12)
R62 15k
IC1-43(P13)
R63 15k
IC1-42(P14)
R64 15k
IC1-41(P15)
G4
G3
G2
G1
ROAST
POULTRY
ROAST
PORK
STEAK/
CHOPS
CHICKEN
PORTIONS
ROAST
BEEF/
LAMB
10 sec.
1 min.
10 min.
MINCED
MEAT
AUTO
COOK
MORE
LESS
DUAL
CONV./
GRILL
C60 330pF/50v
C61 330pF/50v
C62 330pF/50v
C63 330pF/50v
R72 100k
R73 100k
R-953/963M - 41
R74 100k
IC1-9(P70)
R65 15k
G5
G12
R71 15k
R75 100k
IC1-40(P16)
G6
G11
R70 15k
G7
G9
R68 15k
IC1-6(P73)
G8
G10
5597-12CPB
R66 15k
IC1-39(P17)
R67 15k
: IF NOT SPECIFIED 1/10W ± 5%
VC
GND
IC1-77(AN4)
IC1-18(P47)
IC1-22(INT1)
Figure S-5(a). Key Unit Circuit (R-953(IN)M/(W)M)
GRILL
AUTO
START
CLOCK
START
AUTO
MINUTE
Kg / Lb
UP
MICRO.
POWER
DOWN
KITCHEN
TIMER
CONV.
(˚C)
STOP
CLEAR
KEY UNIT CIRCUIT (R-953(SL)M
: IF NOT SPECIFIED 0.01µF/25V
ROAST
PORK
STEAK/
CHOPS
CHICKEN
PORTIONS
MINCED
MEAT
CANNED
FOOD
FRESH
VEG.
MORE
LESS
FROZEN
READY
MEALS
AUTO
START
CLOCK
ROAST
BEEF/
LAMB
CHILLED
READY
MEALS
START
AUTO
MINUTE
RICE/
PASTA
STOP
CLEAR
Kg / Lb
DUAL
CONV./
GRILL
VC
GND
IC1-77(AN4)
IC1-18(P47)
IC1-22(INT1)
Figure S-5(b). Key Unit Circuit (R-963(IN)M/(W)M)
IC1-46(P10)
R60 15k
IC1-45(P11)
R61 15k
IC1-44(P12)
ROAST
POULTRY
R62 15k
IC1-43(P13)
R63 15k
IC1-42(P14)
R64 15k
IC1-41(P15)
G4
C60 330pF/50v
C61 330pF/50v
C62 330pF/50v
C63 330pF/50v
R72 100k
R73 100k
R-953/963M - 42
R74 100k
IC1-9(P70)
R65 15k
G5
G12
R71 15k
R75 100k
IC1-40(P16)
G6
G11
R70 15k
IC1-8(P71)
R66 15k
IC1-39(P17)
R69 15k
IC1-7(P72)
G7
G9
R68 15k
IC1-6(P73)
G8
G10
R67 15k
: IF NOT SPECIFIED 1/10W ± 5%
G3
G2
G1
10 sec.
1 min.
10 min.
FRESH
FISH
GRILL
AUTO
COOK
UP
MICRO.
POWER
DOWN
KITCHEN
TIMER
CONV.
(˚C)
info
KEY UNIT CIRCUIT (R-963(SL)M
: IF NOT SPECIFIED 0.01µF/25V
PRINTED WIRING BOARD POWER UNIT
DIP
1
15
1
4
1
CN - B
WH1
WH2
1
4
D3
B
D1
MICRO
RY2
RY1
OL:TTM
DAMP
R3
B
ZD1
D8
E Q1
R1
CN - D 1
D7
D6
7
C4
E R6
Q2
3
6
C3
ROTI
5
RY9
R4
1 CN - C
4
5
Q3
D2
8
3
SP1
R5
C5
E
B
R2
D9
ZD2
2
RY8
CF
1
D4
C2
RY3
TH
RY7
C1
D5
D10
CH:BH
RY4
9
(J1)
CN - A
7
CN - E
FM
RY6
(J2)
1
VRS1
POWER CONT
Figure S-6. Printed Wiring Board of Power Unit
R-953/963M - 43
RY5
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure. / The parts marked "*" are used in
voltage more than 250V. / "§" Mark: Spare parts delivery section
REF. NO.
PART NO.
§
DESCRIPTION
Q'TY CODE
ELECTRIC PARTS
*
*
∆*
*
1- 1
1- 2
1- 3
1- 4
1- 5
1- 6
1- 7
1- 8
1- 9
1-10
1-11
1-12
1-13
1-14
1-15
1-16
1-17
1-18
1-19
1-20
1-21
1-22
1-23
1-24
1-25
QSW-MA133WRE0
QSW-MA131WRE0
QSW-MA133WRE0
QSW-MA131WRE0
QFS-BA009WRE0
QFS-CA025WRE0
RTHM-A098WRE0
RTHM-A109WRE0
RTHM-A109WRE0
RC-QZA219WRE0
FH-DZA035WRE0
RV-MZA264WRE0
RTRN-A016URE1
RHET-A231WRZZ
RHET-A233WRZZ
RMOTEA361WRE0
RMOTEA373WRE0
RMOTDA227WRE0
RMOTDA191WRE0
RLMPTA066WRE0
QACCBA004URE1
FPWBFA309WRE2
RTRN-A529WRE0
FH-HZA075WRE0
FDTCTA208WRKZ
U
U
U
U
U
U
U
J
J
U
U
U
U
U
U
U
U
U
J
U
U
U
U
U
U
Monitored latch switch
Stop switch
Monitor switch
Damper switch
Fuse 20A
Fuse F8A
Thermal cut-out 125˚C(MG)
Thermal cut-out 170˚C (GRILL)
Thermal cut-out 170˚C (CONV.)
High voltage capacitor
High voltage rectifier assembly
Magnetron
High voltage transformer
Grill heating element
Convection heating element
Fan motor
Convection motor
Turntable motor
Damper motor
Oven lamp
Power supply cord
Noise filter
TC transformer
Thermistor
AH sensor assembly [R-963(SL)M/(W)M]
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
AN
AK
AN
AG
AC
AC
AH
AG
AG
AT
AP
BK
BE
AQ
AU
AT
AV
AU
AS
AK
AT
AT
AV
AN
AW
U
U
U
U
U
Back plate
Outer case cabinet [R-963(SL)M, R-953(SL)M]
Outer case cabinet [R-963(W)M, R-953(W)M]
Foot
Base plate
1
1
1
2
1
AU
AU
AU
AA
AT
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
Power unit
4-pin connector (CN-A)
4-pin connector (CN-B)
2-pin connector (CN-C)
3-pin connector (CN-D)
4-pin connector (CN-E)
15-pin wire harness (WH-1)
4-pin wire harness (WH-2)
Capacitor
0.1 uF
50V
Capacitor
1000 uF
35V
Capacitor
0.1 uF
50V
Capacitor
10 uF
35V
Diode (1SS270A)
Diode bridge (S1NB10)
Transistor (2SB1238)
Transistor (KRC243M)
Resistor
2.4K ohm
1/4W
Resistor
1.5K ohm
1/4W
Resistor
680 ohm
1W
Resistor
510 ohm
1W
Resistor
3.3K ohm
1/4W
Resistor
130 ohm
1W
Relay (DU18D1-1P(M)-R)
Relay (DU18D1-1P(M)-R-S)
Relay (DU24D1-1P(M)-R)
Relay (OJ-SH-124LM)
Buzzer (PKM22EPT)
Varistor (10G471K)
Zener diode (HZ16-1)
Zener diode (HZ20-1)
CPU unit [R-963(SL)M]
CPU unit [R-963(W)M]
CPU unit [R-953(SL)M]
CPU unit [R-953(W)M]
LED holder
LCD sheet
Key unit [R-953(SL)M]
Key unit [R-953(W)M]
1
1
1
1
1
1
1
1
1
1
1
2
8
1
2
1
1
1
1
1
1
1
1
1
2
4
1
1
1
1
1
1
1
1
1
1
1
1
BF
AD
AM
AB
AC
AC
AE
AC
AB
AE
AB
AB
AA
AE
AD
AB
AA
AA
AB
AB
AA
AB
AG
AG
AG
AG
AG
AD
AB
AB
BC
BC
BC
BC
AM
AL
AS
AS
CABINET PARTS
22222-
1
2
2
3
4
GCABDA005URP0
GCABUA038URP0
GCABUA037URP0
GLEGPA028WRE0
GDAI-A003URP0
CONTROL PANEL PARTS
3- 1
3- 1A
3- 1B
3- 1C
3- 1D
3- 1E
3- 1F
3- 1G
C1
C2
C3
C4-5
D1-8
D10
Q1-2
Q3
R1
R2
R3
R4
R5
R6
RY1
RY2
RY3-4
RY5-8
SP1
VRS1
ZD1
ZD2
3- 2
3- 2
3- 2
3- 2
3- 3
3- 4
3- 5
3- 5
DPWBFA129URK0
QCNCMA412DRE0
QCNCMA433DRE0
QCNCMA410DRE0
QCNCMA430DRE0
QCNCMA230DRE0
FW-VZA266DREZ
FW-VZA267DREZ
RC-KZA087DRE0
VCEAG31VW108M
RC-KZA087DRE0
VCEAG31VW106M
VHD1SS270A/-1
RSRCDA013DRE0
VS2SB1238//-3
VSKRC243M//-3
VRD-B12EF242J
VRD-B12EF152J
VRS-B13AA681J
VRS-B13AA511J
VRD-B12EF332J
VRS-B13AA131J
RRLY-A117DRE0
RRLY-A122DRE0
RRLY-A113DRE0
RRLY-A080DRE0
RALM-A014DRE0
RH-VZA034DRE0
VHEHZ161///-1
VHEHZ201///-1
DPWBFC035WRKZ
DPWBFC035WRKZ
DPWBFC036WRKZ
DPWBFC036WRKZ
LHLD-A010URF0
PSHEPA647WRE0
FUNTKC101URE0
FUNTKC101URE0
R-953/963M - 44
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure. / The parts marked "*" are used in
voltage more than 250V. / "§" Mark: Spare parts delivery section
REF. NO.
333333333333-
5
5
6
7
7
7
7
8
8
8
8
9
PART NO.
§
FUNTKC102URE0
FUNTKC103URE0
GCOVHA023URF0
HDECQK001URF0
HDECQK001URF0
HDECQS001URT0
HDECQS001URT0
HPNLCS016URT0
HPNLCS016URT0
HPNLCW052URF0
HPNLCW052URF0
XEPSD30P10XS0
U
U
U
U
U
U
U
U
U
U
U
U
Key unit [R-963(W)M]
Key unit [R-963(SL)M]
Key fixing frame
Panel sash [R-953(SL)M]
Panel sash [R-963(SL)M]
Panel sash [R-953(W)M]
Panel sash [R-963(W)M]
Control panel frame [R-953(SL)M]
Control panel frame [R-963(SL)M]
Control panel frame [R-953(W)M]
Control panel frame [R-963(W)M]
Screw : 3mm x 10mm
DESCRIPTION
Q'TY CODE
1
1
1
1
1
1
1
1
1
1
1
2
AS
AS
AL
AR
AR
AR
AR
AU
AU
AU
AU
AA
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
J
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
Magnetron guide H
Heat cover cushion
Magnetron guide V
Oven cavity
Damper cam
Damper angle
Damper
VJC damper cushion
Air intake duct
Exhaust duct [R-953(SL)M/(W)M]
Exhaust duct [R-963(SL)M/(W)M]
Partition plate B
Air duct
Grill heater angle
Earth plate
Grill reflector
Convection heater angle
Convection motor angle
Cooling fan
Convection duct
Pipe
Air separate angle A
Air separate angle B
Air separate angle C
Air separate angle D
Rear heat cover
Convection heater angle A
Heat insulatiing material
Air separate angle E
Air separate angle F
Convection fan
Latch hook
Fan duct
Fan blade
Bottom heater cover
Chassis support
Coupling
Waveguide cover
Heat insulatiing material
Lamp filter
O-ring
Heater cover right
Vibration proof cushion
Capacitor holder
Rear barrier
Cavity support bracket
1
1
1
1
1
1
1
1
1
1
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
1
1
1
1
1
1
1
AN
AB
AG
BL
AD
AC
AD
AC
AE
AM
AM
AD
AG
AB
AB
AN
AB
AE
AD
AB
AE
AC
AC
AC
AC
AM
AM
AL
AC
AC
AD
AG
AL
AF
AB
AB
AP
AC
AM
AB
AB
AM
AA
AD
AH
AG
U
U
U
U
U
U
U
U
U
U
U
Door panel assembly [R-963(SL)M, R-953(SL)M]
Door panel assembly [R-963(W)M]
Door panel assembly [R-953(W)M]
Choke cover
Door panel
Door frame [R-963(SL)M, R-953(SL)M]
Door frame [R-963(W)M, R-953(W)M, R-953(W)M]
Door handle [R-963(SL)M, R-953(SL)M]
Door handle [R-963(W)M]
Latch head
Latch spring
1
1
1
1
1
1
1
1
1
1
1
BN
BN
BN
AL
BH
AT
AT
AD
AD
AG
AC
OVEN PARTS
∆
∆
*
*
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
4- 8
4- 9
4-10
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
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
PSKR-A011URP0
PCUSUA026URP0
PSKR-A009URP0
DOVN-A018URK0
MCAMPA001URF0
LANGTA009URP0
PFTA-A001URF0
PCUSUA025URP0
PDUC-A011URF0
PDUC-A014URP0
PDUC-A015URP0
PSKR-A010URP0
PDUC-A012URP0
LANGQA017URP0
QTANNA001URP0
PREFHA001URP0
LANG-A054WRP0
LANGQA308WRP0
NFANMA003URP0
PDUC-A013URP0
PPIPFA013WRE0
PSKR-A002URP0
PSKR-A003URP0
PSKR-A004URP0
PSKR-A005URP0
PSLDHA001URP0
LANGQA018URP0
PFPF-A002URE0
PSKR-A006URP0
PSKR-A007URP0
NFANMA011WRP0
PHOK-A0002URF0
PDUC-A016URF0
NFANJA038WRE0
GCOVHA002URP0
LANGFA001URP0
NCPL-A040WRE1
PCOVPA309WRE0
PFPF-A003URE0
PFILWA001URP0
PPACGA101WRE0
PSLDHA002URP0
PSPAGA001WRE0
LBNDKA111WRP0
PSKR-A308WRF0
LANGFA002URP0
DOOR PARTS
∆
∆
∆
∆
∆
∆
5- 1
5- 1
5- 1
5-1-1
5-1-2
5-1-3
5-1-3
5-1-4
5-1-4
5-1-5
5-1-6
CDORFS013URK0
CDORFW015URK0
CDORFW017URK0
GCOVHA024URF0
DDORFA001URK0
GWAKPS020URR0
GWAKPW031URF0
JHNDPK001URF0
JHNDPS001URT0
LSTPPA017URF0
MSPRTA197WREZ
R-953/963M - 45
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure. / The parts marked "*" are used in
voltage more than 250V. / "§" Mark: Spare parts delivery section
REF. NO.
PART NO.
§
5-1-7
5-1-7
5-1-8
5- 2
PGLSPA023URR0
PGLSPA022URR0
XEBSD30P06000
LSTPPA018URF0
U
U
U
U
DESCRIPTION
Front door glass[R-963(SL)M,R-953(SL)M,R-953(W)M]
Front door glass [R-963(W)M,
Screw : 3mm x 6mm
Door stopper
Q'TY CODE
1
1
9
1
AW
AW
AA
AB
1
1
2
1
1
1
1
1
1
1
1
1
AS
AZ
AQ
AQ
AP
AS
AX
AW
AH
AE
AC
AM
2
1
8
1
1
1
2
2
2
8
1
4
6
4
9
2
28
4
4
4
AA
AA
AB
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
MISCELLANEOUS
*
6- 1
6- 2
6- 3
6- 4
6- 5
6- 6
6- 7
6- 8
6- 9
6-10
6-11
6-12
FROLPA060WRK0
NTNT-A040WRE0
FAMI-A003URK0
FAMI-A001URK0
FAMI-A002URK0
TINS-A208URR0
TCADCA011URR0
FW-VZA073URE1
FW-VZA074URE0
QW-QZA001URE0
TCAUHA001WRR1
TINS-A211URR0
U
U
U
U
U
U
U
U
U
U
U
U
Roller stay
Turntable tray
Square shelf
High rack
Low rack
Operation manual
Cookery book
Main harness
Stop switch harness
High voltage wire B
Caution label
Quick start guide
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
7-13
7-14
7-15
7-16
7-17
7-18
7-19
XHPSD40P08K00
XWWSD50-06000
XCBWW30P06000
XNEUW40-32000
XRESE40-06000
XWSUW40-10000
XEPSD40P25000
XFPSD50P10KS0
XJPS040P10X00
XHPSD40P06000
XCPSD30P14000
XBPWW30P05K00
XEBSD30P06000
XEBSD30P06000
XOTWW40P06000
XHTWW40P08000
LX-CZA001URE0
XOTSE40P10000
XHTSD40P08RV0
LHLDKA008WRF0
U
J
J
J
U
J
J
U
J
J
J
J
U
U
J
J
U
J
Screw: 4mm x 8mm
Washer: 5mm x 0.6mm
Screw: 3mm x 6mm
Nut: 4mm x 3.2mm
Ring
Washer: 4mm x 1.0mm
Screw: 4mm x 25mm
Screw: 5mm x 10mm
Screw: 4mm x 12mm
Screw: 4mm x 6mm
Screw: 3mm x 15mm
Screw: 3mm x 5mm
Screw: 3mm x 6mm [R-963(SL)M/(W)M]
Screw: 3mm x 6mm [R-953(SL)M/(W)M]
Screw: 4mm x 6mm
Screw: 4mm x 6mm
Special screw
Screw: 4mm x 10mm
SCREW: 4mm x 8mm
P-clip
SCREWS,NUTS AND WASHERS
U
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
R-953/963M - 46
3. PART NO.
4. DESCRIPTION
OVEN PARTS
2-2
7-16
4-17
7-10
1-17
4-25
7-5
6-11
4-20 4-18
4-45
7-13
1-9
7-17
7-13
4-27
1-25
4-10
4-22
7-16
7-3
These holes for
R963M only
4-21
4-19
4-13
7-13
4-23
4-15
7-17
4-3
7-12
7-3
7-16
1-8
4-16
7-3
7-10
4-24
7-3
4-1
4-11
4-14
4-26
4-30
1-12
1-14
7-14
7-15
4-29
7-3
7-16
7-12
4-39
7-4
1-24
7-3
4-24
4-28
1-15
1-20
7-6
4-9
4-37
7-16
4-4
4-8
4-38
4-2
4-7
7-11
7-1
7-14
4-5
7-10
1-4
1-7
7-9
4-6
1-19
7-13
7-10
4-34
1-2
6-2
4-12
1-3
4-40
4-41
7-1
7-16
4-36
1-21
4-43
1-18
4-31
7-16
1-1
1-10
7-10
1-11
6-1
2-4
7-8
2-1
7-1
7-2
1-13
1-6
1-5
7-18
7-16
2-3
1-22
4-42
6-3
1-23
7-18
7-1
7-19
4-35
7-7
7-16
4-32
4-44
2-3
7-16
4-33
7-16
R-953/963M - 47
1-16
CONTROL PANEL / DOOR PARTS
CONTROL PANEL PARTS
3-2
3-3
3-6
3-4
3-9
3-7
3-1
3-8
5-2
5-1
3-5
5-1-8
5-1-1
5-1-3
5-1-2
5-1-8
DOOR PARTS
5-1-5
5-1-7
5-1-6
5-1-4
R-953/963M - 48
MISCELLANEOUS / PACKING & ACCESSORIES
MISCELLANEOUS
6-4
6-8
6-9
6-5
Actual wire harness may be different than illustration.
6-10
To Magnetron
ToCapacitor
PACKING AND ACCESSORIES
TURNTABLE TRAY
TRY PAD ASSEMBLY
(SPADPA020URE0)
TOP PAD ASSEMBLY
(FPADBA303WRK2)
WRAP COVER
(SSAKHA047WRE0)
LOW RACK
HIGH RACK
DOOR PROTECTION SHEET
(SPADPA020WRE0)
ROLLER STAY
(FROLPA060WRE0)
PRINTED MATTER
INTO THE
OVEN CAVITY
ACCESSORY HOLDER
(SPADPA019URE0)
SQUARE RACK (X2)
(FAMI-A003URK0)
PLASTIC BAG
(SSAKBA003URE0)
BOTTOM PAD ASSEMBLY
(FPADBA304URK3)
PACKING CASE
R-953(W)M; SPAKCA375URR0
R-953(SL)M; SPAKCA376URR0
R-963(W)M; SPAKCA377URR0
R-963(SL)M; SPAKCA378URR0
Not Replaceable Items.
R-953/963M - 49
COPYRIGHT C 2000 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.
2000 SHARP CORP. (6S1.31E) Printed in U.K.
R-953/963M - 50