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R-21AT
SERVICE MANUAL
SX802R21ATPKK
COMMERCIAL
MICROWAVE OVEN
1000W/ R-21AT
ON DEF NO. X2
CHECK
MODEL
R-21AT
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 FRONT COVER
CAUTION, MICROWAVE RADIATION ............................................................................................................. 1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS ......................................................................................................................... 2
GENERAL INFORMATION ................................................................................................................................ 2
APPEARANCE VIEW ....................................................................................................................................... 3
OPERATION SEQUENCE ................................................................................................................................ 4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................ 5
TROUBLESHOOTING GUIDE .......................................................................................................................... 6
TEST PROCEDURE ......................................................................................................................................... 7
TOUCH CONTROL PANEL ASSEMBLY ........................................................................................................ 13
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ........................................................... 20
MICROWAVE MEASUREMENT .................................................................................................................... 25
WIRING DIAGRAM ......................................................................................................................................... 26
PICTORIAL DIAGRAM ................................................................................................................................... 27
CONTROL PANEL CIRCUIT ........................................................................................................................... 28
PRINTED WIRING BOARD ............................................................................................................................. 29
PARTS LIST ................................................................................................................................................... 30
SHARP CORPORATION
R-21AT
SERVICING
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following
parts will result in electrocution.
High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier, High voltage fuse, High
voltage harness.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE HIGH-VOLTAGE CAPACITOR.
The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait
for 60 seconds and then short-circuit the connection of the high-voltage capacitor (that is, of the connecting
lead of the high-voltage rectifier) against the chassis using a screwdriver with an insulated handle.
Sharp recommend that wherever possible fault-finding is carried out with the supply disconnected. In some
cases, it may be necessary to connect the supply with the cover removed to carry out fault investigation in the
circuitry. In such cases, the high voltage circuit should be disabled as described below to reduce the hazards:Carry out 3D checks (see above)
Disconnect the supply leads from the high voltage transformer, making a note of the polarity. Insulate the
connectors, ensuring they are positioned away from the transformer and fastened there.
Connect any relevant test equipment e.g. voltmeter.
Reconnect the oven to the supply, then close the door.
Note the results of the test, taking care to keep clear of the operational oven.
Carry out 3D checks (see above).
Reconnect the leads to the transformer. Take care to observe correct polarity.
Carry out 4R checks (see below).
Microwave ovens should not be used without load. To test for the presence of microwave energy within a
cavity, place a cup of cold water on the ceramic shelf, close the door and set the microwave timer for one (1)
minute, set the power level to HIGH (100%) and push the start key. When the one (1) minute has elapsed
(timer at zero) carefully check that the water is now hot.
AFTER REPAIR REMEMBER TO CHECK 4R
1)
2)
3)
4)
Reconnect all leads removed from components during testing.
Replace the outer case (cabinet).
Reconnect the supply.
Run the oven. Check all functions.
When all service work is completed and the oven is fully assembled, the microwave power output should be
checked and microwave leakage test should be carried out.
IMPORTANT: If the oven becomes inoperative because of a blown fuse M10A Fuse, check the monitored 1st.
interlock switch and monitor switch before replacing the fuse M10A.
WARNING: WIRING / RE-WIRING
RE-WIRING
Before carrying out any work; carry out 3D checks.
1) Disconnect the power supply.
2) Open the door and wedge open.
3) Discharge the high voltage capacitor.
1) Wires must not touch:
a) High voltage parts:
b) Parts that become hot.
c) Sharp edges
d) Movable parts
2) Positive lock connectors are fitted correctly.
3) Wires are connected correctly as per pictorial diagram.
4) Now wire leads are trapped by the outer wrap.
R-21AT
SERVICE MANUAL
PRODUCT SPECIFICATIONS
GENERAL INFORMATION
COMMERCIAL
MICROWAVE OVEN
APPEARANCE VIEW
R-21AT
GENERAL IMPORTANT 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.
CAUTION
MICROWAVE RADIATION
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
SERVICING AND
TROUBLESHOOTING GUIDE
Service engineers 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
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained
service engineers.
TEST PROCEDURE
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
MICROWAVE MEASUREMENT
WIRING DIAGRAM
All the parts marked "*" on parts list are used at voltages more than
250V.
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.
SHARP CORPORATION
OSAKA, JAPAN
1
PARTS LIST
R-21AT
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
Power Output
Case Dimensions
Cooking Cavity Dimensions
Control Complement
Set Weight
230 - 240 Volts
50 Hertz
Single phase, 3 wire earthed
1000 W nominal of RF microwave energy (measured by method of IEC 705)
Operating frequency 2450 MHz
Width
520 mm
Height 309 mm including foot
Depth
406 mm
Width
351 mm
Height 211 mm
Depth
372 mm
Touch Control System
Timer (0 - 99 minutes and 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI ........................................... Full power throughout the cooking time
P-90 ............................................................. approx. 90% of Full Power
P-80 ............................................................. approx. 80% of Full Power
P-70 ............................................................. approx. 70% of Full Power
P-60 ............................................................. approx. 60% of Full Power
P-50 ............................................................. approx. 50% of Full Power
P-40 ............................................................. approx. 40% of Full Power
P-30 ............................................................. approx. 30% of Full Power
P-20 ............................................................. approx. 20% of Full Power
P-10 ............................................................. approx. 10% of Full Power
P-0 ............................................. No power throughout the cooking time
DOUBLE QUANTITY pad
EXPRESS DEFROST pad
Number pads
SELECT TIME pad
STOP/CLEAR pad
SELECT POWER pad
START pad
SET pad
CHECK pad
SIGNAL pad
Approx. 18 kg
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
2
R-21AT
APPEARANCE VIEW
OVEN
10
1. Oven light
2. Ceramic shelf
3. Control panel
9
4. Cavity face plate
5. Door latch openings
6. Door latches
7. Door hinges
8. Door seals and sealing surfaces
9. Door handle
10.Oven door with see-through window
11.Air ventilation cover and openings
12.Power supply cord
13.Air intake openings
14.Outer case cabinet
7
1
12
11
2
13
14
6
8
4
5
3
TOUCH CONTROL PANEL
1.
2.
3.
4.
Digital Readout
DOUBLE QUANTITY pad
EXPRESS DEFROST pad
Number pads for time and memory programming
5. SELECT TIME pad
6. STOP/CLEAR pad; touch to stop operation of
oven and clear remaining heating time
7. SELECAT POWER pad for setting variable
power level
8. START pad; touch to operate oven after door
is closed and time is set
9. SET pad for setting memory
10.CHECK pad for checking memory
11.SIGNAL pad for setting signal sound
1
ON DEF NO. X2 CHECK
2
3
4
5
7
9
10
3
6
8
11
R-21AT
OPERATION SEQUENCE
OFF CONDITION
6-1. When the oven door is opened during or after the
cycle of a cooking program, the 1st. interlock switch,
latch switch and 2nd. interlock relay control switch
must open their contacts first. After that the contacts
(COM-NC) of the monitor switch can be closed.
6-2. When the oven door is closed, the contacts (COMNC) of the monitor switch must be opened. After that
the contacts of the 1st. interlock switch, latch switch
and 2nd. interlock relay control switch are closed.
6-3. When the oven door is opened and the contacts of the
1st. latch switch, 2nd. latch switch and the relay RY2
remain closed, the fuse M10A will blow, because the
monitor switch is closed and a short circuit is caused.
Closing the door activates the 1st. latch switch, 2nd. latch
switch and 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
and the control unit.
Figure O-1 on page 26
1. The oven display will show
.
.
MICROWAVE COOKING CONDITION
POWER LEVEL P-0 TO P-90 COOKING
Program desired cooking time by touching SELECT TIME
pad and the NUMBER pads. When the START pad is
touched, the following operations occur:
When Variable Cooking Power is programmed, the line
voltage is supplied to the power transformer intermittently
through the contacts of relay (RY-2) which is operated by
the control unit within a 32 second time base. Microwave
power operation is as follows:
Figure O-2 on page 26
RELAY
RY-2
RY-3
CONNECTED COMPONENTS
power transformer
oven lamp/antenna motor/fan motor
VARI-MODE
Power 10(P-HI)
(100% power)
Power 9(P-90)
(approx. 90% power)
Power 8(P-80)
(approx. 80% power)
Power 7(P-70)
(approx. 70% power)
Power 6(P-60)
(approx. 60% power)
Power 5(P-50)
(approx. 50% power)
Power 4(P-40)
(approx. 40% power)
Power 3(P-30)
(approx. 30% power)
Power 2(P-20)
(approx. 20% power)
Power 1(P-10)
(approx. 10% power)
Power 0(P-0)
(0% power)
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 2300 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 wave length 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 RY2 + RY3 go back to their home position.
The circuits to the oven lamp, high voltage transformer,
fan motor and antenna motor are cut off.
5. When the oven door is opened during a cooking cycle,
the switches come to the following condition.
Switch
Contact
1st. interlock switch
Latch switch
2nd. interlock relay
control switch
COM-NO
COM-NO
Condition
During
Oven Door
Cooking Open(No cooking)
Closed
Opened
Closed
Opened
COM-NO
Closed
Opened
Monitor Switch
COM-NC
Opened
Closed
Note:
The circuit to the high voltage transformer, fan motor, oven
lamp and antenna motor are cut off when the 1st. interlock
switch, latch switch and 2nd. interlock relay control switch
are made open. 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 1st.
interlock switch.
4
ON TIME
32 sec.
OFF TIME
0 sec.
30 sec.
2 sec.
26 sec.
6 sec.
24 sec.
8 sec.
22 sec.
10 sec.
18 sec.
14 sec.
16 sec.
16 sec.
12 sec.
20 sec.
8 sec.
24 sec.
6 sec.
26 sec.
0 sec.
32 sec.
The ON/OFF time ratio does not correspond with
the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
R-21AT
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
HIGH VOLTAGE FUSE 0.75A
The door is opened by grasping the door handle, refer to
Figure D-1.
When the door handle is grasped, the handle lever is
pulled. And then the upper and lower latch heads are
moved upward by the handle lever, and they are released from the latch hook. Now the door will open.
The high voltage fuse blows when the high voltage rectifier
or the magnetron is shorted.
THERMAL CUT-OUT 145˚C (MAGNETRON)
This thermal cut-out protects the magnetron against overheating. If the temperature goes up higher than 145˚C
because the fan motor is interrupted or the ventilation
openings are blocked, the thermal cut-out will open and
line voltages to the high voltage transformer will be cut off
and the operation of the magnetron will be stopped. The
thermal cut-out will not resume.
Latch Head
Handle
Lever
Latch Hook
THERMAL CUT-OUT 125˚C (OVEN)
Door
Handle
The thermal cut-out located on the top of the oven cavity
is designed to prevent damage to the oven if the food in the
oven catches fire due to over heating produced by improper setting of the cooking time or failure of control unit.
Under normal operation, the oven thermal cut-out remains closed. However, when abnormally high temperatures are reached within the oven cavity, the oven thermal
cut-out will open at 125˚C causing the oven to shut down.
The thermal cut-out will not resume.
Latch Switch
Lever A
1st. Interlock Switch
Latch
Lever
Latch Switch
Lever B
Latch Head
Latch Switch
Lever C
Monitor
Switch
2nd. Interlock Relay
Control Switch
Latch Switch
MONITOR RESISTOR
The monitor resistor prevents the fuse M10A bursting
when the fuse M10A blows due to the operation of the
monitor switch.
Figure D-1. Door Open Mechanism
1ST. INTERLOCK SWITCH, LATCH SWITCH AND
2ND. INTERLOCK RELAY CONTROL SWITCH
NOISE FILTER
1. When the oven door is closed, the contacts (COM-NO)
of each switch must be closed.
2. When the oven door is opened, the contacts (COMNO) of each switch must be opened.
The noise filter assembly prevents radio frequency interference that might flow back in the power circuit.
MONITOR SWITCH
The antenna motor rotates the stirrer antenna located on
the bottom of the oven cavity, so that the food on the
ceramic shelf is cooked evenly during cooking. The antenna motor may turn in either direction.
ANTENNA MOTOR
1. When the door is closed, the contacts (COM-NC) must
be opened.
2. When the door is opened, the contacts (COM-NC)
must be closed.
3. If the oven door is opened and the contacts (COM-NO)
of the 1st. interlock switch fail to open, the fuse M10A
blows immediately after closing the contacts (COMNC) of the monitor switch.
COOLING FAN MOTOR
The cooling fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes
surrounding the magnetron and cools the magnetron.
This air is channelled through the oven cavity to remove
steam and vapors given off from the heating food. It is
then exhausted through the exhausting air vents at the
oven cavity.
CAUTION: BEFORE REPLACING A BLOWN FUSE
M10A TEST THE 1ST. INTERLOCK SWITCH,
MONITOR SWITCH AND MONITOR RESISTOR FOR PROPER OPERATION. (REFER
TO CHAPTER “TEST PROCEDURE”).
FUSE M10A 250V
1. If the wire harness or electrical components are shortcircuited, this fuse blows to prevent an electric shock or
fire hazard.
2. This fuse blows when the 1st. interlock switch remain
closed with the oven door open and when the contacts
(COM-NC) of monitor switch closes.
5
R-21AT
TROUBLESHOOTING GUIDE
Home fuse or circuit
breaker
blows
when
power cord is plugged into
wall outlet.
OFF
CONDITION
Fuse M10A blows when
power cord is plugged into
wall receptacle.
.
does not appear
in display when power
cord is first plugged into
wall outlet.
Oven lamp does not light
when door is opened.
Oven lamp lights but fan
motor and antenna motor
do not operate.
COOKING
CONDITION
Oven does not go into
cook cycle when START
pad is touched.
Oven seems to be
operating but little or no
heat is produced in oven
load. (Food incompletely
cooked or not cooked at
all at end of cook cycle.)
Oven goes into a cook
cycle
but
extremely
uneven
heating
is
produced in oven load
(food).
Oven does not cook
properly
when
programmed for Cooking
Power 5 mode. (Operates
properly
on
Cooking
Power 10 (HIGH) mode.)
ERROR MODE
"EE9" Maximum time is
exceeded.
6
DIRTY OVEN CAVITY
MISADJUSTMENT SWITCH
LOW VOLTAGE
WRONG OPERATION
SHORTED IN POWER CORD
SHORT OR OPENED WIRING
OVEN LAMP OR SOCKET
EXCEED MAX. HEATING TIME
FOIL PATTERN ON P.W.B.
RELAY (RY3)
K L M M N CK RE RE RECK CK CKCK
KEY UNIT
RELAY (RY2)
J
TOUCH CONTROL PANEL
ANTENNA MOTOR
I
FUSE M10A
NOISE FILTER
COOLING FAN MOTOR
THERMAL CUT-OUT
MONITOR SWITCH
2ND. INTERLOCK RELAY CONTROL SWITCH
LATCH SWITCH
HIGH VOLTAGE CAPACITOR
1ST. INTERLOCK SWITCH
PROBLEM
H.V. RECTIFIER ASSEMBLY
CONDITION
HIGH VOLTAGE TRANSFORMER
POSSIBLE CASE
AND
DEFECTIVE PARTS
A B C D E E E E F G H I
MAGNETRON
TEST PROCEDURE
HIGH VOLTAGE FUSE
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.
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
A
MAGNETRON TEST
COMPONENT TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL
WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECKS.
Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal.
To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron
filament terminals, the meter should show a reading of less than 1 ohm.
To test for short filament to anode condition, connect ohmmeter between one of the filament terminals
and the case of the magnetron (ground). This test should be indicated an infinite resistance. If a low
or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER (1 litre load)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted). Microwave output power from the magnetron can be measured by way
of IEC 705, i.e. it is measured by how much power the water load can absorb. To measure the
microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W)
heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if the
temperature of the water with V(ml) rises ∆T (°C) during this microwave heating period, the calorie of
the water is V x ∆T.
The formula is as follows;
P x t / 4.187 = V x ∆ T
P (W) = 4.187 x V x ∆T / t
Our condition for water load is as follows:
Room temperature ........... around 20°C
Power supply Voltage .............. Rated voltage
Water load.................................. 1000 g
Initial temperature .............................. 10±2°C
Heating time .............................. 42 sec.
P = 100 x ∆T
Measuring condition:
1. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start the test.
3. Temperature of the water
The initial temperature of the water is (10±2)°C.
4. Select the initial and final water temperature so that the maximum difference between the final water
temperature and the ambient temperature is 5°C.
5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat.
6. The graduation of the thermometer must be scaled by 0.1°C at minimum and be an accurate
thermometer.
7. The water load must be (1000±5) g.
8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included.
NOTE: The operation time of the microwave oven is “t + 2” sec. (2 sec. is magnetron filament heat-up time.)
Measuring method:
1. Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11°C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆ T of
(10 ± 2) K.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature. (Example: The final temperature T2 = 21°C)
7. Calculate the microwave power output P in watts from above formula.
7
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Initial temperature .................................................................................................. T1 = 11°C
Temperature after (42 + 2) = 44 sec ...................................................................... T2 = 21°C
Temperature difference Cold-Warm ...................................................................... ∆T1 = 10˚C
Measured output power
The equation is “P = 100 x ∆T” ................................................ P = 100 x 10°C = 1000 Watts
JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 100 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚C
T2˚C
Heat up for 44 sec
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 windings. The following readings should be
obtained:a. Primary winding ................................ approximately 1.3 Ω
b. Secondary winding ............................ approximately 86 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.
C
HIGH VOLTAGE RECTIFIER ASSEMBLY TEST
B
CARRY OUT 3D CHECKS.
C
HIGH VOLTAGE RECTIFIER
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.
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
8
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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.
F
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
Parts Name
Temperature of "ON"
condition (closed circuit).
(˚C)
Temperature of "OFF"
condition (open circuit).
(˚C)
Indication of ohmmeter
(When room temperature
is approx. 20˚C.)
Thermal cut-out 125˚C
This is not resetable type.
Above 125˚C
Closed circuit
Thermal cut-out 145˚C
This is not resetable type.
Above 145˚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 or a fault condition within the magnetron or HV. circuit.
An open circuit thermal cut-out (OVEN) indicates that the food in the oven cavity may catch fire, this
may be due to over heating produced by improper setting of the cooking timer or failure of the control
panel.
CARRY OUT 4R CHECKS.
G
BLOWN FUSE M10A
CARRY OUT 3D CHECKS.
If the fuse M10A is blown when the door is opened, check the 1st. interlock switch, monitor switch and
monitor resistor.
If the fuse M10A is blown, there could be a short or ground in electrical parts or wire harness. Check
them and replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION:
Only replace fuse M10A with the correct value replacement.
9
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
H
NOISE FILTER TEST
COMPONENT TEST
L
N
MEASURING POINTS
Between N and L
Between terminal N and WHITE
Between terminal L and RED
INDICATION OF OHMMETER
Approx. 680 kΩ
Short circuit
Short circuit
If incorrect readings are absorbed, replace the noise filter unit.
DISCHARGE RESISTOR 680 kΩ
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR 0.068µF/ AC 250V
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
CARRY OUT 4R CHECKS.
I
FUSE
M10A
NOISE FILTER
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.
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
DISCHARGE
RESISTOR 10MΩ
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 219 Ω
Antenna motor
Approximately 11 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
J
HIGH VOLTAGE FUSE TST
CARRY OUT 3D CHECKS.
If the high voltage fuse is blown, there could be a short in the high voltage rectifier or the magnetron.
Check them and replace the defective parts and the high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION:
K
Only replace high voltage fuse with the correct value replacement.
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 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 L) 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.
10
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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.
L
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 a 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.
G1
G2
G3
17
G9
18
G10
19
G11
20
G12
G4
G5
G6
G7
G8
7
SELECT
POWER
DOUBLE
QUANTITY
START
SET
8
SELECT
TIME
EXPRESS
DEFROST
STOP/
CLEAR
CHECK
9
0
15
16
5
6
13
14
3
4
11
12
1
SIGNAL
2
CARRY OUT 4R CHECKS.
M
RELAY TEST
CARRY OUT 3D CHECKS.
Remove the outer case and check voltage between Pin Nos. 3 and 7 of the 3 pin connector (A) 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.
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
RY2
Approx. 18.0V D.C.
High voltage transformer
RY3
Approx. 18.0V D.C.
Oven lamp / Antenna motor / Fan motor
CARRY OUT 4R CHECKS.
11
R-21AT
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
N
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
1
The rated AC voltage is not present at
Power terminal of CPU connector (CN-A).
Check supply voltage and oven power cord.
CAUSE OR CORRECTION
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)
(TB1)
7
b
a
d
(J1)
P
VRS1
12
12
c
(CT1)
(VRS2)
(J2)
CARRY OUT 4R CHECKS.
(17)
POWER
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.
R-21AT
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) Control Unit
(2) Key Unit
11) Relay Driving Circuit
This is a circuit for driving output relay by IC1 output.
12) Door Sensing Switch Circuit
This is a circuit for driving IC1 to detect door opening/
closing.
The principal functions of these units and the signals
communicated among them are explained below.
2. Key Unit
The key unit is composed of a matrix circuit in which
when a key it touched, one of signals P30--P34
generated by the LSI, is passed through the key and
returned to the LSI as one of signals P24--P27.
This model has 20 Memory pads.
When the oven is shipped, Memory pad 1 to 10 are set
as follows: fig.1.
1. Control Unit
Signal of key touch and oven function control are all
processed by one microcomputer.
1) Power Supply Circuit
This circuit changes output voltage at the secondary
side of the low voltage (T1) transformer to voltages
required at each part by full wave rectifying circuit,
constant voltage circuit, etc..
2) ACL Circuit
This is an Auto-clear Circuit, i.e., a reset circuit, which
enables IC1 to be activated from initial state.
3) Power SYNC Signal Generating Circuit
This is a circuit for generating power SYNC signal by
virtue of the secondary side output of transformer T1.
This signal is used for a basic frequency to time
processing and so on.
Memory No.
1
2
3
4
5
6
7
8
9
0
4) Clock Circuit
This is a circuit for controlling clock frequency required
for operating IC1.
Cook Time
10 sec.
20 sec.
30 sec.
45 sec.
1 min.
1 min. 15 sec.
1 min. 30 sec.
2 min.
2 min. 30 sec.
3 min.
Output Power
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
(fig. 1)
5) IC1 (Main Processor)
This is a one-chip microcomputer, responsible for
controlling the entire control unit.
6) IC2 (Memory Processor)
This is a memory IC, responsible for memory function.
This model has a double quantity pad. When the oven
is shipped, Magnification "1.7" is preset in the double
quantity pad.
This model has an express defrost pad. When the
oven is shipped, express defrost is set as follows:
fig.2.
7) IC3
This is a IC for driving light emitting diode.
8) Display Circuit
This is a circuit for driving light emitting diode by IC1
output.
9) Key Input Circuit
This is a circuit for transmitting key input information to
IC1.
FORMULA
POWER
1 STAGE
2 STAGE
3 STAGE
P = 0.2T
P = 0.15T
P = 0.65T
60 %
40 %
20 %
T : Total cooling time
(fig. 2)
10) Sound-body Driving Circuit
This is a circuit for driving sound body by IC1 output.
When 1/2 total cooking time is passed, the signal
will sound and "CHECK" indicator will flash
DESCRIPTION OF LSI
LSI(IZA897DR)
The I/O signal of the LSI(IZA897DR) is detailed in the following table.
Pin No.
1
2/3
4
5-6
Signal
I/O
Description
VCC
IN
Power source voltage: +5V.
VC voltage of power source circuit input.
VEE/AVSS
IN
Connected to GND
VREF
IN
Connected to VC. (+5V)
AN7-AN6
IN
Terminal not used.
13
R-21AT
Pin No.
Signal
I/O
Description
7-8
AN5-AN4
IN
Terminal to change functions according to the model.
Signal in accordance with the model in operation is applied to set up its function.
9-10
AN3-AN2
IN
Terminal not used.
11
AN1
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "L" level signal (0V).
Door opened; "H" level signal (+5V).
12
AN0
IN
Terminal not used.
13
P55
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power level operation, "H" level during
cooking; "L" level otherwise. In other power level operation
(90,80,70,60,50,40,30,20,10 or 0%), "H" and "L" level is repeated according to power
level.
Power level
100%
90%
80%
70%
60%
50%
ON
OFF
32sec. 0sec.
30sec.
26sec.
24sec.
22sec.
18sec.
2sec.
6sec.
8sec.
10sec.
14sec.
14-15
P54-P53
OUT
Terminal not used.
16-18
P52-P50
IN
Terminal not used.
P47
OUT
19
Power level
40%
30%
20%
10%
0%
ON
OFF
16sec. 16sec.
12sec.
8sec.
6sec.
0sec.
Signal to sound buzzer.
This signal is to control the 2.5kHz continuous signal through IC3.
A: key touch sound.
B: Guidance sound.
C: Completion sound.
ON
20sec.
24sec.
26sec.
32sec.
+5V
OFF
GND
32 sec.
0.12 sec
+5V
A
T
GND
1.2 sec
1.2 sec
+5V
B
200µsec.
200µsec.
GND
2.4 sec
+5V
C
GND
20
P46
OUT
Oven lamp, Fan motor and Antenna motor driving signal. (Square Waveform :
50Hz)
To turn on and off the shut-off relay (RY3). The
Square waveform voltage is delivered to the
RY3 driving circuit and relays(RY2, COOK RE20 msec
LAY) control circuit.
During cooking
H
L
21
P45
OUT
Digit selection signal.
The relation between digit signal and digit are
as follows:
Digit signal
Digit
P42 ..................... 1st.
P43 .................... 2nd.
P44 ..................... 3rd.
P45 ..................... 4th.
Normally, one pulse is output in every ß
period, and input to the grid of the lightemitting diode.
22-24
25
P44-P42
OUT
INT1
IN
H
ß(50Hz)
L
+5V
P42
GND
P43
P44
P45
Digit selection signal.
Signal similar to P45.
Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
H : +5V
L : GND
20 msec
26
P40
IN
Connected to GND through resistor.
14
R-21AT
Pin No.
Signal
I/O
Description
27
RESET
IN
28
P71
OUT
29
P70
IN/OUT
30
XIN
IN
31
XOUT
OUT
32
VSS
IN
Connected to GND.
33
P27
IN
Signal coming from touch key.
When either one of G-12 line keys on key matrix is touched, a corresponding signal
out of P30, P31, P32, P33, P34 will be input into P27. When no key is touched, the
signal is held at "L" level.
34
P26
IN
Signal similar to P27.
When either one of G-11 line keys on key matrix is touched, a corresponding signal
will be input into P26.
35
P25
IN
Signal similar to P27.
When either one of G-10 line keys on key matrix is touched, a corresponding signal
will be input into P25.
36
P24
IN
Signal similar to P27.
When either one of G-9 line keys on key matrix is touched, a corresponding signal
will be input into P24.
37-38
P23-P22
OUT
Terminal not used.
39-40
P21-P20
OUT
Segment data signals.
The relation between signals and indicators are as follows:
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily
set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter
set at "H" level.
Memory (EEPROM) clock output.
Memory (EEPROM) data input/output.
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XOUT terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
Signal
P21,P20
P17.P16
P15,P14
P13,P12
P11,P10
P07,P06
Segment
.......... 1
.......... 2
.......... 3
.......... 4
.......... 5
.......... 6
Signal
Segment
P05,P04 ............. 7
P03,P02 ............. 8
P01,P00 ............. 9
ß(50Hz)
+5V
GND
41-48
P17-P10
OUT
Segment data signal.
Signal similar to P21.
49-56
P07-P00
OUT
Segment data signal.
Signal similar to P21.
57-59
P37-P35
OUT
Terminal not used.
60
P34
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G4 line keys on key matrix is touched.
61
P33
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G5 line keys on key matrix is touched.
62
P32
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G6 line keys on key matrix is touched.
63
P31
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G7 line keys on key matrix is touched.
64
P30
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24
terminals while one of G8 line keys on key matrix is touched.
15
R-21AT
2-2 Memory IC (IC2)
X24C02P is a 2K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with
256 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/output signal
for IC2 are as shown in the following diagram.
FUNCTIONAL DIAGRAM
(3) Vcc
(4) Vss
TOP VIEW
A0
A1
A2
1
(5) SDA
8
2
START
STOP
LOGIC
CONTROL
LOGIC
VCC
7
TEST
6
SCL
(6) SCL
SLAVE ADDRESS
REGISTER
COMPARATOR
4
5
E 2PROM
256 x 8
INC
WORD
ADDRESS
COUNTER
1
64
5
3
R/W
VSS
64
XDEC
LOAD
3
H.V. GENERATION
TIMING
& CONTROL
START CYCLE
YDEC
SDA
8
CK
PIN
DATA REGISTER
Dout
Dout
ACK
Table 1. Relation between Pin Nos, and Signals
Pin No.
Signal
I/O
Description
1-3
A0-A2
IN
Connected to +5V.
4
VSS
IN
Connected to GND.
5
SDA
IN/OUT
6
SCL
IN
Clock signal input : input/outputs sireal data at every one pulse.
7
TEST
IN
Connected to GND.
8
VCC
IN
Connected to +5V.
Serial data input/output : input/outputs data to IC1.
When the memory IC (IC2) or control unit is exchanged, input the relay timing to the memory IC (IC2), referring to the
"How to input the relay timing". Otherwise the oven will make a big noise when starting.
How to input the relay timing
PAD
DISPLAY
(Door close)
.
CHECK
.
.
CHECK
SIGNAL
SIGNAL
DOUBLE
QUANTITY
INDICATOR
PHONE
No.
CHECK
34 5 6
(service total count upper figure 3456XX)
7
38
No.
69
SET
0
3. 8. 4. 9
38
49
SET
38
49
CHECK
... 0.1sec BUZZER
CHECK
82
68
(user total count)
7
(after 1 sec.)
... Flashing /
x4
.
16
R-21AT
TOUCH CONTROL PANEL SERVICING
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the
circuits. When handling these parts, the following
precautions should be strictly followed. CMOS LSI
have extremely high impedance at its input and output
terminals. For this reason, it is easily influenced by the
surrounding high voltage power source, static electricity charge in clothes, etc. and sometimes it is not
fully protected by the built-in protection circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them
in aluminium foil. Also wrap all PW boards containing
them in aluminium foil.
2) When soldering, ground the technician as shown in
the figure and use grounded soldering iron and work
table.
transformer.
4) Re-install the outer case (cabinet).
5) Re-connect the power supply cord after the outer
case is installed.
6) Run the oven and check all functions.
A. On some models, the power supply cord between the
touch control panel and the oven itself is so short that
the two can’t be separated. For those models, check
and repair all the controls (sensor-related ones included) of the touch control panel while keeping it
connected to the oven.
B. On some models, the power supply cord between the
touch control panel and the oven proper is long enough
that they may be separated from each other. For those
models, 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 dummy
resistor(s) with resistance equal to that of the controls
are used.
(2) Servicing the touch control panel with power supply from an external power source:
Disconnect the touch control panel completely from
the oven proper, and short both ends of the door
sensing switch (on PWB) of the touch control panel,
which brings about an operational state that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the
touch control panel, then it is possible to check and
repair the controls of the touch control panel it is also
possible to check the sensor-related controls of the
touch control panel by using the dummy resistor(s).
approx. 1M ohm
2. Shapes of Electronic Components
3
2
1
IC
KIA7805P1
E
CB
Transistor
DTA123ES
DTB143ES
DTC143ES
DTD143ES
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 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
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: DC10MHz type or more advanced model.
3) Others: Hand tools
5. Other Precautions
1) Before turning on the power source of the control unit,
remove the aluminium foil applied for preventing static
electricity.
2) Connect the connectors of the key unit to the control
unit being sure that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that abnormal voltage due to static electricity etc. is not applied
to the input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to PWB,
making sure that all connections are tight.
5) Be sure to use specified components where high
precision is required.
17
R-21AT
3) Practice for inputting total using times (Ex. 310000
times).
... Flashing / ... 0.1sec BUZZER
PROCEDURE FOR CHECKING/CLEARING
SERVICE COUNTS OF MICROWAVE OVEN
The following procedure enables the servicer to obtain the
total using times (cook cycles) since the microwave oven
is purchased and the total operation time (hours) since the
microwave oven is purchased. The maximum capacity of
the total using is 999,999 times, and the maximum
capacity of total operation time is 999,999 hours.
PAD
(Door close)
CHECK
CHECK
SIGNAL
SIGNAL
DOUBLE
QUANTITY
1) Practice for checking total using times (Ex. 345678
times).
... Flashing / ... 0.1sec BUZZER
PAD
(Door close)
CHECK
CHECK
DISPLAY
.
.
.
82 68
QUANTITY
2
(after 1 sec.)
CHECK No.
CHECK
No.
78
(service total count lower figure)
XXXX78
1
1
(after 1 sec.)
SET
3,1,0,0
SET
34 56
x4
2
(after 1 sec.)
SET
0
SET
No.
No.
34 56
0
31 00
31 00
2
3456XX
(after 1 sec.)
34 56
(service total count upper figure)
2
(service total count upper figure)
1
CHECK No.
CHECK
3456XX
34 56
1 (No 1)
INDICATOR PHONE
INDICATOR PHONE
(user total count)
SIGNAL
SIGNAL
DOUBLE
DISPLAY
.
.
.
82 68
(user total count)
No.
78
0
0
0
(service total count 310000 set)
(service total count upper figure)
2 (No 2)
(after 1 sec.)
2
78
CHECK
No.
(service total count lower figure)
.
CHECK
... Flashing /
PAD
(Door close)
2) Practice for checking total operation time (Ex. 4567
hours).
... Flashing / ... 0.1sec BUZZER
PAD
(Door close)
CHECK
CHECK
DISPLAY
.
.
.
82 68
(user total count)
CHECK
CHECK
INDICATOR PHONE
SIGNAL
SIGNAL
DOUBLE
QUANTITY
CHECK No.
CHECK
... 0.1sec BUZZER
DISPLAY
.
.
.
82 68
(user total count)
INDICATOR PHONE
CHECK No.
CHECK
34 56
(service total count upper figure)
3456XX
9
SIGNAL
SIGNAL
DOUBLE
QUANTITY
.
4) Practice for inputting total operation time (Ex. 1234
hours).
34 56
(service total count upper figure)
9
(after 1 sec.)
SET
1,2
SET
45
0
12
12
0
10
No.
x2
No.
3456XX
9 (No 9)
9
(after 1 sec.)
(after 1 sec.)
SET
3,4
SET
No.
(Total operation time 1234 hours set)
45
(Total operation time upper figure)
0 (No 0)
0
(after 1 sec.)
CHECK
No.
67
(Total operation time lower figure)
CHECK
67
0
34
34
.
18
.
x2
R-21AT
5) Practice for cancelling total using times and total operation time (user and service) and all other counter.
... Flashing / ... 0.1sec BUZZER
PAD
(Door close)
SET
SET
(within 2.0sec.)
DOUBLE QUANTITY
CHECK
SINGLE
SET
DISPLAY
.
.
.
.
.
.
.
.
.
KEY
0
DISPLAY
0
1
:
9
START
INDICATOR PHONE
1
:
9
A
2) To check the constants of Express defrost.
DOUBLE
" " : Flicker /
PAD
CHECK
EXPRESS DEFROST
1. EXPRESS DEFROST
T = STG1 + STG 2 + STG3
STG = A x T + B
1) To set the constants of Express defrost.
Ex. 0.20T, 60% at 1st stage
0.15T, 40% at 2nd stage
0.65T, 20% at 3rd stage
" " : Flicker / : 0.1 sec BUZZER
(
(Door close)
SET
SET
(within 2 sec.)
#1 START
EXPRESS DEF
2,0
#2 SELECT TIME
0
SELECT POWER
6
SELECT TIME
1,5
SELECT TIME
0
SELECT POWER
4
SELECT TIME
#3
5
SIGNAL
2
SET
SET
DISPLAY
PHONE
"No." CHECK
DEF
P - 40
( PL )
PHONE
5
( pause time )
P - 20
( PL )
.
x2
( repeat )
.
CHECK
3) To set user counts
Practice for inputting total number of using times (Ex.
3100 times), and using times of Memory 1 (Ex. 100
times).
" " : Flicker / : 0.1 sec BUZZER
(+ - B)
DEF
PDEF
P - 60
0.00 DEF
0.15 DEF
(A)
0 DEF
0 DEF
INDICATOR
0.15
(A)
0
( +-B )
.
.
.
0.00
DEF.
0.20 DEF
(A)
0 DEF
0 DEF
DISPLAY
.
.
0.20
(A)
0
( +-B )
: 0.1 sec BUZZER
P - 60
( PL )
)
"NO"
After 10% of total cooking time is passed
:
After 90% of total cooking time is passed
There is no pause
No.
OTHER SETTING AND CHECKING PROCEDURE
PAD ORDER
PAUSE
End of each stage
PAD
(Door close)
CHECK
CHECK
x2
DISPLAY
.
.
.
82 68
(user total count)
INDICATOR PHONE
CHECK No.
CHECK
DOUBLE QUANTITY
SIGNAL
SET
3,1,0,0
SET
(+ - B)
DEF
PDEF
P - 40
0
31 00
31 00
x4
(user total count 3100 set)
#A
1
(after 1 sec.)
0 DEF
5 DEF
DEF
PDEF
SET
1,0,0
SET
1
1 32
(memory 1 count)
0
1 00
1 00
No.
x3
(memory 1 count 100 set)
CHECK
P - 20
. DEF
.
.
NOTE:
1 : To input using times of other memory, touch necessary Memory key
at above step #A.
2 : To input using times of manual cooking, touch SELECT TIME key at
above step #A.
3 : To input using times of Express Defrost, touch EXPRESS DEFROST
key at above step #A.
#1 : No key entry signal.
#2 : To set -B, touch the select power key twice.
#3 : Ex. defrost is paused after 50% of cooking time has lapsed when 5
key is entered, otherwise it is paused at the end of each stage.
19
R-21AT
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
1. Disconnect the oven from power supply.
2. Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).
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.
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 is damaged.
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:
OUTER CASE REMOVAL
further work.
7. 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: 1. DISCONNECT OVEN FROM POWER SUP
PLY BEFORE REMOVING OUTER CASE.
2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY
OVEN COMPONENTS OR WIRING.
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 five (5) screws from rear and along the
side edge of case.
4. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
6. Discharge the H.V. capacitor before carrying out any
HIGH VOLTAGE TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage transformer from high voltage capacitor and the magnetron.
3. Disconnect the H.V. fuse from the high voltage transformer.
4. Disconnect the main wire harness from the high volt-
age transformer.
5. Remove the four (4) screws holding the transformer to
base plate.
6. Remove the transformer.
7. Now the high voltage transformer is free.
HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND
HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL
8. Now, the high voltage fuse is free.
9. Remove one (1) screw holding the capacitor holder to
the oven cavity rear plate.
10.Remove one (1) screw holding the fan duct to the oven
cavity rear plate.
11.Release the capacitor holder from the fan duct.
12.Remove the capacitor from the capacitor holder.
13.Now, the capacitor should be free.
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect H.V. wire of the high voltage rectifier assembly from the magnetron.
3. Disconnect the filament lead of the high voltage transformer from the high voltage capacitor.
4. Remove one (1) screw holding earth side terminal of
the high voltage rectifier assembly.
5. Disconnect high voltage fuse and terminal of high
voltage rectifier assembly from the high voltage capacitor.
6. Now, the high voltage rectifier assembly should be free.
7. Disconnect the high voltage fuse from the high voltage
transformer.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE CAPACITOR HOLDER AND OVEN CAVITY REAR
PLATE WITH AN EARTHING SCREW.
MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the high voltage wire of the high voltage
rectifier assembly and filament lead of the transformer
from the magnetron.
20
R-21AT
3. Remove the one (1) screw holding the air guide to the
magnetron and remove the air guide.
4. Remove the one (1) screw holding the chassis support
to the magnetron.
5. Carefully remove four (4) screws holding magnetron to
waveguide, when removing the screws hold the magnetron to prevent it from falling.
6. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
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
CONTROL PANEL ASSEMBLY
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the control unit.
3. Remove the one (1) screw holding the control panel
assembly to the oven cavity front plate.
4. Lift up the control panel assembly.
5. Now, the control panel assembly is free.
CONTROL UNIT
6. Disconnect the flat ribbon cable from the connector CNG.
7. Remove the six (6) screws holding the control unit to
the control panel frame.
8. Release the two (2) tabs of the control panel frame
holding the control unit to the control panel frame.
9. Now, the control unit 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 a soft cloth so not to
cause scratches.
OVEN LAMP AND LAMP SOCKET REMOVAL
Oven lamp
socket
1.
2.
3.
4.
5.
CARRY OUT 3D CHECKS.
Screw the oven lamp from the oven lamp socket off.
Now, the oven lamp is free.
Lift up the oven lamp socket from air intake duct.
Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket with
the small flat type screw driver.
6. Now, the oven lamp socket is free.
Terminal
Wire lead
Terminal hole
Flate type small
screw driver
Figure C-1. Oven lamp socket
POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) 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
CAUTION: WHEN CONNECTING THE POSITIVE
LOCK ® CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK ®
CONNECTOR SO THAT THE LEVER FACES
YOU
Lever
2
Pull down
Figure C-2 Positive lock® connector
ANTENNA MOTOR REMOVAL
remove the one (1) screw holding the antenna motor.
4. Remove the antenna motor shaft from the antenna
motor.
5. Now, the antenna motor is free.
1. Disconnect the oven from the power supply.
2. Remove the one (1) screw holding the base plate cover
to the base plate and remove the base plate cover.
3. Disconnect the wire leads from the antenna motor and
21
R-21AT
FAN MOTOR REPLACEMENT
CAUTION:
* Do not reuse the removed fan blade because the
hole (for shaft) may be larger than normal.
12.Remove the two (2) screws holding the fan motor to the
fan duct.
13.Now, the fan motor is free.
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 tab on the fan duct.
4. Disconnect the wire leads from the fan motor.
5. Remove the one (1) screw holding the capacitor holder
to the oven cavity rear plate.
6. Remove the one (1) screw holding the fan duct to the
oven cavity rear plate.
7. Remove the fan duct from the oven.
8. Remove the fan blade from the fan motor shaft according to the following procedure.
9. Hold the edge of the rotor of the fan motor by using a
pair of groove joint pliers.
CAUTION:
* Make sure that no metal pieces enter the gap
between the rotor and the stator of the fan motor
because the rotor is easily shaven by pliers and
metal pieces may be produced.
* Do not touch the pliers to the coil of the fan motor
because the coil may be cut or injured.
* Do not disfigure the bracket by touching with the
pliers.
10.Remove the fan blade from the shaft of the fan motor
by pulling and rotating the fan blade with your hand.
11. Now, the fan blade will be free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws.
2. Install the fan blade to the fan motor shaft according to
the following procedure.
3. Hold the center of the bracket which supports the shaft
of the fan motor on the flat table.
4. Install the fan blade to the shaft of fan motor by pushing
the fan blade with a small, light weight, ball peen
hammer or rubber mallet.
CAUTION:
* Do not hit the fan blade hard when installing because the bracket may be disfigured.
* Make sure that the fan blade rotates smooth after
installation.
* Make sure that the axis of the shaft is not slanted.
5. Install the fan duct to the oven cavity rear plate with the
one (1) screw.
6. Install the capacitor holder to the oven cavity rear plate
with the one (1) screw.
7. Install the noise filter to the fan duct and the chassis
support with the one (1) screw.
8. Re-connect the wire leads to the fan motor.
Coil
Groove joint pliers
Shaft
Shaft
Axis
Stator
Gap
Bracket
These are the positions
that should be pinched
with pliers
Table
Stator
Rotor
Center of
bracket
Rotor
Rear view
Side view
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 cavity rear plate.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-3(a).
4. Release the power supply cord from the oven cavity
rear plate.
5. Now, the power supply cord is free.
1. Insert the moulding cord stopper of power supply cord
into the square hole of the oven cavity rear plate,
referring to the Figure C-3(b).
2. Install the earth wire lead of power supply cord to the
cavity rear 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.
Oven Cavity
Back Plate
Power Supply Cord
Moulding
Cord Stopper
Screw
Green/Yelow
Wire
Brown Wire
RED
L
Bule Wire
Power
Supply Cord
Chassis
Support
Oven Cavity
Rear Plate
WHT
N
Square Hole
Noise Filter
Figure C-3 (a) Replacement of Power Supply Cord
Figure C-3(b). Power Supply Cord Replacement
22
R-21AT
1ST. INTERLOCK SWITCH, LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH,
AND MONITOR SWITCH REMOVAL
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and Adjustment procedure.
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. Push the retaining tab outward slightly and remove the
switch.
Re-install
1. Re-install each switch in its place. The 2nd. interlock
relay control switch and the latch switch are in the lower
position and the 1st. interlock switch is in the upper
position. The monitor switch is in the middle position.
2. Re-connect wire leads to each switch.
Refer to pictorial diagram.
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
Latch Hook
Tabs
1st. Interlock Switch
Tab
Monitor Switch
Tab
Tab
2nd. Interlock Relay
Control Switch (Oven side)
Latch Switch
(Cabinet side)
Tab
Figure C-4. Switches
1ST. INTERLOCK SWITCH, LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH,
AND MONITOR SWITCH ADJUSTMENT
If the 1st. interlock switch, latch switch, 2nd. interlock relay
control 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 door closed, adjust latch hook by moving it back
and forth, and up and down. In and out play of the door
allowed by the upper and lower position of the latch
hook should be less than 0.5mm. The vertical position
of the latch hook should be adjusted so that the 1st.
interlock switch, latch switch and 2nd. interlock relay
control switch are activated with the door closed. The
horizontal position of the latch hook should be adjusted
so that the plunger of the monitor switch is pressed with
the door closed.
4. Secure the screws with washers firmly.
5. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
door toward the oven face. Both results (play in the
door) should be less than 0.5mm.
2. The 1st. interlock switch, latch switch and 2nd. interlock relay control switch interrupt the circuit before the
door can be opened.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Latch Head
Handle
Lever
Latch Hook
Door
Handle
Latch Switch
Lever A
1st. Interlock Switch
Latch
Lever
Latch Switch
Lever B
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when
in the latched position. First check upper position of
latch hook, pushing and pulling upper portion of door
toward the oven face. Then check lower portion of the
latch hook, pushing and pulling lower portion of the
Latch Head
Latch Switch
Lever C
Monitor
Switch
2nd. Interlock Relay
Control Switch
Latch Switch
Figure C-5. Latch Switch Adjustments
DOOR PARTS REPLACEMENT
CHOKE COVER
1. Disconnect the oven from the power supply.
2. Open the oven door and wedge it open.
3. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-6 to free engaging parts.
4. Pry the choke cover by inserting a putty knife as shown
in Figure C-6.
23
R-21AT
5. Release choke cover from door panel.
6. Now choke cover is free.
RE-INSTALL OF THE DOOR
1. Re-install all door parts except the choke cover.
2. Catch two (2) pins of door panel on two (2) holes of
upper and lower oven hinges.
3. Re-install choke cover to door panel by pushing.
Choke Cover
NOTE: After any service to the door;
(A) Make sure that door sensing switch and secondary interlock switch are operating properly. (Refer to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave radiation emission limitation standards.
(Refer to Microwave Measurement Procedure.)
Putty Knife
Door Frame
Figure C-6. Door Disassembly
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 center of
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
7. Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
8. Now, door sub assembly is free from oven cavity.
DOOR PANEL REMOVAL
9. Remove the four (4) screws holding the door panel to
the door frame.
10.Release door panel from seven (7) tabs of door frame
by sliding door panel downward.
11.Now, the door panel is free.
DOOR HANDLE REMOVAL
12.Release the latch spring from the tab of the latch angle
assembly.
13.Remove the two (2) screws holding the door handle
and the latch angle assembly through the door frame.
14.Now, door handle is free.
Note: The door on a microwave oven is designed to act as
an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle.
This function does not require that the door be airtight, moisture (condensation)-tight or light-tight.
Therefore, occasional appearance of moisture, light
or sensing of gentle warm air movement around
oven door is not abnormal and do not in themselves
indicate a leakage of microwave energy from oven
cavity.
LATCH HEADS REMOVAL
15.Remove the one (1) screw holding the latch angle
assembly to the door frame.
16.Remove the latch angle assembly together with the
latch lever, latch spring and the upper and lower latch
heads from the door frame.
17.Release the latch lever together with the latch spring
and the latch heads from the latch angle assembly.
18.Release the two (2) latch heads from the latch lever.
19.Now, the upper and lower latch heads are free.
Pin
Upper
Oven
Hinge
Upper Oven
Hinge
FRONT DOOR GLASS REMOVAL
(After DOOR PANEL REMOVAL)
12.Remove the four (4) screws holding the glass stopper
U to the door frame and remove the glass stopper U.
13.Remove the two (2) screws holding the glass stopper
R to the door frame and remove the glass stopper R.
14.Slide the front door glass left at first and then slide
upwards to release it from the tabs holding it.
17.Now, the front door glass is free
Door
Panel
Lower
Oven
Hinge
Choke Cover
DOOR CASE REMOVAL
(After DOOR PANEL REMOVAL)
12.Straighten all tabs of the door case holding the door
case to the door frame.
13.Release door case from the door frame.
17.Now, the door case is free
Pin
NOTE: At this moment, the door badge is attached on the
door case.
Lower
Oven
Hinge
Figure C-7. Door Replacement
24
R-21AT
INSTALLATION OF CERAMIC SHELF
1. Disconnect the oven from the power supply.
2. Open the oven door and wedge it open.
3. Make sure that the smooth surface of the ceramic shelf
face up.
4. Make sure that the rubber packing without a fin of the
ceramic shelf faces the front of the oven.
NOTE: The three (3) rubber packings with the fins and the
one (1) rubber packing without a fin are attached
to the four (4) edges of the ceramic shelf. The one
(1) rubber packing without a fin is the front edge of
the ceramic shelf.
5. Put the front edge of the ceramic shelf into the front
edge of the oven cavity bottom plate.
6. Push down the rear edge of the ceramic shelf into the
oven cavity bottom plate.
7. Now, the ceramic shelf is installed.
WARNING
Make sure that the rubber packing is not caught between the oven door and the oven cavity front plate, to
avoid possible exposure to excessive microwave energy.
Oven Cavity
Rear Edge
Push
Front Edge
Ceramic
Shelf
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.
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
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.
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.
25
N
EARTH
G-Y
LIVE
A5
26
2ND. INTERLOCK RLAY
CONTROL SWITCH
B2
B1
FAN MOTOR
1ST. INTERLOCK
SWITCH
Figure O-2 Oven Schematic-Cooking Condition
LATCH
SWITCH
H.V. RECTIFIER
CAPACITOR
1.07µF
AC2400V
A7
H.V. FUSE
0.75A
MAGNETRON
FAN MOTOR
AM
H.V. RECTIFIER
CAPACITOR
1.07µF
AC2400V
H.V. FUSE
0.75A
MONITOR SWITCH
ANTENNA MOTOR
OL
FM
L
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
MONITOR
RESISTOR
0.8/20W
RY-2
RY-3
DISCHARGE
RESISTOR 10MΩ
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
FUSE
M10A
A7
HIGH VOLTAGE
TRANSFORMER
MONITOR
RESISTOR
0.8/20W
1ST. INTERLOCK
SWITCH
MONITOR SWITCH
AM
OVEN LAMP
B1
ANTENNA MOTOR
B2
OL
2ND. INTERLOCK RLAY
CONTROL SWITCH
FM
A5
OVEN LAMP
CONTROL
UNIT
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
LINE CROSS CAPACITOR 0.068µF/ AC 250V
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 680 kΩ
LIVE
NOTE:
RY-2
NOISE FILTER
RY-3
N
EARTH
G-Y
˜ 50Hz
BRN
230 - 240V
NOISE FILTER
DISCHARGE
RESISTOR 10MΩ
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
L
NEUTRAL
BLU
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2.
:
APPEAR ON DISPLAY.
CONTROL
UNIT
LINE BYPASS
CAPACITOR
0.0033µF/ AC 250V
LINE CROSS CAPACITOR 0.068µF/ AC 250V
NOISE SUPPRESSION COIL
FUSE
M10A
˜ 50Hz
BRN
230 - 240V
DISCHARGE RESISTOR 680 kΩ
NEUTRAL
BLU
R-21AT
Indicates components with potential above 250 V.
THERMAL
THERMAL
CUT-OUT
CUT-OUT
125˚C (OVEN) 145˚C (MG)
LATCH
SWITCH
Figure O-1 Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. "SELECT TIME" PAD TOUCHED.
3. COOKING TIME ENTERED.
4. START PAD TOUCHED.
THERMAL
THERMAL
CUT-OUT
CUT-OUT
125˚C (OVEN) 145˚C (MG)
H
2
CN-G
T1
IC1
CONTROL UNIT
2
1
1
RY3 RY2
PNK
PNK
YLW
ORG
YLW
YLW
BLK
G
7
5 WHT
4
3
2
1 PNK
CN-A
2 GRY
1 GRN
CN-B
3
27
4
WHT
5
WHT
WHT
GRY
N.O.
GRN
GRY
RED
WHT
E
YLW
Figure S-1. Pictrorial Diagram
WHT
ANTENNA
MOTOR
THERMAL CUT-OUT
125˚C(OVEN)
BRN
OVEN LAMP
AND SOCKET
ORG
BLACK MARK
BLK
WHT
N
L
BRN
EARTH
G-Y
WHT
WHT
RED
RED
WHT
RED
ORG
ORG
ORG
BRN
PNK
NEUTRAL
FAN MOTOR
MONITOR
RESISTOR
THERMAL
CUT-OUT
145°C(MAG.)
POWER TRANSFORMER
H.V.
CAPACITOR
H.V. FUSE
MAGNETRON
HIGH VOLTAGE COMPONENTS
RED
WHT
BLU
LIVE
POWER SUPPLY
CORD
4
COM.
COM.
N.O.
2ND. INTERLOCK
RELAY CONTROL
SWITCH (Oven side)
ORG
N.C.
GRY
COM
WHT
WHT
GRY
GRY
N.O.
MONITOR
SWITCH
COM.
NOTE:
Neutral (ORG) wire must
be connected to the
terminal with black mark
on the oven light socket.
3
LATCH
SWITCH
(Cabinet side)
G G
R R
N N
F
2
1
C
CN-B
B
CN-A
1
H.V.
RECTIFIER
D
1ST. INTERLOCK
SWITCH
R-21AT
5
6
A
A
6
B
C
D
E
F
G
H
HIGH VOLTAGE
TRANSFORMER
OVEN LAMP
ANTENNA
MOTOR
FAN MOTOR
TARNTABLE
MOTOR
AC230-240V
50Hz
COM
N.O.
COM
N.O.
A7
(J1)
b
c
a
d
R90 100 1w
10G471K
RY2
RY3
Q24
2SC1740S
C10
470µ
/25v
–
+
JA
R6 1k
HZ20-1
ZD3
28
D23
Q22
DTD143ES
C13 10µ/25v
–
+
4
D70
R71 4.7k
IC2
A0 1 8 VCC
A1
TEST
SCL
A2
VSS 4 5 SDA
X24C02P
Q21
DTC143ES
R30 100
C20
0.1µ/50v
R32 2.7k
+
5
C7
CF1
CST4.00MGW
VCC
VEE
AVSS
VREF
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P43
P42
INT1
P40
RESET
P71
P70
XIN
XOUT
VSS
R40 2.7k
R3 4.7k
R5 4.7k
ON
IC3
P30
P31
P32
P33
P34
P35
P36
P37
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
G12
G11
G10
G9
DEF.
G1
LED1
G2
NO.
G3
X2
CHECK
7
8
20
19
18
17
0
9
8
7
G4
1
6
14
13
15
26
EXPRESS
DEFROST
SELECT
TIME
4
3
DOUBLE
QUANTITY
SELECT
POWER
5
G6
R86 4.7k
G5
: IF NOT SPECIFIED. 1/4W ± 5%
: IF NOT SPECIFIED. 1SS270A
12
11
2
1
STOP/
CLEAR
START
G7
: IF NOT SPECIFIED. 0.01µ / 16v
SIGNAL
CHECK
SET
G8
5
R83 4.7k
R82 4.7k
R81 4.7k
R80 4.7k
IC1
IZA897DR
Figure S-2. Control Panel Circuit
–
(J6)
R33 4.7k
(J4)
(J5)
D2
HZ4A2
(J3)
SP1
D
DOOR
SWITCH
B2
C2 0.1µ/50v
+ C21
10µ/25v
–
C3 47µ/10v
Q3
DTC143ES
–
+
Q2
DTA123ES
LIGHT EMITTING DIODE
4
B1
–
+
Q20
DTB143ES
D2
D1
C11 470µ/50v
D6 11ES1
Q1 KIA7805P1
C1 2200µ/25v
C31
D4
D5 11ES1
–
–
13
12
11
10
D3
R4 4.7k
+
+
C4 0.1µ/50v
–
A5
D20
D21
C9
0.1µ
/50v
C30 47µ/10v
C8 0.1µ/50v
+
T1
E
R70 4.7k
3
R31 15k
5
A3
C5 47µ/10v
2
C6 0.1µ/50v
6
R88 4.7k
01
02
03
04
05
06
07
11 1 16
12
13
14
15
16
17
GND 8 9
4
1
3
2
H
R50 100
R51 100
R52 100
R53 100
R54 100
R55 100
R56 100
R57 100
R58 100
G
R87 4.7k
F
9
B
3
C70
A
R84 4.7k
C
2
NOTE :
1
R85 4.7k
D1-4
11ES1
R-21AT
6
A
B
C
6
D
E
F
G
H
VRS1
R-21AT
1
2
4
3
5
6
A
A
1
13
DIP
F
R33
R32
R3
C7
3
1
2
16
ZD2
Q2
1
(CN - D)
IC3
15
(4)
5
6
(J3)
(J4)
7
60
64
3
SP1
(JA)
(Q23)
D22
MICRO 2
(R1)
Q1
E
(ZD1)
(R2)
(R101)
B
C1
11
(15)
(16)
E
Q3
C2
C9
(TB1)
F
(CT1)
(17)
1
8
7
(J1)
P
VRS1
S
P
12
T1
1
(C12)
(RY1)
(D20)
C20
C21
B
CN - A
D3
D4
D2 D1
B
(C10)
(D5)
OL SM TTM
(VRS2) POWER
POWER
(J2)
6
4
(ZD3)
(R6)
(Q24)
E
E
H
F
G
13
(D6)
Q21
B Q20 E
(C13)
DANGER-CERTAIN PART IS INTENTIONALLY NOT GROUNDED
AND MAY PRESENT A RISK OF ELECTRICAL SHOCK DURING
SERVICING. SERVICE PERSONNEL - DO NOT CONTACT THE
FOLLOWING PARTS WHILE THE APPLIANCE IS ENERGIZED ;
TRANSFORMER
(14)
(C100)
(TB2)
(D100) (R100)
RY3
G
D
R40
10
(JB) (J9)
(D10)
D21 E
MICRO 1
RY2
(C10)
B
Q22 (R102) E
B
(JF)
(C63)
C8
R4
(J5)
C3
(JE)
(C64)
(R65)
(J6)
C4
(JC)
1
C70
R70
(R67)
9
8
55
(C62)
1
CN - B
(CN - H)
(R64)
(R63)
9
(C101)
(C60)
(JD)
(R61)
R71
C
(R66)
8 (JH)
(R68)
(R62)
D23
E
E
B
(JJ)
(JG)
D70
3
D
5
20
50
R84
(R60)
C6
3
25
IC1
12
(R69)
(C60)
C5
32
40
CN - G
(R91)
(R90)
(R89)
R88
R87
R86
R85
B
C30
R5
33
1
C
R31
4
(Q60) B
R83
(C83)
R82
(C82)
R81
(C81)
R80
(C80)
R58
R57
R56
R55
R54
R53
R52
R51
R50
8
B
IC2
C31
E
1
R30
(C11)
(R90)
H
Figure S-3. Printed Wiring Board
1
2
4
3
29
5
6
R-21AT
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY
CODE
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AF
AF
AF
AW
AT
BE
AU
AK
AG
AK
AR
AP
AK
BQ
BN
AQ
AE
AT
1
1
1
2
1
BH
AV
AQ
AC
AF
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
6
2
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
9
2
9
BL
AC
AB
AF
AE
AA
AA
AA
AA
AA
AA
AA
AC
AE
AA
AM
AA
AA
AA
AA
AD
AB
AA
AA
AA
AV
AL
AE
AS
AE
AA
AB
AC
AB
AC
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
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
QSW-MA086WRE0
QSW-MA085WRE0
QSW-MA095WRE0
QACC-A088WRE0
FH-DZA086WRK0
RC-QZA247WRE0
RMOTEA378WRE0
RR-WZA022WRE0
QSOCLA022WRE0
RLMPTA069WRE0
RMOTDA234WRE0
RTHM-A080WRE0
RTHM-A096WRE0
RTRN-A574WRE0
RV-MZA197WRE0
QFS-IA002WRE0
QFS-CQ001YBE0
FPWBFA325WRK0
Monitor switch
2nd. interlock relay control switch
1st. interlock switch and latch switch
Power supply cord
High voltage rectifier assembly
High voltage capacitor
Fan motor
Monitor resistor 0.8 ohm 20 W
Oven lamp socket
Oven lamp
Antenna motor
Thermal cut-out 145 deg. (MAG)
Thermal cut-out 125 deg. (OVEN)
High voltage transformer
Magnetron
High voltage fuse
Fuse 10A
Noise filter
22222-
GCABUA672WRP0
GDAI-A318WRW0
GCOVHA406WRW0
GLEGPA074WRE0
GLEGPA076WRF0
Outer case cabinet
Base plate
Base plate cover
Foot
Leg
CPWBFA819WRK0
QCNCMA234DRE0
QCNCMA275DRE0
QCNCWA057DRE0
VCEAB51EW228M
RC-KZA087DRE0
VCEAB31AW476M
RC-KZA087DRE0
VCEAB31AW476M
RC-KZA087DRE0
VCKYD11CY103N
RC-KZA087DRE0
VCEAB31EW477M
VCEAB31HW477M
VCEAB31EW106M
VCEAB31HW104M
VCEAB31EW106M
VCEAB31AW476M
VCKYD11CY103N
VCKYD11CY103N
RCRS-A012DRE0
VHD11ES1///-1
VHD1SS270A/-1
VHD1SS270A/-1
VHD1SS270A/-1
RH-IZA897DRE0
RH-IZA521DRE0
RIC--A025BDE0
VHPSL3966T/1B
RIC--A022BDE0
VSDTA123ES/-3
VSDTC143ES/-3
VSDTB143ES/-3
VSDTC143ES/-3
VSDTD143ES/-3
VS2SC1740S/-3
VRD-B12EF472J
VRD-B12EF102J
VRD-B12EF101J
VRD-B12EF153J
VRD-B12EF272J
VRD-B12EF472J
VRD-B12EF272J
VRD-B12EF101J
VRD-B12EF472J
VRD-B12EF472J
Control unit
3-pin connector (A)
2-pin connector (B)
12-pin connector (G)
Capacitor 2200 uF
25V
Capacitor
0.1 uF
50V
Capacitor
47 uF
10V
Capacitor
0.1 uF
50V
Capacitor
47 uF
10V
Capacitor
0.1 uF
50V
Capacitor 0.01 uF
16V
Capacitor
0.1 uF
50V
Capacitor
470 uF
25V
Capacitor
470 uF
50V
Capacitor
10 uF
25V
Capacitor
0.1 uF
50V
Capacitor
10 uF
25V
Capacitor
47 uF
10V
Capacitor 0.01 uF
16V
Capacitor 0.01 uF
16V
Ceramic resonator CST4.00MGW
Diode (11ES1)
Diode (1SS270A)
Diode (1SS270A)
Diode (1SS270A)
LSI
IC (X24C02P)
IC (KID65004AP)
Light emitting diode
IC (KIA7805P1)
Transistor (DTA123ES)
Transistor (DTC143ES)
Transistor (DTB143ES)
Transistor (DTC143ES)
Transistor (DTD143ES)
Transistor (2SC1740)
Resistor
4.7k ohm
1/4W
Resistor
1k ohm
1/4W
Resistor
100 ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
2.7k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
2.7k ohm
1/4W
Resistor
100 ohm
1/4W
Resistor
4.7 ohm
1/4W
Resistor
4.7 ohm
1/4W
CABINET PARTS
1
2
3
4
5
CONTROL PANEL PARTS
3- 1
3- 1A
3- 1B
3- 1C
C1
C2
C3
C4
C5
C6
C7
C8-9
C10
C11
C13
C20
C21
C30
C31
C70
CF1
D1-6
D20-21
D23
D70
IC1
IC2
IC3
LED1
Q1
Q2
Q3
Q20
Q21
Q22
Q24
R3-5
R6
R30
R31
R32
R33
R40
R50-58
R70-71
R80-88
30
R-21AT
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
R90
RY2
RY3
SP1
T1
VRS1
ZD2
ZD3
3- 2
3- 2-1
3- 2-2
3- 2-3
3- 3
PART NO.
VRS-B13AA101J
RRLY-A092DRE0
RRLY-A093DRE0
RALM-A014DRE0
RTRNPA131DRE0
RH-VZA032DRE0
VHEHZ4A2///-1
VHEHZ201///-1
FPNLCB403WRK0
FUNTKA899WRE0
GCOVAA260WRP0
GMADIA109WRF0
XEPSD30P08XS0
DESCRIPTION
1W
Resistor
100 ohm
Relay (VRB18SP)
Relay (VRB18)
Buzzer (PKM22EPT)
Touch control transformer
Varistor (10G471K)
Zener diode (HZ4A2)
Zener diode (HZ20-1)
Control panel frame with key unit
Key unit
C/P case
Display window
Screw; 3mm x 8mm
Q'TY
1
1
1
1
1
1
1
1
1
1
1
1
6
CODE
AA
AL
AL
AG
AR
AE
AA
AA
BB
AV
BA
AE
AA
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
3
2
1
1
1
1
BL
BU
AF
AF
AF
AC
AC
AL
BL
AY
AR
AK
AM
BB
AC
AL
AC
AL
AK
AM
AF
AD
AF
AA
AE
AC
AC
AB
AP
AD
AK
AD
AD
AC
AB
AD
AL
1
1
1
1
1
1
1
6
1
1
1
2
1
1
1
2
2
2
1
4
1
1
AZ
AB
AW
BG
AK
AN
AQ
AA
AQ
AN
AR
AL
AD
AC
AA
AF
AE
AE
AC
AA
AK
AG
OVEN PARTS
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
∆ 4- 8
4- 9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
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
FGLSPA062WRE0
DOVN-A514WRY0
MLEVPA227WRF0
MLEVPA228WRF0
MLEVPA229WRF0
MSPRCA108WRE0
MSPRTA191WRE0
PHOK-A107WRF0
FDUC-A341WRY0
PSKR-A351WRP0
LBNDKA139WRW0
NFANJA029WRE0
PDUC-A697WRF0
FPLT-A007WRY0
PCUSUA507WRP0
PCUSGA378WRP0
PSPA-A112WRE0
LANGFA187WRP0
NSFTPA033WRF0
PSKR-A359WRW0
PSKR-A349WRP0
PFILWA060WRP0
PDUC-A722WRF0
PCUSGA249WRP0
PCUSUA235WRP0
PCUSUA511WRP0
PCUSUA329WRP0
PCUSUA514WRP0
PPACGA073WRE0
PCUSUA515WRP0
PSHEPA668WRE0
PCLICA034WRE0
PCLICA032WRE0
PCUSUA173WRP0
PCUSUA278WRP0
PSHEPA673WRE0
PSHEPA674WRE0
Ceramic shelf
Oven cavity
Latch switch lever A
Latch switch lever B
Latch switch lever C
Latch lever spring
Switch lever B spring
Latch hook
Steam duct sub assembly
Steam guide
HV capacitor holder
Fan blade
Fan duct
Stirrer antenna assembly
Cushion
Cushion
Mica washer
Chassis support
Antenna motor shaft
Air guide
Steam duct barrier
Lamp filter
Air intake duct
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Cover
Hand clip
Hand clip
Cushion
Cushion
S/Film
Cover
∆ 5- 1
5- 2
∆ 5- 3
5- 4
5-4-1
5-4-2
5-4-3
5-4-4
5- 5
5- 6
∆ 5- 7
∆ 5- 8
5- 9
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-17
5-18
FDORFA322WRT0
PSHEPA649WRE0
FANGKA206WRY0
FCOV-A004WRK0
LSTPPA180WRF0
LSTPPA182WRF0
PGLSPA522WRE0
XCPSD40P08000
GWAKPA580WRM0
JHNDMA040WRW0
LANGKA874WRW0
LSTPPA181WRF0
MSPRTA190WRE0
PCUSUA506WRP0
XCPSD40P06000
LSUB-A083WRE0
LSUB-A084WRE0
LSUB-A085WRE0
PCUSUA505WRP0
XCPSD40P08000
GCOVHA395WRF0
HBDGCA087WRE0
Door panel assembly
Sealer film
Latch angle assembly
Door case assembly
Glass stopper R
Glass stopper U
Front door glass
Screw : 4mm x 8mm
Door handle
Handle lever
Latch lever
Latch head
Latch spring
Cushion
Screw : 4mm x 6mm
Sealed plate A
Sealed plate B
Sealed plate C
Cushion
Screw : 4mm x 8mm
Choke cover
Door badge
∆
∆
∆
∆
DOOR PARTS
31
R-21AT
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
5-19
5-20
5-21
XEPSD40P25K00
PCUSUA508WRP0
PCUSGA514WRP0
Screw : 4mm x 25mm
Cushion
Cushion
6666666-
1
2
3
4
5
6
7
TINSEA781WRR0
FW-VZB719WRE0
PZETEA076WRE0
TCAUHA214WRR0
TSPCNC700WRR0
TLABMA585WRR0
TCAUAA249WRR0
Instruction book
Main wire harness
Switch insulator
K caution label
Rating label
Menu sticker
Caution label
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
7-11
7-12
7-13
7-14
XHPSD40P08K00
XEPSD40P25000
XOTSD40P12RV0
LX-CZA052WRE0
LX-EZA042WRE0
XBPWW40P04000
XFPSD40P08000
XBPSD30P28KS0
XHPSD30P08000
XHTSD40P08RV0
XOTSD40P12000
XOTSE40P08000
XOTWW40P10000
XNESD30-24000
Screw : 4mm x 8mm
Screw : 4mm x 25mm
Screw : 4mm x 12mm
Special screw
Special screw
Screw : 4mm x 4mm
Screw : 4mm x 8mm
Screw : 3mm x 28mm
Screw : 3mm x 8mm
Screw : 4mm x 8mm
Screw : 4mm x 12mm
Screw : 4mm x 8mm
Screw : 4mm x 10mm
Nut : 3mm x 2.4mm
Q'TY
CODE
2
1
1
AB
AC
AG
1
1
1
1
1
1
1
AQ
AY
AC
AC
AE
AG
AE
9
2
12
2
2
1
1
1
1
4
2
1
4
1
AA
AA
AA
AA
AB
AB
AA
AA
AA
AA
AA
AA
AA
AA
MISCELLANEOUS
“SCREWS,NUTS AND WASHERS
HOW TO ORDER REPLACEMENT PARTS
To have your order filled prompty and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO.
4. DESCRIPTION
TOP PAD ASSEMBLY
PACKING AND ACCESSORIES
(FPADBA385WRK0)
WRAP COVER
(SSAKHA034WRE0)
TRAY HOLDER
DOOR PROTECTION SHEET
(SPADFA435WRE0)
(SPADPA204WRE0)
6-6 MENU STICKER
6-1 INSTRUCTION BOOK
the avity
Into en C
v
O
BOTTOM PAD ASSEMBLY
(FPADBA386WRK0)
PACKING CASE
Not Replaceable Items.
SPAKCD183WRE0
32
R-21AT
2
1
4
3
6
5
OVEN AND CABINET PARTS
7-3
A
A
7-3
2-1
7-3
1-10
1-9
4-23
B
7-13
7-3
B
4-9
4-10
7-13
7-6
4-21
1-4
7-12
C
7-13
7-1
4-26
4-17
6-4
1-13
4-26
C
4-27
4-35
1-4
4-28
1-17
4-14
7-1
7-10
D
1-18
1-8
4-15
4-2
7-10
7-9
7-3
4-25
D
7-11
1-12
4-18
7-10
4-36
7-1
E
4-6
7-1
E
4-20
6-7
4-19
7-1
7-4
1-7
1-15
4-3
1-11
1-3
1-1
4-8
7-2
4-13
7-4
6-2
4-1
4-34
7-7
4-22
7-1
1-6
4-7
7-14
4-37
F
4-12
4-4
F
4-6
2-2
1-2
4-33
4-5
1-5
1-3
6-3
7-8
4-29
4-11
7-1
7-5
7-3
G
1-16
1-14
G
2-4
7-3
4-16
4-30
2-4
2-3
7-11
x2
4-24
7-10
2-5
4-31
H
4-32
x3
1
2
H
7-3
4
3
33
5
6
R-21AT
2
1
4
3
6
5
3-1
CONTROL PANEL PARTS
A
A
3-3
3-2
3-3
3-2-3
3-3
B
B
3-2-2
3-3
6-5
C
C
DOOR PARTS
3-2-1
5-15
5-21
D
5-17
5-16
D
5-13
5-2
5-16
5-20
5-4-2
E
5-16
5-13
5-4-4
E
x4
5-4
5-1
5-4-1
5-4-3
5-4-4
x2
5-16
5-12
5-14
F
F
5-8
5-7
5-19
5-9
5-18
5-12
5-11
5-3
5-8
5-19
G
G
5-6
5-5
MISCELLANEOUS
5-10
6-2
H
H
Actual wire harness may be different from illustration.
1
2
4
3
5
6
'98SHARP CORP. (11S0.520E) Printed in Japan.
34
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