Sharp R-2397 Service manual

R-2397
SERVICE MANUAL
S5708R2397H/X
COMMERCIAL
MICROWAVE OVEN
MODEL
R-2397
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
CAUTION, MICROWAVE RADIATION ...................................................................................................... 1
WARNING ................................................................................................................................................... 1
PRODUCT SPECIFICATIONS ................................................................................................................... 2
GENERAL IMPORTANT INFORMATION ................................................................................................... 2
APPEARANCE VIEW ................................................................................................................................. 3
OPERATION SEQUENCE ......................................................................................................................... 4
FUNCTION OF IMPORTANT COMPONENTS .......................................................................................... 5
SERVICING ............................................................................................................................................... 7
TEST PROCEDURE ................................................................................................................................ 10
TOUCH CONTROL PANEL ASSEMBLY .................................................................................................. 17
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..................................................... 24
MICROWAVE MEASUREMENT .............................................................................................................. 29
WIRING DIAGRAM .................................................................................................................................. 30
PICTORIAL DIAGRAM ............................................................................................................................. 31
CONTROL PANEL CIRCUIT .................................................................................................................... 32
PRINTED WIRING BOARD ...................................................................................................................... 33
PARTS LIST ............................................................................................................................................. 34
SHARP CORPORATION
R-2397
R-2397
SERVICE MANUAL
PRODUCT SPECIFICATIONS
COMMERCIAL
GENERAL INFORMATION
R-2397
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
DO NOT BECOME EXPOSED TO RADIATION FROM
THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
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.
APPEARANCE VIEW
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
SERVICING AND
TROUBLESHOOTING CHART
TEST PROCEDURE
TOUCH CONTROL PANEL
ASSEMBLY
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.
COMPONENT
REPLACEMENT AND
ADJUSTMENT PROCEDURE
MICROWAVE MEASUREMENT
Servicing and repair work must be carried out only by trained
service engineers.
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.
SHARP CORPORATION
OSAKA, JAPAN
1
PARTS LIST
R-2397
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
230 Volts
50 Hertz
Single phase, 3 wire grounded
Power Consumption
2.7 kW Approx. 13A
Power Output
1700 watts nominal of RF microwave energy (Method of IEC 705)
Operating frequency of 2450MHz
Outside Dimensions
Width 510mm
Height 335 mm
Depth 470 mm
Cooking Cavity Dimensions
Width 330 mm
Height 180 mm
Depth 330 mm
Control Complement
Touch Control System
The combination of cooking time and microwave power
The oven can be programmed a series of up to 3 cookling stages.
The combination of microwave power and cooking time that can be input as
folllows.
Cooking
Sequence
1 Stage only
Micrwave power level
that can be used.
0-100%
0-40% all stages
2 or 3 Stage
50-100%
Cooking time that can be iused.
Max. 30 minutes
Max. 30 minutes any stages
Max. 60 minutes for 2 stages
Max. 90 minutes for 3 stages
Max. 30 minutes for 3 stages
NOTE: If the oven used with the power level above 40% on any stage, the
maximum cooking time is 30 minutes in total.
Microwave Power level
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
MANUAL / REPEAT key, NUMBER keys
MICROWAVE POWER SETTING key
STOP / CLEAR key, START Key
DOUBLE QUANTITY key, DEFROST key
SET key, CHECK key, VOLUME key
Set Weight
Approx. 33kg
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-2397
APPEARANCE VIEW
OVEN
10
11
1. Control panel
5
4
3
2
19
14
18
2. Hole for safety door latches
3. Ceramic floor
1
13
4. Splash cover
15
5. Oven light
6. Air intake filter
8
16
7. Air intake openings
12
8. Oven cavity
9
6
7
9. Door seals and sealing surfaces
17
10. Door hinges
11. Oven door with see-through window
12. Door safety latches
AUTO TOUCH CONTROL PANEL
13. Door handle.
3 4
14. Outer cabinet
15. Removable cover over oven light bulb
16. Air vent openings
17. Power supply cord
18 Mounting plate
2
1
11
6
DEF CHECK POWER
NUMBER
ON 1 2 3
5
7
8
9
%
DOUBLE FILTER
10
19 Screw for mounting plate
DISPLAY AND INDICATORS
Check indicators after the oven starts to
confirm the oven is operating as desired.
1. Heating indicator
This indicator shows cooking in progress.
2. Memory number indicator
12
13
x2
3. Defrost indicator
4. Check mode indicator
5. Power level display
11
1
12
2
7. Filter indicator
13
3
8. Double quantity mode indicator
14
4
9. 3rd. stage indicator
10. 2nd. stage indicator
15
5
16
6
17
7
18
8
14. NUMBER keys
19
9
15. MANUAL/ REPEAT key
20
0
16. STOP/CLEAR key
17. MICROWAVE POWER SETTING key
6. Time display
14
11. 1st. stage indicator
OPERATING KEYS
12. DOUBLE QUANTITY key
13. DEFROST key
18. START key
15
16
19. SET key
17
18
20. VOLUME key
19
20
21. CHECK key
21
INSTALLATION INFORMATION
When this commercial microwave oven is installed near other commercial electrical appliances, connect a lead wire
to each equivalent potential terminal with equipotential marking between them (insert a lead wire between a washer and
an earth angle, and screw them), as shown in Fig. A-1, to make sure that they are at equivalent potential.
If any lead wire is not connected between them, when person touch them he/she will get a electric shock.
Equipotential marking
COMMERCIAL MICROWAVE OVEN
Lead wire
OTHER COMMERCIAL
ELECTRICAL APPLIANCE
Screw
Washer
Equivalent
potential terminal
Earth angle
(Equivalent potential terminal)
Lead wire
Figure A-1
3
R-2397
OPERATION SEQUENCE
OFF CONDITION
the relay RY1 stays closed. Shown in the display is the
remaining time, but the program is cancelled if the oven
is not started within 3 minutes.
Closing the door activates all door interlock switches
(1st latch switch, 2nd latch switch, 3rd latch switch and stop
switch)
6. MONITOR SWITCH CIRCUIT
The monitor switch is mechanically controlled by oven
door, and monitors the operation of the 1st latch switch.
6-1. When the oven door is opened during or after the cycle
of a cooking program, the 1st, 2nd, 3rd latch and stop
switches 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 (COM-NC)
of the monitor switch must be opened first. After that
the contacts (COM-NO) of the 1st, 2nd, 3rd latch and
stop switches must be closed.
6-3. When the oven door is opened and the contacts of the
1st latch switch remain closed, remains closed, the
fuse F6.3A will blow, because the monitor switch is
closed and a short circuit is caused.
IMPORTANT
When the oven door is closed, the monitor switch contacts
COM-NC must be open. When the microwave oven is
plugged in a wall outlet (230 volts, 50Hz), the line voltage is
supplied to the point A5+A7 in the control panel.
Figure O-1 on page 30
1. The digital display shows
.
NOTE: When the door is opened or after cooking, oven
lamp, blower motor and stirrer motors work for 1
minute.
MICROWAVE COOKING CONDITION
Touch MANUAL/ REPEAT key and enter a desired cooking
time with the touching NUMBER key. And then touch START
key.
MICROWAVE VARIABLE COOKING
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the high voltage
transformers intermittently within a 48 second time base
through the contacts of the relays RY3+RY4.
The following levels of microwaves power are given.
Function sequence Figure O-2 on page 30
CONNECTED COMPONENTS
Oven lamp/ Blower motor/ Stirrer motors
Power transformer (rear)
Power transformer (front)
RELAY
RY1
RY3
RY4
48 sec. ON
Number key
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 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 RY3+RY4 go back to their home position. The
circuits to the high voltage transformers. The relay RY1
remains and oven lamp, blower motor and stirrer motors
work for 1 minute.
5. When the door is opened during a cook cycle, the
switches come to the following condition.
SWITCH
1st latch switch
Monitor switch
2nd latch switch
Stop switch
3rd latch switch
CONTACT
COM-NO
COM-NC
COM-NO
COM-NO
COM-NO
44sec. ON
Number key 9
40 sec. ON
Number key 8
36 sec. ON
Number key 7
32 sec. ON
Number key 6
26 sec. ON
Number key 5
22 sec. ON
Number key 4
16 sec. ON
Number key 3
12 sec. ON
Number key 2
8 sec. ON
Number key 1
0 sec. ON
Number key 0
CONDITION
DURING
DOOR OPEN
COOKING
(NO COOKING)
Closed
Open
Open
Closed
Closed
Open
Closed
Open
Closed
Open
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.
TWO MAGNETRON OPERATION SYSTEM
Two magnetrons MG1+MG2 are equipped in order to get
higher microwave power output. The primary windings of the
high voltage transformers T1+T2 are connected so that each
magnetron can be oscillated alternatively according to the
frequency of the power supply. Refer to the Figure 1 and 2.
The circuits to the high voltage transformers are cut off
when the 1st latch, 2nd latch, 3rd latch and stop switches
are made open. The blower motor, stirrer motors and
oven lamp remains on even if the oven door is opened
after the cooking cycle has been interrupted, because
4
R-2397
T2: HIGH VOLTAGE
TRANSFORMER
(FRONT)
T1: HIGH VOLTAGE
TRANSFORMER
(REAR)
C1: H.V. CAPACITOR
ASYMMETRIC
RECTIFIER
C2: H.V. CAPACITOR
ASYMMETRIC
RECTIFIER
H. V. RECTIFIER
COMMERCIAL
FREQUENCY
(50HZ)
POWER OUTPUT
BY MAGNETRON 1
OPERATION OF
MAGNETRON
H. V. RECTIFIER
MG2: MAGNETRON (LOWER)
POWER OUTPUT
BY MAGNETRON 2
MG1: MAGNETRON (UPPER)
Figure B-1. High Voltage Circuit
Figure B-2. Operation of Magnetron
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
MONITOR SWITCH
1. The door release lever is pulled.
2. The upper latch head is lifted up by the linked door
release lever.
3. The latch lever is lifted up by the door release lever.
4. The joint lever is lifted up by the latch lever.
5. The lower latch head is lifted up by the joint lever.
6. Now both latch heads are lifted up, so they can be
released from the latch hook.
7. Now the door can be opened.
The monitor switch is activated (the contacts opened) the
upper latch head and switch lever A while the door is
closed. The switch is intended to render the oven inoperative by means of blowing the fuse F6.3A when the
contacts of the 1st latch switch fail to open when the door
is opened.
Door release
lever
Function
1. When the door is opened, the monitor switch contacts
close (to the ON condition) due to their being normally
closed. At this time the 1st 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 are opened and 1st latch switch contacts are closed (On opening the door, each of these
switches operate inversely.)
3. If the door is opened and the 1st latch switch contacts
fail to open, the fuse F6.3A blows simultaneously with
closing of the monitor switch contacts.
CAUTION:BEFORE REPLACING A BLOWN FUSE
F6.3A TEST THE 1ST LATCH SWITCH,
MONITOR SWITCH AND MONITOR RESISTOR FOR PROPER OPERATION. (REFER
TO CHAPTER “TEST PROCEDURE”).
Latch head
Monitor switch
Latch hook
2nd. latch switch
Joint lever
1st. latch switch
Stop switch
MONITOR RESISTOR
The monitor resistor prevents the fuse F6.3A 250V bursting when the fuse F6.3A 250V blows due to the operation
of the monitor switch.
Latch head
3rd. latch switch
Figure D-1. Door Open Mechanism
NOISE FILTER
1ST LATCH SWITCH, 2ND LATCH SWITCH, 3RD
LATCH SWITCH AND STOP SWITCH
The noise filter assembly prevents radio frequency interference that might flow back in the power circuit.
1. When the oven door is closed, the contacts COM-NO
must be closed.
2. When the oven door is opened, the contacts COM-NO
must be opened.
WEAK POINT
If the wire harness or electrical components make a shortcircuit, this weak point blows to prevent an electric shock
or fire hazard.
5
R-2397
FUSE F6.3A 250V
MAGNETRON THERMISTOR
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 1st latch switch remains
closed with the oven door open and when the monitor
switch closes.
The air temperature around the lower magnetron is
detected through the resistance of the thermistor.
If the temperature is high, the control panel will display
"EE17" and the oven will stop to protect the lower
magnetron against overheat.
If the thermistor is open, the control panel will display
"EE16" and the oven will stop.
ASYMMETRIC RECTIFIER
MAGNETRON THERMAL CUT-OUTS 145˚
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 weak point when the high voltage rectifier is
shorted.
A
D2
These thermal cut-outs protect the magnetrons against
overheat. If their temperature go up higher than 145˚C
because the blower motor is interrupted, the ventilation
openings are blocked, the thermal cut-outs will open and
the line voltage to the high voltage transformer will be cut
off and the operations of the magnetrons will be stopped.
The defective thermal cut-out must be replaced with new
rated one.
B
D1
ASYMMETRIC
RECTIFIER
C
HIGH VOLTAGE RECTIFIER
BLOWER MOTOR THERMAL CUT-OUT 115˚C
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.
1. The high voltage rectifier is shorted by some fault
when microwave 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 flow through the primary
winding of the high voltage transformer.
6. The weak point blows by the large electric currents.
7. The power supplying to the high voltage transformer
is cut off.
This thermal cut-out protect the blower motor against
overheat. If its temperature goes up higher than 115˚C
because the blower motor is locked or the ventilation
openings are blocked, the contacts of the thermal cut-out
will open and the line voltage to the control unit will be cut
off and the operation of the oven will be stopped. The
defective thermal cut-out must be replaced with new rated
one.
OVEN THERMAL CUT-OUT 115˚C
This thermal cut-out protects the oven against overheat. If
the temperature goes up higher than 115˚C because the
food catches fire, the contacts of thermal cut-out will open
and the line voltage to the control unit will be cut off and the
operation of the oven will be stopped. The defective thermal
cut-out must be replaced with a new rated one.
BLOWER MOTOR
The blower motor drives a blade which draws external
cool air. This cool air is directed through the air vanes
surrounding the magnetrons and cools the magnetrons.
This air is channelled through the oven cavity to remove
steam and vapours given off from the heating foods. It is
then exhausted through the exhausting air vents at the
oven cavity.
EXHAUST THERMISTOR
The thermistor is a negative temperature coefficient type.
The temperature in the exhaust duct is detected through
the resistance of the thermistor.
If the temperature is high, the control panel will display
“EE7” and the oven will stop to avoid overheating and
catching fire.
If the thermistor is open, the control panel will display
"EE6" and the oven will stop.
STIRRER MOTOR
The stirrer motor drives a stirrer antenna to stir the
microwave radiation from the waveguide.
INTAKE THERMISTOR
This thermistor detects ambient air temperature.
6
R-2397
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
HIGH-VOLTAGE CAPACITOR
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 tray, close the door and
press Manual / Repeat key and set the microwave time
for one (1) minute. Set the power level to 100% and push
the START button. When the one minutes has elapsed
(timer at zero) carefully check that the water is now hot.
If the water remains cold carry out 3D checks and reexamine the connections to the component being tested.
The high-voltage capacitor remains charged
about 60 seconds after the oven has been
switched off. Wait for 60 seconds and then shortcircuit the connection of the high-voltage capacitor
(that is, of the connecting lead of the high-voltage
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.
When all service work is completed, and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test carried out.
TROUBLESHOOTING GUIDE
IMPORTANT: If the oven becomes inoperative because
of a blown fuse F2 F6.3A in the 1st latch
switch - monitor switch - monitor resisitor
circuit, check the 1st latch switch, monitor
switch and monitor resistor before replacing the fuse F6.3A.
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.
7
A
B
B
C
C
C
D
D
E
E
E
E
E
F
F
G
HIGH VOLTAGE TRANSFORMER T1
HIGH VOLTAGE TRANSFORMER T2
H.V. RECTIFIER ASSEMBLY FOR MG1
H.V. RECTIFIER ASSEMBLY FOR MG2
H.V. WIRE HARNESS
H.V. CAPACITOR C1
H.V. CAPACITOR C2
1ST. LATCH SWITCH
2ND. LATCH SWITCH
3RD. LATCH SWITCH
MONITOR SWITCH
STOP SWITCH
WEAK POINT A018 F3
WEAK POINT A018 F4
WEAK POINT A017 F1
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
CONDITION
PPROBLEM
“ . “ does not appear on display when power
cord is plugged into wall outlet.
Control panel can not accept key in.
Fuse F6.3A blows when the door is opened.
Home fuse blowns when power cord is plugged
into wall outlet.
Weak point A017 blowns when power cord is
plugged into wall outlet.
OFF
CONDITION
Oven lamp, fan motor and stirrer motors do not
work for 1 minute whenever the door is opened
or after cooking.
Fuse F2 F6.3A blowns when power cord is
plugged into wall outlet.
Oven lamp does not light when door is opened.
(Blower and stirrer motors work)
Blower motor does not work when door is
opened. (Oven lamp lights and stirrer motors
work)
“EE 1” appear in display.
“EE 2” appear in display.
“EE 3” appear in display .
“EE 6” appear in display.
“EE 7” appear in display.
“EE 9” appear in display.
Oven lamp, blower motor and stirrer motors do
not work.
Oven lamp does not work.
Blower motor does not work.
Oven does not stop after end of cooking cycle or
when STOP/CLEAR key is touched. (Oven lamp,
blower motor and stirrer motors stop.)
ON
CONDITION
Home fuse blows when starting the oven.
Oven goes into cook cycle but shuts down
before end of cooking cycle.
Oven seems to be operating but no heat is
produced in oven load.
It passed more than 1 minute after cooking but
oven lamp, blower motor and stirrer motors do
not stop.
“EE 0” appear in display .
“EE 16” appear in display.
“EE 17” appear in display.
“EE 8” appear in display .
“EE 10” appear in display .
Stirrer motors do not work.
8
H
FUSE 6.3A F2
A
MAGNETRON MG2
TEST PROCEDURE
MAGNETRON MG1
R-2397
I
I
I
J
L
K
K
K
MAGNETRON THERMAL CUT-OUT 145˚C TC2
B. MOTOR THERMAL CUT-OUT 115˚C TC3
OVEN THERMAL CUT-OUTT 115˚C TC4
MONITOR RESISTOR R1
STIRRER MOTOR
MAGNETRON THERMISTOR
EXHAUST THERMISTOR
INTAKE THERMISTOR
M
NOISE FILTER
9
P
Q
RELAY RY-1, RY-3, RY-4
FOIL PATTERN
KEY UNIT
BLOCKED STIRRER ANTENNA
TEMPERATURE OF MAGNETRON THERMISTOR IS HIGH
TEMPERATURE OF INTAKE THERMISTOR IS HIGH
TEMPERATURE OF EXHAUST THERMISTOR IS HIGH
DUE TO PROGRAMME LOCK
OVER THE MAX. COOKING TIME
NO POWER AT WALL OUTLET
HOME FUSE OR BREAKER
MIS ADJUSTMENT OF SWITCHES
BLOCKED BLOWER MOTOR
BLOCKED VENTILATION OPENINGS
N
TOUCH CONTROL PANEL
OPENED WIRE HARNESS
SHORTED WIRE HARNESS
FUSE HOLDER
POWER SUPPLY CORD
L
BLOWER MOTOR
OVEN LAMP OR SOCKET
I
MAGNETRON THERMAL CUT-OUT 145˚C TC1
R-2397
O
R-2397
TEST PROCEDURES
PROCEDURE
LETTER
A
COMPONENT TEST
MAGNETRON TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL
WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECK.
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 (IEC-705-1988)
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 ............ 25 sec.
P=170x∆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 5K.
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 can be 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
heat-up time is not included.
NOTE: The operation time of the microwave oven is “t + 3” sec. (3 sec. is magnetron filament heatup time.) Therefore total reheating time = 28 seconds.
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.
10
R-2397
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Initial temperature............................................................................................... T1 = 11°C
Temperature after (25 + 3) = 28 sec. . ................................................................ T2 = 21°C
Temperature difference Cold-Warm ................................................................... ∆T = 10°C
Measured output power
The equation is “P = 170 x ∆T” .............................................. P = 170 x 10°C = 1700 Watts
JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 170 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚C
T2˚C
Heat up for 28 sec.
B
HIGH VOLTAGE TRANSFORMER TEST
WARNING: High voltages and large currents are present at the secondary winding and
filament winding of 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:
approx. 1.06 Ω
approx. 57.3 Ω
less than 1 Ω
a. Primary winding
b. Secondary winding
c. Filament winding
If the reading 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
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 infinity in one direction and more than 100 kΩ in the other direction.
A
CARRY OUT 4R CHECKS.
D2
D1
B
ASYMMETRIC
RECTIFIER
ASYMMETRIC RECTIFIER TEST
CARRY OUT 3D CHECKS.
C
11
HIGH VOLTAGE RECTIFIER
R-2397
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Isolate the high voltage rectifier assembly from the HV circuit. The asymmetric rectifier can be tested
using an ohmmeter set to its highest range. Contact the ohmmeter 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 an
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 CHECK.
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
COM; Common terminal
Plunger Operation
COM to NO
COM to NC
NO; Normally open terminal
Released
O.C.
S.C.
NC; Normally close terminal
Depressed
S.C.
O.C.
S.C.; Short circuit
O.C.; Open circuit
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
F
WEAK POINT A018
CARRY OUT 3D CHECKS.
If the weak point A018 is blown, there could be a short in the asymmetric rectifier or there is a ground
in wire harness. A short in the asymmetric rectifier may have occured 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: Only replace weak point A018 with the correct value replacement.
12
R-2397
TEST PROCEDURES
PROCEDURE
LETTER
G
COMPONENT TEST
WEAK POINT A017
CARRY OUT 3D CHECKS.
If the weak point A017 is blown, there could be 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: Only replace weak point A017 with the correct value replacement.
H
FUSE F6.3A TEST
CARRY OUT 3D CHECKS.
If the fuse F6.3A is blown when the door is opened, check the latch switch, monitor switch and
monitor resistor.
If the fuse F6.3 is blown by incorrect door switching replace the defective switch(s) and the fuse
F6.3A.
CARRY OUT 4R CHECKS.
CAUTION: Only replace fuse with the correct value replacement.
I
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 each two terminals as described in the table below.
CARRY OUT 4R CHECKS.
Table: Thermal Cut-out Test
Parts Name
Temperature of “ON”
condition (closed circuit).
(˚C)
Temperature of “OFF”
condition (open circuit).
Indication of ohmmeter
(When room temperature
(˚C) is
approx. 20˚C.)
Thermal cut-out 145˚C
This is not resetable type.
Above 145˚C
Closed circuit.
Thermal cut-out 115˚C
This is not resetable type.
Above 115˚C
Closed circuit
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit oven thermal cut-out 115˚C indicates that the oven cavity has over heated, this may
be due to no load operation.
An open circuit magnetron thermal cut-out 145˚C 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 blower motor thermal cut-out 115˚C indicates the blower motor winding has
overheated, this may be due to resisted ventilation or locked cooling fan.
J
MONITOR RESISTOR TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the monitor resistor. Using an ohmmeter and set on a low range. Check
between the terminals of the monitor resistor.
The resistance of monitor resistor should be read approx. 4.3Ω.
If incorrect readings are obtained, replace the monitor resistor.
CARRY OUT 4R CHECKS.
13
R-2397
TEST PROCEDURES
PROCEDURE
K
LETTER
MAGNETRON THERMISTOR TEST
COMPONENT TEST
CARRY OUT 3D CHECKS.
Disconnect connector-H from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.
Room Temp.
Resistance
15˚C ........................ Approx. 15.91 kΩ
20˚C ........................ Approx. 13.04 kΩ
25˚C ........................ Approx. 10.74 kΩ
If the meter does not indicate above resistance, replace the thermistor.
CARRY OUT 4R CHECKS.
EXHAUST THERMISTOR TEST
CARRY OUT 3D CHECKS.
Disconnect connector-B from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.
Room Temp.
Resistance
15˚C ........................ Approx. 77.45 kΩ
20˚C ........................ Approx. 61.47 kΩ
25˚C ........................ Approx. 49.12 kΩ
If the meter does not indicate above resistance, replace the thermistor.
CARRY OUT 4R CHECKS.
INTAKE THERMISTOR TEST
CARRY OUT 3D CHECKS.
Disconnect connector-D from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.
Room Temp.
Resistance
15˚C ........................ Approx. 15.88 kΩ
20˚C ........................ Approx. 13.03 kΩ
25˚C ........................ Approx. 10.74 kΩ
If the meter does not indicate above resistance, replace the thermistor.
CARRY OUT 4R CHECKS.
L
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals.
Resistance of Blower motor should be approximately 52Ω.
Resistance of Stirrer motor should be approximately 8.8 kΩ.
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
M
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.
14
R-2397
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
WHT
N
F1
L
L (min)
0.5mH
Cx
L
L
Cy
Cx ± 20%
0.22 µF
Cy ± 20%
4700 pF
BLK
MEASURING POINT
Between N and L
Between terminal N and WHITW
Between terminal L and BLK
INDICATION OF OHMMETER
Open circuit
Short circuit
Short circuit
If incorrect readings are absorbed, replace the noise filter.
CARRY OUT 4R CHECKS.
N
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, IC, etc.
Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with
only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided
into two units, Control Unit and Switch Unit, troubleshooting by unit replacement is described
according to the symptoms indicated.
1. Key Unit
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 the pads, sometimes a pad produces no signal.
2. Control Unit
The following symptoms may indicate a defective control unit. Replacing the control unit.
2-1 Programming problems.
a) When touching the pads, a certain group of pads do not produce a signal.
2-2 Display problems.
a) For a certain digit, all or some segments do not light up.
b) For a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Cooking is not possible.
Note: When defective components, (the Control Unit or Key Unit) are replaed, the defective part
or parts must be properly packed for return in the shipping carton. with its cushion material,
in which the new replacement part was shipped to you.
O
KEY UNIT TEST
f the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon is
making good contact, verify that the door sensing switch (stop switch ) operates properly; that is the
contacts are closed when the door is closed and open when the door is open. If the door sensing
switch (stop switch ) is good, disconnect the flat ribbon cable that connects the key unit to the control
unit and make sure the door sensing switch is closed (either close the door or short the stop switch
connector ). Use the key unit matrix indicated on the control panel schematic and place a jumper
wire between the pins that correG1
G4
G3
G2
G5
G7
G8
G6
spond to the STOP/CLEAR pad
making momentary contact. If the G 9
7
X2
control unit responds by clearing
8
with a beep, the key unit is faulty G 10
and must be replaced. If the conG 11
3
1
5
9
trol unit does not respond, it is
0
G 12
2
6
4
faulty and must be replaced.
15
R-2397
TEST PROCEDURES (CONT'D)
PROCEDURE
LETTER
COMPONENT TEST
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.
P
RELAY TEST
CARRY OUT 3D CHECKS.
Remove the outer case and check voltage between Pin Nos. 5 and 7 of the connector (A) on the
control unit with an A.C. voltmeter. The meter should indicate 230 volts, if not check control unit
circuity.
RY1, RY3 and RY4 Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ............................ Defective relay.
DC. voltage not indicated ...................... Check diode which is connected to the relay coil. If
diode is good, control unit is defective.
RELAY SYMBOL
RY1
RY3
RY4
OPERATIONAL VOLTAGE
APPROX. 19.0V D.C.
APPROX. 16.0V D.C.
APPROX. 18.0V D.C.
CONNECTED COMPONENTS
Oven lamp, Blower motor and Stirrer motor
Power transformer 1
Power transformer 2
CARRY OUT 4R CHECKS.
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 primary
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
1
OCCURANCE
CAUSE OR CORRECTION
The rated AC voltage is not present at
Check supply voltage and oven power cord.
POWER terminal of CPU connector (CN-A).
2
The rated AC voltage is present at primary
Low voltage transformer or secondary circuit defective.
side of low voltage transformer.
Check and repair.
3
Only pattern at "a" is broken.
*Insert jumper wire J24 and solder.
4
Pattern at "a" and "b" are broken.
(CARRY OUT 3D CHECKS BEFORE REPAIR)
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR)
D81
d
16
(J29)
VRS1
(VRS2)
b
3(1)
CARRY OUT 4R CHECKS.
a
(J24)
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.
RY1
Q
5(3)
(J23)
c
9(7)
(9)
R-2397
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.
This AC voltage is then half wave rectified by D61/D62
and smoothed (filtered) by C61/C62.
This AC voltage is the input to the IN3 and IN5 ports of
IC1, which determines if there is a magnetron / high
voltage problem.
(1) Control Unit
(2) Key Unit
The principal functions of these units and the signals communicated among them are explained below.
HIGH VOLTAGE TRANSFORMER
1. Control Unit
Signal of key touch and oven function control are all
processed by one microcomputer.
HIGH VOLTAGE CIRCUIT
MAIN BODY SIDE
1) Power Supply Circuit
This circuit changes output voltage at the secondary side
of the low voltage (T1) transformer to volatges required
at each part by full wave rectifying circuit, constant
voltage circuit, etc..
CT1 or CT2
T/C SIDE
RY3 or RY4
R61 or
R62
R65 or
R66
C61 or C62
D61 or
D62
2) ACL Circuit
This is an Auto-clear Circuit, i.e., a reset circuit, which
enables IC1 to be activated from initial state.
IC1
IN3 or
IN5 PORT
D63 or
D64
R63 or
R64
Vc
Figure T-1. High Voltage Monitoring Circuit
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.
14) Magnetron Temperature Circuit.
(Detect Noload or Fan Lock)
This is a circuit for transmitting output change of thermistor
(Magnetron Temperature Sensor) to IC1.
4) Clock Circuit
This is a circuit for controlling clock frequency required
for operating IC1.
15) Intake Air Temperature Detecting Circuit.
This is a circuit for transmitting output change of thermistor
(Intake Air Sensor) to IC1.
5) IC1 (Main Processor)
This is a one-chip microcomputer, responsible for controlling the entire control unit.
2. Key Unit
The key unit is composed of a matrix circuit in which when
a key it touched, one of signals P11, P12, P15, P16 and
P17 generated by the LSI, is passed through the key and
returned to the LSI as one of signals R0--R3. This model
has 20 Memory pads. When the oven is shipped, Memory
pad 1 to 10 are set as follows: fig.1.
6) IC2 (Memory Processor)
This is a memory IC, responsible for memory function.
7) Display Circuit
This is a circuit for driving display tubes by IC1 output.
8) Key Input Circuit
This is a circuit for transmitting key input information to
IC1.
Memory No.
1
2
3
4
5
6
7
8
9
10
9) Sound-body Driving Circuit
This is a circuit for driving sound body by IC1 output.
10) Relay Driving Circuit
This is a circuit for driving output relay by IC1 output.
11) Stop Switch Circuit
This is a circuit for driving IC1 to detect door opening/
closing.
12) Exhaust Air Temperature Detecting Circuit
This is a circuit for transmitting output change of thermistor
(Exhaust Air Temperature Sensor) to IC1.
Cook Time
5sec.
10sec.
20sec.
30sec.
40sec.
50sec.
1min.
1min.15sec.
1min.30sec.
2min.
Output Power
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
(fig. 1)
13) High Voltage Monitoring Circuit.
This circuit detects problems in the magnetron / high
voltage circuit by sensing a variation in the current
flowing through the primary winding of the high voltage
transformer.
During heating, the primary current of the high voltage
transformers also flows through the primary winding of
the current transformers CT1 and CT2. This causes a
current to be induced in the secondary windings of CT1/
CT2 and results in an AC voltage which is determined by
R61/R62.
This model has a double quantity pad. When the oven
is shipped, Magnification "1.8" is preset in the double
quantity pad. This model has an defrost pad. When the
oven is shipped, defrost is set as follows: fig.2.
POWER
OVEN ON/OFF
1 STAGE
10%
ON
(fig. 2)
17
R-2397
DESCRIPTION OF LSI
LSI(IZA646DR)
The I/O signal of the LSI(IZA646DR) is detailed in the following table.
Pin No.
Signal
I/O
Description
1
VREF
IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
2
IN7
IN
Temperature measurement input: MAGNETRON 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.
3
IN6
IN
Temperature measurement input: EXHAUST 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.
4
IN5
IN
A/D input for troubleshooting Magnetron 1.
5
IN4
IN
Terminal to change functions according to the model.
Signal in accordance with the model in operation is applied to set up its function.
6
IN3
IN
A/D input for troubleshooting Magnetron 2.
7
IN2
IN
Connected to GND.(0V)
8
IN1
IN
Terminal not used.
9
IN0
IN
Temperature measurement input: INTAKE THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this
input is converted into temperature by the A/D converter built into the LSI.
10
P47
OUT
Terminal not used.
11
P46
OUT
Memory (EEPROM) clock output.
12
13-14
P45
P44-P43
IN/OUT Memory (EEPROM) data input/output.
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power level operation, "L" level during cooking;
"H" 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
48sec.
44sec.
40sec.
36sec.
32sec.
26sec.
OFF
0sec.
4sec.
8sec.
12sec.
16sec.
22sec.
Power level
ON
OFF
40%
22sec. 26sec.
30%
16sec. 32sec.
20%
12sec. 36sec.
10%
8sec. 40sec.
0%
0sec. 48sec.
OFF
GND
ON
-5V
48 sec.
15
P42
OUT
Power supply output at thermistor detecting circuit.
(Output -5V in cooking only, but apply high impedance to others to prevent thermistor from
electrolytic corrosion ocurrence.)
16
P41
OUT
Terminal not used.
17
P40
OUT
Oven lamp, Blower motor and Stirrer motor driving signal. (Square Waveform :
During cooking
50Hz)
To turn on and off the shut-off relay (RY1). The
H
Square waveform voltage is delivered to the
L
RY1
relay
driving
circuit
and
20 msec
relays(RY3,RY4,COOK RELAY) control circuit.
18-22
P37-P33
OUT
Terminal not used.
23
P32
OUT
Signal to sound buzzer.
This signal is to control the 2.5kHz continuous
signal.
A: key touch sound.
B: Guydance sound.
C: Completion sound.
0.12 sec
GND
A
-5V
1.2 sec
B
C
T
200µsec.
24
P31
IN
2.4 sec
1.2 sec
200µsec.
Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
H : GND
L (-5V)
20 msec
25
P30
OUT
26
CNVSS
IN
Terminal not used.
Connected to Vc.(-5V)
18
R-2397
Pin No.
Signal
I/O
27
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set
to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter set at
"H" level.
Description
28
XIN
IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
29
30/31
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
XCIN/XCOUTIN/OUT Terminal not used.
32
VSS
IN
33
ø
OUT
34
R3
IN
Signal coming from touch key.
When either one of G-12 line keys on key matrix is touched, a corresponding signal out
of P11, P12, P14-P17 will be input into R3. When no key is touched, the signal is held at
"L" level.
35
R2
IN
Signal similar to R3.
When either one of G-11 line keys on key matrix is touched, a corresponding signal will
be input into R2.
36
R1
IN
Signal similar to R3.
When either one of G-10 line keys on key matrix is touched, a corresponding signal will
be input into R1.
37
R0
IN
Signal similar to R3.
When either one of G-9 line keys on key matrix is touched, a corresponding signal will
be input into R0.
38
VP
IN
Anode (segment) of Fluorescent Display light-up voltage: -31V
Vp voltage of power source circuit input.
39
P17
OUT
Power source voltage: -5V.
VC voltage of power source circuit input.
Terminal not used.
Segment data signal.
The relation between signals and indicators are as follows:
Signal
Segment
Signal
Segment
P24 .................. i
P23 ................ j,k
P17 ............... LB
P16 .............. UB
P15 ................. h
P14 ................. g
P13 ..................... f
P12 .................... e
P11 .................... d
P10 .................... c
P07 .................... b
P06 .................... a
ß(50Hz)
GND
-31(V)
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0-R3 terminal while one
of G-6 line keys on key matrix is touched.
40
P16
OUT
Segment data signal. Signal similar to P17.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0-R3 terminal while one
of G-5 line keys on key matrix is touched.
41
P15
OUT
Segment data signal.
Signal similar to P17.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0-R3 terminal while one
of G-4 line keys on key matrix is touched.
42-43
P14-P13
OUT
Segment data signal.
Signal similar to P17.
44
P12
OUT
Segment data signal.
Signal similar to P17.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0-R3 terminal while one
of G-8 line keys on key matrix is touched.
45
P11
OUT
Segment data signal.
Signal similar to P17.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0-R3 terminal while one
of G-7 line keys on key matrix is touched.
19
R-2397
Pin No.
46
Signal
P10
I/O
OUT
Description
47-48
P07-P06
OUT
Segment data signal.
Signal similar to P17.
49
P05
OUT
Digit selection signal.
The relation between digit signal and digit are as
follows:
Segment data signal.
Signal similar to P17.
Digit signal
P05
P04
P03
P02
P01
P00
H
ß(50Hz)
L
GND
Digit
1st.
2nd.
3rd.
4th.
5th.
6th.
P05
-31(V)
P04
P03
P02
P01
Normally, one pulse is output in every ß period,
GND
and input to the grid of the Fluorescent Display.
-31(V)
P00
50-54
P04-P00
OUT
Digit selection signal.
Signal similar to P16.
55-57
P27-P25
OUT
Terminal not used.
58-59
P24-P23
OUT
Segment data signal.
Signal similar to P17.
60
P22
OUT
(Sound) Voltage level control terminal.
This terminal (P22) is to control volume level of buzzer sound with terminals P21. Since
the volume level of buzzer sound depends on voltage energized, it is control level in 3
steps by combining signal levels for P22,P21. Relationship of signal level combination to
sound volume level is shown in the following table, 1~3 in the table, however, are indicated
in the descending order from the maximum level of sound volume through the minimum
level.
Sound Volume
1,(Max.)
2,
3,(Min.)
P21
L
H
L
P22
L
L
H
A : 1,(Max) 20V
2,
13V
3,(Min) 7V
A
*At Output terminal P32, rectangular wave signal of 2.5kHz is output.
61
P21
OUT
62
P20
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal(0V).
Door opened; "L" level signal(-31.0V).
63/64
AVCC/VCC
IN
Connected to GND.
Sound level control signal.
Refer to above signal P22.
2-2 Memory IC (IC2)
AT24C04 is a 4K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with 512
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
(5) SDA
H.V. GENERATION
TIMING
& CONTROL
START CYCLE
START
STOP
LOGIC
TOP VIEW
CONTROL
LOGIC
A0
1
8
VCC
A1
2
7
TEST
(6) SCL
SLAVE ADDRESS
REGISTER
COMPARATOR
3
6
WORD
ADDRESS
COUNTER
1
5
3
SCL
CK
PIN
VSS
4
5
SDA
Dout
ACK
Figure T-4 Relation between Pin Nos, and Signals
20
E 2PROM
512 x 8
INC
LOAD
R/W
A2
64
XDEC
64
YDEC
8
DATA REGISTER
Dout
R-2397
Pin No.
1-3
4
5
6
7
8
Signal
A0-A2
VSS
SDA
SCL
TEST
VCC
I/O
IN
IN
IN/OUT
IN
IN
IN
Description
Connected to GND.
Connected to VC(-5V).
Serial data input/output : input/outputs data to IC1.
Clock signal input : input/outputs sireal data at every one pulse.
Connected to VC(-5V).
Connected to GND.
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.
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 sensorrelated controls of the touch control panel by using the
dummy resistor(s).
approx. 1M ohm
2. Shapes of Electronic Components
Transistor
2SA1561
2SB1238
Transistor
2SB953
B
E C
T
i t
E
C
B
E
Transistor
DTA114YS
DTB143ES
DTD143ES
KRA101M
B
C
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
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, when checking the performance of the touch
control panel, put the outer cabinet on the oven to avoid
touching the high voltage transformer, or unplug the
primary terminal (connector) of the high voltage transformer to turn it off; the end of such connector must be
insulated with an insulating tape. After servicing, be
sure to replace the leads to their original locations.
A. On some models, the power supply cord between the
touch control panel and the oven itself is so short that the
two can’t be separated. For those models, check and
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.
21
R-2397
PROCEDURE FOR CHECKING/CLEARING
SERVICE COUNTS OF MICROWAVE OVEN
PROCEDURE FOR ENTERING TO IC-2
When the control unit or IC-2 is exchanged, re-enter the
constants of DEFROST and the memory pads 1~20, referring to items 1 and 2 below.
The following procedure enables the servicer to obtain the
total service counts (cook cycles) for memory cooking,
double quantity cooking and defrost. The maximum capacity
of the counter is 999,999 counts, above which the counter
will reset to "0". The counter will retain the total counts (will
not clear) in the event of a power disruption.
1) How to enter the contents of DEFROST
T = STG1 + STG2 + STG3
STG = A x T + B
1 stage 10% power level
"
" : Flicker / : 0.1 sec BUZZER
1) Practice for checking total service counts
(eg; 234,567 Counts).
•••
PAD
DISPLAY
flashing
•••
PAD ORDER
(Door close)
SET
SET
(within 2 sec.)
#1 START
DEFROST
9,9
0.1sec BUZZER
INDICATOR LED PHONE
•
(Door close)
•
CHECK
NUMBER
•
CHECK
CHECK
#1
82 68
CHECK
( user total count )
#2
VOLUME
SELECTATIME
VOLUME
2 34 56 7
DOUBLE
QUANTITY
1
9
( service total count )
NUMBER
1
SELECTAPOWER
( after 1 sec. )
45
( filter used time )
2
NUMBER
1
SELECTATIME
2
0
( after 1 sec. )
2 00
SELECTATIME
( filter lim. time )
0 (No 10)
NUMBER
0
10
( after 1 sec. )
SELECTATIME
35 43 2
START
SET
SET
( service total cook time )
CHECK
•
#1: Denotes total service counts within the reach of user, of
which checking and clearing practices are described in
this instruction manual.
#2: Denotes the procedure for the servicer to disable checking/clearing. This procedure is instructed to service personnel only and is excluded from the operation manual.
"
#1 VOLUME
VOLUME
DOUBLE
QUANTITY
SET
0
SET
CHECK
" : Flicker /
x2
"POWER"
100%
"POWER"
10%
2) How to enter the memory information
Example : Suppose cooking time 5 sec. and output power
100% are entered into the memory pad 1.
: 0.1 sec BUZZER
DISPLAY
.
"NUMBER"
.
CHECK
82 68
"CHECK"
(User's Total Counts)
82 68
"CHECK"
82 68
"CHECK"
2 34 56 7
"CHECK"
(Total Counts of Service)
0
"CHECK"
0
"CHECK"
0
"CHECK"
.
"NUMBER"
.
1
0.00 DEF
1
0.99 DEF
(A)
1
0 DEF
1
90 DEF
#2
(+ - B)
DEF
1
90
DEF
90
2
0.00 DEF
2
0.00 DEF
(A)
2
0 DEF
2
0 DEF
(+ - B)
3
0 DEF
3
A DEF
4
. DEF
.
PHONE
#1 : No key entry signal.
#2 : To set-B, touch the selectapower key twice.
2) Practice for clearing Service's counts
PAD ORDER
(Door close)
CHECK
CHECK
DISPLAY
.
.
"NUMBER"
.
PAD ORDER
(Door close)
SET
SET
(within 2 sec.)
1
5
SET
SET
PHONE
DISPLAY
.
.
"NUMBER"
.
NUMBER 1
NUMBER 1
"NUMBER"
PHONE
.0
.5
.
.
Enter the memory information into the memory pads 1 ~10
referring to above example. The memory information are
given below.
#1: Denotes the procedure for the servicer to disable clearing. This procedure is instructed to service personnel only
and is excluded from the operation manual.
22
R-2397
Memory No.
1
2
3
4
5
6
7
8
9
10
11-20
Cook Time
5 sec.
10 sec.
20 sec.
30 sec.
40 sec.
50 sec.
1 min.
1 min. 15 sec.
1 min. 30 sec.
2 min.
0 sec.
Output Power
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
Enter the memory information of magnification of double into
the memory pads 1 ~ 20 (all 1.80).
Ex, To set memory 1
PAD ORDER
SET
SET
DOUBLE
1
1,8,0
SET
SET
"NUMBER"
"NUMBER"
NUMBER 1
NUMBER 1
"NUMBER"
DISPLAY
.
.
.
0.00
1.80
.
.
PHONE
DOUBLE
DOUBLE
DOUBLE
DOUBLE
x3
OTHER CHECKING AND CLEARING PROCEDURE
1) To check the contents of defrost.
"
" : Flicker / : 0.1 sec BUZZER
PAD ORDER
(Door close)
CHECK
DEFROST
DISPLAY
.
"NUMBER"
.
1
0.99 DEF
(A)
DEF
1
90
(+ - B)
2
0.00 DEF
(A)
DEF
2
0
(+ - B)
DEF
3
A
PHONE
CHECK
CHECK
CHECK
POWER
CHECK
CHECK
POWER
100%
CHECK
POWER
100%
(Repeat)
.
CHECK
#1 : No key entry signal.
2) How to clear all counter(user and service) and total
cooking time and used time of filter.
PAD ORDER
(Door close)
SET
SET
DOUBLE
CHECK
VOLUME
SET
"NUMBER"
"NUMBER"
"NUMBER"
"NUMBER"
DISPLAY
.
.
.
.
.
.
.
PHONE
DOUBLE
DOUBLE
DOUBLE
23
R-2397
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below
before operating the oven.
1. CARRY OUT 3D CHECKS.
2. Make sure that a definite” click” can be heard when the
microwave oven door is unlatched. (Hold the door in
a closed position, then pull the door release lever with
one hand, this causes the latch leads to rise, it is then
possible to hear a “click’ as the door switches operate.)
3. Visually check the door and cavity face plate for
damage (dents, cracks, signs of arcing etc.).
1.
2.
3.
4.
5.
6.
Door does not close firmly.
Door hinge, support or latch hook is damaged.
The door gasket or seal or damaged.
The door is bent or warped.
There are defective parts in the door interlock system.
There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
Please refer to ‘OVEN PARTS, CABINET PARTS, DOOR PARTS’, when carrying out any of the following removal
procedures:
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 two (2) screws from the lower portion of the
rear cabinet and lower left portion of the oven cabinet
back side using by special screw drive (Type; LHSTIX
DLR4-100T).
4. Remove the screws from rear and along the side edge
of case.
5. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
6. Lift the entire case from the oven.
7. Remove the screws holding the rear cabinet to the oven.
8. Remove the rear cabinet.
9. Discharge the HV capacitor before carrying out any
further work.
10.Do not operate the oven with the outer case removed.
N.B.; Step 1,2 and 9 form the basis of the 3D checks.
CAUTION:DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
Special screw
Screw Driver
(Type; LHSTIX DLR4-100T)
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. Remove two (2) screws holding earth side terminals of
high voltage rectifier assemblies.
3. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
4. Remove two (2) screws holding capacitor holder to the
right side of oven cavity and remove the capacitor
holder.
5. Now, high voltage rectifier assembly should be free.
CAUTION
1. DO NOT REPLACE ONLY HIGH VOLTAGE RECTIFIER. WHEN REPLACE IT, REPLACE HIGH
VOLTAGE RECTIFIER ASSEMBLY.
2. WHEN REPLACING HIGH VOLTAGE RECTIFIER
ASSEMBLY, ENSURE THAT THE CATHODE
(EARTH) CONNECTION IS SECURELY FIXED
TO THE CHASSIS WITH A EARTHING SCREW.
6. Now, the two (2) high voltage capacitors are free.
24
R-2397
MAGNETRON REMOVAL
1. Remove the outer case cabinet referring to "OUTER
CASE REMOVAL" and CARRY OUT 3D CHECKS.
2. Remove the eleven (11) screws holding the rear
cabinet to the oven cavity.
3. Disconnect the power supply cord from the noise filter.
4. Remove the one (1) screw holding the earth wire of the
power supply cord to the noise filter angle.
5. Remove the rear cabinet with the power supply cord
from the oven cavity.
6. Remove the two (2) screws holding the magnetron
exhaust duct to upper and lower waveguide.
7. Disconnect all the wire leads from the two (2)
magnetrons.
8. Carefully remove each four (4) screws holding each
two (2) magnetrons to waveguide. When removing
the screws hold the magnetron to prevent it from
falling.
9. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal
object around the antenna.
10.Now, the magnetron is free.
CAUTION: WHEN REPLACE THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS TIGHTENED SECURELY.
HIGH VOLTAGE TRANSFORMER REMOVAL
1. Remove the outer case cabinet referring to "OUTER
CASE REMOVAL" and CARRY OUT 3D CHECKS.
2. Disconnect the all wire leads from the magnetron(s).
3. Remove the wire holder holding the high voltage
wires.
4. Disconnect all wire leads from the high voltage
transformer(s).
5. Remove the each two (2) screws holding each high
voltage transformer.
6. Now, high voltage transformer(s) is (are) free.
BLOWER MOTOR REMOVAL
4. Remove the one (1) screw holding the blower motor to
the chassis support.
5. Remove the blower motor. Now, the blower motor is
free.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the blower motor and
the blower motor thermal cut-out.
3. Remove the one (1) screw holding the blower motor to
the oven cavity.
STIRRER MOTOR (UPPER) REMOVAL
3. Remove the one (1) screw holding the stirrer motor
(upper) to the oven cavity.
4. Turn and lift up the stirrer motor (upper).
5. Now, the stirrer motor (upper) is free.
1. Remove the outer case cabinet referring to "OUTER
CASE REMOVAL" and CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the stirrer motor (upper).
STIRRER MOTOR (LOWER) REMOVAL
1. Disconnect oven from the power supply.
2. Remove the stirrer motor cover by snipping off the
material in four portions.
3. Where the portions have been snipped off bend the
portions flat. No sharp edge must be evident after
removal of the stirrer cover.
4. Disconnect wire leads from the stirrer motor. (See
"Positive lock connector removal")
5. Remove one (1) screw holding the stirrer motor to
oven cavity.
6. Now, the stirrer motor (lower) is free.
7. After replacement use the one (1) screw to fit the stirrer
motor cover. (This screw has been fitted to the base
plate near the stirrer motor cover beforehand.)
OVEN LAMP SOCKET REMOVAL
Oven lamp
socket
Terminal
1. CARRY OUT 3D CHECKS.
2. Remove the oven lamp.
3. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket with
the flat type small screw driver.
4. Lift up the oven lamp socket.
5. Now, the oven lamp socket is free.
Wire lead
Flat type small
screw driver
Terminal hole
Figure C-1. Oven lamp socket
25
R-2397
CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
Replacement of individual component is as follows:
The complete control panel should be removed for replacement of components. To remove the control panel,
proceed as follows:
1. CARRY OUT 3D CHECKS.
2. Remove the air intake filter assembly from the base
plate.
3. Remove two (2) screws holding the control panel to
the base plate.
4. Pull down the control panel and remove it forward.
5. Disconnect two connectors (A), (B), (D), (H) and TAB
terminal (TAB1,2,3,4) from the control unit.
6. Now the control panel assembly is free.
CONTROL UNIT AND CONTROL PANEL FRAME
(WITH KEY)
7. Remove two (2) screws holding the control panel
mounting angle to the panel frame.
8. Lift up the control panel mounting angle from the panel
frame.
9. Disconnect connector (G) from the control unit by
pushing the hooks of cable holder inwardly.
10.Remove four (4) screws holding the control unit to the
panel frame assembly.
11.Push down the right side two (2) hooks fixing the
control unit to the panel frame assembly, and lift up the
control unit upward.
12.Now, the control unit and control panel frame (with
key) are free.
CAUTION FOR TOUCH CONTROL PANEL REMOVAL
1) Hold the lower end (Position A, Fig. 1) of the touch
control panel assembly firmly while sliding it down and
toward you.
CAUTION:
At installing control panel unit assembly to main
body set:
1. Ensure the installation of wiring-related parts without negligence.
2. When inserting key cable to main body set, ensure
them free from caught-in trouble. In addition, when
installing the control panel assembly to base plate
with screws, be sure of pushing the control panel
unit upward to fix with screws firmly.
3. Do not allow any wire leads to come near the
varistor works, because it will explode and the
wire leads near by the varistor will be damaged.
DO NOT FORCE THE CONTROL UNIT TO SLIDE
DOWN DURING REMOVAL. THIS MAY CAUSE DAMAGE TO THE CONTROL UNIT BY HITTING A RELAY
(RY-4) OR THE TAB TERMINALS LOCATED AT THE
FRONT OF THE OVEN CAVITY.
2) If the Touch Control Panel is hard to remove;
(1) Insert a flat head screw driver into space B . (Fig. 1)
(2) Rotate the screwdriver clockwise while holding position C of the Touch Control Panel. (Fig. 2)
TO AVOID DAMAGE TO TOUCH CONTROL PANEL,
COVER THE TIP OF SCREWDRIVER WITH TAPE.
(3) Re-solder the Relay (RY-4) prior to reinstalling the
Touch Control Panel.
NOTE: 1. Before attaching a new key unit, remove
remaining adhesive on the control panel frame
surfaces completely with 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.
Fig. 2
Fig. 1
B
B
A
C
TOUCH CONTROL PANEL
SCREW DRIVER
HOW TO RELEASE THE POSITIVE LOCK® CONNECTOR.
Procedure
1. Pushing the lever of positive lock® connector.
2. Pull down the connector from the terminal.
3. Now, the connector is free.
Terminal
Positive lock®
connector
1
Note: If the positive lock® has a insulation sleeve, first
remove it. If you do not so, you can not push the
lever of positive lock®.
Push
Lever
CAUTION: The positive lock® terminal can not be disconnected by only pulling. Because once
you (Service personnel) have connected the
positive lock® connector to the terminal, the
positive lock® connector has been locked.
2
Pull down
Figure C-2. How to release the positive lock connector.
26
R-2397
POWER SUPPLY CORD REPLACEMENT
1.
2.
3.
4.
5.
CARRY OUT 3D CHECKS
Release the cord bushing from the rear cabinet.
Disconnect the brown and blue wires of the power
supply cord from the noise filter.
Loosen the single (1) screw holding the earth angle
and earth wire of power supply cord.
Remove the power supply cord.
4.
5.
6.
Re-install the cord bushing to the rear cabinet.
Re-install the rear cabinet to oven cavity and the
bottom plate with the eleven (11) screws and two (2)
washers.
CARRY OUT 4R CHECKS.
K
BL
CAUTION: DO NOT ALLOW THE WIRE LEADS OF
THE POWER SUPPLY CORD TO COME
NEAR THE HIGH VOLTAGE TRANSFORMER. BECAUSE THE HIGH VOLTAGE TRANSFORMER BECOMES HOT.
Noise filter unit
HT
W
N
L
Re-install
1. Insert the power supply cord into the cord bushing.
2. Connect the brown and blue wires of power supply
cord into the terminals of noise filter, referring to
pictorial diagram.
3. Insert the green/yellow wire of power supply cord
into the earth angle, and tight the screw holding the
earth angle.
Blue wire
Brown wire Power
supply
cord
Screw
Rear
cabinet
Green/Yellow
wire
Cord
bushing
Figure C-3. Power supply cord replacement
1ST LATCH, 2ND LATCH, 3RD LATCH, MONITOR, AND STOP SWITCHES REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel from the oven cavity referring to “CONTROL PANEL REMOVAL”.
3. Remove the two (2) screws holding the latch hook to
the oven cavity.
4. Open the door and pull the latch hook out of the oven
cavity.
5. For 1st latch, 2nd latch or Monitor switch removal
5-1. Disconnect the wire leads from the switch.
5-2. Push the retaining tabs outward slightly and then
pull the switch forwards and remove it from the
latch hook.
6. For 1st latch and stop switches removal
6-1. Disconnect the wire leads from the 1st latch and
stop switches.
6-2. Remove the single (1) screw and nut holding the
1st latch and stop switches to the latch hook.
CAUTION: WHEN THE 1ST LATCH SWITCH AND
2ND. LATCH SWITCH ARE INSTALLED,
THE TWO (2) TABS OF THE LATCH
HOOK SHOULD BE BROKEN.
1ST, 2ND, 3RD LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
In case 1st latch switch, 2nd latch, stop switch, 3rd latch
switch and monitor switch do not operate properly due to a
mis-adjustment, the following adjustment should be made.
1. Loosen the two (2) screws holding the latch hook.
2. 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
0.5mm. The vertical position of the latch hook should be
placed where the stop switch and 1st, 2nd, 3rd latch
switches have activated with the door closed.
The horizontal position of the latch hook should be
placed where the monitor switch has activated with the
door closed.
3. Secure the screws with washers firmly.
4. Make sure of the 1st, 2nd, 3rd latch switches, stop
switch, and monitor switch operation. If those switches
have not activated with the door closed, loose two (2)
screws holding latch hook and adjust the latch hook
position.
circuit when the door is opened.
2. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
Door release
lever
Latch head
Monitor switch
Latch hook
2nd. latch switch
Joint lever
Latch lever
After adjustment, make sure of the following:
1. The stop switch and 1st, 2nd, 3rd latch switches interrupt
the circuit before the door open when the door release
lever is pulled, and then and monitor switch close the
1st. latch switch
Stop switch
Latch head
3rd. latch switch
meter. (Refer to Microwave Measurement Procedure.)
Figure C-4 Latch Switch Adjustments
27
R-2397
DOOR REPLACEMENT AND ADJUSTMENT
DOOR REPLACEMENT
1. CARRY OUT 3D CHECKS.
2. Remove four (4) screws holding the upper and lower
oven hinge to the oven cavity.
3. Remove door assembly with upper and lower oven
hinges by pulling it forward.
4. On re-installing new door assembly, secure the upper
and lower oven hinges with the four (4) mounting
screws to the oven cavity. Make sure the door is
parallel with bottom line of the oven face plate and the
latch head pass through the latch holes correctly.
5. CARRY OUT 4R CHECKS.
Note: After any service to the door, the approved
microwave survey meter should be used to assure
in compliance with proper microwave radiation
standards. (Refer to Microwave Measurement
Procedure.)
FLATE TYPE
SCREW DRIVER
PROTECTION
BY TAPE
LOWER
OVEN HING
UPPER
OVEN HING
DOOR ADJUSTMENT
When removing and/or loosening hinges such as in door
replacement, the following adjustment criteria are taken.
Door is adjusted to meet the following three conditions by
keeping screws of hinge loose.
1. Adjust door latch heads at a position where they
smoothly catch the latch hook through the latch holes.
Refer to latch switch adjustments.
2. Deviation of the door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. The door is positioned with its face depressed toward
the cavity face plate.
4. Reinstall outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
UPPER
OVEN
HINGE
DOOR
PANEL
CHOKE
COVER
Figure C-6. Choke Cover Removal
DOOR COMPONENTS REMOVAL
Remove the door assembly, referring to from item 1
through item 3 of “DOOR REPLACEMENT”.
1. Place the door assembly on a soft cloth with facing up.
(UPPER AND LOWER OVEN HINGE REMOVAL)
2. Remove the choke cover, referring to “CHOKE COVER
REMOVAL”.
3. Release the oven hinges from the door panel.
4. Now, the oven hinges are free.
(DOOR HANDLE REMOVAL)
5. Remove the two (2) screws holding the door handle to
door.
6. Remove the door handle from the door panel.
(UPPER AND LOWER LATCH HEADS REMOVAL)
7. Remove the door release lever from the door assembly.
8. Remove the three (3) screws holding the joint plate to
the door panel.
9. Release the latch spring from the tab of the joint lever
and joint plate.
10.Release the latch heads from joint lever and joint plate.
11.Now, the latch heads are free.
OUTER CASE
CABINET
DOOR
ASSEMBLY
LOWER
OVEN
HINGE
(DOOR FRAME REMOVAL)
12.Set the four (4) tabs of the door frame upright.
13.Remove the door frame from the door panel. Now,
door frame is free.
LATCH HEADS
Figure C-5. Door Assembly Replacement and Adjustment
CHOKE COVER REMOVAL
(DOOR GLASS REMOVAL)
14.Remove the four (4) screws holding the two (2) outside
window fixing plates to the door panel.
15.Now, the door glass is free.
1. Insert an iron plate (thickness of about 0.5mm or flat
type screw driver to the gap between the choke cover
and door panel as shown figure to free the engaging
part. The protect sheet may be used not to damage
the door panel.
2. Lift up the choke cover, now cove is free.
28
R-2397
SERVICE INFORMATION
IMPORTANT: When replace the magnetron MG1 and/or MG2, the relays RY3 and RY4 on control unit must be
replaced at the same time. Because if the magnetron's life has been over, the relay's life may also
be over.
MICROWAVE MEASUREMENT
After adjustment of door latch switches, monitor switch
and door are completed individually or collectively, the
following leakage test must be performed with a survey
instrument and it must be confirmed that the result meets
the requirements of the performance standard for microwave oven.
2.
3.
REQUIREMENT
The safety switch must prevent microwave radiation
emission in excess of 5mW/cm2 at any point 5cm or more
from external surface of the oven.
PREPARATION FOR TESTING:
Before beginning the actual test for leakage, proceed as
follows;
1. Make sure that the test instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement
for instrumentations as prescribed by the performance standard for microwave ovens must be used for
testing.
4.
5.
6.
Recommended instruments are:
NARDA 8100
NARDA 8200
HOLADAY HI 1500
SIMPSON 380M
Place the oven tray into the oven cavity.
Place the load of 275 ± 15ml of water initially at 20
± 5˚C in the centre of the oven tray. The water
container should be a low form of 600 ml beaker
with inside diameter of approx. 8.5cm and made of
an electrically non-conductive material such as glass
or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that
any leakage is measured accurately.
Close the door and turn the oven ON with the timer set
for several minutes. If the water begins to boil before
the survey is completed, replace it with 275ml of cool
water.
Move the probe slowly (not faster that 2.5cm/sec.)
along the gap.
The microwave radiation emission should be measured at any point of 5cm or more from the external
surface of the oven.
SHARP
mW cm 2
mW cm 2
Microwave leakage measurement at 5 cm distance
29
R-2397
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2.
APPEARS ON DISPLAY
ASYMMETRIC
RECTIFIER
MG1: MAGNETRON (UPPER)
MG2: MAGNETRON (LOWER)
T2 : HIGH VOLTAGE
TRANSFORMER
(REAR)
B3
C2: H.V. CAPACITOR
EXHAUST
THERMISTER
B2
STOP SWITCH B1
BM
BLOWER MOTOR
INTAKE
THERMISTER
H1 H3
D3 D1
RY4
RY3
RY1
A1
SM
SM
STIRRER MOTOR
OL
OVEN LAMP
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
MAGNETRON
THERMISTER
TAB2
TAB4
TAB3
TAB1
A3
A7
A5
CONTROL
UNIT
ASYMMETRIC
RECTIFIER
H. V. RECTIFIER
C1: H.V. CAPACITOR
TC1 :MAGNETRON
THERMAL
CUT OUT
145C°(UPPER)
TC4 : OVEN THERMAL
CUT OUT 115C°
TC3 : BLOWER MOTOR
THERMAL CUT OUT
115C°
MONITOR
SWITCH
MONITOR
RESISTOR
F1: WEAK POINT A017
NOISE FILTER
230V~50Hz
F2:
FUSE
F6.3A
F3:
WEAK POINT
A018
H. V. RECTIFIER
TC2: MAGNETRON
THERMAL CUT OUT
145C°(LOWER)
F4: WEAK POINT A018
2ND LATCH SWITCH
T1 :
HIGH VOLTAGE
TRANSFORMER
(FRONT)
NOTE: " " INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V.
C1 and C2: 1.07µF/ AC 2100V
3RD LATCH SWITCH
Figure O-1. Oven SChematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TIME KEY TIUCHED.
3. COOKING TIME PROGRAMMED.
ASYMMETRIC
RECTIFIER
3RD LATCH SWITCH
Figure O-2. Oven SChematic-ON Condition
30
MG1: MAGNETRON (UPPER)
H. V. RECTIFIER
C2: H.V. CAPACITOR
MG2: MAGNETRON (LOWER)
T2 : HIGH VOLTAGE
TRANSFORMER
(REAR)
ASYMMETRIC
RECTIFIER
EXHAUST
THERMISTER
B3
B2
STOP SWITCH B1
BM
BLOWER MOTOR
MAGNETRON
THERMISTER
H3
H1
D3 D1
RY4
RY3
RY1
SM
SM
A1
A7
INTAKE
THERMISTER
TAB4
A3
CONTROL
UNIT
STIRRER MOTOR
OL
OVEN LAMP
TAB3
TAB1
TC4 : OVEN THERMAL
CUT OUT 115C°
A5
TC3 : BLOWER MOTOR
THERMAL CUT OUT
115C°
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
C1: H.V. CAPACITOR
TC1 : MAGNETRON
THERMAL
CUT OUT
145C°(UPPER)
TAB2
F2:
FUSE
F6.3A
MONITOR
RESISTOR
MONITOR
SWITCH
NOISE FILTER
F1: WEAK POINT A017
230V~50Hz
F3:
WEAK POINT
A018
H. V. RECTIFIER
TC2: MAGNETRON
THERMAL CUT OUT
145C°(LOWER)
F4: WEAK POINT A018
2ND LATCH SWITCH
T1 :
HIGH VOLTAGE
TRANSFORMER
(FRONT)
4. START KEY TOUCHED
H
1
2
3
31
RY-1
RY-4
T1
4
INTAKE THERMISTOR
TAB3
BRN
TAB4
ORG
CN-A
1 ORG
2
3 PNK
4
5 WHT
6
7 BLK
TAB2
BRN
TAB1
ORG
BLU
GRN
GRN
NO
B
L
U
E
5
G
R
Y
G W
R H
Y T
MG2
RED
GRY
WHT
ORG
MAGNETRON
(Lower)
FERRITE
BLK
BLK
MAGNETRON
THERMISTOR
BRN
TC1:
MAGNETRON
THERMAL
CUT- OUT
(Upper)
FERRITE
MG1
MAGNETRON
(Upper)
TC2:
MAGNETRON
THERMAL CUT- OUT
(Lower)
ORG
STIRRER MOTOR
O
R
G
Figure S-1. Pictorial Diagram
B
R
N
T2
T1
ASYMMETRIC
RECTIFIER
HIGH VOLTAGE
TRANSFORMER
C2
HIGH VOLTAGE
CAPACITOR
HIGH VOLTAGE
TRANSFORMER
ASYMMETRIC
RECTIFIER
C1
HIGH VOLTAGE
CAPACITOR
BRN
STIRRER MOTOR
PNK
YLW
WHT
WHT
BLK
BRN
BRN
GRY
BLU
BRN
N
L
WHT
GRY
GRY
ORG
F4:
WEAK
POINT
A018
F1: WEAK POINT A017
BLK
NOISE FILTER
B
WHT
WHT
WHT
GRN
RED
BLK
ORG
BRN
ORG
G
R
Y
HIGH VOLTAGE COMPONENTS
BLK
ORG
G
/
Y
BLOWER
MOTOR
TC3:
BLOWER
MOTOR
TAERMAL
CUT- OUT
MONITOR
RESISTOR
F3:
WEAK
POINT
A018
FERRITE
CLAMP R
PNK
PNK
PNK
O
R
G
O
R
G
ORG
ORG
F2:
FUSE
F6.3A
PNK
PNK
POWER
SUPPLY
CORD
4
3RD LATCH
SWITCH
COM.
COM.
NO
STOP
SWITCH
COM.
NO
2ND LATCH
SWITCH
(Oven side)
WHT
PNK
3
TAB4 TAB3
T3
CN-A
TAB1
CNIH
CN-B
1 GRN
2 RED
3 GRY
CN-H
1 BLK
2
3 BLK
1ST LATCH
SWITCH
(Cabinet side)
WHT
NO
GRY
COM.
WHT
YLW
RED
2
CT-1
TAB2
RY-3
CN-B
IC
CN-D
TOUCH CONTROL PANEL
CN-D
1 BLK
2
3 BLK
GRY
EXHAUST THERMISTOR
D
COM.
TC4:
OVEN
THERMAL
CUT- OUT
C
MONITOR
SWITCH
NC
OVEN LAMP
& SOCKET
A
H. V. RECTIFIER
1
H. V. RECTIFIER
WHT
R-2397
5
6
A
B
C
F
G
6
D
E
F
G
H
3
A
CT2
CT1
c
a
: IF NOT SPECIFIED, 0.01µF / 16V
: IF NOT SPECIFIED, ISS270A
1K
D62 R64
1K
D61 R63
d
P
S2
D3
D2
2
C71
30K
Q1
470
R80
2SB953
R71 VP
DOOR SWITCH
B
B
1
Q84
DTB143ES
Q83
DTB143ES
Q81
DTD143ES
D70
11ES1
R84
1/2W
39
R83
1/2W
39
D4
D1
D1~D4:11ES1
D7
11ES1
B
EXHAUST
THERMISTOR
3
VC
6.8K
3
D
0.01uF, 16V
C200
1
47K
INTAKE THERMISTOR
D
Q2
2SA1561T
CF1 CST4.00MGW
R79
VP
0.01uF, 25V
VP
3
35
30
H
40
45
50
55
60
64
25
20
15
10
5
1
VCC
TEST
SCL
SDA
Vcc
AVcc
P20
P21
P22
P23
P24
P25
P26
P27
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
VP
R0
R1
R2
R3
Ø
R6
R31
15K
VP
R43 10K
DOOR
R42 39K
20K
R41
Q41
2SB1238
15 1/2W
(J3)36K
Q40
KRA101M
MAGNETRON THERMISTOR
1
H
C72
VREF
IN7
IN6
IN5
IN4
IN3
IN2
IN1
IN0
P47
P46
P45
P44
P43
P42
P41
P40
P37
P36
P35
P34
P33
P32
P31
P30
CNVSS
RESET
Xin
Xout
Xcin
Xcout
Vss
(J2)8.2K
A0
A1
A2
VSS
VC
3.3K
R40
SP1
F2
F1
R101
R100
R99
R98
9
12
G 11
G
i
G
2 2 P
G 10
G
ON
j
F F N
k
1
k j i
NUMBER
j
a
h
j
6G
8
3
a
G
2
1
e
f
d
g
G
5
6
3
4
5
G
7
0
9
8
%
4
G
3
B B C P 1 1
6
X 2
d
POWER
a
f g b
e
c
1G
U L N N F F
h
FILTER
c
b
CHECK
a
2G
a b c d e f g h
DOUBLE
DEF
a
3G
7
G
G G G G G G
6 5 4 3 2 1
2
a
4G
FLUORESCENT DISPLAY TUBE
5G
G
2
G
1
5
6
Figure S-2. Control Panel Circuit
R201
47K
47K
R68
R67
C80
_
+
0.1µF, 50V
Q20
KRA101M
Q80
DTA114YS
VA
C4
0.01µF, 25V
560, 1/2W
R3
R33 10K
S1
C8
CONTROL UNIT
C30
PA080DR
15G471K
(J24) b
VRS1
: IF NOT SPECIFIED, 1/4W ± 5%
TAB4
MICRO 2
TAB3
TAB2
MICRO 1
TAB1
OVEN LAMP
BLOWER MOTOR
STIRRER
A 1
MOTOR
5
A
R61
R62
AC230V
50HZ
1.5KF
1.5KF
RY1
RY3
RY4
D81
D83
R65
R66
7
C70
0.01µF, 50V
D84
C61
300K
300K
C1
D71
_
+
22µF
25V
C62
_
+
22µF
25V
0.1µF, 50V
C21
R70
DOOR
C82
+ _
1µF, 50V
C81
C2
_
+
1000µF, 35V
R1
0.01µF
50V
ZD1
R73
A
D63
+ _
2.2µF, 50V
100
_ +
100µF
16V
3.3K
1.8K
20K
R74
R72
T1
D64
R20
15K
C20
1K
HZ4C3
C9
_
+
22µF
25V
R5
C74
0.1µF
50V
ZD2 C6 R4
C22
R32 2.7K
C5
_
+
47µF, 10V
R200
8
5
HZ12C1
C3
_
+
3.3µF, 50V
1.1K
5
4.7K
4
1
IC2
AT24C04
IC-1 IZA646DR
C7
15K
1M
32
R300
4
R50
4
1.8K
3
D96
2
R96
1
D95
H
R95
G
D94
F
R94
E
3
D93
D
D97
B
2
R93
1
R97
C
D5
D6
11ES1
R-2397
6
A
A
B
C
D
E
F
G
H
KEY UNIT
R93~R101: 15K X 9
R-2397
1
2
4
3
A
5
6
A
1
10
20
26
1
D I P
2
R4
R300
32
R20
B
4
5
25
20
50
15
55
10
1
B
Q41
R41
5
45
D96
40
1
R71
33
R101
R100
R99
R96
D95
D94
D93
(D92)
(D91)
D97
B
R95
R94
R93
(R92)
(R91)
R97
R96
3
(J1)
10
E
3
B (Q201)
10
C
(J3)
1
5
60
(D200)
(J2)
3
1
64
R43
R42
(J7)
(J8)
2
C
E
(D201)
R40
12
(Q200)
(D74
.R50)
3
1
5
D
D
(D85)
4
4
1
5
8
12
R63
(J11)
R65
E
E
1
3 (1)
F
5 (3)
F
9 (7)
(9)
G
G
(ZD3)
H
H
Figure S-3. Printed Wiring Board
1
2
4
3
33
5
6
R-2397
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
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
1-26
1-27
1-28
1-29
FH-HZA050WRE0
QSOCLA011WRE0
FH-HZA049WRE0
FPWBFA296WRE0
QFSHDA019WRE0
QACCVA066WRE0
DH-HZA009WRK0
FW-QZA106WRK0
RTHM-A091WRE0
QSW-MA085WRE0
QSW-MA086WRE0
QSW-MA095WRE0
QSW-MA095WRE0
QSW-MA095WRE0
RC-QZA165WRE0
RLMPTA028WRE0
RMOTDA209WRE0
RTHM-A037WRE0
RTHM-A057WRE0
RV-MZA239WRE0
QFS-CA017WRE0
QFS-CA007WRE0
QFS-CA018WRE0
RR-WZA020WRE0
FMOTEA309WRK0
RTHM-A058WRE0
RTRN-A459WRE0
RFIL-A004WRE0
RFIL-A002WRE0
Magnetron thermistor
Oven lamp socket
Intake thermistor
Noise filter
Fuse holder
Power supply cord for European continental use
Exhaust thermistor
High voltage rectifier assembly
Oven thermal cut-out 115˚C
Stop switch
Monitor switch
1st. latch switch
2nd. latch switch
3rd. latch switch
High voltage capacitor
Oven lamp
Stirrer motor
Magnetron thermal cut-out 145˚C
Magnetron thermal cut-out 145˚C
Magnetron
Weak point A017
Fuse F6.3A
Weak point A018
Monitor resistor 4.3 Ω 20W
Blower motor
Thermal cut-out 115˚C
High voltage transformer
Ferrite clamp R
Ferrite clamp
2- 1
2- 2
2- 3
2- 4
2- 5
2-5-1
2-5-2
2-6
2-7
FDAI-A183WRW0
PSHEGA006WRE0
PSHEGA007WRE0
GCOVAA250WRW0
FFTASA064WRY0
PCUSU0407WRP0
PREFHA059WRP0
GCABUA523WRP0
PZETEA071WRP0
Base plate assembly
Rubber sheet A
Rubber sheet B
Rear cabinet
Oven lamp access cover assembly
Cushion
Lamp reflector
Outer case cabinet
Cabinet insulation sheet
3- 1
3- 1A
3- 1B
3- 1C
3- 1D
3- 1E
3- 1F
3- 1G
3- 1H
C1
C2
C3
C4
C5
C6-7
C8
C9
C20
C21
C22
C30
C61-62
C70
C71
C72
C74
DPWBFB382WRU0
QCNCMA308DRE0
QCNCMA312DRE0
QCNCMA145DRE0
QCNCWA030DRE0
QCNCMA039DRE0
QLUG-A002PRE0
RV-KXA053DRE0
PCUSGA359WRP0
VCKYD11HF104Z
RC-EZA192DRE0
VCEAB31HW335M
VCKYB11EX103N
VCEAB31AW476M
VCKYD11CY103N
VCEAB31CW107M
VCEAB31EW226M
VCKYD11CY103N
VCKYF31HF103Z
VCKYD11CY103N
VCKYD11CY103N
VCEAB31EW226M
VCKYF31HF103Z
VCKYD11CY103N
VCKYB11EX103N
VCKYD11HF104Z
Control unit
4-pin connector (A)
3-pin connector (B)
3-pin connector (D)
12-pin connector (G)
3-pin connector (H)
Tab terminal (TAB1-4)
Fluorescent display tube
Cushion
Capacitor
0.1 uF
50V
Capacitor 1000 uF
35V
Capacitor
3.3 uF
50V
Capacitor 0.01 uF
25V
Capacitor
47 uF
10V
Capacitor 0.01 uF
16V
Capacitor
100 uF
16V
Capacitor
22 uF
25V
Capacitor 0.01 uF
16V
Capacitor 0.01 uF
50V
Capacitor 0.01 uF
16V
Capacitor 0.01 uF
16V
Capacitor
22 uF
25V
Capacitor 0.01 uF
50V
Capacitor 0.01 uF
16V
Capacitor 0.01 uF
25V
Capacitor
0.1 uF
50V
1
1
1
1
3
1
1
1
1
1
1
1
1
1
2
1
2
1
1
2
1
1
2
1
1
1
2
2
2
AP
AH
AL
AW
AH
BG
AP
BB
AK
AF
AF
AF
AF
AF
AX
AK
AR
AG
AG
BL
AF
AD
AD
AF
BH
AG
BP
AM
AP
1
2
2
1
1
1
1
1
1
BC
AF
AE
AX
AN
AA
AF
BA
AF
1
1
1
1
1
1
4
1
2
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
BQ
AC
AB
AB
AF
AB
AB
AW
AC
AB
AD
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
CABINET PARTS
CONTROL PANEL PARTS
34
R-2397
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
C80
C81
C82
C200
CF1
D1-4
D5
D6-7
D61-64
D70
D71
D81
D83-84
D93-97
IC1
IC2
Q1
Q2
Q20
Q40
Q41
Q80
Q81
Q83-84
R1
R3
R4
R5
R6
R20
R31
R32
R33
R40
R41
R42
R43
R50
R61-62
R63-64
R65-66
R67-68
R70
R71
R72
R73
R74
R79
R80
R83-84
R93-101
R200
R201
R300
(J2)
(J3)
RY1
RY3-4
SP1
T1
CT1-2
VRS1
ZD1
ZD2
3- 2
3- 2-1
3- 2-2
3- 2-3
3- 3
3- 4
3- 5
3- 6
PART NO.
VCEAB31HW104M
VCEAB31HW225M
VCEAB31HW105M
VCKYD11CY103N
RCRS-A010DRE0
VHD11ES1///-1
VHD1SS270A/-1
VHD11ES1///-1
VHD1SS270A/-1
VHD11ES1///-1
VHD1SS270A/-1
VHD1SS270A/-1
VHD1SS270A/-1
VHD1SS270A/-1
RH-IZA646DRE0
RH-IZA571DRE0
VS2SB953-PQ-4
VS2SA1561TL-3
RH-TZA037CBE0
RH-TZA037CBE0
VS2SB1238//-3
VSDTA114YS/-3
VSDTD143ES/-3
VSDTB143ES/-3
VRD-B12EF182J
VRD-B12HF561J
VRD-B12EF102J
VRD-B12EF153J
VRD-B12HF150J
VRD-B12EF153J
VRD-B12EF153J
VRD-B12EF272J
VRD-B12EF103J
VRD-B12EF332J
VRD-B12EF203J
VRD-B12EF393J
VRD-B12EF103J
VRD-B12EF182J
VRN-B12EK152F
VRD-B12EF102J
VRD-B12EF304J
VRD-B12EF473J
VRD-B12EF101J
VRD-B12EF303J
VRD-B12EF112J
VRD-B12EF203J
VRD-B12EF332J
VRD-B12EF473J
VRD-B12EF471J
VRD-B12HF390J
VRD-B12EF153J
VRD-B12EF472J
VRD-B12EF682J
VRD-B12EF105J
VRD-B12EF822J
VRD-B12EF363J
RRLY-A078DRE0
RRLY-A059DRE0
RALM-A003DRE0
RTRNPA080DRE0
RTRN-A060DRE0
RH-VZA010DRE0
VHEHZ12C1//-1
VHEHZ4C3///-1
FPNLCB159WRK0
FUNTKA775WRE0
HDECAA195WRP0
PCUSUA451WRP0
LANGTA243WRW0
XEPSD30P10XS0
XEPSD40P12000
XFTSD40P08K00
DESCRIPTION
Capacitor
0.1 uF
50V
Capacitor
2.2 uF
50V
Capacitor
1.0 uF
50V
Capacitor 0.01 uF
16V
Ceramic resonator CST4.00MGW
Diode (11ES1)
Diode (1SS270A)
Diode (11ES1)
Diode (1SS270A)
Diode (11ES1)
Diode (1SS270A)
Diode (1SS270A)
Diode (1SS270A)
Diode (1SS270A)
LSI
IC (AT24C04)
Transistor (2SB953)
Transistor (2SA1561TL)
Transistor (KRA101M)
Transistor (KRA101M)
Transistor (2SB1238)
Transistor (DTA114YS)
Transistor (DTD143ES)
Transistor (DTB143ES)
Resistor
1.8k ohm
1/4W
Resistor
560 ohm
1/2W
Resistor
1.0k ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
15 ohm
1/2W
Resistor
15k ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
2.7k ohm
1/4W
Resistor
10k ohm
1/4W
Resistor
3.3k ohm
1/4W
Resistor
20k ohm
1/4W
Resistor
39k ohm
1/4W
Resistor
10k ohm
1/4W
Resistor
1.8k ohm
1/4W
Resistor
1.5k ohm(F) 1/4W
Resistor
1.0k ohm
1/4W
Resistor
300k ohm
1/4W
Resistor
47k ohm
1/4W
Resistor
100 ohm
1/4W
Resistor
30k ohm
1/4W
Resistor
1.1k ohm
1/4W
Resistor
20k ohm
1/4W
Resistor
3.3k ohm
1/4W
Resistor
47k ohm
1/4W
Resistor
470 ohm
1/4W
Resistor
39 ohm
1/2W
Resistor
15k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
6.8k ohm
1/4W
Resistor
1.0M ohm
1/4W
Resistor
8.2k ohm
1/4W
Resistor
36k ohm
1/4W
Relay (OJ-SH-118LM)
Relay (VS14MB-NR-SH6)
Buzzer (PS3025P02)
Touch control transformer
Current transformer
Varistor (TNR15G471K)
Zener diode (HZ12C1)
Zener diode (HZ4C-3)
Control panel frame with key unit assembly
Key unit
Decoration metal fittings
Cushion
Control panel mounting angle
Screw; control unit mounting
Screw; control panel mounting angle mounting
Screw; decoration panel mounting for earth
35
Q'TY CODE
1
1
1
1
1
4
1
2
4
1
1
1
2
5
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
1
1
1
1
1
1
2
9
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
6
1
1
AM
AA
AA
AA
AD
AB
AA
AB
AA
AB
AA
AA
AA
AA
AX
AP
AG
AA
AA
AA
AA
AB
AC
AC
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AG
AK
AG
AU
AH
AE
AA
AA
AZ
AU
AP
AB
AF
AA
AA
AB
R-2397
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
3- 7
PART NO.
PCUSGA380WRP0
Cushion
DESCRIPTION
PCUSUA265WRP0
PDUC-A565WRW0
FOVN-A336WRY0
PFILWA053WRP0
MLEVPA153WRF0
MLEVPA154WRF0
MLEVPA155WRF0
MSPRCA075WRE0
MSPRCA076WRE0
PHOK-A081WRF0
PZETEA047WRP0
PDUC-A566WRF0
PDUC-A567WRF0
FGLSPA021WRY0
FPLT-A006WRY0
FPLT-A005WRY0
LANGKA762WRP0
LANGQA370WRP0
LBNDKA075WRP0
PGIDHA054WRW0
NSFTPA031WRF0
PCOVPA310WRF0
PCUSGA405WRP0
PCUSGA409WRP0
PCUSUA413WRP0
PCUSUA415WRP0
PCUSUA416WRP0
PDUC-A607WRW0
PCUSUA414WRP0
LANGQA251WRW0
LANGQ0382WRM0
LANGFA172WRP0
LBSHCA012WRE0
PCUSGA441WRP0
FFIL-A003WRK0
HDECEA001WRP0
HDECQA146WRM0
HDECQA147WRM0
LANGKA679WRM0
MHNG-A215WRM0
MHNG-A216WRM0
PCUSGA275WRP0
PCUSUA417WRP0
MSPRCA101WRE0
PCUSUA458WRP0
LANGQA440WRM0
PCUSGA289WRP0
PCUSUA268WRP0
PZETEA073WRP0
PCUSUA448WRP0
PCUSGA442WRP0
PCUSGA443WRP0
PCUSUA447WRP0
PCUSGA045WRP0
Cushion
Exhaust duct
Oven cavity
Oven light screen
Switch lever A
Switch lever B
Switch lever C
Switch spring A
Switch spring B
Latch hook
Switch insulator
Mg air guide
Mg air guide cover
Ceramic shelf
Stirrer antenna upper assembly
Stirrer antenna lower assembly
Partition angle R
Oven lamp mounting plate
Capacitor holder
Water-proof cover
Antenna motor shaft
Splash cover
Cushion
Cushion
Cushion
Cushion
Cushion
Mg exhaust duct
Cushion
Noise filter angle
Earth angle
Chassis support
Cord bushing
Cushion
Air intake filter assembly
Decoration sash
Corner cap left
Corner cap right
Fixing angle s
Upper oven hinge
Lower oven hinge
BLM cushion
Cushion
Switch spring C
V/P cushion
Earth angle
Cushion
Cushion
Insulator sheet B
Cushion
Cushion
Cushion
Cushion
Cushion
Q'TY CODE
1
AA
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
4-38
4-39
4-40
4-41
4-42
4-43
4-44
4-45
4-46
4-47
4-48
4-49
4-50
4-51
4-52
4-53
4-54
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
2
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AA
AZ
BR
AE
AC
AC
AC
AB
AB
AP
AC
AN
AN
BD
AT
AY
AE
AD
AD
AF
AH
AZ
AF
AE
AG
AC
AC
AP
AD
AF
AB
AH
AD
AL
AV
AR
AE
AE
AD
AG
AG
AB
AB
AC
AB
AE
AB
AA
AF
AC
AD
AC
AC
AA
1
1
1
1
1
1
2
2
1
2
1
2
3
BP
BH
BD
AP
AR
AU
AF
AM
AV
AF
AH
AE
AA
DOOR PARTS
∆
∆
5
5- 1
5- 2
5- 3
5- 4
5- 5
5- 6
5- 7
5- 8
5- 9
5-10
5-11
5-12
DDORFA746WRK0
FDORFA289WRT0
GCOVAA242WRY0
FHNDMA011WRY0
GCOVHA350WRF0
JHNDPA169WRM0
LANGKA766WRP0
PCUSGA430WRP0
PGLSPA457WRE0
PPACGA142WRP0
PSHEPA520WRE0
PSPA-A102WRE0
XFPSD40P08K00
Door assembly
Door panel assembly
Door case
Door release lever assembly
Choke cover
Door handle
Outside window fixing plate
Cushion
Door glass
Door case packing
Sealer film
Door screen spacer
Screw : 4mm x 8mm
36
R-2397
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
∆
REF. NO.
5-13
5-14
5-15
5-16
5-17
5-18
5-19
5-20
5-21
PART NO.
XHTSD40P08RV0
FANGKA200WRY0
FLEVFA019WRY0
LSTPCA002WRM0
MLEVPA220WRF0
MSPRCA097WRE0
HBDGCA069WRE0
XEPSD40P20000
XWSSD40-10000
DESCRIPTION
Screw : 4mm x 8mm
Latch fixing angle
Joint lever
Latch head
Head lever
Latch spring
Door badge
Screw : 4mm x 20mm
Washer : 4mm x 1mm
Q'TY CODE
4
AA
1
AQ
1
AP
2
AM
1
AM
1
AG
1
AF
2
AB
2
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
6-13
6-14
6-15
6-16
6-17
6-18
6-19
TINSMA004WRR0
TLABHA029WRR0
FW-VZB402WRE0
FW-VZB585WRE0
LHLDWA021WRE0
TCAUHA083WRR0
LHLDWA040WRE0
TLABSA054WRR0
PTUB-A042WRE0
TCAUHA082WRR0
LHLDWA043WRE0
TLABSA069WRR0
TSPCNC161WRR0
TCAUHA176WRR0
TLABSA064WRR0
TLABSA066WRR0
LHLDWA047WRE0
LHLDWQ004YBE0
LHLDWA023WRE0
Instruction manual (German, French, Dutch, Italian, Spanish)
Menu sticker
Switch harness
Main wire harness
Harness lifter
Belgium label
Wire holder A
Fuse label
Tube
Caution label
Wire saddle S
Fuse label F6.3A
Rating label
Caution label
A017 label
Equipotential label
Space clip
Purse lock L
Wire saddle
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
AH
AC
AG
BB
AE
AB
AB
AB
AF
AC
AC
AB
AH
AC
AC
AD
AC
AA
AB
4
4
1
2
1
1
1
4
2
4
1
1
3
2
2
8
8
13
1
3
2
2
1
3
2
4
2
1
2
2
1
4
8
1
1
2
6
2
AB
AB
AB
AA
AA
AA
AB
AB
AA
AB
AC
AB
AB
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AC
AB
AA
AA
AA
AA
AA
SCRE, NUTS AND WASHERS
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
7-11
7-12
7-13
7-14
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-23
7-24
7-25
7-26
7-27
7-28
7-29
7-30
7-31
7-32
7-33
7-34
7-35
7-36
7-37
7-38
XCBWW30P08000
XFPSD50P12KS0
XFTSD40P10RV0
XOTSD40P06000
XFTSD40P12000
XWSSD40-10000
LX-WZA035WRE0
XOTWW40P08000
LX-CZA038WRE0
PSPA-A101WRE0
XTBWW40P30000
XCBWW30P12000
XEPSD30P12XS0
LX-CZA057WRE0
XHPSD40P05000
XHTSD40P08RV0
XOTSD40P12000
XOTWW40P10000
XOTWW40P20000
XCPSD30P10000
XFPSD40P08K00
XOTSD40P12RV0
LX-BZA064WRE0
XCPSD30P06000
XOTSD40P10000
XBPUW40P04000
XBTUW40P10000
XFTSD40P08000
XTPSD40P08000
XWWSD50-06000
XONSC40P10000
LX-BZA110WRE0
XHPSD50P08000
XBPSD30P28KS0
XNESD30-24000
XJPSD40P10000
XOTSC40P12000
LX-EZA004WRE0
Screw : 3mm x 8mm
Screw : 5mm x 12mm
Screw : 4mm x 10mm
Screw : 4mm x 6mm
Screw : 4mm x 12mm
Washer : 4mm x 1mm
Special washer
Screw : 4mm x 8mm
Special screw
Washer
Screw : 4mm x 30mm
Screw : 3mm x 12mm
Screw : 3mm x 12mm
Special screw
Screw : 4mm x 5mm
Screw : 4mm x 8mm
Screw : 4mm x 12mm
Screw : 4mm x 10mm
Screw : 4mm x 20mm
Screw : 3mm x 10mm
Screw : 4mm x 8mm
Screw : 4mm x 12mm
Special screw
Screw : 3mm x 6mm
Screw : 4mm x 10mm
Screw : 4mm x 4mm
Screw : 4mm x 10mm
Screw : 4mm x 8mm
Screw : 4mm x 8mm
Washer : 5mm x 0.6mm
Screw : 4mm x 10mm
Special screw
Screw : 5mm x 8mm
Screw : 3mm x 28mm
Nut : 3mm x 2.4mm
Screw : 4mm x 10mm
Screw : 4mm x 12mm
Special screw
37
R-2397
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
3. PART NO.
1
2
2. REF. NO.
4.DESCRIPTION
4
3
6
5
A
A
1-28 RFIL-A004WRE0
B
B
1-28 RFIL-A004WRE0
C
C
POWER SUPPLY CORD
These ferrite clamps are included in High voltage rectifire assembly
D
D
1-29 RFIL-A002WRE0
6-2 PTUB-A042WRE0
E
E
F
F
G
G
H
H
1
2
4
3
38
5
6
R-2397
2
1
4
3
6
5
6-14
OVEN AND CABINET PARTS
2-5-2
7-31
2-6
2-5-1
A
A
7-37
2-5
4-20
7-14
7- 8
6-6
7-29
6-14
7-18
B
B
7-23
7-11
7-18
6-10
6-13
7-8
2-7
4-43
7-14
4-26
7-18
7-12
2-4
7-1
4-39
1-7
4-24
1-9
4-25
4-2
C
4-49
7-1
7-22
1-16
7-15
1-17
6-11
D
1-23
1-18
4-54
7-24
1-5
1-1
7-18
4-13
4-21
7-16
7-32
x-2
6-17
6-18
7-33
4-12
7-36
6-19
A2
4-26
A1
4-40
E
7-20 1-22
1-23
A2
A1
4-27
7-33
1-5
1-20
7-36
4-4
4-28
7-18
7-18
4-3
D
7-25
4-29
7-4
6-8
6-12
4-50
1-15
7-32
7-25
1-20
4-19
4-41
E
4-32
4-1
4-15
6-16
7-13
7-28
4-27
1-24
4-18
4-37
4-33
7-19
7-1
7-17
C
1-6
4-27
4-48
1-2
7-5
7-7
7-6
4-46
4-53
4-42 To conner of lower
wavegide
7-24
7-16
1-8
4-17
7-26
1-26
7-10
7-26
F
1-15
7-10
1-19
4-16
4-21
7-1
4-9
7-2
1-27
7-15
7-30
4-38
4-34
4-22
7-2
4-5
1-21
6-15
1-25
1-13
7-21
7-27
1-4
4-10
G
4-11
4-9
1-10
4-7
4-30 4-31
4-51
4-44
4-6
1-27
6-5
4-23
1-11
7-21 7-35
7-30
G
4-47
4-8
7-38
4-36
1-17
F
7-16
7-16
1-14
1-12
7-34
7-3
2-1
4-52
4-14
H
4-35
7-4
7-17
7-17
4-45
7-16
1
H
2-3 x2
2
2-2 x2
4
3
39
5
6
R-2397
2
1
4
3
CONTROL PANEL PARTS
6
5
3-7
3-2-3
3-1
A
A
3-2
3-2-2
B
B
3-5
3-4
C
C
3-6
3-3
1-3
D
D
3-2-1
DOOR PARTS
5-4
E
E
5-11
5-10
5-11
5-14
5-21
5-1
5
5-20
5-12
5-15
F
F
5-18
5-8
5-6
5-16
5-13
5-17
5-9
5-7
G
G
5-6
5-13
5-2
5-19
5-3
H
H
5-5
1
2
4
3
40
5
6
R-2397
PACKING ADD KIT
* CPADBA203WRK0
DOOR PROTECTION SHEET
* SPADPA552WRE0
WRAP COVER
DOOR PAD
* SPADF0341WRE0
TRAY HOLDER
* SPADPA551WRE0
PACKING CASE
* SPAKCC551WRE0
* Not replaceable items.
PRINTING MATER
INSTRUCTION BOOK
41
R-2397
'97 SHARP CORP. (5U0.10E) Printed in Japan
42