Sharp R-210A Service manual
R-210A
SERVICE MANUAL
SX737R210APT/
MICROWAVE OVEN
COOKING CONTROL
DEFROST
MED
RICE
MED LOW
MED HIGH
LOW
HIGH
DEFROST kg
TIMER
RICE
1.0
MODEL
R-210A
0.5
4
2
DOOR OPEN
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 INFORMATION ................................................................................................................................. 2
APPEARANCE VIEW ......................................................................................................................................... 3
OPERATION SEQUENCE ................................................................................................................................. 4
FUNCTION OF IMPORTANT COMPONENTS .................................................................................................. 5
SERVICING ........................................................................................................................................................ 6
TEST PROCEDURE .......................................................................................................................................... 8
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ............................................................. 13
MICROWAVE MEASUREMENT ...................................................................................................................... 19
WIRING DIAGRAM .......................................................................................................................................... 20
PICTORIAL DIAGRAM ..................................................................................................................................... 21
PARTS LIST ...................................................................................................................................................... 22
SHARP CORPORATION
R-210A
R-210A
SERVICE MANUAL
MICROWAVE OVEN
PRODUCT SPECIFICATIONS
R-210A
GENERAL IMPORTANT INFORMATION
APPEARANCE VIEW
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.
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM
THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
SERVICING AND
TROUBLESHOOTING CHART
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.
TEST PROCEDURE
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WARNING
MICROWAVE MEASUREMENT
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.
WIRING DIAGRAM
Servicing and repair work must be carried out only by trained
service engineers.
PARTS LIST
All the parts marked "*" on parts list are used at voltages more
than 250V.
Removal of the outer wrap gives access to potential 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
R-210A
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
Power Requirements
DESCRIPTION
110 Volts
60 Hertz
Single phase, 2 wire
Power Consumption
1.1 KW
Power Output
700 watts nominal of RF microwave energy (IEC-705)
600 watts nominal of RF microwave energy (2 litre water load )
Operating frequency 2450 MHz
Case Dimensions
Width 450 mm
Height 295 mm including foot
Depth 355 mm
Cooking Cavity Dimensions
Width 288 mm
Height 195 mm
Depth 319 mm
Turntable diameter
272mm
Control Complement
30 min. Single Speed Timer.
Microwave Power for Variable Cooking
Repetition Rate;
HIGH ............................. Full power throughout the cooking time
MED HIGH (MEDIUM HIGH) ......... approx. 70% of FULL Power
MEDIUM ........................................ approx. 50% of FULL Power
MED LOW/ DEFROST ................... approx. 30% of FULL Power
(MEDIUM LOW/ DEFROST)
LOW ............................................... approx. 10% of FULL Power
Set Weight (Approx.)
Approx. 13 kg
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED.
2
R-210A
APPEARANCE VIEW
2 10
3
1
OVEN
13
9
COOKING CONTROL
DEFROST
MED
MED LOW
RICE
MED HIGH
HIGH
LOW
TIMER
DEFROST kg
RICE
1.0
11
0.5
4
2
DOOR OPEN
8
14
4 5
1.
2.
3.
4.
5.
6
Ventilation openings
Oven lamp
Door hinges
Door safety latches
See through door
7
4
15 12
6. Door seals sealing surfaces
7. Coupling
8. Door open button
9. Control panel
10.Waveguide cover
11.Power supply cord
12.Rating label
13.Turntable
14.Roller stay
15.Earth wire
CONTROL PANEL
1 VARIABLE COOKING CONTROL
There are five power levels. The approximate percentage of microwave power for
each setting is:
HIGH
100%
MED HIGH (MEDIUM HIGH) 70%
MED (MEDIUM)
50%
MED LOW/ DEFROST
30%
(MEDIUM LOW/ DEFROST)
LOW
10%
2 MEAT DEFROST GUIDE
3 RICE COOKING GUIDE
4 TIMER (0-30 minutes)
Turn to set cooking time or weight of defrost
food.
COOKING CONTROL
DEFROST
MED
MED LOW
RICE
MED HIGH
HIGH
LOW
1
TIMER
DEFROST kg
2
RICE
3
1.0
4
0.5
4
DOOR OPEN
3
2
R-210A
OPERATION SEQUENCE
7-1. When the oven door is opened during or after the
cycle of a cooking program, the 1st latch switch and
2nd latch switch must open their (COM-NO) contacts
first. After that the contacts (COM-NC) of the monitor
switch can be closed.
7-2. When the oven door is closed. The contacts (COMNC) of the monitor switch must be opened and the
contacts (COM-NO) of the 2nd latch switch and the
1st latch switch must be closed.
7-3. When the oven door is opened and the (COM-NO)
contacts of the 1st latch switch and the contacts
(COM-NO) of the 2nd latch switch remain closed, the
fuse 13A will blow, the monitor switch is closed and a
short circuit is caused.
OFF CONDITION
1. When the timer knob is at " 0 ", the oven is OFF
condition.
2. Closing the oven door activates the 1st latch switch, the
2nd latch switch and monitor switch.
IMPORTANT:
When the oven door is closed, the contacts COM-NC of
the monitor switch must be open.
Figure O-1 on page 20
MICROWAVE COOKING CONDITION
HIGH COOKING
Set the variable cooking control to HIGH and then set the
timer.
Function sequence
Figure O-2 on page 20
MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
1. Following components are energized.
When the microwave oven is preset for variable cooking
power, the rated voltage is supplied to the power transformer intermittently within a 30-second time base through
the vari switch. The following levels of microwave power
are given.
Power transformer
Magnetron
H. V. fuse
H.V. capacitor
H.V. rectifier
Turntable motor
Timer motor
Fan motor
Oven lamp
2. Rated voltage is supplied to the primary winding of the
power 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.
3. The filament winding voltage (3.3 volts) heats the
magnetron filament and the high voltage (2000 volts) is
sent to the voltagedoubling circuit, where it is doubled
to negative voltage of approximately 4000 volts D.C..
4. 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.
5. When the cooking time is up, the timer returns to "0",
the bell rings and the contacts of the timer are opened.
Then following components are turned off.
Power transformer
Turntable motor
H. V. fuse
Magnetron
H.V. capacitor
H.V. rectifier
SETTING
1st latch Switch
Monitor Switch
2nd latch switch
Contact
COM-NO
COM-NC
COM-NO
Condition
During
Cooking
Closed
Opened
Closed
Approx. 100%
23.2 sec. ON
6.8 sec. OFF
16.5 sec. ON
13.5 sec. OFF
MEDIUM HIGH
Approx. 70%
MEDIUM
Approx. 50%
9.8 sec. ON 20.2 sec. OFF
MEDIUM LOW
Approx. 30%
5.0 sec. ON
LOW
Note:
Timer motor
Fan motor
Oven lamp
6. When the oven door is opened during a cooking cycle,
the switches come to the following positions and they
are common to the other cooking conditions too.
Switch
30 sec. ON
HIGH
Oven Door
Open(No cooking)
Opened
Closed
Opened
The circuit to the power transformer, turntable motor,
timer motor, fan motor and oven lamp are cut off when
the COM-NO contacts of the 2nd latch switch and 1st
latch switch are made open. The timer stops to indicate
how much cooking time remains.
7. MONITOR SWITCH CIRCUIT
The monitor switch is mechanically controlled by the
oven door, and monitors the operation of the 1st latch
switch and 2nd latch switch.
4
25 sec. OFF
Approx. 10%
The ON/OFF time ratio does not exactly correspond to the percentage of microwave power,
because approx. 2 seconds are needed for heating up the magnetron filament.
R-210A
FUNCTION OF IMPORTANT COMPONENTS
setting of cook time or failure of control unit. Under normal
operation, the temp. fuse remains closed. However, when
abnormally high temperatures are reached within the
oven cavity, the temp. fuse will open at 120˚C, causing the
oven to shut down. The defective fuse must be replaced
with a new one.
DOOR OPEN MECHANISM
The door can be opened by pushing the open button on the
control panel. When the open button is pushed, the switch
lever on the latch hook is moved upward, operating the
latch head. The latch head is moved upward, and released
from the latch hook. Now, the door can be opened.
LATCH HOOK
LATCH
HEADS
THERMAL CUT-OUT 95˚C (MAGNETRON )
The thermal cut-out located on the top of the oven cavity
is designed to prevent damage to the magnetron if an over
heated condition develops in the tube due to cooling fan
failure, obstructed air guide, dirty or blocked air intake, etc.
Under normal operation, the thermal cut-out remains
closed. However, when abnormally high temperatures are
reached within the magnetron, the thermal cut-out will
open at 95˚C, causing the oven to shut down. When the
magnetron has cooled to 75˚, the thermal cut-out closes
and cook cycle will resume.
1ST. LATCH
SWITCH
MONITOR
SWITCH
DOOR
2ND. LATCH
SWITCH
SWITCH LEVER
NOISE FILTER
Figure D-1. Door Open Mechanism
The noise filter prevents the radio frequency interference
that might flow back in the power circuit.
1ST. LATCH SWITCH AND 2ND. LATCH SWITCH
1. When the oven door is closed, the contacts (COM-NO)
must be closed.
2. When the oven door is opened, the contacts (COMNO) must be opened.
The turntable motor drives the roller stay to rotate the
turntable.
MONITOR SWITCH
FAN MOTOR
1. When the oven door is closed, the contacts (COM-NC)
must be opened.
2. When the oven door is opened, the contacts (COMNC) must be closed.
3. If the oven door is opened and the contacts (COM-NO)
of the 1st latch switch and 2nd latch switch fail to open,
the fuse blows simultaneously with closing the contacts (COM-NC) of the monitor switch.
The fan motor drives a blade which draws external cool air.
This cool air is directed through the air vanes surrounding
the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and
vapours given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.
TURNTABLE MOTOR
TIMER MOTOR (WITH VARI-SWITCH)
Timer switch
1. When the timer is at "0" position, the switch of the timer
are opened.
2. When the timer is turned clockwise from "0" position,
the switch of the timer are closed.
CAUTION: BEFORE REPLACING A FUSE TEST THE
1ST LATCH SWITCH, 2ND LATCH SWITCH
AND MONITOR SWITCH FOR PROPER
OPERATION. (REFER TO CHAPTER "TEST
PROCEDURE".)
Vari-switch
If the variable cooking control is set at HIGH, MEDIUM
HIGH, MEDIUM, MEDIUM LOW or LOW cooking position, Rated voltage is supplied to the power transformer
intermittently within a 30 seconds time base. The following chart shows the vari-switch operation in the
various modes.
FUSE
1. The fuse blows when the contacts (COM-NO) of the 1st
latch switch and 2nd latch switch remain closed with the
oven door open and when the monitor switch closes.
2. If the wire harness or electrical components are shortcircuited, the fuse blows to prevent an electric shock of
fire hazard.
SETTING
30 sec. ON
HIGH
HIGH VOLTAGE FUSE
Approx. 100%
23.2 sec. ON
6.8 sec. OFF
16.5 sec. ON
13.5 sec. OFF
MEDIUM HIGH
The high voltage fuse blows when the high voltage rectifier
or the magnetron is shorted.
Approx. 70%
MEDIUM
Approx. 50%
9.8 sec. ON 20.2 sec. OFF
TEMPERATURE FUSE 120˚C (OVEN)
MEDIUM LOW
The temp. fuse located on the top of the oven cavity is
designed to prevent damage to the oven if the foods in the
oven catch fire due to over heating produced by improper
Approx. 30%
5.0 sec. ON
LOW
5
25 sec. OFF
Approx. 10%
R-210A
Note:
because approx. 2 seconds are needed for heating up the magnetron filament.
The ON/OFF time ratio does not exactly correspond to the percentage of microwave power,
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, Power transformer, Magnetron, High voltage rectifier assembly, High voltage Fuse, 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 turntable, close the door
and set the power level to HIGH. And set the microwave
timer for two (2) minutes. When the two minutes has
elapsed (timer at zero) carefully check that the water is
now hot. If the water remains cold carry out 3D checks
and re-examine the connections to the component
being tested.
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 highvoltage rectifier) against the chassis with the use
of an insulated screwdriver.
Sharp recommend that wherever possible fault-finding
is carried out with the supply disconnected. It may in,
some cases, be necessary to connect the supply after
the outer case has been removed, in this event carry out
3D checks and then disconnect the leads to the primary
of the power 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 power transformer.
When all service work is completed and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test should be carried out.
TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the
checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a
procedure letter which will be found in the "Test Procedure "section.
IMPORTANT: If the oven becomes inoperative because of a blown fuse 13A in the 1st. latch switch - 2nd. latch switch
- monitor switch circuit, check the 1st. latch switch, 2nd. latch switch and monitor switch before replacing
the fuse 13A.
6
R-210A
CONDITION
Fuse 13A blows when
power cord is plugged into
wall outlet.
OFF
CONDITION
Fuse 13A blows when the
door is opened.
Home fuse blows when
power cord is plugged into
wall outlet.
Oven does not operate at all.
Oven goes into cook cycle but shuts down before
end of cooking cycle.
Oven lamp does not light.
(Fan motor rotates)
Fan motor does not operate, but oven lamp lights.
COOKING
CONDITION
Timer motor does not operate, but oven lamp lights.
Turntable motor does not operate, but oven lamp lights.
Oven seems to be operating but little or no heat is
produced in oven load. (Microwave power control is
set at "HIGH" position, and
turntable motor operates.)
Oven does not operate
properly in another position
except "HIGH" position.
7
H. V. FUSE
NOISE FILTER
BLOCKED COOLING FAN
WALL OUTLET
HOME FUSE OR BREAKER
MISADJUSTMENT SWITCH
BLOCKED VENTILATION OPENING
OVEN LAMP OR SOCKET
SHORTED WIRE HARNESS
OPENED WIRE HARNESS
J K
POWER SUPPLY CORD
FUSE 13A
TURNTABLE MOTOR
I G G H
FAN MOTOR
I
TIMER VARI. SWITCH
TIMER MOTOR
TEMPERATURE FUSE 120˚C (OVEN)
PROBLEM
THERMAL CUT-OUT 95˚C (MG)
MONITOR SWITCH
2ND. LATCH SWITCH
1ST. LATCH SWITCH
HIGH VOLTAGE CAPACITOR
MAGNETRON
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
H.V. RECTIFIER ASSEMBLY
A B C D E E E F F I
POWER TRANSFORMER
TEST PROCEDURE
TIMER CONTACT
TROUBLESHOOTING CHART
R-210A
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 CHECKS.
Isolate the magnetron from the high voltage circuit by removing all leads connected to the 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 a short circuit 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)
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 can be measured by using water load how much it can be absorbed by the water
load. 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.........60 sec.
P = 70 x ∆ T
Measuring condition:
1. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start of the test.
3. Temperature of the water
The initial temperature of the water is (10±2)˚C.
4. Select the initial and final water temperature so that the maximum difference between the final
water temperature and the ambient temperature is 5˚C.
5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat.
6. The graduation of the thermometer must be scaled by 0.1˚C at minimum and an accurate
thermometer.
7. The water load must be (1000±5) g.
8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included.
NOTE: The operation time of the microwave oven is “t + 2” sec. 2 sec. is magnetron filament heatup time.
Measuring method:
1. Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11˚C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆ T of
(10 ± 2)˚C.
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.
8
R-210A
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Initial temperature .................................................................................................. T1 = 11°C
Temperature after (60 + 2) = 62 sec. ..................................................................... T2 = 21°C
Temperature difference Cold-Warm .................................................................... ∆T1 = 10°C
Measured output power
The equation is “P = 70 x ∆T” ....................................................... P = 70 x 10°C = 700 Watts
JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 70 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚C
T2˚C
Heat up for 62 sec.
MICROWAVE OUTPUT POWER (2 Litre water load)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (with outer case fitted).
Microwave output power from the magnetron can be measured by way of substitution, i.e. it can be
measured by using a water load how much it can be absorbed by the water load. To measure the
microwave output power in the microwave oven, the relation of calorie and watt is used.
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 / 4.2 = V x ∆ T
P (W) = 4.2 x V x ∆T / t
Our condition for water load is as follows:
Room temperature .................. 23±2˚C
Power supply Voltage .................. Rated voltage
Water load. ...... 2000 ml Initial temperature ........ 23±1°C Heating time ..... 2 min. 20 sec.
P = 60 x ∆ T
Measuring method:
A) The two water containers must be prepared.
The water container must be one (1) litre beaker made of Pyrex glass and its diameter
approximately 12cm.
B) Put the one (1) litre water into each beaker (Each beaker has one litre water). The initial
temperature of the water should be 23±1˚C.
C) Mark T1 on the one beaker and mark T2 on the other one. And stir the water and measure the
temperature of water the thermometer and note them. The graduation of the thermometer must
be scaled by 0.1˚C at minimum and an accurate mercury thermometer is recommended.
D) Place the two (2) beakers as touching each other in the centre of the oven cavity.
E) Set the timer to 2 minutes and 20 seconds, start the oven at 100% power.
F) The time must be measured with stopwatch or wristwatch.
G) After 2 minutes and 20 seconds, stop the oven by opening the door.
H) Put the two (2) beakers out of the oven cavity and measure the temperature of the water by stirring
the water with thermometer and note them.
Example
Initial temperature............................................................................... T1 = 23˚C T2 = 24˚C
Temperature after 2 min. 22 sec. ...................................................... T1 = 33˚C T2 = 34˚C
Temperature difference Cold-Warm ............................................... ∆T1 = 10˚C ∆T2 = 10˚C
Mean temperature rise ∆T .......................... ∆T = (∆T1 ± ∆T2) / 2 = (10˚C+10˚C) / 2 = 10˚C
Measured output power
The equation is P= 60 x ∆T ......................................................... P= 60 x 10˚C = 600 Watts
NOTE: The measured output power should be at least ± 15 % of the rated output power.
9
R-210A
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
CAUTION: 1˚C CORRESPONDS TO 60 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1l
(T1 C)
1l
1l
(T2 C)
(T1 C)
1l
(T2 C)
Heat up for 2 min. 22 sec.
B
POWER TRANSFORMER TEST
WARNING: High voltages and large currents are present at the secondary winding and
filament winding of the power transformer. It is very dangerous to work near this
part when the oven is on. NEVER make any voltage measurements of the highvoltage circuits, including the magnetron filament.
CARRY OUT 3D CHECKS.
Disconnect the leads to the primary winding of the power transformer. Disconnect the filament and
secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low
range, it is possible to check the continuity of all three windings. The following readings should be
obtained:
a.Primary winding ................ 0.5 ohms approximately
b.Secondary winding ........... 107 ohms approximately
c.Filament winding .............. less than 1 ohm
If the reading obtained are not stated as above, then the power transformer is probably faulty and
should be replaced.
CARRY OUT 4R CHECKS.
C
HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested
using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the
high voltage rectifier and note the reading obtained. Reverse the meter leads and note this second
reading. The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.
CARRY OUT 4R CHECKS.
B
C
HIGH VOLTAGE RECTIFIER
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.
10
R-210A
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
CARRY OUT 3D CHECKS.
Table: Terminal Connection of Switch
Plunger Operation
Released
Depressed
COM to NO
O.C.
S.C.
COM to NC
S.C.
O.C.
COM;
NO;
NC;
S.C.;
O.C.;
Common terminal,
Normally open terminal
Normally close terminal
Short circuit
Open circuit
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
F
TEMPERATURE FUSE OR THERMAL CUT-OUT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out or temperature fuse. Then using an
ohmmeter, make a continuity test across the two terminals as described in the below.
CARRY OUT 4R CHECKS.
Table: Temperature Fuse or Thermal Cut-out Test
Parts Name
Temperature of "ON"
condition (closed circuit).
Temperature of "OFF"
condition (open circuit).
Indication of ohmmeter
(When room temperature is approx. 20˚C.)
Temp. fuse 120˚C
This is not resetable type. Above 120˚C
Closed circuit
Thermal cut-out 95˚C
Below 75˚C
Closed circuit.
Above 95˚C
If incorrect readings are obtained, replace the temperature fuse or thermal cut-out.
An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due
to resistricted ventilation, cooling fan failure.
An open circuit temperature fuse (OVEN) indicates that the food in the oven cavity may catch fire, this
may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
G
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately 60 Ω
Turntable motor
Approximately 3.4 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
H
FUSE 13A
CARRY OUT 3D CHECKS.
If the fuse 13A is blown when the door is opened, check the 1st latch switch, 2nd latch switch, monitor switch
and monitor resistor.
11
R-210A
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
If the fuse 13A is blown by incorrect door switching replace the defective switch(es) and the fuse 13A.
If the fuse 13A is blown, there is a shorts or grounds in electrical parts or wire harness.
Check them and replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION:
I
Only replace fuse with the correct value replacement.
TIMER MOTOR (WITH VARI-SWITCH) TEST
M
6
5
CARRY OUT 3D CHECKS before any of the following timer tests.
2
1
4
3
Vari switch
Timer motor with Vari-Switch
TIMER SWITCH- CONTACTS
Disconnect the leads from terminals described at following table. Connect an ohmmeter across
terminals described at following table.
Advance the timer and check that a short circuit reading is obtained on the meter.
Turn the timer back to the zero (0) position and check that an open circuit reading is obtained on the
meter. If these readings are not obtained then replace the timer.
Disconnecting and checking terminals
1 and 2
TIMER - MOTOR
Disconnect the leads from terminals described at following table. Connect an ohmmeter across the
timer motor winding, terminals are described at following table, and check that a reading of resistance
described at following table is indicated.
If this reading is not obtained then the timer is probably defective and should be replaced.
Disconnecting and checking terminals
5 and 6
Resistance of motor winding
approximately 11.3 kΩ
CARRY OUT 4R CHECKS after any of the above tests.
J
NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check between the
terminals as described in the following table.
NOISE FILTER
IN1
MEASURING POINT
INDICATION OF OHMMETER
Between IN1 and IN2
Approx. 180 kΩ
IN2
FUSE
13A
LINE CROSS CAPACITOR 0.22µ/ AC125V
VARISTOR 15G / 270 V
Between terminal N and WHITE Short circuit
DISCHARGE RESISTOR 180 kΩ/ 0.5 W
Between terminal L and RED Short circuit
NOISE SUPPRESSION COIL
If incorrect readings are obtained, replace the noise filter unit.
LINE BYPASS CAPACITOR
0.0022µ/AC250V
AC1
LINE BYPASS CAPACITOR
0.0022µ/AC250V
AC2
CARRY OUT 4R CHECKS.
K
HIGH VOLTAGE FUSE TEST
CARRY OUT 3D CHECKS.
If the high voltage fuse is blown, there could be a short in the high voltage rectifier or the magnetron.
Check them and replace the defective parts and the high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACEMENT.
12
R-210A
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions
below before operating the oven.
1. Disconnect oven from power supply.
2. Make sure that a definite” click” can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch 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.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1.
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.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
WARNING FOR WIRING
To prevent an electric shock, take the following
manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer
and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Switch lever, Open
button.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin
is locked. And make sure that the wire leads should
not come off even if the wire leads is pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
OUTER CASE REMOVAL
To remove the outer case proceed as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from rear and along the side edge
of case.
4. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
6. Discharge the H.V. capacitor before carrying out any
further work.
7. Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN COMPONENT OR WIRING.
POWER TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads (main wire harness and H.V.
fuse) from power transformer.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from magnetron.
4. Disconnect the wire leads from the noise filter.
5. Remove the one (1) screw holding the capacitor holder
to the oven cavity back plate.
6. Disconnect the filament lead of power transformer from
the magnetron.
7. Disconnect the lead of the power transformer from high
voltage capacitor.
8. Remove the two (2) screws holding the transformer to
bottom plate.
9. Remove the transformer.
13
R-210A
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)
9. Disconnect the H.V. fuse from high voltage capacitor.
10.Remove the HVC cover from the high voltage capacitor.
11.Now H.V. rectifier assembly, H.V. fuse and H.V. capacitor should be free.
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. fuse from the power transformer.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from the magnetron.
4. Disconnect the wire leads from the noise filter.
5. Remove one (1) screw holding capacitor holder to
oven cavity back plate.
6. Disconnect the filament lead of the power transformer
from the H.V. capacitor.
7. Remove one (1) screw holding earth side terminal of high
voltage rectifier assembly, and remove capacitor holder.
8. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS SECURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE
RECTIFIER. WHEN REPLACING IT, REPLACE HIGH VOLTAGE RECTIFIER ASSEMBLY.
MAGNETRON REPLACEMENT
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the magnetron.
3. Carefully remove the two (2) screws holding the
magnetron to the waveguide flange.
4. Lift up magnetron with care so that the magnetron
antenna is not hit by any metal object around antenna.
5. Now, the magnetron is free.
Re-install
1. Re-install the magnetron to the waveguide flange with
two (2) screws diagonally as shown in Figure C-1.
2. Re-connect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM".
3. Re-install the outer case and check that the oven is
operating properly.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
Screws
Magnetron
Wavegiude
Flange
Figure C-1. Magnetron Replacement
OVEN LAMP SOCKET REMOVAL
Oven lamp
socket
1. CARRY OUT 3D CHECKS.
2. 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.
3. Tear the cushion from the light mount plate.
4. Bend the tab of the light mount plate holding the oven.
5. Lift up the oven lamp socket.
6. Now, the oven lamp socket is free.
Terminal
Wire lead
Terminal hole
Flate type small
screw driver
Figure C-2. Oven lamp socket
POSITIVE LOCK® CONNECTOR REMOVAL
Terminal
1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock® connector.
3. Pull out the positive lock® connector.
Positive lock®
connector
1
Push
CAUTION: WHEN YOU (SERVICE ENGINEERS) CONNECT THE POSITIVE LOCK® CONNECTORS TO THE TERMINALS, CONNECT
THE POSITIVE LOCK® SO THAT THE LEVER FACE YOU (SERVICE ENGINEERS).
Lever
2
Pull down
Figure C-3 Positive lock® connector
14
R-210A
POWER SUPPLY CORD REPLACEMENT
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the power supply cord.
3. Remove the one (1) screw holding the power supply
cord to the oven cavity back plate.
4. Remove the power supply cord from the oven cavity
back plate.
Re-install
1. Insert the power supply cord into the oven cavity back plate.
2. Secure the one (1) screw holding the power supply
cord to the oven cavity back plate..
3. Connect the white and black wires of the main wire
harness into the terminal of the power supply cord,
referring to the Pictorial Diagram.
TURNTABLE MOTOR REPLACEMENT
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable and turntable support from the
oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor
cover to the bottom plate with the cutting pliers as
shown in Figure C-4.
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
5. Remove the turntable motor cover from the bottom
plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the single (1) screw holding the turntable
motor to the oven cavity.
8. Remove the turntable motor from the oven cavity.
Cutting pliers
9. Remove the O-ring and washer from the turntable
motor.
10.Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor
cover and the bottom plate with the cutting pliers.
2. Re-install the O-ring.
3. Apply the grease (Shinetsu silicone grease G-420 of
Sinetsu Chemical Co. Ltd. or Toray Silicone grease
SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the
base of the turntable motor shaft as shown in Figure C6.
4. Re-install the turntable motor with the O-ring and
washer to the oven cavity with the single (1) screw.
5. Re-connect the wire leads to the turntable motor.
6. Insert the tab of the turntable motor cover into the hole
of the bottom plate as shown in Figure C-4.
7. Re-install the turntable motor cover to the bottom plate
with one (1) screw XHTSD40P08RV0 or
XFPSD40P08K00 as shown in Figure C-4.
Screw: XHTSD40P08RV0
or
XFPSD40P08K00
Washer
Washer
Tab
Bridges
O-ring
Apply grease here
Hole
Turntable motor
cover
Base of turntable
motor shaft
Bottom plate
O-ring
Bridges
Turntable motor
Figure C-4. Turntable Motor Cover
Figure C-5. Washer and O-ring Installation and
Grease Applying.
FAN MOTOR REPLACEMENT
a pair of groove joint pliers.
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the one (1) screw holding the chassis support
to the oven cavity front plate.
4. Remove the chassis support .
5. Release the filament lead of the power transformer and
the H.V. wire from the fan duct.
6. Remove the one (1) screw holding the fan duct to the
waveguide flange.
7. Release the fan motor assembly from the oven cavity.
8. Remove the fan blade from the fan motor shaft according to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
CAUTION:
• Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan
motor. Because the rotor is easy to be shaven
by pliers and metal pieces may be produced.
• Do not touch the pliers to the coil of the fan
motor because the coil may be cut or injured.
• Do not transform the bracket by touching with
the pliers.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
3) Now, the fan blade will be free.
15
R-210A
CAUTION:
• Do not re-use the removed fan blade because
the hole (for shaft) may be lager
than normal.
9. Remove the two (2) screws holding the fan motor to
the fan duct.
10. Now, the fan motor is free.
3.
INSTALLATION
1.
2.
1)
2)
3)
Install the fan motor to the fan duct with the two (2)
screws.
Install the fan blade to the fan motor shaft according
the following procedure.
Hold the centre of the bracket which supports the
shaft of the fan motor on the flat table.
Apply the screw lock tight into the hole (for shaft) of the
fan blade.
Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight, ball
peen hammer or rubber mallet.
Rear View
4.
5.
6.
7.
8.
CAUTION:
• Do not hit the fan blade strongly when installed
because the bracket may be transformed.
• Make sure that the fan blade rotates smooth
after installed.
• Make sure that the axis of the shaft is not
slanted.
Install the fan motor assembly to the oven cavity by
fitting the holes of the fan duct into the tabs of the oven
cavity.
Re-install the fan duct to the waveguide flange with
the one (1) screw.
Insert the end of the chassis support into the slit of the
oven cavity rear cabinet.
Re-install the chassis support to the oven cavity front
plate with the one (1) screw.
Install the filament lead and the H.V. wire into the hole
of the fan duct .
Connect the wire leads to the fan motor, referring to
the pictorial diagram.
Shaft
Side View
Coil
Groove joint pliers
Table
Shaft
Axis
Stator
Gap
Bracket
Rotor
Center of
bracket
These are the areas
that should be held
with a pliers
Stator
Rotor
CONTROL PANEL ASSEMBLY AND SWITCH LEVER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the leads from the timer motor.
3. Remove the one (1) screw holding the chassis support
to the front plate of the oven cavity.
4. Remove the chassis support from the oven.
5. Lift up the control panel and release it from the oven cavity.
6. Now, the control panel assembly is free.
7. Open the door. Remove the switch lever from the front
plate of the oven cavity.
8. Now the switch lever is free.
1ST. LATCH SWITCH, 2 ND. LATCH SWITCH AND MONITOR SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from all switches.
3. Remove the control panel assembly and switch lever
from the oven cavity front flange. Referring to chapter
"CONTROL PANEL ASSEMBLY AND SWITCH LEVER REMOVAL"
4. Remove two (2) screws holding latch hook to oven
flange.
5. Remove latch hook assembly from oven flange.
6. Push outward on the two (2) retaining tabs holding
switch in place.
7. Switch is now free.
Re-install
1. Re-install each switch in its place. The 2nd. latch switch
2.
3.
4.
5.
6.
and monitor switch are in lower position. The 1st. latch
switch is in the upper position.
Re-connect wire leads to each switch. Refer to chapter
"Pictorial Diagram".
Secure latch hook (with two (2) mounting screws) to
oven flange.
Re-install the switch lever and the control panel assembly to the oven cavity front flange.
Re-connect wire leads to the timer motor. Refer to
chapter "Pictorial Diagram".
Make sure that monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure", and Adjustment Procedure
below.
1ST. LATCH SWITCH, 2ND. LATCH SWITCH AND MONITOR SWITCH ADJUSTMENT
following adjustment should be made.
1. Loosen the two (2) screws holding the latch hook to the
If the 1st. latch switch, 2nd. latch switch and monitor switch
do not operate properly due to a misadjustment, the
16
R-210A
flange of the oven front face.
2. With the door closed, adjust latch hook by moving it
back and forth and up and down. In and out play of the
door allowed by the upper and lower position of the
latch hook should be less than 0.5mm. The horizontal
position of the latch hook should be adjusted so that the
monitor switch is activated with the door closed. The
vertical position of the latch hook should be adjusted so
that the 1st. latch switch and the 2nd. latch switch are
activated with the door closed.
3. Secure the screws firmly.
4. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
After adjustment, make sure of the following.
1. In and out play of the door remains less than 0.5mm
when in the latched position. First check upper position
of latch hook, pushing and pulling upper portion of door
toward the oven face. Then check lower portion of the
latch hook, pushing and pulling lower portion of door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
2. The 1st. latch switch and 2nd. latch switch interrupt the
circuit before the door can be opened.
3. The monitor switch contacts close when the door is
opened.
4. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
LATCH HOOK
LATCH
HEADS
1ST. LATCH
SWITCH
MONITOR
SWITCH
DOOR
2ND. LATCH
SWITCH
SWITCH LEVER
Figure C-6. Latch Switch Adjustments
DOOR REPLACEMENT
REMOVAL
1. Disconnect oven from power supply.
2. Push the open button and open the door slightly.
3. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and corner portion of
door panel as shown in Figure C-7 to free engaging
parts.
4. Try the principles of the lever and lift up the choke cover
by inserting a putty knife in order shown in figure C-8.
5. Release choke cover from door panel.
6. Now choke cover is free.
7. Release two (2) pins of door panel from two (2) hole of
upper and lower oven hinges by lifting up.
8. Now, door panel is free from oven cavity.
9. Release door panel from ten (10) tabs of door frame
and remove door frame by sliding the door panel
downward.
10.Now, door panel with sealer film is free.
11.Tear sealer film from door panel.
12.Now, door panel is free.
13.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
14.Now, latch head and latch spring are free.
15.Remove door screen from door frame.
16.Now, door screen is free.
RE-INSTALL
1. Re-install door screen to door frame.
2. Re-install latch spring to the head. Re-install latch
spring to the door frame. Re-install latch head to the
door frame.
3. Re-install door panel to door frame by fitting ten (10)
tabs of door frame to ten (10) holes of door panel.
4. Put sealer film on door panel. Refer to "Sealer Film"
and figure C-9, on how to handle the new film.
5. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
6. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that 1st. latch switch, 2nd. latch switch
and monitor switch are operating properly. (Refer
to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave radiation emission limitation standards.
10
11
Choke Cover
12
9
8
1
7
3
6
2
5
4
Putty Knife
Door Frame
Figure C-7. Door Disassembly
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through centre of
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
Note:
17
The door on a microwave oven is designed to act
as an electronic seal preventing the leakage of
microwave energy from oven cavity during cook
cycle. This function does not require that door be
air-tight, moisture (condensation)-tight or lighttight. Therefore, occasional appearance of mois-
R-210A
ture, light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves indicate a leakage of microwave energy from oven cavity.
PIN
UPPER
OVEN HINGE
DOOR PANEL
CHOKE
COVER
LOWER
OVEN
HINGE
PIN
Figure C-8. Door Replacement
SEALER FILM
Installation
1. Put the adhesive tape on the backing film of the sealer
film as shown in Fig. C-9.
2. Tear the backing film by pulling the adhesive tape.
3. Put the pasted side of the sealer film on the door panel.
Sealer film
Backing film
Adhesive tape
Figure C-9. Sealer film
18
R-210A
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
19
2ND.
LATCH
SWITCH
IN1
20
Figure O-2 Oven Schematic-ON Condition
TTM
FM
OL
H.V.RECTIFIER
H.V.
CAPACITOR
0.86µ
AC2000V
H.V. FUSE
0.6A
MONITOR
SWITCH
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
TM
MAGNETRON
POWER
TRANSFORMER
AC2
NOISE
FILTER
1ST.
LATCH
SWITCH
TEMP.
FUSE
120˚C
(OVEN)
IN2
2ND.
LATCH
SWITCH
IN1
TTM
FM
OL
TM
H.V.RECTIFIER
H.V.
CAPACITOR
0.86µ
AC2000V
H.V. FUSE
0.6A
MONITOR
SWITCH
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
TIMER MOTOR
THERMAL
CUT-OUT
95˚C (MG)
FUSE
13A
MAGNETRON
POWER
TRANSFORMER
AC2
LINE BYPASS CAPACITOR
0.0022µ/AC250V
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 180 kΩ/ 0.5 W
VARISTOR 15G / 270 V
LINE BYPASS CAPACITOR
0.0022µ/AC250V
AC1
LIVE
LINE CROSS CAPACITOR 0.22µ/ AC125V
EARTH
NEUTRAL
110V ~ 60Hz
NOISE
FILTER
1ST.
LATCH
SWITCH
TEMP.
FUSE
120˚C
(OVEN)
IN2
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TIMER KNOB AT "0" POSITION.
TIMER MOTOR
THERMAL
CUT-OUT
95˚C (MG)
FUSE
13A
LINE BYPASS CAPACITOR
0.0022µ/AC250V
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 180 kΩ/ 0.5 W
VARISTOR 15G / 270 V
LINE BYPASS CAPACITOR
0.0022µ/AC250V
AC1
LIVE
LINE CROSS CAPACITOR 0.22µ/ AC125V
EARTH
NEUTRAL
110V ~ 60Hz
R-210A
NOTE: " " indicates components with potential above 250V.
Figure O-1 Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. VARIABLE COOKING CONTROL "HIGH"
3. TIMER ON
H
1
2
5
2
1
G W O O O R
R H R R R E
Y T G G G D
6
2ND LATCH
SWITCH
3
21
4
COM.
BLU
5
WHT
GRY
BLK
GRY
GRY
POWER TRANSFORMER
MAGNETRON
H.V. FUSE
H.V. RECTIFIER
HIGH VOLTAGE
CAPACITOR
4
5
Figure S-1. Pictorial Diagram
TURNTABLE MOTOR
RED
ORG
Cabinet
side
RED
WHT
HIGH VOLTAGE COMPONENTS
IN2
IN1
3
GRY
FAN MOTOR
ORG
RED
WHT
GRY
AC1
AC2
B
COM.
WHT
WHT
RED
RED
BLU
BLK
POWER SUPPLY
CORD 110V 60Hz
A
N.O.
N.C.
MONITOR
SWITCH
ORG
THERMALCUT-OUT
95˚C (MG)
BLU
2
+
BLK
RED
ORG
COM.
RED
E
ORG
NOTE:
Hot (RED) wire must
be connected to the
terminal with blue
mark on the oven light
socket.
WHT
C
N.O.
BLK
TEMP. FUSE
120˚C (OVEN)
BLU
1
NO
4
COM.
3
TIMER MOTOR
G
1ST LATCH
SWITCH
OVEN LAMP
AND SOCKET
D
RED
BLUE MARK
R-210A
6
A
B
C
F
6
D
E
F
G
H
R-210A
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY
CODE
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BD
AK
AK
AQ
AG
AQ
AV
AX
BN
AE
AS
BS
AL
AK
AT
AD
AK
1
1
2
AX
AS
AB
1
1
1
1
1
AW
AF
AF
AF
AB
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AQ
AV
AC
AM
AL
AK
BL
AK
AQ
AL
AM
AB
AE
AG
AP
AG
AB
AE
AG
AD
1
1
1
1
1
1
4
1
AT
AY
AS
AG
AB
AE
AA
AK
1
1
1
1
1
1
1
1
1
AQ
AM
AT
AX
AD
AC
AC
AE
AF
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
1-15-1
1-16
QSWTEA126WRE0
QSW-MA110WRE0
QSW-MA111WRE0
QACCJA058WRE0
QSOCLA021WRE0
FH-DZA047WRK0
RC-QZA200WRE0
RMOTEA366WRE0
RV-MZA198WRE0
RLMPTA030WRE0
RMOTDA211WRE0
RTRN-A550WRE0
RTHM-A079WRE0
QFS-TA038WRE0
FPWBFA280WRK0
QFS-GA041WRE0
QFS-IA004WRE0
Timer motor 30min.
1st. latch switch & 2nd. latch switch
Monitor switch
Power supply cord
Oven lamp socket
High voltage rectifier
High voltage capacitor
Fan motor
Magnetron
Oven lamp
Turntable motor
Power transformer
Thermal cut-out 95˚C
Temperature fuse 120˚C
Noise filter
Fuse 13A
H.V. fuse 0.6A
2- 1
2- 2
2- 3
GCABUA602WRP0
GDAI-A269WRP0
GLEGPA023WRE0
Outer case cabinet
Bottom plate
Foot
33333-
HPNLCB393WRR0
JBTN-B071WRF0
JKNBKA578WRF0
JKNBKA579WRF0
MSPRCA050WRE0
Control panel
Open button
Timer knob
Vari knob
Open button spring
CABINET PARTS
CONTROL PANEL PARTS
1
2
3
4
5
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
PHOK-A086WRF0
LANGQA470WRW0
PCUSUA194WRP0
LBNDKA095WRP0
NFANJA029WRE0
PDUC-A623WRP0
FOVN-A411WRT0
GLEGPA062WRF0
LANGTA318WRP0
MLEVPA206WRF0
PCOVPA276WRE0
PCUSUA461WRP0
PCUSUA443WRP0
PCOVPA334WRE0
LANG-A061WRP0
PPACGA097WRE0
PCUSGA312WRP0
PCUSUA235WRP0
PCUSUA270WRP0
PCUSUA197WRP0
Latch hook
Light mount plate
Cushion
Capacitor holder
Fan blade
Fan duct
Oven cavity
Leg
Chassis support
Switch lever
Waveguide cover
Cushion
Cushion
HVC cover
Air guide
O-ring
Cushion
Cushion
Cushion
Cushion
∆ 5- 1
∆ 5- 2
5- 3
∆ 5- 4
5- 5
5- 6
5- 7
5- 8
FDORFA296WRT0
GWAKPA516WRF0
HPNL-A669WRR0
LSTPPA154WRF0
MSPRTA084WRE0
PSHEPA333WRE0
XCPSD40P06000
GCOVHA377WRF0
Door panel
Door frame
Door screen
Latch head
Latch spring
Sealer film
Screw : 4mm x 6mm
Choke cover
DOOR PARTS
MISCELLANEOUS
666666666-
1
2
3
4
5
6
7
8
9
FROLPA046WRK0
NTNT-A034WRF0
TINS-A634WRR0
FW-VZB647WRE0
TSPCNC539WRR0
TCAUHA214WRR0
LHLDWA056WRE0
QW-VZA126WRE0
TLABMA558WRR0
Turntable support
Turntable
Operation manual
Main wire harness
Rating label
K caution label
Cable clip
Earth wire
Menu label
22
R-210A
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
6-10
PART NO.
TLABPA032WRR0
Grounding label
DESCRIPTION
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
XEPSD30P08XS0
XFPSD40P08K00
LX-EZA042WRE0
LX-WZA028WRE0
XHTSD40P08RV0
XFPSD30P06000
XOTSD40P12RV0
XOTSD40P12000
XOTSE40P08000
XBPBW40P10000
XHTSD40P12RV0
XNEBW40-32000
XWVSD40-05000
Screw : 3 mm x 8mm
Screw : 4mm x 8mm
Special screw
Special washer
Screw : 4mm x 8mm
Screw : 3mm x 6mm
Screw : 4mm x 12mm
Screw : 4mm x 12mm
Screw : 4mm x 8mm
Screw : 4mm x 10mm
Screw : 4mm x 12mm
Nut : 4mm x 3.2mm
Washer : 4mm x 0.5mm
Q'TY
1
CODE
AG
1
8
2
1
2
1
11
3
4
1
1
2
1
AA
AA
AB
AB
AA
AA
AA
AA
AA
AB
AA
AA
AA
SCREWS,NUTS AND WASHERS
HOW TO ORDER REPLACEMENT PARTS
To have your order filled prompty and correctly, please furnish the following information.
1. MODEL NUMBER
3. PART NO.
2. REF. NO.
4. DESCRIPTION
INFORMATION FOR PARTS CHANGE
The foot will be changed as follows, and new parts will be used for products from serial number 9712xxxxx.
↔
Interchangeability
NEW
A. OLD
REF.NO.
2- 3
B. OLD
C. OLD
← NEW
REPLACEMENT PART NO.
OLD No.
Q'ty
NEW No.
DESCRIPTION
Foot
→ NEW
GLEGPA023WRE0
2 GLEGPA074WRE0
D. OLD
NEW
Interchange- EFFECTIVE
Q'ty ability
FROM
CODE
2
A
DEC/ '97
AC
TOP PAD ASSEMBLY
PACKING AND ACCESSORIES
FPADBA332WRK0
POLYETHYLENG BAG
SSAKHA014WRE0
TURNTABLE TRAY
OPERATION MANUAL
MICROWAVE OVEN
BOTTOM PAD ASSEMBLY
FPADBA333WRK0
TURNTABLE SUPPORT
INTO THE
OVEN CAVITY
Not replaceable items.
TRAY PAD ASSY
(CPADBA172WRK0)
23
PACKING CASE
SPAKCC999WRE0
R-210A
2
1
4
3
6
5
7-7
A
OVEN AND CABINET PARTS
A
7-7
7-7
2-1
4-19
1-5
7-9
1-10
B
7-8
7-2
7-6
7-7
B
7-2
1-13
4-2
1-9
4-12
4-15
1-14
C
7-9
4-3
C
6-6
6-5
4-13
6-10
4-5
7-2
7-8
7-12
4-6
6-8
7-5
4-7
D
D
1-8
1-4
4-20
4-14
7-11
6-2
1-6
7-7
4-11
1-7
1-16
7-4
7-13
7-10
4-16
E
7-2
7-2
7-2
4-17
4-1
1-2
4-4
6-7
1-11
E
1-15-1
1-15
1-3
4-10
1-2
6-1
7-3
2-2
1-12
F
F
4-9
4-18
7-8
7-7
G
G
7-7
2-3
7-7
2-3
4-8
7-7
H
1
2
4
3
24
H
5
6
R-210A
2
1
4
3
6
5
CONTROL PANEL PARTS
3-4
A
A
1-1
7-1
B
B
3-3
3-1
C
C
3-2
5-8
3-5
5-6
5-7
5-1
D
D
DOOR PARTS
5-2
5-7
E
E
5-3
5-7
F
F
5-4
5-5
G
G
MISCELLANEOUS
6-9
6-4
H
H
Actual wire harness may be different than illustration.
1
2
4
3
25
5
6
R-210A
'97SHARP CORP. (11K0.100E) Printed in Japan
26
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