R-630DK R-630DW R-630DS SERVICE MANUAL

R - 630DK
R -630 DW
R - 630 DS
SERVICE MANUAL
S7017R630DPW/
MICROWAVE OVEN
MODELS
Breakfast Linch
on One Dish
Bar
the Run Dinners Popcorn Baked
Sensor
Potatoes Reheat Custom
More from your Microwave
Help
Sensor Cooking
Super
Compu
Defrost Defrost Beverage Vegetables Main
Frozen
center
Kitchen
Entrees
Foods Timer/Clock
1
2
3
4
5
Power
Level
Minute
PLus
6
7
8
9
0
STOP
Clear
START
Touch on
R-630DK
R-630DW
R-630DS
In the interest of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVER
BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................ 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLESHOOTING GUIDE ............................................................................................................................ 10
TEST PROCEDURE ............................................................................................................................................ 12
TOUCH CONTROL PANEL ................................................................................................................................. 20
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 25
PICTORIAL DIAGRAM ........................................................................................................................................ 32
POWER UNIT CIRCUIT ...................................................................................................................................... 33
CPU UNIT CIRCUIT ............................................................................................................................................ 34
PRINTED WIRING BOARD ................................................................................................................................. 36
PARTS LIST ........................................................................................................................................................ 37
PACKING AND ACCESSORIES ......................................................................................................................... 39
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R -630DK
R-630DW
R -630DS
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3)
seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and
latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures described
in this manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS
CORPORATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven
and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's
Center for Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found
with emissions in excess of 4mW/cm 2. The owner of the unit should be instructed not to use the unit
until the oven has been brought into compliance.
R -630DK
R-630DW
R -630DS
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with
following parts may result in a severe, possibly
fatal, electrical shock.
(Example)
High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
Don't Touch !
Danger High Voltage
When the testing is completed,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is
installed.
7. Run the oven and check all functions.
Before Servicing
1. Disconnect the power supply cord
remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
, and then
WARNING: RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
After repairing
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the highvoltage capacitor (that is the connecting lead of the highvoltage rectifier) against the chassis with the use of an
insulated screwdriver.
1. Reconnect all leads removed from components during
testing.
2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer case is
installed.
4. Run the oven and check all functions.
Whenever troubleshooting is performed the power supply
must be disconnected. It may, in some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water
remains cold, carry out Before Servicing procedure and reexamine the connections to the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and a microwave leakage test should be carried out.
1
R- 630DK
R-630DW
R -630 DS
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven
should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition
by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external
surface of the oven.
2) Safety interlock switches Primary interlock relay and door sensing switch shall prevent microwave radiation emission in
excess of the requirement as above mentioned, secondary interlock switch shall prevent microwave radiation emission
in excess of 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5˚C (68˚F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive 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.
4) Set the cooking control on Full Power Cooking Mode.
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement)
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal
has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed
latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the secondary interlock switch does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
2
R -630DK
R-630DW
R -630DS
SERVICE MANUAL
PRODUCT DESCRIPTION
MICROWAVE OVEN
R-630DK/ R-630DW/ R-630DS
GENERAL INFORMATION
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the
SHARP MICROWAVE OVEN, R-630DK, R-630DW, R-630DS.
It is recommended that service personnel carefully study the entire
text of this manual so that they will be qualified to render satisfactory
customer service.
Check the interlock switches and the door seal carefully. Special
attention should be given to avoid electrical shock and microwave
radiation hazard.
OPERATION
TROUBLESHOOTING GUIDE AND
TEST PROCEDURE
TOUCH CONTROL PANEL
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 no other visible damage with the oven.
Servicing and repair work must be carried out only by trained service
personnel.
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
DANGER
Certain initial parts are intentionally not grounded and present
a risk of electrical shock only during servicing. Service
personnel - Do not contact the following parts while the
appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron, High
Voltage Rectifier Assembly, High Voltage Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
All the parts marked “*” on parts list are used at voltages more than
250V.
Removal of the outer wrap gives access to voltage 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 ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
3
PARTS LIST
R- 630DK
R-630DW
R -630 DS
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
120 Volts / 14 Amperes
60 Hertz
Single phase, 3 wire grounded
Power Output
1100 watts (IEC TEST PROCEDURE)
Operating frequency of 2450MHz
Width 19-1/2"
Height 14"
Depth 20-5/8"
Width 17-3/4"
Height 8-1/4"
Depth 17"
Case Dimensions
Cooking Cavity Dimensions
1.4 Cubic Feet
Control Complement
Touch Control System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI .................................................. Full power throughout the cooking time
P-90 .................................................................... approx. 90% of Full Power
P-80 .................................................................... approx. 80% of Full Power
P-70 .................................................................... approx. 70% of Full Power
P-60 .................................................................... approx. 60% of Full Power
P-50 .................................................................... approx. 50% of Full Power
P-40 .................................................................... approx. 40% of Full Power
P-30 .................................................................... approx. 30% of Full Power
P-20 .................................................................... approx. 20% of Full Power
P-10 .................................................................... approx. 10% of Full Power
P-0 .................................................... No power throughout the cooking time
Breakfast Bar pad, Lunch on the Run pad, One Dish Dinners pad
Super Defrost pad, Compu Defrost pad, Beverage Center pad
Sensor Cooking pads, Custom Help pad, Kitchen Timer/Clock pad
Number selection pads, Power Level pad, Minute Plus pad
STOP/Clear pad, START/Touch On pad
Oven Cavity Light
Yes
Safety Standard
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed
and grounded in accordance with the National Electrical Code and local codes and ordinances.
In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the
electric current.
WARNING: Improper use of the grounding plug can result in a risk of electric shock.
Electrical Requirements
The electrical requirements are a 120 volt 60 Hz, AC only,
15 or 20 amp. fused electrical supply. It is recommended that a separate circuit serving only this appliance be provided. When
installing this appliance, observe all applicable codes and ordinances.
A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord.
4
R -630DK
R-630DW
R -630DS
Where a two-pronged wall-receptacle is encountered, it is the personal
responsibility and obligation of the customer to contact a qualified
electrician and have it replaced with a properly grounded three-pronged
wall receptacle or have a grounding adapter properly grounded and
polarized. If the extension cord must be used, it should be a 3-wire, 15
amp. or higher rated cord. Do not drape over a countertop or table where
it can be pulled on by children or tripped over accidentally.
3-Pronged Plug
Grounded
Receptacle Box
Grounding Pin
CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS
PLUG.
3-Pronged Receptacle
OVEN DIAGRAM
1. Door handle
Pull to open door.
2. Auto-Touch control panel
3. Display: 99 minutes, 99 seconds
4. Oven door with see-through window
5. Safety door latches
The oven will not operate unless the
door is securely closed.
6. Door hinges
7. Door seals and sealing surface
8. Turntable motor shaft
9. Removable turntable support
Carefully place the turntable support
in the center of the oven floor.
10. Removable turntable
Place the turntable on the turntable
support cecurely. The turntable will
rotate clockwise or counterclockwise.
Only remove for cleaning.
11. Ventilation openings (Rear)
12. Oven light
It will light when oven is operating or
door is opened.
13. Wave guide cover: DO NOT REMOVE.
2
Breakfast Linch
on One Dish
Bar
the Run Dinners Popcorn Baked
Sensor
Potatoes Reheat Custom
More from your Microwave
Help
Sensor Cooking
Super
Compu
Defrost Defrost Beverage Vegetables Main
Frozen
center
Kitchen
Entrees
Foods Timer/Clock
3
1
2
3
4
5
Power
Level
Minute
PLus
6
7
8
9
0
STOP
Clear
START
Touch on
7
11
12
,,,,,
,
,,,,,
,
,
,,
6
1
8
5 4
9
,
,
,
,
,
13 5
10
TOUCH CONTROL PANEL
See note
Breakfast Linch on One Dish Popcorn Baked
Bar
the Run Dinners
Potatoes
More from your Microwave
Super
Defrost
Compu
Defrost
Sensor
Reheat
See note
Custom
Help
1
2
3
4
5
Power
Level
Minute
PLus
6
7
8
9
0
STOP
Clear
START
Touch on
Sensor Cooking
Beverage Vegetables Main
center
Entrees
Frozen
Kitchen
Foods Timer/Clock
See note
NOTE:
The directed features are disabled after three minutes when the oven is not in use. These features are
automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed.
5
R- 630DK
R-630DW
R -630 DS
OPERATION
DESCRIPTION OF OPERATING SEQUENCE
(1) When the door opens from the closed position, the primary
interlock relay (RY2) and secondary interlock switch open
their contacts. And contacts of the relay (RY1) remains
closed. Then the monitor switch contacts close.
(2) When the door is closed from the open position, the
monitor switch contacts open first. Then the contacts of
the secondary interlock switch and door sensing switch
close. And contacts of the relay (RY1) open.
If the secondary interlock switch and primary interlock relay
(RY2) fail with the contacts closed when the door is opened,
the closing of the monitor switch contacts will form a short
circuit through the monitor fuse, secondary interlock switch,
relay (RY1) and primary interlock relay (RY2), causing the
monitor fuse to blow.
The following is a description of component functions during
oven operation.
OFF CONDITION
Closing the door activates the door sensing switch and
secondary interlock switch. (In this condition, the monitor
switch contacts are opened.)
When oven is plugged in, 120 volts A.C. is supplied to the
control unit (Figure O-1).
1. The display will show "SHARP SIMPLY THE BEST
PRESS CLEAR AND PRESS CLOCK".To set any
program or set the clock, you must first touch the STOP/
CLEAR pad. The display will clear, and " : " will appear.
COOKING CONDITION
POWER LEVEL 0 PERCENT TO 90 PERCENT
COOKING
Program desired cooking time by touching the NUMBER
pads. Program the power level by touching the POWER
LEVEL pad and then a Number pad.
When the START pad is touched, the following operations
occur:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(For details, refer to Figure O-2)
RELAY
RY-1
RY-2
When Variable Cooking Power is programmed, the 120
volts A.C. is supplied to the power transformer intermittently
through the contacts of relay (RY-2) which is operated by
the control unit within a 32 second time base. Microwave
power operation is as follows:
VARI-MODE
100 PERCENT
90 PERCENT
80 PERCENT
70 PERCENT
60 PERCENT
50 PERCENT
40 PERCENT
30 PERCENT
20 PERCENT
10 PERCENT
0 PERCENT
CONNECTED COMPONENTS
oven lamp/turntable motor/fan motor
power transformer
2. 120 volts A.C. is supplied to the primary winding of the
power transformer and is converted to about 3.3 volts
A.C. output on the filament winding, and approximately
2400 volts A.C. on the high voltage winding.
3. The filament winding voltage heats the magnetron
filament and the H.V. winding voltage is sent to a voltage
doubler circuit.
4. The microwave energy produced by the magnetron is
channelled through the waveguide into the cavity feedbox, and then into the cavity where the food is placed to
be cooked.
5. Upon completion of the cooking time, the power
transformer, oven lamp, etc. are turned off, and the
generation of microwave energy is stopped. The oven
will revert to the OFF condition.
6. When the door is opened during a cook cycle, the
monitor switch, door sensing switch, secondary interlock
switch, relay (RY1) and primary interlock relay are
activated with the following results. The circuits to the
turntable motor, the cooling fan motor, and the high
voltage components are de-energized, the oven lamp
remains on, and the digital read-out displays the time still
remaining in the cook cycle when the door was opened.
7. The monitor switch electrically monitors the operation of
the secondary interlock switch and primary interlock
relay and is mechanically associated with the door so
that it will function in the following sequence.
Note:
ON TIME
32 sec.
30 sec.
26 sec.
24 sec.
22 sec.
18 sec.
16 sec.
12 sec.
8 sec.
6 sec.
0 sec.
OFF TIME
0 sec.
2 sec.
6 sec.
8 sec.
10 sec.
14 sec.
16 sec.
20 sec.
24 sec.
26 sec.
32 sec.
The ON/OFF time ratio does not correspond with
the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
SENSOR COOKING CONDITION
Using the SENSOR function, the food is cooked without
figuring time, power level or quantity. When the oven senses
enough steam from the food, it relays the information to its
microprocessor which will calculate the remaining cooking
time and power level needed for best results. When the food
is cooked, water vapor is developed. The sensor “senses”
the vapor and its resistance increases gradually. When the
resistance reaches the value set according to the menu,
supplementary cooking is started. The time of supplementary cooking is determined by experiment with each food
category and inputted into the LSI.
6
R -630DK
R-630DW
R -630DS
An example of how sensor works: (POTATOES)
1. Potates at room temperature. Vapor is emitted very
slowly.
MIC
RO
WA
VE
2. Heat Potates. Moisture and humidity is emitted rapidly.
You can smell the aroma as it cooks.
AH SENSOR
MIC
RO
WA
VE
3. Sensor detects moisture and humidity and calculates
cooking time and variable power.
Cooking Sequence.
1. Operate the oven in sensor cooking mode by referring to
the operation manual.
NOTE: The oven should not be operated on SENSOR
immediately after plugging in the unit. Wait two
minutes before cooking on SENSOR.
2. The coil of shut-off relay (RY-1) is energized, the turntable
motor, oven lamp and cooling fan motor are turned on,
but the power transformer is not turned on.
3. After about 16 seconds, the cook relay (RY-2) is
energized. The power transformer is turned on,
microwave energy is produced and first stage is started.
The 16 seconds is the cooling time required to remove
any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door or touch
STOP/CLEAR pad.
4. When the sensor detects the vapor emitted from the
food, the display switches over to the remaining cooking
time and the timer counts down to zero.
At this time, the door may be opened to stir, turn, or
season food.
5. When the timer reaches zero, an audible signal sounds.
The shut-off relay and cook relay are de-energized and
the power transformer, oven lamp, etc. are turned off.
6. Opening the door or touching the STOP/CLEAR pad, the
time of day will reappear on the display and the oven will
revert to an OFF condition.
7
R- 630DK
R-630DW
R -630 DS
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY
MONITOR
FUSE 20A
THERMAL
CUT-OUT (OVEN)
THERMAL
CUT-OUT (MG.)
N.O.
POWER
TRANSFORMER
N.O.
F3
A2
CAPACITOR 0.94µF
AC 2200V
F2
F1
PRIMARY
INTERLOCK
RELAY
AH SENSOR
(RY-2)
(RY-1)
A1
CONTROL UNIT
COM.
COM.
B2
GRN
120V AC
60 Hz
B1
DOOR
SENSING
SWITCH
OL
OVEN
LAMP
TTM
MONITOR
SWITCH
FM
RECTIFIER
MAGNETRON
SECONDARY
INTERLOCK
SWITCH
TURNTABLE
MOTOR
FAN
MOTOR
Figure O-1. Oven Schematic-Off Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. COOKING TIME PROGRAMMED
3. VARIABLE COOKING CONTROL "P-HI" (100%)
4. "START" PAD TOUCHED
MONITOR
FUSE 20A
THERMAL
CUT-OUT (OVEN)
THERMAL
CUT-OUT (MG.)
N.O..
POWER
TRANSFORMER
N.O.
F2
F1
PRIMARY
INTERLOCK
RELAY
AH SENSOR
(RY-2)
(RY-1)
A1
CONTROL UNIT
COM.
COM
B2
GRN
120V AC
60 Hz
B1
DOOR
SENSING
SWITCH
OL
OVEN
LAMP
TTM
CAPACITOR 0.94µF
AC 2200V
F3
A2
MONITOR
SWITCH
FM
RECTIFIER
MAGNETRON
SECONDARY
INTERLOCK
SWITCH
TURNTABLE
MOTOR
FAN
MOTOR
Figure O-2. Oven Schematic-Cooking Condition
8
R -630DK
R-630DW
R -630DS
DESCRIPTION AND FUNCTION OF COMPONENTS
DOOR OPEN MECHANISM
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH,
PRIMARY INTERLOCK RELAY (RY2), RELAY
(RY1), SECONDARY INTERLOCK SWITCH
AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE").
NOTE: MONITOR FUSE AND MONITOR SWITCH ARE
REPLACED AS AN ASSEMBLY.
The door is opened by pulling the door. Refer to the Figure
D-1.
Latch Hook
Door
Latch
Heads
Door Sensing
Switch
TURNTABLE MOTOR
The turntable motor rotates the turntable located on the
bottom of the oven cavity, so that the foods on the turntable
cook evenly during cooking. The turntable may turn in either
direction.
Monitor Switch
Secondary
Interlock Switch
COOLING FAN MOTOR
The cooling fan motor drives a blade which draws external
cool air. This cool air is directed through the air vanes
surrounding the magnetron and cools the magnetron. This
air is channelled through the oven cavity to remove steam
and vapors given off from the heating foods. It is then
exhausted through the exhausting air vents at the oven
cavity.
Figure D-1. Door Open Mechanism
DOOR SENSING AND SECONDARY INTERLOCK
SWITCHES
The secondary interlock switch is mounted in the lower
position of the latch hook and the door sensing switch in the
primary interlock system is mounted in the upper position of
the latch hook. They are activated by the latch heads on the
door. When the door is opened, the switches interrupt the
power to all high voltage components. A cook cycle cannot
take place until the door is firmly closed thereby activating
both interlock switches. The primary interlock system consists of the door sensing switch and primary interlock relay
located on the control circuit board.
MONITOR FUSE
1. The monitor fuse blows when the contacts (COM-NO) of
the primary interlock relay (RY2) and secondary interlock
switch remain closed with the oven door open and when
the monitor switch closes.
2. If the wire harness or electrical components are shortcircuited, this monitor fuse blows to prevent an electric
shock or fire hazard.
MONITOR SWITCH
OVEN THERMAL CUT-OUT
The monitor switch is activated (the contacts opened) by the
latch head on the door while the door is closed. The switch
is intended to render the oven inoperative, by means of
blowing the monitor fuse, when the contacts of the primary
interlock relay (RY2) and secondary interlock switch fail to
open when the door is opened.
The thermal cut-out, located on the top of the oven cavity, is
designed to prevent damage to the oven by fire. If the food
load is overcooked, by either error in cook time or defect in
the control unit, the thermal cut-out will open.
Under normal operation, the oven thermal cut-out remains
closed. However, when abnormally high temperatures are
reached within the oven cavity, the oven thermal cut-out will
open at 257˚F(125˚C), causing the oven to shut down.
Functions:
1. When the door is opened, the monitor switch contact
close (to the ON condition) due to their being normally
closed. At this time the primary interlock relay (RY2) and
secondary interlock switch are 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 first opened and then the door sensing
switch and the secondary interlock switch contacts close.
(On opening the door, each of these switches operate
inversely.)
3. If the door is opened, and the primary interlock relay
(RY2) and secondary interlock switch contacts fail to
open, the monitor fuse blows simultaneously with closing
of the monitor switch contacts.
MAGNETRON THERMAL CUT-OUT
The thermal cut-out located near the magnetron 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
257˚F(125˚C) causing the oven to shut down.
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TROUBLESHOOTING GUIDE
Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.
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 monitor fuse, check the monitor switch, relay (RY1)
primary interlock relay (RY2), door sensing switch and secondary interlock switch before replacing the
monitor fuse. If the monitor fuse is replaced, the monitor switch must also be replaced. Use part FFSBA023WRK0 as an assembly.
IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may, in some cases,
be necessary to connect the power supply cord after the outer case has been removed, in this event,
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect all leads removed from components during testing.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is installed.
7. Run the oven and check all functions.
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CK = Check / RE = Replace
Home fuse or circuit breaker blows
when power cord is plugged into wall
receptacle
Monitor fuse blows when power cord
is plugged into wall receptacle.
OFF
CONDITION
All letters and indicators do not appear in display when power cord is
first plugged into wall outlet.
Display does not operate properly
when STOP/CLEAR key is touched.
(Buzzer should sound and ":" or time
of day should appear in display.)
Oven lamp does not light when door
is opened.
Oven lamp does not go out when
door is closed.
Oven lamp lights but fan motor and
turntable motor do not operate.
Oven does not go into cook cycle
when START pad is touched
Oven seems to be operating but little
or no heat is produced in oven load.
(Food incompletely cooked or not
cooked at all at end of cook cycle.)
Oven goes into a cook cycle but extremely uneven heating is produced
in oven load (food).
Oven does not cook properly when
programmed for Cooking Power P50 mode. (Operates properly on Cooking Power P-HI (100%) mode.)
Oven goes into COMPU DEFROST
but food is not defrosted well.
SENSOR
COOKING
CONDITION
AH sensor does not end during sensor cooking condition. (Oven does
not shut off after a cup of water is
boiling by sensor cooking.)
Oven stops at 16 sec. after setting.
11
AH SENSOR
FOIL PATTERN ON PWB.
COMPU DEFROST
K L M N
RELAY (RY1)
KEY UNIT
DIRTY OVEN CAVITY
LOW VOLTAGE
WRONG OPERATION
CONTROL UNIT
TURNTABLE MOTOR
COOLING FAN MOTOR
OVEN LAMP OR SOCKET
MONITOR FUSE
MONITOR SWITCH
SECONDARY INTERLOCK SWITCH
PRIMARY INTERLOCK SYSTEM
THERMAL CUT-OUT
HIGH VOLTAGE CAPACITOR
H.V. RECTIFIER ASSEMBLY
POWER TRANSFORMER
MAGNETRON
PROBLEM
SHORT OR OPENED WIRING
CONDITION
RE RE A B C D E F F G H RE RE CK I CK CK CK J
SHORT IN POWER CORD
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
R- 630DK
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TEST PROCEDURES
PROCEDURE
LETTER
A
COMPONENT TEST
MAGNETRON ASSEMBLY TEST
1.
2.
3.
4.
5.
6.
7.
8.
9.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge the high voltage capacitor.
To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check
across the magnetron filament leads should indicate less than 1 ohm.
To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads
and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance
the magnetron is grounded and must be replaced.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
MICROWAVE OUTPUT POWER
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted).
HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD
BE OBSERVED.
Power output of the magnetron can be measured by performing a water temperature rise test. This test
should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following
components or wiring: silicon rectifier, high voltage capacitor and power transformer. This test will require
a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple type
temperature tester. For accurate results, the following procedure must be followed carefully:
1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water with
a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through
the water until the temperature stabilizes. Record the temperature of the water.
2. Place the cup of water in the oven. Operate oven at POWER P-HI(HIGH) selecting more than 60
seconds cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand
of a watch or the digital read-out countdown.
3. Remove the cup from the oven and again measure the temperature, making sure to stir the
thermometer or thermocouple through the water until the maximum temperature is recorded.
4. Subtract the cold water temperature from the hot water temperature. The normal result should be 32.1
to 59.7˚F(17.9 to 33.2˚C) rise in temperature. If the water temperatures are accurately measured and
tested for the required time period the test results will indicate if the magnetron tube has low power
output (low rise in water temperature) which would extend cooking time or high power output (high
rise in water temperature) which would reduce cooking time. Because cooking time can be adjusted
to compensate for power output, the magnetron tube assembly should be replaced only if the water
temperature rise test indicates a power output well beyond the normal limits. The test is only accurate
if the power supply line voltage is 120 volts and the oven cavity is clean.
B
POWER TRANSFORMER TEST
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge the high voltage capacitor.
Disconnect the primary input terminals and measure the resistance of the transformer with an
ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance of
the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be
approximately 75 ohms; the resistance of the filament coil should be less than 1 ohm.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C
HIGH VOLTAGE RECTIFIER TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge the high voltage capacitor.
Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance
across the terminals and observe, reverse the leads to the rectifier terminals and observe meter
reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions,
the rectifier is probably defective and should be replaced.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
D
HIGH VOLTAGE CAPACITOR TEST
1.
2.
3.
4.
5.
6.
7.
8.
E
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge the high voltage capacitor.
If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads
and check for short or open between the terminals using an ohmmeter.
Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate
continuity for a short time and should indicate an open circuit once the capacitor is charged. If the
above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of
the terminals and case. If it is shorted, replace the capacitor.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
OVEN THERMAL CUT-OUT TEST
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperature of the thermal cut-out reaches approximately 257˚F(125˚C).
An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out and
check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check
for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
MAGNETRON THERMAL CUT-OUT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
4. A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperature of the magnetron reaches approximately 257˚F(125˚C). An open thermal cut-out
indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the
cooling fan air guide.
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,
REPLACE THERMAL CUT-OUT.
F
SECONDARY INTERLOCK SWITCH TEST
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the secondary interlock switch.
Reconnect all leads removed from components during testing.
Reinstall the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
PRIMARY INTERLOCK SYSTEM TEST
DOOR SENSING SWITCH
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the door sensing switch.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE: If the door sensing switch contacts fail in the open position and the door is closed, the cooling
fan, turntable and oven light will be activated by RY1.
PRIMARY INTERLOCK RELAY (RY2)
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
4. Disconnect two (2) wire leads from the male tab terminals of the Primary Interlock Relay. Check the
state of the relay contacts using a ohmmeter. The relay contacts should be open. If the relay contacts
are closed, replace the circuit board entirely or the relay itself.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
G
MONITOR SWITCH TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Before performing this test, make sure that the secondary interlock switch and the primary interlock
relay are operating properly, according to the above Switch Test Procedure. Disconnect the wire lead
from the monitor switch (COM) terminal. Check the monitor switch operation by using the ohmmeter
as follows. When the door is open, the meter should indicate a closed circuit. When the monitor switch
14
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
5.
6.
7.
8.
actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity
with the door opened (in this condition the plunger of the monitor switch is pushed in), the meter should
indicate an open circuit. If improper operation is indicated, the switch may be defective. After testing
the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal and check the
continuity of the monitor circuit.
Reconnect all leads removed from
WHT
components during testing.
RED
Reinstall the outer case (cabinet).
Reconnect the power supply cord
after the outer case is installed.
Screw Driver
Run the oven and check all
Monitor Switch
functions.
Secondary
Ohmmeter
Interlock Switch
H
BLOWN MONITOR FUSE TEST
1.
2.
3.
4.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
If the monitor fuse is blown when the door is opened, check the primary interlock relay, secondary
interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before
replacing the blown monitor fuse.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE PRIMARY INTERLOCK
RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR
SWITCH FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA023WRK0, even
if the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised
of a 20 ampere fuse and switch.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
I
CONTROL TEST
The control unit consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike
conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and
ohmmeter. In this service manual, the control panel unit is divided into three units, CPU Unit, Key Unit and
Power Unit, and troubleshooting by unit replacement is described according to the symptoms indicated.
Before testing,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) To discharge high voltage capacitor, wait for 60 seconds.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
1. Key Unit.
The following symptoms indicate a defective key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the Key unit is defective, replace the door screen assembly.
2. Control Unit
The following symptoms indicate a defective control unit. Before replacing the control unit, perform
the Key unit test (Procedure J) to determine if control unit is faulty.
15
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
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) Clock does not operate properly.
c) Cooking is not possible.
When testing and/or replacement is completed,
1) Disconnect the power supply cord, and then remove outer case.
2) To discharge the high voltage capacitor, wait for 60 seconds.
3) Re-install all removed parts.
4) Reconnect all leads removed from components during testing.
5) Re-install the outer case (cabinet).
6) Reconnect the power supply cord after the outer case is installed.
7) Run the oven and check all functions.
J
KEY UNIT TEST
G12 G11 G10 G 9
1. Disconnect the power supply cord, and then remove outer case.
2. To discharge the high voltage capacitor, wait for 60 seconds.
3. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
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 door sensing switch
connecter). Use the Key unit matrix indicated on the control panel schematic and place a jumper wire
between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control
unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does
not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method
may be used (after clearing the control unit) to determine if the control unit or key pad is at fault.
4. Reconnect all leads removed from components during testing.
5. Re-install the outer case
G8
G7
G6
G5
G4
G3
G2
G1
(cabinet).
6. Reconnect the power
Power
Minute
1
2
3
4
5
Level
Plus
supply cord after the outer
START
STOP
case is installed.
6
7
8
9
0
Clear Touch On
7. Run the oven and check
Breakfast Lunch on
One Dish Popcorn Baked Sensor Custom
all functions.
the Run
Bar
Dinners
Hlep
Potatoes Reheat
Super Compu
Beverage Vegetables Main
Frozen Kitchen
Defrost Defrost
Center
Entrees Foods Timer/Clock
K
RELAY TEST
1.
2.
3.
4.
5.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Disconnect the leads to the primary of the power transformer.
Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
6. After that procedure, re-connect the power supply cord.
7. Remove the outer case and check voltage between Pin No. 1 of the 2 pin connector (A) and the normal
open terminal of the relay RY1 on the control unit with an A.C. voltmeter.
The meter should indicate 120 volts, if not check oven circuit.
RY1 and RY2 Relay Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated .......................... Defective relay.
DC. voltage not indicated ....................Check diode which is connected to the relay coil. If diode
is good, control unit is defective.
RELAY SYMBOL
8.
9.
10.
11.
12.
13.
14.
L
OPERATIONAL VOLTAGE
CONNECTED COMPONENTS
RY1
Approx. 23.4V D.C.
Oven lamp / Turntable motor / Cooling fan motor
RY2
Approx. 22.5V D.C.
Power transformer
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor. wait for 60 seconds.
Reconnect all leads removed from components during testing.
Re-install the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all function.
COMPU DEFROST TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the " COMPU DEFROST " pad and then touch the Number pad "2".
(3) Touch the Number pad " 5 " and then touch the " START " pad.
(4) The oven is in Compu Defrost cooking condition.
(5) The oven will operate as follows. (in case of Steak/Chops 0.5lb)
WEIGHT
0.5lb
1ST STAGE
LEVEL TIME
60%
30sec.
2ND STAGE
LEVEL TIME
40%
30sec.
(6) If improper operation is indicated, the control unit is probably defective and should be checked.
M
FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
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.
1. Foil pattern check and repairs.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) To discharge the high voltage capacitor, wait for 60 seconds.
4) Follow the troubleshooting guide given below for repair.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
2
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
5) Make a visual inspection of the varistor. Check for burned damage and examine the transformer
with a tester for the presence of layer short-circuit (check the primary coil resistance which is
approximately 212Ω ± 10%). If any abnormal condition is detected, replace the defective parts.
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
RY2
RY1
c
T1
(J1)
1
6) Reconnect all leads removed from components
AC
during testing.
7) Re-install the outer case (cabinet).
8) Reconnect the power supply cord after the outer
case is installed.
9) Run the oven and check all functions.
2. Follow the troubleshooting guide given below, if the indicator does not light up after above check and
repairs are finished.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) To discharge the high voltage capacitor, wait for 60 seconds.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
ba
N
P
8)
9)
10)
11)
12)
13)
14)
OCCURRENCE
2
STEPS
VRS1
d
CAUSE OR CORRECTION
1
The rated AC voltage is not present between
Pin No. 1 of the 2-pin connector (A) and the
normal open terminal of the relay RY1.
Check supply voltage and oven power cord.
2
The rated AC voltage is present at primary
side of low voltage transformer.
Low voltage transformer or secondary circuit defective.
Check and repair.
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Reconnect all leads removed from components during testing.
Re-install the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
Run the oven and check all functions.
AH SENSOR TEST
Checking the initial sensor cooking condition
WARNING : The oven should be fully assembled before following procedure.
(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 95˚F (35˚C).
(3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION
INSTRUCTIONS” of the operation manual.
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To
permit adequate ventilation, be sure to install so as not to block these vents. There should be some
space for air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture
with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be
at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapor given of by the spray and turn off before food is properly cooked.
(8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
WARNING : The oven should be fully assembled before following procedure.
Make sure the oven has been plugged in at least two minutes before checking sensor cook operation.
The cabinet should be installed and screws tightened.
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch Lunch on the Run pad and then touch number 2 pad, and touch the start pad. Now, the oven is
in the sensor cooking condition and "HOT DOGS IN BUNS SENSOR COOK" will appear in the display.
(5) The oven will operate for the first 16 seconds, without generating microwave energy.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of
sensor cooking.
(6) After approximately 16 seconds, microwave energy is produced, and the display should start to count
down the remaining cooking time and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
(1) Disconnect the power supply cord, and then remove outer case.
(2) Open the door and block it open.
(3) Discharge high voltage capacitor.
(4) Remove the AH sensor.
(5) Install the new AH sensor.
(6) Reconnect all leads removed from components during testing.
(7) Re-install the outer case (cabinet).
(8) Reconnect the power supply cord after the outer case is installed.
(9) Reconnect the oven to the power supply and check the sensor cook operation as follows:
9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
9-2. Place the container on the center of tray in the oven cavity.
9-3. Close the door.
9-4. Touch Lunch on the Run pad and then touch number 2 pad, and touch the Start pad.
9-5. The control panel is in automatic Sensor operation.
9-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (bubbling).
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation
below.
CHECKING CONTROL UNIT
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Disconnect the power supply cord, and then remove outer case.
Open the door and block it open.
Discharge high voltage capacitor.
Disconnect the sensor connector that is mounted to control panel.
Then connect the dummy resistor circuit (see fig. below) to the sensor connector of control panel.
Disconnect the leads to the primary of the power transformer.
Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
(8) After that procedure, re-connect the power supply cord.
(9) Check the sensor cook operation proceed as follows:
9-1. Touch Lunch on the Run pad and then touch number 2 pad, and touch
the Start pad.
9-2. The control panel is in the sensor cooking operation.
9-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
condition is same as judgement by AH sensor.
9-4. After approximately 3 seconds, the display shows “ X X . X X “ which is the remaining cooking
time, and the display counts down.
If the above is not the case, the control unit is probably defective.
If the above is indicated, the AH sensor is probably defective.
(10) Disconnect the power supply cord, and then remove outer case.
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TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
(11) Open the door and block it open.
(12) Discharge high voltage capacitor.
(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.
(14) Carry out necessary repair.
(15) Reconnect all leads removed from components during testing and repairing.
(16) Re-install the outer case (cabinet).
(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all
functions.
(18) Carry out "Water load cooking test" again and ensure that the oven works properly.
Plunger
R1, R2 : 22Ω ±1% 1/2W
R3 : 4.3kΩ ±5% 1/4W
R4 : 1MΩ ±5% 1/4W
F-1
F-2
NC
NO
To connector (F)
on Control Unit.
1
2
3
COM
COM NO
R1
F-3
R3
R2
CONNECTOR
NC
R4
Sensor Dummy Resistor Circuit
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units.
3) Power Source Circuit
This circuit generates voltages necessary in the control
unit from the AC line voltage.
In addition, the synchronizing signal is available in order
to compose a basic standard time in the clock circuit.
(1) Key Unit
(2) Control Unit (The Control Unit consists of Power Unit
and CPU Unit).
The principal functions of these units and the signals communicated among them are explained below.
Key Unit
The key unit is composed of a matrix, signals generated in
the LSI are sent to the key unit through P10-P17.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through AN8 - AN11
to perform the function that was requested.
Symbol
Voltage
VC
-5V
Application
LSI(IC1)
4) Relay Circuit
A circuit to drive the magnetron, fan motor, turntable
motor and light the oven lamp.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit
audible sounds (key touch sound and completion sound).
Control Unit
Control unit consists of LSI, ACL circuit, indicator circuit,
power source circuit, relay circuit, buzzer circuit, synchronizing signal circuit, absolute humidity sensor circuit and
back light circuit.
6) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit.
It accompanies a very small error because it works on
commercial frequency.
1) ACL
This circuit generates a signal which resets the LSI to the
initial state when power is supplied.
7) Door Sensing Switch
A switch to “tell” the LSI if the door is open or closed.
2) Indicator Circuit
This circuit consists of 40 segments and 16 common
electrodes using a Liquid Crystal Display. The Liquid
Crystal Display (LCD) is drived by LCD driver IC3.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD10- LD19).
9) Absolute Humidity Sensor Circuit
This circuit detects moisture of the cooking food to allow
its automatic cooking.
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LSI(IXA054DR)
The I/O signal of the LSI(IXA054DR) is detailed in the following table.
Pin No.
Signal
I/O
Description
1
AN10
IN
Signal coming from touch key.
When either G10 line on key matrix is touched, a corresponding signal out of P10 - P17
will be input into ANI0. When no key is touched, the signal is held at "H" level.
2
AN11
IN
Signal similar to AN10.
When either G9 line on key matrix is touched, a corresponding signal will be input into AN11.
3
AVSS
IN
Connected to VC.
4
P10
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G8 line keys on key matrix is touched.
5
P11
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G7 line keys on key matrix is touched.
6
P12
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G6 line keys on key matrix is touched.
7
P13
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G5 line keys on key matrix is touched.
8
P14
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G4 line keys on key matrix is touched.
9
P15
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G3 line keys on key matrix is touched.
10
P16
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G2 line keys on key matrix is touched.
11
P17
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G1 line keys on key matrix is touched.
12
X1
IN
Connected to GND.
13
X2
OUT
Terminal not used.
14
VSS
IN
15
OSC2
OUT
16
OSC1
IN
Internal clock oscillation frequency control input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to OSC2 terminal.
17
TEST
IN
Connected to VC.
18
RES
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set "L"
level the moment power is applied, at this time the LSI is reset. Thereafter set at "H" level.
19
P20
OUT
Power source voltage : -5.0V.
The power source voltage to drive LSI is input to VSS terminal. Connected to VC.
Internal clock oscillation output.
Output to control oscillation input of OSC1.
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
0.1 sec.
H : GND
A
2.0 sec.
L : -5V
H : GND
B
L : -5V
20-22
P21-P23
OUT
Terminal not used.
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Pin No.
Signal
I/O
23
P24
OUT
Description
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
16.7 msec.
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
H : GND
L : -5V
During cooking
24
P25
OUT
Magnetron high-voltage circuit driving signal.
OFF
H : GND
100
To turn on and off the cook relay (RY2). The
PERCENT ON
signals holds "L" level during microwave cookL : -5V
ing and "H" level while not cooking. In other
OFF
OFF
H : GND
24 sec.
cooking modes (variable cooking) the signal
70
8 sec.
PERCENT ON
turns to "H" level and "L" level in repetition
L : -5V
according to the power level.
(ON and OFF times for other power level.)
25
P26
OUT
Back light (Light emitting diodes) circuit driving signal.
26
P27
OUT
Terminal not used.
27-29
P30-P32
OUT
Terminal not used.
30-34
P33-P37
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor).
35
CVCC
IN
Power source voltage: GND(0V).
The power source voltage to drive LSI is input to CVCC terminal. Connected to GND.
36
VSS
IN
Power source voltage: -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
37-38
V3-V2
IN
Terminal not used.
39-40
V1-V0
IN
Power source voltage input terminal.
Standard voltage for LCD. Connected to GND.
41
VCC
IN
Power source voltage : GND(0V).
The power source voltage to drive LSI is input to VCC terminal.
42-45
COM4-COM1
OUT
Terminal not used.
46-65
SEG1-SEG20
OUT
Terminal not used.
66-69
P74-P77
OUT
Data output terminal to LCD driver IC3.
70-77
P80-P87
OUT
Data output terminal to LCD driver IC3.
78-79
P90-P91
OUT
Data output terminal to LCD driver IC3.
80-85
SEG35-SEG40
OUT
Terminal not used.
86-88
P40-P42
OUT
Terminal not used.
89
IRQ0
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
H : GND
L : -5V
16.7 msec.
90
AVCC
IN
A/D converter power source voltage : GND(0V).
The power source voltage to drive the A/D converter. Connected to GND.
91
AN0
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built
into the LSI.
92
AN1
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the
A/D converter built into the LSI.
93
AN2
IN
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level signal (-5V).
94
AN3
IN
Connected to VC through the pull-down resistor.
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Pin No.
Signal
I/O
Description
95-98
AN4-AN7
IN
Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
99
AN8
IN
Signal similar to ANI7.
When either G12 line on key matrix is touched, a corresponding signal will be input into AN8.
100
AN9
IN
Signal similar to ANI7.
When either G12 line on key matrix is touched, a corresponding signal will be input into AN9.
ABSOLUTE HUMIDITY SENSOR CIRCUIT
(1) Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors
as shown in the illustration. One thermistor is housed in
the closed vessel filled with dry air while another in the
open vessel. Each sensor is provided with the protective
cover made of metal mesh to be protected from the
external airflow.
than the detector circuit starts to function and the LSI
observes the initial voltage available at its AN1 terminal.
With this voltage given, the switches SW1 to SW5 in the
LSI are turned on in such a way as to change the
resistance values in parallel with R107 ~ R111 of IC2.
Changing the resistance values results in that there is
the same potential at both F-3 terminal of the absolute
humidity sensor and AN0 terminal of the LSI. The voltage
of AN1 terminal will indicate about -2.5V. This initial
balancing is set up about 16 seconds after the unit is put
in the Sensor Cooking mode. As the sensor cooking
proceeds, the food is heated to generate moisture by
which the resistance balance of the bridge circuit is
deviated to increase the voltage available at AN1 terminal
of the LSI.
Then the LSI observes that voltage at AN1 terminal and
compares it with its initial value, and when the comparison
rate reaches the preset value (fixed for each menu to be
cooked), the LSI causes the unit to stop sensor cooking;
thereafter, the unit goes in the next operation
automatically.
When the LSI starts to detect the initial voltage at AN1
terminal 16 seconds after the unit has been put in the
Sensor Cooking mode, if it is not possible to balance the
bridge circuit due to disconnection of the absolute humidity
sensor, ERROR will appear on the display and the
cooking is stopped.
Thermistors
Sensing part
(Closed vessel)
(2) Operational Principle of Absolute Humidity Sensor
The figure below shows the basic structure of an absolute
humidity sensor. A bridge circuit is formed by two
thermistors and two resistors (R1 and R2).
The output of the bridge circuit is to be amplified by the
operational amplifier.
Each thermistor is supplied with a current to keep it
heated at about 150˚C (302˚F), the resultant heat is
dissipated in the air and if the two thermistors are placed
in different humidity conditions they show different
degrees of heat conductivity leading to a potential
difference between them causing an output voltage from
the bridge circuit, the intensity of which is increased as
the absolute humidity of the air increases. Since the
output is very minute, it is amplified by the operational
amplifier.
C. Thermistor in
closed vessel
S. Thermistor in
open vessel
30
300k
31
R100
150k
32
R101
75k
33
R102
37.4k
34
R97
(3) Detector Circuit of Absolute Humidity Sensor Circuit
This detector circuit is used to detect the output voltage
of the absolute humidity circuit to allow the LSI to control
sensor cooking of the unit. When the unit is set in the
sensor cooking mode, 16 seconds clearing cycle occurs
S
+
IC2
VA : -15V
23
VA : -15V
P34
P35
P36
P37
R95
47k
D90
VC : -5V
SW2
SW3
SW4
SW5
AN0
0.01uF
0.01uF
R54
360k
R112
15k
R50
330
F-2
R51
3.32k R53
1.8k
SW1
P33
LSI
(IC1)
C92
Absolute humidity
F-1
C
R52
F-3
3.57k
(g/m 2 )
91
0.1uF
47k
C51
S : Thermistor
open vessel
C : Thermistor
closed vessel
Absolute humidity vs,
output voltage characteristic
620k
R99
C93
R3
R2
Operational
amplifier
Output
voltage
+
R98
0.1
uF
S
R1
Output voltage
C
1) Absolute humidity sensor circuit
C50
ventilation opening for sensing
Sensing part
(Open vessel)
92
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TOUCH CONTROL PANEL SERVICING
4) Re-install the outer case (cabinet).
5) Re-connect the power supply cord after the outer
case is installed.
6) Run the oven and check all functions.
A. On some models, the power supply cord between the
touch control panel and the oven itself is so short that the
two can’t be separated. For those models, check and
repair all the controls (sensor-related ones included) of
the touch control panel while keeping it connected to the
oven.
B. On some models, the power supply cord between the
touch control panel and the oven proper is long enough
that they may be separated from each other. For those
models, 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 activates 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
activates an operational state that is equivalent to the
oven door being closed. Connect an external power
source to the power input terminal of the touch control
panel, then it is possible to check and repair the controls
of the touch control panel it is also possible to check the
sensor-related controls of the touch control panel by
using the dummy resistor(s).
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.
approx. 1M ohm
2. Shape of Electronic Component
E
C
B
Transistor
2SB1238
3. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so. To perform
the servicing, power to the touch control panel is available
either from the power line of the oven itself or from an
external power source.
(1) Servicing the touch control panel with power supply
of the oven:
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING
SERVICING AND PRESENTS A HAZARD.
Therefore, before checking the performance of the touch
control panel,
1) Disconnect the power supply cord, and then remove
outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power
transformer.
5) Ensure that these leads remain isolated from other
components and oven chassis by using insulation
tape.
6) After that procedure, re-connect the power supply
cord.
After checking the performance of the touch control
panel,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Re-connect the leads to the primary of the power
transformer.
4. Servicing Tools
Tools required to service the touch control panel
assembly.
1) Soldering iron: 30W
(It is recommended to use a soldering iron with a
grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC-10MHz
type or more advanced model.
3) Others: Hand tools
5. Other Precautions
1) Before turning on the power source of the control unit,
remove the aluminium foil applied for preventing static
electricity.
2) Connect the connectors of the key unit to the control unit
being sure that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that abnormal
voltage due to static electricity etc. is not applied to the
input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to PWB,
making sure that all connections are tight.
5) Be sure to use specified components where high precision
is required.
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COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING AGAINST HIGH VOLTAGE:
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may
result in severe, possibly fatal, electric shock.
(Example)
High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
1. Disconnect the power supply cord.
2. Visually check the door and cavity face plate for damage
(dents, cracks, signs of arcing etc.).
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
WARNING FOR WIRING
To prevent an electric shock, take the following precautions.
1. Before wiring,
1) Disconnect the power supply cord.
2) Open the door block it open.
3) To discharge the high voltage capacitor, 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:
Base plate, Oven cavity, Waveguide flange, Angles,
Guides and other metallic plates.
4) Movable parts (to prevent a fault)
Close flow fan, Fan motor, Switch.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector until its pin is locked
and make sure that the wire leads do not come off even
if the wire leads are pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL 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 the power supply cord.
2. Open the oven door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove the two (2) screws from the lower portion of the
rear cabinet using a T20H Torx type or GTXH20-100
screw driver.
5. Remove the remaining three (3) screws from rear and
two (2) screws along the right and left sides of outer case.
6. Slide the entire outer case back out about 1 inch (3 cm)
to free it from retaining clips on the cavity face plate.
Special screw
Screw driver
(Type: TORX T1120H or
GTXH20-100)
Figure C-1. Special screw position
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7. Lift entire outer case from the unit.
CAUTION: 1. DISCONNECT OVEN FROM POWER SUP
PLY BEFORE REMOVING OUTER CASE.
2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
NOTE: When replacing the outer case, the 2 special
Torx screws must be reinstalled in the same
locations.
OVEN CAVITY ASSEMBLY REMOVAL
Before removal of the power transformer, high voltage
capacitor, high voltage rectifire, magnetron, fan motor and
turntable motor, the oven cavity must be removed from base
plate as follows.
Removal
1. Disconnect the power supply cord and then remove
outer case (refer to "OUTER CASE REMOVAL").
2. Open the oven door and block it open.
3. It is recommended that the door is removed from the
oven cavity. Refer to "DOOR REPLACEMENT".
4. Disconnect the wire leads from the power supply cord,
power unit, turntable motor, thermal cut-out (oven),
thermal cut-out (MG.), all switches on the latch hook and
the magnetron.
5. Release the two (2) snap bands of the main wire harness
from the oven cavity.
6. Remove the lamp socket from the lamp angle. Refer to
"OVEN LAMP AND LAMP SOCKET REMOVAL".
7. Remove the two (2) screws holding the front leg to the
oven cavity.
8. Remove the front leg from the oven cavity by releasing
the three (3) tabs.
9. Remove the two (2) screws holding the waveguide
flange of the oven cavity to the base plate.
10.Remove the three (3) screws holding the base plate to
the oven cavity front plate.
11.Remove the three (3) screws holding the base plate to
the oven cavity back plate.
12.Lift up the oven cavity assembly and remove it from the
base plate.
13.Now the power transformer, high voltage capacitor, high
voltage rectifier and fan motor can be found on the base
plate.
14.The magnetron can be found at wavegide flange of the
oven cavity.
15. The turntable motor can be found under the oven cavity
bottom plate.
Reinstallation
1. Make sure that the electrical parts on the base plate are
reinstalled at their positions.
2. Make sure that the wire leads are reconnected to their
correct positions. Refer to the "PICTORIAL DIAGRAM".
3. Reinstall the oven cavity assembly on the base plate.
4. Hold the base plate to the oven cavity back plate with
three (3) screws.
5. Hold the base plate to the oven cavity front plate with
three (3) screws.
6. Hold the waveguide flane of the oven cavity to the base
plate with two (2) screws.
7. Reinstall the front leg to the oven cavity front plate.
8. Hold the front leg to the oven cavity front plate with two
(2) screws.
9. Reinstall the lamp socket to the lamp angle. Refer to
procedures of "OVEN LAMP AND LAMP SOCKET
REMOVAL".
10.Insert the two (2) snap bands of main wire harness to the
two (2) holes of oven cavity.
11. Reconnect the wire leads to the magnetron, all switches,
thermal cut-out (MG.), thermal cut-out (oven.), lamp
socket, turntable motor and power supply cord. Refer to
the "PICTORIAL DIAGRAM" on page 32.
12. If the door has been removed, reinstall the door to the
oven cavity. Refer to "DOOR REPLACEMENT".
13. Now, the oven cavity assembly should be reinstalled.
POWER TRANSFORMER REMOVAL
Reinstallation
1. Rest transformer on the base plate with its primary
terminals toward the left side.
2. Secure transformer with four screws to base plate.
3. Re-connect wire leads (primary and high voltage) to
power transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to
"PICTORIAL DIAGRAM".
4. Reinstall the oven cavity assembly to the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
5. Re-install outer case and check that oven is operating
properly.
1. Disconnect the power supply cord and then remove
outer case.
2. Remove the oven cavity assembly from the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
3. Discharge the high voltage capacitor.
4. Disconnect the wire leads (primary and high voltage)
from power transformer and the filament leads from the
magnetron and capacitor terminals.
5. Remove four (4) screws holding transformer to base
plate.
6. Remove transformer from base plate.
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL
2. Remove the oven cavity assembly from the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
1. Disconnect the power supply cord and then remove
outer case.
26
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3. Discharge the high voltage capacitor.
4. Disconnect the high voltage wire B from the power
transformer.
5. Disconnect the high voltage wire of the high voltage
rectifier assembly from the magnetron.
6. Disconnect the filament lead (short one) of the power
transformer from the high voltage capacitor.
7. Remove one (1) screw holding capacitor holder to base
plate.
8. Remove one (1) screw holding high voltage rectifier
assembly to capacitor holder.
9. Disconnect rectifier terminal from the capacitor.
High voltage rectifier assembly is now free.
10.Disconnect the high voltage wire B from the high voltage
capacitor.
11.Remove the capacitor holder. The capacitor is now free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH
VOLTAGE RECTIFIER MUST BE SECURED
FIRMLY WITH A GROUNDING SCREW.
MAGNETRON REMOVAL
Reinstallation
1. Re-install the magnetron thermal cut-out angle with
thermal cut-out (MG) to magnetron with the two (2)
screws.
2. Re-install the magnetron to waveguide flange with the
four (4) screws.
3. Re-install the oven cavity assembly to the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
4. Reconnect the wire leads to the magnetron and thermal
cut-out (MG). Refer to "PICTORIAL DIAGRAM" on page
32.
5. Re-install outer case and check that the oven is operating
properly.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY.
Removal
1. Disconnect the power supply cord and then remove
outer case.
2. Remove the oven cavity assembly from the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
3. Discharge the high voltage capacitor.
4. Now, the wire leads should be disconnected from the
magnetron and thermal cut-out (MG).
5. Carefully remove the four (4) screws holding magnetron
to waveguide flange.
6. Remove magnetron with care so that magnetron antenna
is not hit by any metal object around antenna.
7. Remove the two (2) screws holding the magnetron
thermal cut-out angle to the magnetron.
8. Remove the magnetron thermal cut-out angle with thermal
cut-out (MG) from magnetron.
9. Now, the magnetron is free.
OVEN LAMP AND LAMP SOCKET REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove the oven lamp from the oven lamp socket.
5. Pull the wire leads from the oven lamp socket by pushing
the terminal hole of the oven lamp socket with the small
flat type screw driver.
6. Bend the tab of the partition angle holding the lamp
socket.
7. Remove the oven lamp socket from the lamp angle.
8. Now, the oven lamp socket is free.
Oven lamp
socket
Terminal
Wire lead
Terminal hole
Flat type small
screw driver
Figure C-2. Oven lamp socket
FAN MOTOR REMOVAL
7. Remove two (2) screws holding the magnetron air guide
A to the base plate and fan case assembly. And remove
it from the base plate.
8. Remove four (4) screws holding the fan case assembly
to the base plate.
9. By sliding the fan case assembly rightward, remove the
fan case assembly with the fan motor from the base plate.
10.By using a hexagonal key wrench (2 mm), loosen the one
(1) hexagonal screw holding the cross flow fan to the fan
motor shaft.
11.Remove the two (2) screws holding the fan motor
mounting angle to the fan case assembly.
REMOVAL
1. Disconnect the power supply cord and then remove the
outer case.
2. Remove the oven cavity assembly from the base plate.
Refer to "OVEN CAVITY ASSEMBLY REMOVAL".
3. Discharge the high voltage capacitor.
4. Disconnect the wire leads from the fan motor.
5. Remove one (1) screw holding the separate angle B to
the base plate. And remove it from base plate.
6. Remove two (2) screws holding the magnetron air guide
B to the base plate and fan case assembly. And remove
it from the base plate.
27
R- 630DK
R-630DW
R -630 DS
12.Remove the fan motor with the fan motor mounting angle
from the fan case assembly and the cross flow fan.
13.Remove the two (2) screws holding the fan motor
mounting angle to the fan motor.
14.Now, the fan motor is free.
TURNTABLE MOTOR REMOVAL
1. Disconnect the power supply cord.
2. Remove turntable and turntable support from oven cavity.
3. Lay the oven on it's backside. Remove the turntable
motor cover by snipping off the material in four corners.
4. Where the corners have been snipped off bend corner
areas flat.
5. Disconnect wire leads from turntable motor.
(See "Positive lock connector removal")
6. Remove two (2) screws holding turntable motor to oven
cavity.
7. Remove the TTM packing from the turntable motor
shaft.
8. Now the turntable motor is free.
9. After replacement use the one (1) screw to fit the
turntable motor cover.
CAUTION: NO SHARP EDGES MUST BE EVIDENT AFTER REMOVAL OF THE TURNTABLE MOTOR COVER.
POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Push the lever of positive lock® connector.
5. Pull down on the positive lock® connector.
Positive lock®
connector
1
Push
Lever
CAUTION: WHEN CONNECTING THE POSITIVE LOCK®
CONNECTORS TO THE TERMINALS, CONNECT THE POSITIVE LOCK® SO THAT THE
LEVER FACES YOU
2
Pull down
Figure C-3. Positive lock® connector
TERMINAL INSULATOR REPLACEMENT
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Open covers of the terminal insulator by using small flat
type screw driver.
5. Remove the receptacle from the terminal insulator.
6. Now, the terminal insulator is free.
Installation
Terminal
insulator
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown below.
3. Reconnect all leads removed from components during
testing.
4. Reinstall the outer case (cabinet).
5. Reconnect the power supply cord after the outer case is
installed.
6. Run the oven and check all functions.
Covers
Flat type
screw driver
Receptacle
Figure C-4(a). Terminal insulator
Figure C-4(b). Terminal insulator
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
Reinstallation
1. Re-install each switch in its place. The secondary
interlock/monitor switches are in the lower position and
the door sensing switch is in the upper position.
2. Re-connect wire leads to each switch.
Refer to pictorial diagram.
3. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and Adjustment procedure.
1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Disconnect the wire leads from the switches.
5. Push outward on the one (1) retaining tabs holding
switch in place.
6. The switch is now free.
28
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DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
the latched position. First check upper position of latch
hook, pushing and pulling upper portion of door toward
the oven face. Then check lower portion of the latch
hook, pushing and pulling lower portion of the door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
2. The contacts of door sensing switch and secondary
interlock switch open within 1.6mm gap between right
side of cavity face plate and door when door is open.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
If the door sensing switch, secondary interlock switch and
monitor switch do not operate properly due to a
misadjustment, the following adjustment should be made.
4. Loosen the two (2) screws holding latch hook to the oven
cavity front flange.
5. With door closed, adjust latch hook by moving it back and
forth, and up and down. In and out play of the door
allowed by the upper and lower position of the latch hook
should be less than 0.5mm. The vertical position of the
latch hook should be adjusted so that the door sensing
switch and secondary interlock switch are activated with
the door closed. The horizontal position of the latch hook
should be adjusted so that the plunger of the monitor
switch is pressed with the door closed.
6. Secure the screws with washers firmly.
7. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
Latch Hook
Door
Latch
Heads
Door Sensing
Switch
Monitor Switch
Secondary
Interlock Switch
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in
Figure C-5. Latch Switch Adjustments
DOOR REPLACEMENT
REMOVAL
1. Disconnect the power supply cord and then remove the
outer case.
2. Open the door slightly.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. Disconnect the wire harness from the power unit on the
base plate.
5. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-6 to free engaging parts.
6. Pry the choke cover by inserting a putty knife as shown
Figure C-6.
7. Release choke cover from door panel.
8. Now choke cover is free.
11.Now, the door is free from the oven cavity.
REINSTALLATION
1. Insert the wire harness to the holes of the front leg and
the oven cavity front plate.
2. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
3. Re-install choke cover to door panel by pushing.
4. Connect the wire harness to the power unit on the base
plate.
5. Now the door is installed.
Note: After any service to the door;
(A) Make sure that door sensing switch and secondary
interlock switch are operating properly. (Refer to
chapter “Test Procedures”.).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
2. Deviation of door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave
Measurement Procedure.)
Choke cover
Door frame
Putty knife
Figure C-6. Door Disassembly
9. Release two (2) pins of door panel from two (2) holes of
upper and lower oven hinges by lifting up.
10.When pulling out the wire harness from the hole of the
oven cavity front plate and the front leg. Remove the door
from the oven cavity.
29
R- 630DK
R-630DW
R -630 DS
Note: The door on a microwave oven is designed to act as
an electronic seal preventing the leakage of
microwave energy from oven cavity during cook cycle.
This function does not require that door be air-tight,
moisture (condensation)-tight or light-tight. Therefore,
occasional appearance of moisture, light or sensing
of gentle warm air movement around oven door is not
abnormal and do not of themselves indicate a leakage
of microwave energy from oven cavity.
Wire harness
Power unit
Door
Wire harness
Tab
Front leg
e
Hol
Door Screen
Hole
Front leg
Oven cavity front plate
Base plate
Figure C-8. Routing of wire harness
Pin
SEALER FILM
Upper oven hinge
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.
Upper oven
hinge
Sealer film
Lower oven
hinge
Backing film
Adhesive tape
Choke cover
Lower oven
Pin hinge
Figure C-9. Sealer film
Figure C-7. Door Replacement
INDIVIDUAL DOOR PARTS REMOVAL
10.Disconnect the ribbon cable of the key unit from the CPU
unit.
11.Remove the two (2) screws holding the LCD holder to the
door screen.
12.Remove the LCD holder from the door screen. Release
the four (4) tabs.
13.Release the LCD of the CPU unit from the LCD holer.
14.Remove the two (2) screws holding the CPU unit to te
LCD holder.
15.Remove the CPU unit from the LCD holder. Release the
four (4) tabs.
16.Now the CPU unit is free.
DOOR PANEL
1. Disconnect the power supply cord.
2. Remove the door from the oven. Refer to "DOOR
REPLACEMENT".
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. The choke cover should have been removed.
5. Remove the four (4) screws holding the door panel to
the door screen.
6. Now, door panel is free.
HANDLE
7. Remove the two (2) screws holding the handle mounting
angle to the handle through the door screen.
8. Now, the handle is free.
DOOR FRAME AND DOOR SCREEN ASSEMBLY
17.Remove the handle from the door screen assembly.
Refer to the chapter of HANDLE.
18.Releasing the four (4) tabs, remove the door frame
from the door screen assembly
19.Now, the door frame and the door screen assembly is
free.
NOTE: For wire harness
Before the door panel is reinstalled to the door
screen assembly, make sure that the wire harness
is held by the five (5) pairs of tabs on the door screen
as shown in Figure C-10.
LATCH HEAD AND LATCH SPRING
7. Slide the latch head and remove it from the door frame
with releasing the latch spring from the door frame and
the latch head.
8. Now, the latch head and the latch spring are free.
CPU UNIT
7. Remove the two (2) screws holding the PWB cover to
the door screen.
8. Releasing the two (2) tabs, remove the PWB cover from
the door screen.
9. Disconnect the wire harness from the CPU unit.
30
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PWB Cover
Tabs
Tabs
Door screen
wire harness
Tabs
Tabs
Tabs
Figure C-10. Routing of wire harness
NOTE: For key sheet
1. Before attaching a new key sheet, wipe off
remaining adhesive on the door screen surfaces
completely with a soft cloth soaked in alcohol.
2. When attaching the key sheet to the door screen,
adjust the upper edge and left edge of the key
sheet to the correct position of door screen.
3. Stick the key sheet firmly to the door screen by
rubbing with a soft cloth so not to scratch.
NOTE: For CPU unit
Handle the CPU unit carefully so that the ribbon
cable does not come off. Because the ribbon cable
is glued onto the LCD and the printed wiring board
only by heated paste.
Printed wiring board
of CPU unit
Liquid Crystal
Display (LCD)
Ribbon cable
Figure C-11. CPU unit
31
1
2
3
4
32
BLK
5
H
6
BLU/
12
GRN
1
3
CN-F
12
CN-F
1 BLK
2 RED
3 WHT
CN-B
3 GRY
2
1 GRN
AH SENSOR
POWER UNIT
CN-C
2
Figure S-1. Pictorial Diagram
FAN MOTOR
BLK
BLK
GRY
WHT
BLK
MONITOR FUSE
& HOLDER
BLK
WHT
TURNTABLE
MOTOR
BLK
THERMAL
CUT-OUT (OVEN)
BLK
MAGNETRON
N.C.
COM.
GRY
GRN
WHT
GRY
WHT
WHT
WHT
COM.
BLK
YLW
THERMAL
CUT-OUT (MG)
N.O.
SECONDARY NO
INTERLOCK
SWITCH
MONITOR
SWITCH
RED
COM.
DOOR
SENSING
SWITCH
5
PNK 11
GRY 8
WHT 9
BLK 10
PPL 7
BLU 6
GRN 5
ORG 3
YLW 4
1
CN-B
RED
YLW
YLW
2
E
RED 2
RY2
PRIMARY
INTERLOCK
RELAY
1
RY1
2
1 WHT
CN-A
2 RED
1 BRN
3 ORG
4 YLW
BLK 2 BLK
WHT 1 WHT
BLK
H.V.
RECTIFIER
POWER
TRANSFORMER
OVEN LAMP
AND SOCKET
4
BRN 1
CN-C
1
CN-A
CPU UNIT
(on the door)
CN-C
1
12
6 BLU
5 GRN
7 PPL
8 GRY
9 WHT
10 BLK
RED
GRY
GRY
3
RED
12
CN-G
1
CN-C
BLU/
GRN
11 PNK
12
BLK
WHT
2
RED
RED
N
G
WHT
HIGH VOLTAGE
WIRE B
NOTE:
Hot (YLW) wire must be
connected to the terminal
with blue mark on the
oven light socket.
BLUE MARK
1
NOTE:
The grounding conductor of
the power supply cord has
been grounded by power
supply cord fixing screw.
The screw must allways be
kept tight.
F
H
POWER SUPPLY
CORD 120V 60Hz
C
HIGH VOLTAGE
CAPACITOR
WHT
A
NOTE:
The neutral (WHT) wire must be
connected to the neutral (WHT)
wire of the power supply cord.
D
YLW
B
HIGH VOLTAGE COMPONENTS
R- 630DK
R-630DW
R -630 DS
6
A
B
C
D
E
F
G
H
R -630DK
R-630DW
R -630DS
2
1
4
3
6
5
A
A
B
B
+
–
+
–
C3 10µ/35v
b
ZD1
HZ16-1
4
NO
MICRO
6
R53
1.8kF
8
4
VA
C1
INT
C5
VR
F-1
F-3
B-2
CN-B
D
C4
BUZZER
C8
AH
E
B-1
F-2
F
C6
R54
360kF
COM
DOOR
SENSING
SWITCH
GND2
7
R50 330 1w
RY2
5
C51
0.1µ/50v
COM
IC2
BA4558
C50 0.1µ/50v
R51 3.32kD
NO
SP1
PKM22EPT
R52 3.57kD
RY1
E
C7
R2 680 1/2w
D
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
GND1
C
c
AC
C10
Q1
2SB1238
(J1)
a
1
R1 2.4k
d
C
CN-C
D1
S1NB10
C2 0.1µ/50v
A2
7
10G471K
A1
VRS1
AC
T1
3
C1 1000µ/35v
CN-A
C9
AHR
C3
C2
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
MICRO
C11
N.C.
C12
DOOR
SENSING
SWITCH
F
CN-F
G
G
H
H
Figure S-2. Power Unit Circuit
1
2
4
3
33
5
6
C8
C4
C9
C6
AH
BUZZER
VA
3
34
C2
C11
C12
DOOR
LD10 LD11 LD12 LD13
NOTE
R30 3.3k
4
Q21
DTD143EKA
JA
C20
Q20
0.1µ/50v
DTA143EKA
Q30
DTA143EKA
Q10 DTA143EKA
Q22
DTA123JKA
–
+
: IF NOT SPECIFIED 1/10W ± 5%
D40
MA152WA
D20
MA152WA
R31 3.3k
LD19
R104 680 1/2w
Q1
KTA1661
R5 1k
ZD1 UDZ4.3B
R41 15k
C4
0.01µ/25v
R6 15k
D90
MA152WA
Q2
2SA1037AK
5
R71 15k
R70 15k
(J16)
(J17) 4.7k
R97 47k
R95 47k
R111
4.7k
1
IC1
IXA054DR
5
C60 330pF/50v
C61 330pF/50v
(J12)
(J13) 4.7k
Figure S-3. CPU Unit Circuit
KEY UNIT
Super
Defrost
6
Frozen
Kitchen
Foods Timer/Clock
0
9
G1
Beverage Vegetables
Main
Center
Entrees
8
7
5
4
G2
Compu
Defrost
3
2
G3
G4
One Dish
Baked
Dinners Popcorn Potatoes
G5
G6
A
E
D
C
B
Breakfast Lunch on
Bar
the Run
G7
CF1
CST4.00MGW
SEG5
SEG4
SEG3
SEG2
SEG1
COM1
COM2
COM3
COM4
VCC
V0
V1
V2
V3
VSS
CVCC
P37
P36
P35
P34
Power
Minute
Level
Plus
START
STOP
Clear Touch On
Sensor Custom
Reheat
Help
1
G8
SEG36
SEG37
SEG38
SEG39
SEG40
P40
P41
P42
IRQ0
AVCC
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
See Fig. S-4
4
R69 15k
R68 15k
(J14)
(J15) 4.7k
R112 15k
VC
GND
3
N.C.
MICRO
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
C3
C1
INT
AHR
C7
C5
C1 0.1µ/50v
GND2
VR
R2 4.7k
R3 10k
–
C2 47µ/16v
R10 15k
R1 33
C10
0.1µ/50v
C21
10µ/35v
C3 0.01µ/25v
C11 0.01µ/25v
R40 4.7k
(J10)
(J11) 4.7k
E
R101 75kF
D
R100 150kF
C
R77 270k
R102 37.4kF
C40
0.01µ
/25v
R99 300k
B
R76 270k
R75 270k
R98 620k
A
R74 270k
+
C62 330pF/50v
LD15 LD16 LD17 LD18
C63 330pF/50v
C92
0.01µ/25v
G12 G11 G10 G 9
LD14
C93
0.01µ/50v
C10
R66 15k
2
R65 15k
1
R64 15k
F
R63 15k
G
SEG35
P91
P90
P87
P86
P85
P84
P83
P82
P81
P80
P77
P76
P75
P74
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
D
AN10
AN11
AVSS
P10
P11
P12
P13
P14
P15
P16
P17
X1
X2
VSS
OSC2
OSC1
TEST
RES
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
C
R67 15k
B
R80
1M
GND
A
R62 15k
H
2
R61 15k
1
R60 15k
E
CPU UNIT
R- 630DK
R-630DW
R -630 DS
6
A
B
C
6
D
E
F
G
H
C124 0.1µ/50v
1
H
E
R133 510k
G
1
100
2
IC3
IXA044DR
3
76
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
75
SENSOR DEFROST TURNTABLE OFF COOK HELP
3
F
A
LIQUID CRYSTAL DISPLAY
1
51
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
B
2
4
C122 0.1µ/50v
C121 0.1µ/50v
C120 0.1µ/50v
50
VDD
NC
NC
RESET
TEST
VREF
R03
R02
R01
R00
P13
P12
P11
P10
P03
P02
P01
P00
K03
K02
K01
K00
NC
NC
NC
26
C126
0.1µ/50v 25
R132 33k
C123 0.1µ/50v
D
R130 4.7k
VC
GND
IC1 P91
IC1 P90
IC1 P87
IC1 P86
IC1 P85
IC1 P84
IC1 P83
IC1 P82
IC1 P81
IC1 P80
IC1 P77
IC1 P76
R123 4.7k
R125 4.7k
R124 4.7k
R127 4.7k
R126 4.7k
: IF NOT SPECIFIED, 1/10W ± 5%
C125
0.1µ/50v
4
5
5
Figure S-4. Indicator Circuit
C129
0.1µ/50v
R134 15k
R128 4.7k
OSC4
OSC3
VD1
OSC2
OSC1
VSS
BZ
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
VC1
VC2
VC3
VC4
VC5
CF
CE
CD
CC
CB
CA
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG39
SEG38
SEG37
SEG36
SEG35
C127
0.1µ/50v
C128
0.1µ/50v
IC1 P75
IC1 P74
NOTE
R121 4.7k
R120 4.7k
R122 4.7k
R129 4.7k
R131 4.7k
35
6
H
G
F
C
E
D
C
B
A
6
R -630DK
R-630DW
R -630DS
R- 630DK
R-630DW
R -630 DS
1
14
1
D1
(D8)
7
1
S
T1
6
2
5
P
VRS1
4
3
2
1
CN - A
6
5
F
F
DIP CN - C
8
OM
DU
RY2 MICRO
AC
CN - F
1
C2
SP1
3
(D9)
R54
CN - B
(D7)
1
(J1)
36
C50
JX
JY
R53
R51
R52
(C52)
1
CN - H
C51
E C B
2
OL,TTM,FM
RY1
DU
4
3
2
1
E
E
R50
C3
Q1
OM
2
1
D
D
IC2
R2
R1
C1
ZD1
C
C
B
B
6
5
4
3
2
1
A
A
G
G
H
H
Figure S-5. Printed Wiring Board of Power Unit
R - 630DK
R -630 DW
R - 630 DS
PARTS LIST
Note: The parts marked “ ∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY
CODE
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AQ
AH
AH
AS
AK
AP
AV
AW
BK
AH
AG
AE
AQ
AS
AK
BG
AU
1
1
1
1
1
1
1
1
1
2
AY
AC
AC
BD
BD
BD
AL
AL
AL
AD
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BB
AC
AC
AE
AD
AF
AA
AA
AA
AG
AK
AA
AA
AA
AA
AC
AC
AA
AA
AK
AM
AG
AP
AE
AA
1
1
1
1
1
1
1
1
1
AH
AD
AL
AP
AE
AF
AG
AL
AC
ELECTRIC PARTS
*
*
*
∆*
1- 1
1- 2
1- 3
1- 4
1- 5
1- 6
1- 7
1- 8
1- 9
1-10
1-11
1-11
1-12
1-12
1-13
1-14
1-15
FACCDA083WRE0
QFSHDA009WRE0
QSW-MA137WRE0
FFS-BA023WRK0
RTHM-A116WRE0
FH-DZA097WRKZ
RC-QZA211WRE0
RMOTEA395WRZZ
RTRN-A609WRZZ
QSOCLA021WRE0
RLMPTA068WRE0
RLMPTA030WRE0
RMOTDA229WRE0
RMOTDA211WRE0
RTHM-A123WRZZ
RV-MZA310WRZZ
FDTCTA209WRKZ
Power supply cord
Fuse holder
2nd interlock switch / door sensing switch
Monitor fuse 20A and monitor switch (AM5160C53Y1) assembly
Thermal cut-out 125 deg. C (MG)
High voltage rectifier assembly
High voltage capacitor
Fan motor
Power transformer
Oven lamp socket
Oven lamp
Oven lamp (Interchangeable)
Turntable motor
Turntable motor (Interchangeable)
Thermal cut-out 125 deg. C (OVEN)
Magnetron
AH sensor
2222222222-
FDAI-A215WRYZ
GLEGPA074WRE0
GLEGPA081WRFZ
GCABUA773WRPZ
GCABUA775WRPZ
GCABUA777WRPZ
GLEGPA080WRFZ
GLEGPA082WRFZ
GLEGPA080WRFZ
PPACGA178WREZ
Base plate
Foot
Leg
Outer case
Outer case
Outer case
Front leg
Front leg
Front leg
Cushion
DPWBFC096WRUZ
QCNCMA446DRE0
QCNCMA431DRE0
QCNCMA463DRZZ
QCNCMA237DRE0
VCEAB31VW108M
RC-KZA087DRE0
VCEAB31VW106M
RC-KZA087DRE0
RSRCDA013DRE0
VHIBA4558//-6
VS2SB1238//-3
VRD-B12EF242J
VRD-B12HF681J
VRS-B13AA331J
RR-DZA285DRZZ
RR-DZA286DRZZ
VRN-B12EK182F
VRN-B12EK364F
RRLY-A076DRE0
RRLY-A113DRE0
RALM-A014DRE0
RTRNPA111DRE0
RH-VZA032DRE0
VHEHZ161///-1
Power unit
2-pin connector (CN-A)
2-pin connector (CN-B)
12-pin connector (CN-C)
3-pin connector (CN-F)
Capacitor
1000 uF
Capacitor
0.1 uF
Capacitor
10 uF
Capacitor
0.1 uF
Diode (S1NB10)
IC (BA4558)
Transistor (2SB1238)
Resistor
2.4k ohm
Resistor
680 ohm
Resistor
330 ohm
Resistor
3.32k ohm
Resistor
3.57k ohm
Resistor
1.8k ohm
Resistor
360k ohm
Relay (OMIF-S-124LM)
Relay (DU24D1-P(M)-R)
Buzzer (PKM22EPT)
Transformer
Varistor (10G471K)
Zener diode (HZ16-1)
CABINET PARTS
1
2
3
4
4
4
5
5
5
6
cabinet [R-630DK]
cabinet [R-630DW]
cabinet [R-630DS]
[R-630DK]
[R-630DW]
[R-630DS]
POWER UNIT PARTS
3- 1
3- 1A
3- 1B
3- 1C
3- 1D
C1
C2
C3
C50-51
D1
IC2
Q1
R1
R2
R50
R51
R52
R53
R54
RY1
RY2
SP1
T1
VRS1
ZD1
35V
50V
35V
50V
1/4W
1/2W
1W
1/4W
1/4W
1/4W
1/4W
OVEN PARTS
∆ 4- 1
44444444-
2
3
4
5
6
7
8
9
PHOK-A118WRFZ
LBNDKA099WRW0
LFLG-A028WREZ
FANGKA211WRWZ
LANGRA055WRWZ
LANGRA056WRWZ
NFANJA046WREZ
LANG-A069WRPZ
LANG-A080WRWZ
Latch hook
Capacitor holder
Bearing
Fan case assembly
Fan motor mounting angle
Bearing holder
Closs flow fan
Magnetron air guide A
Magnetron air guide B
37
R -630DK
R-630DW
R -63 0 DS
∆
REF. NO.
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
PART NO.
PPACGA084WRF0
LANG-A081WRWZ
*************
GCOVHA419WRFZ
LANGQA526WRWZ
LANG-A077WRPZ
PCOVPA361WREZ
PCUSGA057WRP0
PCUSUA557WRPZ
PCUSUA556WRPZ
PCUSUA126WRE0
PPACGA177WREZ
PCUSUA560WRPZ
PCUSUA376WRP0
PCUSGA548WRPZ
PCUSUA558WRPZ
PDUC-A761WRTZ
LANGFA200WRPZ
PCUSUA375WRP0
PCUSGA247WRP0
PCUSGA057WRP0
DESCRIPTION
TTM packing
Separate angle B
Oven cavity (Not a replaceable part)
Choke cover
Lamp angle
Magnetron thermal cut-out angle
Waveguide cover
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Cushion
Exhaust duct
Support angle
Cushion
Cushion
Cushion
Q'TY
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
CODE
AE
AD
-AK
AC
AC
AD
AA
AC
AC
AC
AC
AB
AF
AK
AC
AL
AD
AH
AA
AA
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
4
1
1
1
1
2
1
1
2
AS
AG
BH
BG
BH
BA
BA
BA
AR
AV
AR
AP
AP
AP
AR
AE
AC
AD
AD
AD
AA
AA
AC
AC
AE
AK
AA
AT
BH
AA
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AP
AX
AS
AF
AB
AF
AC
AC
AC
AE
AF
AF
AC
AD
3
2
AA
AA
DOOR PARTS
∆ 5- 1
∆
∆
∆
∆
∆
∆
5- 2
5- 3
5- 3
5- 3
5-3-1
5-3-1
5-3-1
5- 4
5- 4
5- 4
5- 5
5- 5
5- 5
5- 6
5- 7
5- 8
5- 9
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-17
5-18
5-19
5-20
5-21
FDORFA343WRTZ
PSHEPA735WREZ
FPNL-A042WRKZ
FPNL-A043WRKZ
FPNL-A042WRKZ
PSHEPA741WREZ
PSHEPA742WREZ
PSHEPA741WREZ
GWAKPA736WRFZ
GWAKPA737WRFZ
GWAKPA738WRTZ
JHNDPA188WRTZ
JHNDPA188WRTZ
JHNDPA186WRMZ
LANGKA941WRPZ
LSTPPA193WRFZ
MSPRTA187WRE0
LHLD-A226WRFZ
PCOVPA367WRWZ
LX-EZA059WREZ
XCPSD40P08000
XEPSD30P08XS0
PCUSGA545WRPZ
PCUSUA559WRPZ
PCUSUA445WRP0
PSHEPA672WRE0
XEPSD40P16000
FW-VZA265DREZ
DPWBFC097WRKZ
XCPSD40P06000
Door panel
Sealer film
Door screen assembly [R-630DK]
Door screen assembly [R-630DW]
Door screen assembly [R-630DS]
Key sheet [R-630DK]
Key sheet [R-630DW]
Key sheet [R-630DS]
Door frame [R-630DK]
Door frame [R-630DW]
Door frame [R-630DS]
Handle [R-630DK]
Handle [R-630DW]
Handle [R-630DS]
Handle mounting angle
Latch head
Latch spring
LCD holder
PWB cover
Special screw
Screw : 4mm x 8mm
Screw : 3mm x 8mm
Cushion
Cushion
Cushion
LED sheet
Screw : 4mm x 16mm
12-pin wire harness
CPU unit
Screw : 4mm x 6mm
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
FROLPA095WRKZ
NTNT-A099WRE0
FW-VZB789WREZ
QW-QZA150WRE0
PZET-A012WRE0
TCAUAA156WRR0
TCAUAA166WRR0
TCAUAA254WRR0
TCAUAA255WRR0
TINSEA863WRRZ
FW-VZB801WREZ
FW-VZB802WREZ
TLABMA646WRRZ
TCADCA724WRRZ
Turntable support
Turntable tray
Main wire harness
High voltage wire B
Terminal insulator
User caution label
DHHS caution label
Monitor caution label
Screw caution
Instruction book
Switch harness
T.T. motor harness
Menu label
Recipe sheet
MISCELLANEOUS
*
SCREWS,NUTS AND WASHERS
7- 1
7- 2
XHPSD40P08K00
XBPSD40P08K00
Screw : 4mm x 8mm
Screw : 4mm x 8mm
38
R - 630DK
R -630 DW
R - 630 DS
REF. NO.
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
7-11
7-12
7-13
7-14
7-14
7-14
7-15
7-16
7-17
7-18
PART NO.
XOTSD40P08000
LX-EZA057WREZ
LX-CZA073WRE0
XHPSD30P08XS0
XHTSD40P08RV0
LX-CZA070WRE0
LX-CZ0052WRE0
XHPSD30P06000
XHTSD40P08000
XHTSD40P12RV0
XOTSD40P12RV0
XOTSF40P08000
XOTSE40P08000
XOTSE40P08000
XOTSD40P12000
XOTSD40P10000
LX-EZA060WREZ
XHBWW30P08000
DESCRIPTION
Screw :
Special
Special
Screw :
Screw :
Special
Special
Screw :
Screw :
Screw :
Screw :
Screw :
Screw :
Screw :
Screw :
Screw :
Special
Screw :
4mm x
screw
screw
3mm x
4mm x
screw
screw
3mm x
4mm x
4mm x
4mm x
4mm x
4mm x
4mm x
4mm x
4mm x
screw
3mm x
Q'TY
14
4
2
2
1
2
2
1
16
1
3
2
2
2
2
1
4
2
8mm
8mm
8mm
(Torx tamper proof screw)
6mm
8mm
12mm
12mm
8mm [R-610DK]
8mm [R-610DW]
8mm [R-610DS]
12mm
10mm
8mm
CODE
AA
AC
AC
AB
AA
AC
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO.
4. DESCRIPTION
Order Parts from the authorized SHARP parts Distributor for your area.
Defective parts requiring return should be returned as indicated in the Service Policy.
PACKING AND ACCESSORIES
TOP PAD ASSEMBLY
DOOR PROTECTION SHEET
FPADBA426WRKZ
SPADPA178WRE0
PLASTIC BAG
SSAKHA032WRE0
CABINET COVER (for R-630DK/DS)
FORM SHEET (for R-630DK/DS)
SPAKHA016WREZ
SPAKHA015WREZ
6-10 INSTRUCTION BOOK
& PRINTING MATTER
BOTTOM PAD ASSEMBLY
6- 2
TURNTABLE TRAY
FPADBA427WRKZ
6- 1 TURNTABLE SUPPORT
TRAY PACK
INTO THE
OVEN CAVITY
SPADFA481WREZ
Not replaceable items.
39
PACKING CASE
SPAKCD439WREZ [R-630DK]
SPAKCD438WREZ [R-630DW]
SPAKCD437WREZ [R-630DS]
R -630DK
R-630DW
R -63 0 DS
2
1
4
3
6
5
7-13
OVEN AND CABINET PARTS
7-18
2-4
4-23
A
A
1-15
7-5
7-14
4-26
4-17
7-8
B
B
1-13
6-8
7-12
6-9
4-12
4-24
1-1
4-28
C
7-14
7-3
4-18
4-27
4-30
C
6-7
7-3
7-11
6-6
7-3
4-11
4-19
7-3
D
7-3
4-14
7-11
D
7-11
7-5
4-15
A
4-16
4-10
1-10
7-10
1-11
7-17
1-12
6-13
7-9
7-11
4-9
4-20
1-5
7-11
E
1-3
1-14
1-8
7-11
7-3
E
4-4
7-11
7-1
1-4
4-1
7-11
7-15
4-7
7-2
2-6
F
1-3
4-25
2-5
7-4
4-21
4-6
7-7
F
7-11
1-4
1-6
7-15
2-6
4-8
4-3
4-5
4-2
7-6
7-11
7-1
6-2
1-2
1-7
1-9
4-22
2-3
G
G
3-1
4-29
7-16
6-1
4-22
2-1
A
H
H
2-2
1
2
4
3
40
5
6
R - 630DK
R -630 DW
R - 630 DS
2
1
4
3
6
5
5-13
A
A
5-13
DOOR PARTS
5-20
5-10
5-11
5-9
5-17
5-12
5-14
4-13
5-13
5-2
5-11
B
5-12
B
5-12
5-1
5-21
C
C
5-12
5-6
5-19
5-21
5-18
5-15
5-4
D
D
5-16
5-7
5-8
5-3-1
5-3
MISCELLANEOUS
E
E
5-5
6-3
Actual wire harness may be different from illustration.
(CAPACITOR)
6-11
6-4
F
F
6-5
6-12
G
G
H
H
1
2
4
3
41
5
6
R -630DK
R-630DW
R -63 0 DS
COPYRIGHT © 2000 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.
2000 SHARP CORP. (7S2.530E) Printed in U.S.A
42