R-230KK
R-230KW
SERVICE MANUAL
No. S2501R230KPKW
MICROEAVE OVEN
MODELS
R-230KK
R-230KW
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..)
CONTENTS
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID EXPOSURE TO
EXCESSIVE MICROWAVE ENERGY
CHAPTER 7. TROUBLESHOOTING GUIDE
BEFORE SERVICING
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
CHAPTER 8. TEST PROCEDURES
CHAPTER 1. WARNING TO SERVICE PERSONNEL
CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE
CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER
CHAPTER 3. FOREWORD AND WARNING
CHAPTER 11. COMPONENT REPLACEMENT AND
ADJUSTMENT PROCEDURE
CHAPTER 4. PRODUCT DESCRIPTION
CHAPTER 12. CIRCUIT DIAGRAMS
CHAPTER 5. GENERAL INFORMATION
Parts Guide
CHAPTER 6. OPERATION
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CONTENTS
PRECAUTIONS TO BE OBSERVED BEFORE
AND DURING SERVICING TO AVOID EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
BEFORE SERVICING
CHAPTER 1. WARNING TO SERVICE PERSONNEL
[1] Before Servicing.......................................... 1-1
[2] When the testing is completed,................... 1-1
[3] After repairing.............................................. 1-1
CHAPTER 2. MICROWAVE MEASUREMENT
PROCEDURE
[1] Requirements:............................................. 2-1
[2] Preparation for testing:................................ 2-1
[3] Leakage test: .............................................. 2-1
CHAPTER 3. FOREWORD AND WARNING
[1] FOREWORD............................................... 3-1
[2] WARNING................................................... 3-1
[3] DANGER..................................................... 3-1
CHAPTER 4. PRODUCT DESCRIPTION
[1] SPECIFICATIONS ...................................... 4-1
CHAPTER 5. GENERAL INFORMATION
[1] GROUNDING INSTRUCTIONS.................. 5-1
[2] OVEN DIAGRAM ........................................ 5-1
CHAPTER 6. OPERATION
[1] DESCRIPTION OF OPERATING SEQUENCE .................................................... 6-1
[2] OVEN SCHENATIC .................................... 6-2
[3] DESCRIPTION AND FUNCTION OF
COMPONENTS .......................................... 6-3
CHAPTER 7. TROUBLESHOOTING GUIDE
[1] TROUBLESHOOTING CHART ................. 7-1
CHAPTER 8. TEST PROCEDURES
[1] A : MAGNETRON ASSEMBLY TEST ......... 8-1
[2] B : POWER TRANSFORMER TEST .......... 8-1
[3] C : HIGH VOLTAGE RECTIFIER TEST...... 8-1
[4] D : HIGH VOLTAGE CAPACITOR TEST..... 8-2
[5] E : THERMAL CUT-OUT (OVEN ) TEST..... 8-2
[6] E : TEMPERATURE FUSE (OVEN)
TEST........................................................... 8-2
[7] F : SECONDARY INTERLOCK SWITCH
TEST........................................................... 8-2
[8] F : PRIMARY INTERLOCK SYSTEM
TEST........................................................... 8-3
[9] G : MONITOR SWITCH TEST .................... 8-3
[10] H : BLOWN MINITOR FUSE TEST ............ 8-4
[11] I : NOISE FILTER TEST ............................ 8-4
[12] J : TOUCH CONTROL PANEL ASSEMBLY TEST ................................................... 8-4
[13]
[14]
[15]
[16]
K : KEY UNIT TEST.................................... 8-5
L : RELAY TEST ......................................... 8-6
M : DEFROST TEST................................... 8-6
N : FOIL PATTERN ON THE PRINTED
WIRING BOARD TEST............................... 8-6
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
[1] OUTLINE OF TOUCH CONTROL PANEL ............................................................... 9-1
[2] DESCRIPTION OF LSI ............................... 9-1
[3] SERVICING FOR TOUCH CONTROL
PANEL ........................................................ 9-3
CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER
[1] Employing lead-free solder ....................... 10-1
[2] Using lead-free wire solder ....................... 10-1
[3] Soldering................................................... 10-1
CHAPTER 11. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] WARNING..................................................11-1
[2] OUTER CASE REMOVAL .........................11-2
[3] MAGNETRON REMOVAL .........................11-2
[4] HIGH VOLTAGE COMPONENTS REMOVAL (HIGH VOLTAGE CAPACITOR
AND HIGH VOLTAGE RECTIFIER ASSEMBLY) ...................................................11-2
[5] POWER TRANSFORMER REMOVAL ......11-2
[6] POSITIVE LOCKR CONNECTOR (NOCASE TYPE) REMOVAL ...........................11-3
[7] CONTROL PANEL ASSEMBLY REMOVAL.......................................................11-3
[8] GRAPHIC SHEET AND MEMBRANE
SWITCH REPLACEMENT .........................11-3
[9] POWER SUPPLY CORD REPLACEMENT.........................................................11-4
[10] TURNTABLE MOTOR REMOVAL .............11-4
[11] COOLING FAN MOTOR REMOVAL..........11-4
[12] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL ..........................11-5
[13] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT ...................11-5
[14] DOOR REPLACEMENT ............................11-6
CHAPTER 12. CIRCUIT DIAGRAMS
[1] Pictorial Diagram (Figure S-1) .................. 12-1
[2] Control Panel Circuit (Figure S-2)............. 12-2
[3] Printed Wiring Board (Figure S-3)............. 12-3
Parts Guide
R230KW
Service
PRECAUTIONS TO BE OBSERVED BEFORE
AND Manual
DURING SERVICING TO AVOID
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
R230KW
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.
BEFOR SERVICING
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/cm2. The owner of the unit should be instructed not to use the unit
until the oven has been brought into compliance.
i
R230KW
Service Manual
CHAPTER 1. WARNING TO SERVICE PERSONNEL
R230KW
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
[2] When the testing is completed,
[1] Before Servicing
1. Disconnect the power supply cord, and then remove outer case.
1. Disconnect the power supply cord
case.
, and then remove outer
2. Open the door and block it open.
3. Discharge high voltage capacitor.
2. Open the door and block it open.
4. Reconnect the leads to the primary of the power transformer.
3. Discharge high voltage capacitor.
5. Reinstall the outer case (cabinet).
WARNING: RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGHVOLTAGE CAPACITOR BEFORE SERVICING.
6. Reconnect the power supply cord after the outer case is installed.
The high-voltage capacitor remains charged about 60 seconds after
the oven has been switched off. Wait for 60 seconds and then shortcircuit the connection of the high-voltage capacitor (that is the connecting lead of the high-voltage rectifier) against the chassis with the use
of an insulated screwdriver.
7. 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,
2. Reinstall the outer case (cabinet).
[3] After repairing
1. Reconnect all leads removed from components during testing.
3. Reconnect the power supply cord after the outer case is installed.
4. Run the oven and check all functions.
1) Disconnect the power supply cord, and then remove outer case.
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 re-examine the connections to the component being tested.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) 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.
When all service work is completed and the oven is fully assembled,
the microwave power output should be checked and microwave leakage test should be carried out.
6) After that procedure, reconnect the power supply cord.
1–1
R230KW
Service
Manual
CHAPTER 2. MICROWAVE MEASUREMENT
PROCEDURE
R230KW
[1] 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.
[2] 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±5 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.
[3] 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 and the primary interlock relay do turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
2–1
R230KW
CHAPTER 3. FOREWORD AND WARNINGService
R230KW
Manual
[1] FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP
MICROWAVE OVENS, R-230KK and R-230KW.
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.
[2] WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained service personnel.
[3] 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.
3–1
R230KW
R230KW
CHAPTER 4. PRODUCT DESCRIPTION
Service Manual
[1] SPECIFICATIONS
ITEM
Power Requirements
Power Consumption
Power Output
Case Dimensions
Cooking Cavity Dimensions
(0.8 Cubic feet)
Control Complement
Oven Cavity Light
Safety Standard
DESCRIPTION
120 Volts
60 Hertz
Single phase, 3 wire grounded
1170W / Approx. 10 Amperes
800 W nominal of RF microwave energy (IEC Test procedure)
Operating frequency 2450 MHz
Width 18-1/8" (460mm)
Height 10-7/8" (275mm)
Depth 14-1/8" (358mm)
NOTE: Internal capacity is calculated by measuring
Width 12-1/2" (319mm)
maximum width, depth and hight.
Height
8" (204mm)
Actual capacity for holding food is less.
Depth 13-1/4" (336mm)
Touch Control System
Clock (1:00 - 12:59)
Timer (0 - 99 minutes 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI -------------------P-90 -------------------P-80 -------------------P-70 -------------------P-60 -------------------P-50 -------------------P-40 -------------------P-30 -------------------P-20 -------------------P-10 -------------------P-0 ----------------------
Full power throughout the cooking time
approx. 90% of FULL Power
approx. 80% of FULL Power
approx. 70% of FULL Power
approx. 60% of FULL Power
approx. 50% of FULL Power
approx. 30% of FULL Power
approx. 40% of FULL Power
approx. 20% of FULL Power
approx. 10% of FULL Power
No power throughout the cooking time
POPCORN pad
SHORT CUTS pads
REHEAT pad
COOK pad
DEFROST pad
Number selection pads
TIMER / CLOCK pad
POWER LEVEL pad
START/MINUTE PLUS pad
STOP/CLEAR pad
Yes
UL Listed.
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
4–1
R230KW
Service Manual
R230KW
CHAPTER 5. GENERAL INFORMATION
[1] 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 115 -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. Where a twopronged 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 threepronged 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.
Grounded
Receptacle Box
3-Pronged
Plug
Grounding Pin
3-Pronged Receptacle
CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND
GROUNDING PRONG FROM THIS PLUG.
[2] OVEN DIAGRAM
1. OVEN
5
1. Door open button
Push to open door.
13
2. Oven door with see-through window
3. Safety door latches
4
The oven will not operate unless the door is
securely closed.
12
6
1
4. Door hinges
8
5. Door seals and sealing surfaces
6. Turntable motor shaft
3
2
11
10
3
7
9
7. Removable turntable support
Carefully place the turntable support in the
center of the oven floor.
8. Removable turntable
Place the turntable securely on the turntable support. The turntable will rotate clockwise or counterclockwise. Only remove for cleaning.
9. Ventilation openings (Rear)
10.Oven light
It will light when oven is operating.
11.Waveguide cover: DO NOT REMOVE.
12.Auto-Touch control panel
13.Time display: 99 minutes, 99 seconds
5–1
R230KW
2. TOUCH CONTROL PANEL
NOTE: Some one-touch cooking features such as "MINUTE PLUS" 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.
5–2
R230KW
Service Manual
R230KW
CHAPTER 6. OPERATION
[1] DESCRIPTION OF OPERATING SEQUENCE
The following is a description of component functions during oven operation.
1. OFF CONDITION
3. POWER LEVEL COOKING
Closing the door activates door sensing switch and secondary interlock switch. (In this condition, the monitor switch contacts are opened.)
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:
When oven is plugged in, 120 volts A.C. is supplied to the control unit.
through the noise filter (Figure O-1).
VARI-MODE
P-HI (100% power)
P-90 (approx. 90% power)
P-80 (approx. 80% power)
P-70 (approx. 70% power)
P-60 (approx. 60% power)
P-50 (approx. 50% power)
P-40 (approx. 40% power)
P-30 (approx. 30% power)
P-20 (approx. 20% power)
P-10 (approx. 10% power)
P-0 (0% power)
1) The display will show flashing "88:88".
2) To set any program or set the clock, touch the STOP/CLEAR pad.
The display will clear, and " : " will appear.
2. COOKING CONDITION
Program desired cooking time by touching the NUMBER pads. And
program the power level by touching the POWER LEVEL pad.
When the START pad is touched, the following operations occur:
1) 1.The contacts of the 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
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.
NOTE: The ON/OFF time ratio does not correspond with the percentage of microwave power, because approx. 3 seconds
are needed for heating of the magnetron filament.
CONNECTED COMPONENTS
oven lamp/turntable motor/fan motor
power transformer
4. POWER OUTPUT REDUCTION
2) 120 volts A.C. is supplied to the primary winding of the power transformer and is converted to about 3.35 volts A.C. output on the filament winding, and approximately 2000 volts A.C. on the high
voltage winding.
If the oven is set for more than 20 minutes at 80, 90 or 100% power
level, after the first 20 minutes the power level will automatically adjust
itself to 70% power to avoid overcooking.
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 feed-box, 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, monitor switch, door
sensing switch, secondary interlock switch and primary interlock
relay are activated with the following results. The circuits to the
oven lamp, turntable motor, the cooling fan motor, and the high voltage components are de-energized, and the digital read-out displays the time still remaining in the cook cycle when the door was
opened.
7) The monitor switch is electrically monitoring the operation of the
secondary interlock switch and primary interlock relay (RY2) and is
mechanically associated with the door so that it will function in the
following sequence.
a) When the door opens from the closed position, the secondary
interlock switch, door sensing switch and primary interlock relay
(RY2) open their contacts. Then the monitor switch contacts
close.
b) (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.
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, primary interlock relay (RY2) and secondary interlock switch,
causing the monitor fuse to blow.
6–1
R230KW
[2] OVEN SCHENATIC
1. Off Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY
THERMAL
CUT-OUT (OVEN)
NOTE: "
" indicates components with potentials above 250V
L
or
TEMPERATURE
FUSE (OVEN)
FUSE
15A
N.O.
POWER
TRANSFORMER
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
(RY-2)
(RY-1)
A3
PRIMARY
INTERLOCK
RELAY
CAPACITOR
0.82µF
AC2100V
or
AC1900V
CONTROL UNIT
A1
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
GRN
120V AC
60 Hz
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR
0.22µF / AC 250V
NOISE FILTER
COM.
B2
B1
DOOR
SENSING
SWITCH
TTM
OL
OVEN
LAMP
MONITOR
SWITCH
FM
TURNTABLE
MOTOR
RECTIFIER
MAGNETRON
FAN
MOTOR
N
SECONDARY
INTERLOCK
SWITCH
Figure O-1. Oven Schematic-Off Condition
2. Cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. VARIABLE COOKING CONTROL "P-HI".
4. START PAD TOUCHED.
THERMAL
CUT-OUT (OVEN)
NOTE: "
" indicates components with potentials above 250V
L
or
TEMPERATURE
FUSE (OVEN)
FUSE
15A
N.O.
POWER
TRANSFORMER
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
(RY-2)
(RY-1)
A3
PRIMARY
INTERLOCK
RELAY
CAPACITOR
0.82µF
AC2100V
or
AC1900V
CONTROL UNIT
A1
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
GRN
120V AC
60 Hz
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR
0.22µF / AC 250V
NOISE FILTER
COM.
B2
B1
DOOR
SENSING
SWITCH
TTM
OL
OVEN
LAMP
TURNTABLE
MOTOR
FM
FAN
MOTOR
N
SECONDARY
INTERLOCK
SWITCH
Figure O-2. Oven Schematic-Cooking Condition
6–2
MONITOR
SWITCH
RECTIFIER
MAGNETRON
R230KW
[3] DESCRIPTION AND FUNCTION OF COMPONENTS
1. DOOR OPEN MECHANISM
4. TURNTABLE MOTOR
The door is opened by pushing the open button on the control panel,
refer to the Figure D-1.
The turntable motor rotates the turntable located on the bottom of the
oven cavity, so that the food on the turntable is cooked evenly. The
turntable may turn in either direction.
When the open button is pushed, the open button pushes up the
switch lever, and then the switch lever pushes up the latch head. The
latch heads are moved upward and released from latch hook. Now the
door will open.
5. COOLING FAN MOTOR
The cooling fan motor drives a blade which draws external cool air.
This cool air is directed through the air vents surrounding the magnetron and cools the magnetron. This air is channelled through the oven
cavity to remove steam and vapours given off from the heating foods.
It is then exhausted through the exhausting air vents at the oven cavity.
Latch Hook
Door
6. TEMPERATURE FUSE (OVEN)
Door Sensing
Switch
Latch
Heads
The temperature fuse, 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 temperature fuse will open.
Under normal operation, the temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven
cavity, the temperature fuse will open at 302°F(150°C), causing the
oven to shut down.
Monitor Switch
Switch Lever
Secondary
Interlock Switch
7. THERMAL CUT-OUT (OVEN)
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 cutout will open.
Figure D-1. Door Open Mechanism.
2. DOOR SENSING AND SECONDARY INTERLOCK
SWITCHES
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 293°F(145°C), causing the oven to shut down.
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.
8. MONITOR FUSE
1) The monitor fuse blows when the contacts (COM-NO) of the primary interlock relay (RY2) and the secondary interlock switch
remain closed with the oven door open and when the monitor
switch closes.
3. MONITOR SWITCH
2) If the wire harness or electrical components are short-circuited, this
monitor fuse blows to prevent an electric shock or fire hazard.
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.
9. NOISE FILER
The noise filter prevents the radio frequency interference that might
flow back in the power circuit.
Functions:
1) When the door is opened, the monitor switch contacts close (to the
ON condition) due to their being normally closed. At this time the
primary interlock relay (RY2) and secondary interlock switch are in
the OFF condition (contacts open) due to its 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 secondary
interlock switch contacts close.
3) If the door is opened, and the primary interlock relay (RY2) and the
secondary interlock switch contact fail to open, the monitor fuse
blows simultaneously with closing of the monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST
THE DOOR SENSING SWITCH, PRIMARY INTERLOCK
RELAY (RY2), 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.
6–3
R230KW
CHAPTER 7. TROUBLESHOOTING GUIDEService
R230KW
Manual
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, primary interlock relay (RY2), door sensing switch and
secondary interlock switch before replacing the monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFSBA026WRKZ 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,
6) After that procedure, reconnect the power supply cord.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
3) Discharge high voltage capacitor.
4) Reconnect the leads to the primary of the power transformer.
4) Disconnect the leads to the primary of the power transformer.
5) Reinstall the outer case (cabinet).
5) Ensure that the leads remain isolated from other components and
oven chassis by using insulation tape.
6) Reconnect the power supply cord after the outer case is installed.
When the testing is completed,
1) Disconnect the power supply cord, and then remove outer case.
7) Run the oven and check all functions.
OFF
CONDITION
COOKING
CONDITION
I
NOISE FILTER
DEFROST
N M
FOIL PATTERN ON PWB.
MONITOR SWITCH
KEY UNIT (MEMBRAINE SWITCH
SECONDARY INTERLOCK SWIT
DIRTY OVEN CAVITY
PRIMARY INTERLOCK SYSTEM
LOW VOLTAGE
TEMPERATURE FUSE (OVEN)
or THERMAL CUT-OUT (OVEN)
7–1
WRONG OPERATION
HIGH VOLTAGE CAPACITOR
Home fuse blows when power cord is plugged
into wall receptacle.
Monitor fuse blows when power cord is plugged
into wall receptacle.
Any letters or 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 time of day should appear in display.)
Monitor fuse blows when the door is opened.
Fan motor does not operate. (All other electric
components function.)
Oven lamp does not light at all. (All other electric
components function.)
Turntable motor does not operate. (All other
electric components function.)
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 50% mode. (Operates properly on
Cooking Power 100% mode.)
Oven lamp, turntable motor and fan motor do not
operate.
Oven goes into DEFROST but food is not
defrosted well.
CONTROL UNIT or RELAY
G H RE RE CK J/L CK CK CK K
TURNTABLE MOTOR
F
COOLING FAN MOTOR
F
OVEN LAMP
E
MONITOR FUSE
D
H.V. RECTIFIER ASSEMBLY
PROBLEM
C
POWER TRANSFORMER
CONDITION
B
MAGNETRON
POSSIBLE CASE
AND DEFECTIVE PARTS
RE CK A
SHORT IN POWER CORD
TTEST PROCEDURE
SHORT OR OPENED WIRING
[1] TROUBLESHOOTING CHART
R230KW
Service Manual
R230KW
CHAPTER 8. TEST PROCEDURES
[1] Procedure A : MAGNETRON ASSEMBLY TEST
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. 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.
5. 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.
6. Reconnect all leads removed from components during testing.
7. Reinstall the outer case (cabinet).
8. Reconnect the power supply cord after the outer case is installed.
9. Run the oven and check all functions.
1. 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 P-HI (100% Power) 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 20 to 38°F(11.1 to 21.1°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.
[2] Procedure B : POWER TRANSFORMER TEST
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 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 202 ohms (RTRN-A727WRZZ) or 190 ohms (RTRN-A728WRZZ); the resistance of the filament coil should be less than 1 ohm.
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.
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH
VOLTAGE.)
[3] Procedure C : HIGH VOLTAGE RECTIFIER TEST
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. 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.
8–1
R230KW
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.
[4] Procedure D : HIGH VOLTAGE CAPACITOR TEST
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. 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.
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.
[5] Procedure E : THERMAL CUT-OUT (OVEN ) TEST
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. A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of the thermal cut-out reaches
approximately 293°F(145°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.
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 IT
[6] Procedure E : TEMPERATURE FUSE (OVEN) TEST
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. A continuity check across the temperature fuse terminals should indicate a closed circuit unless the temperature of the temperature fuse reaches
approximately 302°F(150°C).
An open temperature fuse indicates overheating of the oven, exchange the temperature fuse 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.
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 TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE IT
[7] Procedure F : SECONDARY INTERLOCK SWITCH TEST
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. 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.
8–2
R230KW
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.
[8] Procedure F : PRIMARY INTERLOCK SYSTEM TEST
1. DOOR SENSING SWITCH
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. 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.
2. PRIMARY INTERLOCK RELAY (RY2)
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 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.
[9] Procedure G : MONITOR SWITCH TEST
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. 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 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.
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.
SCREW
DR IV E R
GR Y
B LK
MONIT OR
S WIT C H
OHMME T E R
8–3
R230KW
[10] Procedure H : BLOWN MINITOR FUSE TEST
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. 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-BA026WRKZ, even if the monitor switch operates normally. The monitor fuse and monitor switch assembly is
comprised of a 15 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.
[11] Procedure I : NOISE FILTER TEST
1. Disconnect the power supply cord, and then remove outer case.
NOISE FILTER
N
2. Open the door and block it open.
L
FUSE 15A
3. Discharge high voltage capacitor.
LINE CROSS CAPACITOR
0.22µF / AC 250V
4. Disconnect the lead wires from the terminal the noise filter. Using an ohmmeter, check between
the terminals as described in the following table. If incorrect reading are obtained, replace the
noise filter.
NOISE SUPPRESSION COIL
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.
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
8. Run the oven and check all functions.
MEASURING POINT
Between N and L
Between terminal N and WHITE
Between terminal L and RED
INDICATION OF OHMMETER
Open circuit.
Short circuit.
Short circuit.
WHITE
LINE BYPASS
CAPACITOR
0.0033µF / AC 250V
RED
[12] Procedure J : TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper
maintenance cannot be performed with only a voltmeter and ohmmeter.
In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key 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) 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.
1. Key Unit
NOTE:
1) Check key unit ribbon connection before replacement.
2) )Re-install the outer case (cabinet).
3) Reconnect the power supply cord after the outer case is installed.
4) Run the oven and check all functions.
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.
8–4
R230KW
c) When touching the pads, sometimes a pad produces no signal.
If the key unit is defective.
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) Replace the key unit.
5) Reconnect all leads removed from components during testing.
6) Re-install the outer case (cabinet).
7) Reconnect the power supply cord after the outer case is installed.
8) Run the oven and check all functions.
2. Control Unit.
The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure K) to determine if
control unit is faulty.
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) 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.
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 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) 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.
[13] Procedure K : KEY UNIT TEST
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. Using an ohmmeter and referring to the key unit matrix indicated on the control unit circuit, check the circuit between the pins of the key unit that
correspond to the STOP/CLEAR pad. When the pad is pressed, the ohmmeter should indicate short circuit. When the pad is released, the ohmmeter should indicate open circuit. If incorrect readings are obtained, the key unit is faulty and must be replaced. About the other pads, the above
method may be used.
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.
8–5
R230KW
G1
G2
G3
G4
6
2
3
5
4
COOK
TIMER
CLOCK
0
1
SOFTEN
9
8
7
G5
G6
WARM REHEAT DEFROST
POWER
POPCORN LEVEL
STOP
CLEAR
START
MELT MINUTE PLUS
G7
Pin NO. G1
Pin NO. G10
Key unit ribbon
cable
G8
G9
G10
Key unit (Membrane Switch) front view
[14] Procedure L : RELAY TEST
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.
7. Remove the outer case and check voltage between Pin No. 1 of the 3 pin connector (A) and the normal open terminal of the relay RY2 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
RY1
RY2
OPERATIONAL VOLTAGE
Approx. 12.5V D.C.
Approx. 11.2V D.C.
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
8. If any abnormal condition is defected, replace the control unit.
9. Disconnect the power supply cord and then remove outer case.
10.Open the door and block it open.
11.Discharge high voltage capacitor.
12.Reconnect all leads removed from components during testing.
13.Re-install the outer case (cabinet).
14.Reconnect the power supply cord after the outer case is installed.
15.Run the oven and check all functions.
[15] Procedure M : DEFROST TEST
1. Place one cup of water in the center of the turntable tray in the oven cavity.
2. Close the door, touch the “DEFROST “ pad once.
3. The oven is in Defrost cooking condition.
4. The oven will operate as follows.
MENU
Steaks/
Chops
0.5lb
1ST STAGE
2ND STAGE
3RD STAGE
4TH STAGE
LEVEL
TIME
LEVEL
TIME
LEVEL
TIME
LEVEL
TIME
70%
1min 2sec.
0%
50sec.
50%
37sec.
30%
40sec.
5. If improper operation is indicated, the control unit is probably defective and should be checked.
[16] Procedure N : 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) Discharge high voltage capacitor.
8–6
R230KW
4) Follow the troubleshooting guide given below for repair.
STEPS
1
2
OCCURRENCE
Only pattern at “a” is broken.
Pattern at “a” and “b” are broken.
CAUSE OR CORRECTION
*Insert jumper wire J1 and solder.
*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 915Ω±10%). If any abnormal condition is detected,
replace the control unit.
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.
d
9) Run the oven and check all functions.
a
2. Follow the troubleshooting guide given below, if indicator does not light up after above
check and repairs are finished.
c
b
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.
7) Follow the troubleshooting guide given below for repair.
STEPS
1
2
OCCURRENCE
The rated AC voltage is not present between Pin No. 1 of the 3-pin connector (A) and the normal open terminal of the relay RY2
The rated AC voltage is present at primary side of low voltage transformer.
8) Disconnect the power supply cord and then remove outer case.
9) Open the door and block it open.
10)Discharge high voltage capacitor.
11)Reconnect all leads removed from components during testing.
12)Re-install the outer case (cabinet).
13)Reconnect the power supply cord after the outer case is installed.
14)Run the oven and check all functions.
8–7
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
Low voltage transformer or secondary circuit defective.
Check and replace control unit.
R230KW
Service Manual
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
R230KW
[1] OUTLINE OF TOUCH CONTROL PANEL
This circuit consists of 4-digits, 12-segments and 3-common electrodes using a Liquid Crystal Display.
The touch control section consists of the following units as shown in
the touch control panel circuit.
(1) Key Unit
3) Power Source Circuit
This circuit generates voltage 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.
(2) Control Unit
The principal functions of these units and their related signals are
explained below.
Symbol
VSS
1. Key Unit
The key unit is composed of a matrix, signals generated in the LSI are
sent to the key unit through P24, P25, P26, P31, P32 and P33. When
a key pad is touched, a signal is completed through the key unit and
passed back to the LSI through P50, P51, P52 and P53 to perform the
function that was requested.
Voltage
-5V
Application
LSI(IC1)
4) Relay 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).
2. Control Unit
Control unit consists of LSI, reset circuit, indicator circuit, power
source circuit, relay circuit, buzzer circuit and synchronizing signal 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) Reset Circuit
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
[2] DESCRIPTION OF LSI
The I/O signal of the LSI are detailed in the following table.
Pin No.
1
Signal
P50
I/O
IN
2
P51
IN
3
P52
IN
4
P53
IN
5
6
7
8
IC
XT1
XT2
VDD
IN
IN
9
VSS
IN
10
X1
IN
11
X2
OUT
12
RESET
IN
13-15
16
17
18
19-21
P00-P02
P03
CAPH
CAPL
VLC0-VLC2
OUT
OUT
IN
22
COM0
OUT
23
COM1
OUT
IN
Description
Signal coming from touch key.
When either G7 line on key matrix is touched, a corresponding signal out of P24 - P26 and P31 - P33 will be
input into P50. When no key is touched, the signal is held at "H" level.
Signal similar to P50.
When either G8 line on key matrix is touched, a corresponding signal will be input into P51.
Signal similar to P50.
When either G9 line on key matrix is touched, a corresponding signal will be input into P52.
Signal similar to P50.
When either G10 line on key matrix is touched, a corresponding signal will be input into P53.
Connected to VSS.
Connected to VSS.
Terminal not used.
Power source voltage input terminal.
The power source voltage to drive the LSI. Connected to GND.
Power source voltage input terminal.
The power source voltage to drive the LSI.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the resistor-capacitor oscillation circuit with respect to X2 terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of X1.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied.
Terminal not used.
Terminal not used.
Terminal not used.
Terminal not used.
Power source voltage input terminal.
Standard voltage for LCD.
Common data signal.
Connected to LCD signal COM0.
Common data signal.
Connected to LCD signal COM1.
9–1
R230KW
Pin No.
24
Signal
COM2
I/O
OUT
25
26-37
COM3
SEG0-SEG11
OUT
OUT
38-40
41
SEG12-SEG14
P70
OUT
OUT
Description
Common data signal.
Connected to LCD signal COM2.
Terminal not used.
Segment data signal.
Connected to LCD.The relation between signals are as follows:
LSI signal (Pin No.)
LCD (segment)
LSI signal (Pin No.)
LCD (segment)
SEG 0 (26) ----------------- SEG 1
SEG 0 (32) ----------------- SEG 7
SEG 0 (27) ----------------- SEG 2
SEG 0 (33) ----------------- SEG 8
SEG 0 (28) ----------------- SEG 3
SEG 0 (34) ----------------- SEG 9
SEG 0 (29) ----------------- SEG 4
SEG 0 (35) ----------------- SEG 10
SEG 0 (30) ----------------- SEG 5
SEG 0 (36) ----------------- SEG 11
SEG 0 (31) ----------------- SEG 6
SEG 0 (37) ----------------- SEG 12
Terminal not used.
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The square wave16.7 msec.
form voltage is delivered to the RY1 driving circuit and
RY2 control circuit.
H : GND
L : -5V
During cooking
42
43
P71
P72
OUT
OUT
Terminal not used.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The signals
holds "L" level during microwave cooking and “H” level
while not cooking. In other cooking modes (variable
cooking) the signal turns to “H” level and “L” level in
repetition according to the power level.
OFF
Maximum
output
H : GND
ON
OFF
70% of maximum
output
44
AVDD
IN
45-47
AIN5-AIN3
IN
48-50
51
AIN2-AIN0
AVSS
IN
IN
52
P11
IN
53
54
P10
P33
OUT
OUT
55
P32
OUT
56
P31
OUT
57
INTP0
IN
OFF
24 sec.
ON
8 sec.
L : -5V
H : GND
L : -5V
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
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.
This is the terminal to detect the voltage of the signal coming from the touch key.
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI.
To input signal which communicates the door open/close information to LSI.
Door close “H” level signal (0V). Door open “L” level signal (-5V)
Terminal not used.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G1
line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G2
line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G3
line keys on key matrix is touched.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
H : GND
L : -5V
16.7 msec.
58
P26
OUT
59
P25
OUT
60
P24
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G4
line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G5
line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G6
line keys on key matrix is touched.
9–2
R230KW
Pin No.
61
62
63
Signal
P23
P22
BZO90
I/O
OUT
OUT
OUT
Description
Terminal not used.
Terminal not used.
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
64
P20
OUT
Terminal not used.
[3] SERVICING FOR TOUCH CONTROL PANEL
1. Precautions for Handling Electronic Components
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.
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.
b) On some models, the power supply cord between the touch
control panel and the oven proper is so long enough that
they may be separated from each other. For those models,
therefore, it is possible to check and repair the controls of the
touch control panel while keeping it apart from the oven
proper; in this case you must short both ends of the door
sensing switch (on PWB) of the touch control panel with a
jumper, which brings about an operational state that is equivalent to the oven door being closed. As for the sensorrelated controls of the touch control panel, checking them is
possible if the dummy resistor(s) with resistance equal to
that of the controls are used.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them in aluminium
foil. Also wrap PW boards containing them in aluminium foil.
2) When soldering, ground the technician as shown in the figure and
use grounded soldering iron and work table.
approx. 1M ohm
2. Servicing the touch control panel with power supply from an external power source:
Disconnect the touch control panel completely from the oven
proper, and short both ends of the door sensing switch (on PWB) of
the touch control panel, which brings about an operational state
that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control
panel, then it is possible to check and repair the controls of the
touch control panel; it is also possible to check the sensor-related
controls of the touch control panel by using the dummy resistor(s).
2. 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 .
3. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 30W
Therefore, before checking the performance of the touch control
panel,
(It is recommended to use a soldering iron with a grounding terminal.)
1) Disconnect the power supply cord and then remove outer case.
2) Oscilloscope: Single beam, frequency range: DC - 10MHz type or
more advanced model.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
3) Others: Hand tools
4) Disconnect the leads to the primary of the power transformer.
4. Other Precautions
5) Ensure that these leads remain isolated from other components
and oven chassis by using insulation tape.
1) Before turning on the power source of the control unit, remove the
aluminium foil applied for preventing static electricity.
6) After that procedure, re-connect the power supply cord.
After checking the performance of the touch control panel,
2) Connect the connector of the key unit to the control unit being sure
that the lead wires are not twisted.
1) Disconnect the power supply cord.
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.
2) Open the door and block it open.
3) Re-connect the leads to the primary of the power transformer.
4) Re-install the outer case (cabinet).
4) Attach connectors, electrolytic capacitors, etc. to PWB, making
sure that all connections are tight.
5) Re-connect the power supply cord after the outer case is
installed.
5) Be sure to use specified components where high precision is
required.
6) Run the oven and check all functions.
9–3
R230KW
Service
Manual SOLDER
CHAPTER 10. PRECAUTIONS FOR USING
LEAD-FREE
R230KW
[1] Employing lead-free solder
The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder.
Example:
Indicates lead-free solder of tin, silver and copper
[2] Using lead-free wire solder
When repairing a PWB with the "LF" symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder may result in cold soldered
joints and damage to printed patterns.)
As the melting point of lead-free solder is approximately 40°C higher than tin/lead alloy solder, it is recommend that a dedicated bit is used, and that
the iron temperature is adjusted accordingly.
[3] Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability, (flow), to prevent damage to the land of the PWB, extreme
care should be taken not to leave the bit in contact with the PWB for an extended period of time. Remove the bit as soon as a good flow is achieved.
The high content of tin in lead free solder will cause premature corrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the
iron when it is not required.
Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their characteristics, making good soldering
more difficult. It will be necessary to clean and replace bits more often when using lead-free solder. To reduce bit wear, care should be taken to clean
the bit thoroughly after each use.
10 – 1
R230KW
Service AND
Manual ADJUSTMENT PROCECHAPTER 11. COMPONENT REPLACEMENT
R230KW
DURE
[1] WARNING
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. Make sure that a definite "click" can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch leads to rise, it
is then possible to hear a "click" as the door switches
operate.)
3. Visually check the door and cavity face plate for damage
(dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before operating the oven.
Do not operate the oven if any of the following conditions exist;
1. Door does not close firmly.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
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) Discharge the high voltage capacitor and wait for 60
seconds.
2. DonÕt 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, Power transformer and Oven
cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange and
other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Turntable motor, Switch, Switch
lever, Open button.
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:
11 – 1
R230KW
[2] OUTER CASE REMOVAL
To remove the outer case, procedure as follows.
1. Disconnect the power supply cord.
2. Open the oven door and block it open.
3. Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100 screw driver.
4. Remove the remaining three (3) screws from the upper portion of
the rear and two (2) screws along the right side of outer case.
5. 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
6. Lift entire outer case from the unit.
CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE
REMOVING OUTER CASE.
DISCHARGE THE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN COMPONENTS OR
WIRING.
Screw Driver
(Type: TORX T20 H or
GTXH20-100)
NOTE: When replacing the outer case, the 2 special Torx screws
must be reinstalled in the same locations.
[3] MAGNETRON REMOVAL
1. Disconnect the power supply cord and remove outer case.
7. Remove the four (4) screws holding the magnetron to the
waveguide.
2. Open the oven door and block it open.
8. Remove the magnetron from waveguide.
3. Discharge high voltage capacitor.
9. Now, the magnetron is free.
4. Remove the two (2) screws holding the air duct to the oven cavity.
CAUTION: WHEN REPLACING THE MAGNETRON, BE SURE THE
R.F. GASKET IS IN PLACE AND THE MAGNETRON
MOUNTING SCREWS ARE TIGHTENED SECURELY.
5. Release the air duct from the oven cavity.
6. Disconnect the wire leads from magnetron.
[4] HIGH VOLTAGE COMPONENTS REMOVAL (HIGH VOLTAGE CAPACITOR AND HIGH
VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
8. Remove one (1) screw holding ground side terminal of high voltage
rectifier assembly, and remove capacitor holder.
1. Disconnect the power supply cord and remove outer case.
9. Disconnect the terminal of high voltage rectifier assembly from high
voltage capacitor.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
10.Now the H.V. rectifier assembly and H.V. capacitor should be free.
4. Disconnect the high voltage wire (white) of the power transformer
from high voltage capacitor.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
ASSEMBLY, ENSURE THAT THE CATHODE (GROUND)
CONNECTION IS SECURELY FIXED TO THE CAPACITOR HOLDER WITH A GROUNDING SCREW.
5. Disconnect the H.V. wire of the H.V. rectifier assembly from the
magnetron.
6. Disconnect the filament lead (red) of the power transformer from
the H.V. capacitor.
CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE RECTIFIER.
WHEN REPLACING IT, REPLACE HIGH VOLTAGE RECTIFIER ASSEMBLY.
7. Remove one (1) screw holding capacitor holder to bottom plate.
[5] POWER TRANSFORMER REMOVAL
1. REMOVAL
9. Now the power transformer is free.
1. Disconnect the power supply cord and remove outer case.
2. REINSTALL
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
1. Rest transformer on the bottom plate with its primary terminals
toward the oven face plate.
4. Disconnect the wire leads (main wire harness) from power transformer.
2. Secure transformer with four (4) screws to the bottom plate ( two
screws from upper side and two screws from bottom side).
5. Disconnect the filament lead (red) of the power transformer from
magnetron.
3. Re-connect wire leads (primary and high voltage) and filament
leads to the power transformer, magnetron and high voltage capacitor, referring to "Pictorial Diagram".
6. Disconnect the leads of the power transformer from high voltage
capacitor.
4. Re-install outer case and check that the oven is operating properly.
7. Remove the four (4) screws holding the transformer to bottom plate
from the upper side and bottom side.
8. Remove the transformer.
11 – 2
R230KW
[6] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
1. Disconnect the power supply cord, and remove outer
case.
Positive lock¨
connector
2. Open the door and block it open.
1
3. Discharge high voltage capacitor.
Push
4. Push the lever of positive lock connector.
Lever
5. Pull down on the positive lock connector.
CAUTION: WHEN CONNECTING THE POSITIVE LOCK
CONNECTORS
TO
THE
TERMINALS,
INSTALL THE POSITIVE LOCK SO THAT
THE LEVER FACES YOU
2
Pull down
Figure C-1. positive lock connector
[7] CONTROL PANEL ASSEMBLY REMOVAL
1. Disconnect the power supply cord and remove outer case.
4. Disconnect the leads from the control unit.
2. Open the door and block it open.
5. Remove the one (1) screw holding the control panel to the front
plate of the oven cavity.
3. Discharge high voltage capacitor.
6. Now, the control panel assembly is free.
[8] GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT
1. REMOVAL
6. Tear the backing paper from the new graphic sheet.
1. Disconnect the power supply cord and then remove outer case.
7. Adjust the upper edge and left edge of the graphic sheet to the
large depression on the surface of the control panel frame.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
8. Attach the graphic sheet to the control panel frame by rubbing with
a soft cloth not to scratch.
4. Remove the control panel assembly, referring to chapter of CONTROL PANEL ASSEMBLY REMOVAL.
9. Tear the small backing paper from the ribbon cable of the membrane switch.
5. Remove the two (2) screws holding the control unit to the control
panel frame. And remove the control unit.
10.Attach the ribbon cable to the control panel frame rear side.
11. Place the edge of the membrane switch’s ribbon cable on the lower
portion of the liquid crystal display.
6. Remove the rubber connector from the long slit on the control panel
frame.
12.Insert the rubber connector into the long slit on the control panel
frame.
7. Tear away the graphic sheet from the control panel frame.
8. Tear away the membrane switch from the control panel frame.
13.Reinstall the control unit to the control panel frame with the two (2)
screws.
2. REINSTALL
NOTE: Do not contact the contact surface of the ribbon cable
(edge) and the rubber connector directly with your fingers. This is to avoid oxidized. If display digits are missing or scrambled, remove control unit and clean contact
surface with alcohol. After cleaning, do not attach the rubber connector until alcohol dries up. Do not use alcohol
or solution to clean the rubber connector. Make sure that
there is no trash or foreign substance on contact surface
of the rubber connector.
1. Remove remaining adhesive on the control panel frame surfaces
with a soft cloth soaked in alcohol.
2. Tear the backing paper from the new membrane switch.
3. Insert the ribbon cable of the membrane switch into the slit of the
control panel frame.
4. Adjust the upper edge and right edge of the membrane switch to
the small depression on the surface of the control panel frame.
5. Attach the membrane switch to the control panel frame by rubbing
with a soft cloth not to scratch.
Control panel frame
Large
depression
Liquid crystal
display
Small
backing
paper
Control panel frame
(Rear side)
Long slit
Slit
Contact surface
Ribbon
cable
Ribbon cable
of membrane
switch
Small
depression
Graphic
sheet
Membrane
switch
Figure C-2. Graphic Sheet and Membrane Switch Replacement
11 – 3
Rubber connector
R230KW
[9] POWER SUPPLY CORD REPLACEMENT
1. REMOVAL
7. Now, the power supply cord is free.
1. Disconnect the power supply cord, and remove outer case.
2. REINSTALL
2. Open the door and block it open.
3. Discharge high voltage capacitor.
1. Insert the moulding cord stopper of power supply cord into the
square hole of the rear cabinet, referring to the Figure C-3 (b).
4. Remove the single (1) screw holding the green wire to the oven
cavity back plate.
2. Install the earth wire lead of power supply cord to the oven cavity
back plate with one (1) screw and tight the screw.
5. Disconnect the leads of the power supply cord from the noise filter,
referring to the Figure C-3(a).
3. Connect the gray wire leads of power supply cord to the noise filter
correctly, referring to the Pictorial Diagram.
6. Release the moulding cord stopper of the power supply cord from
the square hole of the oven cavity back plate, referring to the Figure C-3(b).
4. Re-install outer case and check that the oven is operating properly.
Screw
Power Supply
Cord
Oven Cavity
Back Plate
Power Supply
Cord
L
Green Wire
WHT RED
Moulding
Cord Stopper
Oven Cavity
Back Plate
N
Gray Wire
GrayWire
Noise Filter
Square
Hole
Connect the wire lead which has the black case to
the terminal "L" of the noise filter.
Figure C-3(a) Power Supply Cord Replacement
Figure C-3(b) Power Supply Cord Replacement
[10] TURNTABLE MOTOR REMOVAL
1. REMOVAL
2. Re-install the turntable motor with the TTM packing with the single
(1) screw to the oven cavity bottom plate.
1. Disconnect the power supply cord.
3. Re-connect the wire leads to the turntable motor.
2. Remove turntable and turntable support from oven cavity.
4. Insert the tab of the turntable motor cover into the hole of the bottom plate.
3. Lay the oven on it's backside. Remove the turntable motor cover by
snipping off the material in four corners.
5. Re-install the turntable motor cover to the bottom plate with one (1)
screw.
4. Where the corners have been snipped off bend corner areas flat.
No sharp edges must be evident after removal of the turntable
motor cover.
TTM packing
5. Disconnect wire leads from turntable motor.
(See "Positive lock connector removal")
6. Remove one (1) screw holding turntable motor to oven cavity.
Turntable motor
7. Remove the TTM packing from the turntable motor.
8. Now, the turntable motor is free.
2. REINSTALL
Figure C-4. TTM packing Installation
1. Re-install the TTM packing.
[11] COOLING FAN MOTOR REMOVAL
1. REMOVAL
7. Hold the edge of the rotor of the fan motor by using a pair of groove
joint pliers.
1. Disconnect the power supply cord and remove outer case.
CAUTION: MAKE SURE THAT ANY PIECES DO NOT ENTER THE
GAP BETWEEN THE ROTOR AND THE STATOR OF THE
FAN MOTOR. BECAUSE THE ROTOR IS EASY TO BE
SHAVEN BY PLIERS AND METAL PIECES MAY BE PRODUCED.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the wire leads from the fan motor.
5. Remove the two (2) screws holding the fan motor to the oven cavity
back plate.
DO NOT TOUCH THE PLIERS TO THE COIL OF THE
FAN MOTOR BECAUSE THE COIL MAY BE CUT OR
INJURED.
6. Remove the fan blade from the fan motor shaft according to the following procedure.
DO NOT DISFIGURE THE BRACKET BY TOUCHING
WITH THE PLIERS.
11 – 4
R230KW
3. Apply the screw lock tight into the hole (for shaft) of the fan blade.
8. Remove the fan blade assembly from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
9. Now, the fan blade will be free.
4. Install the fan blade to the shaft of fan motor by pushing the fan
blade with a small, light weight, ball peen hammer or rubber mallet.
CAUTION: DO NOT RE-USE THE REMOVED FAN BLADE
BECAUSE THE HOLE (FOR SHAFT) MAY BE LARGER
THAN NORMAL.
CAUTION: DO NOT HIT THE FAN BLADE STRONGLY WHEN
INSTALLED BECAUSE THE BRACKET MAY BE TRANSFORMED.
MAKE SURE THAT THE FAN
SMOOTH AFTER INSTALLED.
10.Now, the fan motor is free.
2. INSTALLATION
BLADE
ROTATES
MAKE SURE THAT THE AXIS OF THE SHAFT IS NOT
SLANTED.
1. Install the fan blade to the fan motor shaft according to the following
procedure.
5. Install the fan motor assembly to the oven cavity back plate with
two (2) screws.
2. Hold the center of the bracket which supports the shaft of the fan
motor on the flat table.
6. Connect the wire leads to the magnetron and fan motor, referring to
the pictorial diagram.
Coil
Shaft
Groove joint pliers
Shaft
Axis
Stator
Gap
Bracket
These are the positions
that should be pinched
with pliers.
Stator
Rotor
Rear View
Table
Rotor
Side View
Center of
bracket
[12] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH
REMOVAL
1. REMOVAL
2. REINSTALL
1. Disconnect the power supply cord and remove outer case.
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. Open the door and block it open.
3. Discharge high voltage capacitor.
2. Secure latch hook (with two (2) mounting screws) to oven flange.
4. Remove the control panel assembly, referring to section of CONTROL PANEL ASSEMBLY REMOVAL.
3. Re-connect wire leads to each switch. Refer to pictorial diagram.
5. Remove the switch lever from the oven cavity.
4. Install the switch lever to the oven cavity.
5. Reinstall the control panel assembly to the oven cavity.
6. Disconnect wire leads from the switches.
6. Reconnect wire leads to the control unity, referring to the pictorial
diagram.
7. Remove two (2) screws holding latch hook to oven flange.
8. Remove latch hook assembly from oven flange.
7. Make sure that the monitor switch is operating properly and check
continuity of the monitor circuit. Refer to chapter "Test Procedure"
and Adjustment procedure.
9. Push outward on the two (2) retaining tabs holding switch in place.
10.Switch is now free.
[13] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH
ADJUSTMENT
1. Adjustment
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.
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
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.
6. Secure the screws with washers firmly.
4. Loosen the two (2) screws holding latch hook to the oven cavity
front flange.
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.
11 – 5
R230KW
2. After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in the
latched position. First check upper position of latch hook, pushing
and pulling upper portion of door toward the oven face. Then check
lower portion of the latch hook, pushing and pulling lower portion of
the door toward the oven face. Both results (play in the door)
should be less than 0.5mm.
Latch Hook
Door
Door Sensing
Switch
Latch
Heads
2. The door sensing switch and secondary interlock switch interrupt
the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage around
door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
Monitor Switch
Switch Lever
Secondary
Interlock Switch
Figure C-5. Latch Switch Adjustments
[14] DOOR REPLACEMENT
1. REMOVAL
16.Now, door screen is free.
1. Disconnect the power supply cord.
2. REINSTALL
2. Open the door slightly.
1. Re-install door screen to door frame.
3. Insert a putty knife (thickness of about 0.5mm) into the gap
between the choke cover and corner portion of door panel as
shown in Figure C-6 to free engaging parts.
2. Re-install latch spring to the head. Re-install latch spring to the
door frame. Re-install latch head to the door frame.
4. Pry the choke cover by inserting a putty knife in order shown in figure C-6.
3. Re-install door panel to door frame by fitting ten (10) tabs of door
frame to ten (10) holes of door panel.
5. Release choke cover from door panel.
4. Put sealer film on door panel. Refer to "Sealer Film" and figure C-8,
on how to handle the new film.
6. Now choke cover is free.
5. Catch two (2) pins of door panel on two (2) hole of upper and lower
oven hinges.
NOTE: When carrying out any repair to the door, do not bend or
warp the slit choke (tabs on the door panel assembly) to
prevent microwave leakage.
6. Re-install choke cover to door panel by pushing.
NOTE: After any service to the door;
1) Make sure that door sensing switch, secondary interlock
switch and monitor switch are operating properly. (Refer to
chapter "Test Procedures".).
Choke Cover
2) An approved microwave survey meter should be used to
assure compliance with proper microwave radiation emission
limitation standards.
3. 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.
Door Frame
Putty Knife
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.
Figure C-6. Door Disassembly
4. Check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
7. Release two (2) pins of door panel from two (2) holes of upper and
lower oven hinges by lifting up.
8. Now, door panel is free from oven cavity.
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.
9. Release door panel from ten (10) tabs of door frame and remove
door frame by sliding the door panel downward.
10.Now, door panel with sealer film is free.
11.Tear sealer film from door panel.
12.Now, door panel is free.
13.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head.
14.Now, latch head and latch spring are free.
15.Remove door screen from door frame.
11 – 6
R230KW
4. SEALER FILM
Pin
1. Put the adhesive tape on the backing film of the sealer film as
shown in Fig. C-8
Upper
Oven Hinge
2. Tear the backing film by pulling the adhesive tape.
Upper Oven
Hinge
3. Put the pasted side of the sealer film on the door panel
Sealer film
Backing film
Adhesive tape
Slit choke of
door panel
Lower
Oven Hinge
Figure C-8. Sealer film
Lower Oven
Hinge
Pin
Choke Cover
Figure C-7. Door Replacement
11 – 7
R230KW
CHAPTER 12. CIRCUIT DIAGRAMS
B LK
T1
C ONT R OL P ANE L
2
1
C N-B
R Y 2 P R IMAR Y
INT E R LOC K
R E LAY
N.O.
C OM.
GR N
GR N
C N-B
2 GR Y
1 GR N
GR N
GR Y
GR Y
GR Y
N.O.
DOOR
S E NS ING S WIT C H
C OM
C N-A
3 RED
2
1 GR Y
B LK
N.C .
C OM
GR Y
WHT
RED
OR G
T E MP E R AT UR E
F US E (OV E N)
TURNTABLE
MOTOR
GRY
GRY
G
R
N
Screw
GRY
WHT
Power Supply
Cord
GRY
FUSE
GRY
Oven Cavity
Back Plate
WHT
ORG
WHT
RED
Noise Filter
WHT RED
(WHT)
H.V. RECTIFIER
MAGNETRON
(RED)
HIGH VOLTAGE
CAPACITOR
HIGH VOLTAGE COMPONENTS
FAN MOTOR
Connect the wire lead
which has the black case
to the terminal "L" of the
noise filter.
RED
ORG
OVEN LAMP
RED
GRY
L
POWER
TRANSFORMER
12 – 1
RED
OR G
3
C N-A
1
MONIT OR
S WIT C H
N.O.
C OMN.O.
B LU
S E C ONDAR Y
INT E R LOC K S WIT C H
C OM
RED
RED
BLU
Figure S-1. Pictorial Diagram
R Y1
N
(RED)
Service Manual
R230KW
[1] Pictorial Diagram (Figure S-1)
Figure S-2. Control Panel Circuit
12 – 2
NO
A3
A1
CN-B
B2P-VH-B
DOOR
SW.
B2
B1
COM
POWER
TRANSFORMER
AC
OVEN LAMP
TERNTABLE
MOTOR
FAN MOTOR
AC120V
60HZ
AC
< POWER UNIT >
RY2
DU12D1-1P(M)-R
D20
MC2836
-
+
Q21
DTD143ES
-
470uF/25V
10uF/35V
+
910 1/2W
R4
NOTE
D40
MC2836
Q22
DTA123JS
-
+
DOOR
M
COM
BZ
VR
INT
-5V
C1
R30
(J14)
(J15)
AIN3
(J10)
(J11)
15K
R41
0.1uF / 25V
Q20
DTA143EKA
C20
Q30
DTA143EKA
0.1uF/25V
C10
AIN5
< LSI UNIT >
Q10
DTA143EKA
R5
ZD1
UDZ4.3B
VRS1
10G471K
a
C8
SP1
GND
0.1uF/25V
3.3K
Q1
2SA1037AK
1K
R10
d
c (J1) b
RY1
G5NB-1A12VDC
D4
R40
CN-A
B2(5.0)B-XA
D2
1
7
2
5
0
8
6
3
TIMER
CLOCK
9
COOK
SOFTEN
IC-1
G5
G6
MELT
MINUTE PLUS
POWER
LEVEL
STOP
CLEAR
START
REHEAT DEFROST
POPCORN
< KEY UNIT >
4
G4
WARM
49
G3
G1
32
33
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
P70
P71
P72
AVDD
AIN5
AIN4
AIN3
AIN2
48
G10
G9
G8
G7
64
16
P03
P02
P01
P00
RESET
X2
X1
VSS
VDD
XT2
XT1
IC
P53
P52
P51
P50
1
17
ON DEF. LBS. QTY. CHECK
LIQUID CRYSTAL DISPLAY
G2
15K
T1
PA142DR
C11
0.01uF/50V
15K
C4
R6
0.01uF/50V
D1 - D4 1N4002LX4
D3
4.7K
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
(J12)
(J13)
C40
C2
C21
AIN4
0.01uF
50V
COM2
COM1
COM0
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
COM1
COM0
VLC2
VLC1
VLC0
CAPL
CAPH
AIN1
AIN0
AVSS
P11
P10
P33
P32
P31
INTP0
P26
P25
P24
P23
P22
BZO90
P20
C3
0.1uF
25V
C50-C53
330P/50V x 4
C53
C52
C51
C50
R53
R52
R51
R50-R53
220K x 4
R50
C60
22pF/50V
R60
11KF
R7
R8
R9
4.7K
4.7K
4.7K
D1
R230KW
[2] Control Panel Circuit (Figure S-2)
220uF/10V
R230KW
[3] Printed Wiring Board (Figure S-3)
Figure S-3. Printed Wiring Board
12 – 3
R230KW
PARTS LIST
MICROWAVE OVEN
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
R-230KK
R-230KW
MODEL
Parts marked "*" may cause undue microwave exposure.
Parts marked " " are used in voltage more than 250V.
CONTENTS
[1] OVEN PARTS
PANEL PARTS
„ INDEX
[2] DOOR AND CONTROL
TOP PAD ASSEMBLY
FPADBA585WRKZ
POLYETHYLENG BAG
SSAKHA014WRE0
DOOR PROTECTION SHEET
CABINET COVER for R-230KW
SPADPA580WRE0
SPADFA449WRE0
PLASTIC SHEET for R-230KK
6-5 INSTRUCTION BOOK
6-1 TURNTABLE TRAY
SPADPA615WREZ
MICROWAVE OVEN
BOTTOM PAD ASSEMBLY
FPADBA586WRKZ
FOAM SHEET for R-230KK
SPAKHA014WREZ
INTO THE
OVEN CAVITY
6-2 TURNRTABLE SUPPORT
Not replaceable items.
PACKING CASE
FPAK-A531WRKZ [R-230KK]
FPAK-A530WRKZ [R-230KW]
TRAY PAD ASSY
(CPADBA287WRKZ)
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
R230KW
[1] OVEN PARTS
7-8
7-3
2-1
7-8
7-8
7-3
4-6
7-6
7-6
7-8
1-8
7-9
4-9
7-1
1-10
4-11
7-9
1-3
1-2
7-1
7-7
7-6
6-4
1-12
4-4
7-2
4-5
7-6
7-8
4-14
6-3
4-12
7-2
4-8
1-7
6-1
1-6
7-4
4-1
4-10
7-1
4-3
1-1
4-7
1-9
1-2
7-7
7-5
1-1
6-2
1-11
4-2
1-4
2-2
7-1
7-8
2-3
7-2
7-8
7-8
2-3
2
1-5
4-13
R230KW
NO.
PARTS CODE
PRICE NEW PART
RANK MARK RANK
DESCRIPTION
[1] OVEN PARTS
!
!
!
!
!
!
*
!
*
!
!
1-1
1-1
1-1
1-2
1-3
1-3
1-4
1-5
1-5
1-5
1-5
1-6
1-6
1-6
1-7
QSW-MA085WRE0
QSW-MA137WRE0
QSW-MA147WRZZ
FFS-BA026WRKZ
FACCDA107WREZ
FACCDA108WREZ
FH-DZA114WRKZ
RC-QZA328WRZZ
RC-PZA041WRE0
RC-QZA307WRZZ
RC-QZA327WRZZ
RMOTEA433WRZZ
RMOTEA346WRE0
RMOTEA356WRE0
RV-MZA338WRZZ
AF
AH
AG
AN
AU
-AR
AS
AS
AX
AT
AX
AV
-BH
1-7
1-8
1-8
1-8
1-9
1-9
1-9
1-10
1-10
1-10
1-11
1-11
1-12
RV-MZA339WRZZ
RLMPTA087WRZZ
RLMPTA082WRZZ
RLMPTA085WRZZ
RMOTDA264WRZZ
RMOTDA252WRZZ
RMOTDA186WRE0
QFS-TA014WRE0
RTHM-A075WRE0
RTHM-A119WRE0
RTRN-A727WRZZ
RTRN-A728WRZZ
FPWBFA385WRKZ
-AL
AL
AL
AT
AN
AW
AG
AN
AK
BF
BF
AV
2-1
2-1
2-2
2-3
GCABUA958WRPZ
GCABUA960WRPZ
GDAI-A377WRWZ
GLEGPA104WREZ
BE
BE
AS
AF
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
PHOK-A144WRFZ
LBNDKA168WRPZ
NFANJA053WRFZ
PDUC-A908WRWZ
*************
LANGFA267WRPZ
MLEVPA241WRFZ
PCOVPA419WREZ
PDUC-A909WRPZ
PPACGA176WREZ
PCUSUA501WRP0
PCUSGA662WREZ
PCUSGA661WREZ
PCUSGA615WRPZ
6-1
6-2
6-3
6-4
NTNT-A034WRF0
FROLPA101WRKZ
TCAUAA291WRRZ
TCAUAA268WRRZ
AM
AR
AE
AF
7-1
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
7-9
XHPSD40P08K00
XHTSD40P08RV0
LX-CZA070WRE0
LX-CZ0052WRE0
LX-EZA042WRE0
LX-CZA073WRE0
XHPSD40P08000
XOTSD40P08000
XOTSE40P08000
XOTSF40P08000
AC
AA
AC
AA
AB
AC
AA
AA
AA
AA
AL
AD
AG
AR
-AH
AG
AG
AN
AC
AB
AD
AD
AE
ELECTRIC PARTS
Secondary interlock switch/ Door sensing switch
Secondary interlock switch/ Door sensing switch (Interchangeable)
Secondary interlock switch/ Door sensing switch (Interchangeable)
Monitor fuse (15A) and monitor switch assembly (switch: AM51620C53Y1)
Power supply cord
Power supply cord (Interchangeable) (for production use)
High voltage rectifier assy
High voltage capacitor
High voltage capacitor (Interchangeable)
High voltage capacitor (Interchangeable)
High voltage capacitor (Interchangeable)
Fan motor
Fan motor (Interchangeable)
Fan motor (Interchangeable) for production use
Magnetron
Magnetron (Interchangeable) for production use
Oven lamp
Oven lamp (Interchangeable)
Oven lamp (Interchangeable)
Turntable motor
Turntable motor (Interchangeable)
Turntable motor (Interchangeable)
Temperature fuse 150C (Oven)
Thermal cut-out 145C (Oven) (Interchangeable)
Thermal cut-out 145C (Oven) (Interchangeable)
Power trnasformer
Power transformer (Interchangeable)
Noise filter
CABINET PARTS
Outer case cabinet [R-230KW]
Outer case cabinet [R-230KK]
Bottom plate
Foot
OVENPARTS
Latch hook
Capacitor holder
Fan blade
Fan duct
Oven cavity (Not replaceable part)
Chassis support
Switch lever
Waveguide cover
Air duct
TTM packing
Cushion
Cushion
Cushion
Cushion
MISCELLANEOUS
Turntable
Turntable support
Monitor caution
DHHS caution label
SCREWS, NUTS AND WASHERS
screw : 4mm x 8mm
Screw : 4mm x 8mm
Special screw (Torx tamper pfoof screw)
Special screw
Special screw
Special screw
Screw : 4mm x 8mm
Screw : 4mm x 8mm
Screw : 4mm x 8mm [R-230KW]
Screw : 4mm x 8mm [R-230KK]
3
R230KW
[2] DOOR AND CONTROL PANEL PARTS
5-7
5-6
5-1
5-2
5-3
5-5
5-4
3-8
3-1
3-7
3-5
3-1-2
3-4
6-5
3-6
3-1-1
6-6
3-3
3-2
4
R230KW
NO.
PARTS CODE
PRICE NEW PART
RANK MARK RANK
DESCRIPTION
[2] DOOR AND CONTROL PANEL PARTS
3-1
3-1
3-1-1
3-1-1
3-1-2
3-2
3-2
3-3
3-4
3-5
3-6
3-7
3-8
FPNLCB845WRKZ
FPNLCB846WRKZ
PSHEPB087WREZ
PSHEPB089WREZ
QSW-KA053DRZZ
JBTN-B308WRFZ
JBTN-B309WRFZ
MSPRCA050WRE0
DPWBFC479WRUZ
QCNC-A014WRZZ
RLCDSA105DRZZ
XEPSD30P08XS0
PCUSUA633WREZ
AZ
AZ
AT
AT
AQ
AG
AG
AB
BH
AE
AQ
AA
AE
5-1
5-2
5-2
5-3
5-3
5-4
5-5
5-6
5-7
FDORFA397WRTZ
GWAKPA978WRRZ
GWAKPA980WRRZ
HPNL-A833WRRZ
HPNL-A835WRRZ
LSTPPA205WRFZ
MSPRTA187WRE0
PSHEPA782WREZ
GCOVHA424WRFZ
BB
AW
AW
AS
AS
AF
AC
AG
AK
6-5
6-6
TINSEB076WRRZ
FW-VZC044WREZ
AM
AQ
Control panel frame with key unit [R-230KW]
Control panel frame with key unit [R-230KK]
Graphic sheet [R-230KW]
Graphic sheet [R-230KK]
Membrane switch
Open button [R-230KW]
Open button [R-230KK]
Open button spring
Control unit
Rubber connector
Liquid crystal display
Screw; 3mm x 8mm
Cushion
DOOR PARTS
Door panel assembly
Door frame [R-230KW]
Door frame [R-230KK]
Door screen [R-230KW]
Door screen [R-230KK]
Latch head
Spring
Sealer film
Choke cover
MISCELLANEOUS
Instruction book
Main wire harness
5
R230KW
„INDEX
PARTS CODE
[ D ]
DPWBFC479WRUZ
[ F ]
FACCDA107WREZ
FACCDA108WREZ
FDORFA397WRTZ
FFS-BA026WRKZ
FH-DZA114WRKZ
FPNLCB845WRKZ
FPNLCB846WRKZ
FPWBFA385WRKZ
FROLPA101WRKZ
FW-VZC044WREZ
[ G ]
GCABUA958WRPZ
GCABUA960WRPZ
GCOVHA424WRFZ
GDAI-A377WRWZ
GLEGPA104WREZ
GWAKPA978WRRZ
GWAKPA980WRRZ
[ H ]
HPNL-A833WRRZ
HPNL-A835WRRZ
[ J ]
JBTN-B308WRFZ
JBTN-B309WRFZ
[ L ]
LANGFA267WRPZ
LBNDKA168WRPZ
LSTPPA205WRFZ
LX-CZ0052WRE0
LX-CZA070WRE0
LX-CZA073WRE0
LX-EZA042WRE0
[ M ]
MLEVPA241WRFZ
MSPRCA050WRE0
MSPRTA187WRE0
[ N ]
NFANJA053WRFZ
NTNT-A034WRF0
[ P ]
PCOVPA419WREZ
PCUSGA615WREZ
PCUSGA661WREZ
PCUSGA662WREZ
PCUSUA501WRP0
PCUSUA633WREZ
PDUC-A908WRWZ
PDUC-A909WRPZ
PHOK-A144WRFZ
PPACGA176WREZ
PSHEPA782WREZ
PSHEPB087WREZ
PSHEPB089WREZ
No.
PRICE NEW PART
RANK MARK RANK
2-3-4
BH
1-1-3
1-1-3
2-5-1
1-1-2
1-1-4
2-3-1
2-3-1
1-1-12
1-6-2
2-6-6
AU
-BB
AN
AR
AZ
AZ
AV
AR
AQ
1-2-1
1-2-1
2-5-7
1-2-2
1-2-3
2-5-2
2-5-2
BE
BE
AK
AS
AF
AW
AW
2-5-3
2-5-3
AS
AS
2-3-2
2-3-2
AG
AG
1-4-6
1-4-2
2-5-4
1-7-4
1-7-3
1-7-6
1-7-5
AH
AD
AF
AA
AC
AC
AB
1-4-7
2-3-3
2-5-5
AG
AB
AC
1-4-3
1-6-1
AG
AM
1-4-8
1-4-14
1-4-13
1-4-12
1-4-11
2-3-8
1-4-4
1-4-9
1-4-1
1-4-10
2-5-6
2-3-1-1
2-3-1-1
AG
AE
AD
AD
AB
AE
AR
AN
AL
AC
AG
AT
AT
PARTS CODE
[ Q ]
QCNC-A014WRZZ
QFS-TA014WRE0
QSW-KA053DRZZ
QSW-MA085WRE0
QSW-MA137WRE0
QSW-MA147WRZZ
[ R ]
RC-PZA041WRE0
RC-QZA307WRZZ
RC-QZA327WRZZ
RC-QZA328WRZZ
RLCDSA105DRZZ
RLMPTA082WRZZ
RLMPTA085WRZZ
RLMPTA087WRZZ
RMOTDA186WRE0
RMOTDA252WRZZ
RMOTDA264WRZZ
RMOTEA346WRE0
RMOTEA356WRE0
RMOTEA433WRZZ
RTHM-A075WRE0
RTHM-A119WRE0
RTRN-A727WRZZ
RTRN-A728WRZZ
RV-MZA338WRZZ
RV-MZA339WRZZ
[ T ]
TCAUAA268WRRZ
TCAUAA291WRRZ
TINSEB076WRRZ
[ X ]
XEPSD30P08XS0
XHPSD40P08000
XHPSD40P08K00
XHTSD40P08RV0
XOTSD40P08000
XOTSE40P08000
XOTSF40P08000
No.
PRICE NEW PART
RANK MARK RANK
2-3-5
1-1-10
2-3-1-2
1-1-1
1-1-1
1-1-1
AE
AG
AQ
AF
AH
AG
1-1-5
1-1-5
1-1-5
1-1-5
2-3-6
1-1-8
1-1-8
1-1-8
1-1-9
1-1-9
1-1-9
1-1-6
1-1-6
1-1-6
1-1-10
1-1-10
1-1-11
1-1-11
1-1-7
1-1-7
AS
AX
AT
AS
AQ
AL
AL
AL
AW
AN
AT
AV
-AX
AN
AK
BF
BF
BH
--
1-6-4
1-6-3
2-6-5
AF
AE
AM
2-3-7
1-7-7
1-7-1
1-7-2
1-7-8
1-7-9
1-7-9
AA
AA
AC
AA
AA
AA
AA
COPYRIGHT © 2005 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
No part of this publication may be reproduced, stored in retrieval systems, or transmitted in anyform or
by any means, electronic, mechanical, photocopying, recording, or other wise, without prior written
permission of the publisher.
2005 SHARP CORP.(2S800E) Printed in U.S.A
6