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SUPPLEMENTAL
SHARF?
SERVICE MANUAL
R-430BK
R-430BW
R-430BD
S38Mi 07R430BE
MICROWAVE OVEN MODELS
R-430BK/R-430BW
/ R-430BD
In the interest of user-safety the oven is to be restored
to its original condition and only the parts identical to
those specified should be used.
R-430BW
WARNING TO SERVICE PERSONNEL: Microwave
ovens contain
circuitry
capable of producing
very high voltage and current. Contact with the
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..)
This is a supplemental Service Manual for Microwave Oven models R-430BK, R-430BW & R-430BD
These models are quite similar to the Base Model R-420BK (S/M#S28M104R420BE
).
This supplemental manual must be used in conjunction with the base model service manual for complete operation, service,
safety and replacement parts information.
TABLE OF CONTENTS
SECTION
PAGE
PRECAUTIONS
TO BE OBSERVED BEFORE AND DURING SERVICE TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY. ...........
Inside Front Cover
Before Servicing
.............................................................
Inside Front Cover
Warning to Service Personnel .................................................................
1
Forewordandwarning
.......................................................................
2
Specifications
...............................................................................
3
KeyUnitLayout
.............................................................................
4
Operation
..................................................................................
5
Servicing and Troubleshooting
Guide
..........................................................
6
TestProcedures
.............................................................................
7
TouchControlOutline
.......................................................................
13
Component Replacement and Adjustment Procedure
...........................................
18
Microwave Measurement
Procedure
..........................................................
22
Schematic / Wiring Diagram
.................................................................
23
Parts
.....................................................................................
28
Packing and Accessories
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
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Related Manuals for Sharp R-430BK
Summary of Contents for Sharp R-430BK
- Page 1 R-430BW Harness etc..) This is a supplemental Service Manual for Microwave Oven models R-430BK, R-430BW & R-430BD These models are quite similar to the Base Model R-420BK (S/M#S28M104R420BE This supplemental manual must be used in conjunction with the base model service manual for complete operation, service, safety and replacement parts information.
- Page 2 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 DHHS immediately. Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2e The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.
- Page 3 Sharp Electronics Corporation personnel with complete operation and service information for Sharp microwave General Information oven models R-430BWR=430BW/R=430BD. It is recommended that service personnel carefully study the entire text of this manual so they will be qualified to render satisfactory customer service.
- Page 4 R-430BK R-430BW R-430BD WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current. Con- tact 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..
- Page 5 R-430BK R-430BW R-430BD SPECIFICATIONS Item Description Power Requirements 120 Volts 14 Amperes 1650 Watts 60 Hertz Single phase, 3 wire grounded 1100 Power Output watts (IEC-705 Test Procedure) Operating frequency of 2450 MHz Width 21 ll&” Case Dimensions Height 1231;’ (including feet) Depth 1731~”...
- Page 6 R-430BK R-430BW R-430BD Key Unit Layout a. Indicators. b. Lighted digital display. Custom Help. Features user friendly communications during cooking procedure. d. SENSOR COOKING pads. Cooking time is determined by AH Sensor e. Minute Plus pad. Touch to start oven or Touch to cook for 1 minute at 100% power or to increase cook- ing time.
- Page 7 OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of compon ent functions during oven ope ration. Sensor Cooking Condition When using the REHEAT function, the foods are cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and the power level needed for 1 best results.
- Page 8 R-430BK R-430BW R-430BD 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”...
- Page 9 R-430BK R-430BW R-430BD Procedure Letter Component Test Touch Control Panel Assembly Test The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. There- fore, unlike conventional microwave ovens, proper maintenance can not be performed with only a voltmeter and ohmmeter.
- Page 10 R-430BK R-430BW R-430BD TEST PROCEDURES Component Test Procedure Letter Touch Control Panel Assembly Test (Confinued) When testing is completed, 1. Disconnect the supply cord, and then remove outer case cabinet. power 2. Open the door and block it open. 3. Discharge the high voltage capacitor.
- Page 11 R-430BK TEST PROCEDURES .’ Procedure Letter Component Test Continued Procedures to be taken when the foil pattern of the printed wiring board (PWB) is open Make a visual inspection of the varistor burn damage and test the transformer with an ohm-...
- Page 12 R-430BK R-430BW R-430BD TEST PROCEDURES Procedure Letter Component Test Compu 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 “COMPU DEFROST” pad once and touch the number pad “I”, and touch the number pad “5”.
- Page 13 R-430BK Procedure Letter Component Test AH Sensor Test Checking the initial sensor cooking condition 1. The oven should be plugged in at least five minutes before sensor cooking. 2. Room temperature should not exceed 95” F (35” C). 3. The unit should not be installed in any areas where heat and steam are generated. The unit should not be installed, for example, next to a conventional surface unit.
- Page 14 R-430BK R-430BW R-430BD Procedure Letter Component Test Checking the Control Unit (Confinued) 6. Disconnect the wire leads to the primary of power transformer. 7. Ensure that these leads remain isolated from other components and oven chassis by using insu- lated tape.
- Page 15 R-430BK E%dl OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units emit Audible sounds (key touch sound and comple- as shown in the touch control panel circuit: tion sound). (1) Key Unit Door Sensing Switch (2) Control Unit (The Control Unit consist of Power Unit A switch to “tell”...
- Page 16 R-430BK R-430BW R-430BD The I/O signals of the LSI (IZA866DR) is detailed in the following table. ( Pin No. 1 Signal 1 1 Description Signal coming from touch-key. When either G-12 line on key matrix is touched, a corresponding signal out of P20-P27 will be input into AN8.
- Page 17 R-430BK R-430BW R-430BD Pin No. Signal Description Signal to sound Buzzer (2.0 kHz). 0.1 sec. B: completion sound Terminal not used. Common data signal: COM5. Connected to LCD signal COM5 (Pin No. 37). P33-P37 Segment data signal. 25-29 Connected to LCD.
- Page 18 R-430BK R-430BW R-430BD Pin No. Signal Description 80-84 PIO-PI4 Used for Initial balancing of the bridge circuit (absolute humidity sensor). 85-86 P15-PI6 Terminal not used. Oven lamp, fan motor and turntable motor driving signal. To turn on and off shut off relay RYI. The square waveform voltage is delivered to the RY-1 driving circuit and RY-2 control circuit.
- Page 19 the two can’t be separated. For those models, check Precautions for Handling Electronic and repair all the controls (sensor-related ones in- Components cluded) of the touch control panel while keeping it This unit uses CMOS LSI in the integral part of the cir- connected to the oven.
- Page 20 The door is bent or warped. 4. If the outer case cabinet is not fitted. er and oven cavity. 3 prevent electric shock, take the following pre- 3utions. 3) Sharp edge: Bottom plate, oven cavity, waveguide, flange, Before wiring. chassis support and other metallic plate.
- Page 21 R-430BK ABSOLUTE HUMIDITY SENSOR CIRCUIT Structure of Absolute Humidity Sensor the sensor cooking of the unit. When the unit is set in the sensor cooking mode, 16 sec- The absolute humidity sensor includes two thermistors onds later the detector circuit starts to function and the as shown in the illustration.
- Page 22 R-430BK R-430BW R-430BD AH SENSOR DUCT REMOVAL 7. Slide the two tabs of the sensor duct to the right. Disconnect the power supply cord. Open the oven door and block it open. 8. Sensor duct is now free. Remove screws from the rear of the outercase cabi- net.
- Page 23 R-430BK R-430BW R-430BD SENSOR ORIENTATION 8t HARNESS ROUTING AH Sensor Orientation Mounting Screw AH Sensor Duct AH densor Figure l-1 6 Oven Left Side View AH Sensor Harness Figure 2-16 Oven Top View...
- Page 24 R-430BK R-430BW R-430BD MICROWAVE MEASUREMENT PROCEDURE After adjustment of the door, interlock and monitor 2. Place the oven tray in the oven cavity. switches are completed individually or collectively, a IN- 3. Place the load of 275 & 15ml(9.8 oz.) of tap water ini-...
- Page 26 R-430BK R-430BW R-430BD - - - - - ’ 00’...
- Page 29 R-430BK R-430BW R-430BD Printed Wiring Board of Power Unit...
- Page 30 R-430BK R-430BW R-430BD Contact your nearest SHARP Parts Distributor to order. For location of SHARP Parts Distributor, Please call Toll-Free; I-800-BE-SHARP Code Ref No. Part No. Description Electrical H.V. Capacitor l- 1 RC-QZB018MREO H.V. Diode assembly l- 2 FH-DZBOO8MRYO Oven lamp socket...
- Page 31 R-430BK R-430BW R-430BD Ref No. Part No. Description Code Control Panel / CPWBFBOllMRUO- Control unit' 3-1A QCNCMA446DREO &pin connector (CN-A) 3-1B QCNCMA275DREO 2-pin connector (CN-B) 3-1c FW-VZB146MREO Lead wire harness (WH-1) RC-KZAO87DREO Capacitor O.lkF 50V VCEAB31EW108M Capacitor 1000pF 35V RC-KZA087DREO Capacitor O.lpF 50V...
- Page 32 R-430BK R-430BW R-430BD Ref No. Part No. Description Code Door CDORFB217MRKO Door assembly(R-43OBK) 4- 0 CDORFB216MRKO Door assembly (R-430BW) 4- 0 CDORFB215MRKO Door assembly(R-43OBD) 4- 1 FCOV-Bll5MRKO Door screen assembly (R-430BK) 4- 1 FCOV-B116MRKO Door screen assembly (R-43OBW) 4- 1...
- Page 34 R-430BK R-430BW R-430BD Control Panel Assembly Door Assembly ---------~-___- ------- _L ------------~-- r---- ‘$ ‘\ ’ l--_____-__----------~-_----_--_--___----------_-...