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Sharp R-520LK, R-520LW Figure S-5 . Printed Wiring Board of Power Unit

1 44

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R-520LK

R-520LW

4 5

123

4 5

123

Figure S-5 . Printed Wiring Board of Power Unit

RY1

RY2

E C B

VRS1

P S

C2

Q3 Q4 SP1

T1

DZ1 WH-2

WH-2

LED

D30

CN-B

CN-F

1 2 3

C10

DIP

CHIP

SIDE

R90

D31

E B1

1

2

Contents

Main TABLE OF CONTENTS R-520LK R-520LW MICROWAVE OVEN MODELS Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135 SERVICE MANUAL SHARP ELECTRONCS CORPORATION BEFORE SERVICING WARNING TO SERVICE PERSONNEL Before Servicing After repairing Don't Touch ! Danger High Voltage MICROWAVE MEASUREMENT PROCEDURE SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135 SERVICE MANUAL DANGER GENERAL INFORMATION GROUNDING INSTRUCTIONS SPECIFICATION ITEM DESCRIPTION OVEN DIAGRAM 3-Pronged Plug Grounded Receptacle Box Grounding Pin 3-Pronged Receptacle OPERATION DESCRIPTION OF OPERATING SEQUENCE OFF CONDITION COOKING CONDITION POWER LEVEL P-0 TO P-90 COOKING SENSOR COOKING CONDITION Cooking Sequence. Figure O-2 Oven Schematic - Cooking Condition Figure O-1 Oven Schematic - Off Condition GRY WHT GRY DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM DOOR SENSING AND PRIMARY INTERLOCK SWITCHES MONITOR SWITCH TURNTABLE MOTOR TROUBLESHOOTING GUIDE CK = Check / RE = Replace CK CK CK I CK Page Page Page Page Page Page a b c d Page Page TOUCH CONTROL PANEL ASSEMBLY DESCRIPTION OF LSI Page Page ABSOLUTE HUMIDITY SENSOR CIRCUIT TOUCH CONTROL PANEL SERVICING WARNING AGAINST HIGH VOLTAGE: OUTER CASE REMOVAL COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING FOR WIRING POWER TRANSFORMER REMOVAL HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL MAGNETRON REMOVAL Special screw Screw Driver (Type: TORX T20 H or GTXH20-100) POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL OVEN LAMP AND LAMP SOCKET REMOVAL CONTROL PANEL ASSEMBLY REMOVAL GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT TURNTABLE MOTOR REMOVAL COOLING FAN MOTOR REMOVAL DOOR SENSING SWITCH/PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL Side View Rear View DOOR SENSING SWITCH/PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT DOOR REPLACEMENT SEALER FILM 6 4 5 123 Figure S-1. Pictorial Diagram CN-F 3 2 BLK AHSENSOR Figure S-3. Control Unit Circuit Figure S-5 . Printed Wiring Board of Power Unit CN-B T1 C2 CN-F 1 2 3 PARTS LIST * ELECTRIC PARTS CABINET PARTS CONTROL PANEL PARTS HOW TO ORDER REPLACEMENT PARTS MISCELLANEOUS SCREWS,NUTS AND WASHERS OVEN AND CABINET PARTS 7-8 CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 3-8 3-9 3-3 3-11 PACKING AND ACCESSORIES NCAVITY s tem i