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Kitchen Appliance
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Microwave Oven
Sharp
R-520LK, R-520LW
Figure S-3. Control Unit Circuit
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44 pages, 1.71 Mb
37
R-520LK
R-520LW
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Figure S-3. Control Unit Circuit
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
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tem
i