Table Of Contents - Sharp R-820BK Service Manual

Table of Contents

Table Of Contents1
Before Servicing2
Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy2
Warning To Service Personnel3
After Repairing3
Microwave Measurement Procedure4
Requirements4
Preparation For Testing4
Leakage Test4
Specification6
General Information6
Grounding Instructions6
Oven Diagram7
Touch Control Panel7
Description Of Operating Sequence8
Off Condition8
Microwave Cooking Condition8
Operating Sequence8
Top And Bottom Heater Mode9
Top Heater Mode9
Convection Time Cooking Condition9
Convection Cooking Condition With Preheat9
Roast Cooking Condition10
Fire Sensing Feature (Microwave Mode)10
On/Off Time Ratio10
Oven Schematic-Off Condition11
Oven Schematic-Microwave Cooking Condition11
Oven Schematic-Grill Cooking Condition12
Description And Function Of Components14
Door Open Mechanism14
Turntable Motor14
Cooling Fan Motor14
Bottom Heater15
Convection Cooking System15
Troubleshooting Guide15
Test Procedure16
Test Procedures17
Magnetron Assembly Test17
Microwave Output Power17
Power Transformer Test17
High Voltage Rectifier Test18
High Voltage Capacitor Test18
Thermal Cut-Out Test 170˚C (Oven)18
Secondary Interlock Switch Test19
Primary Interlock System Test19
Door Sensing Switch19
Primary Interlock Relay (Ry2)19
Blown Monitor Fuse Test20
Top Heaters And Bottom Heater Test20
Resistance Of Heater20
Insulation Resistance20
Thermistor Test21
Checking Temperature In The Convection Mode21
Touch Control Panel Assembly Test21
Key Unit Test22
Relay Test23
Compu Defrost Test24
Foil Pattern On The Printed Wiring Board Test24
Outline Of Touch Control Panel26
Description Of Lsi27
Servicing31
Precautions For Handling Electronic Components31
Shapes Of Electronic Components31
Servicing Of Touch Control Panel31
Component Replacement And Adjustment Procedure32
Warning Against High Voltage32
Warning For Wiring32
Outer Case Removal32
Power Transformer Removal33
High Voltage Rectifier Assembly And High Voltage Capacitor Removal33
Magnetron Removal33
Control Panel Assembly Removal33
Oven Lamp And Lamp Socket Removal34
Connector (No-Case Type) Removal34
Turntable Motor Removal34
Cooling Fan Motor Removal35
Convection Motor Removal35
Thermistor Removal36
Power Supply Cord Replacement36
Gril Heater (Top Heater) Removal36
Bottom Heater Removal36
Pictorial Diagram36
Door Replacement37
Latch Switch Adjustments37
Door Disassembly37
Parts List43
Electric Parts43
Cabinet Parts43
Control Panel Parts43
Power Unit Circuit43
Cpu Unit Circuit43
Oven Parts44
Door Parts44
Miscellaneous44
Screws,Nuts And Washers45
How To Order Replacement Parts45
Packing And Accessories45
Oven And Cabinet Parts46