Sanyo VHR-H792E - Default Chapter; Table of Contents

TABLE OF CONTENTS
SECTION 1
SUMMARY
KEY TO ABBREVIATIONS . . . . . . . . . . . . . . . . 1-1
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . 1-2
• Precautions During Servicing
SAFETY CHECK AFTER SERVICING . . . . . . . . 1-3
• Insulation resistance test
• Dielectric strength test
• Clearance distance
• Leakage current test
PROPOSAL FOR APPLYING SHORT
PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
SERVICE NOTICE ON REPLACING EEPROM . .1-5
SERVICE INFORMATION FOR EEPROM
IC SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 1-7
SECTION 2
CABINET & MAIN CHASSIS
SERVICE METHOD . . . . . . . . . . . . . . . . . . . . . 2-1
Electrical Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . 2-2
1. Cabinet & Main Frame Section . . . . . . . . . . . . . 2-2
2. Packing & Accessory Section . . . . . . . . . . . . . . 2-3
SECTION 3
ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS
ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . .3-1
ELECTRICAL ADJUSTMENT PROCEDURES . . 3-2
1. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
ELECTRICAL TROUBLESHOOTING GUIDE . . . 3-4
1. Power Circuit(SMPS) . . . . . . . . . . . . . . . . . . . . . 3-4
2. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
3. System & Front Panel Circuit . . . . . . . . . . . . . . .3-10
4. Y/C Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
5. Tuner/IF Circuit . . . . . . . . . . . . . . . . . . . . . . . . .3-16
6. Hi-Fi Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . .3-21
1. Power Block Diagram . . . . . . . . . . . . . . . . . . . .3-21
2. Tuner/IF, NICAM & A2 Block Diagram . . . . . . . .3-23
3. VPS Block Diagram . . . . . . . . . . . . . . . . . . . . . .3-24
4. Y/C Block Diagram . . . . . . . . . . . . . . . . . . . . . .3-25
5. Hi-Fi Block Diagram . . . . . . . . . . . . . . . . . . . . .3-26
6. System Block Diagram . . . . . . . . . . . . . . . . . . .3-27
CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . .3-29
1. Power Circuit Diagram . . . . . . . . . . . . . . . . . . . .3-29
2. Tuner, NICAM/A2 Circuit Diagram . . . . . . . . . . .3-31
3. A/V, SECAM, VPS Circuit Diagram . . . . . . . . . .3-33
4. System Circuit Diagram . . . . . . . . . . . . . . . . . . .3-36
5. Key Circuit Diagram . . . . . . . . . . . . . . . . . . . . .3-39
6. Hi-Fi, SCART Circuit Diagram . . . . . . . . . . . . . .3-41
• CIRCUIT VOLTAGE CHART . . . . . . . . . . . . . . . .3-43
PRINTED CIRCUIT BOARD DIAGRAMS . . . . .3-47
1. MAIN P.C.Board . . . . . . . . . . . . . . . . . . . . . . . .3-47
2. KEY (LEFT) P.C.Board . . . . . . . . . . . . . . . . . . .3-49
3. KEY (RIGHT) P.C.Board . . . . . . . . . . . . . . . . . .3-50
SECTION 4
MECHANISM . . . . . . . . . . . . . . . . . . . . . .4-1
SECTION 5
REPLACEMENT PARTS LIST
. . . . . . . . . . . . . . . . . . . . . . .5-1
NOTE) The table of contents for this section is edited
NOTE) separately.