Table Of Contents - Hitachi DV-PF73U Service Manual

1 CAUTIONS FOR SAFETY IN PERFORMING
REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1-1 LASER BEAM SAFETY PRECAUTIONS . . . . . . . . 1-1
1-2 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . 1-2
1-2-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . . 1-2
1-2-2 Precautions during Servicing. . . . . . . . . . . . . . . . 1-2
1-2-3 Safety Check after Servicing . . . . . . . . . . . . . . . . 1-3
1-3 STANDARD NOTES FOR SERVICING. . . . . . . . . . 1-4
1-3-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . . 1-4
1-3-2 Instructions for Connectors . . . . . . . . . . . . . . . . . 1-4
1-3-3 How to Remove/Install Flat Pack-IC . . . . . . . . . . 1-4
1-3-4 Instructions for Handling Semi-conductors . . . . . 1-6
2 GENERAL INFORMATION . . . . . . . . . . . . . . . . .2-1
2-1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 COMPARISON OF MODELS . . . . . . . . . . . . . . . . . 2-2
2-2-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2-2 VCR Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2-3 DVD Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-3 OPERATING CONTROLS AND FUNCTIONS . . . . 2-4
3 MAINTENANCE AND INSPECTION. . . . . . . . . .3-1
3-1 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . 3-1
3-1-1 Power Supply Section . . . . . . . . . . . . . . . . . . . . . 3-1
3-1-2 DVD Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-1-3 VCR Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3-2 FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . 3-15
3-2-1 How to Update the Firmware Version . . . . . . . . 3-15
3-2-2 How to Verify the Firmware Version . . . . . . . . . 3-16
3-3 STANDARD MAINTENANCE . . . . . . . . . . . . . . . . 3-17
3-3-1 Service Schedule of Components . . . . . . . . . . . 3-17
3-3-2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4-1 PREPARATION FOR SERVICING . . . . . . . . . . . . . 4-1
4-1-1 How to Enter the Service Mode. . . . . . . . . . . . . . 4-1
4-2 FIXTURE AND TAPE FOR ADJUSTMENT . . . . . . . 4-2
4-2-1 How to Use The Fixtures. . . . . . . . . . . . . . . . . . . 4-2
4-3 ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . 4-3
4-3-1 Test Equipment Required . . . . . . . . . . . . . . . . . . 4-3
4-3-2 Head Switching Position Adjustment. . . . . . . . . . 4-3
4-4 MECHANICAL ALIGNMENT PROCEDURES . . . . . 4-4
4-4-1 Service Information . . . . . . . . . . . . . . . . . . . . . . . 4-4
4-4-2 Tape Interchangeability Alignment . . . . . . . . . . . 4-5
1-A. Preliminary/Final Checking and
Alignment of Tape Path . . . . . . . . . . . . . . . . . . . . 4-6
1-B. X Value Alignment . . . . . . . . . . . . . . . . . . . . . . . . 4-6
1-C. Checking/Adjustment of Envelope Waveform . . . 4-7
1-D. Azimuth Alignment of
Audio/Control/Erase Head. . . . . . . . . . . . . . . . . . 4-7
5 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5-1 CABINET DISASSEMBLY INSTRUCTIONS . . . . . . 5-1
5-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . 5-1
5-1-2 Disassembly Method . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2 DISASSEMBLY/ASSEMBLY PROCEDURES
OF DECK MECHANISM . . . . . . . . . . . . . . . . . . . . . 5-6
5-3 ALIGNMENT PROCEDURES OF MECHANISM. . 5-14
CONTENTS
6 EXPLODEDS VIEWS AND PARTS LIST . . . . . 6-1
6-1 EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6-1-1 Cabinet Section. . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6-1-2 Deck Mechanism View 1 Section . . . . . . . . . . . . .6-2
6-1-3 Deck Mechanism View 2 Section . . . . . . . . . . . . .6-2
6-1-4 Deck Mechanism View 3 Section . . . . . . . . . . . . .6-3
6-2 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . .6-4
6-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . .6-4
6-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . .6-6
SCHEMATIC AND BLOCK DIAGRAMS/CBA'S
1 SCHEMATIC DIAGRAMS/CBA'S AND TEST POINTS . 1
2 WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2-1 VCR Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2-2 DVD Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 5
3-1 Main 1/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 5
3-2 Main 2/8 & Sensor Schematic Diagrams . . . . . . . . . . . 6
3-3 Main 3/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 7
3-4 Main 4/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 8
3-5 Main 5/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 9
3-6 Main 6/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . 10
3-7 Main 7/8 & OPEN/CLOSE Schematic Diagrams . . . . 11
3-8 Main 8/8 Schematic Diagram. . . . . . . . . . . . . . . . . . . 12
3-9 Power Supply & Junction Schematic Diagrams. . . . . 13
3-10 Function Schematic Diagram. . . . . . . . . . . . . . . . . . . 14
3-11 DVD Main 1/3 Schematic Diagram . . . . . . . . . . . . . . 15
3-12 DVD Main 2/3 Schematic Diagram . . . . . . . . . . . . . . 16
3-13 DVD Main 3/3 Schematic Diagram . . . . . . . . . . . . . . 18
4 WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 CIRCUIT BOARD DIAGRAMS . . . . . . . . . . . . . . . . . . . 20
5-1 Main CBA Top View & Sensor CBA Top View . . . . . . 20
5-2 Main CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . . 21
5-3 Function CBA Top/Bottom View &
DVD OPEN/CLOSE CBA Top/Bottom View . . . . . . . 22
5-4 Power Supply CBA Top/Bottom View . . . . . . . . . . . . 23
6 BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6-1 Servo/System Control Block Diagram . . . . . . . . . . . . 24
6-2 Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 25
6-3 Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 26
6-4 Hi-Fi Audio Block Diagram. . . . . . . . . . . . . . . . . . . . . 27
6-5 Power Supply Block Diagram . . . . . . . . . . . . . . . . . . 28
6-6 DVD System Control/Servo Block Diagram. . . . . . . . 29
6-7 Digital Signal Process Block Diagram . . . . . . . . . . . . 30
6-8 DVD Video / Audio Block Diagram . . . . . . . . . . . . . . 31
7 SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 32
8 IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . 37
9 LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 40