Hitachi DV-PF2U, Service Manual

Page: 2 / 97

CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1
COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . . . 1-2-1
LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . 1-3-1
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . 1-4-1
Product Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
Precautions during Servicing. . . . . . . . . . . . . . . . . . . . 1-4-1
Safety Check after Servicing . . . . . . . . . . . . . . . . . . . . 1-4-2
STANDARD NOTES FOR SERVICING . . . . . . . . . . . . 1-5-1
Circuit Board Indications . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Instructions for Connectors . . . . . . . . . . . . . . . . . . . . . 1-5-1
How to Remove/Install Flat Pack-IC . . . . . . . . . . . . . . 1-5-1
Instructions for Handling Semi-conductors . . . . . . . . . 1-5-3
PREPARATION FOR SERVICING . . . . . . . . . . . . . . . . 1-6-1
How to Enter the Service Mode. . . . . . . . . . . . . . . . . . 1-6-1
ORERATING CONTROLS AND FUNCTIONS . . . . . . . 1-7-1
FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . 1-8-1
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . 2-1-1
1. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . 2-1-1
2. Disassembly Method . . . . . . . . . . . . . . . . . . . . . . . . 2-1-1
DISASSEMBLY/ASSEMBLY PROCEDURES OF
DECK MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-1
ALIGNMENT PROCEDURES OF MECHANISM . . . . . 2-3-1
ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . . . 2-4-1
Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . 2-4-1
Head Switching Position Adjustment. . . . . . . . . . . . . . 2-4-1
FIXTURE AND TAPE FOR ADJUSTMENT . . . . . . . . . 2-5-1
How to Use The Fixtures . . . . . . . . . . . . . . . . . . . . . . . 2-5-1
MECHANICAL ALIGNMENT PROCEDURES . . . . . . . 2-6-1
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6-1
1. Tape Interchangeability Alignment. . . . . . . . . . . . . . 2-6-2
1-A.Preliminary/Final Checking and
Alignment of Tape Path . . . . . . . . . . . . . . . . . . . 2-6-3
1-B.X Value Alignment . . . . . . . . . . . . . . . . . . . . . . . . 2-6-3
1-C.Checking/Adjustment of Envelope Waveform . . . 2-6-4
1-D.Azimuth Alignment of
Audio/Control/Erase Head . . . . . . . . . . . . . . . . . 2-6-4
STANDARD MAINTENANCE . . . . . . . . . . . . . . . . . . . . 2-7-1
Service Schedule Components . . . . . . . . . . . . . . . . . . 2-7-1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7-2
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1
Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1
Deck Mechanism View 1 . . . . . . . . . . . . . . . . . . . . . . . 3-1-2
Deck Mechanism View 2 . . . . . . . . . . . . . . . . . . . . . . . 3-1-2
Deck Mechanism View 3 . . . . . . . . . . . . . . . . . . . . . . . 3-1-3
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . 3-2-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-3
SCHEMATIC DIAGRAMS/CBA’S AND
TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-1
<VCR Section>
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-3
Main 1/5 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-4
Main 2/5 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-5
Main 3/5 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-6
Main 4/5 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-7
Main 5/5 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-8
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-9
Function Schematic Diagram . . . . . . . . . . . . . . . . . . 4-1-10
Jack Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . 4-1-11
Main CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-12
Main CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . . 4-1-13
Function CBA Top/Bottom View . . . . . . . . . . . . . . . . 4-1-14
Jack CBA Top/Bottom View . . . . . . . . . . . . . . . . . . . 4-1-15
<DVD Section>
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-16
DVD Main 1/4 Schematic Diagram . . . . . . . . . . . . . . 4-1-17
DVD Main 2/4 Schematic Diagram . . . . . . . . . . . . . . 4-1-18
DVD Main 3/4 Schematic Diagram . . . . . . . . . . . . . . 4-1-19
DVD Main 4/4 Schematic Diagram . . . . . . . . . . . . . . 4-1-20
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-1
[ VTR Section ]
Servo/System Control Block Diagram . . . . . . . . . . . . . 4-2-1
Video Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-2
Audio Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-3
Hi-Fi Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . 4-2-4
Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . 4-2-5
[ DVD Section ]
DVD System Control Block Diagram. . . . . . . . . . . . . . 4-2-6
RF Signal Control/Servo Block Diagram . . . . . . . . . . . 4-2-7
DVD Signal Process Block Diagram . . . . . . . . . . . . . . 4-2-8
DVD Video Block Diagram . . . . . . . . . . . . . . . . . . . . . 4-2-9
DVD Audio Block Diagram . . . . . . . . . . . . . . . . . . . . 4-2-10
SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 4-3-1
IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . 4-4-1
LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 4-5-1
CHAPTER 1 GENERAL INFORMATION
CHAPTER 2 DISASSEMBLY AND ADJUSTMENT
CHAPTER 3 EXPLODED VIEWS AND PARTS LIST
CHAPTER 4
SCHEMATIC AND BLOCK DIAGRAMS/
CBA’S