CONTENTS
1 CAUTIONS FOR SAFETY IN PERFORMING
REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-1 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . 1-1
1-1-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . 1-1
1-1-2 Precautions during Servicing . . . . . . . . . . . . . . 1-1
1-1-3 Safety Check after Servicing. . . . . . . . . . . . . . . 1-2
1-2 STANDARD NOTES FOR SERVICING . . . . . . . . . 1-3
1-2-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . 1-3
1-2-2 Instructions for Connectors . . . . . . . . . . . . . . . . 1-3
1-2-3 Pb (Lead) Free Solder. . . . . . . . . . . . . . . . . . . . 1-3
1-2-4 Instructions for Handling Semi-conductors . . . . 1-3
2 GENERAL INFORMATION . . . . . . . . . . . . . . . 2-1
2-1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 COMPARISON OF MODELS. . . . . . . . . . . . . . . . . 2-3
2-2-1 Comparison of Features . . . . . . . . . . . . . . . . . . 2-3
2-2-2 Comparison of Main Control ICs. . . . . . . . . . . . 2-4
2-3 FUNCTION INDICATOR SYMBOLS . . . . . . . . . . . 2-5
2-4 OPERATING CONTROLS AND FUNCTIONS. . . . 2-7
3 MAINTENANCE AND INSPECTION. . . . . . . . 3-1
3-1 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . 3-1
3-2 STANDARD MAINTENANCE. . . . . . . . . . . . . . . . . 3-6
3-2-1 Service Schedule of Components. . . . . . . . . . . 3-6
3-2-2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
4 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-1 CABINET DISASSEMBLY INSTRUCTIONS . . . . . 4-1
4-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . 4-1
4-1-2 Disassembly Method. . . . . . . . . . . . . . . . . . . . . 4-1
4-2 DISASSEMBLY/ASSEMBLY PROCEDURES
OF DECK MECHANISM . . . . . . . . . . . . . . . . . . . . 4-4
4-3 ALIGNMENT PROCEDURES OF MECHANISM. 4-13
5 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-1 PREPARATION FOR SERVICING. . . . . . . . . . . . . 5-1
5-1-1 How to Enter the Service Mode. . . . . . . . . . . . . 5-1
5-2 FIXTURE AND TAPE FOR ADJUSTMENT . . . . . . 5-2
5-2-1 How To Use The Fixtures And Tape . . . . . . . . . 5-2
5-3 ELECTRICAL ADJUSTMENT INSTRUCTIONS . . 5-3
5-3-1 Test Equipment Required . . . . . . . . . . . . . . . . . 5-3
5-3-2 Head Switching Position Adjustment. . . . . . . . . 5-3
5-4 MECHANICAL ALIGNMENT PROCEDURES. . . . 5-4
5-4-1 Service Information . . . . . . . . . . . . . . . . . . . . . . 5-4
5-4-2 Tape Interchangeability Alignment . . . . . . . . . . 5-5
1-A. Preliminary/Final Checking and
Alignment of Tape Path . . . . . . . . . . . . . . . . . . . 5-6
1-B. X Value Alignment. . . . . . . . . . . . . . . . . . . . . . . 5-6
1-C. Checking/Adjustment of Envelope Waveform . . 5-7
1-D. Azimuth Alignment of
Audio/Control/Erase Head. . . . . . . . . . . . . . . . . 5-8
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 . . . . . . . . . . . 6-3
6-1-4 Deck Mechanism View 3 Section . . . . . . . . . . . 6-4
6-2 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . 6-5
6-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . 6-5
6-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . 6-5
7 APPENDIX. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7-1 SYSTEM CONTROL TIMING CHARTS . . . . . . . . 7-1
7-2 IC PIN FUNCTION DESCRIPTIONS. . . . . . . . . . . 7-8
7-3 LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . 7-11
S SCHEMATIC, WIRING DIAGRAMS
S-1 Schematic Diagrams/PCB’s and Test Points . . . . . S-1
S-2 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
S-3 Main 1/7 Schematic Diagram. . . . . . . . . . . . . . . . . S-4
S-4 Main 2/7, Sensor Schematic Diagram . . . . . . . . . . S-5
S-5 Main 3/7 Schematic Diagram. . . . . . . . . . . . . . . . . S-6
S-6 Main 4/7, Jack, Sub Jack Schematic Diagram. . . . S-7
S-7 Main 5/7 Schematic Diagram. . . . . . . . . . . . . . . . . S-8
S-8 Main 6/7 Schematic Diagram ( VT-FX440E(UK) ) . S-9
S-9 Main 7/7 Schematic Diagram. . . . . . . . . . . . . . . . S-10
S-10AFV Schematic Diagram ( VT-FX440E(UK) ). . . . S-11
S-11Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-12
C CIRCUIT BOARD DIAGRAMS
C-1 Main PCB, Sensor PCB Top View . . . . . . . . . . . . . C-1
C-2 Main PCB Bottom View . . . . . . . . . . . . . . . . . . . . . C-2
C-3 Jack PCB Top / Bottom View . . . . . . . . . . . . . . . . . C-3
C-4 AFV PCB Top View / Bottom View,
Sub Jack PCB Top View / Bottom View
( VT-FX440E(UK) ). . . . . . . . . . . . . . . . . . . . . . . . . C-4
B BLOCK DIAGRAMS
B-1 Servo/System Control Block Diagram . . . . . . . . . . B-1
B-2 Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . B-2
B-3 Audio Block Diagram ( VT-MX410E(UK) ) . . . . . . . B-3
B-4 Audio Block Diagram ( VT-FX440E(UK) ). . . . . . . . B-4
B-5 Hi-Fi Audio Block Diagram ( VT-FX440E(UK) ) . . . B-5
B-6 Power Supply Block Diagram. . . . . . . . . . . . . . . . . B-6
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