Toshiba V-66G High Quality Service Manual

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• INSTRUCTIONS

1. GENERAL DESCRIPTION

1.1 GENERAL OUTLINE

1.2 MECHACON OPERATIONS

1.2.1 Power ON State

1.2.2 Cassette Housing up/down

1.2.3 Operating Modes

1.2.4 TIMER Button ON

1.2.5 Mode Shift Table

1.2.6 FDP Symbols vs Operating Modes

1.2.7 Display/Timer Section

2. MECHANICAL ADJUSTMENTS

2.1 GENERAL

2.1.1 Precautions

2.1.2 Required Jigs and Tools

2.1.3 Disassembly

2.2 PERIODIC MAINTENANCE

2.2.1 Layout of Maintenance Parts

2.2.2 Service Schedule for Main Components

2.3 MAIN ASSEMBLY REPLACEMENT

2.3.1 Cassette Housing

2.3.2 Upper Drum

2.3.3 Full Erase Head

2.3.4 Audio/Control Head

2.3.5 Pinch Roller

2.3.6 Capstan Motor

2.3.7 Mode Control Motor

2.3.8 Cassette Motor

2.3.9 Reel Disks

2.3.10 Clutch Mechanism

2.3.11 Brush

2.3.12 Tension Band

2.3.1 3 Pick – up Head

2.4 CHECKS AND ADJUSTMENTS

2.4.1 Mechanism Timing Check

2.4.2 Tension Pole Position Check

2.4.3 Take – up Torque Check

2.4.4 Back Tension Check

2.4.5 Tape Transport System Checks and Adjustments

2.4.6 Interchangeability Checks and Adjustments

3. ELECTRICAL ADJUSTMENTS

3.1 PREPARATION

3.2 REQUIRED TEST EQUIPMENT

3.2.1 Alignment Tape Contents

3.3 REGULATOR CIRCUIT (01 Power Supply Board)

3.4 AUDIO CIRCUIT (02 Main Board)

3.5 SERVO CIRCUIT (02 Main Board)

3.6 VIDEO CIRCUIT (02 Main Board)

3.7 TUNER /IF CIRCUIT (04 TU/IF Board)

4. CHARTS AND DIAGRAMS

4.1 CIRCUIT BOARD LOCATIONS

4.1.1 Connections

4.1.2 Indications

4.1.3 Digital Transistor

4.1.4 Chip Transistor

4.1.5 Chip Diode

4.1.6 Signal Flow in the Schematic

4.2 KEY TO ABBREVIATIONS

4.3 TUNER/IF/TIMER/DISPLAY BLOCK DIAGRAMS

4.4 MECHACON BLOCK DIAGRAM

4.5 MECHACON TIMING CHARTS

4.6 SERVO BLOCK DIAGRAM

4.7 SERVO TIMING CHARTS

4.8 VIDEO (Y) BLOCK DIAGRAM

4.9 VIDEO (COLOUR) BLOCK DIAGRAM

4.10 MAIN (AUDIO/VIDEO SECTION) SCHEMATIC DIAGRAM

4.11 MAIN (MECHACON/SERVO SECTION) AND HEAD/MDA SCHEMATIC DIAGRAMS

4.12 TERMINAL SCHEMATIC DIAGRAM

4.13 TERMINAL, HEAD MDA, POWER SW CIRCUIT BOARDS

4.14 MAIN CIRCUIT BOARD

4.15 TUNER/IF AND POWER SUPPLY SCHEMATIC DIAGRAMS

4.16 TIMER, DISPLAY AND PRESETTER SCHEMATIC DIAGRAMS

4.17 OPERATION AND TIMER CIRCUIT BOARDS

4.18 TUNER/IF AND POWER SUPPLY CIRCUIT BOARDS

4.19 RF CONVERTER AND MIX BOOSTER SCHEMATIC DIAGRAM

4.20 OVERALL WIRING

4.21 REMOTE CONTROL SCHEMATIC DIAGRAM

5. EXPLODED VIEWS AND PARTS LIST

5.1 PACKING ASSEMBLY

5.2 CABINET ASSEMBLY

5.3 CHASSIS ASSEMBLY

5.4 MECHANISM ASSEMBLY

5.5 CASSETTE HOUSING ASSEMBLY

6. ELECTRICAL PARTS LIST

6.1 POWER SUPPLY BOARD ASSEMBLY

6.2 MAIN BOARD ASSEMBLY

6.3 TERMINAL BOARD ASSEMBLY

6.4 TUNER/IF BOARD ASSEMBLY

6.5 HEAD/MDA BOARD ASSEMBLY

6.6 RF CONVERTER & MIX BOOSTER ASSEMBLY

6.7 AUDIO/CTL HEAD BOARD ASSEMBLY

6.8 END SENSOR BOARD ASSEMBLY

6.9 MODE (LOADING) SENSOR BOARD ASSEMBLY

6.10 CASSETTE LED BOARD ASSEMBLY

6.11 IFR BOARD ASSEMBLY

6.12 CASSETTE HOUSING BOARD ASSEMBLY

6.13 DECK TERMINAL BOARD ASSEMBLY

6.14 TU REEL SENSOR BOARD ASSEMBLY

6.15 MODE CTL MOTOR BOARD ASSEMBLY

6.16 POWER SWITCH BOARD ASSEMBLY

6.17 DISPLAY BOARD ASSEMBLY

6.18 OPERATION BOARD ASSEMBLY

6.19 TIMER BOARD ASSEMBLY

6.20 PRESETTER BOARD ASSEMBLY

6.21 DISPLAY SUB BOARD ASSEMBLY

6.22 REMOTE CONTROL BOARD ASSEMBLY