Sharp VC-A10 User Manual

1
VC-A10/A10S/A500
VC-A50/A50S/A50SB
VC-A60/A75/A80S
VIDEO CASSETTE PLAYER
VC-A10/A10S/A50/A50S/
A50S(B)/A60/A75/A80S
VC-A500
SERVICE MANUAL
CONTENTS
Page
1. SPECIFICATIONS................................................................................................................. 2
2. DISASSEMBLY AND REASSEMBLY ................................................................................... 3
3. FUNCTION OF MAJOR MECHANICAL PARTS ................................................................... 6
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS .................. 9
5. ELECTRICAL ADJUSTMENT ............................................................................................. 28
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE............... 31
7. TROUBLESHOOTING ........................................................................................................ 37
8. BLOCK DIAGRAM............................................................................................................... 45
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 55
10. REPLACEMENT PARTS LIST ............................................................................................ 68
11. EXPLODED VIEW OF MECHANICAL PARTS ................................................................... 77
12. PACKING OF THE SET ...................................................................................................... 82
SHARP CORPORATION
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the
set should be restored to its original condition and only parts identical to those
specified be used.
VC-A10/A10S
VC-A50/A50S/A50S(B)
VC-A500
VC-A60
VC-A75
VC-A80S
S62L3VC-A10//

Sharp VC-A10 Specifications

General

Brand	Sharp
Model	VC-A10
Category	VCR
Language	English

Summary

Specifications

Disassembly and Reassembly

2-1 Disassembly of Major Blocks

Details the steps for disassembling major components of the unit.

Function of Major Mechanical Parts

Function of Major Mechanical Parts (Bottom View)

Illustrates and lists mechanical parts visible from the bottom view of the mechanism.

Adjustment, Replacement and Assembly of Mechanical Units

4-1 Mechanism Confirmation Adjustment Jig

Lists special jigs required for complete mechanism adjustment and maintenance.

4-2 Maintenance Check Items and Execution Time

Outlines regular maintenance checks and their recommended execution intervals.

4-3 Removing and Installing the Cassette Housing

Provides instructions for removing and reinstalling the cassette housing assembly.

4-5 Reel Disk Replacement and Height Check

Details the procedure for replacing and checking the height of the reel disks.

4-6 Checking and Adjustment of Take-Up Torque in Fast Forward Mode

Explains how to check and adjust take-up torque during fast forward operation.

4-11 Checking the Pinch Roller Pressure

Details the method for checking and adjusting the pinch roller's pressure.

4-15 Replacement of A/C (Audio/Control) Head

Provides steps for replacing the A/C head assembly, including necessary adjustments.

4-18 Replacement of the Capstan D.D. Motor (Direct Drive) Motor

Outlines the procedure for replacing the capstan direct drive motor.

4-20 Replacing the Upper and Lower Drum Assembly

Details the process for replacing the upper and lower drum assembly with care instructions.

4-22 Installing the Shifter

Explains the correct procedure for installing the shifter mechanism.

4-24 Replacement of Loading Motor

Provides instructions for replacing the loading motor, including pressing and adjustment.

4-25 Assembly of Cassette Housing

Details the assembly steps for the various components of the cassette housing.

Electrical Adjustment

Location of Controls and Test Points

Identifies key controls and test points necessary for performing electrical adjustments.

Servo Circuit Adjustment

Adjustment of Head Switching Point

Describes the procedure for adjusting the head switching point for accurate signal detection.

Y/C Circuit Adjustment

Checking of Video E-E Level

Explains how to check the video E-E level for signal integrity.

Mechanism Operation Flowchart and Troubleshooting Guide

Mechanism Operation Flowchart

Provides a flowchart illustrating the sequence of operations for the mechanism.

Troubleshooting

FF/REW Failure (No Tape Winding)

Guides users through troubleshooting steps for failures related to FF/REW operations.

REC/PLAY Failure (Mode Release)

Provides troubleshooting steps for failures occurring during record or playback modes.

Winding Failure at VSR

Details troubleshooting steps for winding failures encountered during the VSR mode.

Unusual Sound in Each Mode

Guides users on diagnosing and resolving unusual sounds occurring in different operating modes.

Block Diagram

Power Circuit Block Diagram

Illustrates the functional blocks and connections within the power circuit.

System Servo Block Diagram

Shows the block diagram for the system's servo control circuits.

Schematic Diagram and PWB Foil Pattern

Operation Circuit

Shows the schematic and PWB foil pattern for the operation circuit.

Main Circuit(1)

Presents the first part of the main circuit schematic diagram.

Secam Circuit (VC-A60)

Details the schematic for the SECAM circuit, specific to the VC-A60 model.

PWB Foil Pattern

Illustrates the foil patterns for the operation and SECAM Printed Wiring Boards.

Replacement Parts List

Parts Replacement

Lists all replaceable parts with their reference numbers, part numbers, descriptions, and codes.

Mechanism Chassis Parts

Lists replacement parts specifically for the mechanism chassis.

Cabinet Parts

Lists replacement parts related to the unit's cabinet and enclosure.

Exploded View of Mechanical Parts

Mechanism Chassis Parts

Provides an exploded view diagram of the mechanism chassis components.

Cassette Housing Control Parts

Shows an exploded view of the parts that constitute the cassette housing control mechanism.

Cabinet Parts

Illustrates the exploded view of external cabinet parts.

Front Panel Parts(VC-A10/A10S/A50/A50S/A50SB/A60/A75/A80S)

Lists and illustrates front panel parts for specific model series.

Packing of the Set