Panasonic Omnivision VHS PV-7664, Service Manual

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 WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

TABLE OF CONTENTS

DIFFERENCES BETWEEN PV-7664 and PV-7662

Comparison Chart Between PV-7664 & PV-7662
Mechanical Replacement Parts List ............................................................................................................. 3
Electrical Replacement Parts List ................................................................................................................ 3

DIFFERENCES BETWEEN PV-7664-K and PV-7662

Comparison Chart Between PV-7664-K & PV-7662
Mechanical Replacement Parts List ............................................................................................................. 3
Electrical Replacement Parts List ................................................................................................................ 3

EXPLODED VIEW

4. Chassis Frame and Casing Parts Section ............................................................................................... 4

REPLACEMENT PARTS LIST

Before Replacing Parts, Read the Following ............................................................................................... 5
Electrical Replacement Parts List ................................................................................................................ 5

COMMERCIAL ADVANCE OPERATION GUIDE .......................................................................................... 12

DISASSEMBLY/ASSEMBLY PROCEDURES

Disassembly/Assembly Procedures of Cabinet ......................................................................................... 13

ADJUSTMENT PROCEDURES

Test Points and Control Location ............................................................................................................... 15

SCHEMATIC DIAGRAMS

Main I (Power Supply/System Control/Servo) / Junction Schematic Diagram ........................................... 17
Main II (Signal Process/Audio) Schematic Diagram .................................................................................. 21
Main III (Power Supply) Schematic Diagram ............................................................................................. 25
Main IV (Hi-Fi Audio) Schematic Diagram ................................................................................................. 29
Main V (Timer) Schematic Diagram ........................................................................................................... 33
Advance Schematic Diagram ..................................................................................................................... 37
Operation Schematic Diagram ................................................................................................................... 41
Interconnection Schematic Diagram .......................................................................................................... 44

CIRCUIT BOARD LAYOUT

Main (Power Supply/Signal Process/Audio

/Hi-Fi Audio/System Control/Servo/Timer) C.B.A. ................................................................................ 47

Advance C.B.A. .......................................................................................................................................... 51
Operation C.B.A. ........................................................................................................................................ 52

BLOCK DIAGRAMS

Advance Block Diagram ............................................................................................................................. 55
System Control Block Diagram .................................................................................................................. 56
Operation Block Diagram ........................................................................................................................... 57
Troubleshooting Hints ................................................................................................................................ 58