Manual Structure
Purpose of this manual
This manual is the maintenance manual of Digital Videocassette Recorder DVW-
250/250P.
This manual describes the maintenance information of this unit, and the information
on primary services such as the replacement of main blocks and circuit boards.
Contents
The following is a summary of the sections for understanding the contents of this
manual.
Section 1 Service Overview
Explains the locations of main part, the functions of printed circuit board, the
removal and installation of cabinet, and the measures against trouble.
Section 2 Error Message
Explains the error messages.
Section 3 Maintenance Mode
Explains the maintenance mode of this unit.
Section 4 Overall Block Diagrams and Circuit Descriptions
Describes the overall block diagrams and the circuit descriptions.
Section 5 Periodic Maintenance and Inspection
Explains the cleaning procedures and periodic checks.
Section 6 Replacement of Mechanical Parts
Explains how to replace the parts that should replace periodically and how to adjust
them after the replacement.
Section 7 Tape Path Alignment
Explains the adjustment procedures of tape path system.
Section 8 Replacement of Circuit Boards
Explains how to replace the main boards.
Section 9 Electrical Alignment
Explains the general information for electrical adjustments and the electrical adjust-
ments of this unit.
Section 10 Spare Parts
Describes the exploded views for the unit and mounted/printed circuit boards list.
DVW-250/250P7 |
ACEC
SONY
