Introduction - Sony CTV-25R1 Manual

Sony TV Models Covered by this Manual
Purpose
The purpose of this book is to:
•
Show through diagrams and explanation how the Sony Trinitron Picture tube now works because it has evolved since inception in
1968.
•
Provide organized, simplified diagrams that provide an insight to understanding the necessities of the circuit's operation. This is an
essential aid to rapidly determining the cause of a failure.
•
Explain the circuit operation and provide tips for troubleshooting where needed. Some parts of the circuit are used only under certain
conditions of operation. It is important to know when these additional parts affect the main circuit during operation and how they affect
the main circuits if they are defective.
•
Provide some voltages from a working production run set that are not supplied in the service manual. These can be compared to the
non-working unit you are repairing to determine where the fault is.
•
Explain the new self diagnostic circuit:
1. How to access it
2. How it works,
3. When to use it
4. The circuits that support it
Note:
This note is common to all schematics and block diagrams.
All capacitors are uf unless otherwise noted.
All resistors are ohms unless otherwise noted.
All voltages are dc unless otherwise noted.
BA-4 Chassis – Current Models Covered
KV13M40 KV20M40
KV13M50 KV20M40
KV13M51 KV20S40
KV20S41
KV20V80

Introduction

KV27S40 KV27V40
KV27S45 KV27V45
KV27S65 KV27V65