Table of Contents
Advertisement
This service manual provides service instructions for PTV Models WT-42311and WT-A42 using the VK20 chassis.
Service personnel should read this manual thoroughly before servicing this chassis.
This service manual includes:
1. Assembly and disassembly instructions for the front and rear cabinet components.
2. Servicing of the Lenticular Screen and Fresnel Lens.
3. Servicing printed circuit boards (PCBs).
4. CRT replacement procedure.
5. Electrical adjustments.
6. Chip parts replacement procedures.
7. Circuit path diagrams.
The parts list section of this service manual includes:
1. Cabinet and screen parts.
2. Electrical parts.
Schematic and block diagrams of the above listed models are included in this service manual for better under-
standing of the circuitry. PCB drawings are also included for easy location of parts and test points.
Many electrical and mechanical parts in television receivers have special safety related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be
obtained by using replacement components rated for higher voltage, wattage, etc.
Replacement parts which have special safety characteristics are identified in this service manual.
Electrical components having such features are identified by shading
type in the parts list of this service manual. The replacement for any safety part should be identical in value
and characteristics.
MODEL: WT-42311 / WT-A42
INTRODUCTION
PRODUCT SAFETY NOTICE
Page 5
on the schematic diagram and by bold
Advertisement
Table of Contents
