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MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
This service manual provides service instructions for the V21, V21+ and V21++ PTV chassis types. The specific
models for each chassis type are listed below. Service personnel should read this manual thoroughly before servicing
these 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.
INTRODUCTION
V21 Chassis
V21+ Chassis
WS-48511
WS-65611
WS-55511
WS-65511
WS-B55
PRODUCT SAFETY NOTICE
V21++ Chassis
WS-55711
WS-65711
WS-65712
WS-73711
on the schematic diagram and by bold
Page 5
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