MODEL: WD-57831 / WD-65831 / WD-73831
Page 5
INTRODUCTION
This service manual provides service instructions for the V33Y and V33+ chassis type. The specfic models for each
chassis type, dimensions and weight are listed below. Service personnel should read this manual thoroughly before
servicing these chassis.
This service manual includes:
1. Assembly and disassembly instructions for cabinet and chassis components.
2. Servicing of the Lenticular Screen and Fresnel Lens.
3. Servicing printed circuit boards (PCBs).
4. Electrical and Mechanical 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 understanding
of the circuitry.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in television receivers have special safety related characteristics. These charac-
teristics 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 on the schematic diagram and parts list of this
service manual, and by marking on the supplementary sheet for this chassis to be issued subsequently.
Therefore,
the replacement for any safety part should be identical in value and characteristics.
Pb Solder
The PWBs used in the V34 chassis are constructed using Lead-Free solder.
When servicing use
only recommended Lead-Free solder (refer to page 3
9
).
V34 Chassis
MODEL
CHASSIS
HEIGHT
WIDTH
DEPTH
WEIGHT
POWER
USAGE
WD-57831
V34
36.3"
51.5"
18"
96 lbs
250W
WD-65831
"
40.8"
58.5"
19.8"
103.7 lbs
250W
WD-73831
"
44.8"
70.3
21.5
204lbs
250W
Summary of Contents for WD-57831
Page 2: ......
Page 29: ...MODEL WD 57831 WD 65831 WD 73831 Page 29 73 Models Lamp Lamp Control Circuitry ...
Page 53: ...Page 53 MODEL WD 57831 WD 65831 WD 73831 MAIN POWER SUPPLY ...
Page 55: ...Page 55 MODEL WD 57831 WD 65831 WD 73831 POWER DISTRIBUTION ...
Page 56: ...MODEL WD 57831 WD 65831 WD 73831 Page 56 PWB SIGNAL VIDEO PATH ...
Page 57: ...Page 57 MODEL WD 57831 WD 65831 WD 73831 PWB DM Video Path ...
Page 58: ...MODEL WD 57831 WD 65831 WD 73831 Page 58 Sound Select Circuitry ...
Page 59: ...Page 59 MODEL WD 57831 WD 65831 WD 73831 Sound Signal Path ...
Page 60: ...MODEL WD 57831 WD 65831 WD 73831 Page 60 Overall Control Circuitry ...
Page 61: ...Page 61 MODEL WD 57831 WD 65831 WD 73831 Command input Circuit ...
Page 64: ...MODEL WD 57831 WD 65831 WD 73831 Page 64 Auto Input Detection ...
Page 65: ...Page 65 MODEL WD 57831 WD 65831 WD 73831 Short Protect Circuit ...