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Disassembly instructions
A. Important note
This set is disconnected from the power supply through the converter transformer. An
isolating transformer is necessary to service operations on the primary side of the converter
transformer.
Back Cabinet Removal
Remove the screw residing on the back cabinet and carefully separate the back cabinet from
the front cabinet.
B. Picture tube handling caution
Due to high vacuum and large surface area of picture tube, great care must be exercised when
handling picture tube. Always lift picture tube by grasping it firmly around faceplate.
NEVER LIFT TUBE BY ITS NECK! The picture tube must not be scratched or subjected to
excessive pressure as fracture of glass may result in an implosion of considerable violence
which can cause personal injury or property damage.
Functions and working voltage of major IC pins
(Note: All the data below have been measured at Channel 1 with color bar signals. The
pictures and sounds are all set in the standard status)
1．WH2001
Pin No.
1
Tuning voltage output
2
UHF
3
VHF-H
4
VHF-L
5
B/G
6
D/K
7
I
8
M
9
Control button input
10
Control button output
11
Magnetic
12
PAL/NTSC
13
Ground
14
Relay
15
Pre-eyesight
Functions
Working voltage (V)
12
4.52
0
0
1
1
0
0 0
0
0
0
0
1
0
0
4.87
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