Panasonic gp8du gph8du th-37px50u th-42pd50u th-42px50u th-42px500u th-50px50u th-50px500u troubleshooting Service Manual
Symptom: Dark picture - Dark screen with a dim picture.
Cause:
There is no Sustain Control Pulse at pin 4 of the C or SS connector listed
below. The voltage Ve of the initializing and address period of Sustain
Drive Signal is missing.
below. The voltage Ve of the initializing and address period of Sustain
Drive Signal is missing.
The problem is the D board.
Figure 62
The approach to find the defective board is to check pin 4 of the connectors listed in the
table below.
table below.
Check Point
Model
Connector NO.
Pin NO.
37"HD
C32
42"SD
C23
42"HD
C32
50"HD
SS44
4
Defective Board
OK
SS Board
NG
D Board
Table 15
79