Panasonic TH 37PX50U - Defective Board

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.
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.
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