Sc20 Or D20 Connector - Panasonic TH-37PX50U Technical Manual

Symptom 3: Picture Noise - Part of the previous picture remains on the screen.
Cause: There is no Erase Pulse in the Scan Drive Signal at pin 13 of connector
SC20/D20. The problem is the D board.
The approach to find the defective board is to check the pins of the connector listed in
the table below.

SC20 or D20 Connector

Pin 8
OK
NG
OK
OK
NG
Figure 60
Check point
Pin 9
OK
NG
NG
OK
NG
Table 14
77
Defect Board
Pin 13
OK
OK
OK
NG
NG
SC Board
D Board
D Board
D Board
D Board