NEC DSC-3261HA Service Manual page 19

6. NO PIP
Check signal at
15, 16, 17, 18th pin
of IP03
NORMAL
Check/Replace
QCP01, QCP02,
QCP03, QCP07
Check signal at
27, 28, 29, 30th pin
of I701
Check signal at R,G,B
42,43,44th of I701
Check/Replace
I701
7. NO EXTERNAL AV(RF OK)
Check connection
of AV1, AV2, AV3, DVD
Check signal at 20,21,22
16, 17, 18th pin of I701
NORMAL
Check signal at R,G,B
42,43,44th of I701
ABNORMAL
ABNORMAL
18
Trouble Shooting Charts
Check
H sync & V sync
of IP03
Check signal at
24, 26, 28th pin
of IP03
Check
CVBS of IP01 &
input of PP02, PP03 &
AV PCB
Check/Replace
Zener Diode of
AV PCB