NEC DSC-3261HA, Service Manual

Page: 19 / 45

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