Hitachi 42PD8900TA Service Manual page 48

Sub Picture [Main PWB Circuit]
Trouble of Sub picture
Are waveform at
TP608(Y), TP609(Cb), and
TP610(Cr)?
No
Are waveforms at
42pin(Y), 44pin(Cb), and
46pin(Cr) of I601?
No
Component Input?
No
(RF/Composit
Video/S-Video)
Are waveforms at
78pin(Y), 80pin(Cb), and
2pin(Cr) of I601?
No
Are waveforms at
21pin(Y), 22pin(Cb), and
23pin(Cr) of I501?
No
RF or Composit Video ?
No
(S-Video)
Are waveforms at
44pin(Y) and 43pin(C) of I504?
No
Are waveforms at
56pin(Y) and 58pin(C) of I201?
No
Check I201 and Input terminal
42PD8900TA
Yes
Check FC PWB
Yes
Check Q604, Q605, Q606
Yes
(Component Video except 480i and 576i)
Check I601
and Input terminal
Yes
Check I601
Yes
Check Q515, Q516, Q517
Yes
(RF or Composit Video)
Yes
Check I504
Yes
(Composit Video)
Check I201 and Input terminal
Check Q512, Q513
Is
Yes
waveform at 1pin(CV) of
I504?
No
Is
Yes
waveform at 53pin(CV)
of I201?
No
Check Q206 and Q511
Yes (RF)
RF Input?
No
48
Check I504
Is
Yes
waveform at 63pin(CV) of
I201?
No
Check I201
Check U102