Hitachi 42PD8900TA Service Manual page 47

Main Picture [Main PWB Circuit]
No picture, no color or dark
Sub picture?
No
(Signal picture or Main picture )
Are waveform at
TP605(Y), TP606(Cb), and
TP607(Cr)?
No
Are waveforms at
64pin(Y), 62pin(Cb), and
60pin(Cr) of I601?
No
RGB Input or
Component Input?
(except 480i and 576i)
No
(Component Video for 480i,
576i/RF/Composit Video/S-Video)
Are waveforms at
72pin(Y), 74pin(Cb), and
76pin(Cr) of I601?
No
Are waveforms at
62pin(Y), 65pin(Cb), and
68pin(Cr) of I501?
No
RF or Composit Video ?
No
(Component Video for 480i,
576i/S-Video)
Component Video for
480i, 576i ?
No
(S-Video)
Are waveforms at
150pin(Y) and 158pin(C) of
I501?
No
Are waveforms at
44pin(Y) and 47pin(C) of
I201?
No
Check I201 and Input terminal
42PD8900TA
Yes(Sub picture)
Trouble of Sub picture
Yes
Check FC PWB
Yes
Check Q601, Q602, Q603
Yes
(RGB) or Component
Video except 480i and 576i)
Check I601
and Input terminal
Yes
Check I601
Yes
Check Q520, Q521, Q522
Yes (RF or Composit Video)
Yes
(Component Video
for 480i and 576i)
Yes
Check I501
Yes
Check Q207, Q217, Q218, Q219
Is
Yes
waveform at 148pin(CV) of
I501?
No
Is
Yes
waveform at 44pin(CV) of
I201?
Check Q207, Q217, Q219
No
Yes (RF)
RF Input?
No
(Composit Video)
Check I201 and Input terminal
Are waveforms at
152pin(Y), 162pin(Cb), and
170pin(Cr) of I501?
No
Are waveforms at
6pin(Y), 5pin(Cb), and
3pin(Cr) of I204?
No
Are waveforms at
8pin(Y), 11pin(Cb), and 16pin(Cr)
from AV1 or 9pin(Y), 14pin(Cb), and
1pin(Cr) from AV2 of
I204?
No
Check Input terminal
47
Check I501
Is
Yes
waveform at 63pin(CV)
of I201?
No
Check U101
Yes
Check I501
Yes
Check Q214, Q215, Q216
Yes
Check I204
Check I201