Hitachi 42PD8900TA Service Manual page 51

Teletext [Main PWB Circuit]
No Teletext
Sub picture?
(TV+Text)
No
(Signal picture )
Are
Yes
waveform at TP605(Y),
TP606(Cb), and
TP607(Cr)?
No
Are
waveforms at
Yes
64pin(Y), 62pin(Cb), and
60pin(Cr) of I601?
Check Q601, Q602, Q603
No
Are
waveforms at
Yes
72pin(Y), 74pin(Cb), and
76pin(Cr) of I601?
No
Are
waveforms at
Yes
62pin(Y), 65pin(Cb), and
68pin(Cr) of I501?
Check Q520, Q521, Q522
No
Are
waveforms at
Yes
172pin(R), 164pin(B), and
160pin(G) of I501?
42PD8900TA
Yes
(Sub picture)
Check FC PWB
Check I601
Check I501
No
Are
waveforms at
Yes
48pin(R), 47pin(G), and
46pin(B) of IT01?
Check QT03, QT04, QT05
No
Is
Yes
waveform at
31pin(CV) of IT01?
No
Is
Yes
waveform at
44pin(CV) of I201?
No
Is
Yes
waveform at
63pin(CV) of I201?
No
Check U101
Are
Yes
waveform at TP608(Y),
TP609(Cb), and
TP610(Cr)?
No
Are
waveforms at
Yes
42pin(Y), 44pin(Cb), and
46pin(Cr) of I601?
Check Q604, Q605, Q606
No
Are
waveforms at
Yes
78pin(Y), 80pin(Cb), and
2pin(Cr) of I601?
No
Are
waveforms at
Yes
62pin(Y), 65pin(Cb), and
68pin(Cr) of I504?
Check Q515, Q516, Q517
No
Are
waveforms at
Yes
35pin(R), 34pin(G), and
33pin(B) of I504?
Check IT01
Check QT01, QT02,
Q207, Q217,Q219
Check I201
51
Check FC PWB
Check I601
Check I504