Hitachi 42PD9700C, Service Manual

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5
42PD9700C/U & 55PD9700C/U
Teletext [Main P C B Circuit]
No Teletext
Sub picture?
(TV+Text)
Check FC P
C
B
Are
waveform at TP605(Y),
TP606(Cb), and
TP607(Cr)?
Are
waveforms at
64pin(Y), 62pin(Cb), and
60pin(Cr) of I601?
Are
waveforms at
72pin(Y), 74pin(Cb), and
76pin(Cr) of I601?
No
(Signal picture )
Yes
(Sub picture)
Check I601
Yes
Check I501
Yes
Check Q601, Q602, Q603
Yes
Yes
Check Q520, Q521, Q522
Yes
No
No
Are
waveforms at
62pin(Y), 65pin(Cb), and
68pin(Cr) of I501?
No
Are
waveforms at
172pin(R), 164pin(B), and
160pin(G) of I501?
No
Check FC PWB
Are
waveform at TP608(Y),
TP609(Cb), and
TP610(Cr)?
Are
waveforms at
42pin(Y), 44pin(Cb), and
46pin(Cr) of I601?
Are
waveforms at
78pin(Y), 80pin(Cb), and
2pin(Cr) of I601?
Check I601
Yes
Check I504
Yes
Check Q604, Q605, Q606
Yes
Check Q515, Q516, Q517
Yes
No
No
Are
waveforms at
21pin(Y), 22pin(Cb), and
23pin(Cr) of I504?
No
Are
waveforms at
35pin(R), 34pin(G), and
33pin(B) of I504?
No
Yes
Check QT03, QT04, QT05
Are
waveforms at
112pin(R), 113pin(G), and
114pin(B) of
IT01?
Is
waveform at
121pin(CV) of IT01?
Is
waveform at
44pin(CV) of I201?
Check QT01, QT02,
Q207, Q217,Q219
Check U101
Yes
Check IT01
Yes
Check I201
Yes
No
No
No
Is
waveform at
63pin(CV) of I201?
No
No
Yes