Hitachi 55PD8800TA Service Manual page 50

Teletext
[Main PWB Circuit]
No Teletext
Sub picture?
(TV+Text)
No
(Signal
Are waveform at
TP605(Y), TP606(Cb), and
TP607(Cr)?
No
Are waveforms at
64pin(Y), 62pin(Cb), and
60pin(Cr) of I601?
No
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
Are waveforms at
172pin(R), 164pin(B), and
160pin(G) of I501?
55PD8800/37LD8800
Yes(Sub picture)
Yes
Check FC PWB
Yes
Check Q601, Q602, Q603
Yes
Check I601
Yes
Check Q520, Q521, Q522
Yes
Check I501
No
Are waveforms at
48pin(R), 47pin(G), and
46pin(B) of IT01?
No
Is waveform at
31pin(CV) of IT01?
No
Is waveform at
44pin(CV) of I201?
No
Is waveform at
63pin(CV) of I201?
No
Check U101
50
Are waveform at
TP608(Y), TP609(Cb), and
TP610(Cr)?
No
Are waveforms at
64pin(Y), 62pin(Cb), and
60pin(Cr) of I601?
No
Are waveforms at
78pin(Y), 80pin(Cb), and
2pin(Cr) of I601?
No
Are waveforms at
62pin(Y), 65pin(Cb), and
68pin(Cr) of I504?
No
Are waveforms at
35pin(R), 34pin(G), and
33pin(B) of I504?
Yes
Check QT03, QT04, QT05
Yes
Check IT01
Yes
Check QT01, QT02, Q207, Q217
Q218, Q219
Yes
Check I201
Yes
Check FC PWB
Yes
Check Q604, Q605, Q606
Yes
Check I601
Yes
Check Q515, Q516, Q517
Yes
Check I504