Hitachi 42PD7200 Service Manual page 34

Synchronization
[Video PWB Circuit]
No Sync or Invalid Sync
Sub picture ?
NO
(Single picture or Main picture)
Are waveforms at
TP61(H) and
TP62(V) ?
NO
Are waveforms at
61pin(H) and 58pin(V)
of I601?
NO
Component Input ?
NO
(RF/Composite Video/
S-Video/RGB-Video/HDMI)
RGB-Video Input ?
NO
(RF/Composite Video/
S-Video/HDMI)
HDMI Input ?
NO
(RF/Composite Video/S-Video)
Are waveforms at
31pin(H) and 32pin(V)
of I601?
NO
NTSC or PAL ?
<RF/Composite Video>
NO
(S-Video/SECAM)
SECAM ?
<RF/Composite Video>
NO
(S-Video)
Is waveform at
44pin(Y) of I501?
NO
Is waveform at
44pin(Y) of I201?
NO
Check I201 and Input terminal
YES (Sub picture)
Trouble of Sub picture
YES
Check Formatter PWB
YES
Check I602
YES (Component Video)
Check I601 and Input terminals
YES (RGB-Video)
Is waveform at
68pin(CV) of I601?
NO
Is waveform at
44pin(CV) of I501?
NO
Is waveform at
44pin(CV) of I201?
NO
Check I201 and Input terminal
YES (HDMI)
YES
Check I601
YES (NTSC/PAL<RF/Composite Video>)
YES (SECAM<RF/Composite Video>)
Is waveform at
44pin(CV) of I501?
Is waveform at
YES
44pin(CV) of I201?
Check I501 and Q211
YES
Check Q504 and Q211
42PD7200 (PW2)
YES
Check I601
YES
Check I501, Q211 and Q518
YES
Check Q211 and Q504
Is waveform at
YES
25pin(Y) of I601?
NO
Check HDMI PWB
YES
Check I501
NO
YES
Check Q211 and Q504
NO
33
Check I601
Is waveform at 5pin(Y)
of I501?
NO
Is waveform at
TP32(Y)?
NO
Is waveform at
TP31(CV) ?
NO
Is waveform at
44pin(CV) of I201?
NO
RF Input ?
NO
(Composite Video)
Check I201 and Input terminal
YES
Check I501
YES
Check Q304, Q305 and Q306
YES
Check I302
YES
Check Q211, Q301, Q302, Q303
YES (RF)
Check I201 and TUNER PWB