Hitachi 42PD7200 Service Manual page 33

Trouble of Sub picture
Are waveforms at
TP68(Y), TP69(Cb)
and TP6A(Cr) ?
NO
Are waveforms at
42pin(Y), 44pin(Cb)
and 46pin(Cr) of I601?
NO
Component or
RGB-Video Input ?
NO
(RF/Composite Video/
S-Video/HDMI)
HDMI Input ?
NO
(RF/Composite Video/S-Video)
Are waveforms at
78pin(Y), 80pin(Cb)
and 2pin(Cr) of I601?
NO
Are waveforms at
21pin(Y), 22pin(Cb)
and 23pin(Cr) of I502?
NO
RF Input or Composite
Video Input ?
NO
(S-Video)
Are waveforms at
44pin(Y) and 43pin(C)
of I502?
NO
Are waveforms at
56pin(Y) and 58pin(C)
of I201?
NO
Check I201 and Input terminal
42PD7200 (PW2)
YES
Check Formatter PWB
YES
Check Q607, Q608 and Q609
YES (Component Video/RGB-Video)
Check I601 and Input terminals
YES (HDMI)
YES
Check I601
YES
Check Q508, Q509 and Q510
YES (RF/Composite Video)
YES
Check I502
YES
Check Q512 and Q513
Are waveforms at
25pin(Y), 27pin(Cb)
and 29pin(Cr) of I601?
NO
Check HDMI PWB
Is waveform at
1pin(CV) of I502?
NO
Is waveform at
53pin(CV) of I201?
NO
RF Input ?
NO
(Composite Video)
Check I201 and Input terminal
32
YES
Check I601
YES
Check I502
YES
Check Q209 and Q511
YES (RF)
Check I201 and SUB-TUNER PWB