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Picture
[Video PWB Circuit]
No picture, no color or dark
YES (Sub picture)
Sub picture ?
NO
Trouble of Sub picture
(Single picture or Main)
Are waveforms at
YES
TP65(Y), TP66(Cb)
and TP67(Cr) ?
Check Formatter PWB
NO
Are waveforms at
YES
64pin(Y), 62pin(Cb)
and 60pin(Cr) of I601?
Check Q603, Q604 and Q605
NO
YES (Component Video/RGB-Video)
Component or
RGB-Video Input ?
Check I601 and Input terminals
NO
(RF/Composite Video/
S-Video/HDMI)
YES (HDMI)
HDMI Input ?
NO
(RF/Composite Video/S-
Video)
Are waveforms at
YES
72pin(Y), 74pin(Cb)
and 76pin(Cr) of I601?
NO
Are waveforms at
YES
21pin(Y), 22pin(Cb)
and 23pin(Cr) of I501?
Check Q508, Q509 and Q510
NO
A
<RF/Composite Video>
(S-Video/SECAM)
<RF/Composite Video>
44pin(Y) and 43pin(C)
44pin(Y) and 47pin(C)
Check I201 and Input terminal
Are waveforms at
YES
25pin(Y), 27pin(Cb)
and 29pin(Cr) of I601?
NO
Check HDMI PWB
Check I601
A
YES (NTSC/PAL<RF/Composite Video>)
NTSC or PAL ?
NO
YES (SECAM<RF/Composite Video>)
SECAM ?
NO
Is waveform at
(S-Video)
44pin(CV) of I501?
NO
Is waveform at
Are waveforms at
YES
44pin(CV) of I201?
of I501?
NO
Check I501
NO
Are waveforms at
YES
of I201?
Check Q211, Q504
and Q505
NO
Check I601
YES
Check I501
YES
Check Q211 and Q504
Are waveforms at
YES
5pin(Y) and 7pin(C) of
I501?
Check I501
NO
Are waveforms at
YES
TP32(Y) and
TP33(C)?
Check Q304, Q305, Q306, Q307,
Q308, Q309,Q501,Q503
NO
YES
Is waveform at
TP31(CV) ?
Check I302
NO
YES
Is waveform at
44pin(CV) of I201?
Check Q211, Q301, Q302, Q303
NO
YES (RF)
RF Input ?
NO
Check I201 and TUNER PWB
(Composite Video)
Check I201 and Input terminal
PDM-4220
27
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