PDM-4220
29
Synchronization
[Video PWB Circuit]
No Sync or Invalid Sync
Trouble of Sub picture
Sub picture ?
YES (Sub picture)
Are waveforms at
TP61(H) and
TP62(V) ?
NO
(Single picture or Main picture)
Check Formatter PWB
YES
NO
Are waveforms at
61pin(H) and 58pin(V)
of I601?
Check I602
YES
NO
Component Input ?
Check I601 and Input terminals
YES (Component Video)
NO
(RF/Composite Video/
S-Video/RGB-Video/HDMI)
RGB-Video Input ?
NO
(RF/Composite Video/
S-Video/HDMI)
Is waveform at
68pin(CV) of I601?
YES (RGB-Video)
Check I601
YES
Is waveform at
44pin(CV) of I501?
Check I501, Q211 and Q518
YES
NO
NO
Check I201 and Input terminal
Is waveform at
44pin(CV) of I201?
Check Q211 and Q504
YES
NO
Are waveforms at
31pin(H) and 32pin(V)
of I601?
Check I601
YES
NO
NTSC or PAL ?
<RF/Composite Video>
YES (NTSC/PAL<RF/Composite Video>)
NO
(S-Video/SECAM)
SECAM ?
<RF/Composite Video>
YES (SECAM<RF/Composite Video>)
NO
(S-Video)
HDMI Input ?
YES (HDMI)
NO
(RF/Composite Video/S-Video)
Is waveform at
25pin(Y) of I601?
Check I601
Check HDMI PWB
YES
NO
Is waveform at
44pin(Y) of I501?
Check I501 and Q211
Is waveform at
44pin(Y) of I201?
YES
NO
Check Q504 and Q211
Check I201 and Input terminal
YES
NO
Is waveform at 5pin(Y)
of I501?
Check I501
Is waveform at
TP32(Y)?
YES
NO
Check Q304, Q305 and Q306
YES
NO
Is waveform at
44pin(CV) of I501?
Check I501
YES
NO
Is waveform at
44pin(CV) of I201?
Is waveform at
TP31(CV) ?
Check I302
YES
NO
Check Q211, Q301, Q302, Q303
RF Input ?
YES
NO
Check I201 and TUNER PWB
YES (RF)
NO
(Composite Video)
Check I201 and Input terminal
Is waveform at
44pin(CV) of I201?
Check Q211 and Q504
YES
NO
C
C
Summary of Contents for PDM-4220
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Page 35: ...PDM 4220 35 Block diagram ...
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