- 4 -
6. No ON SCREEN display
Check the waveform at pins 1 and 2 of
IC001.
Check the waveforms at pins
34 and 35 of IC001.
Check the waveforms at pin
61~64 of IC001.
Check the waveforms at pin
15~18 of IC501.
Replace IC501.
Check Q001 and Q002.
Check L001, L002, C001 and
C002.
Replace IC001.
Replace IC001.
R081~R088
R509~R512
normal
Yes
H-Sync/V-Sync waveform
OSD OSC
OSD output
OSD OSC
µ
-COM
No
abnormal
abnormal
abnormal
normal
normal
OSD IN
8. Auto Program Error
Check the voltage at pin 10
of IC004.
(With signal : 0V
No signal : 12V)
Check the voltage at pin 5 of
IC001.
Check pin 6 of IC004 and it's
peripheral circuit.
normal
abnormal
7. Sync. error
Check the waveform at pin 43
and 44 of IC501.
Check IC501.
Check Q504, C535, C537,
R536 and R537.
normal
abnormal
SYNC input
