Service manual

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4. OSD Screen abnormal
OSD screen abnormal
Does 5.3V appear at IC501
Pin42?
Does pulse appear at
IC501 Pins52,53?
Check Power Circuit
5.3V(Line).
Check X301 inpulse.
Check pulse input at Q501
base.
Check Circuit(L506, R517,
C519, C518, R518).
Does pulse appear at
IC501 Pins50,51?
YES
YES
YES
Replace IC501.
YES
NO
5. F.OSD Screen abnormal
F.OSD abnormal
Refer to “(4)OSD screen
abnormal”.
Refer to AVCP C.SYNC
YES
Check C.SYNC Signal at
IC501 Pin87.
YES
Replace IC501.
YES
NO
NO
NO
NO