Pioneer KRP-500P Service Manual page 53

5
[4] DIGITAL ASSY
Flowchart of Failure Analysis for The DIGITAL Assy
Failure analysis for the
DIGITAL Assy => DG1
The on-screen display (OSD) is
not properly indicated.
Disconnect and reconnect the
50P (J212) FFC/40P (J211) FFC.
NG
Replace the 50P (J212) FFC/
40P (J211) FFC.
NG
Is an appropriate signal input?
(Check the V frequency with the
QSI command.)
No
Is the sync signal properly output
from the MAIN Assy?
No
• It is most likely that the video signal
and sync signal data are abnormal.
Failure analysis for the
MAIN Assy => PM3
5
6
• If the OSD is not properly displayed although the panel mask is properly displayed,
a failure exists in the path from the output of IC4001-IC4004 on the MAIN Assy to IC3301 on the DIGITAL Assy.
-> If only the OSD is abnormal, the MAIN Assy is in failure.
Yes
• If no vertical sync signal is input to the DIGITAL Assy,
a freeze-frame picture will be displayed.
Yes
Replace the DIGITAL Assy.
NG OK
Failure in connectors CN3201 or
CN3202 on the DIGITAL Assy.
Failure in ASIC (IC3301) on the
DIGITAL Assy.
6
7
KRP-500P
7
8
A
B
C
D
E
F
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