Digital Assy - Pioneer PDP-5020FD Service Manual

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[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.
Replace the MAIN Assy.
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 IC2801 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.
No
Replace the DIGITAL Assy.
NG OK
Failure in connectors CN3201 or
CN3202 on the DIGITAL Assy.
Failure in ASIC (IC3301) on the
DIGITAL Assy.
PDP-5020FD
6
7
7
8
A
B
C
D
E
F
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