Pioneer PDP-4270XA Service Manual page 75

5
Flowchart of Failure Analysis for The Whole Unit
A
In the subsequent diagnostic steps, it is most likely that the multi base section is in failure.
Problems concerning video display
Is the panel mask properly
displayed?
Yes
Check with the animated slanting ramp mask.
Is the on-screen display (OSD)
properly displayed?
Yes
Check on the Factory menu.
Is an external video signal
displayed properly?
Yes
Problems concerning the audio output
Is the audio signal output?
Yes
Specific failure whose cause is
difficult to identify in the initial stage
5
6
No
Failure analysis for the
drive system ⇒ DR2
No
Failure analysis for the
DIGITAL Assy ⇒ DG1
No
Failure analysis for the
MAIN Assy ⇒ MA3
No Failure analysis for the
audio system ⇒ AU1
6
7
PDP-427XD
7
8
A
B
C
D
E
F
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