Pioneer PDP-507XC Service Manual page 24

1
Flowchart of Failure Analysis for The Audio-system Assy
A
B
PDP-427/507XDA Only
Is the sound of the Digital
broadcasting emitted?
YES
B
C
Is the sound of the side input
emitted?
YES
Is the sound of the audio input
emitted?
D YES
Is the sound of PC output?
YES
Finishing troubleshooting
E
F
24
1
2
NO
Is a picture is Displayed?
YES
Has the signal arrived at CN4014 ?
(7)(9)
YES
Has the signal arrived at IC4701?
(19) (20)
YES
Is a signal output from IC4701?
(35) (36)
YES
Has the signal arrived at CN4007?
YES
Is a signal output from CN3752?
YES
Is a sound output from Audio Ass'y?
YES
Check the speakers and speaker cables.
NO Check the cables between CN9002 and
CN9205 and between CN9001 and CN9202,
and check around the pin jack.
YES
NO Check the FFC between CN8801 and
CN4004 or between CN9003 and CN4005,
and check around the input terminal.
OK
51 52
Is a signal input to IC4701?
YES
NO
Has the signal arrived to CN9003 ?
YES
Check the Flexible cable between
CN9003 and CN4005.
YES
Is a signal input to IC4701?
YES
2
3
NO
Check digital channel broadcasting.
NO
Replace DTV Ass'y
NO Check the communication between IC4701
to CN4014.
NO
Check around IC4701.
NO
Check the communication between
IC4701 and CN4007.
NO Check the Flexible cable between
CN4007 and CN3752.
NO
Check the communication between
Audio ass'y and the microcomputer. If
it's no problem replace Audio Ass'y.
NO NG
Replace the cables.
NG Replace or reconnect flexible
cable
NO Check between the input terminal
and CN4004 or CN4005, and
repair the failure points.
NO Check the communication between Jack
and CN9003.If it's no problem, replace
IO Ass'y
NO
Replace or reconnect flexible cable
NO Check the communication between CN4005
and IC4701 and replace broken parts.
PDP-507XC
3
4
NG
Replace Main Ass'y
NG
Replace Main Ass'y
NG
Replace Main Ass'y
NG
Replace Main Ass'y
NG Replace or reconnect flexible
cable
Replace cable between Side ass'y
and Side Ass'y.
4
C