Flowchart Of Failure Analysis Forthe Audio System - Pioneer PDP-507XC Service Manual

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4.1.2 FLOWCHART OF FAILURE ANALYSIS FORTHE AUDIO SYSTEM

Flowchart of Failure Analysis for The Audio-system Assy
No sound from panel
AU1 Has the sound been emitted
from the SP?
YES YES
Has the sound been emitted
from the monitor-out terminal?
YES YES
D
1
2
NO NO YES YES Cancel muting, then check
Is sound muting set?
NO NO
YES YES Turn up the volume, then
Is the volume set to 0?
NO NO
YES YES Pull out the headphone,
Is the headphone inserted?
NO NO
Does no sound come from the NO NO
speaker for all functions?
YES YES
Is there any problem in the YES YES Replace the speakers or
speakers or speaker cables?
NO NO
Is there any problem in the YES YES Replace the cables or
cables or connectors
between the MAIN Assy and
AUDIO Assy?
NO NO
Is a signal output from NO NO
IC4701?(35)(36)
communication between IC4701 and microcomputer.
43 44
YES YES
Has the signal arrived at NO NO
CN4007?
YES YES
Has the signal arrived at NO NO
TP3778 and TP3772? communication between IC3753 and microcomputer.
YES YES If there is no problem, replace the AUDIO Assy.
Has the signal arrived between
NO NO
TP3789 and TP3790 and communication between IC3751and microcomputer.
between TP3787 and TP3788? If there is no problem, replace the AUDIO Assy.
YES YES
Finishing troubleshooting
NO NO NO NO
Is a signal output from Check the surrounding of IC4701 and each
IC4701?(33)(34)
45
YES YES
Has the signal arrived at NO NO Check the communication between IC4701
CN4005?
YES YES
Is a signal output from NO NO Check the Flexible cable between CN4005
CN9003?
YES YES
Check the contact between the CN9003
NO NO
Has the signal come to
Check the contact between the CN8803
TP9080 or TP9081?
YES YES
NO NO Check the communication between the
Is a signal output from jack.
YES YES
If there was no problem replace IO Assy
Finishing troubleshooting
2
3
again.
check again.
then check again.
Go to
A
speaker cables.
connectors.
Check IC4701 and peripheral circuits and the
If there is no problem, replace the MAIN Assy.
Check the circuit between CN4007 and
IC4701, and repair the failure points.
Check IC 3753 and peripheral circuits and the
Check IC3751 and peripheral circuits and the
input signal. If there was no problem
replace IC4701.
NG NG
and CN4005.
NG NG
and CN9003.
and R9037,R9038. NG NG
and R8887
NG NG
CN9003 and Jack.
PDP-507XC
3
Replace Main Ass'y
Replace or reconnect flexible
cable.
Replace TANSHI Ass'y
Replace TANSHI Ass'y
4
A
B
C
D
E
F
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