PIONEER PDP-507XC
Service Manual

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Flowchart of Failure Analysis for The Video-system Assy

A
No audio output from subwoofer SUB-W Has the sound been emitted from the SubWoofer? NO Is sound muting set? NO Is the volume set to [0]? NO Is a signal output from IC4701 ? (31) (32) 41 YES Has the signal arrived at CN4005? YES NO Check the around of IC4701 and each input signal. If there was no problem, replace IC4701. YES Raise the volume then check again. YES Cancel muting then check again.

B

NO

Check the communication between IC4701 to CN4005.

NG

Replace Main Ass'y

Is a signal output from CN9003 ? YES Is a signal output from IC9001? (1) (7) 42 YES Has the signal come to TP9051 ? YES

NO

Check the Flexible cable between CN4005 and CN9003.

NG

Replace or reconnect flexible cable

NO

Check around IC9001.

NG

Replace Main Ass'y

NO

Check the contact between the CN9003 and R9042.

NG

Replace TANSHI Ass'y

C

Check the around of pin Jack.

*100Hz input. Sound volume is fixed to 25.

� Waveforms
41
IC4701 (31)(32)AC-SUBWOO V:200mV/div H:4msec/div
Stop

42
IC4701 (31)(32)DC-SUBWOO
Stop

IC4704 (1)(7)AC-SUBWOO V:200mV/div H:4msec/div
Stop

IC4704 (1)(7)DC-SUBWOO
Stop

D

E

F

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PDP-507XC
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