PIONEER PDP-4350SX/KUC
Manual de Servicio

1

2

3

4

A

No sound from the speakers (2/2)
A

Is it sound for every function that doesn't come out? No Has the signal arrived at CN8657? (23), (27)
B

No Has the signal arrived at CN8657? (31), (35) No Is a signal output from IC8002?

Check the flexible cables Yes between the AV BOARD Assy and MAIN BOARD Assy and between the MAIN BOARD Assy.

Yes Replace TUNER BOARD ASSY.

Check around IC8002 and No check the communications between IC8002 and the microcomputer.

Yes
C

Has the signal arrived at TP8662 and TP8669?

45 46
Yes Has the signal arrived at TP3512 and TP3513?

Check around IC8003, No check the buffer circuits and check the TUNER BOARD ASSY.

No Check the cable between the AV BOARD Assy and AUDIO AMP Assy.

47 48
Yes
D

Has the symptom been settled when the system cable is replaced? Yes

No

Replace AUDIO AMP ASSY.

Finishing troubleshooting

E

F

148
1 2

PDP-5050SX
3 4