PIONEER PDP-R04C/TA
Service Manual

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No sound from the speakers (2/2)
A

A

No sound from the sub-woofer No

Is it sound for every function that doesn't come out? No

Is sound muting set? No

Yes

Cancel muting then check again.

Is a signal output from IC8002?

B
Yes
B

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

Is the volume set to 0? No Are the headphones connected? No Is a signal output from IC8003? (3), (13)

Yes

Raise the volume then check again.

Yes

Has the signal arrived at TP8668 and TP8667?

No Check around IC8003 and check the buffer circuits.

Disconnect the headphones then check again.

45 46
Yes Has the signal arrived at TP9301 and TP9303?

B
Check the flexible cables No between the AV BOARD Assy and MR MAIN BOARD Assy

No Check around IC8003 and

34 35
Yes

B
No

check each input signal.

47 48
Yes Has the symptom been settled when the system cable is replaced? Yes

B
No

and between the MR MAIN BOARD Assy and MDR Assy.

Is a signal output from IC8008? (7), (10) Yes

36 37

B
No

Check around IC8008.

C

The panel is defective.

Is a signal output from IC8007? (1), (7)

Check around IC8007.

38 39
Yes

B
No

Finishing troubleshooting

Has the signal arrived at TP7710?

Check around Q7761.

49
Yes

B

Check around the jack.
D

E

F

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PDP-R04E
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