Audio System - Pioneer PDP-5010FD Service Manual

1

5.2.7 AUDIO SYSTEM

A
Flowchart of Failure Analysis for The Audio System
=> AU1
Has the sound been emitted from
the speakers?
Yes
B
C
D
Has the sound been emitted from
the Audio out terminal?
Yes
E
F
B
60
1
2
No
Is sound muting set?
No
Is the volume set to 0?
No
Is not headphone inserted?
Yes
Sound of all functions does not
output?
Yes
Check the speakers and speaker
cables. Is it no problem?
Yes
Is a voltage (+16.5 V) supplied to
IC9201?
Yes
Is not a signal output from
CN9251? (pins 2, 4, 5, 7)
42 43
Yes
Is not a PWM signal output from
IC9201?
44 45
(pins 34, 38, 46, 50)
Yes
Is not a PWM signal output from
IC9101?
46 47
(pins 52, 53, 54, 55)
Yes
Is a signal input to IC9101?
(pins 24, 25)
Yes
Has I2C communication signal
arrived at IC9101?
No
Is a 12 V output from +12V_Reg
output of IC9181 normal?
Yes
Are signals input to IC9151?
(pins 2, 3, 5, 6)
49 50
Yes
Are signals output from IC9151?
(pins 1, 7)
PDP-5010FD
2
3
Yes
Cancel muting, then check again.
Yes
Raise the volume, then check again.
No
Pull out headphone, then check
again.
No
A
Go to .
No
Replace the speakers or speaker
cables.
No
Check the cables (CN8806) from the main power and peripheral circuit.
Repair the failure points.
No
Check the CN9251 and peripheral circuit.
Repair the failure points.
No
Check between the LPF (L9255, L9256) and CN9251.
Repair the failure points.
No Check around the IC9101.
Repair the failure points.
No
Check between the input terminals and IC9101.
48
Repair the failure points.
No Check the peripheral circuits and the communication with the
microcomputer and clock output of X9101.
If there was no ploblem replace the MAP5601M.
Check the IC9181 and peripheral circuit.
Repair the failure points.
Check the peripheral circuits and the communication with the
microcomputer and clock output of X9101.
If there was no ploblem replace the MAP5601M.
Check the IC9151 and peripheral circuit.
Repair the failure points.
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3
4
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