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5
[5] AUDIO SYSTEM
Flowchart of Failure Analysis for The Audio System
=> AU1
Has the sound been emitted from
the speakers?
Yes
Has the sound been emitted from
the Audio out terminal?
Yes
Has the sound been emitted from
the Headphones?
5
6
No
Is sound muting set?
No
Is the volume set to 0?
No
Is a headphone inserted?
No
Is a SPDIF signal input to IC7602
(DP TX)? (pin 6)
No
Is a SPDIF signal output from
IC5801 (MSP)? (pin 126)
No
A
Go to
.
No
Is a 12 V output from +12V_Reg
output of IC4308 normal?
Yes
Are signals output from IC5911,
IC5931?
(pins 1, 7)
No
Are signals input to IC5911,
IC5931?
(pins 2, 3, 5, 6)
44 45
No
A
Go to
.
No
Is sound muting set?
No
Is the volume set to 0?
No
Is a 5 V output from +5V_Reg
output of IC4310 normal?
Yes
Is a signal output from IC5971
(HP AMP) ?
(pins 1, 7)
46
No
Is a signal output from IC5801
(MSP)?
(pins 38, 39)
47
No
A
Go to
.
6
7
Yes
Cancel muting, then check again.
Yes
Raise the volume, then check
again.
Yes
Pull out headphone, then check
again.
Check around the IC7602 (DP TX) and the communication with the
Yes
microcomputer, and replace the System Cable.
Repair the failure points, then check again.
Yes
Check the IC5801 (MSP) and peripheral circuit and clock output of
X5801. Repair the failure points, then check again.
42
No
Check the IC4308 and peripheral circuit.
Repair the failure points, then check again.
Yes
Check the IC5911, IC5931 and peripheral circuit.
Repair the failure points, then check again.
43
Yes
Check the peripheral circuits and the communication with the
microcomputer.
If there was no problem, replace the IC5801 (MSP).
Yes
Cancel muting, then check again.
Yes
Raise the volume, then check again.
No
Check the IC4310 and peripheral circuit.
Repair the failure points, then check again.
Yes
Check the FFC (J201) between the MAIN BLOCK and FRONT_IO Assys.
If there was no problem, replace the IC5971 (HP AMP) or FRONT_IO Assy.
Yes
Check the IC5801 (MSP) and peripheral circuit and clock output of
X5801. Repair the failure points, then check again.
KRP-M01
7
8
A
B
C
D
E
F
53
8

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