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5. DIAGNOSIS
5.1 TROUBLESHOOTING
No sound comes out.
A
Analog sound
doesn't come out.
Digital sound comes out.
YES
B
C
No sound comes
out in any function.
YES
B
D
E
F
20
1
2
Neither optical
NO
or coaxial digital sound
comes out.
YES
IC104 (4, 10 pin)
Is the voltage
about 3.3V?
YES
Check the pattern
between
IC104 - IC2501.
No sound
NO
comes out for Music Server,
Internet Radio, iPod
or USB.
YES
Sound comes
out for Music Server and
Internet Radio, but no sound
comes out for iPod
and USB.
YES
No sound comes out
for iPod .
YES
Check the pattern
around IC1506.
N-50
2
3
NO
No light comes out.
YES
Check the pattern
between
IC104 - IC101.
NO
Check the pattern
between
IC104 – L2513.
NO
A
Sound comes
out for iPod and USB, but no
NO
sound comes out for
Music Server and
Internet Radio.
YES
Check the patterns
between
JA1502 - IC1506
and around IC1506.
NO
Is the signal detected
in the land of R1649(NM)?
YES
Failure in
IC1504
3
4
NO
Check the pattern
between
IC104 - JACK102.
NO
Check the path
between
IC1504 - IC2501
(signal name: NWSPDIF).
NO
Check the path
between
IC1504 - USB ASSY.
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