SC-NA30EB, SC-NA30EG, SC-NA30EE, SC-NA30GS, SC-NA30GSX, SC-NA30GN, SC-NA30P, SC-NA30PC - Panasonic Audio Service Manual Supplement (repair manual). Page 5

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No sound from AUX
[H] 3.3v at
PDET2_IC1001_4pin? 
Failure of DAMP IC1401 or 
IC1402, or Failure of Q1401 or 
Q1402
Failure of speakers
Failure by damaged coil
Is there digital 
waveform output 
at  IC1401_43pin?
Failure of IC1504
No sound from all 
speakers?
Check the damage of 
the speaker. Connect 
to another normally 
functionning unit.
Sound is normal?
Failure of DAMP IC1401 or IC1402
Is there digital 
waveform output 
at IC1501_7pin?
Is there 5V output 
at IC1504_3pin?
Failure of DAMP IC1401 or IC1402 
Is there AUX 
waveform at 
IC1504_13_14 pin?
Breaking wire between JK1902 -
P1901 - P1811 including FFC. 
Failure of IC1504
L1401-1406 are 
conductive by 
measuring the 
ohmmeter? 
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