CAS-1
31
3. Sound is not outputted from the speaker
Sound is not outputted from the speaker.
End
Yes
The voltage of the following is
+3.3
V.
AMP board: IC209 pin 1
Yes
Replace the parts of area surrounding
circuit of Q208, Q209 on the AMP board.
Test point (JL234) on the AMP board is
“H” (+3.3 V).
No
Yes
Replace the parts of area surrounding
circuit of IC209 on the AMP board.
No
Yes
Replace the parts of area surrounding
circuit of IC205 on the AMP board.
No
The voltage of the following is
+12
V.
AMP board: IC205 pin 4
Yes
Replace the parts of area surrounding
circuit of IC657, IC658 on the MAIN
board.
No
The signal of DAMP-DATA, DAC-BCK,
DAMP-LRCK is outputted from the
IC657, IC658 on the MAIN board.
Yes
Yes
Yes
Yes
Yes
Yes
Replace the complete AMP board.
No
The audio signal is outputted from the
IC210 pin 16, 17, 20, 21 on the AMP
board.
Yes
Replace the IC204 on the AMP board
and parts of area surrounding circuit.
No
Sound is outputted from the speaker.
Note:
Perform the operation check in the dotted
line frame in the state of connecting the
speakers of both left and right to this unit.
(Except for parts replacement and so on)
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