No audio heard (2)
No external audio heard
<INPUT 2>
Is there the L-ch audio signal input from pin (30) of input terminal
TL511 to pin (39) of IC 3301?
Is there the R-ch audio signal input from pin (26) of input terminal
TL510 to pin(40) of 3301?
<INPUT 3>
Is there the L-ch audio signal input from pin (20) of in put terminal
TL508 to pin (35) of 3301?
Is there the R-ch audio signal input from pin (15) of input terminal
TL507 to pin (36) of IC3301?
YES
Is there the I2C signal input at pin (55), (56) of IC3301? NO Check IC3301 and its peripheral circuits.
YES
Is there audio signal inp ut at pin(4),(10) of IC1701? NO Check connection between IC3301 and IC1701 and its periph-
eral circuits.
YES
Is the L-ch audio signal output at pin(26),(27),(29),(30)of NO Check IC1701 and its peripheral circuits.
Is the R- ch audio signal output at pin(20),(21),(23),(24) of IC1701
YES
Are the audio signal L-ch and R-ch output at (1)/(2) and (3)/(4) of
P1701 normal?
NO C h eck circuit betwe en IC1701 & P1701 .
YES
Check speakers and their peripheral circuits.
IC1701
normal ?
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