No sound comes out. (2)
No monitor audio output
YES
NO
NO
Is the audio output of monitor output set to
"Variable"?
Are audio output pins 37 and 36 (SC1_OUT_L/R)
of IC2501 (MULTI_SOUND_PROCESSOR)
normal?
Reset the audio output of monitor output to
"Fixed".
Check IC2501and its peripheral circuits.
NO
Are audio output pins 7 and 1 of IC2504
(EQ_AMP) normal?
Check IC2504 and peripheral circuits.
NO
YES
YES
YES
Are audio signals supplied to input terminal pins 2
and 5 and pins 14 and 15 of IC1108
(AUDIO_SW)?
Check between IC2504 and IC1108.
NO
YES
YES
Are audio output pins 3 and 13 of IC1108 normal?
YES
Is control signal supplied to pin 10 of IC1108
normal?
Check between IC1108 and MONITOR OUTPUT
terminal (J1106)?
Check IC1108 and its peripheral circuits.
No monitor audio output when receiving digital broadcasting
NO
NO
YES
Are digital audio signals supplied from the digital
unit to pins 10-13 of AV_UNIT connector
(FC_SC5401)?
Are signals I2SLRCLK, I2CDATA, I2SSCLK and
AUDMCLK supplied to pins 1-4 of IC5402(DAC)?
Check the digital unit.
Check between the connector (FC_SC5401) of
AV_UNIT and the periphery of IC5704.
NO
Are analog-converted audio signals sent to output
terminal pins 11 and 8 of IC5402?
Check IC5402 and its peripheral circuits.
NO
YES
YES
Does IC5401(AUD_AMP) function well?
Check IC5401and its peripheral circuits.
NO
YES
Are audio signals supplied to the input terminal
pins 1 and 4 and pins 11 and 12 of IC1108?
Check between IC5401 and IC1108.
(Q1107, Q1108, etc.)
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