Sharp Aquos LC-37D90U, Руководство по обслуживанию

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LC-37D90U
6 – 12
Check the SC502 and SC1102
connectors.
YES
NO
Check the line between
IC1508 and IC1403 and their
peripheral circuits.
[INPUT-1] Does the audio signal come from
pins (2) and (4) of SC1102 to pins (53)(L) and
(54)(R) of IC1403 (CODEC)?
[INPUT-2] Does the audio signal come from
pins (10) and (12) of SC1102 to pins (57)(L)
and (58)(R) of IC1403 (CODEC)?
No audio in all modes (3)
YES
NO
Check the line between SC1102
and IC1403 and their peripheral
circuits.
Is there the audio signal output at pins (38)(L) and (39)(R) of IC1403?
NO
Check IC1403 and its peripheral circuits.
YES
Is there the audio signal output at pins (8)(L) and (11)(R) of connector
(SC1301) on the main unit?
NO
Check the line between IC1407 and SC1301.
YES
Is there the audio signal input at pins (8)(L) and (11)(R) of connector
(P2704) on the IF unit?
NO
Check the SC1301 and P2704 connectors.
YES
Is there the audio signal input at pins (11)(L) and (15)(R) of IC2701
(STEREO_AMP)?
NO
Check the line between P2704 and IC2701, and their
peripheral circuits (MUTE circuit: Q2701 and AMP_MUTE
line)
YES
Is the audio output from IC2701 as specified?
NO
Check IC2701 and its peripheral circuits.
YES
Does the speaker select relay (T2701) function?
NO
Check the SP-RELAY line and its peripheral circuits (Q2702
and SP-RELAY line).
YES
Check the connector (P2703), speakers and their peripheral circuits.