Sharp AQUOS LC-42AD5E, Руководство по обслуживанию

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LC-42AD5E/RU/S
4 – 3
No sound from external input devices (1)
No sound from an external input device connected to EXT1
(SCART1).
<EXT1>
Is IN1-L audio signal sent from pin (6) of SCART1 terminal
(J1101) to pin (14) of IC3002 (VCT)?
NO
Check pins (6) and (2) of SCART1 and connection to an external
input device.
Is IN1-R audio signal sent from pin (2) of SCART1 terminal
(J1101) to pin (13) of IC3002 (VCT)?
YES
Refer to “No sound output in all modes”.
No sound from external input devices (2)
No sound from an external input device connected to EXT2
(SCART2).
<EXT2>
Is IN2-L audio signal sent from pin (27) of SCART2 terminal
(J1101) to pin (12) of IC3002 (VCT)?
NO
Check pins (27) and (23) of SCART2 and connection to an exter-
nal input device.
Is IN2-R audio signal sent from pin (23) of SCART2 terminal
(J1101) to pin (11) of IC3002 (VCT)?
YES
Refer to “No sound output in all modes”.
No sound from external input devices (3)
No sound from an external input device connected to EXT3.
<EXT3>
Is IN3-L audio signal sent from pin (3) of J1201 terminal to pin
(16) of IC3002 (VCT)?
NO
Check pins (3) and (5) of EXT3 (J1201) and connection to an
external input device.
Is IN3-R audio signal sent from pin (5) of J1201 terminal to pin
(15) of IC3002 (VCT)?
YES
Refer to “No sound output in all modes”.
No sound from external input devices (4)
No sound from EXT4 (AUDIO) connecting an external input
device.
<EXT4>
Is D-SUB-L audio signal sent from J2702 to pin (15) of IC2704
(SW)?
NO
Check the line between J2702 and IC2704.
(Q2703, Q2706, etc.)
Is D-SUB-R audio signal sent from J2702 to pin (2) of IC2704
(SW)?
YES
Is D-SUB-L audio signal sent to pin (10) of IC3002?
Is D-SUB-R audio signal sent to pin (9) of IC3002? NO Check the line between IC2704 and IC3002.
YES
Refer to “No sound output in all modes”.