Sharp LC-32DH65E, Руководство по обслуживанию

Страница: 43 / 124

LC
-
32DH65E/S, LC-37DH65E/S
4 – 4
<LC-32D65E/RU, LC-37D65E/RU>
The audio signal is not output (1)
No audio signal output from EXT1/EXT2 terminal.
Is there a audio output signal in pins (3/L-ch) and (1/R-ch) of
EXT1 (SC502)?
YES Check the setting of an external input device that connects with
EXT1.
Is there a audio output signal in pins (3/L-ch) and (1/R-ch) of
EXT2 (SC501)? YES Check the setting of an external input device that connects with
EXT2.
NO
<EXT1>
Is SC-MUTE [pin (67) of IC9101 (CPLD)] at H? YES Check the peripheral circuits of IC9101 and SC-MUTE.
(Q503, Q505, etc.)
<EXT2>
Is SC2-MUTE [pin (65) of IC9101 (CPLD)] at H? YES Check the peripheral circuits of IC9101 and SC2-MUTE.
(Q502, Q504, etc.)”
NO
<EXT1>
Is there a audio output signal in pins (39/SC1_OUT_L) and (38/
SC1_OUT_R) of IC503 (AV_SW)? YES Check the line between IC503 and SC502.
<EXT2>
Is there a audio output signal in pins (37/SC2_OUT_L) and (36/
SC2_OUT_R) of IC503 (AV_SW)? YES Check the line between IC503 and SC501.
NO
Check IC503 and its peripheral circuits.