Sharp Aquos LC-32D44E, Service Manual

Page: 47 / 142

LC32D44E/S/RU-BK/GY (1st Eddition)
4 – 7
The audio signal is not output (1)
No audio signal output from SCART1 terminal.
Is audio signal sent to pins (3/L-ch) and (1/R-ch) of
SCART1(SC1102)?
YES
Check the connection to SCART1 and external devices.
NO
Is S-MUTE-LINE [pin(62) of IC2302(SUB_MICON)] at H?
YES
Check the peripheral circuits of IC2302 and S-MUTE_LINE.
(Q1101, etc.)
NO
Is audio signal sent to pins (24/L-ch) and (23/R-ch) of
IC3001(MAIN_MICON)?
YES
Check the line between SC1102 and IC3001.
(Q1106, Q1105, etc.)
NO
Check IC3001 and its peripheral circuits.
The audio signal is not output (2)
No audio signal output from SCART2 terminal.
Is audio signal sent to pins (3/L-ch) and (1/R-ch) of
SCART2(SC1101)?
YES
Check the connection to SCART2 and external devices.
NO
Is S2-MUTE-LINE [pin(63) of IC2302(SUB_MICON)] at H?
YES
Check the peripheral circuits of IC2302 and S2-MUTE_LINE.
(Q1102, etc.)
NO
Is audio signal sent to pins (22/L-ch) and (21/R-ch) of
IC3001(MAIN_MICON)?
YES
Check the line between SC1101 and IC3001.
(Q1108, Q1107, etc.)
NO
Check IC3001 and its peripheral circuits.