Read Sharp LC-32D44E (serv.man5) Service Manual online
LC-32D44E/S/RU-BK/GY
4 – 8
The audio signal is not output (3)
NO
No audio signal output from AUDIO_OUTPUT terminal.
Is audio signal output to pin(2/L-ch), (4/R-ch) of audio out-
put terminal J1304?
put terminal J1304?
YES
Check the connection to J1304 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.
(Q1303, etc.)
(Q1303, etc.)
NO
Is audio signal sent to pins (22/L-ch) and (21/R-ch) of
IC3001(MAIN_MICON)?
IC3001(MAIN_MICON)?
YES
Check the line between J1304 and IC3001.
(Q1302, Q1301, etc.)
(Q1302, Q1301, etc.)
NO
Check IC3001 and its peripheral circuits.
The audio signal is not output (6)
No sound from HEDPHONE_OUTPUT terminal.
Is the HP_PLUG signal input into pin (208) of
MAIN_UNIT's IC3001 (MAIN_MICON) from pin (6) of a
headphone terminal (J1003)?
MAIN_UNIT's IC3001 (MAIN_MICON) from pin (6) of a
headphone terminal (J1003)?
NO
Check the line between J1003 and IC3001.
(SC1001/P1001, IC3001, etc.)
(SC1001/P1001, IC3001, etc.)
YES
Is the audio signal output to pin(2/L-ch) pin(3/R-ch) of
headphone terminal J1003?
headphone terminal J1003?
YES
Check HEAD-PHONE (J1003) or peripheral circuits.
NO
Is the audio signal input into pin (3) and (1) of connector
SC1001 from pin(3/L-ch),(1/R-ch) of connector P1001?
SC1001 from pin(3/L-ch),(1/R-ch) of connector P1001?
YES
Check the line between P1001 and J1003.
(SC1001/P1001, etc.)
(SC1001/P1001, etc.)
NO
Is HP-MUTE-LINE [pin(40) of IC2302(SUB_MICON)] at
H?
H?
YES
Check the peripheral circuits of IC2302 and HP-MUTE_LINE.
(Q1001, etc.)
(Q1001, etc.)
NO
Is audio signal sent to pins (26/L-ch) and (25/R-ch) of
IC3001(MAIN_MICON)?
IC3001(MAIN_MICON)?
YES
Check the line between P1001 and IC3001.
(IC1102, etc.)
(IC1102, etc.)
NO
Check IC3001 and its peripheral circuits.
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