Sharp lc-32rd8 Service Manual page 48

LC-32RD8E/S/RU-BK/GY (1st Edition)
No sound from HEADPHONE_OUTPUT terminal.
Is the HP_PLUG signal input into pin(208) of
MAIN_UNIT's IC3001 (MAIN_MICON) from pin(6) of a
HEADPHONE_OUTPUT terminal J1003?
Is the audio signal output to pins(2/L-ch), (3/R-ch) of
HEADPHONE_OUTPUT terminal J1003?
Is the audio signal input into pins(3/L-ch), (1/R-ch) of con-
nector SC1001 from pins(3/L-ch), (1/R-ch) of connector
P1001?
Is HP-MUTE-LINE [pin(40) of IC2302(SUB_MICON)] at
H?
Is audio signal sent to pins(26/L-ch), (25/R-ch) of
IC3001(MAIN_MICON)?
Check IC3001 and its peripheral circuits.
The audio signal is not output (4)
YES
YES
NO
YES
NO
YES
NO
YES
NO
NO
Check the line between J1003 and IC3001.
(SC1001/P1001, IC3001, etc.)
Check HEADPHONE (J1003) or peripheral circuits.
Check the line between P1001 and J1003.
(SC1001/P1001, etc.)
Check the peripheral circuits of IC2302 and HP-MUTE_LINE.
(Q1001, etc.)
Check the line between P1001 and IC3001.
(IC1002, etc.)
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