Read Sharp LC-37LE320E Service Manual online
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
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The audio signal is not output (3)
↓
No audio signal output from LINE_AUDIO_OUTPUT terminal.
TEREMINAL UNIT:
↓
↓NO
↓NO
The audio signal is not output (4)
↓
No audio signal output from SPDIF_OUTPUT terminal.
TEREMINAL UNIT:
↓NO
The audio signal is not output (5)
↓
No sound from HEADPHONE_OUTPUT terminal.
MINI AV_UNIT:
↓
↓YES
↓YES
↓YES
↓YES
Is audio signal output from IC U401 is sent to pin (2)(1IN-) and pin
(6)(2IN-)of IC U107?
(6)(2IN-)of IC U107?
Is audio signal output from IC U107 sent to pin(4)
(Audio_Line_Out_L) and pin (6) (Audio_Line_Out_R) of
LINE_AUDIO_OUT connector(CN140)?
(Audio_Line_Out_L) and pin (6) (Audio_Line_Out_R) of
LINE_AUDIO_OUT connector(CN140)?
YES
Check the connection to LINE_AUDIO_OUT and external
devices.
devices.
YES
Check the line between IC U401 and IC U107.
Check IC U401 and its peripheral circuits.
Check IC U401 and its peripheral circuits.
Is ASPDIF audio signal output from pin (K33) of IC U401 to pin (2)
of connector CN603?
of connector CN603?
YES
Check the connection to SPDIF_OUT and external devices.
Is the audio signal output from IC U602 to pin(2) (HPOUTL) and pin
(3) (HPOUTR) of headphone terminal CN602?
(3) (HPOUTR) of headphone terminal CN602?
Is the HP_DET# signal input into pin (AE6) of IC U401 from pin (6)
of a headphone terminal (CN602)?
of a headphone terminal (CN602)?
NO
Check the connection to CN602 and external headphone is plug
in well.
in well.
NO
Check the line between IC U602 and CN602.
Check IC U401 and its peripheral circuits.
Is the audio signal output from IC U401 pin(V35) and pin(U34) sent
to pin(1)(INL-) and pin(4)(INR-) of IC U602?
to pin(1)(INL-) and pin(4)(INR-) of IC U602?
NO
Check the line between IC U401 and IC U602.
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