Read Sharp LC-37RD2E (serv.man5) Service Manual online
LC-32RD2E/RU, LC-37RD2E/RU
4 – 6
No sound except from speakers (3)
No audio output from AUDIO_OUTPUT terminal.
Checklist:
1) Is the MUTE button on the remote control set to ON?
••• Set to OFF.
2) Check the connection to external devices.
••• Is there any improper connection?
Is audio signal sent to pins (13) (L-ch) and (15) (R-ch) of
AUDIO_OUTPUT (J1201)?
YES
Check the connection to AUDIO_OUTPUT external (J1201) and
external devices.
external devices.
NO
Is S-MUTE-LINE [IC2301 (62)] at H?
YES
Check the peripheral circuits of IC2301 and S-MUTE_LINE.
(Q1204, Q1203, etc.)
(Q1204, Q1203, etc.)
NO
Is audio signal sent from pins (22) (L-ch) and (21) (R-ch) of
IC3001?
IC3001?
NO
Check IC3001 or peripheral circuits.
YES
Check the audio signal output line from pins (22) (L-ch) and (21)
(R-ch) of IC3001 to pins (13) (L-ch) and (15) (R-ch) of
AUDIO_OUTPUT. (Q1202, Q1201, etc.)
(R-ch) of IC3001 to pins (13) (L-ch) and (15) (R-ch) of
AUDIO_OUTPUT. (Q1202, Q1201, etc.)
DTV troubleshooting
The unit does not enter the DTV mode. Or, the DTV menu does
not appear.
YES
Go to “The unit does not enter the DTV mode. Or, the DTV menu
does not appear.”
does not appear.”
NO
No video output during DTV reception.
YES
Go to “No video output during DTV reception. Colour of image
are not right.”
are not right.”
NO
No audio output during DTV reception.
YES
Go to “No audio output during DTV reception. Sound is low”
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