Read Sharp LC-52XL1E (serv.man3) Service Manual online
LC-46XL1E/RU, LC-52XL1E/RU
4 – 4
No sound from external input devices (2) -2
No sound from EXT4 (AUDIO) connect-
ing an external input device.
ing an external input device.
No sound from EXT5 (AUDIO) connect-
ing an external input device.
ing an external input device.
<EXT4>
Is D-SUB-L audio signal sent from J2702
to pin (15) of IC2704?
Is D-SUB-R audio signal sent from J2702
to pin (2) of IC2704?
Is D-SUB-L audio signal sent from J2702
to pin (15) of IC2704?
Is D-SUB-R audio signal sent from J2702
to pin (2) of IC2704?
<EXT5>
Is HDMI-L audio signal sent from J2701
to pin (14) of IC2704?
Is HDMI-R audio signal sent from J2701
to pin (5) of IC2704?
Is HDMI-L audio signal sent from J2701
to pin (14) of IC2704?
Is HDMI-R audio signal sent from J2701
to pin (5) of IC2704?
YES
YES
Is D-SUB-L audio signal sent to pin (50)
of IC3701?
Is D-SUB-R audio signal sent to pin (51)
of IC3701?
of IC3701?
Is D-SUB-R audio signal sent to pin (51)
of IC3701?
Is HDMI-L audio signal sent to pin (50) of
IC3701?
Is HDMI-R audio signal sent to pin (51) of
IC3701?
IC3701?
Is HDMI-R audio signal sent to pin (51) of
IC3701?
NO
Check output of pins (13) and (3) of
IC2704 and peripheral circuits.
IC2704 and peripheral circuits.
YES
YES
Is the audio signal properly sent from pins (28) and (27) of IC3701?
NO
Check IC3701 or peripheral circuits.
YES
Is the audio signal of pins (1) and (7) of
IC303 (OP-AMP) sent properly?
IC303 (OP-AMP) sent properly?
NO
Check IC303 or peripheral circuits.
YES
Is the audio output signal of pins (13) and
(16) of IC302/IC301 (MAIN-AMP) nor-
mal?
(16) of IC302/IC301 (MAIN-AMP) nor-
mal?
NO
Check IC302/IC301 (MAIN-AMP),
HEADPHONE and peripheral circuits.
HEADPHONE and peripheral circuits.
YES
Check CONNECTOR(P301) and
SP-BOX (right and left).
SP-BOX (right and left).
Click on the first or last page to see other LC-52XL1E (serv.man3) service manuals if exist.