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LC-37XD10E/RU
No sound from an external input
device connected to EXT1
(SCART1).
<EXT1>
Is IN1-L audio signal sent from
pin (6) of SCART1 terminal
(J1101) to pin (53) of IC3701
(MSP)?
Is IN1-R audio signal sent from
pin (2) of SCART1 terminal
(J1101) to pin (54) of IC3701
(MSP)?
NO
Check pins (6) and (2) of
SCART1 and connection to an
external input device.
Check IC3701 or peripheral circuits.
No sound from external input devices (2) -1
No sound from an external
input device connected to
EXT2 (SCART2).
<EXT2>
Is IN2-L audio signal sent
from pin (27) of SCART2 ter-
minal (J1101) to pin (56) of
YES
IC3701 (MSP)?
Is IN2-R audio signal sent
from pin (23) of SCART2 ter-
minal (J1101) to pin (57) of
IC3701 (MSP)?
Check pins (27) and (23) of
SCART2 and connection to
an external input device.
Is the audio signal properly sent from pins (28) and (27) of IC3701 ?
NO
Is the audio signal of pins (1)
and (7) of IC303 (OP-AMP)
sent properly?
Is the audio output signal of
pins (13) and (16) of IC302/
IC301(MAIN-AMP) normal?
.
Check CONNECTOR(P301)
and SP-BOX(right and left).
YES
NO
YES
NO
YES
NO
YES
4 – 3
No sound from an external input
device connected to EXT3.
<EXT3>
Is IN3-L audio signal sent from
pin (3) of
J1201 terminal to pin (47) of
IC3701?
Is IN3-R audio signal sent from
pin (5) of J1201 terminal to pin
(48) of IC3701?
NO
Check pins 3 and 5 of EXT3
(J1201) and connection to an
external input device.
Check IC303 or peripheral circuits.
Check IC302/IC301 (MAIN-AMP), HEAD-
PHONE and peripheral circuits.
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