Read Sharp TU-X1E (serv.man7) Service Manual online
TU-X1E/RU
6 – 8
)
No sound except from speakers (4)-1
Check the IC1304 (CODEC) power, SDA1
and soldering.
and soldering.
No sound heard from Headphone (J101).
NO
NO
Is the audio output signal outputted from pins
(2) and (3) of Headphone terminal (J101)?
(2) and (3) of Headphone terminal (J101)?
Is the audio mute signal at pins (2) and (5) at
the base of Q1301 set at "H"?
the base of Q1301 set at "H"?
Is the HP audio signal (HP_LSS_L/R)
outputted properly from pins (40) and (42) of
IC1302 (S-PROCESSOR)?
outputted properly from pins (40) and (42) of
IC1302 (S-PROCESSOR)?
What is the sound source of the headphone?
Check the connection between the Headpho-
ne terminal (J101) and the external device.
ne terminal (J101) and the external device.
YES
Make sure that the HP-MUTE line signal
from PA connector or the MUTE-A-ALL line
signal is not at "H".
from PA connector or the MUTE-A-ALL line
signal is not at "H".
YES
Check the IC1312 (CODEC) power, X1303
and soldering.
and soldering.
YES
Check pinpoint the cause of the trouble,
from the tuner or from an external device.
from the tuner or from an external device.
Is the audio output signal (HP_L/R) outputted
properly from pins (30) and (29) of IC1312
(CODEC)?
properly from pins (30) and (29) of IC1312
(CODEC)?
NO
NO
Check the VE harness and the connectors
(P102, P1301).
(P102, P1301).
YES
No sound heard from DIGITAL AUDIO
(D2406).
(D2406).
No sound except from speakers (4)-2
Is the optical audio signal (S/PDIF_OUT)
outputted properly from pin (60) of IC1302
(S-DSP)?
outputted properly from pin (60) of IC1302
(S-DSP)?
What is the sound source of digital audio?
Is the optical audio output signal (OPT-OUT)
outputted from pin (23) of IC1304 (CODEC)?
outputted from pin (23) of IC1304 (CODEC)?
Check IC2404, MA connector and
soldering.
soldering.
NO
YES
YES
NO
NO
(FRONT-UNIT)
(
TERMINAL-UNIT)
(
TERMINAL-UNIT)
(
TERMINAL-UNIT)
(MAIN-UNIT)
Check pinpoint the cause of the trouble,
from the tuner or from an external device.
from the tuner or from an external device.
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