Read Sharp LC-52XD1E (serv.man5) Service Manual online
LC-46/52XD1E-RU
6 – 2
No sound (1) (during the reception of TV broadcasting)
No audio output during UHF/VHF reception
Checklist:
1) Is the volume set to MIN or MUTE on the remote control ? ... Set the desired volume.
2) Are headphones connected to HEADPHONE (J1301 ) ? ... Disconnect them.
3) Is ANT-CABLE disconnected or connected improperly ? ... Connect it correctly as per the operation manual.
1) Is the volume set to MIN or MUTE on the remote control ? ... Set the desired volume.
2) Are headphones connected to HEADPHONE (J1301 ) ? ... Disconnect them.
3) Is ANT-CABLE disconnected or connected improperly ? ... Connect it correctly as per the operation manual.
Is the audio signal (L/R)
sent from pins (28) and
(27) of IC3701 (MSP)?
sent from pins (28) and
(27) of IC3701 (MSP)?
NO
Is the SIF signal
(ANA_IN1+) sent to pin
(67) of IC3701(MSP)?
(ANA_IN1+) sent to pin
(67) of IC3701(MSP)?
YES
Check whether +5V and
+8V are supplied to pins
(12) and (39) of IC3701
respectively. Or,check
peripheral circuits.
+8V are supplied to pins
(12) and (39) of IC3701
respectively. Or,check
peripheral circuits.
(AV-UNIT)
YES
NO
Is the audio signal of pins
(3) and (5) of IC303 (OP-
AMP) sent properly?
(3) and (5) of IC303 (OP-
AMP) sent properly?
NO
Check SC2704
and P1201 or
peripheral circuits.
Is the S-MUTE sig-
nal “L” ?
and P1201 or
peripheral circuits.
Is the S-MUTE sig-
nal “L” ?
Is the audio signal (SIF)
sent from pin (1) of CON-
NECTOR (SC2705)?
sent from pin (1) of CON-
NECTOR (SC2705)?
YES
Check pin (67) of IC3701
(MSP) and peripheral cir-
cuits.
(MSP) and peripheral cir-
cuits.
YES
(TUNER)
NO
Is the audio signal of pin
(4) Of IC301/IC302
(AUDIO-AMP) sent prop-
erly?
(4) Of IC301/IC302
(AUDIO-AMP) sent prop-
erly?
NO
Check HEAD-
PHONE
(J1301) or periph-
eral circuits.
PHONE
(J1301) or periph-
eral circuits.
Is the audio signal (SIF)
sent from Q210 (Buffer)?
sent from Q210 (Buffer)?
YES
Check CONNEC-
TOR(P201) and periph-
eral circuits.
TOR(P201) and periph-
eral circuits.
YES
NO
Is the audio signal output
of pins (2) and (4) of P301
(AUDIO-CONNECTOR)
normal ?
of pins (2) and (4) of P301
(AUDIO-CONNECTOR)
normal ?
NO
Check P301
(AUDIO- CON-
NECTOR) and
peripheral circuits.
(AUDIO- CON-
NECTOR) and
peripheral circuits.
Is the SIF signal sent to
Q203 (AMP)?
Q203 (AMP)?
YES
Confirm whether +8V is
supplied to Q203. Or,
please check the periph-
eral circuit.
supplied to Q203. Or,
please check the periph-
eral circuit.
YES
NO
Check SP-BOX (right and
left) and wire harness.
left) and wire harness.
Is the SIF signal sent from
pin (13) of TUNER
(TU201)?
pin (13) of TUNER
(TU201)?
YES
Check soldering the ter-
minal
and peripheral circuits.
minal
and peripheral circuits.
NO
Check whether 5V (ANT )
and 5V are supplied to
pins (4) and (10) of
TUNER (TU201) respec-
tively. Check SDA/SCL
and AGC signal.
and 5V are supplied to
pins (4) and (10) of
TUNER (TU201) respec-
tively. Check SDA/SCL
and AGC signal.
YES
Replace TUNER
(TU201).
(TU201).
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