Read Sharp LC-45GD1E (serv.man29) Service Manual online
51
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No sound (2) (On the reception of TV broadcasting)
Is the SIF audio signal input to Pins (67)(69)
of IC2501 (MSP)?
No audio output on the reception of
UHF/VHF
.
Is the SIF signal output from Pin (7) of
TUNER (TU1
101)?
Check the
TUNER (TU1
101) and its
peripheral circuits.
Check the signal LINE of Pins (33)(34) of
IC2501 thru Pins (32)(33) of IC2514 and
peripheral circuits.
YES
NO
NO
Check IC2514 and peripheral circuits.
Confirm the connection of 1 bit-AMP
and
replace it.
Check the SP-SW and 1B-RELA
Y
signals
are coming to Pins (1)(2) of SF connector
.
YES
YES
YES
YES
Is the audio signal of Pins (33)(34) of IC2501
(MSP) thru Pins (32)(33) of IC2514
(CODEC) normal?
Is each audio output from Pins (28)(29) of
IC2514 normal?
Is audio output of Pins (28)(29) of IC2514
thru 1 bit-AMP
input (SA/CNA101) normal?
Is output from 1 bit-AMP
(SC/CNA102)
normal?
Is connector of
AUDIO-I/F PWB (SC/P6003)
thru Relay switching of R
Y6001 (SPEAKER
ON/OFF switching) and R
Y6000 (SPEAKER
A/B switching) normal?
Check DISPLA
Y
-OUTPUT3 (SC6001) and
SYSTEM-CABLE (BLACK).
NO
YES
YES
NO
NO
NO
NO
No audio output on the reception of DTV
.
Is the MAIN-L/R signal of Pins (52)(54) of
IC3801 thru Pins (56)(57) of IC2501 coming
normally?
Is the DTV
-L/R signal coming to Pins
(59)(61) of IC3801 (A
V
-SW) normally?
DVB-T
UNIT
: Is the L/R audio signal output
from Pins (27)(29) of P8903?
Check IC3801 (A
V
-SW) and peripheral
circuits.
Confirm the connection of Pins (27) thru (29)
of MA-connector (P3802) and B/B (P8903).
Check IC8904 and peripheral circuits.
Check IC8905 and peripheral circuits.
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the L/R audio signal output to Pins
(91)(95) of IC8905?
Is the digital signal input to Pins (15-17)(19)
of IC8905?
Check IC8801-8802, IC8804-8805,IC8601
and peripheral circuits.
Check the connection of SA
connector and
to 1 bit-AMP
.
1) Is a Headphone connected?
···Disconnect it.
2) In the MENU-Option, is "Audio Out" set to "Fixed"?
···Set it "Fixed".
3) In the MENU-Option, is "Centre Channel input" set to "of
f"?
···Set it "of
f".
4) In the MENU-Set up, is "Speaker Setup" set to "SPEAKER-A"?
···Set it "SPEAKER-A".
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