Read Sharp TU-32GD1E (serv.man8) Service Manual online
36
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No audio output (2) (On the reception of TV broadcasting)
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 "Selecting Speakers" set to "SPEAKER-A"?
···Set it "SPEAKER-A".
Is the SIF audio signal input to Pins
(67
)(69
)
of IC2
50
1
(MSP)?
No audio output on the reception of
UHF
/V
HF
.
Is the SIF signal output fro
m
Pin
(7
) of
T
UNER
(T
U1
1
0
1)?
Check the
T
UNER
(T
U1
1
0
1) and its
peripheral circuits.
Check the signal
L
INE of Pins
(33)
(34) of
IC2
50
1 thru Pins
(32)
(33) of IC2
5
14 and
peripheral circuits.
YES
YES
NO
NO
Check IC2
5
14 and peripheral circuits.
Confir
m
the connection of 1
b
it-AMP
and
replace it.
Check that SP-S
W
and 1
8
-RE
L
A
Y
signals
are co
m
ing to Pins
(1)
(2) of SF connector
.
YES
YES
YES
YES
Is the audio signal of Pins
(33)
(34) of IC2
50
1
(MSP) thru Pins
(32)
(33) of IC2
5
14
(CODEC) nor
m
al?
Is each audio output fro
m
Pins
(2
7
)(
2
8
) of
IC2
5
14 nor
m
al?
Is audio output of Pins
(2
7
)(
2
8
) of IC2
5
14
thru 1
b
it-AMP
input
(SA
/CNA1
0
1) nor
m
al?
Is output fro
m
1
b
it-AMP
(
SC
/CNA1
0
2)
nor
m
al?
Is rela
y
s
w
itching of the connector of
AUDIO-
I/
F P
W
B
(
SC
/P
600
3) thru R
Y
600
1
(Speaker
ON
/OFF s
w
itching) and R
Y
6000
(
Speaker
A
/B
s
w
itching) nor
m
al?
Check DISP
L
A
Y
-OU
T
PU
T
3
(SC
600
1) and
S
Y
S
T
EM-CA
B
L
E
(B
L
ACK).
NO
YES
YES
NO
NO
NO
NO
No audio output on the reception of D
T
V
.
Is the MAIN-
L
/R signal of Pins
(5
2)
(5
4) of
IC3
8
0
1 thru Pins
(56
)(57
) of IC2
50
1 co
m
ing
nor
m
all
y
?
Is the D
T
V
-L
/R signal co
m
ing to Pins
(59
)(6
1) of IC3
8
0
1
(A
V
-S
W
) nor
m
all
y
?
D
V
B
-T
-UNI
T
:
Is the
L
/R audio signal output
fro
m
Pins
(2
7
)(
2
9
) of P
8
90
3?
Check and replace peripheral circuits of
IC3
8
0
1
(A
V
-S
W
).
Confir
m
the connection of Pins
(2
7
) thru
(2
9
)
of MA-connector
(P3
8
0
2) and
B
/B
(
P
8
90
3).
Check IC
8
90
4 and peripheral circuits.
Check IC
8
905
and peripheral circuits.
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the
L
/R audio signal output to Pins
(9
1)
(95
) of IC
8
905
?
Is the digital signal input to Pins
(1
5
-1
7
)(
1
9
)
of IC
8
905
?
Check IC
88
0
1-
88
0
2, IC
88
0
4-
88
05
and
peripheral circuits.
heck the connection of SA
connector and to
1
b
it-AMP
.
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