Read Sharp TU-32GD1E (serv.man8) Service Manual online
33
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
No power supply (Front LED is not ON)
Is power cable properly connected to the main unit?
Is F701 normal?
Is F702 normal?
Reconnect the wire harness, FFC, etc. in the set, and repeat
the check.
the check.
Connect the power cable properly, and turn on the power.
Replace F701, and turn on the power. If the fuse is still
blown, replace VZ701, D701, Q705 and Q706, and repeat
blown, replace VZ701, D701, Q705 and Q706, and repeat
Replace F702, and turn on the power. If the fuse is still
blown, replace D701 and IC701, and repeat the check.
blown, replace D701 and IC701, and repeat the check.
Remove the faulty part or short-circuit, and repeat the check.
Check IC902 and its peripheral
NO
NO
NO
Is there any faulty part or short-circuit in BU+5V line?
NO
NO
YES
YES
Is BU+5V line (PI/CN901) normal?
YES
YES
YES
No power-up (Front LED does not change from red to green)
Are MDR (gray) and DVI (white) connectors of the system
cable properly connected to the monitor and the AVC center?
cable properly connected to the monitor and the AVC center?
Reconnect properly and turn on the power.
NO
Is the power switch of the monitor ON?
Set the power switch to ON, and turn on the power.
YES
NO
Is specified voltage available at S-Vcc+15V (pins (11) and
(12) of PA/P1752), UR+10V (pin (5) of PA/P1752) and
BS+10V (pins (7) and (8) of DP/P1781)?
(12) of PA/P1752), UR+10V (pin (5) of PA/P1752) and
BS+10V (pins (7) and (8) of DP/P1781)?
Is specified voltage available at D+1.8VCV (pins (3) and (4)
of PB/P1703), D+3.3V (pins (9) and (12) of PF/P1701), D+5V
(pin (1) of DP/P1703) and UR+6V (pin (7) of PF/P1701)?
of PB/P1703), D+3.3V (pins (9) and (12) of PF/P1701), D+5V
(pin (1) of DP/P1703) and UR+6V (pin (7) of PF/P1701)?
Reconnect the wire harness, FFC,
etc. in the set, and repeat the check.
etc. in the set, and repeat the check.
Are PS_ON (pin (6) of PF/P1701) and EU_D_POWER (pin
(2) of PG/P1702) at "HI" (3V or higher)?
(2) of PG/P1702) at "HI" (3V or higher)?
Are MOS-FET (Q1701, Q1702, Q1703, Q1704 and Q1705)
and IC952 normal?
and IC952 normal?
Does OVP line pin (2) of PF/P1701
voltage fluctuate immediately after
the power is supplied?
voltage fluctuate immediately after
the power is supplied?
Is specified impedance available in S-Vcc+15V, UR+10V and
BS+10V lines? (Measure the resistance between each +B
line and GND.)
BS+10V lines? (Measure the resistance between each +B
line and GND.)
Check PS_ON or EU_D_POWER
Check the circuits in the faulty line.
Check D_POW line (pin (8) of
PF/P1701).
PF/P1701).
Is D_POW line normal? Are the pins
(45),(46), (47) and (48) of IC1701 at
"HI", and the pin (5) of IC952 at
"LOW"?
(45),(46), (47) and (48) of IC1701 at
"HI", and the pin (5) of IC952 at
"LOW"?
Replace faulty FET or IC.
YES
NO
NO
NO
YES
YES
YES
YES
NO
Replace IC1701.
YES
YES
NO
NO
NO
34
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No audio output (1) (Output from external terminals)
No Head phone sound output.
Are output from Pins (26)(27) of IC2514
(CODEC) and Pins (1)(7) of "HP-R/L-
IN"~IC2502 (HP_AMP) and the Q2501
(HP_MUTE) circuit normal?
Check the Headphone terminal (J2402) and
peripheral circuits.
No audio output from External Speakers.
In the
AUDIO-IF PWB : Is RELA
Y
R
Y6000
normally operated?
In the
AUDIO-IF PWB : Is the "H" signal
coming to "SP-SW" of Pin (1) of SF-
Connector?
In the
A
V
PWB : Is the "H" signal output to
Pin (6) of IC3808?
In the
A
V
PWB : Confirm IC3808 SDA3-
LINE and peripheral circuits.
Is "Selecting speakers" in the MENU-Set
up set to "SPEAKER-B"?
If not, set the "SPEAKER-B".
No audio output from Optical-Audio-OUT
(IC1
109).
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
YES
Check the "HP-PLUG" signal Line.
Check Pin (4) of Headphone (J2402) thru
Pin (1
1) of IC2509.
Replace IC1
109 or check peripheral circuits.
Check the SPDIF signal from Pin (40) of
MA-Connector (P3802) and Pin (15) of B/B-
Connector (P8903).
Replace IC8903 or check peripheral circuits.
Replace IC8601 or check peripheral circuits.
Replace IC2507 (OPT
-SW) or check
peripheral circuits.
NO
NO
NO
NO
NO
Is output from Optical-Fiber
T
ransmitter
(IC1
109) normal?
Is input into Pin (12) of IC2507 (OPT
-SW)
normal?
In the DVB-T
PWB : Is output from Pin (2) of
IC8903 (INV) coming?
Is output from Pin (AC16) of IC8601
(Processor) normal?
Is output from Pin (8) of IC2507 (OPT
-SW)
normal?
35
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No audio output (2) (On the reception of TV broadcasting)
No monitor audio output.
1)
Is
a
He
adp
h
on
e
c
onn
ec
te
d
?
···D
isc
onn
ec
t it.
2)
I
n t
he
ME
N
U-O
ption
, i
s
"A
udio
O
ut
"
se
t to
"F
ixe
d
"?
···Se
t it
"F
ixe
d
".
3)
I
n t
he
ME
N
U-O
ption
, i
s
"Ce
ntr
e
Ch
ann
el
input
"
se
t to
"o
ff"?
···Se
t it
"o
ff
".
4)
I
n t
he
ME
N
U-Se
t up
, i
s
"Selec
tin
g
S
p
e
a
ke
rs"
se
t to
"SPEAKER-A"?
···Se
t it
"SPEAKER-A"
.
YES
NO
NO
NO
NO
YES
YES
YES
NO
In t
he
AUDIO-IF
P
WB
:
Is
t
he
AUDIO
s
ig
na
l
c
omin
g
to
RE
L
A
Y
R
Y6000
and
R
Y600
1?
In t
he
AUDIO-IF
P
WB
:
Is
t
he
AUDIO
s
ig
na
l input to
SC-C
onn
ec
tor
(P
600
3)?
Is
t
he
AUDIO
s
ig
na
l input to t
he
1
b
it
-
AMP
U
N
IT
?
Is
t
he
AUDIO
s
ig
na
l output to
P
in
s
(2
7
)(
2
8
) o
f
IC2
5
14?
C
on
firm
IC2
5
14
(
CODEC),
IC2
5
0
1
(
MSP)
and p
e
rip
he
ra
l
c
ir
c
uit
s
.
Is
t
he
AUDIO
s
ig
na
l output to
DISP
L
A
Y
-
OU
T
PU
T
3
(
SC
600
1)?
Is
t
he
c
onn
ec
tion o
f
S
y
s
te
m
c
a
b
le
(
b
la
ck)
norma
l?
(M
onitor
S
id
e)
M
onitor
S
id
e
:
Is
t
he
AUDIO
s
ig
na
l input
to
AUDIO-C
onn
ec
tor
(J
22
0
1)
and
SO-
C
onn
ec
tor
(P22
0
1)?
M
onitor
S
id
e
:
Is
t
he
c
onn
ec
tion o
f
SO-
C
onn
ec
tor
(P22
0
1)
and
SP-
te
rmina
l
(P2
0
3)
in t
he
SP-U
N
IT
norma
l?
A
re
t
he
c
onn
ec
tion in t
he
SP-KUMI
and
the
S
p
e
a
ke
r norma
l?
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
.
