Read Sharp TU-32GD1E (serv.man8) Service Manual online
37
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No audio output (3) (On the reception of
TV br
oadcasting,
audio fr
om the SCAR
T terminal to the e
xternal de
vice)
No audio output (4) (A
udio fr
om e
xternal input terminals)
YES
NO
NO
YES
YES
No audio output from INPUT1
T
e
rminal.
No audio output from INPUT2 and
INPUT3 T
e
rminals
.
YES
Is output from Pins (27)(28) of
IC2501 (MSP) nor
mal?
Confir
m Pins (23)(27) of SC1102
thr
u Pins (16)(18) of IC3801.
Confir
m Pins (5)(7) of J2404 thr
u
Pins (23)(25) of IC3801.
Is the A
UDIO input signal to Pins
(56)(57) of IC2501 (MSP) nor
mal?
Chec
k output of Pins (33)(34) of
IC2501 (MSP) and per
ipher
al
circuits
.
Confir
m Pins (2)(6) of SC1102
thr
u Pins (9)(11) of IC3801.
Confir
m Pins (2)(6) of SC1101
thr
u Pins (2)(4) of IC3801.
Chec
k the D
VI-L/R signal betw
een
INPUT5-D
V1-A
UDIO-T
er
minal
(J1900) and AD-Connector
.
YES
Chec
k the signal of Pins (27)(28)
of IC2501 thr
u Pins (1)(3) of
SCAR
T2 (SC1102) and Pins
(22)(24) of SCAR
T3 (SC1102).
Q1105, Q1106, Q1110, Q1111
Chec
k Q1104, Q1107, Q1109 and
Q1112 of the A
udio-Mute circuit
and S-MUTE-LINE.
YES
Is output from Pins (24)(25) of
IC2501 (MSP) nor
mal?
YES
Chec
k the signal of Pins (24)(25)
of IC2501 thr
u Pins (1)(3) of
SCAR
T1 (SC1101).
Chec
k Q1101 and Q1102 of the
A
udio-Mute circuit and S-MUTE-
LINE.
No audio signals input from
INPUT1 thr
u INPUT4
T
e
rminals
.
YES
Is the signal input from each
ter
minal to IC3801 (A
V
-SW)
nor
mal?
<INPUT1>
Is the input signal (SL1/SR1) to
Pins (2)(4) of IC3801 (A
V
-SW)
nor
mal?
<INPUT2>
Is the input signal (SL2/SR2) to
Pins (9)(11) of IC3801 (A
V
-SW)
nor
mal?
<INPUT3>
Is the input signal (SL3/SR3) to
Pins (16)(18) of IC3801 (A
V
-SW)
nor
mal?
YES
<INPUT4>
Is the input signal (V4L/V4R) to
Pins (23)(25) of IC3801 (A
V
-SW)
nor
mal?
NO
Is the A
UDIO output signal (MAIN-
L/R) from Pins (52)(54) of IC3801
(A
V
-SW) nor
mal?
Replace IC3801 (A
V
-SW) and
chec
k per
ipher
al circuits
.
Replace IC3801 (A
V
-SW) and
chec
k per
ipher
al circuits
.
No audio signals input from the
INPUT5 D
VI-A
UDIO
T
e
rminal.
YES
<INPUT5>
Is the input signal (PC-L/R) to Pins
(29)(31) of IC3801 nor
mal?
NO
Is the A
UDIO output signal (MAIN-
L/R) from Pins (52)(54) of IC3801
(A
V
-SW) nor
mal?
Click on the first or last page to see other TU-32GD1E (serv.man8) service manuals if exist.