Read Sharp TU-32GD1E (serv.man8) Service Manual online
38
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No video output (1)
No INPUT1 output of the e
xter
nal input
system.
Is "INPUT1" selected with the "INPUT
SOURCE" b
utton of the remote controller?
Chec
k Pin (20) of SCAR
T1 (SC1101) thr
u
Pins (1)(3) of IC3801.
Select "INPUT1" with the "INPUT
SOURCE" b
utton of the remote controller
,
select Option-Input Select in the MENU
panel, and then select Signal
T
ype of the
input signal.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is the Composite
Video signal (CVS1) input
to input ter
minals Pins (1)(3) of IC3801 (A
V
-
SW)?
No INPUT2 output of the e
xter
nal input
system.
Is "INPUT2" selected with the "INPUT
SOURCE" b
utton of the remote controller?
Select "INPUT2" with the "INPUT SOURCE"
b
utton of the remote controller
, select
Option-Input Select in the MENU panel, and
then select Signal
T
ype of the input signal.
Chec
k Pin (20) of SCAR
T2 (SC1102) thr
u
Pins (8)(10) of IC3801.
Chec
k IC3801 (A
V
-SW) and per
ipher
al
circuits
.
Chec
k IC3801 (A
V
-SW) thr
u IC401/IC600.
Chec
k IC600 (LPF) thr
u IC601 (VPC).
Chec
k IC402 (3D-YC), IC502 (2D-YC) and
IC601 (VPC) thr
u IC3201 (L
VDS_TX), or
replace the main PWB
.
Chec
k IC3201 (L
VDS_TX) and per
ipher
al
circuits
.
Chec
k IC3201 thr
u SC3200.
YES
YES
YES
YES
Is the Composite
Video signal (CVS2) input
to input ter
minals Pins (8)(10) of IC3801 (A
V
-
SW)?
<On input of the Composite
Video signal>
Are MAIN-Video signal and SUB-Video signal output to Pins (56) and (44) of IC3801 (A
V
-SW) respectiv
ely?
<On input of the Composite
Video signal>
Are MAIN-Video signal and SUB-Video signal input to Pin (8) of IC401 (LPF) and Pin (2) of IC600 (LPF) respectiv
ely?
Is the
VIDEO signal input to input ter
minals
of Pin (8) of IC402 (3D-YC) and Pin (16) of
IC502 (2D-YC)?
(MAIN Video
System)
Is the digital video signal output from Pins
(124) thr
u (133) of IC402 and Pins (115) thr
u
(126) of IC502?
Are the digital video signal and H/V
-SYNC signal input to Pins (51) thr
u (78) and Pins (7) thr
u (10) of IC3201 (L
VDS_TX) respec
tiv
ely?
Is the digital video signal output to Pins (39) thr
u (49) of IC3201 (L
VDS_TX)?
Is the digital video signal output to Pins (3) thr
u (15) of L
V
Connector SC3200?
No prob
lem in the MAIN PWB
. Chec
k the
TMDS PWB
.
Is the input/output signal of Pins (9) thr
u (20) of IC3105 ~ Pins (21) thr
u (31) of IC3101 in the
TMDS PWB nor
mal?
Are the Connector SC3102 of DISPLA
Y_OUTPUT1 and the SYSTEM_CABLE nor
mal?
Chec
k the LCD_DISPLA
Y par
t.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Chec
k IC401 (LPF) thr
u IC402 (3D-
YC)/IC502 (2D-YC).
NO
Chec
k IC402 (3D-YC), IC502 (2D-YC) and
per
ipher
al circuits
.
NO
YES
YES
Is the
VIDEO signal input to the input
ter
minal Pin (72) of IC601 (VPC)?
(SUB Video
System)
Is the digital video signal output from Pins
(41) thr
u (50) of IC601?
Chec
k IC601 (VPC) and per
ipher
al circuits
.
Chec
k the input/output signal of
IC3105/IC3101 in the
TMDS PWB and
per
ipher
al circuits
.
Chec
k the Connector SC3102 of
DISPLA
Y_OUTPUT1 and the
SYSTEM_CABLE.
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