Sharp LC-45GD1E (serv.man29) Service Manual ▷ View online
53
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (2)
No INPUT3 output of the external input
system.
<On input of the Composite V
ideo signal and COMPONENT>
Is "INPUT3" selected with the "INPUT
SOURCE"
button ( ) of the remote controller?
Check Pin (41) of INPUT3 (SC1
102) thru
Pins (15)(17) of IC3801.
Check Pins (3)(8)(12) of the INPUT3-
COMPONENT
terminal thru Pins
(15)(17)(19) of IC3805.
Select "INPUT3" with the "INPUT
SOURCE"
button ( ) of the remote controller
, select
Option-Input Select in the MENU item, 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 V
ideo signal (CVS3) input
to input terminals Pins (15)(17) of IC3801
(A
V
-SW)?
<COMPONENT
video signal input>
Are there the
Y/PB/PR input signals at pins
(15), (17) and (19) of IC3805?
No INPUT4 output of the external input
system.
Is "INPUT4" selected with the "INPUT
SOURCE"
button ( ) of the remote controller?
Select "INPUT4" with the "INPUT
SOURCE" button
( ) of the remote controller
, select Option-Input
Select in the MENU item, and then select Signal
T
ype of the input signal.
Check IC3801 (A
V
-SW) and peripheral
circuits.
Check IC3801 (A
V
-SW) thru IC401/IC600.
Check IC600 (LPF) thru IC601 (VPC).
Check IC402 (3D-YC), IC502 (2D-YC) and
IC601 (VPC) thru IC3201 (L
VDS_TX), or
replace the main PWB.
Check IC3201 (L
VDS_TX) and peripheral
circuits.
Check IC3201 thru SC3200.
YES
YES
YES
YES
<On input of the Composite V
ideo signal>
Are the MAIN V
ideo signal and the SUB V
ideo signal output to Pin (56) and Pin (44) of
IC3801 (A
V
-SW) respectively?
<On input of the S-V
ideo signal>
Are the MAIN-Y
and MAIN-C signal output to Pin (56) and Pin (58) of IC3801 (A
V-SW) respectivel
y,
and are the SUB-Y
and SUB-C signal output Pin (44) and Pin (47) respectively?
<On input of the Composite V
ideo signal>
Are the MAIN V
ideo signal and the SUB V
ideo signal input to Pin (8) of IC401 (LPF) and
Pin (2) of IC600 (LPF) respectively?
<On input of the S-V
ideo signal>
Are the MAIN-Y
and MAIN-C signal input to Pin (8) and Pin (1
1) of IC401 (LPF) respectively
, an
d are the SUB-Y
and SUB-C signal input Pin (2) and Pin (6) of IC600 (LPF) respectively?
Is the VIDEO signal input to the input terminals of Pin
(8) of IC402 (3D-YC) and Pin (16) of IC502 (2D-YC)?
<On input of the S-V
ideo signal>
Are the
Y
and C
signal input to Pin (8) and Pin (18) of IC402
respectively
, and are the
Y
and C signal input to Pin
(16) and Pin (12) of IC502 respectively?
(MAIN V
ideo System)
Is the digital video signal output from Pins
(124) thru (133) of IC402 and Pins (1
15) thru
(126) of IC502?
Are the digital video signal and the H/V
-SYNC signal input to Pins (51) thru (78) and Pins (7) thru (10) of IC3201 (L
VDS_TX) re
spectively?
Is the digital video signal output to Pins (39) thru (49) of IC3201 (L
VDS_TX)?
Is the digital video signal(T
A
~
TD ) output to Pins (2) thru (15) of the L
V
Connector (SC3200)?
No problem in the MAIN PWB. Check the
TMDS PWB.
Is the input/output signal of Pins (9) thru (20) of IC3105 ~ Pins (21) thru (31) of IC3101 in the
TMDS PWB normal?
Are the Connector SC3102 of DISPLA
Y_OUTPUT1 and SYSTEM_CABLE normal?
Check the LCD_DISPLA
Y
side.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Check the line between pin (2) of RCA
pin
(J2404) (INPUT4) and pin (22) of IC3801.
Check INPUT4 and Pins (3)(4) of the S-
T
erminal (J2401) thru the input terminal Pins
(24)(26) of IC3801 (A
V
-SW).
Is the V
ideo signal (V4-V) input to the input
terminal Pin (22) of IC3801 (A
V
-SW)?
<S video signal input>
Are there the
Y/C input signals at pins (24)
and (26) (input terminals) of IC3801?
NO
NO
Check IC401 (LPF) thru IC402 (3D-
YC)/IC502 (2D-YC).
NO
Check IC402 (3D-YC), IC502 (2D-YC) and
peripheral circuits.
NO
YES
YES
Is the VIDEO signal input to the input
terminal Pin (72) of IC601 (VPC)?
<On input of the S-V
ideo signal>
Are the
Y
and C signal input to Pin (72) and Pin (71) of
IC601 respectively?
(SUB V
ideo System)
Is the digital video signal output from Pins
(41) thru (50) of IC601?
Check IC601 (VPC) and peripheral circuits.
Check the input/output signal of
IC3105/IC3101 in the
TMDS PWB and
peripheral circuits.
Check the Connector SC3102 of
DISPLA
Y_OUTPUT1 and SYSTEM_CABLE.
+ -
+ -
54
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
(MAIN V
ideo System)
(SUB V
ideo System)
No picture (3)
Set-up Confirmation :
1)
Are the input terminal in the backside of
A
V
C-System and "INPUT
SOURCE" of the remote controller set up correctly? ···See th
e Operation Manual and set up "INPUT
SOURCE" correctly
.
2) Is "Audio Only" in MENU-Option set "Of
f"? ···Set it "Of
f".
Is there video signal (CVBS) output at pin
(17) of
T
uner (V
ideo output terminal)?
V
ideo output missing at tuner (U/V) reception?
<On input of the tuner (U/V)>
Is there video signal input at pin (7) of
IC1
106?
Is there video signal output at pin (5) of
IC1
106?
Is there video signal (CVBS) input at pin (63)
of IC3801 (A
V
-SW)?
YES
YES
YES
YES
YES
YES
YES
Are the MAIN-Y
and SUB-Y
signal output to Pin (56) and Pin (44) of IC3801 respectively?
Is the VIDEO signal input to input terminals
of Pin (8) of IC402 (3D-YC) and Pin (16) of
IC502 (2D-YC)?
On and after this, see the term (1) in "No picture".
On and after this, see the term (1) in "No picture".
Check between IC1
106 and IC3801.
Check the tuner and its peripheral circuits.
Check IC401 (LPF) thru IC402 (3D-
YC)/IC502 (2D-YC).
NO
NO
NO
NO
NO
Is the VIDEO signal input to the input
terminal Pin (72) of IC601 (VPC)?
Check IC3801 (A
V
-SW) and peripheral
circuits.
Check Pins (56)(44) of IC3801 thru
IC401/600.
Check IC600 (LPF) thru IC601 (VPC).
NO
NO
NO
Are the MAIN-Y
and SUB-Y
signal input to Pin (8) of IC401 and Pin (2) of IC600 respectively?
Check between the tuner and IC1
106.
Check IC1
1
06 and its peripheral circuits.
55
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (4)
Set-up Confirmation :
1)
Are the input terminal in the backside of
A
V
C-System and "INPUT
SOURCE" of the remote controller set up correctly? ···See th
e Operation Manual and set up "INPUT
SOURCE" correctly
.
2) Is "Audio Only" in MENU-Option set "Of
f"? ···Set it "Of
f".
Is the VIDEO signal output to DISPLA
Y
-
OUTPUT1 (SC3102)?
No video output to the Monitor
.
<On input of the tuner/external source>
Is the connection of the System cable
(WHITE) normal?
Display Side : Is the VIDEO signal input to the
DVI-Connector to DISPLA
Y
OUTPUT1 (SC2201) ?
See the term of "No picture" in Display-
T
roubleshooting.
YES
YES
NO
NO
YES
YES
Confirm IC3300/IC802 on and before the
circuit of IC3201.
And see "No picture (1)/(2)" in
T
roubleshooting.
In the
TMDS PWB : Is the VIDEO signal
coming to the L
V
-Connector?
NO
YES
YES
In the
TMDS PWB : Check IC3101/IC3105
and peripheral circuits.
In the MAIN PWB : Check IC3201 and
peripheral circuits.
In the MAIN PWB : Is the VIDEO signal input
to IC3201 (TMDS_TX)?
56
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (5)
Is OSD including the menu and the list of
programs displayed in the panel?
No digital broadcasting displayed in the
panel of the liquid crystal
TV
.
<On input of the digital tuner>
NO
Is the digital signal including Data and CLK
output to Pins (2-1
1)(13) of P8903?
NO
Check P8903 thru IC8601, IC8601, IC8801
thru 8802, IC8804 thru 8805 and peripheral
circuits.
Are there no problems with voltage at Pin (2)
of
TU9001 (5V) and Pin (50) and Pin (64) of
IC9008 (1.8V and 3.3V) respectively?
Is voltage at Pin (2)(3) of P9001 not lower
than 10V?
NO
NO
Check the PWB (RDENCA084WJZZ).
Is the DTV
-IN signal input to Pins (190-200)
of IC402 (3D-YC)?
NO
Check IC402 thru SC2101.
NO
Confirm peripheral circuits of
TU9001, and
try to replace
TU9001.
Check IC9001 thru 9002, IC9009 thru 9014,
IC9004 and peripheral circuits.
Is the VIDEO signal output to Pins (124-
133) of IC402?
NO
Check IC402 and peripheral circuits.
YES
YES
YES
YES
YES
YES
Is 4MHz CLK output from Pin (10) of
TU9001?
Check the signal of
TU9001 thru IC9008
and IC8601 thru IC9008, and peripheral
circuits.
YES
Check circuits IC802/IC3300/IC3201 and
peripheral ones.
No picture (6)
Is the CVBS signal output from Pin (24) of
P8903?
No digital broadcasting video output to the
Display/Record terminal.
<On input of the digital tuner>
NO
Is the DTV
-CVBS signal input to Pin (60) of
IC3801 (A
V
-SV)?
Check the MA-Connector (P3802)(P7201)
and the connection of B/B (SC2101)(P8903).
NO
NO
Check IC8905 and peripheral circuits.
NO
Confirm IC3801 and peripheral circuits.
YES
Is the digital signal including Data and CLK
input to Pins (69) thru (79) of IC8905?
NO
Check IC8801 thru 8802, IC8804 thru 8805,
IC8601 and peripheral circuits.
YES
YES
YES
Are the MAIN-Y
and SUB-Y
signal output to
Pin (56) and Pin (44) of IC3801 (A
V
-SV)
respectively?
Is the VIDEO signal output to DISPLA
Y
-
OUTPUT1 (SC3102)?
See the term of "No
picture
to the
Display".
YES
(Addition from an Engineering 4 technical document)
Go back to "No
picture (1)" and
check from last item.
Click on the first or last page to see other LC-45GD1E (serv.man29) service manuals if exist.