Sharp LC-45GD1E (serv.man29) Service Manual ▷ View online
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.
57
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Are the R/G/B and DTV-H/V signal
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
Is the DVI-H/V signal output from
Pins (4)(6) of IC1904 (INV)?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (H, L)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1904 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) of IC1917 become
(L, H) when digital AV mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line
(I2C).
Are IC1915 data accessed by I2C
when connected to PC?
Are the DVI-SR/SG/SB and the DVI-
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
Check MD harness for
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
YES
DVI Input (Analog PC mode)
Check the settings: Using the INPUT
SOURCE button ( ) on the remote controller
, select
"INPUT5". Select "Option Input Select" on the menu, and set the input signal type (Signal
T
ype) to
"PC digital".
No picture even at DVI video input (analog signal from PC)(2)
NO
NO
NO
NO
NO
NO
Is the RX0.1.2.C signal input from the
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
Are the DVI-H/V and the DVI-R/G/B
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1900 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) of IC1917 become
(L, L) when analog AV mode
is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line
(I2C).
Are IC1915 data accessed by I2C
when connected to PC?
Are the DVI-SR/SG/SB and DVI-H/V
signal input to Pins (126)(136)(141)
of IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
Check MD harness for
disconnection.
YES
Check IC3700 (ADC), IC3701(SYNC-
SEL) and their peripheral circuits.
YES
DVI Input (Digital PC mode)
Check the settings: Using the INPUT
SOURCE button ( ) on the remote controller
, select
"INPUT5". Select "Option Input Select" on the menu, and set the input signal type (Signal
T
ype) to
"PC digital".
No picture even at DVI video input (digital signal from PC) (1)
58
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Are the R/G/B and DTV-H/V signal
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
Is the DVI-H/V signal output from
Pins (4)(6) of IC1904 (INV)?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (L, L)?
Check PC settings.
Check IC1911 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1904 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) of IC1917 become
(H, H) when digital PC mode
is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line
(I2C).
Are IC1911 data accessed by I2C
when connected to PC?
Are the DVI-SR/SG/SB and the DVI-
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
Check MD harness for
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
YES
DVI Input (Analog
A
V
mode)
No picture even at DVI video input (analog signal from
A
V
unit) (4)
Check the settings: Using the INPUT
SOURCE button ( ) on the remote controller
, select
"INPUT5". Select "Option Input Select" on the menu, and set the input signal type (Signal
T
ype) to "PC
digital".
NO
NO
NO
NO
NO
NO
Is the RX0.1.2.C signal input from the
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
Are the DVI-H/V and the DVI-R/G/B
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (L, H)?
Check PC settings.
Check IC1911 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1900 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) of IC1917 become (H,
L) when analog PC mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line
(I2C).
Are IC1911 data accessed by I2C
when connected to PC?
Are the DVI-SR/SG/SB and DVI-H/V
signal input to Pins (126)(136)(141) of
IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
Check MD harness for
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
YES
DVI Input (Digital
A
V
mode)
No picture even at DVI video input(digital signal from
A
V
unit) (3)
Check the settings: Using the INPUT
SOURCE button ( ) on the remote controller
, select
"INPUT5". Select "Option Input Select" on the menu, and set the input signal type (Signal
T
ype) to "PC
digital".
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