Sharp LC-45GD1E (serv.man29) Service Manual ▷ View online
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".
59
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE (LC-45GD1E)
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
YES
YES
NO
YES
NO
250ms
1sec
No sound or picture comes out.
Is the power LED lit up in blue?
Is the power LED blinking in red?
Check the AC power cord.
The power LED flashes once (cycle: slow).
The power LED flashes once (cycle: fast).
Blinking twice?
Blinking five times?
Blinking six times?
Is the Backlight off?
To "The backlight does not go on 1."
Go to "The picture is not displayed normally".
Table of power LED blinking timing at error occurrence
Type of error
System cable error
AVC Power supply error
Blinking once: Slow
AVC Power supply error
Blinking once: Slow
H: ON
L: OFF
L: OFF
H: ON
L: OFF
L: OFF
H: ON
L: OFF
L: OFF
H: ON
L: OFF
L: OFF
H: ON
L: OFF
L: OFF
Lamp error
Blinking once: Fast
Blinking once: Fast
System cable error
Panel power supply error
Blinking twice
Panel power supply error
Blinking twice
In-set temperature error
Blinking five times
Blinking five times
H: ON
L: OFF
L: OFF
AVC FAN error
Blinking four times
Blinking four times
H: ON
L: OFF
L: OFF
AVC temperature error
Blinking three times
Blinking three times
Monitor Fan error
Blinking six times
Blinking six times
H: ON
L: OFF
L: OFF
1-Bit amp. error
Blinking seven times
Blinking seven times
Power LED operation (1 cycle)
To "The backlight does not go on 2."
Go to "Power supply error".
Check the temperature of the set.
Check the fan motor and its peripheral circuits.
NO
YES
Blinking six times?
Check the Fan connection.
Check the system cable.
500ms
500ms
60
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
2V/div
4.0
µ
/div
2V/div
4.0
µ
/div
2V/div
4.0
µ
/div
The picture is not displayed normally.
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
NO
YES
NO
YES
NO
NO
YES
NO
NO
YES
YES
NO
YES
NO
YES
NO
YES
The test pattern is normally displayed,
but the whole screen is white for other
displays.
The test pattern is displayed normally,
but the whole screen is black for other
displays.
Is VSYNC normally input to pin (2) of
IC4401?
Check SC2201, periphery
of SC5301, FFC and
periphery of IC5301.
Check IC4003, IC4001 and
periphery of IC4004.
Is pin (5) of IC2205 3.3V?
Check IC2203, IC2201 and
periphery of SC5301.
Are H, V and DE output from TP5301
to TP5303?
Check the periphery of
IC5301 and that of SC5302.
Check SC2201, periphery of
SC5301, FFC and periphery of
IC2203.
When switching REV DISPLAY of the
process mode's LCD PAGE1, the
position of the defective portion does not
change.
The pattern is displayed every other
line in the horizontal direction. Or,
flicker is displayed.
Normal waveform is
output from R4726,
R4727, R6826 and
R6827. (*1)
Normal waveform is
output to TP5829 and
TP5830. (*1)
Check the FPC
connecting the panel.
Check the harnesses
between TCONTOP
and DC/DC PWB.
Normal waveform is input
to pin (12) of P1701. (*2)
Check the harnesses
between TCONTOP
and DC/DC PWB,
periphery of IC4301
and that of P4801.
TP5831 is 16 MHz.
Check the periphery of
X5801.
TP7851, TP7852, TP7853
and TP7854 are 8.1V,2.9V,
5.7V and 5.3V respectively.
Check the CSPOWER
PWB.
Check IC5802, IC5805,
IC5806 and periphery of
IC5807.
Is the gradation pattern displayed
normally when setting PATTERN1 of
PATTERN PAGE1 in the adjustment
process menu to 02?
The upper part of the
screen is abnormal.
Either the left or right
part is abnormal.
Check between IC4301
and SC4702 as well as
between IC4302 and
SC4701.
Check IC4503, IC4504 and
periphery of IC4505.
The lower part of the
screen is abnormal.
The screen is partially
whitish or dark.
Either the left or right
part is abnormal.
Check IC6601, IC6602 and
periphery of IC6603.
Check between IC6401
and SC6802 as well as
between IC6402 and
SC6801.
Is the gradation pattern displayed
normally when setting PATTERN3 of
PATTERN PAGE1 in the adjustment
process menu to 21?
Check between IC4101 and IC4102,
between IC4201 and IC4202 and
their periphery.
Are all gradations displayed normally
when changing PATTERN A of
PATTERN PAGE1 in the adjustment
process menu from 0 to 255?
Check between IC4001 and IC4101,
between IC4004 and IC4201 and
their periphery.
For the displays other than the test
pattern, the left half of the screen is
abnormal.
Check between IC4004 and
SC4002, between IC5502 and
SC5502 and FPC.
For the displays other than the test
pattern, the right half of the screen is
abnormal.
Check between IC4001 and
SC4001, between IC5501 and
SC5501 and FPC.
The displays other than the test pattern
are abnormal every other line in the
vertical direction.
Check the periphery of IC5402.
For the displays other than the test
pattern, the whole screen is abnormal.
Check between IC5301 and IC5401
and their periphery.
(*1)
(*2)
(*3)
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