Sharp LL-T15G1 Service Manual ▷ View online
LL-T15G1/E15G1
CONNECTION, ADJUSTMENT, OPERATION AND FUNCTIONS
2 – 8
5-2. ADJUSTMENT METHOD
6) Version display (for service)
Power ON
Display the software version.
Press the above two buttons at same time, and while turn the power on.
Press the above two buttons at same time, and while turn the power on.
7) Aging (for service)
Power ON
Press the
d
button, Screen color is changed as following.
Green
3
Light Blue
3
Red
3
Pink
3
Yellow
3
White
3
Blue
When the test is terminate, Power off
MENU
SELECT
MENU
MENU
MENU
ADJUSTMENT
AUTO
SELECT
CLOCK
SELECT
PHASE
SELECT
H-POS
SELECT
V-POS
MENU
GAIN CONTROL
AUTO
SELECT
BLACK LEVEL
SELECT
CONTRAST
MENU
WHITE BALANCE
COOL STD WARM USER
SELECT
B-CONTRAST
SELECT
SELECT
G-CONTRAST
R-CONTRAST
MENU
MODE SELECT
OSD H-POSITION
SELECT
OSD V-POSITION
SELECT
400 LINES
SELECT
SCALING
SELECT
LANGUAGE
1) Adjusting the backlight
Buttons
2) Resetting all adjustment values
Power ON
Power ON
Press the above two buttons at same time, and while turn the power on.
3) ADJUSTMENT menu reser
Press the two buttons at same time.
4) Adjustment lock function
While pressing the MENU button, turn the power on.
5) Automatic screen adjustment
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( buttons)
( SELECT buttons)
MENU
< VERSION & CHECK SUM >
VERSION
: 1.01 (20010831)
CHECK SUM
: OK DBCF
AGING
TEST
>
: SET
MENU
: END
SELECT
LL-T15G1/E15G1
DISASSEMBLY AND ASSEMBLY
3 – 1
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
H
2
A
B
B
C
C
C
A
1
A
A
D
D
3
E
E
K
K
K
G
G
K
d
e
7
g
f
b c
e
g
f
d
E
5
a
4
a
F
F
b
c
C
C
C
J
C
2
6
h
h
h
i
i
10
9
8
1. SEPARATING THE LCD FROM THE STAND
1) Remove the screw
A
and the two screws
H
, then, remove the hinge cover
2
.
2) Remove the four screws
B
to separate the LCD from the stand.
3) Remove the two screws
C
and remove the hinge.
4) Remove the two screws
i
and disassembly the stand.
2. THE LCD SECTION
1) Remove the four screws
A
and the two screws
C
, then, remove
the rear panel
1
.
2) Remove the two lock screws
J
and the six screws
C
, then,
remove the main board shield
2
.
3) Remove the four screws
F
and remove the connector
b
,
c
,
a
and
h
, then, remove the main board
6
.
4) Remove the four screws
D
, then, remove the inverter shield
3
.
5) Remove the four screws
G
and remove the connector
d
,
e
,
f
and
g
, then, remove the inverter board
7
.
6) Remove the three screws
E
, then, remove the front cover
4
,
LED filter
9
, key button
F
and switch board
5
.
7) Remove the four screws
K
and remove the LCD module
8
.
LL-T15G1/E15G1
TROUBLESHOOTING
4 – 1
CHAPTER 4. TROUBLESHOOTING
No power supply
Does LED turns on in green
when power switch is turned
on?
when power switch is turned
on?
No
No
No
No
No
No
LED turns on in red?
Yes
Yes
Yes
Yes
Yes
Yes
* Check LED for breakage.
* Check key cable for disconnection.
* Check key cable for disconnection.
Replace any unit (main PWB, SW PWB, cable)
which shows any defect, with a new one.
which shows any defect, with a new one.
1) PC is turned off?
2) RGB cable is disconnected?
3) Synchronizing signal is output from RGB
2) RGB cable is disconnected?
3) Synchronizing signal is output from RGB
cable?
Check whether the unit is in power save
mode (synchronizing signal is not input.).
mode (synchronizing signal is not input.).
Synchronizing signal is input to main PWB?
Replace RGB cable
with a new one.
with a new one.
LED turns on in orange?
Check power input system.
1) AC adapter
* Normal?
* Connected properly?
2) Blown out fuse (F1)?
3) +5VX, 3.3V, PVD, VDD, VD, 3V3, VLCD,
3V3 signal is output?
4) LED
* Check LED for breakage.
* Check the path between J101 (Pin 3)
* Normal?
* Connected properly?
2) Blown out fuse (F1)?
3) +5VX, 3.3V, PVD, VDD, VD, 3V3, VLCD,
3V3 signal is output?
4) LED
* Check LED for breakage.
* Check the path between J101 (Pin 3)
and IC101 (Pin 16).
Replace any defective unit.
[ 1) Adapter, 2) A Main PWB, 3) Switch
PWB ] with a new one.
[ 1) Adapter, 2) A Main PWB, 3) Switch
PWB ] with a new one.
Backlight turns ON?
Check for RGB cable input
signal.
signal.
Replace RGB cable.
Check each pin terminal
of connector (W05)
of connector (W05)
Normal
Normal
Normal
Defective
Defective
* Check inverter PWB unit.
Note: Use caution when checking output
Note: Use caution when checking output
side because it has a high voltage.
Replace LCD module with a
new one.
new one.
Replace inverter PWB
unit with a new one.
unit with a new one.
A
LL-T15G1/E15G1
TROUBLESHOOTING
4 – 2
A
Screen does not operate normally.
Check RGB cable.
Defective
Replace RGB cable with
a new one.
a new one.
Check screen condition by changing display modes.
Reset the microprocessor to check if screen condition changes.
(Press and hold MENU and SELECT buttons while turning on power switch.)
(Press and hold MENU and SELECT buttons while turning on power switch.)
Screen stays in black.
Screen stays in white.
Screen jitters or on-screen
characters flicker.
characters flicker.
Abnormal color
Check the following signals
1) Check if module control signal is output.
2) Check if VLCD voltage is output normally.
Yes
No
Yes
No
Yes
No
CLOCK and PHASE
can be adjusted?
can be adjusted?
Does abnormal area move on
screen when BLACK LEVEL or
CONT is changed after H-POS
or V-POS is set?
screen when BLACK LEVEL or
CONT is changed after H-POS
or V-POS is set?
Switch PWB defective
Main PWB defective.
LCD panel defective.
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