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LL-T15G4-H/LL-T15G4-B

CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 5

BUTTON

ITEM

ADJUSTMENT

DESCRIPTION

MENU

MENU 1: 
ADJUSTMENT
(Analog)

MANUAL

CLOCK

0~255

CLOCK: Adjust so that vertical flicker noise is not emit-

ted. (

e d

 buttons)

MENU 1

4

MENU 2

4

MENU 3

4

MENU 4

4

MENU END

PHASE

0~63

PHASE: Adjust so that horizontal flicker noise is not

emitted. (

e d

 buttons)

H-POS

0~400

H-POS (horizontal positioning) and 
V-POS (vertical positioning)

To center the screen image within the boundaries of
the screen, adjust the left-right (H-POS) values and
the up-down (V-POS) values. (

e d

 buttons)

V-POS

0~100

AUTO

Automatic screen adjustment

Options in the ADJUSTMENT Menu can be adjusted
automatically
(CLOCK, PHASE, H-POS V-POS).

MENU 2: 
GAIN CONTROL
(Analog)

MANUAL

BLACK LEVEL

0~63

BLACK LEVEL: Total screen brightness can be adjusted

while watching the color pattern. 
(

e d

 buttons)

CONTRAST

0~100

CONTRAST:

While watching the color pattern,
adjustments can be made so that all
graduations appear. (

e d

 buttons)

AUTO

GAIN CONTROL Menu
AUTO: Every menu option is automatically adjusted 

using the Auto Gain Control function.

MENU 3:
WHITE BALANCE

COOL • STD • WARM
(5 levels), 
USER R • G • B: 0~100

WHITE BALANCE Menu

COOL  : Color tone bluer than standard

• 

: Color tone slightly bluer than standard

STD 

: Color tone standard setting

• 

: Color tone slightly redder than standard

WARM : Color tone redder than standard

USER

R-CONTRAST:

e

 button for blue-green

d

 button for red

G-CONTRAST:

e

 button for purple

d

 button for green

B-CONTRAST:

e

 button for yellow

d

 button for blue

MENU 4: 
MODE SELECT

OSD H-POSITION 
(OSD horizontal position)

The position of the OSD display can be moved to the
left and right. (

e d

 buttons)

OSD V-POSITION 
(OSD vertical position)

The position of the OSD display can be moved up and
down. (

e d

 buttons)

SCALING
(Level of scaling)

1~5

SCALING (Level of scaling)
Adjusts the image to optimum sharpness when Screen
expansion is taken. (

e d

buttons)

COLORS

260K (approx. 260,000)
16M (approx. 16.19million)

Maximum display colors can be set. (

e d

buttons)

LANGUAGE

8 countrys
DEUTSCH, ENGLISH,
ESPANOL, FRANCAIS,
I T A L I A N O ,   N E T H E R -
LAND, SVENSKA,
JAPAN

LANGUAGE

Messages displayed on the screen and OSD Menu
contents can be changed to the following languages.

Dutch, English, French, German, Spanish, Italian,
Swedish.

c

/MODE

sRGB, OFFICE, STD,
VIVID

Select the item

Setting color mode when the ADJUSTMENT Menu is
not displayed.
STD:

Displays image with the color tone results
from original scheme of liquid crystal panel.

OFFICE: Displays an image at a brightness level of at

least half the maximum brightness by setting
the value of the backlight to "10" (This setting
saves power.)

sRGB:

sRGB is international standard of color repre-
sentation specified by IEC (International Elec-
trotechnical Commission). Color conversion is
made in taking account of liquid crystals char-
acteristics and represents color tone close to
it original image.

VIVID:

Displays an image with dynamic and VIVID
primary colors.

 

e d

Volume: 0~100
Bright: 0~31

Adjusting the backlight and speaker volume

POWER OFF

LL-T15G4-H/LL-T15G4-B

DISASSEMBLY AND ASSEMBLY

3 – 1

1.

Remove the screws 

1

 and separate the stand unit  

2

.

1.

Remove the screws 

1

 and then remove the rear cover.

(The pawls for lock exist in 15 places.)

1.

Remove the screws 

1

 and then remove the shield 

2

.

1. Remove the screws 

1

 and connectors, and then remove the Power 

supply/Inverter board

 2

.

2. Remove the screws 

3

 and connectors, and then remove the LCD 

main board

 4

.

1. Remove the connector of speaker harness 

1

, and then remove the 

LCD unit.

2. Remove the connectors, and then remove the LCD module 

2

.

LL-T15G4-H/LL-T15G4-B

TROUBLESHOOTING

4 – 1

Replace power supply unit.

Check LED for breakage.
Check key cable for disconnection.

No power supply

Does LED turns on in green 
when power switch is turned 
on?

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

1) PC is turned off?
2) RGB/DVI cable is disconnected?
3) Synchronizing signal is output from 

RGB/DVI cable?

Check whether the unit is in power save 
mode (synchronizing signal is not input.).

Synchronizing signal is input to main PWB?

Replace
RGB/DVI cable with a new one.

LED turns on in orange?

LED turns on in red?

No

No output +5V, 12V from
power supply unit.

Check power input system.

1) Power suply PWB
   *  Normal?
   *  Connected properly?
2) Blown out fuse (F1) on main PWB?
3) Check +5VX, 3.3VX, VCC3.3, VCC2.5 

and VLCD are output?

4) LED
      Check LED for breakage.
      Check the path between P2 and V3.
      Check the cable for disconnection.

Replace any defective unit.
[ 1) Power suply PWB, 2) A Main PWB,
  3) Switch PWB] with a new one.

Backlight turns ON?

Check for RGB/DVI cable 
input signal.

Replace
RGB/DVI cable.

Check each pin terminal 
of Connector (P12).

Normal

Normal

Normal

Defective

Defective

Defective

Check output circuit
 to Connector (P12).
1) If +12V is NG, replace 

*  Check inverter PWB unit.
Note: Use caution when checking output 

side because it has a high voltage. 
(1400 Vrms when starting)

Replace LCD module lamp with 
a new one.

Replace inverter PWB 
unit with a new one.

A

No

Replace RGB/DVI cable with a new one.

*
*
*

LL-T15G4-H/LL-T15G4-B

TROUBLESHOOTING

4 – 2

A

Screen does not operate normally.

Check RGB/DVI cable.

Defective

Normal

Replace RGB/DVI cable 
with a new one.

Check screen condition by changing display modes.

Reset all the microprocessor to check if screen condition changes.
(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.

Abnormal color

Yes

No

Yes

No

Yes

No

CLOCK and PHASE 
can be adjusted?

Does abnormal area move on 
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.

Check the following signals
1) Check if module control signal is output (U1).
2) Is the VCC3.3, VCC2.5 of U1 turned on?
3) CLK, RX0, RX1, RX2 and RX3 are normal?
4) Is the power supply of PWR_DWM turned on?
    (32P of U5)