LG Flatron L1510B Service Manual

COLOR MONIT OR

SER VICE MANUAL

Website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.html

CAUTION

BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS NO. : CL-32

MODEL: L1510B (L1510BL-AL**R)

( ) **Same model for SVC

CONTENTS

SPECIFICATIONS

- 2 -

1. LCD CHARACTERISTICS

Type : TFT XGA LCD Module
Size : 331.0(H) x 257.9(V) x 11.0(D)
Pixel Pitch : 0.297mm x 0.297mm
Color Depth :

6bits(with FRC)/ 16M colors

Active Video Area : 15.0inch

(304.128 x 228.096)
Surface Treatment : Anti-Glare, Hard Coating (3H)
Backlight Unit : Top/Bottom edge side 2CCFL
Electrical Interface : LVDS interface

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10
Left : 55° min. Right : 55° min.
Top : 40° min. Bottom : 40° min.

2-2. Luminance

:

200(min.), 250(typ.) at Center point

2-3. Contrast Ratio :250(min.), 350(typ.)

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

1) Type : Separate Sync. (Horizontal & Vertical)

2) Input Voltage Level: Low=0~0.8V, High=2.1~5.5V

3) Sync Polarity : Positive or Negative

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.714 V

a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.467 Vp-p
c) Color 15, 0 : 0.714 Vp-p

3) Input Impedance : 75 Ω

3-3. Operating Frequency

Horizontal : 30 ~ 63kHz
Vertical : 56 ~ 75Hz

4. POWER SUPPLY

4-1. Power

100~240V, 50/60Hz 0.6A

4-2. Power Consumption

5. ENVIRONMENT

5-1. Operating Temperature: 10°C~35°C (50°F~95°F)

(Ambient)

5-2. Relative Humidity : 10%~80%

(Non-condensing)

5-3. MTBF : 50,000 Hours (Min.)

Lamp Life : 40,000 Hours (Min.)

6. DIMENSIONS (with TILT/SWIVEL)

Width : 356mm (14.01'')
Depth : 229mm (9.01'')
Height : 380mm (14.96'')

Width : 356mm (14.01'')
Depth : 291.4mm (11.47'')
Height : 103.3mm (4.06'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 5.1kg (11.24 lbs)
Gross Weight : 6.6kg (14.55 lbs)

SPECIFICATIONS ................................................... 2

PRECAUTIONS ....................................................... 3

TIMING CHART ....................................................... 4

OPERATING INSTRUCTIONS ................................ 5

WIRING DIAGRAM ................................................. 8

BLOCK DIAGRAM ................................................... 9

DESCRIPTION OF BLOCK DIAGRAM ................. 10

ADJUSTMENT ....................................................... 11

TROUBLESHOOTING GUIDE .............................. 12

PRINTED CIRCUIT BOARD................................... 16

EXPLODED VIEW...................................................18

REPLACEMENT PARTS LIST ...............................21

PIN CONFIGURATION............................................24

SCHEMATIC DIAGRAM......................................... 26

MODE

POWER ON (MAX)

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPM OFF

H/V SYNC

ON/ON

ON/ON
OFF/ON
ON/OFF

-

POWER CONSUMPTION

less than 30 W
less than 25 W

less than 3 W
less than 3 W

less than 3 W

LED COLOR

GREEN
GREEN
AMBER
AMBER
AMBER

VIDEO
ACTIVE
ACTIVE

OFF
OFF

-

- 3 -

WARNING FOR THE SAFETY-RELATED COMPONENT.

• There are some special components used in LCD
monitor that are important for safety. These parts are

marked on the schematic diagram and the
replacement parts list. It is essential that these critical

parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.

• Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.

TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.

• Must mount the module using mounting holes arranged
in four corners.

• Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.

• Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.

• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).

• Make certain that treatment person’s body are
grounded through wrist band.

• Do not leave the module in high temperature and in
areas of high humidity for a long time.

• The module not be exposed to the direct sunlight.

• Avoid contact with water as it may a short circuit within
the module.

• If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)

WARNING

BE CAREFUL ELECTRIC SHOCK !

• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.

• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.

PRECAUTION

CAUTION

Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.

TIMING CHART

- 4 -

VIDEO

SYNC

B

D

C

F

E

A

H / V

H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)

Sync

Polarity

+

–
–

+

–
–
–
–
–
–
–
–

+
+
+
+
+
+
+
+

–
–
–
–
–
–

+
+

Dot

Clock

25.175

28.322

25.175

30.24

31.5

31.5

36.0

40.0

50.0

49.5

57.2832

65

75

78.75

Frequency

31.468 KHz

70.0 Hz

31.468 KHz

70.0 Hz

31.469 KHz

60.0 Hz

35.00 KHz

66.67 Hz

37.861 KHz

72.8 Hz

37.50 KHz

75.0 Hz

35.156KHz

56.25 Hz

37.879 KHz

60.3 Hz

48.077 KHz

72.188 Hz

46.875 KHz

75.0 Hz

49.725 KHz

74.55 Hz

48.363 KHz

60.0 Hz

56.476 KHz

70.0 Hz

60.023 KHz

75.0 Hz

Resolution

640 x 350

720 x 400

640 x 480

640 x 480

640 x 480

640 x 480

800 x 600

800 x 600

800 x 600

800 x 600

832 x 624

1024 x 768

1024 x 768

1024 x 768

Total

Period

( E )

800
449
900
449
800
525
864
525
832
520
840
500

1024

625

1056

628

1040

666

1056

625

1152

667

1344

806

1328

806

1312

800

Video

Active

Time ( A )

640
350
720
400
640
480
640
480
640
480
640
480
800
600
800
600
800
600
800
600
832
624

1024

768

1024

768

1024

768

Blanking

Time

( B )

160

99

180

49

160

45

224

45

192

40

200

20

224

25

256

28

240

66

256

25

320

43

320

38

304

38

288

32

Sync

Duration

( D )

96

2

108

2

96

2

64

3

40

3

64

3

72

2

128

4

120

6

80

3

64

3

136

6

136

6

96

3

Back

Porch

( F )

48
60
55
34
48
33
96
39

128

28

120

16

128

22
88
23
64
23

160

21

224

39

160

29

144

29

176

28

Front

Porch

( C )

16
37
17
13
16
10
64

3

24

9

16

1

24

1

40

1
56
37
16

1
32

1
24

3
24

3
16

1

MODE

1

2

3

4

5

6

7

8

9

10

11

12

13

14

(MAC)

(TEXT)

See front control panel

- 5 -

OPERATING INSTRUCTIONS

FRONT VIEW

REAR VIEW

Power Connector

D-Sub Signal Connector

Front Control Panel

1. Power Button

Use this button to turn the display on or off.

<Power (DPMS) Indicator>

This Indicator lights up green when the display
operates normally. If the display is in DPM (Energy
Saving) mode, this indicator color changes to
amber.

2. Button

Use these buttons to choose or adjust items in the
On Screen Display.

3. Menu Button

Use this button to enter or exit the On Screen
Display.

4.

AUTO/SELECT Button

Use this button to enter a selection in the On
Screen Display.

When adjusting your display settings, always
press the AUTO/SELECT button before entering
the On Screen Display(OSD). This will
automatically adjust your display image to the
ideal settings for the current screen resolution
size (display mode).

The best display mode is 1024x768/60Hz.

1143 2

This function optimizes the brightness, contrast or
color value to the surrounding conditions and settings
and enables you to enjoy the most suitable picture by
adjusting the surroundings (DAY/NIGHT/USER
MODE).

•

TEXT: For viewing letters

•

MOVIE: For viewing movies

•

PHOTO: For viewing pictures or the photographs

•

USER MODE: This function memorizes the
manual adjustment -Brightness, Contrast and
Color value on the On Screen Display.

100

100

Bring up Contrast and Brightness adjustment.
:

- 6 -

6. Control Lock(Menu button, button)

Press the hold the MENU button and button for
3 seconds: the message “CONTROLS LOCKED”
appears.

You can unlock the OSD controls at any time by
pushing the MENU, button for 3 seconds:
the message “CONTROLS UNLOCKED” will
appear.

Ergonomic

It is recommended that in order to maintain an ergonomic and comfortable viewing position, the forward tilt angle of the monitor should
not exceed 5 degrees.

Height Range : maximun 3.39inch (86.1mm)

Landscape & Portrait : You can rotate the panel 90

o

clockwise.

(* For detailed information, please refer to the Pivot Sofeware CD provided.)

※ Adjust the position of the panel in various ways for maximum comfort.

Tilt Range : -24˚~145˚

145˚ -24˚

* Make sure not to

touch the floor
when the head
rotates to use the
Pivot function.

Positioning your display

- 7 -

Making use of USB (Universal Serial Bus)*

USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer.
By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to
connect them to your computer. This will give you greater flexibility in setting up your system. USB allows you to connect
chain up to 120 devices on a single USB port, and you can “hot” plug (attach them while the computer is running) or unplug
them while maintaining Play and Plug auto detection and configuration. This monitor has an integrated BUS-powered USB
hub, allowing up to 2 other USB devices to be attached it.

USB connection

1. Connect the upstream port of the Display to the downstream port of the USB compliant PC or another hub using the
USB cable. (Computer must have a USB port)

2. Connect the USB compliant peripherals to the downstream ports of the monitor.

NOTE

To activate the USB hub function, the monitor must be connected to a USB compliant PC(OS) or another hub with the USB
cable(enclosed).

When connecting the USB cable, check that the shape of the connector at the cable side matches the shape at the connecting
side.

Even if the monitor is in a power saving mode, USB compliant devices will function when they are connected the USB ports(both
the upstream and downstream) of the monitor.

IMPORTANT: These USB connectors are not designed for use with high-power USB devices such as a video camera, scanner, etc.
LGE recommends connecting high-power USB devices directly to the computer.

USB downstream Port

connect the cables from USB
compliant peripherals-such as
keyboard, mouse, etc

This is a simplified representation

of rear view.

To USB downstream port
of the USB compliant PC or
another hub cable

- 8 -

WIRING DIAGRAM

J1

CN2

CN3

J706

J704

J705

Connector Ass’y :
P/N: 6631T11016C

Connector Ass’y :
P/N: 6631T20022G

- 9 -

BLOCK DIAGRAM

D-SUB

MST9011

including

(ADC/LVDS/SCALER )

MTV312

Micom

LCD Module

R,G,B

differential

LVDS

(Low Voltage

Differential

Signaling)

LIPS

5V

5V

AC Input

3.3V

Reg.

2.5V

Reg.

5V

5V

12V

R,G,B, H/V Sync

3.3V

2.5V

3.3V

2.5V

DESCRIPTION OF BLOCK DIAGRAM

- 10 -

1. Video Controller Part & Display Data Transmitter Part.(MST9011)

This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to

the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 80MHz.
This part consists of the Scaler.
The Scaler gets the video signal converted analog to digital, interpolates input to 1024 x 768 resolution signal and

outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip “MST9011” by MSTAR.
This part transmit digital signal from the Scaler to the receiver of module.

2. Micom Part

This Part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V Sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.

3. Power Part

This part consists of the one 3.3V and one 2.5 regulators to convert power which is provided 5V in LIPS Board.
5V is provided for LCD Panel.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.