LG L1520BM, L1520B Service Manual

Service Guide Specification

Model Description

1.



PARK

H. J

04.02.06





KIM J. O

04.02.06

MODEL

SUFFIX

2.

L1520BM

ALEUR

BRAND

Product Name

Printing Specification

LG

FLATRON L1520B

1. Trim Size (Format) : 215mm x 280 mm

2. Printing Colors

• Cover : LG COLOR

• Inside : Black

3. Stock (Paper)

• Cover : Snow white paper 150 g/

• Inside : Snow white paper 100 g/







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4. Printing Method :

5. Bindery : Saddle stitch

6. Language : English

7. Number of pages : 24(Including blank 1page)

Part No.

3828TSL097G

4.

8

7

6 5 4

3 2

1

REV.

NO.

Special Instructions3.

Changes

MM/DD/YY

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CHANGE NO.

CHANGE CONTENTS

Pagination sheet

P/NO.3828TSL097G Total pages : 24pages

Front Cover

Front cover

Inside

(Blank)

English

21

English

2

Rear Cover

Inside

22

English

3

Rear

Cover

English

4

English

…….

English

…..

English

19

English

20

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-61

MODEL: L1520B (L1520BM-AL**R)

( ) **Same model for Service

*Same looking with new chassis.

Issue Date; 2004. 2

- 1 -

CONTENTS

SPECIFICATIONS

- 2 -

1. LCD CHARACTERISTICS

Type : TFT XGA LCD Module Size : 352.0(H) x 263.5(V) x 14.0(T) 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 : 2CCFL Operating Mode : Transmissive mode, Normally white Electrical Interface : LVDS interface

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10 Left : 55° min. 65° typ. Right: 55° min. 65° typ. Top : 40° min. 45° typ. Bottom: 50° min. 55° typ.

2-2. Luminance

:

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

2-3. Contrast Ratio : 300(min.), 400(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 : 0~0.7 V

a) Color 0, 0 : 0 Vp-p b) Color 7, 0 : 0.35 Vp-p c) Color 15, 0 : 0.7 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)

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

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

Lamp Life : 40,000 Hours (Min.)

6. DIMENSIONS (with TILT/SWIVEL) FullUp Position

Width : 363.8mm (14.32'') Depth : 220mm (8.66'') Height : 330.7mm (13.02'')

Folded Position

Width : 363.8mm (14.32'') Depth : 113.7mm (8.66'') Height : 358mm (14.09'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 3.2kg (7.05 lbs) Gross Weight : 5.5kg (12.13 lbs)

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

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

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

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

WIRING DIAGRAM ................................................. 6

BLOCK DIAGRAM ................................................... 7

DESCRIPTION OF BLOCK DIAGRAM ................... 8

ADJUSTMENT ........................................................ 9

TROUBLESHOOTING GUIDE .............................. 11

EXPLODED VIEW...................................................15

REPLACEMENT PARTS LIST ...............................17

SCHEMATIC DIAGRAM......................................... 19

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPM OFF

POWER S/W OFF

H/V SYNC

ON/ON OFF/ON ON/OFF

OFF

-

POWER CONSUMPTION

less than 25 W

less than 1 W less than 1 W less than 1W less than 1W

LED COLOR

BLUE AMBER AMBER AMBER

OFF

VIDEO

ACTIVE

OFF 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

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

800 x 600

832 x 624

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)

OPERATING INSTRUCTIONS

- 5 -

FRONT VIEW REAR VIEW

Front Control Panel

1. Power Button

Use this button to turn the display on or off.

This Indicator lights up blue 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.

See front control panel

D-sub Connect

Power Connect

143 2

This feature lets you easily select the best desired image condition optimized to the environment (ambient illumination, image types etc.).

• DAY: Bright ambient illumination

• NIGHT: Dark ambient illumination

• TEXT: For text images (Word processing etc.)

• MOVIE : For animation images in videos or movies

• PHOTO : For pictures or drawings

• USER MODE : For use under user setup image

conditions (Brightness, contrast and color tint are selected by the user in OSD Screen Setup Menu.)

100

Bring up Contrast and Brightness adjustment. :