LG L1910B(CL62) 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-62

MODEL: L1910B (L1910BM-AF**R)

( ) **Same model for Service

*To apply the Mstar Chip.

L1810B

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1. LCD CHARACTERISTICS

Type : TFT Color LCD Module Size : 19inch(48cm)diagonal Pixel Pitch : 0.294(H) x 0.294(V) Color Depth : 8-bit, 16,777,216 colors Electrical Interface : LVDS Surface Treatment : Anti-Glare, Hard Coating(3H) Operating Mode : Normally Black Backlight Unit : 4-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

(LPL Module)

Left : -85° min., -88°(Typ) Right : +85° min., +88°(Typ) Top :+85° min., +88°(Typ) Bottom : -85°min., -88°(Typ)

(AU Module)

Left : -75° min., -85°(Typ) Right : +75° min., +85°(Typ) Top :+75° min., +85°(Typ) Bottom : -75°min., -85°(Typ)

(CMO Module)

Left : -85°(Typ) Right : +85°(Typ) Top : +85°(Typ) Bottom : -85°(Typ)

2-2. Luminance : 190(min), 250(Typ)

-LPL Module

200(min), 250(Typ) -AUO Module 200(min), 250(Typ) -CMO Module

2-3. Contrast Ratio : 250(min), 400(Typ)

-LPL Module

400(min), 600(Typ) -AUO Module 250(min), 400(Typ)

CMO Module

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

• Type : Separate, Composite, SOG (Sync On Green) Digital

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(Analog) : 30 ~ 83kHz Horizontal(Digital) : 30 ~ 71kHz Vertical : 56 ~ 75Hz

4. MAX. RESOLUTION

D-sub Analog : 1280 x 1024 DVI Digital/Analog : 1280 x 1024

5. POWER SUPPLY

5-1. Power Adaptor(Built-in Power)

Input : AC 100~240V, 50/60Hz , 1.0A

5-2. Power Consumption

6. ENVIRONMENT

6-1. Operating Temperature: 10°C~35°C (50°F~95°F)

(Ambient)

6-2. Relative Humidity : 10%~80%

(Non-condensing)

6-3. MTBF : 50,000 Hours

Lamp Life : 30,000 Hours(Typ)

7. DIMENSIONS (with TILT/SWIVEL)

Width : 413 mm (16.25'') Depth : 223 mm (8.78'') Height : 435mm (17.13'')

8. WEIGHT (with TILT/SWIVEL)

Net. Weight : 7.6kg (16.75 lbs) Gross Weight : 10.1kg (22.27 lbs)

9. USB

Upstream : 1 port, Downstream : 2 port Speed : Full-12Mbps, Low-1.5Mbps

CONTENTS

SPECIFICATIONS

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

PRECAUTIONS ....................................................... 4

TIMING CHART ....................................................... 5

OPERATING INSTRUCTIONS ................................ 6

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

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

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

ADJUSTMENT ...................................................... 12

TROUBLESHOOTING GUIDE .............................. 13

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

REPLACEMENT PARTS LIST ...............................20

SCHEMATIC DIAGRAM......................................... 24

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPM OFF

POWER S/W OFF

H/V SYNC

ON/ON OFF/ON ON/OFF

OFF/OFF

POWER CONSUMPTION

less than 45 W

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

LED COLOR

GREEN AMBER AMBER AMBER

OFF

VIDEO

ACTIVE

OFF OFF OFF

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Signal Connector Pin Assignment

Pin Signal (DVI-D)

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

T. M. D. S. Data2T. M. D. S. Data2+ T. M. D. S. Data2/4 Shield T. M. D. S. Data4T. M. D. S. Data4+ DDC Clock DDC Data Analog Vertical Sync. T. M. D. S. Data1T. M. D. S. Data1+ T. M. D. S. Data1/3 Shield T. M. D. S. Data3T. M. D. S. Data3+ +5V Power Ground

(return for +5V,

H. Sync. and V. Sync.)

Pin Signal (DVI-D)

16 17 18 19 20 21 22 23 24

Hot Plug Detect T. M. D. S. Data0T. M. D. S. Data0+ T. M. D. S. Data0/5 Shield T. M. D. S. Data5T. M. D. S. Data5+ T. M. D. S. Clock Shield T. M. D. S. Clock+ T. M. D. S. Clock-

T. M. D. S. (Transition Minimized Differential Signaling)

• DVI-D Connector

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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

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VIDEO

SYNC

<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>

H + 31.469 800 640 16 96 48 V – 70.8 449 350 37 2 60

H + 37.879 1056 800 40 128 88 V + 60.317 628 600 1 4 23

H – 31.469 800 640 16 96 48 V – 59.94 525 480 10 2 33 H – 37.5 840 640 16 64 120 V – 75 500 480 1 3 16

H – 31.468 900 720 18 108 54 V + 70.09 449 400 12 2 35

H + 46.875 1056 800 16 80 160 V + 75.0 625 600 1 3 21 H+/– 49.725 1152 832 32 64 224 V+/– 74.55 667 624 1 3 39 H – 48.363 1344 1024 24 136 160 V – 60.0 806 768 3 6 29 H – 60.123 1312 1024 16 96 176 V – 75.029 800 768 1 3 28 H+/– 68.681 1456 1152 32 128 144 V+/– 75.062 915 870 3 3 39 H+/– 61.805 1504 1152 18 134 200 V+/– 65.96 937 900 2 4 31 H + 63.981 1688 1280 48 112 248 V + 60.02 1066 1024 1 3 38 H + 79.976 1688 1280 16 144 248 V + 75.035 1066 1024 1 3 38

Mode

H/V

Sort

25.175

28.321

25.175

31.5

40.0

49.5

57.283

65.0

78.75

100.0

92.978

108.0

135.0

640x350

70Hz

800x600

60Hz

640x480

60Hz

640x480

75Hz

720x400

70Hz

800x600

75Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1152x900

75Hz

1152x900

65Hz

1280x1024

60Hz

1280x1024

75Hz

Sync

Polarity

Frequency

Dot

Clock

Total Period

(E)

Video Active Time

(A)

Sync Duration

(D)

Back Porch

(F)

Front Porch

(C)

Resolution

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FRONT VIEW

Front Control Panel

REAR VIEW

OPERATING INSTRUCTIONS

L1810B

Front Control Panel

Power Connect

USB Port

LightView

14 36 5

1. Power ON/OFF Button

Use this button to turn the monitor on or off.

2. Power Indicator

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

Button

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

4. MENU Button

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

5. 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 1280x1024/60Hz.

6. SOURCE Button

Use this button to make Dsub or DVI connector active. This feature is used when two computers are connected to the monitor. The default setting is Dsub.

DVI Connect

D-Sub Signal Connect

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

Bring up Contrast and Brightness adjustment. :

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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 Plug and Play 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.

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

This function allows you to secure the current control settings, so that they cannot be inadvertently changed. Press and 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 and button for 3 seconds: the message “CONTROLS UNLOCKED” will appear.

CONTROLS LOCKED/UNLOCKED :

MENU and

J702

J706

J705

CN002

CN103CN102

CN104CN105

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WIRING DIAGRAM

Connector Ass’y P/N:

6631T20023A

Connector Ass’y P/N:

6631T11012W

Connector Ass’y P/N:

6631T20022E

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