LG L3000H Schematic

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-49

MODEL: L3000H(L3000HL-AL**A, AG**A)

( ) **Same model for Service

MAIN

1. LCD CHARACTERISTICS

Type : TFT Color LCD Module Size : 30inch Pixel Pitch : 0.5025 x 0.1675 x RGB Color Depth : 8-bit, 16,777,216 colors Electrical Interface : LVDS Active Display Area :

643.2mm x 385.92mm -LPL Module

: 683.6mm x 433.6mm -CMO Module

Surface Treatment :

Anti-Glare, Hard Coating(3H) -LPL Module

Anti-Glare, Hard Coating(2H) -CMO Module Operating Mode : Normally Black, Transmissive Backlight Unit : 16-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

Left : -80° min., -85°(Typ) Right : +80° min., +85°(Typ) Top : +80° min., +85°(Typ) Bottom : -80° min., -85°(Typ)

2-2. Luminance : 380(min), 450(Typ)

-LPL Module

450(min), 500(Typ)

-CMO Module

2-3. Contrast Ratio : 280(min), 350(Typ)

-LPL Module

500(Typ)

-CMO Module

3. SIGNAL (Refer to the Timing Chart)

3-1. PC & Video Input

1)Signal Input : S-video,RCA, Component

2)Input Form : D-SUB Analog, DVI-D,V1(CVBS) V2(SVHS), DVD(Ycbcr),HDTV(YPbPr), NTSC

3)Resolution(max) : Analog -1280 x 1024

Digital -1280 x 1024

3-2. Audio Signal

1) Input: PC : 700mVrms

AV : 450mVrms

2) Output: PC : 8W

AV : 8W

3-3. Sync Input

Horizontal : 30 ~ 66kHz(Digital: 30~63kHz) Vertical : 56 ~ 85Hz Input Form : Separate, TTL,

Positive/Negative Digital

4. POWER SUPPLY

4-1. Power Adaptor

Input : AC 100~240V, 50/60Hz , 2.0A Output : DC 5V 0.9A, DC12V 1.5A

DC18V 1.0A, DC24V 5.0A

4-2. Power Consumption

5. ENVIRONMENT

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

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

6-3. MTBF : 50,000 Hours(Min.)

6. DIMENSIONS

Width : 734 mm (28.90'') Height : 99 mm (3.89'') Depth : 538 mm (21.18')

7. WEIGHT

excl. Package : 14.2kg (31.31 lbs)

CONTENTS

SPECIFICATIONS

- 2 -

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

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

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

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

BLOCK DIAGRAM ................................................. 10

DESCRIPTION OF BLOCK DIAGRAM...................11

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

TROUBLESHOOTING GUIDE .............................. 14

WIRING DIAGRAM ............................................... 20

EXPLODED VIEW...................................................22

REPLACEMENT PARTS LIST ...............................24

SCHEMATIC DIAGRAM......................................... 34

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

POWER OFF

CUT-OFF SWITCHOFF

H/V SYNC

ON/ON OFF/ON ON/OFF

OFF/OFF

POWER CONSUMPTION

less than 160 W

less than 5 W less than 5 W

less than 5 W less than 1 W

LED COLOR

GREEN AMBER AMBER AMBER

OFF

VIDEO

ACTIVE

OFF OFF OFF

- 3 -

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 (Digital)

- 4 -

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

- 5 -

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 – 43.269 832 640 56 56 80 V – 85.0 509 480 1 3 25

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 + 70.8 449 400 12 2 35

H + 37.879 1056 800 40 128 88 V + 60.317 628 600 1 4 23 H + 46.875 1056 800 16 80 160 V + 75.0 625 600 1 3 21 H + 53.674 1048 800 32 64 152 V + 85.061 631 600 1 3 27 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 + 63.981 1688 1280 48 112 248 V + 60.02 1066 1024 1 3 38

H + 47.7 1680 1280 66 134 200 V + 60 795 768 1 3 23

Mode

H/V

Sort

25.175

28.321

25.175

31.5

36.0

40.0

49.5

56.25

57.283

65.0

78.75

108.0

80.14

640x350

70Hz

640x480

85Hz

640x480

60Hz

640x480

75Hz

720x400

70Hz

800x600

60Hz

800x600

75Hz

800x600

85Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1280x1024

60Hz

1280x768

60Hz

Sync

Polarity

Frequency

Dot

Clock

Total Period

(E)

Video Active Time

(A)

Sync Duration

(D)

Back Porch

(F)

Front Porch

(C)

Resolution

- 6 -

FRONT VIEW

REAR VIEW CONNECTOR PANEL

REAR VIEW

OPERATING INSTRUCTIONS

Front Control Panel(P7)

RS-232C

Theft prevention locking device

RS-232C Terminal

: The RS-232C protocol is used for communication

between the PC and monitor. You can turn the monitor on/off, seslect an input source or adjust the

OSD menu from your PC. The cable for RS-232C terminal connection is not an accessory included in the product. Please purchase the cable.

2. DVI Digital Signal Connector

3. D-SUB Analog Signal Connector

4. Connect the power cord

5. Speaker Terminal: Connect the speaker

PC Audio Input Terminal

-Connect the audio cable

to the LINE OUT jack in the

PC sound card

Headphone/earphone Connection Terminal

S-Video Input Terminal

AV Output Terminal (Audio)

DVD Input Terminal

AV Input Terminal(Audio)

AV Output Terminal (Video)

AV Input Terminal(Video)

HDTV Input Terminal

MAIN

RS-232C

- 7 -

OPERATING INSTRUCTIONS

Front Control Panel

MAIN

1568 3 4

• Press the button to turn on the power. Press the button again to turn it off.

• 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.

Power Button

Power (DPMS)

Indicator

Adjust the volume

• Use this button to directly control brightness and contrast of the PC signal (DSUB/DVI).

• Use this button toshow/hide the OSD(on Screen Display) menu screen.

MENU Button

•

Use the button to select an icon or adjust the setting in the OSD screen .

OSD

Buttons

[For DSUB signal]

•Select the icon to adjust on the OSD screen.

•If you press the [AUTO/SELECT] button,

automatic screen adjustment will be started.

AUTO/SELECT Button

1 2

3 4

Use this button to lock/unlock OSD screen adjustment.

(Activated when pressed together longer than 5 seconds.)

• Use this button to select an input signal.

• DVI DIGITAL: DVI digital signal

• DSUB ANALOG: 15-pin D-sub analog signal

• VIDEO1 (CVBS): Composite video

• VIDEO2 (S-Video): S-video

• DVD(Y, Cb, Cr): DVD

• HDTV(Y, Pb, Pr): HD television

SOURCE

Button

CONTROLS LOCKED/UNLOCKED :

MENU and

• The unit that receives the signal from the remote controller.

Main Power Switch

AUTO/SELECT

SOURCE

[Other signals that DSUB]

•The current signal and mode information will be displayed.

• Use this button to turn on/off the monitor.

•

OSD is locked

•

OSD is unlocked.

- 8 -

Remote Controller Buttons

Power On/Off Button

•

Input Select Button

•

AV Button

(See next page)

Sleep Button

When watching AV/DVD/HDTV

The monitor will be automatically turned off after a certain period of time. Press this button repetitively to select an appropriate time duration

PSM Button

When watching AV/DVD/HDTV

- Automatically adjusts the image. Press this button repetitively to set the intended screen.

CAPTION Button

- (Only U.S.A) There is not a function

which is supported

•

Menu Button

•

Exit Button

Auto Channel Button

PC: Automatic adjustment function

(Operational for the analog signal only)

There is not a function

which is supported

Check Button

Sound Mode Select

Select the sound mode:

MONO/STEREO

Video Operation Button

Applicable for LG products only

Volume Button

Mute button

- 9 -

1. PIP (Picture in Picture) Button

The sub-screen moves to the next mode whenever you press this button. : Small -> Large -> Off

2. POP (Picture out Picture) Button

The sub-screen moves to the next mode whenever you press this button. : POP ON -> PBP(FULL) -> PBP(4:3) -> OFF

If you press the button once, the following Input Signal Window will appear. Select the signal type you want

using the button.

This button will be enabled only when you selected the AV signal. The signal type will be changed with the following order. Set the signal type you want.

POP ON PBP (FULL) PBP (4:3)

•

Input Select Button

•

AV Button

3. Swap Button

You can swap the main screen and the sub-screen when the PIP/POP/PBP function is used..

When 'Input Signal 1' comes on in the main screen, only 'Input Signal 2' can be displayed on the sub-screen. On the contrary, if the main screen displays 'Input Signal 2', the subscreen can display 'Input Signal 1' only. You can swap 'Input

Signal 1' and 'Input Signal 2' using the SWAP button.

VIDEO1 VEDIO2 DVD HDTV

SWAP

PIP

POP

PBP

- 10 -

DDR

BLOCK DIAGRAM

128Mb

Video Signal

SDRAM

3.3V

(HY5DU283222Q4)

(29LV040B)

Memory

4Mb Flash

LCD

Module

Even

R,G,B

1.8V

2.5V

3.3V 5V

12V

24V

DC/DC

Regulator

(CMO)

(LPL)

12V

Power

Built-in

Format Converter

2.5V

Circuit

Data

(FSD 0 ..31)

(FSA 0 ..11)

3.3V

2.5V

1.8V

DDC-A

EEPROM

DDC-D

EEPROM

H/ V Sync

Digital Signal

Data

(OCMD 0 ..7)

(OCMA 0 ..19)

(gm1501)

Processor

Video Signal

24Bit

Analog Signal

INV_PWR

LCM_PWR

AMP_PWR

PCB_PWR

System

EEPROM

(FLI2310)

Deinterlacer

64Mb

SDRAM

(HY57V643220)

Control Signals

16 Bit

YUV

Only USA

PCB_PWR

INV_PWR

Caption/V-Chip

Video

Decoder

LCM_PWR

AMP_PWR

12V

(M37136)

Video Out

(VPC3230)

CVBS PAL

CVBS Out

Amp

Audio

(TPA3004D2)

Video Filter(5.2Mhz)

Audio

Decoder

SP (R)

TPA6110

VAROUTR/L

(MSP3420G)

D VI-D

H/ V Sync

RGB

D-SUB

Switch

Analog

(BA7657F)

YPbPr

HDTV

RXD

TXD

MAX232C

Port

Serial

DVD

Y/Cb/Cr

Y-out

C-out

CVBS 1

CVBS 2(Tuner)

S/W

(CXA2040AQ)

Y/C-in

Filter

Y/C-out

(UPD64083)

3D Comb

CVBS Audio

CVBS Out

Out

DTV Audio

DVD Audio

CVBS Audio

PC Audio

- 11 -

DESCRIPTION OF BLOCK DIAGRAM

1. Input Selection Circuit

1) Analog Input Selection This block is composed of BA7657F(U103) and peripheral devices. There are analog H/V Syncs. BA7657F IC chooses one input and outputs selected input through sync selection pin (Pin 1).

2) Video Input Selection This block is composed of video S/W IC (CXA2040Q, U3) and peripheral devices. There are three inputs in CXA2040Q IC(CVBS video signal through RF tuner, video input CVBS, S-video signal). One selected video signal is transmitted a video decoder IC (VPC3230, U1)

2. DDC controller

This block is composed of GM1501(U402) and peripheral EEPROM IC(U107,U108). GM1501(U402) controls peripheral devices through IIC line. Major functions are (1) to control Flash memory through DDC-SCLA, DDC-SDAA of D-sub and (2) to store EDID data in the EEPROM (U107,U108).

3. Video Decoder

This block is composed of VPC 3230 (U1) and peripheral devices. GM 1501 controls this IC through IIC Line. This IC analyzes input signal of CVBS, Y/C and output analyzed signal (8bit interlace signal) to De-interlace block. Analyzed signal has video control signals like Contrast, Brightness, Sharpness, Color, tint signals Including Adaptive Comb Filter.

4. Audio Decoder

This block is composed of MSP3420G (U503) and peripheral devices. GM 1501 controls this IC through IIC Line. This IC analyzes audio input signal through A/V Jack and PC audio. The analyzed signals transmitted to audio amplifier (TPA3004, U505).

5. Audio Amplifier

This block is composed of TPA3004 (U505) and peripheral devices. The function of the audio amplifier is that to amplify audio L/R signal transmitted from audio decoder. The audio signal is amplified according to pre-defined DC volume control curve. Also, Headphone amplifier(Tpa6110, U501) is controlled through Lineout.

6. De-interlacer

This block is composed of FLI 2310(U301) and peripheral devices. GM1501 (U402) controls this IC through IIC Line. And this IC converts 8 Bit Interlaced Y/UV signal to Deinterlaced signal. It output converted signal to Format Converter IC(GM 1501, U402).

7. Format Converter

This block is composed of GM 1501(U402) and peripheral devices. GM 1501(Scaler,U402) contains MICOM.

1) This IC contain A/D converter, Pre-amp and PLL circuit that converting analog video signal(0.7Vp-p) through D-sub(J103) Pin to digital signal.

2) This IC Decode TMDS signals of 8 line from DVI-D Pin (J202) and transmit to LVDS Transmitter.

GM 1501 is Format Converter IC that receives Digital signal and outputs proper frame signal to LCD Module Timing(1280x768,WXGA).

8. DC/DC Converter block

DC/DC Converter convert the input 12V, 24V to proper

2.5V, 3.3V, 5V, 1.8V for main control system. For shooting heat trouble, we use the DC/DC converting IC.

9. Caption/V-CHIP block -Only U.S.A

This block is composed of M37136(U202) and peripheral devices. M37136 IC is useful for channel selection system for TV with a closed caption decoder. It receives text information signal and displays text information through text receiver decoder. It called multi-text broadcast.

10. Power Supply Block

This Block generates DC Voltages(12V, 24V) to Main Control system from AC Power(100-240 V, 50/60 Hz,

1.0 A). This Circuit contains PFC(Power Factor correction) circuit. The Minimum of Power efficiency is about 75%.

- 12 -

DVI-D Connector

RS-232C

EXT.

220

IBM Compatible PC

Parallel Port

Power inlet (required)

Power LED

ST Switch

Power Select Switch (110V/220V)

Control Line

Not used

RS232C

PARALLEL

V-SYNC

POWER

VGS

MONITOR

V-Sync On/Off Switch (Switch must be ON.)

10 5

4.7K

74LS06

OFF ON

OFF

Figure 1. Cable Connection

ADJUSTMENT

Windows EDID V1.0 User Manual

Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup

Windows 2000, XP => Need to Port Setup.

This program is available to LCD Monitor only.

1. Port Setup a) Copy “UserPort.sys” file to

“c:\WINNT\system32\drivers” folder

b) Run Userport.exe

c) Remove all default number d) Add 300-3FF

e) Click Start button. f) Click Exit button.

2. EDID Read & Write

1) Run WinEDID.exe

2) Edit Week of Manufacture, Year of Manufacture, Serial Number a) Input User Info Data b) Click “Update” button c) Click “ Write” button

- 13 -

1. Input Analog signal through D-sub.

2. Press MENU Key and 3, 0, 2, 0 Num.key

3. Then move SETUP. You can see SVC OSD.

ADJUST WHITE BALANCE

4. Press Down key to move WB 5. Input Full Black signal through D-Sub and the number beside WB changes 1

7. Input Full White signal through D-Sub and PRESS

RIGHT Key.

8. The number beside WB changes 2.

White balance adjustment is over.

ADJUSTMENT

123CONTRAST

123BRIGHTNESS

COLOR

SETUP

L3000HLMODEL NVRAM INITIAL ELAPSED TIME MICOM VERSION VCHIP TEST WB

OFF

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SETUP

L3000HLMODEL OFF 21 H Ver. 49 OFF

NVRAM INITIAL ELAPSED TIME MICOM VERSION VCHIP TEST

SETUP

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