LS 26LG3000 Schematic

LCD TV

SERVICE MANUAL

CHASSIS:

MODEL: 26LG3000

CAUTION

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

- 1 -

CONTENTS

CONTENTS ......................................................................................................................................2

PRODUCT SAFETY .......................................................................................................................3

SPECIFICATION ...............................................................................................................................6

ADJUSTMENT INSTRUCTION.......................................................................................................12

TROUBLE SHOOTING ................................................................................................................14

BLOCK DIAGRAM.........................................................................................................................18

EXPLODED VIEW ...............……………………………................................................................... 20

REPLACEMENT PARTS LIST ............................…...............……………………………................ 23

SVC. SHEET .................................................................................................................................

SAFETY PRECAUTIONS

SERVICING PRECAUTIONS

.

SPECIFICATION

NOTE: Specifications and others are subject to change without notice for improvement.

1. Application range

1.1 This spec sheet is applied all of the 26" LCD TV

1.2 Not included spec and each product spec in this spec sheet apply correspondingly to the following each country standard and requirement of Buyer

2. Specification

Each part is tested as below without special appointment.

2.1 Temperature: 25± 5 °C

2.2 Relative Humidity: 10 to 90%

2.3 Power Voltage: input voltage (90 ~ 264 V，50/60 Hz ± 3 Hz)

* Standard Voltage of each product is marked by models

2.4 Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM.

2.5 The receiver must be operated for about 30 minutes prior to the adjustment.

3. General Specification (TV)

No Item Specification

1 Receiving system PAL BG/DK/I: SECAM LL’/DK: DVB-T

2 Input voltage AC 90 ~ 264 V/ 50,60 Hz

3 Market Europe

4 Screen size 26 inch wide

5 Aspect Ratio 16:9

6 LCD Module V260B1-L11 NH CMO

7 Operating Environment Temp: 5 ~ 35 deg Humidity: 10 to 90%

8 Storage Environment Temp:-20 ~ 50 deg Humidity: 10 to 90%

9 Input Signal

10 Power consumption

6. Vertical refresh rate 56 - 75 Hz

7. Horizontal frequency 31 - 75 KHz

D-sub / Composite / S-Video / Component / SCART / HDMI / CI Slot / SPDIF Normal on < 120W ( Depend on screen size ) Standby < 1W at 240Vac mains, RC standby mode. Switch off < 1W at 240Vac mains, RC in-active

4. Optical Feature

26″LCD Module-CMO

5. External Input Format

5-1. RGB Input

2 LED colors Blue/Red for Power on / sleeping / switch off Preset timings are as below

Pixel

No Resolution H-freq(kHz) V-freq.(Hz)

1. 720*400 31.468 70.08 28.321

2. 640*480

3 800*600

4. 832*624 49.725 74.55 57.283 Macintosh

5 1024*768

31.469

37.684

37.879

46.875

48.363

56.470

60.123

59.94

75.00

60.31

75.00

60.00

70.00

75.029

clock(

MHz)

25.17

31.50

40.00

49.50

65.00

75.00

78.75

Proposed Remarks

VESA

VESA(XGA)

Input 848*480 60Hz, 852*480 60Hz Î 640*480 60Hz Display

Pixel

No Resolution H-freq(kHz) V-freq.(Hz)

clock(

Proposed Remarks

MHz)

6 1152*864 67.5 75 108 WXGA

7 1280*720 44.78 60 74.5 WXGA 8 1280X768 47.78 59.87 79.5 VESA(WXGA)

9 1360x768 47.72 59.8 84.625 VESA(WXGA)

10 1440*900 55.5 59.90 88.750

WXGA

* RGB-PC EDID DATA

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00 00 FF FF FF FF FF FF 00 1E 6D 00 26 40 E2 01 00 10 04 12 01 03 1C 3A 21 78 2A 1F 9C A3 54 42 97 26 20 0F 47 49 A5 6E 00 81 C0 01 01 01 01 01 01 01 01 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 B8 88 21 00 00 1E 1A 1D 00 80 51 D0 1C 20 50 40 80 35 00 B0 0E 11 00 00 1C 00 00 00 FC 00 32 60 36 4C 47 33 30 30 30 0A 20 20 20 20 00 00 00 FD 70 00 38 4E 1F 50 11 00 0A 20 20 20 20 20 20 00 C0

5-2. HDMI mode

HDMI video input should support timings defined in CEA 861-B Timing requirements

Resolutio

No

n

H-freq(kHz) V-freq.(kHz)

1 640*480 60 SDTV 480P 4:3 2 720*480 15.734 / 15.6 59.94 / 60 27.00 SDTV 480P 4:3 3 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 SDTV 480P 16:9 4 720*576 15.625 50 27(54) SDTV 576I 4:3 5 720*576 31.25 50 54 SDTV 576P 16:9 6 1280*720 37.500 50 74.25 HDTV 720P 7 1280*720 44.96 / 45 59.94 / 60 74.17/74.25 HDTV 720P 8 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25 HDTV 1080I 9 1920*1080 28.125 50.00 74.25 HDTV 1080I

10 1920*1080 26.97 / 27 23.97 / 24 74.17/74.25 HDTV 1080P 11 1920*1080 25

12 1920*1080 33.716 / 33.75

29.976 /

30.00 13 1920*1080 56.250 50 148.5 HDTV 1080P 14 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P

specification with extended EDID blocks

Pixel

clock(MHz)

Proposed Remarks

74.25 HDTV 1080P

HDMI is major for video input. It also can support RGB mode on above timing.(Just only rear HDMI) The video mode is first priority. RGB timing is design in. The color temperature value will copy from TV mode, no need to check

Resolution H-freq(kH

No

z)

V-freq.(H

z)

Pixel

clock(MHz)

Proposed Remarks

1. 720*400 31.468 70.08 28.321

2. 640*480

3 800*600

31.469

37.684

37.879

46.875

59.94

75.00

60.31

75.00

25.17

31.50

40.00

49.50

VESA

4. 832*624 49.725 74.55 57.283 Macintosh

5 1024*768

48.363

56.470

60.123

60.00

70.00

75.029

65.00

75.00

78.75

VESA(XGA)

6 1152*864 75 WXGA 7 1280*720 60 WXGA

8 1280X800 75 WXGA 9 1440*900 55.5 59.90 88.750

WXGA

* HDMI EDID DATA

HDMI1 on the Side

Block 0

Input 848*480 60Hz, 852*480 60Hz Î 640*480 60Hz Display

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00 00 FF FF FF FF FF FF 00 1E 6D 00 26 01 01 01 01 10 04 12 01 03 80 3A 21 78 2A 1F 9C A3 54 42 97 26 20 0F 47 49 A5 6E 00 81 C0 01 01 01 01 01 01 01 01 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 B8 88 21 00 00 1E 40 1F 56 1A 51 00 2A 30 50 2C 40 13 04 58 C2 10 00 00 1E 00 00 00 FD 00 38 60 4E 1E 50 11 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 32 36 4C 47 33 30 30 30 0A 20 20 20 20 01 2A

Block 1

00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21 10 22 1F 10 23 15 07 50 83 01 00 00 65 03 0C 00 20 20 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 34 CD 31 30 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 34 40 CD 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 50 00 34 CD 31 00 00 1E 01 1D 80 D0 72 1C 16 20 10 60 2C 25 80 34 CD 31 00 00 9E 8C 0A D0 90 20 40 31 70 20 0C 40 55 00 34 CD 31 00 00 18 00 00 00 00 F5

HDMI2 on the Rear Cover

Block 0

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00 00 FF FF FF FF FF FF 00 1E 6D 00 26 01 01 01 01 10 04 12 01 03 80 3A 21 78 2A 1F 9C A3 54 42 97 26 20 0F 47 49 A5 6E 00 81 C0 01 01 01 01 01 01 01 01 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 B8 88 21 00 00 1E 40 1F 56 1A 51 00 2A 30 50 2C 40 13 04 58 C2 10 00 00 1E 00 00 00 FD 00 38 60 4E 1E 50 11 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 32 36 4C 47 33 30 30 30 0A 20 20 20 20 01 2A

Block 1

00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21 10 22 1F 10 23 15 07 50 83 01 00 00 65 03 0C 00 10 20 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 34 CD 31 30 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 34 40 CD 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 50 00 34 CD 31 00 00 1E 01 1D 80 D0 72 1C 16 20 10 60 2C 25 80 34 CD 31 00 00 9E 8C 0A D0 90 20 40 31 70 20 0C 40 55 00 34 CD 31 00 00 18 00 00 00 00 05

6. Mechanical specification

NO. Item Content Unit Remark

1

2 Product

Product

Dimension

Width(W) Length(L) Height(H) mm

Before packing TBD TBD TBD mm With Stand

After packing TBD TBD TBD mm Box Out Size

Only Set TBD kg

With Box TBD kg

ADJUSTMENT INSTRUCTION

1. Application Range

This spec. sheet is applied to the models of 19LG3000，22LG3000and 26LG3000

2. Specification.

2.1 Adjustment must be done in the correct sequence.

2.2 The adjustment must be performed at 25±5°C temperature and 10 to 90% relative humidity if there is no specified

designation.

2.3 The input voltage of the receiver must be kept between 90 to 264 V，50/60 Hz ± 3 Hz.

2.4 Before adjustment execute Heat-Run for 30 minutes at RF no signal.

3. ADC Calibration

3.1. ADC Calibration

ADC Component RGB-PC

19LG3000

Timing:314

Pattern:185

22LG3000

720P/50HZ

3.1.1 Prepare

1) Power on the Chorma 22291/23291 and power on the PC.

2)Change TV Source to PC mode。

3) Connect PC Com3 to Chroma 22291/23291 RS-232 connector. Make sure USB-to-Serial Com to Com7.

3.1.2 ADC Picture

3.1.3 ADC Adjust

1)Open the program，press the Config button，if serial Comm open fail, then you must check whether Com3 and Com7

Timing:137

Pattern:42

1024*768/50HZ

are exist。

2)If step one is OK，press the PROGRAM button start adjustment。

3) If adjust successful ,

"ADC" will be green, as 。 If adjust fail ,"ADC" will be red, as 。

3.2. W/B Adjustment

z The color temperature at the screen Should be :

CCT

x

y

Warm Normal Cool

6500k 9300k 11000k

0.314 0.283 0.273

0.324 0.297 0.285

Tolerance ∆x, ∆y = +/- 0.020

Factory alignment tolerance ∆x, ∆y = +/- 0.005

3.2.1 Prepare

1) Power on the Chorma 22291/23291 and power on the PC.

2) Change TV Source to PC mode。

3) Connect PC Com3 to Chroma 22291/23291 RS-232 connector. Make sure USB-to-Serial Com to Com7.

3.2.2 W/B Adjust

1)Open the program，press the Config button，if serial Comm open fail, then you must check whether Com3 and Com7

are exist。

2) Press Connect to CA-210 button, then wait a minute, until connect OK.

3)If step one and step two are OK，press the PROGRAM button start adjustment。

TROUBLE SHOOTING

1. No Power (LED Blank )

No Power

Check power

cord and board

interface

OK

Check F901, BD901

OK

Check Q901

OK

Check IC901

OK

Check T931 Replace T931

CheckQ934, IC932, IC933 and relative circuit

OK

NG

Plug in power cord and

interface

NG

Replace F901 or BD901

NG

Replace Q901

NG

Replace IC901

NG

Replace IC903 IC902

2. No Display

No display

Check the source

OK

Check LVDS cable

OK

Check 12V power supply

OK

Check main board power

OK

NG

Check U404

OK

Check I2C communication

OK

Check panel

NG

3. Can’t start (LED indicator Blank)

Can’t start

Check keyboard

OK

Check 5V_SB

OK

Check I2C communication

OK

Check oscillistor

NG

Replace U404

NG

Replace panel

NG

Reset source

Replace LVDS cable

Return to “1”

Repair I2C communication relative circuit

Repair the keyboard

Check every chip power supply

Replace I2C communication component

Replace oscillistor

4. Abnormal Display

Abnormal display

Check the source

NG

Reset source

AV, S-video signal component PC signal

OK

Repair each relative circuit

OK

Check signal filter circuit

Check input signal

OK

Check LVDS cable

OK

Check panel

NG

Replace the filter or inductance

OK

RF signal

Replace LVDS cable

Replace panel

Check TV system setup

OK

Check TU201

OK

Replace TU201

5. No Sound

A

r

Check Amplifier TDA8932BTW U602

No sound

Check the source

OK

Check signal filter circuit

Check Earphone jack

OK

Check speaker

Reset source

NG

Replace the filter or inductance

NG

Replace the Earphone jack

SIF signal Check TV system setup

OK

Check TU201

V, co mponent, S-video, PC signal

NG

Replace U602

NG

Replace speake

NG

Replace TU201

Check relative circuit

1. Main Board

A

Y

Power

Board

D-SUB/PC-VG

SCART

S-Video

HDMI 1

HDMI 2

16

5V

Power

3.3V,2.5V,1.8V,1.2V,1.1V

HDMI MUX

TMDS251PAGR

5V,3.3V

BLOCK DIAGRAM

DDR SDRAM HY5DU121622DTP-D4 3

2.5V

MT5380GKU

MPEG-1 layer I/II decoding Audio ADC Audio DAC 3D surround processing with Virtual surround Automatic volume control Audio I/F 2-D Graphic De-interlace VAD C x 4 HDMI In I/F Digital TV Demodulator Analog TV IF Demodulator TV audio demodulator

3.3V,2.5V,1.2V,1.1V

FLASH MEMORY MX25L3205DMI-12G

3.3V

udio AMP

TDA8932BTW

12V

Common Interface Controller

MT8295

3.3V,1.8V

EARPHONE AMP

SPIDF OUT

2.5V

Flash MX25L3205DMI-12G

PCMCIA

5V,3.3V

Headphone

Channel

demodulator

MT5133

3.3V

PbPr/L/R

Audio R/L of CVBS

TUNER

DVB-T

FQD1116ME5V

Audio R/L of PC

IR

Keypad

2. Power Board

Wiring Diagram

750TVM26OB1113N000

PANEL

POWER BOARD

ADPC82412AA1

POWER CORD 089T704A18N BL(Europe) 089T701A18N IS(U.K)

Inverter Wire 095T801414DH44

(Keypad & IR Wire)WIRE

095T801411D515

LVDS CABLE 089T176W30N501

MAIN BOARD

CBPF82BBA3

IR BOARD

IRPF8QC4

078T 495 3 Y

SPEAKER

SPEAKER WIRE 095T8014 4D566

KEY BOARD

KEPE8AA7

Only for training and service purposes

- 21 -

EXPLODED VIEW

020

030

040

050

060

070

080

100

090

120

110

130

140

150

160

180

170

190

290

270

280

200

210

220

230

240

250

260

010

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

LGE Internal Use Only

- 22 -

LGE Internal Use Only

EXPLODED VIEW PARTS LIST

No. PART NO. NO. TPV PART DESCRIPTION

010 ABJ69241601 A34T0780AESA1X0200 Cabinet Assembly 26LG3001-ZA _ 26” TPV Service Parts

020 ADV69255001 A15T0415101 Frame Assembly 26LG3001-ZA _ 26” METAL BRACKET Support Top

030 COV30055601 A15T0417101 750TVM260B1113N000 LCD MODULE(CMO) 26LG3000 TPV ODM

040 ADV69255101 750TVM260B1113N000 Frame Assembly 26LG3001-ZA _ 26” Metal Top Bracket

050 MEV58137101 Q52T6025 11650 Insulator PRESS PC 0.5T Triangle type of insulation sheet for power board

060 EBU57406201 ADPC82412AA1 26LG3000 BRAND TPV ODM POWER BOARD FOR (ADPC82412AA1)

070 EBU57405901 CBPF82BBA3 Main Total Assembly 26LG3000 BRAND MAIN BOARD (CBPF82BBA3)

080 ABA69255201 A33T0415AES 1L0100 Bracket Assembly AV 26LG3001-ZA - SIDE AV Bracket_TPV

090 MAZ58135901 Q15T0352101 Bracket PRESS SECC 0.5T AV SECC(EGI) TPV Serive Parts_AV Shield

100 MAZ57580301 A15T0315101 Bracket PRESS H-GI 1.0 SBHG Wall Mount Bracket

110 MEV58135701 Q52T6025 15247 Insulator PRESS PC 0.2 SUB PC 300*300 26LG3001-ZA_TPV

120 ACQ69260601 A34T0781AES 1L0100 Cover Assembly,Rear 26LG3001-ZA - 26” Back Assy

130 MEY57580002 A33T0409BCC 2L0100 Knob MOLD ABS MAIN 1 26LG3001-ZA_ODM POWER Button

140 MEV58137301 Q52T6025 15251 Insulator PRESS PC 0.5t SUB PC 80*80 Block type of IR Lens

150 EBU57410601 IRPF8QC4 Main Total Assembly 19/22/26LG3000 BRAND IR BOARD(IRPF8AA8)

160 MCK58135601 A33T0414AESA1L0100 Cover MOLD ABS HF380 ABS, HF-380 CONTROL BUTTON COVER

170 MEY58135801 A33T0418BCJ 1L0100 Knob MOLD ABS HF-380 SUB S.KEY CONTROL KNOB

180 EBU57410501 KEPF8AA7 Main Total Assembly BRAND TPV ODM LOCAL KEY BOARD(KEPF8AA7)

190 ABA69260501 A33T0416AES 1L0100 Bracket Assembly SPEAKER BRACKET_ TPV SERVICE PARTS

A33T0417AES 1L0100

200 MGJ58136201 A15T0418101 Plate,Metal PRESS EGI - FRAME EGI META BAR BOTTOM

210 MGJ58136601 A15T0420101 Plate,Metal PRESS EGI - FRAME EGI METAL AC INLET

220 MGJ58136801 A15T0419101 Plate,Metal PRESS EGI - FRAME EGI 26” BRACKET_BASE SUPPORT

230 MJH58137001 Q37T0094011 Supporter MOLD ABS STAND BODY MIDDLE(HINGE ASSY)

240 MCK58137201 A34T0782AEZ 1L0133 Cover MOLD ABS 26LG3001-ZA ABS STAND BASE COVER

250 MAM58137501 A15T0421101 Base PRESS EGI - BASE 26LG3001-ZA - METAL STAND BASE

260 MCQ57579902 Q12T6100 1 Damper MOLD SANTOPRENE FOOT RUBBER GRAY

270 MAZ58136901 Q15T0375101 Bracket PRESS EGI 0.5T - EGI Metal Bracket Supproter

280 MGJ57579701 A85T0113101 S Plate,Shield PRESS SPTE 0.5 SHIELD SPTE Main shield

290 COV30053502 078T 495 3 Y OEM TPV 078T 495 3 Y SPEAKER 26LG3000-ZA 8ohm 5.5W 120X30mm

REPLACEMENT PARTS LIST

DATE:2008.7.26

*S *AL LOC.NO PART NO. DESCPIPTION/SPECIFICATION

MAIN BORRD

CAPACITOR

C101 065T0402470 31 MLCC 0402 47PF J 50V NPO C102 065T0402473 12 MLCC 0402 47NF K 16V X7R C103 065T0603105 12 CHIP 1UF 16V X7R C104 065T0402473 12 MLCC 0402 47NF K 16V X7R C105 065T0402473 12 MLCC 0402 47NF K 16V X7R C106 065T0603105 12 CHIP 1UF 16V X7R C107 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C108 065T0402470 31 MLCC 0402 47PF J 50V NPO C109 065T0805475 A5 CHIP 4.7UF 10V X5R C110 065T0603105 12 CHIP 1UF 16V X7R C111 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C112 065T0805225 12 CHIP 2.2UF 16V X7R 0805 C113 065T0805225 12 CHIP 2.2UF 16V X7R 0805 C114 065T0402471 32 CHIP 470PF 50V X7R C115 065T0402471 32 CHIP 470PF 50V X7R C116 065T0402330 31 33PF +-50% 50V NPO C117 065T0402330 31 33PF +-50% 50V NPO C118 065T0603105 12 CHIP 1UF 16V X7R C119 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C120 065T0402473 12 MLCC 0402 47NF K 16V X7R C121 065T0603105 12 CHIP 1UF 16V X7R C122 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C123 065T0402470 31 MLCC 0402 47PF J 50V NPO C124 065T0603105 12 CHIP 1UF 16V X7R C125 065T0402473 12 MLCC 0402 47NF K 16V X7R C126 065T0402470 31 MLCC 0402 47PF J 50V NPO C127 065T0603105 12 CHIP 1UF 16V X7R C128 065T040210322K M MLCC 0402 CAP 0.01UF 25V X7R C129 065T040215031J M MLCC 0402 CAP 15PF 50V NPO C130 065T040210322K M MLCC 0402 CAP 0.01UF 25V X7R C131 065T040210322K M MLCC 0402 CAP 0.01UF 25V X7R C132 065T040215031J M MLCC 0402 CAP 15PF 50V NPO C133 065T040210322K M MLCC 0402 CAP 0.01UF 25V X7R C134 065T040215031J M MLCC 0402 CAP 15PF 50V NPO C135 065T040210322K M MLCC 0402 CAP 0.01UF 25V X7R C136 065T0805225 12 CHIP 2.2UF 16V X7R 0805 C137 065T0805225 12 CHIP 2.2UF 16V X7R 0805 C138 065T0402471 32 CHIP 470PF 50V X7R C139 065T0402471 32 CHIP 470PF 50V X7R C140 065T0402330 31 33PF +-50% 50V NPO

LS 26LG3000 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual