LG 26LG40 Service Manual

LCD TV/DVD Combo

SERVICE MANUAL

CAUTION

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

CHASSIS : LA89D

MODEL : 26LG40

26LG40-UG

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

Internal Use Only

- 2 -

LGE Internal Use Only

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ............................................................. 10

TROUBLE SHOOTING .......................................................................... 16

BLOCK DIAGRAM ................................................................................. 28

EXPLODED VIEW .................................................................................. 34

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

- 3 -

LGE Internal Use Only

SAFETY PRECAUTIONS

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 Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

LGE Internal Use Only

- 4 -

CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the

SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the

following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before; a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical plug or

other electrical connection.

c. Connecting a test substitute in parallel with an electrolytic

capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength) CAUTION: This is a flammable mixture. Unless specified otherwise in this service manual, lubrication of contacts in not required.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last.

8. Use with this receiver only the test fixtures specified in this

service manual.

CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the

unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500

°F to 600°F.

2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.

3. Keep the soldering iron tip clean and well tinned.

4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering technique a. Allow the soldering iron tip to reach normal temperature.

(500

°F to 600°F)

b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suction-

type solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil.

6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature

(500

°F to 600°F)

b. First, hold the soldering iron tip and solder the strand against

the component lead until the solder melts.

c. Quickly move the soldering iron tip to the junction of the

component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil.

d. Closely inspect the solder area and remove any excess or

splashed solder with a small wire-bristle brush.

SERVICING PRECAUTIONS

- 5 -

LGE Internal Use Only

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.

2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.

Replacement

1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and solder it.

3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.

2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.

Power Output, Transistor Device Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.

2. Bend the two remaining leads perpendicular y to the circuit board.

3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

Fuse and Conventional Resistor Removal/Replacement

1. Clip each fuse or resistor lead at top of the circuit board hollow stake.

2. Securely crimp the leads of replacement component around notch at stake top.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.

At IC Connections

To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

At Other Connections

Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

LGE Internal Use Only

- 6 -

4. General Specification(TV)

No. Item Specification Remark

1. Receiving System ATSC/ NTSC-M

2. Available Channel 1) VHF : 02~13

2) UHF : 14~69

3) DTV : 02-69

4) CATV : 01~135

5) CADTV : 01~135

3. Input Voltage 1) 100-240V~, 50/60Hz Mark : 110V, 60Hz

4. Market NORTH AMERICA

5. Screen Size 26 inch Wide (1366 x 768) HD

32 inch Wide (1366 x 768) HD

6. Aspect Ratio 16:9

7. Tuning System FS

8. LCD Module T260XW02-VM

LC320WXN-SAA2

9. Operating Environment 1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

10. Storage Environment 1) Temp : -20 ~ 60 deg

2) Humidity : 0 ~ 85 %

11. DVD Player DVD Video (Single/Double layer) DSS863(DVS KOREA)

DVD-R/RW, DVD+R/RW * This Specification notices

Video CD, CVD, SVCD kinds of Disc., (These Spec

CD-R/W, CD-Audio, MP3 Audio is up to DVD load’s one)

CD Digital Audio(CD TEXT), JPEG

1. Application Range

This specification sheet is applied to the 26"/32" LCD TV with LA89D chassis.

2. Specification

Each part is tested as below without special appointment

1) Temperature : 20 ±5°C (77±9ºF), CST : 40±5ºC

2) Relative Humidity : 65 ±10%

3) Power Voltage : Standard input voltage (100-240V@ 50/60Hz) * Standard Voltage of each products is marked by models.

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

5) The receiver must be operated for about 20 minutes prior to the adjustment.

3. Test method

1) Performance : LGE TV test method followed.

2) Demanded other specification

- Safety : UL1492, CSA C22.2 No.1

- EMC : FCC Class B, IC Class B

SPECIFICATION

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

LGE Internal Use Only

- 7 -

5. Chroma & Brightness

No. Item Min. Typ. Max. Unit Remark

1 White peak brightness 400 500 cd/m

(Center 1-point / Full White Pattern)

2 White average brightness cd/m

N/A

3 Brightness uniformity 80 % Full white

4 Color coordinate RED X - 0.03 0.636 + 0.03 Measurement condition

(32LG40-UG) Y - 0.03 0.335 + 0.03 - Standard mode

GREEN X - 0.03 0.291 + 0.03 - only RGB-PC mode should be allowed

Y - 0.03 0.613 + 0.03 - 1024*768, 60Hz/ White,R,G,B pattern

BLUE X - 0.03 0.146 + 0.03 - MSPOG-925

Y - 0.03 0.061 + 0.03 - This spec is from module CAS

WHITE X - 0.03 0.279 + 0.03

Y - 0.03 0.292 + 0.03

Color coordinate RED X - 0.03 0.643 + 0.03 Measurement condition

(26LG40-UG) Y - 0.03 0.337 + 0.03 - Standard mode

GREEN X - 0.03 0.294 + 0.03 - only RGB-PC mode should be allowed

Y - 0.03 0.597 + 0.03 - 1024*768, 60Hz/ White,R,G,B pattern

BLUE X - 0.03 0.144 + 0.03 - MSPOG-925

Y - 0.03 0.065 + 0.03 - This spec is from module CAS

WHITE X - 0.03 0.280 + 0.03

Y - 0.03 0.290 + 0.03

5 Color coordinate uniformity N/A

6 Contrast ratio CR 800:1 1,100:1 32LG40-UG (LPL)

700:1 800:1 26LG40-UG (AUO)

DCR 40,000:1 50,000:1 32LG40-UG (LPL)

8,000:1 12,000:1 26LG40-UG (AUO)

7 Color Temperature Cool 10,000 11,000 12,000 <Test Condition>

Standard 8,300 9,300 10,300 HDMI input, 85% Full white pattern

Warm 5,500 6,500 7,500

Adjustment Color Cool X 0.273 0.276 0.279 <Test Condition>

Coordinate Y 0.280 0.283 0.286 Use Inner pattern(Power only button)

Medium X 0.282 0.285 0.288

Y 0.290 0.293 0.296

Warm X 0.310 0.313 0.316

Y 0.326 0.329 0.332

8 Color Distortion, DG 10.0 %

9 Color Distortion, DP 10.0 deg

10 Color S/N, AM/FM 43.0 dB

11 Color Killer Sensitivity -80 dBm

LGE Internal Use Only

- 8 -

7. RGB input (PC)

6. Component Input (Y, C

/PB, CR/PR)

No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed

1 720*480 15.73 60 13.5135 SDTV ,DVD 480I

2 720*480 15.73 59.94 13.5 SDTV ,DVD 480I

3 720*480 31.47 60 27.027 SDTV 480P

4 720*480 31.47 59.94 27.0 SDTV 480P

5 1280*720 45.00 60.00 74.25 HDTV 720P

6 1280*720 44.96 59.94 74.176 HDTV 720P

7 1920*1080 33.75 60.00 74.25 HDTV 1080I

8 1920*1080 33.72 59.94 74.176 HDTV 1080I

9 1920*1080 67.500 60 148.50 HDTV 1080P

10 1920*1080 67.432 59.939 148.352 HDTV 1080P

11 1920*1080 27.000 24.000 74.25 HDTV 1080P

12 1920*1080 26.97 23.976 74.176 HDTV 1080P

13 1920*1080 33.75 30.000 74.25 HDTV 1080P

14 1920*1080 33.71 29.97 74.176 HDTV 1080P

No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed

PC DDC

1 640*350 31.469 70.08 25.17 DOS

2 720*400 31.469 70.08 28.32 DOS O

3 640*480 31.469 59.94 25.17 VESA(VGA) O

4 800*600 37.879 60.31 40.00 VESA(SVGA) O

5 1024*768 48.363 60.00 65.00 VESA(XGA) O

7 1280*768 47.776 59.87 79.50 CVT(WXGA) O

8 1360*768 47.720 59.799 84.75 CVT(WXGA) O

9 1366*768 47.13 59.65 72

- 9 -

LGE Internal Use Only

8. HDMI input (PC/DTV)

No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Remark

PC DDC

1 640*480 31.469 59.94 25.17 VESA(VGA) O

2 800*600 37.879 60.31 40.00 VESA(SVGA) O

3 1024*768 48.363 60.00 65.00 VESA(XGA) O

4 1280*768 47.776 59.87 79.50 CVT(WXGA) O

5 1360*768 47.720 59.799 84.75 CVT(WXGA) O

6 1366*768 47.13 59.65 72

DTV

1 720*480 31.47 60 27.027 SDTV 480P

2 720*480 31.47 59.94 27.00 SDTV 480P

3 1280*720 45.00 60.00 74.25 HDTV 720P

4 1280*720 44.96 59.94 74.176 HDTV 720P

5 1920*1080 33.75 60.00 74.25 HDTV 1080I

6 1920*1080 33.72 59.94 74.176 HDTV 1080I

7 1920*1080 67.500 60 148.50 HDTV 1080P

8 1920*1080 67.432 59.939 148.352 HDTV 1080P

9 1920*1080 27.000 24.000 74.25 HDTV 1080P

10 1920*1080 26.97 23.976 74.176 HDTV 1080P

11 1920*1080 33.75 30.000 74.25 HDTV 1080P

12 1920*1080 33.71 29.97 74.176 HDTV 1080P

LGE Internal Use Only

- 10 -

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the LCD TV, LA89D.

2. Notes

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation

transformer will help protect test equipment. (2) Adjustments must be done in the correct order. (3) The adjustments must be performed in the circumstance of

20±5°C of temperature and 65±10% of relative humidity if

there is no specific designation. (4) The input voltage of the receiver be must kept 220V, 60Hz

when adjusting. (5) The receiver must be operational for about 15 minutes

prior to the adjustments. (6) Perform preliminary operation after receiving 100% White

Pattern. (7) White Pattern entry method

1) Enter into Ez-Adjust by pressing the ADJ key on the adjustment R/C.

2) 100% FULL WHITE PATTERN appears if selecting the white with direction key after selecting the 10. Test Pattern with the CH +/- key.

* It is possible to heat run the set without a separate signal

generator in this mode.

Caution : Care must be taken as afterimage phenomena may occur about the black level part of screen If leaving pause image turned on for more than 20 minutes (especially inner digital pattern (13 CH), Cross Hatch Pattern (09CH) with significant black/white contrast).

3. ADC Adjustment

3-1. PC input ADC

(1) Auto RGB Gain/Offset Adjustment

1) Convert to PC in Input-source

I2C COMMAND:0xF4(SELECT INPUT) 0x00 0x60(RGB) cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),

0x60(RGB), 0x90(HDMI)

2) Signal equipment displays

Output Voltage : 700 mVp-p Impress Resolution XGA (1024x 768 @ 60Hz)

Model : 60 in Pattern Generator Pattern : 29 in Pattern Generator (MSPG-925 Series) [gray pattern that left & right is black and center is white signal (Refer below picture)].

3) Adjust by commanding AUTO_COLOR_ADJUST (0xF1) 0x00 0x02 instruction.

(2) Confirmation

1) We confirm whether “0xB6” address of EEPROM “0xA2” is “0xAA” or not.

2) If “0xB6(RGB)” address of EEPROM “0xB2” isn’t “0xAA”, we adjust once more.

3) We can confirm the ADC values from “0xB0~0xB5 (RGB)” addresses in a page “0xA2”

* Manual ADC process using Service Remote control. After

enter Service Mode by pushing “ADJ” key, execute “Autoadjust” by pushing “

G” key at “0. ADC CALIBRATION”.

3-2. COMPONENT input ADC

(1) Component Gain/Offset Adjustment

1) Convert to Component in Input-source

I2C command : 0xF4(Select input) 0x00 0x40(Component) cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),

0x60(RGB), 0x90(HDMI)

2) Signal equipment displays

Impress Resolution 480i

MODEL : 209 in Pattern Generator(480i Mode) PATTERN : 08 in Pattern Generator(MSPG-925 Series)

3) Adjust by commanding AUTO_COLOR_ADJUST (0xF1) 0x00 0x02 instruction.

4) Signal equipment display

-Impress Resolution : 1080i

- MODEL: 223 in Pattern Generator(1080i Mode)

- PATTERN: 08 in Pattern generator(MAPG-925 series)

5) Adjust by commanding AUTO_COLOR ADJUST(0xF1) 0x00 0x02 instruction.

* Manual ADC process using Service Remote control. After

enter Service Mode by pushing “ADJ” key, execute “Autoadjust” by pushing “

G” key at “0. ADC CALIBRATION”.

EZ ADJUST

1. ADC ADJUST

2. SUB B/C ADJUST

3. W/B ADJUST

4. WHITE PATTERN : OFF

5. 2HOUR OFF : ON

6. OAD

7. UART DOWNLOAD

8. FACTORY MODE : ON

9. DEBUG MODE : OFF

0. ADC CALIBRATION : RGB

EZ ADJUST

1. ADC ADJUST

2. SUB B/C ADJUST

3. W/B ADJUST

4. WHITE PATTERN : OFF

5. 2HOUR OFF : ON

6. OAD

7. UART DOWNLOAD

8. FACTORY MODE : ON

9. DEBUG MODE : OFF

0. ADC CALIBRATION : COMPONENT

(2) Confirmation

1) We confirm whether “0xBF(480i)/0xC8(1080i)” address of EEPROM “0xA2” is “0xAA” or not.

2) If “0xBF(480i)/0xC8(1080i)” address of EEPROM “0xA2” isn’t “0xAA”, we adjust once more.

3) We can confirm the ADC values from “0xB ~0xBE(480i)/ 0xC2~(1080i)” addresses in a page “0xA2”.

* Manual ADC Confirmation using Service Remote control.

After enter Service Mode by pushing “INSTART” key.

4. EDID (The Extended Display

Identification Data)/ DDC(Display Data Channel) Download

4-1. Summary

It is established in VESA, for communication between PC and Monitor without order from user for building user condition. It helps to make easily use realize "Plug and Play" function.

4-2. Required Test Equipment

1) PC (with S/W : EDID Data write & Read)

2) EDID DOWNLOAD JIG

3) HDMI Cable, D-Sub cable

4-3. Connection diagram(Setting of DL device)

4-4. How to download

1) Configure the download environment as shown at the adjustment wiring diagram and turn on the PC.

2) Execute the DDC program. (EDID Data Write & Read)

3) Go to Model -> Open, and select the EDID data of the desired model.

4) Check the item to download from the <Test> item

4-1) HDMI & RGB: Check Digital & Analog 4-2) (Only)HDMI: Check Digital only

5) Press ESC(Cancel Mode) -> F8(Auto Mode). (Set Auto Detecting)

6) Connect the desired signal cable to the set.

7) Make sure that the popup "Proceed to write?" is displayed.

8) Press the Enter key or the space key to download.

9) After downloading, check the OK message and disconnect the connected cable.

4-5. EDID DATA

* It is possible to download on only POWER ON MODE.

O HDMI-I [C/S : 4627]

EDID Block 0 table =

EDID Block 1 table =

O HDMI-II [C/S : 4617]

EDID Block 0 table =

EDID Block 1 table =

- 11 -

LGE Internal Use Only

MODEL : 22LS4D_UA_UA/LPL_LM220WT7

S/W VER : 3.00.1 UTT : 6 ADC CAL.

RGB : OK YPbPr(SD) : OK YPbPr(HD) : OK

1. SYNC LEVEL

2. DTV SNR

3. SCREEN MUTE

4. POWER OFF HISTORY

0. STEREO DETECT

012 3 4 5 67 8 9 ABCDE F

0 00FFFFFFFFFFFF001E6D010001010101

10 00 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23

20 09 48 4C 21 08 00 01 01 01 01 01 01 01 01 01 01

30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 40 88

40 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30

50 40 80 37 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38

60 3F 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC

70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 46

012 3 4 5 67 8 9 ABCDE F

0020318F14784050302 20221023150750

10 67 03 0C 00 10 00 B8 2D 01 1D 00 72 51 D0 1E 20

20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C

30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A

40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A

50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18

60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00

70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 27

012 3 4 5 67 8 9 ABCDE F

0 00FFFFFFFFFFFF001E6D01 000101 0101

10 00 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23

20 09 48 4C 21 08 00 01 01 01 01 01 01 01 01 01 01

30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 40 88

40 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30

50 40 80 37 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38

60 3F 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC

70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 46

012 3 4 5 67 8 9 ABCDE F

0020318F147840503022022102315 0750

10 67 03 0C 00 20 00 B8 2D 01 1D 00 72 51 D0 1E 20

20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C

30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A

40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A

50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18

60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00

70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 17

LGE Internal Use Only

- 12 -

O HDMI-III [C/S : 4607]

EDID Block 0 table =

EDID Block 1 table =

O RGB [C/S : 1467]

EDID Block 0 table =

EDID Block 1 table =

5. White Balance

5-1. Summary

(1) Purpose: to reduce the difference in color temperature

among modules

(2) Principal: A module is in full dynamic range when RGB

Gain on OSD is 192. To adjust the white balance without causing full dynamic range and full data, fix one of RGB Gains at 192 and control the other two by reducing them from 192.

5-2. Required Equipment

(1) Color Analyzer : CA-210 (NCG : CH 9 / WCG : CH12) (2) Automatic adjuster (with automatic adjustment necessity

and the RS-232C communication being possible) (3) Remote control for adjustment (4) Video Signal Generator MSPG-925F 720p,/216Gray

(Model : 217, Pattern 78)=> Applied only when the inner

pattern cannot be used * Use the Color Analyzer with the matrix calibrated by the CS-

1000

5-3. Adjustment command (Protocol)

(1) Protocol

- LEN : Number of Data Byte

- CMD : Command

- VAL : Value of FOS Data

- CS : Checksum

- A : Acknowledge

Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX}

012 3 4 5 67 8 9 ABCDE F

0 00FFFFFFFFFFFF001E6D01 000101 0101

10 00 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23

20 09 48 4C 21 08 00 01 01 01 01 01 01 01 01 01 01

30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 40 88

40 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30

50 40 80 37 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38

60 3F 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC

70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 46

012 3 4 5 67 8 9 ABCDE F

0020318F147840503022022102315 0750

10 67 03 0C 00 30 00 B8 2D 01 1D 00 72 51 D0 1E 20

20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C

30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A

40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A

50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18

60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00

70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 07

012 3 4 5 67 8 9 ABCDE F

0 00FFFFFFFFFFFF001E6D01 000101 0101

10 00 12 01 03 68 73 41 96 0A CF 30 A3 57 4C B0 23

20 09 50 4E A1 08 00 01 01 01 01 01 01 01 01 01 01

30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88

40 35 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30

50 40 80 37 00 C4 8E 21 00 00 1C 00 00 00 FD 00 38

60 3F 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC

70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 14

012 3 4 5 67 8 9 ABCDE F

0 0203040066 21 56B051 001B304070 3600

10 BA 88 21 00 00 1E 00 00 00 00 00 00 00 00 00 00

20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 67

Color Analyzer

Comp uter

Pattern Generator

RS- 23 2C

RS-232C

Probe

Signal Source

Not used when the inner pattern of the TV set is used

Connection Diagram of Automatic Adjustment

LEN CMD VAL

(2) RS-232C Command(Automatic adjustment)

Ex) wb 00 00 : Start Auto-adjustment of white balance.

wb 00 10 : Start Gain Adjustment (Inner pattern) ja 00 ff : Adjustment data jb 00 c0 : … … wb 00 1f : End of Gain adjustment

* (wb 00 20(start), wb 00 2f(end)) -> In the case of Off-

set adjustment wb 00 ff : End of white balance adjustment

(3) Adjustment Map

5-4. Adjustment of White Balance

(Automatic Adjustment)

1) The adjustment condition should be set by the Power On

key.

2) Perform the zero calibration of the Color Analyzer and

place the probe close to the display center.

3) Connect the communication cable (RS-232C).

4) Select the desired model of the adjustment program and

perform the adjustment.

5) After the adjustment is ended (check the OK sign), check

the adjustment condition for each mode of the set.

(Warm, Medium, Cool)

6) Disconnect the probe and the communication cable to end

the adjustment. * The adjustment should be started with "wb 00 00" and

ended with "wb 00 ff", and the offset should be adjusted when necessary.

5-5. Manual white Balance

1) The adjustment condition should be set by the Power On

key.

2) Press the ADJ of the R/C to enter into 'EZ-ADJUST'.

3) Select '10.TEST PATTERN' with the CH +/- key and press

the Enter key for 30 minutes or longer to perform the heat run.

4) Perform the zero calibration of the Color Analyzer and fix

the sensor with the 10cm or less distance at the center of the LCD module surface when adjusting.

5) Press the ADJ of the R/C to select '7.White-Balance' of the

Ez-Adjust and press the right arrow key(

G) to enter into the

adjustment mode. (As soon as you press '

G', the screen is

entered into the full white inner pattern.)

6) Fix one of the R/G/B gains to 192 and decrease the

remaining two gains to adjust not to exceed 192.

7) The adjustment is done at three white balances of Cool,

Medium and Warm.

* The inner pattern is used basically, and if it is not possible,

the adjustment can be done by selecting the HDMI input. NONE, INNER or HDMI can be selected by the bottom option at the Ez Adjust Menu 7.White Balance menu and it is set to INNER as default. If the adjustment cannot be done by the inner pattern, select the HDMI to adjust.

* Adjustment environment and reference

1) Environment illuminance Adjust it to 10 LUX or less at the place where the light source such as lamp should be blocked at maximum.

2) Probe location : Maintain the Color Analyzer (CA-210) close to the

module surface by 10cm or less and keep the probe of the Color Analyzer perpendicular to the module surface (80°~ 100°).

3) Aging time

- Keep the power on after the aging start (with no power

off) to perform the heat run for 15 minutes or longer.

- Make sure that the back light is turned on by using no

signal and the full white pattern or others.

LGE Internal Use Only

- 13 -

RS-232C COMMAND

Meaning

[CMD ID DATA]

wb 00 00 White Balance adjustment start.

wb 00 10 Start of adjust gain (Inner white pattern)

wb 00 1f End of gain adjust

wb 00 20 Start of offset adjust(Inner white pattern)

wb 00 2f End of offset adjust

wb 00 ff

End of White Balance adjust(Inner pattern disappeared)

ITEM Command Data Range Default

(Hex.) (Decimal)

Cmd 1 Cmd 2 Min Max

Cool R-Gain j g 00 C0 TBD

G-Gain j h 00 C0 TBD

B-Gain j i 00 C0 TBD

R-Cut TBD

G-Cut TBD

B-Cut TBD

Medium R-Gain j a 00 C0 TBD

G-Gain j b 00 C0 TBD

B-Gain j c 00 C0 TBD

R-Cut TBD

G-Cut TBD

B-Cut TBD

Warm R-Gain j d 00 C0 TBD

G-Gain j e 00 C0 TBD

B-Gain j f 00 C0 TBD

R-Cut TBD

G-Cut TBD

LGE Internal Use Only

- 14 -

5-6. Reference

(1) Brightness : Full white 216 Gray (2) Standard color coordinate and white balance when using

the CS-1000

(3) Standard color coordinate and white balance when using

the CA-210 (CH 10)

6. HDCP (High-Bandwidth Digital Contents Protection) SETTING

- Set write size to 64 bytes

- Set delay time to 250ms

- Connect D-sub Signal Cable to D-Sub Jack

- Input HDCP key with HDCP-key- in-program

- HDCP Key value is stored on EEPROM(AT24C512) which is 80~A1 addresses of 0xA0~0xA2 page

- AC off/ on and on HDCP button of MSPG925 and confirm whether picture is displayed or not of using MSPG925

- HDCP Key value is different among the sets.

7. Select the option by country

7-1. Overview

1) The option selection is applied to the North American

model only, which selects the rating related country.

2) Applied models: LA89D Chassis applied None USA

Model(Canada, Mexico)

7-2. How to select

1) Press the In-Start key of the R/C and press the red oval

OP1(PIP CH-) key to enter into the Factory Option menu.

2) Select 1.USA, 2.CANADA or 3.MEXICO from the country

select according to the destination. At this time, use the volume +/- key to adjust

7-3. Set the shipping mode (In-stop)

- After completing the final test, in order to set the set to the shipping condition, press the In-Stop key of the R/C to make sure that the set is turned off.

8. GND and resisting pressure test

8-1. How to test

(1) Preparing for the automatic test on the GND & resisting

pressure

- Make sure that the power cord is inserted into the set completely. (When it is disconnected or loosened, test after inserting it)

(2) Perform the automatic test on the GND & resisting pressure

1) The set with power cord, the cord and the A/V

completely inserted into the tuner is loaded on the pallet and entered into the automatic test process.

2) Connect the D-terminal AV JACK tester

3) Turn on the automatic (GWS103-4)

4) Perform the GND TEST

5) If it is not good, the buzzer is operated to notify the test

result to the operator.

6) If it is OK, it is automatically switched to the resisting

pressure test. (Disconnect the cord and the A/V from the AV JACK BOX)

6) Perform the resisting pressure test

7) If it is not good, the buzzer is operated to notify the test

result to the operator.

8) If it is OK, the GOOD LAMP is turned and the stopper is

moves down, and it moves to the next process.

8-2. Items to manage

(1) TEST voltage

- GND : 1.5KV/min at 100mA

- SIGNAL : 3KV/min at 100mA

(2) TEST time:1 second (3) TEST POINT

- GND test = between Power cord GND and Signal cable metal GND

- Resisting pressure test = between Power cord GND and Live & Neutral

(4) LEAKAGE CURRENT: Set to 0.5mArms

Mode Color Coordination Temp ∆UV

COOL 0.276 0.283 11000K 0.0000

MEDIUM 0.285 0.293 9300K 0.0000

WARM 0.313 0.324 6500K 0.0000

Mode Color Coordination Temp ∆UV

COOL 0.276±0.002 0.283±0.002 11000K 0.0000

MEDIUM 0.285±0.002 0.293±0.002 9300K 0.0000

WARM 0.313+0.002 0.324±0.002 6500K 0.0000

+ 31 hidden pages