LG M2762D Diagram

LCD MONITOR TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LD93A

MODEL : M2762D

M2762D-P(W)ZL

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

Internal Use Only

P/NO : MFL62477305(0908-REV00) Printed in Korea

LGE Internal Use Only

- 2 -

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ...............................................................13

TROUBLE SHOOTING ............................................................................17

BLOCK DIAGRAM...................................................................................25

EXPLODED VIEW .................................................................................. 26

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

LGE Internal Use Only

- 3 -

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

When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1

*Base on Adjustment standard

IMPORTANT SAFETY NOTICE

0.15uF

Ω

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 500ºF to 600ºF.

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.

(500ºF to 600ºF) 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

(500ºF to 600ºF)

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

LGE Internal Use Only

- 5 -

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

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SPECIFICATION

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

.

1. Application Range.

1) This spec sheet is applied all of the LCD TV with LD93A chassis.

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

1) Temperature : 25±5°C(77±9°F) , CST: 40±5°C

2) Relative Humidity : 65±10%

3)

Power Voltage : Standard input voltage (100~240V@50/60Hz)

*Standard Voltage of each product 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 : CE,IEC specification

- EMC : CE,IEC specification

4. Electrical Specification

4.1 Module Specification

Model Market Appliance

Safety : IEC/ EN60065

Mx62D

EU

EMI :EN55013

(PAL Market)

EMS : EN55020

No Item Specification Unit Remark

1 Type TFT Color LCD Module

2 Diagonal Size 27 inches( 686.0mm) diagonal

3 Active Display area 597.89( H) 236.31( V) mm

4 Outline Dimension 630( H) x 368.2( V) x 21.6( D) mm Typ. (Without Inverter)

5 Aspect Ratio 16: 9

6 Pixel Number 1920 x RGB x 1080 pixel

7 Pixel Pitch 0.3114( H) x 0.3114 (V) mm

8 Color arrangement RGB vertical Stripe

9 Color Depth 16.7M color

10 Electrical Interface LVDS 2Port

11 Surface Treatment Hard coating( 3H) & Anti- glare( Haze 25)

12 Operating Mode Normally White

13 Backlight Unit 4 CCFL (4 lamps)

14 Response Time Rising Time : 1 + Falling Time : 4 ms Typ.

15 Color Gamut 72%

- M2762D- P(W)ZL : LGD / LM270WF1- TLD1 ( P/ N : EAJ60703601)

- 7 -

LGE Internal Use Only

No Item Specification Remarks

DTV &Analog- UK,France,Germany,Spain,Sweden,Finland,

Italy,Netherland,Belgium,Czech,Luxemburg,Greece,

1 Market EU(PAL Market-26Countries) Denmark,Austria,Hungary,Switzerland,Croatia,Turkey

Analog Only -Poland,Portugal,Norway,Bulgaria,Serbia,

Slovenia,Russia,Romania

1) PAL-BG

2) PAL-DK

2 Broadcasting system 3) PAL-I/I’

4) SECAM L/L’

5) DVB-T

3 Receiving system

Analog : Upper Heterodyne

Digital : COFDM

4 Scart Jack (2EA) PAL,SECAM

Scart 1 Jack is Full scart and support RF-OUT(ATV)

Scart 2 jack is Half scart and support MNT/DTV-OUT.

5 Component Input (1EA) Y/Cb/CrY/Pb/Pr

6 CVBS Input (1EA) PAL,SECAM,NTSC 4 System(Rear):PAL50,SECAM,NTSC,PAL60

7 RGB Input RGB-PC Analog(D-SUB 15Pin)

8 DVI Input DVI-D Digital

9 HDMI Input (2EA)

HDMI1-DTV 1ea(Rear),1ea(Side)

HDMI2-DTV HDMI version 1.3 Support HDCP / Not support PC

10 Audio Input (3EA) RGB/DVI Audio, Component, CVBS L/R Input

11 SPDIF out (1EA) SPDIF out

12 Earphone out (1EA)

Antenna,AV1,AV2,AV3,Component,

RGB,DVI,HDMI1,HDMI2

13 USB (1EA) Picture,Music Software Update +Picture +Music

14 RS-232C (1EA) Commercial Mode

5. General specification

5.1 TV

- 8 -

LGE Internal Use Only

5.2 RGB

No Item Specification Remark

1 Supported Sync.Type Separate Sync.,Digital

Horizontal 30~83kHz

Analog

Vertical 56~75 Hz

2 Operating Frequency

Horizontal 30~83kHz

Digital

Vertical 56~75 Hz

Max. 1360 x 768 @60Hz

Analog

Recommend 1360 x 768 @60Hz

Max. 1360 x 768 @60Hz

M1962D

Digital

Recommend 1360 x 768 @60Hz

Max. 1600 x 900 @60Hz

3 Resolution

Analog

Recommend 1600 x 900 @60Hz

Max. 1600 x 900 @60Hz

M2062D

Digital

Recommend 1600 x 900 @60Hz

Max. 1920 x 1080 @60Hz

Analog

Recommend 1920 x 1080 @60Hz

M2262D/M2362D/M2762D

Max. 1920 x1080 @60Hz

Digital

Recommend 1920 x1080 @60Hz

4 Input Voltage Voltage :100 ~240 Vac,50 or 60Hz

5 Inrush Current Cold Start :50 A/ Hot :120 A

Operating Condition Sync (H/V) Video LED Wattage

On/On Active Blue 40 Max.

M1962D

On/On Active Blue 35 Typ.

On/On Active Blue 60 Max.

M2062D

On/On Active Blue 50 Typ.

6 Power On On/On Active Blue 60 Max.

S/W Mode

M2262D

On/On Active Blue 53 Typ.

On/On Active Blue 65 Max.

M2362D

On/On Active Blue 55 Typ.

On/On Active Blue 70 Max.

M2762D

On/On Active Blue 63 Typ.

Off/On

Sleep mode

On/Off

Off Amber 1W RGB / DVI

Off mode - Off Off 0.5W

19”LGD :50,000 Hours(min)

19”AUO :50,000 Hours(min)

20”LGD :50,000 Hours(min)

Lamp 20”CMO :40,000 Hours(min)

7 MTBF 50,000 HRS with 90%Confidence level Life 22”LGD :50,000 Hours(min)

22”AUO :40,000 Hours(min)

23”LGD :50,000 Hours(min)

27”LGD :50,000 Hours(min)

8 Using Altitude 5,000 m (for Reliability) 3,000m(for FOS)

9 Operating Environment

Temp :10°C ~35°C

Humidity :20 %~80 %

10 Storage Environment

Temp :-10°C ~60°C non condensing

Humidity :5 %~90 %non condensing

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LGE Internal Use Only

6. Chroma & Brightness

6.1 M2362D – LGD Module

No. Item

Specification

Remark

Min typ Max

1. Viewing Angle[CR>10]

Right/Left 70/70 85/85 -

Up/Down 60/70 75/85 -

2. Luminance

Luminance (cd/m

2

) 250 300 -

Variation(%) 75 - -

3. Contrast Ratio CR 700 1000 - Full white/ Full black

White Wx 0.313

Wy 0.329

RED Rx Typ 0.644 Typ DVI or RGB

4. Color Coordinates Ry -0.03 0.336

+0.03

- Standard, 6500K

[CIE 1931] Green Gx 0.301 - Full White (100IRE)

Gy 0.611 - Backlight 100

Blue Bx 0.146

By 0.070

Rise Time Tr

R 1.3 2.6 Condition : DVI or RGB

5. Response Time Decay Time Tr

D 3.7 7.4 Standard, Backlight100

6.3 Optical Test Condition

- Surrounding Brightness Level : dark

- Surrounding Temperature : 25±5°C

- warm-up Time :30 Min

- Contrast,Brightness : Outgoing condition

-.*Incase of Vivid Mode, high level saturation may be occurred. Check gray linearity at standard mode.

6.2 M2762D –LGD Module

No. Item

Specification

Remark

Min typ Max

1. Viewing Angle[CR>10]

Right/Left 70/70 85/85 -

Up/Down 60/70 75/85 -

2. Luminance

Luminance (cd/m2) 250 300 -

Variation(%) 75 - -

3. Contrast Ratio CR 700 1000 - Full White/ Full black

White Wx 0.313

Wy 0.329

RED Rx Typ 0.637 Typ DVI or RGB

4. Color Coordinates Ry -0.03 0.337

+0.03

- Standard, 6500K

[CIE 1931] Green Gx 0.298 - Full White (100IRE)

Gy 0.613 - Backlight 100

Blue Bx 0.147

By 0.057

Rise Time Tr

R 1 4 Condition : DVI or RGB

5. Response Time Decay Time Tr

D 4 8 Standard, Backlight100

Gray to Gray T

GrD_AVR

26

- 10 -

LGE Internal Use Only

No Item Min Typ Max Remark

1. Cool

White Balance,X axis 0.268 0.283 0.298 DQA :±0.015

White Balance,Y axis 0.283 0.298 0.313 DQA :±0.015

2. Medium

White Balance,X axis 0.280 0.295 0.310 DQA :±0.015

White Balance,Y axis 0.290 0.305 0.320 DQA :±0.015 Measurement Condition

3. Warm

White Balance,X axis 0.298 0.313 0.328 DQA :±0.015 PSM :Outgoing condition

White Balance,Y axis 0.314 0.329 0.344 DQA :±0.015 Input signal :White pattern(85IRE)

4. 6500k

White Balance,X axis 0.298 0.313 0.328 DQA :±0.015 Pattern number :78 (MSPG series)

White Balance,Y axis 0.314 0.329 0.344 DQA :±0.015

5. 9300k

White Balance,X axis 0.268 0.283 0.298 DQA :±0.015

White Balance,Y axis 0.283 0.298 0.313 DQA :±0.015

7. Chroma (PSM : PC Mode-Standard, AV Mode-Vivid)

No Item

Luminance(cd/m

2

) C/R(min)

Remark

Typ Max RF,AV,COMPONENT,HDMI

1 M1962D 120 150 500 RF, AV, COMPONENT, HDMI

2 M2062D 170 200 500 Test Condition

3 M2262D 170 200 500 Mode :Outgoing condition

4 M2362D 170 200 500 Input signal : 100IRE White pattern

5 M2762D 170 200 500 (Pattern #4 : MSPG series)

- AV Mode

8.2 Special feature(DFC)

- DFC Working Condition : Full Black Pattern( All Black, No pattern( MSPG Pattern# 2)) signal in D- sub & DVI

No Item Min Typ Max Remark

M1962D/ M2062D/ M2262D/

PC Mode( D- sub, DVI), Mode : Outgoing condition

1

M2362D/ M2762D

40000: 1 50000: 1 -

Input signal : 100 IRE Full white pattern

8. SET Optical Feature

8.1 General feature

- PC Mode

No Item

Luminance(cd/m

2

) C/R

Remark

Min Typ Max Min Typ

1 M1962D 150 180 500 700 RGB &DVI

2 M2062D 200 230 500 700 DFC 50000:1(Typ)

3 M2262D 200 230 500 700 -Mode :Outgoing condition

4 M2362D 200 230 500 700 Input signal :100IRE White pattern

5 M2762D 200 230 500 700 (Pattern #4 :MSPG series)

6.4 Active area

1. Active area of LCD PANEL is in bezel of cabinet.

2. Interval between active area and bezel |A-B| ≤ 1.0 mm , |C-D| ≤ 1.0 mm

A: Interval between left of active area and bezel B: Interval between right of active area and bezel C: Interval between top of active area and bezel D: Interval between bottom of active area and bezel

C

B

D

A

Active Area

Bezel

- 11 -

LGE Internal Use Only

No.

Specification

Remark

Resolution H-freq(kHz) V-freq(Hz) Pixel clock( MHz)

1. 720* 480 15.73 59.94 13.500 SDTV, DVD 480I( 525I)

2. 720* 480 15.75 60.00 13.514 SDTV, DVD 480I( 525I)

3. 720* 576 15.625 50.00 13.500 SDTV, DVD 576I( 625I) 50Hz

4. 720* 480 31.47 59.94 27.000 SDTV 480P

5. 720* 480 31.50 60.00 27.027 SDTV 480P

6. 720* 576 31.25 50.00 27.000 SDTV 576P 50Hz

7. 1280* 720 44.96 59.94 74.176 HDTV 720P

8. 1280* 720 45.00 60.00 74.250 HDTV 720P

9. 1280* 720 37.50 50.00 74.25 HDTV 720P 50Hz

10. 1920* 1080 33.72 59.94 74.176 HDTV 1080I

11. 1920* 1080 33.75 60.00 74.250 HDTV 1080I

12. 1920* 1080 28.125 50.00 74.250 HDTV 1080I 50Hz,

13. 1920* 1080 56.25 50 148.5 HDTV 1080P

14. 1920* 1080 67.432 59.94 148.350 HDTV 1080P

15. 1920* 1080 67.5 60.00 148.5 HDTV 1080P

9. Component Video Input (Y, PB , PR)

10. RGB/DVI INPUT (PC)

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

1. 720*400 31.468 70.08 28.321

2. 640*480 31.469 59.94 25.175

3. 640*480 37.5 75 31.5

4. 800*600 37.879 60.317 40.0

5. 800*600 46.875 75.0 49.5

6. 1024*768 48.363 60.0 65.0

7. 1024*768 60.123 75.029 78.75

8. 1152*864 67.500 75.000 108.0

9. 1280*1024 63.981 60.02 108.0

10. 1280*1024 79.976 75.035 135.0

11. 1680*1050 64.674 59.883 119.0

12. 1680*1050 65.290 59.954 146.25

13. 1600*1200 75.0 60.0 162.0

14. 1920*1080 66.587 59.934 138.5

- 12 -

LGE Internal Use Only

11. HDMI INPUT(DTV)

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

1 720* 480 31.469 / 31.5 59.94 / 60 27.00/ 27.03 SDTV 480P

2 720* 576 31.25 50 27.864 SDTV 576P

3 1280* 720 37.500 50 74.25 HDTV 720P

4 1280* 720 44.96 / 45 59.94 / 60 74.17/ 74.25 HDTV 720P

5 1920* 1080 33.72 / 33.75 59.94 / 60 74.17/ 74.25 HDTV 1080I

6 1920* 1080 28.125 50.00 74.25 HDTV 1080I

7 1920* 1080 27 24 74.25 HDTV 1080P

8 1920* 1080 33.75 30.00 74.25 HDTV 1080P

9 1920* 1080 56.250 50 148.5 HDTV 1080P

10 1920* 1080 67.43 / 67.5 59.94 / 60 148.35/ 148.50 HDTV 1080P

10.2 EDID Data (Product ID : 22382)

10.1 EDID Data (Product ID : 22381)

LGE Internal Use Only

- 13 -

ADJUSTMENT INSTRUCTION

1. Application

This document is applied to LD93A chassis 19/20/22/23/27” LCD Monitor TV which is manufactured in TV (or Monitor) Factory or is produced on the basis of this data.

2. Designation

2.1 The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.

2.2. Power Adjustment: Free Voltage

2.3. Magnetic Field Condition: Nil.

2.4. Input signal Unit: Product Specification Standard

2.5. Reserve after operation: Above 5 Minutes (Heat Run)

Temperature : at 25°C ± 5°C Relative humidity : 65 ±10% Input voltage : 220V, 60Hz

2.6. Adjustment equipment: Color Analyzer (CA-210 or CA-

110), Pattern Generator (MSPG-925L or Equivalent), DDC Adjustment Jig equipment, SVC remote controller

2.7. Don’t push The “IN STOP KEY” after completing the

function inspection.

3. Tool Option

4. Main PCB check process

• APC - After Manual-Insult, executing APC

4.1 Download

1. Execute ISP program "Mstar ISP Utility" and then click

"Config" tab.

2. Set as below, and then click "Auto Detect" and check "OK"

message. If display "Error", Check connect computer, jig, and set.

3. Click "Connect" tab.

If display "Can’t ", Check connect computer, jig, and set.

4. Click "Read" tab, and then load download file(XXXX.bin) by clicking "Read"

5. Click "Auto" tab and set as below

6. Click "Run".

7. After downloading, check "OK" message.

(1) (3)

Please Check the Speed :

To use speed between

from 200KHz to 400KHz

(4)

filexxx.bin

(7)

(5)

(8) ……….OK

(6)

Model Module Tool option

M1962D-P(W)ZL

LGD 4301

AUO 37069

M2062D-P(W)ZL

LGD 4557

CMO 20941

M2262D-P(W)ZL LGD/AUO 4813 / 37581

M2362D-P(W)ZL LGD 5069

M2762D-P(W)ZL LGD/CMO 5325 / 21709

LGE Internal Use Only

- 14 -

4.2 DOWNLOAD USB

1. Put the USB Stick to the USB socket

2. Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low, it didn’t work. But your downloaded version is High, USB data is automatically detecting

3. Show the message “Copying files from memory”

4. Updating is staring.

5. Updating Completed, The TV will restart automatically.

6. If your TV is turned on, check your updated version and Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have, TV can

lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn’t have a DTV/ATV test on production line.

* After downloading, have to adjust TOOL OPTION again.

1. Push "ADJ" key in service remote controller

2. Select "1.Tool Option" and Push “OK” button

3. Punch in the number. (Each model has their number.)

4. Completed selecting Tool option

4.3 ADC Process

4.3.1 ADC Calibration Internal : ADC is executed automatically using internal pattern.

- If ADC is executed by ADC Calibration Internal, RGB and Component is executed at the same time.

· Remove the all input jack from set.

· Press the ADJ KEY on R/C and enter EZ ADJUST.

· Press “Power only” key of service remocon.(Baud rate : 115200 bps).

· Select “3. ADC CALIBRATION Internal” by using / (CH +/-) and press ENTER( ).

· Select “Start” and press navigation key( ).

· ADC Calibration Internal is executed automatically.

· Press EXIT key on R/C

4.3.2 ADC Calibration External

( If ADC calibration had done in internal process, It doesn’t need to use this process.)

1) Auto RGB Gain/Offset Adjustment

· Convert to PC in Input-source

· Signal equipment displays

Output Voltage: 700 mVp-p Impress Resolution XGA (1024 x 768 @ 60Hz) Model : 60 in Pattern Generator Pattern : 29 in Pattern Generator (MSPG-925 SERISE)

Adjustment pattern (PC )

· Press the ADJ KEY and then select “2.ADC CALIBRATION

External” by using

/

(CH +/-) and press ENTER( ).

!

EZ ADJUST

1. Tool Option : 1229

2. ADC CALIBRATION External : DTV

3. ADC CALIBRATION Internal

4. ADC ADJUST

5. W/B ADJUST

6. WHITE PATTERN : OFF

7. EDID D.L

Tool Option : 1229

Model Name : M2794DP-PZ

Inch : 27 Tool : Mx94DP

DSUB Port : RGB 0 (NEW)

Media Player : EMF-PM HDMI Type : 3-HDMI

OK to Download  DOWNLOAD:

- 15 -

LGE Internal Use Only

1-1) Confirmation

· We confirm whether “0xAA (RGB)” address of EEPROM “0xA2” is “0xAA” or not.

· If “0xAA (RGB)” address of EEPROM “0xA2” isn’t “0xAA”, we adjust once more

· We can confirm the ADC values from “0xA4~0XA9 (RGB)” addresses in a page “0xA2”

*Manual ADC process using Service Remocon. After enter Service Mode by pushing “ADJ” key, execute “4.ADC Adjust” by

pushing “ ” key at “ADC CALIBRATION: RGB”.

2) Component Gain/Offset Adjustment

· Convert to Component in Input-source

· Signal equipment displays

Impress Resolution 1080i MODEL: 223 in Pattern Generator(1080i Mode) PATTERN: 65 in Pattern Generator(MSPG-925 SERISE)*

Adjustment pattern (COMPONENT )

· Press the ADJ KEY and then select “2.ADC CALIBRATION

External” by using

/

(CH +/-) and press ENTER( ).

2-1) Confirmation

· We confirm whether “0xB3 (480i)/0xBC (1080i)” address of EEPROM “0xA2” is “0xAA” or not.

· If “0xB3 (480i)/0xBC(1080i)” address of EEPROM “0xA2” isn’t “0xAA”, we adjust once more

· We can confirm the ADC values from “0xAD~0XB2 (480i)/0XB6~BB (1080i)” addresses in a page “0xA2”

*Manual ADC process using Service Remocon. After enter Service Mode by pushing “ADJ” key, execute “ADC Adjust” by

pushing " "key at “ADC CALIBRATION :COMPONENT”. Impress Resolution 1080i

4.4 Function Check

1) Check display and sound

· Check Input and Signal items. (cf. work instructions)

1. TV

2. AV (SCART1/SCART2/CVBS)

3. COMPONENT (1080i)

4. RGB (PC : 1360 x 768 @ 60Hz –M1962D) (PC : 1600 x 900 @ 60Hz –M2062D) (PC : 1920 x 1080 @ 60hz –M2262D&M2362D/M2762D)

5. DVI (PC : 1360 x 768 @ 60Hz –M1962D) (PC : 1600 x 900 @ 60Hz –M2062D) (PC : 1920 x 1080 @ 60hz –M2262D&M2362D/M2762D)

6. HDMI

7. PC Audio In

* Display and Sound check is executed by Remote controller.

5. Total Assembly line process

5.1 Adjustment Preparation

· W/B Equipment condition CA210: CH 9, Test signal: Inner pattern (85IRE)

· Above 5 minutes H/run in the inner pattern. (“power on” key of

adjust remote control)

· 15 Pin D-Sub Jack is connected to the AUTO W/B

EQUIPMENT.

· Adjust Process will start by execute I2C Command (Inner

pattern (0xF3, 0xFF).

* Caution

Color Temperature: COOL, Medium, Warm One of R Gain/G Gain/ B Gain should be kept on 0xC0, and adjust other two lower than C0. (when R/G/B Gain are all C0, it is the FULL Dynamic Range of Module)

EZ ADJUST

1. Tool Option : 1261

2. ADC CALIBRATION External : Component

3. ADC CALIBRATION Internal

4. ADC ADJUST

5. W/B ADJUST

6. WHITE PATTERN : OFF

7. EDID D.L

4. ADC ADJUST

MODE : RGB

R-GAIN : 115 G-GAIN : 114 B-GAIN : 114

R-OFFSET : 137 G-OFFSET : 131 B-OFFSET : 137

EZ ADJUST

1. Tool Option : 1229

2. ADC CALIBRATION External : DTV

3. ADC CALIBRATION Internal

4. ADC ADJUST

5. W/B ADJUST

6. WHITE PATTERN : OFF

7. EDID D.L

Tool Option : 1229

Model Name : M2794DP-PZ

Inch : 27 Tool : Mx94DP

DSUB Port : RGB 0 (NEW)

Media Player : EMF-PM HDMI Type : 3-HDMI

OK to Download  DOWNLOAD:

Cool

9,300k

o

K

X=0.285 (±0.003)

Y=0.293 (±0.003)

Medium

8,000k

K

X=0.295 (±0.003)

Y=0.305 (±0.003)

Color

Temperature

Warm

6,500k

K

X=0.313 (±0.003)

Y=0.329 (±0.003)

M1962D

M2062D

M2262D

M2362D

M2762D

Inner pattern

(216gray,85IRE)

Cool

Min : 120

Typ : 170

Medium

Min : 120

Typ : 170

Warm

Min : 120

Typ : 170

M1962D

Cool

Min : 170

Typ : 220

Medium

Min : 170

Typ : 220

Luminance

(cd/m )

Warm

Min : 170

Typ : 220

M2062D M2262D M2362D M2762D

Inner pattern

(216gray,85IRE)

2

o

- 16 -

LGE Internal Use Only

5.2 W/B condition

- Surrounding Temperature : 20 % ~ 80 %

- Surrounding Temperature : 25±5 °C

- warm-up Time : Under 5 Min

* Manual W/B process using adjusts Remote control.

· After enter Service Mode by pushing “ADJ” key,

· Enter White Pattern off of service mode, and change off -> on.

· Enter “W/B ADJUST” by pushing " " key at “5. W/B ADJUST”.

* After done all adjustments, Press “In-start” button and compare

Tool option and Area option value with its BOM, if it is correctly same then unplug the AC cable.

If it is not same, then correct it same with BOM and unplug AC cable. For correct it to the model’s module from factory JIG model.

* Don’t push The “IN STOP KEY” after completing the function

inspection.

* When doing Adjustment, Please make circumstance as below.

5.3 DPM operation confirmation

Check if Power LED Color and Power Consumption operate as standard.

· Set Input to RGB and connect D-sub cable to set

· Measurement Condition: (100~240V@ 50/60Hz)

· Confirm DPM operation at the state of screen without Signal

5.4 DDC EDID Write (RGB 128Byte )

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

· Write EDID DATA to EEPROM (24C02) by using DDC2B protocol.

· Check whether written EDID data is correct or not.

5.5 DDC EDID Write (DVI 128Byte )

· Connect DVI-D Signal Cable to DVI Jack.

· Write EDID DATA to EEPROM (24C02) by using DDC2B protocol.

· Check whether written EDID data is correct or not.

5.6 DDC EDID Write (HDMI 256Byte)

· Connect HDMI Signal Cable to HDMI Jack.

· Write EDID DATA to EEPROM(24C02) by using DDC2B protocol.

· Check whether written EDID data is correct or not.

5.7 Serial number (RS-232C)

· press “Power on” key of service remocon.(Baud rate : 115200 bps)

· Connect RS232 Signal Cable to RS-232 Jack.

· Write Serial number by use RS-232.

· Must check the serial number at the Diagnostics of SET UP menu. (Refer to below).

5.8 EDID DATA

· EDID download

1) Press “Power only” key of service remocon.(Baud rate :

115200 bps).

2) Press the ADJ KEY on R/C and enter EZ ADJUST

3) Select “7.EDID D/L” by using

/

(CH +/-) and press

ENTER( ).

4) Select “Start” and press navigation key( ).

5) EDID download is executed automatically.

6) Press EXIT key on R/C.

MODE : DTV

TEMPERATURE : Cool R-GAIN : 192 G-GAIN : 192 B-GAIN : 192

R-OFFSET : 128 G-OFFSET : 128 B-OFFSET : 128 COPY ALL

EZ ADJUST

1. Tool Option : 1261

2. ADC CALIBRATION External : Component

3. ADC CALIBRATION Internal

4. ADC ADJUST

5. W/B ADJUST

6. WHITE PATTERN : OFF

7. EDID D.L

7. EDID D/L

RGB : OK HDMI 1 : OK HDMI 2 : OK DVI : OK

Start

Reset

LGE Internal Use Only

- 17 -

TROUBLESHOOTING

Check P1101 All

Voltage Level (15V, 5V)

Check Power connector

OK ?

Replace Power board

NN

Check IC1104 output

Voltage Level (1.8V)

Replace IC1104 &

Recheck

N

Check X101 Clock

12MHz

Replace X101

N

Replace IC105 Flash

Memory

Check IC1102 Output

Voltage Level (3.3V)

Replace IC1102

N

Y

Wave form of X101

Check IC1107 output

Voltage Level (5V)

Replace IC1107 &

Recheck

N

Check IC1105 Output

Voltage Level (12V)

Replace IC1105

N

Y

1. Power- Up Boot Fail Trouble Shooting

LGE Internal Use Only

- 18 -

Check GPIO Path

2. No OSD Trouble Shooting

(Refer to Appendix 1.)

IC100 has problem

1. Replace Power Board

2. Replace IC1107

Replace Cable

N

INV_ON high

Check P1101(#9)

N

Y

N

Check P1103

Y

#13, #14, #25, #26

N

conductors.

Control board

Check LCD Module

(Refer to Module CAS)

1. Check Power Board, 15V

2. Check IC1107 Output voltage(5V)

3. Check P1103(#1,2,3) 5V Check LVDS Cable for damage or open

Check RF Cable

Check TP Clock, Data, Sync

R521, R532, R533

Maybe Tuner(IC500) has problems

Check P1103

#13, #14, #25, #26

Y

N

Check Tuner 5V Power &

Q1105 5V

Replace Q1105

Y

N

Y

Replace IC100 has problems

N

Y

Check LD500 color

Bad Tuner. Replace Tuner.

None

Yellow ∆ none

Check Demodulator Input Clock

X500 (31.875MHz), X501(20.48MHz)

Replace X500

Replace X501

N

Y

Check LCD Module

Control board

Refer to Module CAS

Wave form of X500

LGE Internal Use Only

- 19 -

3. Digital TV Video Trouble Shooting

LGE Internal Use Only

- 20 -

4. Component Video Trouble Shooting

Check input signal format

Is it supported?

Check signal

C121,C122,C123

Check R164,R144,R145

C121,C122,C123

Y

N

Check JK700

Replace JK700 or Check

Device

Y

N

Y

IC100 has problem

Y

Check Component Cable

Wave form of C121

Wave form of C122

Wave form of C123

Wave form of Comp Y

Wave form of Comp Pb

Wave form of Comp Pr

LGE Internal Use Only

- 21 -

5. RGB Video Trouble Shooting

Check input signal format

Is it supported?

Check signal, Hsync, Vsync

(R729, R730)

Replace R729, R730

Check signal RGB

(R158,R160,R162

C115,C117,C119)

Y

N

Check JK703

Replace JK703

Y

N

Y

Replace R158,R160,R162,

C115,C117,C119

N

IC100 has problem

Y

Check RGB Cable connector

for damage

Y

Wave form of R730(Vsync)

Wave form of R729(Hsync)

Wave form of R160/C117

Wave form of R158/C115

Wave form of R162/C119

- 22 -

LGE Internal Use Only

6. AV Video Trouble Shooting

Check input signal format

Is it supported?

Check signal

R164, R144, R155,

C121, C122, C123

Replace R164, R144, R155,

C121, C122, C123

Y

N

Check signal R771(AV_CVBS)

Replace R771

Y

N

Y

IC100 has problem

Check AV Cable for damage or

open connector

Y

Wave form of R771(CVBS)

LGE Internal Use Only

- 23 -

7.HDMI Video Trouble Shooting

Check input signal format

Is it supported?

Y

Check JK900 / JK901 for proper connection or

damage

Replace connector

Y

N

Y

Check HDMI Cable for damage or open

connector

Check EDID NVRAM

(IC902,IC903)

Power & I2C Signal (#5, #6)

Redownload EDID data or Replace IC901/IC902

Y

N

Check HDCP Key NVRAM (IC102)

Power & I2C Signal (#5, #6)

Replace IC102

Y

N

Replace Mstar(IC100)

- 24 -

LGE Internal Use Only

8. All Source Audio Trouble Shooting

Make sure you can’t hear any audio

and Device support the audio signal

normally.

Check Speaker and its wire

connection (P1000)

And the resistance

Check Signal from IC1000

L104, L105, L106, L107

Y

Replace IC1000

N

Check 15V From Power board

(P1101, Pin#1,2)

And Check Audio Amp Power 12V

(IC1000)

Y

Replace Power Board or Check

L1002/ L1003

N

Y

Check Signal from IC101

(R1008, R1009, R179, R180)

Y

Replace IC100

N

Replace connector or Speaker

N

LGE Internal Use Only

- 25 -

BLOCK DIAGRAM

LVDS

SC2_L/R_IN

MSD237HFG

(Saturn4)

(IC100)

TAS5709

(IC1000)

SP (R)

SP (L)

CI Slot

(P800)

24C02

KIA7427

(IC105)

24C512

(IC101)

I2C_D_TU

IR / H.P JACK

TV_CVBS+

DDR Memory

512Mbx2 (IC300/1)

DSUB_R/G/B/H/V

PC_L/R_IN

COMP_Y/Pb/Pr

COMP_L/R_IN

MAX3232

(IC700)

RS232C_TX/RX

HDMI_I2C

HDMI_TMDS

USB_DM/DP

PCM_ADD

PCM_DATA

TS_Parallel

TU_TS_DATA/TU_ERROR

74LVC541A

(IC800)

PCM_CD_ON

CI_CD_1/2

SPK_L/R_OUT

P401

KEY1/2

LED_RED/Light SENSE

Flash Memory

16MB (IC104)

SC1_CVBS_IN

SC2_CVBS_IN

SC1_TV_VOUT

DTV/MNT_V_OUT

SC1_L/R_IN

TV_L/R_OUT

DTV/MNT_L/R_OPOUT

LCD Panel

(P402)

19” : 1366x768

20” : 1600x900

22” : 1920x1080

23” : 1920x1080

27” : 1920x1080

RESET SYSTEM_I2C

TS_Serial

TPA6132

(IC1002)

H/phone_L/R_OUT

Tuner

24C02

SPI

DDR

DDC_I2C/UART

J1000

SPDIF_OUT

OPTIC

SCART

Component

DSUB

USB

RS232

DVI

-

D

HDMI1_Rear

HDMI2_Side

MSG1040

(IC103)

I/O Expander (for Input Detection)

COMP_DET

HEADPHONE_DET

CVBS_DET

S-VIDEO_DET

USB_OCD

SCART1_DET

SCART2_DET

I2C_EXPANDER

Composite

CVBS_V/L/R_IN

LM324D

(IC600)

DTV/MNT_L/R_OUT

TV_L/R_OPOUT

XC5000

(IC500)

SC1_R/G/B

DRX3913K-XK

(IC501)

DTV_IF_P/N

SIF+

I2C_D_TU

PC Audio

IN

24C02

DVI_TMDS

24C08

(IC102)

HDCP Key

HDMI_I2C

HDMI_TMDS

P402

LGE Internal Use Only

- 26 -

EXPLODED VIEW

300

510

200

301

122

120

540

900

530

400

910

550

520

800

810

500

302

511

501

LV1

A2

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

LG M2762D Diagram

Specifications and Main Features

Frequently Asked Questions

User Manual