LG Electronics 425020, 425010, 425030 User Manual

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LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LD84D

MODEL : 42LG5010

42LG5010-ZD

42LG5020

42LG5020-ZB

42LG5030

42LG5030-ZE

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LGE Internal Use Only

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CONTENTS

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

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

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

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

TROUBLE SHOOTING............................................................................22

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

EXPLODED VIEW .................................................................................. 29

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

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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 Replacement Parts List. 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

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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

circuitboard 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

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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.

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SPECIFICATION

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

4. General Specification

No Item Specification Remark

1 Display Screen Device 37/42/47/52" wide Color Display Module LCD 2 Aspect Ratio 16:9 3 LCD Module 37" TFT LCD FHD MAKER : 37"- LPL

42" TFT LCD FHD 42"- AUO 47" TFT LCD FHD 47"- CMO 52" TFT LCD FHD 52"- SHARP

4 Operating Environment Temp. : 0 ~ 40 deg

Humidity : 0 ~ 85% LGE SPEC

5 Storage Environment Temp. : -20 ~ 60 deg

Humidity : 0 ~ 85 % 6 Input Voltage AC100 ~ 240V, 50/60Hz 7 Power Consumption Power on (Green)

37" ≤ 132W ( 7.86 + 125 W) LG5000

42" ≤ 197W (13.2 + 184 W) LCD + Backlight

47" ≤ 242W (26.4 + 216.1 W)

52" ≤ 335W (20.16 + 315 W) 8 Type Size 37" 877(H) x 516.8(V) x 55.5(D) LG5000

42" 983.0(H) x 576.0(V) x 52.7(D) With inverter

47" 1096.0(H) x 640.0(V) x 51.0(D)

52" 1219.0(H) x 706.7(V) x 64.6(D) 9 Pixel Pitch 37" 0.42675(H) x 0.42675(V) LG5000

42" 0.4845

47" 0.5415 (H) x 0.1805(V)

52" 0.600(H) x 0.600(V)

10 Back Light 37" TBD(EEFL), Straight type LG5000

42" 18pcs, Straight type

47" 20CCFL, Straight type

52" 24CCFTs, direct type

11 Display Colors 16.7M (16,777,216) 12 Coating 3H, AG

1. Application Range.

This spec sheet is applied to the 37"/42"/47"/52" LCD TV used LA84A chassis.

2. Specification

Each part is tested as below without special appointment

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

2.2 Relative Humidity : 65±10%

2.3 Power Voltage : Standard input voltage

(100~240V@ 50/60Hz)

• Standard Voltage of each products 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 5 minutes prior to

the adjustment.

3. Test method

3.1 Performance : LGE TV test method followed.

3.2 Demanded other specification Safety : CE, IEC specification EMC : CE, IEC

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5. MODEL General Specification

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LGE Internal Use Only

No Item Specification Remarks

1 Broadcasting system 1) PAL-BG

2) PAL-DK

3) PAL-I/I’

4) SECAM L/L’

5) DVB-T (ID TV)

2 Receiving system Analog : Upper Heterodyne

Digital : COFDM

3 Scart Jack (2EA) PAL, SECAM Scart 1 Jack is Full scart and support

RF-OUT(analog) Scart 2 jack is Half scart and support MNT/DTV-OUT.

4 Video Input RCA(1EA) PAL, SECAM, NTSC 4 System :

PAL, SECAM, NTSC, PAL60

5 S-Video Input (1EA) PAL, SECAM, NTSC 4 System :

PAL, SECAM, NTSC, PAL60

6 Component Input (1EA) Y/Cb/Cr

Y/Pb/Pr 7 RGB Input RGB-PC Analog(D-SUB 15PIN) 8 HDMI Input (3EA) HDMI1-DTV/DVI PC(HDMI version 1.3)

HDMI2-DTV Support HDCP

HDMI3-DTV 9 Audio Input (3EA) RGB/DVI Audio L/R Input

Component

10 SDPIF out (1EA) SPDIF out 11 Earphone out (1EA) Antenna, AV1, AV2, AV3, Component,

RGB, HDMI1, HDMI2, HDMI3

12 USB (1EA) For service only

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6. Chroma & Brightness

6.1 37"LCD Module

1) Standard Test Condition (The unit has been ‘ON’)

2) Stable for approximately 30 minutes in a dark environment at 25±2_

3) The values specified are at approximate distance 50Cm from the LCD surface

4) Ta= 25±2°C, VLCD=12.0V, fV=60Hz, Dclk=148.5MHz VBR_A=1.6V, ExtVBR_B=100%

6.2 42"LCD Module

1) Standard Test Condition(The unit has been ‘ON’)

2) Stable for approximately 60 minutes in a dark environment at 25_

3) The values specified are at approximate distance 50Cm from the LCD surface

No. Item Specification Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 89

2. Luminance Luminance (cd/m2) 400 500 Variation - 1.3 MAX / MIN

3. Contrast Ratio CR 1000 1500

4. CIE Color Coordinates White WX Typ 0.280 Typ AUO(42")

WY -0.03 0.290 +0.03

RED Xr 0.640

Yr 0.330

Green Xg 0.290

Yg 0.600

Blue Xb 0.150

Yb 0.060

No. Item Specification Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 89

2. Luminance Luminance (cd/m2) 400 500 Variation - 1.3 MAX / MIN

3. Contrast Ratio CR 1000 1400

4. CIE Color Coordinates White WX Typ 0.279 Typ LPL(37")

WY -0.03 0.292 +0.03

RED Xr 0.641

Yr 0.334

Green Xg 0.291

Yg 0.614

Blue Xb 0.145

Yb 0.062

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LGE Internal Use Only

6.3 47"LCD Module

1) Stable for approximately 60 minutes in a dark environment at 25±2_ and windless room

2) Ambient Humidity: 50±1%RH

3) Supply Voltage: 12V

4) Lamp Current: 5.2±0.5mA

5) Oscillating Frequency: 66±3KHz

6) Frame rate: 60Hz

6.4 52"LCD Module

1) Standard Test Condition (The unit has been ‘ON’)

2) Stable for approximately 30 minutes in a dark environment at 25±2_

3) The values specified are at approximate distance 40Cm from the LCD surface

4) Ta=25°C, Vcc=12.0V, VINV =24.0V, VBRT=3.3V, Timing: 60Hz (typ. value)

5) Measurement condition: Set the value of VBRT to maximum luminance of white.

No. Item Specification Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 70 88

2. Luminance Luminance (cd/m2) 360 450 Variation - 1.25 MAX / MIN

3. Contrast Ratio CR 1000 1500

4. CIE Color Coordinates White WX Typ 0.272 Typ SHARP(52")

WY -0.03 0.277 +0.03

RED Xr 0.640

Yr 0.330

Green Xg 0.280

Yg 0.600

Blue Xb 0.150

Yb 0.060

No. Item Specification Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 80 88

2. Luminance Luminance (cd/m2) 450 500 Variation - 1.3 MAX / MIN

3. Contrast Ratio CR 1800 2000

4. CIE Color Coordinates White WX Typ 0.280 Typ CMO(47")

WY -0.03 0.285 +0.03

RED Xr 0.638

Yr 0.331

Green Xg 0.272

Yg 0.590

Blue Xb 0.144

Yb 0.068

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8. Component Video Input (Y, PB

, PR)

9. RGB PC

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

1. 720*400 31.468 70.08 28.321

2. 640*480 31.469 59.94 25.17 VESA

Input 848x480 60Hz, 852x480 60Hz

37.684 75.00 31.50 => 640x480 60Hz Display

3 800*600 37.879 60.31 40.00 VESA

46.875 75.00 49.50

4. 832*624 49.725 74.55 57.283 Macintosh

5 1024*768 48.363 60.00 65.00 VESA(XGA)

56.470 70.00 75.00

60.123 75.029 78.75 6 1280*768 47.78 59.87 79.5 WXGA 7 1360*768 47.72 59.8 84.75 WXGA 8 1366*768 47.56 59.6 84.75 WXGA 9 1280*1024 63.595 60.0 108.875 SXGA FHD Model only

10 1920*1080 66.647 59.988 138.625 WUXGA FHD Model only

7. SET Optical Feature

(Measurement Condition: Full white/ Dynamic) -> Measure the black luminance after 30 seconds.

No Item module

Luminance (min) C/R(min)

Remark

AV, COMPONENT, HDMI AV, COMPONENT, HDMI

1 37 inch LPL 400cd/m

1000 LG5000

3 42 inch AUO 400cd/m

1000

C/R is excepted for PC mode.

3 47 inch CMO 400cd/m

1000

4 52 inch SHARP 360cd/m

1000

No.

Specification

Remark

Resolution H-freq(kHz) V-freq(Hz)

1. 720x480 15.73 60.00 SDTV, DVD 480i

2. 720x480 15.63 59.94 SDTV, DVD 480i

3. 720x480 31.47 59.94 SDTV, 480p

4. 720x480 31.50 60.00 SDTV, 480p

5. 720x576 15.625 50.00 SDTV, DVD 625 Line

6. 720x576 31.25 50.00 HDTV 576p

7. 1280x720 45.00 60.00 HDTV 720p

8. 1280x720 44.96 59.94 HDTV 720p

9. 1280x720 37.50 50 HDTV 720p 50Hz

10. 1920x1080 31.25 50.00 HDTV 1080i

11. 1920x1080 33.75 60.00 HDTV 1080i

12. 1920x1080 33.72 59.94 HDTV 1080i

13. 1920x1080 56.25 50.00 HDTV 1080P

14. 1920x1080 67.433 59.94 HDTV 1080P

15. 1920x1080 67.50 60 HDTV 1080P

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10. HDMI Input (DTV)

11. HDMI Input (PC)

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

1. 720*480 31.47 59.94 27.00 SDTV 480P(4:3)

2. 720*480 31.50 60 27.027 SDTV 480P(4:3)

3. 640*480 31.469 59.94 25.175 SDTV 480P(4:3)

4. 640*480 31.469 60.00 25.20 SDTV 480P(4:3)

5. 720*480 31.47 59.94 27.000 SDTV 480P(16:9)

6. 720*480 31.50 60.00 27.027 SDTV 480P(16:9)

7. 720*576 31.25 50.00 27.000 SDTV 576P

8. 1280*720 37.50 50.00 74.176 HDTV 720P HDCP

9. 1280*720 44.96 59.94 74.176 HDTV 720P HDCP

10. 1280*720 45.00 60.00 74.250 HDTV 720P HDCP 11 1920*1080 33.72 59.94 74.176 HDTV 1080I HDCP 12 1920*1080 33.75 60.00 74.250 HDTV 1080I HDCP 13 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz HDCP 14 1920*1080 27.000 24.00 74.250 HDTV 1080P 24Hz HDCP 15 1920*1080 56.250 50 148.500 HDTV 1080P 50Hz HDCP 16 1920*1080 67.433 59.94 148.352 HDTV 1080P HDCP 17 1920*1080 67.500 60 148.500 HDTV 1080P HDCP

NoResolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remarks

1. 720*400 31.468 70.08 28.321 HDCP

2. 640*480 31.469 59.94 25.17 VESA HDCP

37.684 75.00 31.50

3 800*600 37.879 60.31 40.00 VESA HDCP

46.875 75.00 49.50

4. 832*624 49.725 74.55 57.283 Macintosh HDCP 5 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

56.470 70.00 75.00

60.123 75.029 78.75 6 1280*768 47.78 59.87 79.5 WXGA HDCP 7 1360*768 47.72 59.8 84.75 WXGA HDCP 8 1366*768 47.56 59.6 84.75 WXGA HDCP 9 1280*1024 63.595 60.0 108.875 SXGA FHD Model only, HDCP

10 1920*1080 66.647 59.988 138.625 WUXGA FHD Model only, HDCP

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12. Mechanical specification

12-1. 37LG5000

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm Dimension Before Packing 936.4 293.8 684.4 mm With Stant

After Packing 1195 253 665 mm

2. Product Only SET 18.3 Kg

With BOX 23 Kg

12-2. 42LG5000

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm Dimension Before Packing 1034 293.4 735 mm With Stant

After Packing 1330 257 772 mm

2. Product Only SET 23.5 Kg

With BOX 26.2 Kg

12-3. 47LG50

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm Dimension Before Packing 1156.2 342.9 813.1 mm With Stant

After Packing 1266 460 887 mm

2. Product Only SET 29.5 Kg

With BOX 35.4 Kg

12-4. 52LG5000

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm Dimension Before Packing 1291.7 342.9 892.2 mm With Stant

After Packing 1386 411 976 mm

2. Product Only SET 39.5 Kg

With BOX 46.2 Kg

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ADJUSTMENT INSTRUCTION

1. Application Range

These instructions are applied to all of the LCD TV, LD84D Chassis.

2. Notice

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 equipments: 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. Main PCB check process

O APC - After Manual-Insult, executing APC

O 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)

(2) OK

Controllare la frequenza: Usare una frequenza da 200KHz a 400KHz

(4)

filexxx.bin

(5)

(6)

(8)...........OK

(7)

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- 14 -

LGE Internal Use Only

O USB DOWNLOAD

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.

O After downloading, have to adjust TOOL OPTION again.

1. Push "IN-START" key in service remote controller

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

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

4. Completed selecting Tool option

3.1 ADC Process

3.1.1 PC input ADC

3.1.1.1 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 : 65 in Pattern Generator (MSPG-925 SERISE)

Adjustment pattern (PC )

- Adjust by commanding AUTO_COLOR_ADJUST.

3.1.1.2 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 "ADC Adjust" by pushing "

" key at "ADC

CALIBRATION: RGB-PC".

3.2.1 COMPONENT input ADC

3.2.1.1 Component Gain/Offset Adjustment

- Convert to Component in Input-source

- Signal equipment displays

Impress Resolution 480i

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MODEL: 209 in Pattern Generator(480i Mode) PATTERN : 65 in Pattern Generator( MSPG-925 SERISE)

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

Adjustment pattern (COMPONENT )

- Adjust by commanding AUTO_COLOR_ADJUST.

3.2.1.2 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 480i

Impress Resolution 1080i

3.2 Function Check

3.2.1 Check display and sound

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

1. TV

2. AV (SCART1/SCART2/S-VHS/CVBS)

3. COMPONENT (480i)

4. RGB (PC : 1024 x 768 @ 60hz)

5. HDMI

6. PC Audio In

* Display and Sound check is executed by Remote controller.

4. Total Assembly line process

4.1 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).

- Adjust Process will finish by execute I2C Command (Inner pattern (Inner pattern (0xF3,0x00)).

** 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)

*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 "3. W/B ADJUST".

- 15 -

LGE Internal Use Only

Color Cool 11,000k°K X=0.276 (±0.002) LG5000

Temperature Y=0.283 (±0.002)

Inner pattern

Medium 9,300k

K X=0.285 (±0.002)

(216gray,85IRE)

Y=0.293 (±0.002)

Warm 6,500k

K X=0.313 (±0.002)

Y=0.329 (±0.002)

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- 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.

4.2 DPM operation confirmation (Only Apply for MNT Model)

• 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

4.3 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.

4.4. 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

4.5. 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).

- 16 -

LGE Internal Use Only

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- 17 -

LGE Internal Use Only

4.5 EDID DATA

Note) Because downloading can be down at the power on

mode only, if it is not set, press the Power ON key of the remote controller to proceed.

O HDMI1 EDID (DDC (Display Data Channel) Data

O HDMI2 EDID (DDC (Display Data Channel) Data

O HDMI3 EDID (DDC (Display Data Channel) Data

O Analog (RGB) EDID table

0123456789ABCDEF

000FFFFFFFFFFFF001E6D010001010101 10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30 60 58 1F 64 11 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 8A

0123456789ABCDEF

0020318F1478405030220221023150750 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

0123456789ABCDEF

0020318F1478405030220221023150750 10 67 03 0C 00 30 00 98 25 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 2F

0123456789ABCDEF

000FFFFFFFFFFFF001E6D010001010101 10 00 11 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 C4 8E 21 00 00 1A 02 3A 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30 60 58 1F 64 11 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 F6

0123456789ABCDEF

0 0203 04000E1F008051 001E3040803700 10 C4 8E 21 00 00 1C F1 27 00 A0 51 00 25 30 50 80 20 37 00 C4 8E 21 00 00 1C 26 36 80 A0 70 38 1F 40 30 30 20 25 00 C4 8E 21 00 00 0A 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 BC

0123456789ABCDEF

0020318F1478405030220221023150750 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

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- 18 -

LGE Internal Use Only

5. Adjusting the White Balance

5.1 Overview

- Purpose and principle for adjusting the white balance

- Purpose : Adjust the white balance to reduce the deviation of the module.

- Principle: The full dynamic range of the module when the RGB gain on the OSD is 192. In order to adjust the white balance with no saturation of the full dynamic range and the data, fix one of the RGB gains to 192 and decrease the remaining two gains to adjust

5.2 Device to use

1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12)

2) Computer to adjust (needed for the automatic adjustment,

possible to communicate with the RS-232C)

3) Adjustment remote controller

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 Measuring instrument wiring diagram

5.4 RS-232C Command used for the automatic

adjustment

- "wb 00 00": Start Auto-adjustment of white balance.

- "wb 00 10": Start Gain Adjustment (Inner pattern)

- "jb 00 c0" :

- …

- "wb 00 1f": End of Adjustment

* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-

end)

- "wb 00 ff": End of white balance adjustment (inner pattern disappear)

6. How to adjust

6.1 How to adjust automatically

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.

6.2 How to adjust manually

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 basically used, 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

- PDP: Locate the Color Analyzer (CA-100, CA-100+, CA210) close to the module surface to measure and adjust

- LCD: 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.

- Keep the white pattern with the inner pattern for the PDP.

- For the LCD, make sure that the back light is turned on by

using no signal and the full white pattern or others.

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)

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- 19 -

LGE Internal Use Only

6.3 Reference (White Balance adjustment coordinate and

White balance)

O Brightness: Full white 216 Gray

O Standard color coordinate and white balance when using the

CS-1000

O Standard color coordinate and white balance when using the

CA-210 (CH 10)

7. Select the option by country

7.1 Overview

- The option selection is applied to the North American model

only, which selects the rating related country.

- Applied models: LA84A 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

8. 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.

9. GND and resisting pressure test

9.1 How to test

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

pressure

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

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

- 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.

- Connect the D-terminal AV JACK tester

- Turn on the automatic (GWS103-4)

- Perform the GND TEST

- If it is not good, the buzzer is operated to notify the test result to the operator.

- 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)

- Perform the resisting pressure test

- If it is not good, the buzzer is operated to notify the test result to the operator.

- If it is OK, the GOOD LAMP is turned and the stopper is moves down, and it moves to the next process.

9.2 Items to manage

O TEST voltage

- GND:1.5KV/min at 100mA

- SIGNAL:3KV/min at 100mA

O TEST time:1 second O TEST POINT

- GND TEST = between POWER CORD GND and SIGNAL CABLE METAL GND

- Resisting pressure TEST = between POWER CORD GND and LIVE & NEUTRAL

O LEAKAGE CURRENT: Set to 0.5mArms

Color temperature

Color Coordination

Temp

xy COOL 0.276 0.283 11000K 0.0000 MEDIUM 0.285 0.293 9300K 0.0000 WARM 0.313 0.324 6500K 0.0000

Color temperature

Test Equipment

Color Coordination

xy COOL CA-210 0.276±0.002 0.283±0.002 MEDIUM CA-210 0.285±0.002 0.293±0.002 WARM CA-210 0.313±0.002 0.329±0.002

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- 20 -

LGE Internal Use Only

10. ISP Download (option)

10.1 Overview

The Micom upgrade via the external port for the service for the customer.

10.2 Device to use

1) PC

2) B/D for the interface (IIC & ISP)

3) Jig for downloading (for the power supply)

10.3 Adjustment wiring diagram (Download device configuration diagram)

10.4 Adjustment condition (Download condition)

- IC name & Circuit number: MYSON MTV416GMF & IC4015

- Power supply: 5V (P4004 Pin 3)

- SCL: D-sub Pin 10

- SDA: D-sub Pin 7

10.5 How to adjust (for downloading)

1) fter executing LGE Monitor Tools v1.1, click the first icon.

(See the figure)

2) When the screen is displayed as shown at the below

figure, set the items as follows:

- MCU Select: MTV512M64

- R/W Option: Auto Write(Verify)

- Jig Option: Myson

- Transmit Speed: Medium

- Check: blank

- PORT: Select the Parallel Port to use (LPT1 in general)

*caution: Select the EPP as LPT from the ROM BIAS setting.

3) Click the Load File Button, and select the desired Hex File to download.

(If no file is displayed, make sure that the file format is selected as Hex file (*.hex))

4) Click 'Send Button'

Main B/D

Interface B/D

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- 21 -

LGE Internal Use Only

11. USB S/W Download (option)

11.1 Overview

The USB download is for the quick service response via the S/W upgrade and for applying the S/W upgrade necessary for the board adjustment

11.2 How to dowunload

1) After turning on the set, make sure that the display screen is turned on.

2) When the USB Memory Stick with the upgrade file applied is inserted into the USB jack on the main board, the following screen (example) is displayed after several seconds

3) Check the current version at [Current TV Software Version Information], check the S/W version to upgrade at [New Found TV Software Version Information], and press the Enter button of the TV remote controller.

4) Downloading is proceeded as shown at the below screen, and when it is ended, turning on/off is automatically done.

(When the automatic proceeding is not smoothly done, manually perform the power On/Off).

5) When downloading is ended, remove the USB Memory Stick from the USB jack.

6) Press the IN-START button of the remote controller to check the upgraded S/W version.

TV Software Upgrade

[ Current TV Software Version Information ] HOMEFS(RELEASE): 00.01.01 [ New Found TV Software Version Information ] MODEL : 42PX3D-UE FILE : homefs-42PX3D-UE-RELEASE-0x0102.pak HOMEFS(RELEASE) : 00.01.02 Press ENTER to start downloading the new software. Until the whole process if completed, please

- Do not remove the memory card from the slot.

- Do not plug off. Press EXIT to cancel the upgrade.

TV Software Upgrade

The software upgrade is now in progress. Until the whole process if completed, please

- Do not remove the memory card from the slot.

- Do not plug off. Reading the file°¶Done Upgrading°¶Done

The TV will restart automatically in 0 seconds.

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LGE Internal Use Only

- 22 -

TROUBLESHOOTING

TV/CATV doesnt display

Check TU500 Pin15(Video output),

Pin16(Sound output)

Can you see the normal signal?

Check the output of TR(Q503).

Can you see the normal waveform?

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

Could you measure voltage of

TU800 & IIC lines?

Are they all normal?

YES

You should check power line

& IIC lines.

YES

You should replace TUNER.

You should decide to replace TR(Q503)

or not.

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

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LGE Internal Use Only

- 23 -

DTV doesnt display

Check the output data of TU800

Pin 24~34

Can you see the normal signal?

Could you measure voltage of

TU800 & IIC lines?

Are they all normal?

You should check power line

& IIC lines.

YES

You should replace TUNER.

YES

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

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LGE Internal Use Only

- 24 -

AV1/2/3 doesnt display

Check J600,J600,JK607,JK618

Can you see the normal

waveform?

Check the input of Video

switch(IC700).

Can you see the normal waveform?

YES

J600,J601 or SIDE AV may have

problem. Replace this Jack or SIDE

AV.

After checking the Power of AV switch

you should decide to replace AV switch

or not.

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

YES

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LGE Internal Use Only

- 25 -

Component doesnt display

Check J701.

Can you see the normal

waveform?

Check the input of Component

Audio switch(IC1001) ,

Can you see the normal waveform?

Check the output of Component

Audio switch(IC1001) ,

Can you see the normal waveform?

YES

J701

may have problem. Replace this Jack.

After checking the Power of component

Audio switch, you should decide to

replace component Audio switch or not.

After checking the Power of component

Audio switch you should decide to

replace component Audio switch or not.

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

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LGE Internal Use Only

- 26 -

RGB PC doesnt display

Check J703 ,

Can you see the normal

waveform?

Check the input of RGB Audio

switch(IC1001) ,

Can you see the normal waveform?

Check the output of RGB Audio

switch(IC1001) ,

Can you see the normal waveform?

YES

J703

may have problem. Replace this Jack.

After checking the Power of RGB Audio

switch, you should decide to replace

RGB Audio switch or not.

After checking the Power of RGB Audio

switch you should decide to replace

RGB Audio switch or not.

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

Check the input of RGB Video

switch(IC700) ,

Can you see the normal waveform?

After checking the Power of RGB Video

switch, you should decide to replace

RGB Video switch or not.

YES

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- 27 -

LGE Internal Use Only

HDMI doesnt display

Check input connect J900 , J901,

J902

Can you see the normal

waveform?

Check DDC communication

lines(IC900, IC901, IC903 Pin5,6)

Check the input of HDMI

Seitch(IC902)

This signal is TMDS.

Can you see the normal waveform?

YES

J900 , J901, J902

may have problem. Replace this Jack.

Check the output of HDMI

Switch(IC902).

Can you see the normal waveform?

YES

After checking the trace of TMDS lines and

power of HDMI Switch, you should decide

replace HDMI Switch or not.

After checking the Power of this chip,

you should decide to replace this or not.

After checking the Power of HDMI

Switch you should decide to replace

MST3361 or not.

YES

Check HDCP communication

lines(IC902)

After checking the Power of this chip,

ou should decide to replace this or not.

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

This board has big problem because

Main IC(IC100) have some troubles.

After checking thoroughly all path once

again, You should decide to replace

Main Board or not.

Page 28

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LGE Internal Use Only

- 28 -

BLOCK DIAGRAM

LVDS

SC2_L/R_IN

Saturn3+

STMAV340

(IC700)

NTP3000A

(IC1000)

SP (R)

SP (L)

P1000

5V_ANT_MNT

CI Slot

(P800)

EEPROM

KIA7427

(IC104)

24C512

(IC105)

I2C_D_TU / I2C_A_TU

KEY1/2

TV Tuner

BOOSTER

SIF

TV_CVBS

DDR Memory

256Mb (IC300)

SC1_R/G/B

DSUB_R/G/B

R/G/B

PC_L/R_IN

COMP_Y/Pb/Pr

COMP_L/R_IN

DSUB_H/V_SYNC

MAX3232

(IC702)

DDC/UART-Tx/Rx

HDMI

Switch

(IC902)

EEPROM

HDMI_I2C

HDMI_I2C_0

HDMI_CEC/Rx/HPD

TMDS x3

HPD x3

HDMI_CEC x3

USB_DM/DP

5V_HDMI

PCM_ADD PCM_DATA

TS_Parallel

TU_TS_DATA

KIC7SZ32FU

(IC802)

PCM_CD_ON

CI_CD_1/2

IIS

MUTE

LED_G/R & IR

Flash Memory

4MB (IC101)

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_OUT

LCD Panel

52/47/42/37: FHD

32: : HD

RESET

I2C

I/O Expander

(IC103)

I2C_A_TU

TS_Serial

74LVC541A

(IC800)

Flash Memory

4MB (IC102)

DDR Memory

256Mb (IC300)

EEPROM

Side_Y/C/V/L/R

SPDIF Out

IIC(Eye Q II)

TPA6110A2

(IC1002)

Head phone Out

74HC4066

(IC1001)

Page 29

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LGE Internal Use Only

- 29 -

EXPLODED VIEW

300

510

500

120

121

122

200

800

900

901

801

802

803

804

805

806

550

530

810

521

520

540

820

400

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Page 31

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Page 32

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Page 33

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Apr., 2008

Printed in KoreaP/NO : MFL41333504

LG Electronics 425020, 425010, 425030 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual