LCD TV SERVICE MANUAL - go-gddq. · PDF filelcd tv service manual caution before servicing the chassis, read the safety precautions in this manual. chassis : ld91a model : 32lg2100

LCD TVSERVICE MANUAL

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

CHASSIS : LD91A

MODEL : 32LG2100 32LG2100-ZA

North/Latin America http://aic.lgservice.comEurope/Africa http://eic.lgservice.comAsia/Oceania http://biz.lgservice.com

Printed in KoreaP/NO : MFL50326821 (0904-REV00)

Internal Use Only

LGE Internal Use OnlyCopyright ©2009 LG Electronics. Inc. All right reserved. Only for training and service purposes

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CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ................................................................ 9

EXPLODED VIEW .................................................................................. 14

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

General Guidance

An isolation Transformer should always be used during theservicing of a receiver whose chassis is not isolated from the ACpower line. Use a transformer of adequate power rating as thisprotects the technician from accidents resulting in personal injuryfrom electrical shocks.

It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently 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 exposedmetallic parts of the cabinet, such as antennas, terminals, etc., tobe sure the set is safe to operate without damage of electricalshock.

Leakage Current Cold Check(Antenna Cold Check)With the instrument AC plug removed from AC source, connect anelectrical jumper across the two AC plug prongs. Place the ACswitch in the on position, connect one lead of ohm-meter to the ACplug prongs tied together and touch other ohm-meter lead in turn toeach exposed metallic parts such as antenna terminals, phonejacks, etc. If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver 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 capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using AC voltmeterwith 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat AC voltagemeasurements for each exposed metallic part. Any voltagemeasured must not exceed 0.75 volt RMS which is corresponds to0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument’sexposed METALLIC PARTS

Good Earth Groundsuch as WATER PIPE,CONDUIT etc.

AC Volt-meter

When 25A is impressed between Earth and 2nd Groundfor 1 second, Resistance must be less than 0.1*Base on Adjustment standard

IMPORTANT SAFETY NOTICE

0.15uF

Ω


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CAUTION: Before servicing receivers covered by this servicemanual and its supplements and addenda, read and follow theSAFETY PRECAUTIONS on page 3 of this publication.NOTE: If unforeseen circumstances create conflict between thefollowing servicing precautions and any of the safety precautions onpage 3 of this publication, always follow the safety precautions.Remember: Safety First.

General Servicing Precautions1. 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 polarityinstallation of electrolytic capacitors may result in anexplosion hazard.

2. Test high voltage only by measuring it with an appropriate highvoltage 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 itsassemblies.

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

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

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

7. Always connect the test receiver ground lead to the receiverchassis ground before connecting the test receiver positivelead.Always remove the test receiver ground lead last.

8. Use with this receiver only the test fixtures specified in thisservice manual.CAUTION: Do not connect the test fixture ground strap to anyheat sink in this receiver.

Electrostatically Sensitive (ES) DevicesSome semiconductor (solid-state) devices can be damaged easilyby static electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical ESdevices are integrated circuits and some field-effect transistors andsemiconductor "chip" components. The following techniquesshould be used to help reduce the incidence of componentdamage caused by static by static electricity.1. Immediately before handling any semiconductor component or

semiconductor-equipped assembly, drain off any electrostaticcharge on your body by touching a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed toprevent 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 asaluminum foil, to prevent electrostatic charge buildup orexposure of the assembly.

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

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

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

6. Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to install it.(Most replacement ES devices are packaged with leadselectrically shorted together by conductive foam, aluminum foilor comparable conductive material).

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

8. Minimize bodily motions when handling unpackagedreplacement ES devices. (Otherwise harmless motion such asthe brushing together of your clothes fabric or the lifting of yourfoot from a carpeted floor can generate static electricitysufficient to damage an ES device.)

General Soldering Guidelines1. Use a grounded-tip, low-wattage soldering iron and appropriate

tip size and shape that will maintain tip temperature within therange or 500°F to 600°F.

2. Use an appropriate gauge of RMA resin-core solder composedof 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 wire-

bristle (0.5 inch, or 1.25cm) brush with a metal handle.Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering techniquea. 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 thereonly until the solder flows onto and around both thecomponent lead and the foil.CAUTION: Work quickly to avoid overheating the circuitboard printed foil.

d. Closely inspect the solder area and remove any excess orsplashed solder with a small wire-bristle brush.

SERVICING PRECAUTIONS


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IC Remove/ReplacementSome chassis circuit boards have slotted holes (oblong) throughwhich the IC leads are inserted and then bent flat against thecircuit foil. When holes are the slotted type, the following techniqueshould be used to remove and replace the IC. When working withboards using the familiar round hole, use the standard techniqueas outlined in paragraphs 5 and 6 above.

Removal1. Desolder and straighten each IC lead in one operation by gently

prying up on the lead with the soldering iron tip as the soldermelts.

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

Replacement1. 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 TransistorRemoval/Replacement1. 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" withlong nose pliers to insure metal to metal contact then soldereach connection.

Power Output, Transistor DeviceRemoval/Replacement1. 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/Replacement1. 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 ifnecessary, apply additional solder.

Fuse and Conventional ResistorRemoval/Replacement1. 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 replacedcomponent and adjacent components and the circuit board toprevent excessive component temperatures.

Circuit Board Foil RepairExcessive heat applied to the copper foil of any printed circuitboard will weaken the adhesive that bonds the foil to the circuitboard causing the foil to separate from or "lift-off" the board. Thefollowing guidelines and procedures should be followed wheneverthis condition is encountered.

At IC ConnectionsTo repair a defective copper pattern at IC connections use thefollowing procedure to install a jumper wire on the copper patternside of the circuit board. (Use this technique only on ICconnections).

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

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

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

4. Route the jumper wire along the path of the out-away copperpattern and let it overlap the previously scraped end of the goodcopper pattern. Solder the overlapped area and clip off anyexcess jumper wire.

At Other ConnectionsUse the following technique to repair the defective copper patternat connections other than IC Pins. This technique involves theinstallation of a jumper wire on the component side of the circuitboard.

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

2. Trace along the copper pattern from both sides of the patternbreak and locate the nearest component that is directlyconnected to the affected copper pattern.

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


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

4. Electrical specification- Module General Specification

1. Application rangeThis specification is applied to the LCD TV used LD91Achassis.

2. Requirement for TestEach part is tested as below without special appointment.

1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC2) Relative Humidity : 65±10%3) Power Voltage : Standard input voltage (100-240V@50/60Hz)

* Standard Voltage of each products is marked by models.4) Specification and performance of each parts are followed

each drawing and specif ication by part number inaccordance with BOM.

5) The receiver must be operated for about 5 minutes prior tothe adjustment.

3. Test method1) Performance: LGE TV test method followed 2) Demanded other specification

- Safety: CE, IEC/EN60065- EMC:CE, IEC

No Item Specification Remark

1 Screen Device 32” wide color display module LCD

2 Aspect Ratio 16:9

3 LCD Module 32” TFT LCD HD LGD

4 Storage Environment Temp. : -20 ~ 60 deg

Humidity : 10 ~ 90 %

5 Input Voltage AC100-240V~, 50/60Hz

6 Power Consumption Typ : 87.8 LCD(Module) + Backlight(Lamp)

7 Module Size 760.0 (H) x 450.0 (V) x 48.0 (D)

8 Pixel Pitch 0.17025(H) x 0.51075(V)

9 Back Light 12 EEFL

10 Display Colors 1.06Billion(FHD LGD),16.7M (others)

11 Coating 3H, AG

- 7 - LGE Internal Use OnlyCopyright ©2009 LG Electronics. Inc. All right reserved. Only for training and service purposes

5. Chroma& Brightness- Module optical specification

1) Standard Test Condition (The unit has been ‘ON’)2) Stable for approximately 30 minutes in a dark environment at 25±2ºC.3) The values specified are at approximate distance 50Cm from the LCD surface4) Ta=25±2°C, VLCD=12.0V, fV=60Hz, Dclk=74.25MHz VBR_A=1.65V,ExtVBR_B=100%

No. Item Specification Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 178 Degree

2. Luminance Luminance (cd/m2) 400 500

Variation - 1.3 MAX /MIN

3. Contrast Ratio CR 800 1200

4. CIE Color Coordinates White WX 0.279

WY 0.292 Typ

RED Xr 0.639 ±0.03

Yr 0.333

Green Xg 0.292

Yg 0.604

Blue Xb 0.145

Yb 0.064

6. Component Video Input (Y, CB/PB, CR/PR)

NoSpecification

RemarkResolution 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 480p

4. 720x480 31.50 60.00 480p

5. 720x576 15.625 50.00 SDTV,DVD 625 Line

6. 720x576 31.25 50.00 HDTV 576p

7. 1280x720 45.00 50.00 HDTV 720p

8. 1280x720 44.96 59.94 HDTV 720p

9. 1280x720 45.00 60.00 HDTV 720p

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 56.250 50 HDTV 1080p

14. 1920x1080 67.5 60 HDTV 1080p


NoSpecification

Proposed RemarkResolution H-freq(kHz) V-freq(Hz) Pixel Clock(MHz)

1. 720*400 31.468 70.08 28.321 For only DOS mode

2. 640*480 31.469 59.94 25.17 VESA Input 848*480 60Hz, 852*480 60Hz

-> 640*480 60Hz Display

3. 800*600 37.879 60.31 40.00 VESA

4. 1024*768 48.363 60.00 65.00 VESA(XGA)

5. 1280*768 47.78 59.87 79.5 WXGA

6. 1360*768 47.72 59.8 84.75 WXGA

7. 1280*1024 63.595 60.0 108.875 SXGA FHD model

8. 1920*1080 66.587 59.93 138.625 WUXGA FHD model

7. RGB (PC)

8. HDMI Input (PC/DTV)(1) DTV Mode

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

1. 720*400 31.468 70.08 28.321 HDCP

2. 640*480 31.469 59.94 25.17 VESA HDCP

3. 800*600 37.879 60.31 40.00 VESA HDCP

4. 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

5. 1280*768 47.78 59.87 79.5 WXGA HDCP

6. 1360*768 47.72 59.8 84.75 WXGA HDCP

7. 1280*1024 63.595 60.0 108.875 SXGA HDCP/FHD model

8. 1920*1080 67.5 60.00 138.625 WUXGA HDCP/FHD model

(2) PC Mode

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

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

2. 720*576 31.25 50 54 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 26.97 /27 23.97 /24 74.17/74.25 HDTV 1080P

8. 1920*1080 33.716 /33.75 29.976 /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


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ADJUSTMENT INSTRUCTION

1. Application RangeThis specification sheet is applied to all of the LCD TV withLD91A chassis.

2. Designation1) The adjustment is according to the order which is

designated and which must be followed, according to theplan which can be changed only on agreeing.

2) Power Adjustment: Free Voltage3) Magnetic Field Condition: Nil.4) Input signal Unit: Product Specification Standard5) Reserve after operation: Above 5 Minutes (Heat Run)

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

6) Adjustment equipments: Color Analyzer (CA-210 or CA-110), DDC Adjustment Jig equipment, SVC remotecontroller

7) Push The “IN STOP KEY” - For memory initialization.

3. Main PCB check process* APC - After Manual-Insult, executing APC

* Boot file Download1) Execute ISP program “Mstar ISP Utility” and then click

“Config” tab.2) Set as below, and then click “Auto Detect” and check “OK”

messageIf “Error” is displayed, Check connection betweencomputer, jig, and set.

3) Click “Read” tab, and then load download file (XXXX.bin)by clicking “Read”

4) Click “Connect” tab. If “Can’t” is displayed, checkconnection between computer, jig, and set.

5) Click “Auto” tab and set as below6) Click “Run”.7) After downloading, check “OK” message.

* USB DOWNLOAD1) 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, USBdata is automatically detecting

3) Show the message “Copying files from memory”

filexxx.bin

(4)

(7) .OK

(5)

(6)

(1)

fi lexxx.bin

(2) (3)

Please Check the Speed : To use speed between from 200KHz to 400KHz

Case1 : Software version up1. After downloading S/W by USB, TV set will reboot

automatically2. Push “In-stop” key3. Push “Power on” key4. Function inspection5. After function inspection, Push “I n-stop” key.

Case2 : Function check at the assembly line1. When TV set is entering on the assembly line, Push

“In-stop” key at first.2. Push “Power on” key for turning it on.

-> If you push “Power on” key, TV set will recoverchannel information by itself.

3. After function inspection, Push “In-stop” key.

4) Updating is staring.

5) Fishing the version uploading, you have to put USB stickand “AC Power” off.

6) After putting “AC Power” on and check updated version onyour TV.* If downloading version is more high than your TV have,

TV can lost all channel data. In this case, you have tochannel recover. if all channel data is cleared, you didn’thave a DTV/ATV test on production line.

* 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 hax their number)

4) Completed selecting Tool option.

3.1. ADC Process(1) ADC

• Input signal : Component 480i• Signal equipment displays.

- Component 480IMODEL: 209 in Pattern Generator(480i Mode)PATTERN : 65 in Pattern Generator(MSPG-925 SERIES)

• After enter Service Mode by pushing “ADJ” key,• Enter Internal ADC mode by pushing “G” key at “5. ADC

Calibration”

<Caution> Using ‘power on’ button of the Adjustment R/C ,power on TV.

* ADC Calibration Protocol (RS232)

Adjust Sequence• aa 00 00 [Enter Adjust Mode]• xb 00 40 [Component1 Input (480i)]• ad 00 10 [Adjust 480i Comp1]• xb 00 60 [RGB Input (1024*768)]• ad 00 10 [Adjust 1024*768 RGB]• aa 00 90 End Adjust mode* Required equipment : Adjustment R/C.

3.2. Function Check(1) Check display and sound

- Check Input and Signal items. (cf. work instructions)1) TV2) AV (SCART1/SCART2/ CVBS)3) COMPONENT (480i)4) RGB (PC : 1024 x 768 @ 60hz)5) HDMI6) PC Audio In* Display and sound check is executed by remote control.


Module Tool option1 Tool option2 Tool option3 Tool option4

32LG2100 17729 1574 1952 3584

Item CMD1 CMD2 Data0

Adjust A A 0 0 When transfer the ‘Mode In’,

‘Mode In’ Carry the command.

ADC Adjust A D 1 0 Automatically adjustment

(The use of a internal pattern)

Adjustment pattern

4. Total Assembly line process4.1. Adjustment Preparation

· W/B Equipment conditionCA210 : CH 9, Test signal : Inner pattern (85IRE)

· Above 5 minutes H/run in the inner pattern. (“power on” keyof adjust remote control)

* Connecting picture of the measuring instrument(On Automatic control)Inside PATTERN is used when W/B is controlled. Connect toauto controller or push Adjustment R/C POWER ON ->Enter the mode of White-Balance, the pattern will come out.

* Auto-control interface and directions1) Adjust in the place where the influx of light like floodlight

around is blocked. (illumination is less than 10ux).2) Adhere closely the Color Analyzer (CA210) to the module

less than 10cm distance, keep it with the surface of theModule and Color Analyzer’s Prove vertically.(80~100°).

3) Aging time- After aging start, keep the power on (no suspension of

power supply) and heat-run over 5minutes.- Using ‘no signal’ or ‘full white pattern’ or the others,

check the back light on.

• Auto adjustment Map(RS-232C)RS-232C COMMAND[CMD ID DATA]

Wb 00 00 White Balance StartWb 00 ff White Balance End

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

* Manual W/B process using adjusts Remote control.• After enter Service Mode by pushing “ADJ” key,• Enter White Balance by pushing “G” key at “6. White

Balance”.

* After done all adjustments, Press “In-start” button andcompare Tool option and Area option value with its BOM, ifit is correctly same then unplug the AC cable. If it is notsame, then correct it same with BOM and unplug AC cable.For correct it to the model’s module from factory JIG model.

* Push The “IN STOP KEY” after completing the functioninspection.

4.2. 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.* For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

4.3. 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.* For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

4.4. EDID DATA1) All Data : HEXA Value2) Changeable Data :*: Serial No : Controlled / Data:01**: Month : Controlled / Data:00***:Year : Controlled****:Check sum


Cool 11,000k ºK X=0.276(±0.002)

Y=0.283(±0.002) <Test Signal>

Medium 9,300k ºK X=0.285(±0.002) Inner pattern

Y=0.293(±0.002) (216gray,85IRE)

Warm 6,500k ºK X=0.313(±0.002)

Y=0.329(±0.002)

Full White Pattern

COLORANALYZERTYPE: CA-210

RS-232C Communication

CA-210

RS-232C COMMAND MIN CENTER MAX

[CMD ID DATA] (DEFAULT)

Cool Mid Warm Cool Mid Warm

R Gain jg Ja jd 00 172 192 192 255

G Gain jh Jb je 00 172 192 192 255

B Gain ji Jc jf 00 192 192 172 255

R Cut 64 64 64 128

G Cut 64 64 64 128

B Cut 64 64 64 128

- Auto Download• After enter Service Mode by pushing “ADJ” key,• Enter EDID D/L mode.• Enter “START” by pushing “OK” key.

* Edid data and Model option download (RS232)

- Manual Download* Caution

1) Use the proper signal cable for EDID Download- Analog EDID : Pin3 exists- Digital EDID : Pin3 exists

2) Never connect HDMI & D-sub Cable at the same time.3) Use the proper cables below for EDID Writing4) Download HDMI1, HDMI2, separately because HDMI1 is

different from HDMI3

1) HD RGB EDID data

2) HD HDMI EDID data

* Detail EDID Options are below Product ID

Serial No: Controlled on production line.

Month, Year: Controlled on production line:ex) Monthly : ‘02’ -> ‘02’

Year : ‘2009’ -> ‘13’ Model Name(Hex):

Checksum: Changeable by total EDID data.

Vendor Specific(HDMI)

Model Name HEX EDID Table DDC Function

FHD Model 0001 01 00 Analog/Digital

HD Model 0000 00 00 Analog/Digital


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MODEL MODEL NAME(HEX)

all 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20

Item CMD1 CMD2 Data0

Download A A 0 0 When transfer the ‘Mode In’,

‘Mode In’ Carry the command.

Download A E 00 10 Automatically Download

(The use of a internal pattern)

Item

Manufacturer ID

Version

Revision

Condition

GSM

Digital : 1

Digital : 3

Data(Hex)

1E6D

01

03

D-sub to D-sub DVI-D to HDMI or HDMI to HDMI

For HDMI EDIDFor Analog EDID

0 1 2 3 4 5 6 7 8 9 A B C D E F00 00 F F F F F F F F F F F F 00 1E 6D a b10 c 01 03 80 73 41 78 0A C F 74 A3 57 4C B0 2320 09 48 4C A1 08 00 81 C0 61 40 45 40 31 40 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 2050 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 3A60 3E 1F 46 10 00 0A 20 20 20 20 20 20 d70 d 01 e80 02 03 20 F1 4E 10 1F 84 13 05 14 03 02 12 20 2190 22 15 01 26 15 07 50 09 57 07 fA 0 f 80 18 71 1C 16 20 58 2C 25 00 7E 8A 42 00B0 00 9E 01 1D 00 80 51 D0 0C 20 40 80 35 00 7E 8AC0 42 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00D0 7E 8A 42 00 00 18 02 3A 80 18 71 38 2D 40 58 2CE0 45 00 7E 8A 42 00 00 1E 01 1D 80 D0 72 1C 16 20F0 10 2C 25 80 7E 8A 42 00 00 9E 00 00 00 00 00 D5

0 1 2 3 4 5 6 7 8 9 A B C D E F00 00 F F F F F F F F F F F F 00 1E 6D a b10 c 01 03 68 73 41 78 0A C F 74 A3 57 4C B0 2320 09 48 4C A1 08 00 81 C0 61 40 45 40 31 40 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 2050 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 3A60 3E 1F 46 10 00 0A 20 20 20 20 20 20 d70 d 00 e80 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F90 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FA 0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FB0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FC0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FD0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FE0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FF0 F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F

INPUT MODEL NAME(HEX)

HDMI1 67030C001000011D

HDMI2 67030C002000011D

HDMI3 67030C003000011D


4.5. Outgoing condition Configuration- When pressing IN-STOP key by SVC remocon, Red LED are

blinked alternatively. And then Automatically turn off.(Must not AC power OFF during blinking)

4.6. Internal pressureConfirm whether is normal or not when between powerboard’s ac block and GND is impacted on 1.5kV(dc) or2.2kV(dc) for one second

5. Model name & Serial number D/L• 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).

5.1. Signal TABLE

CMD : A0hLENGTH : 85~94h (1~16 bytes)ADH : EEPROM Sub Address high (00~1F)ADL : EEPROM Sub Address low (00~FF)Data : Write dataCS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_nDelay : 20ms

5.2. Command Set

* DescriptionFOS Default write : <7mode data> writeVtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,PhaseData write : Model Name and Serial Number write in

EEPROM,.

5.3. Method & notice1) Serial number D/L is using of scan equipment.2) Setting of scan equipment operated by Manufacturing

Technology Group.3) Serial number D/L must be conformed when it is produced

in production line, because serial number D/L is mandatoryby D-book 4.0.

* Manual Download (Model Name and Serial Number)If the TV set is downloaded by OTA or Service man, Sometimesmodel name or serial number is initialized.(Not always)There is impossible to download by bar code scan, so It needManual download.1) Press the ‘instart’ key of ADJ remote controller.2) Go to the menu ‘5.Model Number D/L’ like below photo.3) Input the Factory model name(ex 42LH4000-ZA) or Serial

number like photo.

4) Check the model name Instart menu -> Factory namedisplayed (ex 42LH4000-ZA)

5) Check the Diagnostics (DTV country only) ->s Buyer modeldisplayed (ex 42LH4000)

CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY

No. Adjust mode CMD(hex) LENGTH(hex) Description

1 EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16)

- 14 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved. Only for training and service purposes

300

200

200T

200N

120 12

2

400

500

510

521

530

540

550

801

805

802

804

803

800

821

900

910

LV1

A2

A10

A9

EXPLODED VIEW

Many electrical and mechanical parts in this chassis have special safety-related characteristics. Theseparts 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 asrecommended 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

THE

S

YMBO

L M

ARK

OF

THIS

SCH

EMET

IC D

IAG

RAM

INCO

RPO

RATE

SSP

ECIA

L FE

ATUR

ES IM

PORT

ANT

FOR

PRO

TECT

ION

FRO

M X

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IATI

ON.

FILR

E AN

D EL

ECTR

ICAL

SHO

CK H

AZAR

DS, W

HEN

SERV

ICIN

G IF

IS

ESSE

NTIA

L TH

AT O

NLY

MAN

UFAT

URES

SPE

CFIE

D PA

RTS

BE U

SED

FOR

THE

CRIT

ICAL

CO

MPO

NENT

S IN

THE

SYM

BOL

MAR

K O

F TH

E SC

HEM

ETIC

.

PC

M_

A[0

]

PC

M_

A[1

]

PC

M_

A[2

]

PC

M_

A[3

]

PC

M_

A[4

]

PC

M_

A[5

]

PC

M_

A[6

]

PC

M_

A[7

]

PC

M_

A[7

]

PC

M_

A[6

]

PC

M_

A[5

]

PC

M_

A[4

]

PC

M_

A[0

]

PC

M_

A[1

]

PC

M_

A[3

]

PC

M_

A[2

]

PC

M_

A[8

]

PC

M_

A[9

]

PC

M_

A[1

0]

PC

M_

A[1

2]

PC

M_

A[1

3]

PC

M_

A[1

1]

PC

M_

A[1

4]

PC

M_

D[0

]

PC

M_

D[1

]

PC

M_

D[2

]

PC

M_

D[3

]

PC

M_

D[4

]

PC

M_

D[5

]

PC

M_

D[6

]

PC

M_

D[7

]

CI_

TS

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AT

A[0

]

CI_

TS

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AT

A[1

]

CI_

TS

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AT

A[3

]

CI_

TS

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AT

A[2

]

CI_

TS

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AT

A[5

]

CI_

TS

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AT

A[4

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CI_

TS

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AT

A[7

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CI_

TS

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A[6

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ISP

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PR

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27

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26

NC

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7

27

NC

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8

28

NC

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9

29

I/O

0

30

I/O

1

31

I/O

2

32

I/O

3

33

NC

_2

0

34

NC

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1

35

NC

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2

36

VS

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2

37

VC

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2

38

PR

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39

NC

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3

40

NC

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4

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I/O

4

42

I/O

5

43

I/O

6

44

I/O

7

45

NC

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5

46

NC

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6

47

NC

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7

48

NC

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8

17

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15

NC

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NC

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NC

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NC

_7

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NC

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NC

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NC

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WP

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PC

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SIG

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KR

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UN

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SD

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Flash_WP_1

R1

74

0

R1

75

0

R1

02

0

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R1

97

15

KO

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R1

96

15

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72

0

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2

22

AR

10

3

22

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PC

M_

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SP

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SP

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SP

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SP

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PC

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PC

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IOR

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M_

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CD

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M_

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M_

IRQ

A

PC

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5V

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TL

5:D

24

CI_

TS

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AT

A[0

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IR

11

:X1

6;1

1:A

D1

4

+3

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SID

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RR

5:V

21

BU

F_

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5:V

22

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F_

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LK

5:V

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BU

F_

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AT

A[0

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2

CI_

TS

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5:D

10

CI_

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YN

5:D

10

CI_

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AL

5:D

10

US

B_

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4

PW

M1

C1040.1uF

C1

06

0.1

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C1

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R1

51

33

3

R1

51

43

3

R1

51

53

3

R1

51

63

3

R1

51

03

3

R1

51

73

3

R1

51

13

3

R1

51

83

3

R1

51

23

3

R1

51

93

3

R1121K

OPT

R1051K OPT

R103

10K

R10410K

R1113.9K

R1

52

43

3

R1

52

53

3

R1

52

63

3

R1

53

0

33

R15334.7K

+3

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PR

OM

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DA

E1

6;E

20

;T1

9

R15391K

R15401K

L102

EE

PR

OM

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CL

E1

6;T

19

;Y1

3

IC1

07

CA

T2

4W

C0

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2

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1

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SS

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0

5S

DA

6S

CL

7W

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CC

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DA

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EE

PR

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CL

E1

9;T

19

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SC

AR

T2

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INV

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TL

8:M

10

Fla

sh

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P_

1A

11

SC

L1

T2

2

SD

A1

T2

2

PA

NE

L_

CT

L8

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RM

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N/L

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1

DB

G_

RX

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R_

ON

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:P5

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B_

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D4

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3

SD

A_

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B/A

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7:F

12

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10

SD

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12

R1

23

0F

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D_

SD

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12

SC

L_

SU

B/A

MP

7:F

13

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9

R1

28

0

R1

22

0

R1

29

0

EE

PR

OM

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DA

E1

6;E

20

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4

SD

A0

T2

1;Y

14

SC

L0

T2

1;Y

14

R124

4.7K

FE

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OD

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CL

10

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2

EE

PR

OM

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CL

E1

6;E

19

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3

R125

4.7K

SC

L1

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12

+3

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SC

AR

T1

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EE

PR

OM

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CL

E1

6;E

19

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9

ISP

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CO

MP

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DS

UB

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AV

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VB

S_

DE

T4

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R1

51

0

R1

50

90

OP

T

R1

31

0F

RC

/LV

DS

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ME

MC

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CL

11

:Q8

ME

MC

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DA

11

:J8

R1

30

0F

RC

/LV

DS

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SD

A0

T2

1;Y

14

SC

L0

T2

1;Y

14

5V

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DM

I_2

5V

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DM

I_1

X1

00

12

MH

z

SB

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UT

E7

:G2

5;7

:R1

5;9

:AI2

4;9

:AI2

5

ISP

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+3

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T

R1

15

10

K

IC1

01

KIA

74

27

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2

GN

D3O

UT

1V

CC

C1

01

0.0

22

uF

16

VR107470

SID

E_

US

B_

DM

4:A

J6

R1

32

15

KO

PT

R1

33

15

KO

PT

R1

79

0

R1

78

0

SID

E_

US

B_

DP

4:A

J5

OP

C_

EN

11

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0

PW

M0

PW

M1

IC1

05

M2

45

12

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W6

3E

2

2E

1

4V

SS

1E

0

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DA

6S

CL

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C

8V

CC

DB

G_

TX

DB

G_

RX

ED

ID_

WP

9:A

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LV

DS

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10

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4

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C1

05

10

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6.3

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ON

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T_

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R1

89

0

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L_

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0

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3

R1

26

0

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TL

10

:AA

4

+5

V_

GE

NE

RA

L

R15044.7K

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UN

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CL

AI1

3;1

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9

R15054.7K

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9

C1

11

20

pF

C1

12

20

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R15071.2K

R15061.2K

R1

55

01

00

PO

WE

R_

DE

T

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T

R1

54

41

00

PW

M0

PW

M2

PW

M_

DIM

A_

DIM

C1

50

01

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50

12

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PT

+2

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R1

46

0

R1

16

0

R1

73

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R1

68

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R1

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50

10

0

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R1

56

10

0

R1

47

10

0

R1

57

10

0

R1

66

10

0

R1

48

10

0

R1

60

10

0

R1

54

10

0

R1

83

10

0

R1

53

10

0

R1

90

10

0

R1

77

10

0

R1

91

10

0

R1

88

10

0

R1

27

10

0

R1

84

10

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18

51

00

R1

59

10

0

R1

86

10

0

R1

67

10

0

R1

53

41

00

V4

R1

82

10

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PT

R1

52

31

00

R1

87

10

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PT

R1

52

01

00

R1

55

10

0

R1

92

10

0

R1

60

11

00

R1

60

01

00

FR

C/L

VD

S_

B

R1

54

31

0K

R195

10K

R1

98

1K

R1

50

01

K OP

T

R1

99

1K

OP

T

R1

50

11

K

R1

61

22

R1

71

22

R1

40

22

R1

41

22

R1

42

22

R1

43

22

R1

53

72

2

R1

53

82

2

R1

69

22

R1

70

22

R1

58

4.7

K

R1

52

4.7

KO

PT

R1

52

1

3.6

K

19

~3

2

R1

52

71

K1

%

26

~3

2

R1

52

82

.7K

1%

37

~4

7

R1

52

91

.8K

37

~4

7

C1

02

10

uF

6.3

V

R15022.2K

R15032.2K

R1

61

11

00

R1

60

33

.3K

FH

D

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LGE Internal Use Only

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HDMISCART_RGB DSUB CVBS TV/MNTCOMP

AUDIO INLVDS OUT

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2.9

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SD

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SD

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SD

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TD

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TD

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[11

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TD

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TD

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TD

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TD

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TD

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TD

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SD

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SD

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]

TD

DR

_D

[11

]

TD

DR

_D

[15

]

TD

DR

_D

[10

]

TD

DR

_D

[14

]

TD

DR

_D

[13

]

TD

DR

_D

[12

]

TD

DR

_D

[0]

TD

DR

_D

[2]

TD

DR

_D

[5]

TD

DR

_D

[13

]

TD

DR

_D

[0]

TD

DR

_D

[7]

TD

DR

_D

[9]

TD

DR

_D

[6]

TD

DR

_D

[15

]

TD

DR

_D

[14

]

TD

DR

_D

[4]

SD

DR

_B

A[0

]

SD

DR

_B

A[1

]

AD

DR

2_

BA

[2]

/AD

DR

2_

MC

LK

SD

DR

_C

KE

AD

DR

2_

CK

E

/SD

DR

_C

K

SD

DR

_C

K

/SD

DR

_R

AS

/SD

DR

_C

AS

/SD

DR

_W

E

SD

DR

_D

QS

1_

P

SD

DR

_D

QS

0_

P

SD

DR

_D

QM

1_

P

SD

DR

_D

QM

0_

P

SD

DR

_D

QS

1_

N

SD

DR

_D

QS

0_

N

/AD

DR

2_

RA

S

AD

DR

2_

OD

T

/AD

DR

2_

CA

S

/AD

DR

2_

WE

AD

DR

2_

DQ

S1

_P

AD

DR

2_

DQ

S0

_P

AD

DR

2_

DQ

M1

_P

AD

DR

2_

DQ

M0

_P

AD

DR

2_

DQ

S0

_N

AD

DR

2_

DQ

S1

_N

BD

DR

2_

DQ

M0

_P

BD

DR

2_

DQ

S1

_P

BD

DR

2_

OD

T

BD

DR

2_

DQ

S0

_N

TD

DR

_C

KE

TD

DR

_M

CL

K

BD

DR

2_

DQ

S0

_P

BD

DR

2_

MC

LK

/TD

DR

_M

CL

K

TD

DR

_D

QM

1_

P

BD

DR

2_

DQ

S1

_N

BD

DR

2_

DQ

M1

_P

/TD

DR

_C

AS

BD

DR

2_

BA

[2]

TD

DR

_B

A[1

]

/TD

DR

_W

E

TD

DR

_D

QS

1_

P

TD

DR

_B

A[0

]

TD

DR

_D

QS

1_

N

TD

DR

_D

QS

0_

P

BD

DR

2_

BA

[0]

/TD

DR

_R

AS

BD

DR

2_

BA

[1]

TD

DR

_D

QM

0_

P

/BD

DR

2_

MC

LK

TD

DR

_D

QS

0_

N

SD

DR

_A

[3]

SDDR_A[0-12]

ADDR2_A[0-12]

AD

DR

2_

A[0

]

AD

DR

2_

A[1

]

AD

DR

2_

A[3

]

AD

DR

2_

A[2

]

AD

DR

2_

A[5

]

AD

DR

2_

A[7

]

AD

DR

2_

A[6

]

AD

DR

2_

A[4

]

AD

DR

2_

A[9

]

AD

DR

2_

A[8

]

AD

DR

2_

A[1

0]

AD

DR

2_

A[1

1]

AD

DR

2_

A[1

2]

AD

DR

2_

A[3

]

AD

DR

2_

A[1

]

AD

DR

2_

A[1

0]

AD

DR

2_

A[9

]

AD

DR

2_

A[1

2]

AD

DR

2_

A[7

]

AD

DR

2_

A[0

]

AD

DR

2_

A[2

]

AD

DR

2_

A[4

]

AD

DR

2_

A[6

]

AD

DR

2_

A[1

1]

AD

DR

2_

A[8

]

AD

DR

2_

BA

[0]

AD

DR

2_

BA

[1]

AD

DR

2_

MC

LK

BDDR2_A[0-12]

BD

DR

2_

A[0

]

BD

DR

2_

A[1

]

BD

DR

2_

A[2

]

BD

DR

2_

A[3

]

BD

DR

2_

A[4

]

BD

DR

2_

A[5

]

BD

DR

2_

A[6

]

BD

DR

2_

A[7

]

BD

DR

2_

A[8

]

BD

DR

2_

A[9

]

BD

DR

2_

A[1

0]

BD

DR

2_

A[1

1]

BD

DR

2_

A[1

2]

BD

DR

2_

A[9

]

BD

DR

2_

A[3

]

BD

DR

2_

A[1

]

BD

DR

2_

A[1

0]

BD

DR

2_

A[5

]

BD

DR

2_

A[1

2]

BD

DR

2_

A[0

]

BD

DR

2_

A[2

]

BD

DR

2_

A[4

]

BD

DR

2_

A[6

]

BD

DR

2_

A[1

1]

BD

DR

2_

A[8

]

BD

DR

2_

CK

E

/BD

DR

2_

RA

S

/BD

DR

2_

CA

S

/BD

DR

2_

WE

ADDR2_D[0-15]

AD

DR

2_

D[0

]

AD

DR

2_

D[1

]

AD

DR

2_

D[3

]

AD

DR

2_

D[2

]

AD

DR

2_

D[5

]

AD

DR

2_

D[4

]

AD

DR

2_

D[6

]

AD

DR

2_

D[7

]

AD

DR

2_

D[1

2]

AD

DR

2_

D[9

]

AD

DR

2_

D[8

]

AD

DR

2_

D[1

4]

AD

DR

2_

D[1

0]

AD

DR

2_

D[1

5]

AD

DR

2_

D[1

1]

AD

DR

2_

D[1

3]

AD

DR

2_

D[1

1]

AD

DR

2_

D[1

2]

AD

DR

2_

D[4

]

AD

DR

2_

D[3

]

AD

DR

2_

D[1

]

AD

DR

2_

D[6

]

AD

DR

2_

D[9

]

AD

DR

2_

D[1

4]

AD

DR

2_

D[1

5]

AD

DR

2_

D[1

3]

AD

DR

2_

D[1

0]

AD

DR

2_

D[8

]

AD

DR

2_

D[5

]

AD

DR

2_

D[7

]

AD

DR

2_

D[2

]

AD

DR

2_

D[0

]

SDDR_D[0-15]

BDDR2_D[0-15]

BD

DR

2_

D[0

]

BD

DR

2_

D[1

]

BD

DR

2_

D[2

]

BD

DR

2_

D[3

]

BD

DR

2_

D[6

]

BD

DR

2_

D[4

]

BD

DR

2_

D[7

]

BD

DR

2_

D[5

]

BD

DR

2_

D[1

0]

BD

DR

2_

D[8

]

BD

DR

2_

D[1

2]

BD

DR

2_

D[1

4]

BD

DR

2_

D[1

5]

BD

DR

2_

D[1

1]

BD

DR

2_

D[9

]

BD

DR

2_

D[1

3]

BD

DR

2_

D[1

1]

BD

DR

2_

D[1

2]

BD

DR

2_

D[1

4]

BD

DR

2_

D[9

]

BD

DR

2_

D[1

3]

BD

DR

2_

D[1

0]

BD

DR

2_

D[8

]

BD

DR

2_

D[1

5]

BD

DR

2_

D[4

]

BD

DR

2_

D[3

]

BD

DR

2_

D[1

]

BD

DR

2_

D[6

]

BD

DR

2_

D[7

]

BD

DR

2_

D[5

]

BD

DR

2_

D[0

]

BD

DR

2_

D[2

]

TDDR_D[0-15]

SD

DR

_A

[9]

SD

DR

_A

[5]

AD

DR

2_

A[5

]

BD

DR

2_

A[7

]T

DD

R_

A[7

]

SD

DR

_O

DT

TD

DR

_B

A[2

]S

DD

R_

BA

[2]

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

AR

30

0

56

AR

30

1

56

AR

30

2

56

AR

30

3

56

AR

30

5

56

AR

30

4

56

AR

30

6

56

AR

30

8

56

AR

30

7 56

AR

30

9 56

AR

31

0

56

AR

31

2 56

AR

31

1

56

AR

31

3

56

R3

06

22

R3

07

22

R300150

OPT

R344150

OPT

R3

31

22

R3

30

22

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

+1

.8V

_D

DR

C324

10uF

C303

10uF

IC3

01

H5

PS

51

62

FF

R-S

6C

J2

VR

EF

J8

CK

H2

VS

SQ

2

B7

UD

QS

N8

A4

P8

A8

L1

NC

4

L2

BA

0

R8

NC

3

K7

RA

S

F8

VS

SQ

3

F3

LD

M

P3

A9

M3

A1

N3

A5

K8

CK

R3

NC

5

L3

BA

1

J7

VS

SD

L

L7

CA

S

F2

VS

SQ

4

B3

UD

M

M2

A1

0/A

P

K2

CK

E

R7

NC

6

M7

A2

N7

A6

M8

A0

J1

VD

DL

K3

WE

E8

LD

QS

P7

A1

1

K9

OD

T

A2

NC

1

N2

A3

P2

A7

H8

VS

SQ

1

F7

LD

QS

A8

UD

QS

R2

A1

2

L8

CS

E2

NC

2

E7

VS

SQ

5D

8V

SS

Q6

D2

VS

SQ

7A

7V

SS

Q8

B8

VS

SQ

9B

2V

SS

Q1

0

P9

VS

S1

N1

VS

S2

J3

VS

S3

E3

VS

S4

A3

VS

S5

G9

VD

DQ

1G

7V

DD

Q2

G3

VD

DQ

3G

1V

DD

Q4

E9

VD

DQ

5C

9V

DD

Q6

C7

VD

DQ

7C

3V

DD

Q8

C1

VD

DQ

9A

9V

DD

Q1

0

R1

VD

D1

M9

VD

D2

J9

VD

D3

E1

VD

D4

A1

VD

D5

B9

DQ

15

B1

DQ

14

D9

DQ

13

D1

DQ

12

D3

DQ

11

D7

DQ

10

C2

DQ

9C

8D

Q8

F9

DQ

7F

1D

Q6

H9

DQ

5H

1D

Q4

H3

DQ

3H

7D

Q2

G2

DQ

1G

8D

Q0

IC3

00

HY

5P

S1

G1

63

1C

FP

-S6

J2

VR

EF

J8

CK

H2

VS

SQ

2

B7

UD

QS

N8

A4

P8

A8

L1

BA

2

L2

BA

0

R8

NC

3

K7

RA

S

F8

VS

SQ

3

F3

LD

M

P3

A9

M3

A1

N3

A5

K8

CK

R3

NC

5

L3

BA

1

J7

VS

SD

L

L7

CA

S

F2

VS

SQ

4

B3

UD

M

M2

A1

0/A

P

K2

CK

E

R7

NC

6

M7

A2

N7

A6

M8

A0

J1

VD

DL

K3

WE

E8

LD

QS

P7

A1

1

K9

OD

T

A2

NC

1

N2

A3

P2

A7

H8

VS

SQ

1

F7

LD

QS

A8

UD

QS

R2

A1

2

L8

CS

E2

NC

2

E7

VS

SQ

5D

8V

SS

Q6

D2

VS

SQ

7A

7V

SS

Q8

B8

VS

SQ

9B

2V

SS

Q1

0

P9

VS

S1

N1

VS

S2

J3

VS

S3

E3

VS

S4

A3

VS

S5

G9

VD

DQ

1G

7V

DD

Q2

G3

VD

DQ

3G

1V

DD

Q4

E9

VD

DQ

5C

9V

DD

Q6

C7

VD

DQ

7C

3V

DD

Q8

C1

VD

DQ

9A

9V

DD

Q1

0

R1

VD

D1

M9

VD

D2

J9

VD

D3

E1

VD

D4

A1

VD

D5

B9

DQ

15

B1

DQ

14

D9

DQ

13

D1

DQ

12

D3

DQ

11

D7

DQ

10

C2

DQ

9C

8D

Q8

F9

DQ

7F

1D

Q6

H9

DQ

5H

1D

Q4

H3

DQ

3H

7D

Q2

G2

DQ

1G

8D

Q0

R351

0

R350

0

OPT

C306

0.1uF

C337

0.1uF

C320

0.1uF

C326

0.1uF

C340

0.1uF

C338

0.1uF

C331

0.1uF

C329

0.1uF

C334

0.1uFC336

0.1uF

C341

0.1uF

C327

0.1uF

C319

0.1uF

C310

0.1uF

C342

0.1uF

C316

0.1uF

C3

23

0.1

uF

C330

0.1uF

C305

0.1uF

C317

0.1uF

C332

0.1uF

C314

0.1uF

C3

02

0.1

uF

C339

0.1uF

C308

0.1uF

C318

0.1uF

C307

0.1uF

C304

0.1uF

C328

0.1uF

C315

0.1uF

C313

0.1uF

C312

0.1uF

C325

0.1uF

C3

33

0.1

uF

C3010.1uF

C3000.1uF

C3

35

0.1

uF

C311

0.1uF

C3090.1uF

R3451K

1%

R3431K

1%

R321

1K1%

R322

1K1%

R301

1K1% R3021K1%

R3

48

4.7

KO

PT

R3

47

4.7

KO

PT

R3

46

4.7

KO

PT

R3

49

4.7

KO

PT

R3

36

56

R3

20

56

R3

19

56

R3

17

56

R3

15

56

R3

10

56

R3

34

56

R3

13

56

R3

33

56

R3

18

56

R3

27

56

R3

08

56

R3

09

56

R3

39

56

R3

11

56

R3

40

56

R3

12

56

R3

32

56

R3

29

56

OP

TR

30

55

6

R3

03

56

R3

41

56

R3

14

56

R3

38

56

R3

04

56

R3

25

56

R3

37

56

R3

35

56

R3

26

56

R3

42

56

R3

28

56

R3

16

56

IC1

00

LG

E3

36

8A

(S

atu

rn6

No

-Div

X)

B_

DD

R2

_A

0T

26

B_

DD

R2

_A

1A

F2

6

B_

DD

R2

_A

2T

25

B_

DD

R2

_A

3A

F2

3

B_

DD

R2

_A

4T

24

B_

DD

R2

_A

5A

E2

3

B_

DD

R2

_A

6R

26

B_

DD

R2

_A

7A

D2

2

B_

DD

R2

_A

8R

25

B_

DD

R2

_A

9A

C2

2

B_

DD

R2

_A

10

AD

23

B_

DD

R2

_A

11

R2

4

B_

DD

R2

_A

12

AE

22

B_

DD

R2

_B

A0

AC

23

B_

DD

R2

_B

A1

AC

24

B_

DD

R2

_B

A2

AB

22

B_

DD

R2

_M

CL

KV

25

/B_

DD

R2

_M

CL

KV

24

B_

DD

R2

_C

KE

AB

23

B_

DD

R2

_O

DT

U2

6

/B_

DD

R2

_R

AS

U2

5

/B_

DD

R2

_C

AS

U2

4

/B_

DD

R2

_W

EA

B2

4

B_

DD

R2

_D

QS

0A

B2

6

B_

DD

R2

_D

QS

1A

A2

6

B_

DD

R2

_D

QM

0A

C2

5

B_

DD

R2

_D

QM

1A

C2

6

B_

DD

R2

_D

QS

B0

AB

25

B_

DD

R2

_D

QS

B1

AA

25

B_

DD

R2

_D

Q0

W2

5

B_

DD

R2

_D

Q1

AE

26

B_

DD

R2

_D

Q2

W2

4

B_

DD

R2

_D

Q3

AF

24

B_

DD

R2

_D

Q4

AF

25

B_

DD

R2

_D

Q5

V2

6

B_

DD

R2

_D

Q6

AE

25

B_

DD

R2

_D

Q7

W2

6

B_

DD

R2

_D

Q8

Y2

6

B_

DD

R2

_D

Q9

AD

25

B_

DD

R2

_D

Q1

0Y

25

B_

DD

R2

_D

Q1

1A

E2

4

B_

DD

R2

_D

Q1

2A

D2

6

B_

DD

R2

_D

Q1

3Y

24

B_

DD

R2

_D

Q1

4A

D2

4

B_

DD

R2

_D

Q1

5A

A2

4

A_

MV

RE

FD

15

A_

DD

R2

_A

0C

13

A_

DD

R2

_A

1A

22

A_

DD

R2

_A

2B

13

A_

DD

R2

_A

3C

22

A_

DD

R2

_A

4A

13

A_

DD

R2

_A

5A

23

A_

DD

R2

_A

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pF

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pF

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C7

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pF

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C7

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pF

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44

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pF

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70

5

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R7

24

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29

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R7

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10

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64

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1

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2V

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ET

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LK

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ND

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LF

M

12

AV

DD

_P

LL

13

DV

DD

_P

LL

14

TE

ST

0

15 DVSS_2

16 DVDD

17 SDATA

18 WCK

19 BCK

20 SDA

21 SCL

22 MONITOR_0

23 MONITOR_1

24 MONITOR_2

25 FAULT

26 VDR2B

27 BST2B

28 PGND2B_1

29

PG

ND

2B

_2

30

OU

T2

B_

13

1O

UT

2B

_2

32

PV

DD

2B

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PV

DD

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PV

DD

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PV

DD

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T2

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38

PG

ND

2A

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39

PG

ND

2A

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40

BS

T2

A4

1V

DR

2A

42

NC

43VDR1B44BST1B45PGND1B_146PGND1B_247OUT1B_148OUT1B_249PVDD1B_150PVDD1B_251PVDD1A_152PVDD1A_253OUT1A_154OUT1A_255PGND1A_156PGND1A_2

C7

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AK

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5C

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6C

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G-E

S

7C

-LU

G-E

R

8B

RE

AK

[R]

9T

RA

NS

FE

R[R

]

10

FIX

-TE

R

L7

09

12

0-o

hm

L7

06

12

0-o

hm

L7

08

12

0-o

hm

L7

07

12

0-o

hm

C7

27

0.1

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C7

13

0.

1u

F1

6V

C7

24

0.

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6V

C7

30

0.

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6V

C7

00

1u

F1

0V

C7

04

1u

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60

1u

F1

0V

R7

18

10

0

C7

21

0.1

uF

16

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0.1

uF

C7

20

50

V

SPEA

KER_

L

SPEA

KER_

R

EA

RP

HO

NE

AM

P

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=>

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MC

LK

SD

AT

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CK

BC

K T

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s n

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ry

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nit

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_2

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sso

ry



AMP

Block Diagram Block Diagram

RGB

COMPONENT

F-SCART

AV3

BUF_TS_CLK/ERR/SYN/DATA[0]

AV_CVBS_IN

DDR2 SDRAM(1Gb)IC300

NAND FlashHYNIXIC102

USB

Digital amp(NTP3100L)

IC701

COMP_Y/Pb/Pr

SC1_CVBS_IN

SC2_CVBS_IN

I2S

DSUB_ R/G/B

Tu

ner

(TD

FW-G

23

5D

1)

TU

10

00

LCD Panel

- 19/22/26/32/37/42LH2000- 32/37/42/47LH3000- 32/37/42/47LH4000

74LVC541ABufferIC502

CI S

lot

(P5

00

)

74LCX244BufferIC501

PCM_A[0:7]

FE_VMAIN

PCM_A[0:7]

SDDR_D[0:15]

DDR2 SDRAM(512Mb)IC301

TDDR_D[0:15]

SDDR_A[0:12]Mstar S6LGE3368A

(No-DVIX)

(IC100)

MP6211DHUSB Power

IC402

USB Power

FE_TS_DATA[0:7] CI_MDI[0:7]

H-SCART

SC1_R/G/B

SC1/2_L/R_IN,FE_AM_AUDIO,AV_L/R_IN,COMP_L/R_IN, PC_L/R_IN

FE_ VOUT

DTV/MNT_VOUTTDDR_A[0:12]

TPA6110AIC700

Head Phone

RS-232CMAX3232CDR

IC403SPDIF SPDIF_OUT

DSUB_H/VSYNC

HP_L/ROUT

L/R

CI_TS_DATA[0:7]

PCM_D[0:7] CI_DATA[0:7]

CI_ADDR[0:7]

AUDIO IN

DGB_TX/RX HPD1/2/3, HDMI_CEC

TMDS[0:7] ( Data, Clock (+/-))

USB_DM/DP

EEPROMAT24C512(IC105)

EEPROMAT24C512

(HDCP)IC107

I2C

LVDS (10 bit)

Serial FlashIC104

For Triton

Serial FlashIC103

For Boot

KIA7027(IC101)

Voltage Detector

74LX1G14C(IC108)

Schmitt Trigger

Reset

5V_HDMI_1/2/3 HDMI1/2/3

Block diagram Main Block

37 GIP Block Diagram37 GIP Block Diagram

TCON with FRCMST7327N

IC101

M+S T-Con Block

SPI_CZ/CK & DI/DO

DDR_A_D[0:15]DDR2 SDRAM

(512MB / 533MHz)HYNIXIC201

DDR_B_D[16:31]

DDR_A_A[0:12]

DDR_B_A[0:12]

Serial FlashW25X32VSSIG

IC102

DDR2 SDRAM(512MB / 533MHz)

HYNIXIC202

Multi Channel DC/DC Converter

TPS 65161IC401

P-Gamma IC BUF16821

IC402

VCC

VDD

VGH

VGL

VCC VDD

Level ShifterMAX17108

IC403

GVST

GVDD_EVEN

GVDD_ODD

GCLK1~6

VGHVGLVGHVDD

SOE

POL

Left mini-LVDS (8Bit)

Right mini-LVDS (8Bit)

LVDS (10Bit)

FRC IIC

FRC Reset

VCOM

GAMMA

FRC_3.3V

FRC_1.8V

FRC_1.26V

DC/DC ConverterBD9130IC301

LDOSC4215IC303

FRC_1.8V

FRC_1.26VFRC_3.3VVCCLVD

S (1

0Bit)

From MainBoard

FRC

IIC

FRC

Res

et

Panel 12V

To Left LCD Panel To Right LCD Panel

VST

VDD_EVEN

VDD_ODD

CLK1~6

Shifted level(HIGH=VGH/Low=VGL)

VCC

VDD

VGH

VGL

VST

VDD

_EVE

N

VDD

_OD

D

CLK1

~6

SOE

POL VC

OM

GAM

MA

VCC

VDD

VGH

VGL

VST

VDD

_EVE

N

VDD

_OD

D

CLK1

~6

SOE

POL VC

OM

GAM

MA

LVDS Wafer P 10 1

mini-LVDS Wafer P 40 1

Only for 37LH4000

Block diagram*M+S : Main B/D + T-con B/D

In different

42/47 Normal Block Diagram42/47 Normal Block Diagram

TCON with FRCMST7327N

IC101 SPI_CZ/CK & DI/DO

DDR_A_D[0:15]DDR2 SDRAM

(512MB / 533MHz)HYNIXIC201

DDR_B_D[16:31]

DDR_A_A[0:12]

DDR_B_A[0:12]

Serial FlashW25X32VSSIG

IC102

DDR2 SDRAM(512MB / 533MHz)

HYNIXIC202

Multi Channel DC/DC Converter

TPS 65162IC401

P-Gamma IC BUF16821

IC402

VCC

VDD

VGL

VCC VDD

GSP

GSC

GO

E

SOE

POL

VCOM

GAMMA

DC/DC ConverterBD9130IC301

LDOSC4215IC303

FRC_1.8V

FRC_1.26VFRC_3.3VVCC

VGHM

Left mini-LVDS (8Bit)

Right mini-LVDS(8Bit)

LVDS (10Bit)

FRC IIC

FRC Reset

FRC_3.3V

FRC_1.8V

FRC_1.26V

LVDS Wafer P 10 1

LVD

S (1

0Bit)

FRC

IIC

FRC

Res

et

Panel 12V

mini-LVDS Wafer P 40 1

To Left LCD Panel To Right LCD Panel

VCC

VDD

VGH

M

VGL

GSP

GSC

GO

E

SOE

POL

VCO

M

GAM

MA

VCC

VDD

VGH

M

VGL

GSP

GSC

GO

E

SOE

POL

VCO

M

GAM

MA

From MainBoard

Only for 42/47LH4000

Block diagram M+S T-Con Block

*M+S : Main B/D + T-con B/D

Contents of LCD TV Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

A. Video error

No video/Normal audio 1

2 No video/No audio 2

3 Video error, video lag/stop 3

4 Color error 4

5Vertical/Horizontal bar, residual image,light spot, external device color error

5

6

B. Power error

No power 6

7Off when on, off while viewing, power autoon/off

7

8C. Audio error

No audio/Normal video 8

9 Wrecked audio/discontinuation/noise 9

10D. Function error

No response in remote controller, key error,recording error, memory error

10

11 External device recognition error 11

12 E. Noise Circuit noise, mechanical noise 12

13 F. Exterior error Exterior defect 13

First of all, Check whether there is SVC Bulletin in GCSC System for these model.

Normal audio

Y

N

Move to Novideo/No audio

No videoNormal audio

Check Back LightOn with naked eye

OnY

N

Check PowerBoard12v,5v etc.

Normal voltage

Y

N

Replace Main Board

Replace T-conBoard or moduleAnd Adjust VCOM

OR

Repair PowerBoard or parts

Check Power Board 20V /12V or 24v output

Normalvoltage

YReplace Inverteror module

N

Repair PowerBoard or parts

End

Always check & record S/W Version and WhiteBalance value before replacing the Main Board Replace Main Board Re-enter White Balance value

Precaution

Establisheddate

Standard Repair Process

Revised date

2008. 3 .05

1/13LCD TV

Errorsymptom

A. Video error

No video/ Normal audio

First of all, Check whether all of cables between board is inserted properly or not.(Main B/D Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

1

Normal voltage?

Check variousvoltages of PowerBoard ( 5V,12V,20Vor 24V…)

No Video/No audio

Check andreplaceMAIN B/D

Y

Replace PowerBoard and repairparts

N End


A. Video error

No video/ No audio

Establisheddate

Revised date

2008. 3 .05

2/13LCD TV

Errorsymptom

2

A. Picture Problem

Picture broken/ Freezing

Y

N

N

Check RF Signal level

Normal Signal?

Check RF CableConnection

1. Reconnection2. Install Booster

CheckS/W Version

Booster menuOn Off: CheckOff On: Check

S/W Upgrade

Check whether other equipments have problem or not. (By connecting RF Cable at other equipment)

DVD Player ,Set-Top-Box, Different maker TV etc`

SVC Bulletin?

ReplaceMain B/D

CheckTuner soldering

Normal Picture?

Y

N

Y

Close

Normal Picture?

YClose

Menu Setup Booster

. By using Digital signal level meter

. By using Diagnostics menu on OSD ( Menu Setup Diagnostic) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)

Normal Picture?

Y

Contact with signal distributor or broadcaster (Cable or Air)

N N

Normal Picture?

Y

Close

N


Establisheddate

Revised date

2008. 3 .05

3/13LCD TV

Errorsymptom

3

Colorerror?

Y

N

Checkand replaceLink Cable(LVDS) andcontactcondition

Y

N

Replace Main B/DColorerror?

Check errorcolor inputmode

Check color by input-External Input-COMPONENT-RGB-HDMI/DVI

YExternal device/Cablenormal

External Input/Component

error

Checkexternaldevice andcable

YExternal device/Cablenormal

RGB/HDMI/DVI

error

Check externaldevice andcable

Replace Main B/D

Replace Main B/D

N

N

A. Video error

Color error

N

Y

End

Replace module

Request repairfor externaldevice/cable

Replace T-Con BoardAnd AdjustVCOM N

Y

Colorerror?

LGD ModuleOnly

Other Module

Colorerror?

Check Test pattern


Establisheddate

Revised date

2008. 3 .05

4/13LCD TV

Errorsymptom

4

Screennormal?

N

YCheck externaldeviceconnectioncondition

Y

N

Check andreplace LinkCable

Normal?

Y

NScreennormal?

Replace Main B/D

Replacemodule

Check color condition by input-External Input-Component-RGB-HDMI/DVI

End

Vertical/Horizontal bar, residual image, light spot

Request repairfor externaldevice

A. Video error

Vertical / Horizontal bar, residual image, light spot, external device color error

External device screen error-Color error

External Inputerror

Connect other externaldevice and cable(Check normal operation ofExternal Input, Component,RGB and HDMI/DVI byconnecting Jig, patternGenerator ,Set-top Box etc.

N

Y

ReplaceMain B/D

Screennormal?

Check screencondition byinput-External Input-Component-RGB-HDMI/DVI

Request repair forexternal device

Componenterror

RGBerror

HDMI/DVI

Connect other externaldevice and cable(Check normal operation ofExternal Input, Component,RGB and HDMI/DVI byconnecting Jig, patternGenerator ,Set-top Box etc.

Replace Main B/D

Screennormal?

N

Y

Check S/W Version

Y

NCheck version

S/W Upgrade

Y

NNormalscreen?

End

Y

N

Replace T-Con BoardAnd Adjust VCOM

LGD Module Only

ReplaceModule

Other Module

Replace modulein abnormal displayingafter exchanging T-Con B'd

Screennormal?

End

Establisheddate

Revised date

2008. 3 .05

5/13LCD TV

Errorsymptom


Check Test pattern

5

B. Power error

No power

Power LEDOn?

Y

N

DC Power onby pressing Power KeyOn Remote control

Y

NNormal operation?

Check PowerOn ‘”High”

Check Power cordwas inserted properly

CheckPower LED

ReplacePowerB/D

Measure voltage of each output of Power B/D

N

YNormalvoltage?

Replace Main B/D

N

YOK?

Replace Main B/D

N

Y

Normal? Check ST-BY 5V

Replace Power B/D

N

YNormal

voltage?

Replace PowerB/D

Y


Establisheddate

Revised date

2008. 3 .05

6/13LCD TV

Errorsymptom

’09 years new model apply mechanical power switch to reduce power consumption in stand-by status. If mechanical power switch off Doesn’t turn on by remote control Doesn’t appear LED light Please refer to the A21 Page

6

. Stand-By: Red

. Operating: Green

Check & RepairMechanical Power switch

on Local control of TV

Close

B. Power error

Off when on, off while viewing, power auto on/off

Error?N

Y

Check Power OffMode

Fix A/C code & Outletand describe 3 wavelength

Check A/C code

Check for 3 wave length

Check outlet

Replace Main B/DCPUAbnormal

(If Power Off modeis not displayed)Check Power B/Dvoltage

Y

N

Replace Main B/DNormal

voltage?

Replace Power B/D

Replace Power B/D

N

YNormal? End

Caution Check and fix exterior of Power B/D Part

Establisheddate

Revised date

2008. 3 .05

7/13LCD TV

Errorsymptom


7

Status Power off List Explanation

Normal

"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL"POWEROFF_OFFTIMER" Power off by OFF TIMER"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER"POWEROFF_INSTOP" Power off by INSTOP KEY"POWEROFF_AUTOOFF" Power off by AUTO OFF"POWEROFF_ONTIMER" Power off by ON TIMER"POWEROFF_RS232C" Power off by RS232C"POWEROFF_RESREC" Power off by Reservated Record"POWEROFF_RECEND" Power off by End of Recording"POWEROFF_SWDOWN" Power off by S/W Download"POWEROFF_UNKNOWN" Power off by unknown status except listed case

Abnormal"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

* Please refer to the all cases which can be displayed on power off mode.

Abnormal 1

No audioScreen normal

Check usermenu >Speaker off

OffN

Y

Cancel OFF and describe

Check audio B+20V or 24V ofPower Board

Normalvoltage

Y

N

Replace Power Board and repair parts

CheckSpeakerdisconnection

N

Y

Replace Speaker

Replace MAIN Board End

C. Audio error

No audio/ Normal video

Disconnection

Establisheddate

Revised date

2008. 3 .05

8/13LCD TV

Errorsymptom


8

Wrecked audio/discontinuation/noise is same after “Check input signal” compared to No audio

C. Audio error

Wrecked audio/ discontinuation/noise

Wrecked audio/Discontinuation/

Noise for all audio

Check and replacespeaker andconnector


Noise only for D-TV


Noise only for Analog


Noise only for External Input

Connect and checkother externaldevice

N

Y

Normalaudio?

Check and fix external device

Replace Power B/D

N

Y

Normalvoltage?

Check inputsignal-RF-External Inputsignal

Signal normal?

(When RF signal is notreceived)Request repair to externalcable/ANT provider

Y

Check audio B+ Voltage (20V or 24V)

Replace Main B/D

(In case ofExternal Inputsignal error)Check and fixexternal device

Replace Main B/DN

End

Establisheddate

Revised date

2008. 3 .05

9/13LCD TV

Errorsymptom


9

D. General Function Problem

Remote control & Local switch checking

Y

N

1. Remote control (R/C) operating error

Move Power problem

Section

2. Local(Mechanical) switch operating error

Check R/C itselfOperation

Normaloperating?

Normaloperating?

Y

Close

Replace R/C

If R/C operate,Explain the customercause is interferencefrom light in room.

Check R/C OperatingWhen turn off light

in room

Check & ReplaceBaterry of R/C

Check & RepairCable connectionConnector solder

Normaloperating?

Check B+ 5VOn Main B/D

NormalVoltage?

Close

N

N

Check 5v on Power B/DReplace Power B/D or

Replace Main B/D(Power B/D don’t have problem)

Check IROutput signal

NormalSignal?

N

Y

Repair/ReplaceIR B/D

N

ReplaceMain B/D

Y

Y

N

Check R/COperation

Normaloperating?

Y

Check & RepairCable connectionConnector solder

Normaloperating?

Close

N Check & ReplaceAssembly status(Key PCB + tool )

Check KeyOutput signal

Y

Normaloperating?

Close

N NormalSignal?

Repair/ReplaceLocal switch B/D

N

ReplaceMain B/D

Y


Establisheddate

Revised date

2008. 3 .05

10/13LCD TV

Errorsymptom

10

Check technicalinformation- Fix information- S/W Version

N

Y

Technical information?

Checkinputsignal

Signalinput?

Y

N

External Input andComponent

Recognition error

Check and fix external device/cable

RGB,HDMI/DVI, Optical

Recognition error

Replace Main B/D

Replace Main B/DFix inaccordance

with technicalinformation

D. Function error

External device recognition error

Establisheddate

Revised date

2008. 3 .05

11/13LCD TV

Errorsymptom


11

Checklocation ofnoise

Identifynosetype

Circuit noise

Replace inverter

Replace LIPS B/D

Mechanical noise

Check locationof noise

OR

When the nose is severe, replace the module(For models with fix information, upgrade theS/W or provide the description)

OR

If there is a “Tak Tak” noise from thecabinet, refer to the KMS fix information andthen proceed as shown in the solution manual(For models without any fix information,provide the description)

OR

Mechanical noise is a naturalphenomenon, and apply the 1st leveldescription. When the customer does notagree, apply the process by stage.

Describe the basis of the descriptionin “Part related to nose” in the Owner’sManual.

E. Noise

Circuit noise, mechanical noise

<With Inverter Module>

<Without Inverter Module>

Establisheddate

Revised date

2008. 3 .05

12/13LCD TV

Errorsymptom


12

Replace moduleZoom part withexterior damage

Moduledamage

Cabinetdamage Replace cabinet

Replace remote controller

Remote controllerdamage

Standdent Replace stand

F. Exterior defect

Exterior defect

Adjust VCOM

Establisheddate

Revised date

2008. 3 .05

13/13LCD TV

Errorsymptom


13

LCD TV Repair Process Index

- Trouble shooting by input block (Component level check)

No. Symptom (L) Input Block Page Remark

1 Power Problem Power-up Boot fail 1~2

2

Video Problem

No OSD 3~4

3 Digital TV 5

4 Analog TV 6

5 AV (Scart / CVBS/ S-Video) 7~12

6 Component 13

7 RGB(D-SUB) 14~15

8 HDMI 16~17

9

Audio Problem

All Input 18

10 Digital TV 19

11 Analog TV 20

12 AV / Component / RGB, HDMI-PC/ HDMI-DTV 21~26

13AV Audio out / No Audio (Headphone &SPDIF)

27~30

14 USB / Remocon Problem USB no connect / Remocon 31~33

15 Intelligent Sensor Intelligent Sensor 34

P800 Pin #7~#10Voltage Level = 5V ?

P800 Pin #2Voltage level = 5V ?

Check Power connectorOK ?

Replace Power Board

YES

NO YES

P800 Pin #13, 14 = 12V P800 Pin #17, 18 = 24V ?

NO

Replace Power Board

YES

NO

Replace MAIN B’D Q801

MAIN B’D L803 = 3.3V ? Replace MAIN B’D IC801

YES

NO


YES

NO


YES

NO

Check MAIN B’D X100 Clock12MHz Replace MAIN B’D IC100

YES

NO

Replace MAIN B’D IC102NAND FLASH

YES

Replace MAIN B’D IC103Serial FlashNO

Replace MAIN B’D IC300, IC301 DDR2 MemoryNO

Replace MAIN B’D IC100NO

Making

Revision

2009. 2 . 1

1/34 LCD TV Symptom Power-Up Boot Fail

26~42LH200032~47LH3000/LH4000

Check Power connectorOK ?

Replace Power BoardNO YES

Replace Power BoardNO





Replace MAIN B’D IC103Serial FlashNO

Replace MAIN B’D IC300, IC301 DDR2 MemoryNO


Making

Revision

2009. 2 . 1 LCD TV Symptom Power-Up Boot Fail

19~22LH2000

2/34

P801 Pin #5~#6Voltage Level = 5V ?

YES

P801 Pin #1, 2 = 15V?

MAIN B’D L803 = 3.3V ?

YES

MAIN B’D L813 = 1.26V ?

YES

MAIN B’D L805 = 3.3V ?

YES

Check MAIN B’D X100 Clock12MHz

YES

Replace MAIN B’D IC102NAND FLASH

YES

P800 Pin #20Voltage level = 2V

Check Power connectorOK ? Replace Power Board

YESNO YES

NOYES


MAIN B’D L1300 = 12V ? Replace MAIN B’D Q806NO

Replace Main Board

YES

P800 Pin #13, 14 = 12V P800 Pin #17, 18 = 24V ?

Check LVDS CableOK ?

YES

Replace LVDS Cable

NO

Making

Revision

2009. 2 . 1 LCD TV Symptom No OSD

26~42LH200032~47LH3000/LH4000

3/34

P801 Pin #9Voltage level = 2V

Check Power connectorOK ? Replace Power Board

YESNO YES

NOYES


MAIN B’D L1300 = 12V ? Replace MAIN B’D Q806NO

Replace Main Board

YES

P801 Pin #1, 2 = 15V?

Check LVDS CableOK ? YES

Replace LVDS Cable

NO

Making

Revision

2009. 2 . 1 LCD TV Symptom No OSD

19~22LH2000

4/34

Check RF Cable

MAIN B’D L1201 = 5V ?

YES

MAIN B’D L1202 = 3.3V ?

NO

Replace MAIN B’D IC809

YES

NO


MAIN B’D IC804Pin #2 = 1.2V ? Replace MAIN B’D IC804

YES

NO

YES

MAIN B’D R1210 Clock ?NO

Replace MAIN B’D TU1200

Making

Revision

2009. 2 . 1 LCD TV Symptom Digital TV Video Problem

26~42LH200032~47LH3000/LH4000

5/34

Making

Revision

2009. 2 . 1 LCD TV Symptom Analog TV Video Problem

Check RF Cable

MAIN B’D L1201 = 5V ?

YES

MAIN B’D L1202 = 3.3V ?

NO


YES

NO


MAIN B’D IC804Pin #2 = 1.2V ? Replace MAIN B’D IC804

YES

NO

YES

MAIN B’D R1210 Clock ?NO

Replace MAIN B’D TU1200

26~42LH200032~47LH3000/LH4000

6/34

Check Signal formatIs it supported?

Check the SCART Cable

YES

MAIN B’D JK1100 Check Replace MAIN B’D JK1100

YES

NOCheck MAIN B’D R1117

Video Signal ? NO

YES

Check MAIN B’D C210Video Signal ?

ReplaceMAIN B’D C210

NO

Replace MAIN B’D IC 100

YES

Making

Revision

2009. 2 . 1 LCD TV Symptom AV1(Scart CVBS) No Video Problem

26~42LH200032~47LH3000/LH4000

7/34



YES

Check MAIN B’D JK1100 Replace MAIN B’D JK1100

YES

NO

YES

Check MAIN B’D C200 (RED)C201 (GREEN)C202 (BLUE)Video Signal ?

ReplaceMAIN B’D C200, C201, C202NO


YES

Making

Revision

2009. 2 . 1 LCD TV Symptom AV1(Scart RGB) No VideoProblem

26~42LH200032~47LH3000/LH4000

8/34



YES


YES

NOCheck MAIN B’D R1133

Video Signal ? NO

YES

Check MAIN B’D C211Video Signal ? Replace MAIN B’D C211

NO


YES

Making

Revision

2009. 2 . 1 LCD TV Symptom AV2 No Video Problem

26~42LH200032~47LH3000/LH4000

9/34


Check the CVBS Cable

YES


YES

NO

Check MAIN B’D R400Video Signal ?

NOYES

Check MAIN B’D C217Video Signal ? Replace MAIN B’D C217

NO


YES

Making

Revision

2009. 2 . 1 LCD TV Symptom AV3(CVBS) No Video Problem

26~42LH200032~47LH3000/LH4000

10/34

Check Spec (Refer to User Manual)Is it supported?


YES

Check the Trouble Shooting GuideAnalog TV No video

YES


NO


YES


NO

MAIN B’D JK1100 CheckYES

Making

Revision

2009. 2 . 1

11/34 LCD TV Symptom AV1 No Video Out Problem

26~42LH200032~47LH3000/LH4000

Check Spec (Refer to User Manual)Is it supported?


YES

YES


NO

MAIN B’D JK1101 CheckYES


Making

Revision

2009. 2 . 1

12/34 LCD TV Symptom AV2 No Video Out Problem

26~42LH200032~47LH3000/LH4000


Check the Component Cable

YES


YES

NO


NO

YES

Check MAIN B’D C209, C215 (Y)C216 (Pb)C214 (Pr)

Video Signal ?

ReplaceMAIN B’D C209 or C214 or C215 or C216

NO


YES

Making

Revision

2009. 2 . 1

13/34 LCD TV Symptom Component No Video/

No Color Problem

26~42LH200032~47LH3000/LH4000


Check the RGB Cable

YES

MAIN B’D P400 Check Replace MAIN B’D P400

YES

NONO

YES

Check MAIN B’D C208 (Video)R246 (HSYNC)R245 (VSYNC)

ReplaceMAIN B’D C208 or R246 or R247NO


YES

MAIN B’D P400 Pin #2Video signal ?

R437 has Vsync ?R440 has Hsync ?

Making

Revision

2009. 2 . 1

14/34 LCD TV Symptom RGB No Video Problem

26~42LH200032~47LH3000/LH4000


Check the RGB Cable

YES

MAIN B’D P400 Check Replace MAIN B’D P400

YES

NONO

YES

Check MAIN B’D C212 (RED)C207 (GREEN)C213 (BLUE)

Video Signal ?

ReplaceMAIN B’D C212 or C207 or C213NO


YES

MAIN B’D P400 Pin #3 (BLUE)

Pin #2 (GREEN)Pin #1 (RED)Video signal ?

Making

Revision

2009. 2 . 1

15/34 LCD TV Symptom RGB No Color Problem

26~42LH200032~47LH3000/LH4000


Check the HDMI Cable

YES

YES


Check the ADJUST MENUEDID OK ?

YES

Download EDID(Refer to Adjustment Spec)

NO

NO

ReplaceMAIN B’D IC107 (HDCP KEY)

Making

Revision

2009. 2 . 1

16/34 LCD TV Symptom HDMI 1~3 All No Video Problem

HDMI1 – ALL MODELSHDMI2 – Except for 19/22LH20**HDMI3 – Except for 19/22LU40**, 19/22LU50**, 19/22LH20**

26~42LH200032~47LH3000/LH4000


Check the HDMI Cable

YES

YES


MAIN B’D JACK CheckJK600 -> HDMI1JK601 -> HDMI2JK602 -> HDMI3

YES

_ This case is that HDMI Video doesn’t display at the some HDMI input, not all.

Making

Revision

2009. 2 . 1

17/34 LCD TV Symptom HDMI1 or 2 or 3 No Video

Problem

HDMI1 – ALL MODELSHDMI2 – Except for 19/22LH20**HDMI3 – Except for 19/22LU40**, 19/22LU50**, 19/22LH20**

26~42LH200032~47LH3000/LH4000

Check The Speaker

Check Speaker Cable

YES

Check P700 Cable

YES

NO


YES

MAIN B’DL705 Pin #1L704 Pin #2PWM Signal ?

Replace SpeakerNO

Replace Speaker CableNO

CHECK MAIN B’D JK700 or JK701

YES

Replace MAIN B’D JK700 or JK701

NO_ If headphone is connected, Speaker sound doesn’t work.


YES

MAIN B’DL700 = 1.8V

MAIN B’DCheck R720, R721, R722

Signal

YES



Making

Revision

2009. 2 . 1

18/34 LCD TV Symptom All Source no Audio Problem

26~42LH200032~47LH3000/LH4000

Digital TV Video OK ?

YES


Making

Revision

2009. 2 . 1

19/34 LCD TV Symptom Digital TV No Audio Problem

26~42LH200032~47LH3000/LH4000

MAIN B’D TU1200Pin #17 Signal (SIF) Replace MAIN B’D TU1200

NO

Analog TV Video OK ?

YES

Check MAIN B’DC231 Signal (SIF)

NO

Replace MAIN B’D IC100YES

Making

Revision

2009. 2 . 1

20/34 LCD TV Symptom Analog TV No Audio Problem

26~42LH200032~47LH3000/LH4000


YES

Check MAIN B’DC229, C230

MAIN B’DC229 (Right Sound)C230 (Left Sound)

signal ? YES

NO


AV1 Video OK ?

YES

Check MAIN B’D JK1100 Replace MAIN B’D JK1100NO

YES

Making

Revision

2009. 2 . 1

21/34 LCD TV Symptom AV1 No Audio Problem

26~42LH200032~47LH3000/LH4000


YES



signal ? YES

NO


AV2 Video OK ?

YES


YES

Making

Revision

2009. 2 . 1


26~42LH200032~47LH3000/LH4000


YES



signal ? YES

NO


AV3 Video OK ?

YES


YES

Making

Revision

2009. 2 . 1


26~42LH200032~47LH3000/LH4000


YES



signal ? YES

NO


Component Video OK ?

YES


YES

Making

Revision

2009. 2 . 1

24/34 LCD TV Symptom Component No Audio Problem

26~42LH200032~47LH3000/LH4000

Check the PC Audio Cable

YES



signal ? YES

NO


RGB Video OK ?

YES


YES

Making

Revision

2009. 2 . 1

25/34 LCD TV Symptom RGB, HDMI-PC No Audio Problem

26~42LH200032~47LH3000/LH4000

HDMI Video OK ?

YES

Check the ADJUST MENUEDID OK ?

YES

Download EDID(Refer to Adjustment Spec)

NO

Check the HDMI Cable Replace MAIN B’D IC100YES

Making

Revision

2009. 2 . 1

26/34 LCD TV Symptom HDMI-DTV No Audio Problem

26~42LH200032~47LH3000/LH4000


YES

Replace MAIN B’DIC1103

MAIN B’DR239 (Right Sound)R240 (Left Sound)

signal ? NO

YES


Analog TV Audio OK

YES


YES

Check the Trouble Shooting GuideAnalog TV No videoNO

Making

Revision

2009. 2 . 1

27/34 LCD TV Symptom AV1 No Audio Out Problem

26~42LH200032~47LH3000/LH4000


YES



signal ? NO

YES


Speaker Audio OK

YES


YES

Check the Trouble Shooting GuideRelated to Audio ProblemNO

Making

Revision

2009. 2 . 1

28/34 LCD TV Symptom AV2 No Audio Out Problem

26~42LH200032~47LH3000/LH4000

Check the Headphone Cable

YES



signal ? NO

YES


Speaker Audio OK

YES

Check MAIN B’D JK700 or JK701 Replace MAIN B’D JK700 or JK701NO

YES


Making

Revision

2009. 2 . 1

29/34 LCD TV Symptom Headphone No Audio Problem

26~42LH200032~47LH3000/LH4000

Check the SPDIF Cable

YES

Check MAIN B’D R230PWM Signal ?


Speaker Audio OK

YES


YES

NO


Making

Revision

2009. 2 . 1

30/34 LCD TV Symptom SPDIF No Audio Problem

26~42LH200032~47LH3000/LH4000

Check MAIN B’DJK405 Pin #1 5V ?

NO

Check MAIN B’DR848 12V ?

Check that the USB Memory & HDD are supported by Spec(Refer to User Manual’s USB cautions)

YES

Check MAIN B’DR801 5V ?


NO


YESReplace MAIN B’D IC 100

Check MAIN B’DJK405 OK ?

YES

NOReplace MAIN B’D JK405

Making

Revision

2009. 2 . 1

31/34 LCD TV Symptom USB No Connect Problem

32~47LH4000

Check IR B’D P1 Wafer& Connector

Check MAIN B’D P1304Wafer & Connector

YES

NOReplace it

YESReplace IR B’D

Making

Revision

2009. 2 . 1

32/34 LCD TV Symptom Remote Control Problem

26~42LH200032~47LH3000/LH4000



YES

NOReplace MAIN B’D IC100

IR B’D IC1 Pin #3Voltage 4V ?

NO

NOReplace it

YESReplace IR B’D IC1

NOReplace MAIN B’D IC100

Making

Revision

2009. 2 . 1

33/34 LCD TV Symptom Remote Control Problem

19~22LH2000



YES

YES

NOReplace it

Replace IR B’D

Making

Revision

2009. 2 . 1

34/34 LCD TV Symptom Intelligent Sensor Problem

32~47LH4000

Documents

LCD TV SERVICE MANUAL - go-gddq. · PDF filelcd tv service manual caution before servicing the chassis, read the safety precautions in this manual. chassis : ld91a model : 32lg2100