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Internal Use Only
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LCD TV SERVICE MANUAL
CHASSIS : LD84A

MODEL : 32LG3000
CAUTION

32LG3000-ZA

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

CONTENTS

CONTENTS .............................................................................................. 2 PRODUCT SAFETY ..................................................................................3 SPECIFICATION ........................................................................................6 ADJUSTMENT INSTRUCTION ...............................................................10 TROUBLE SHOOTING ............................................................................14 BLOCK DIAGRAM...................................................................................20 EXPLODED VIEW .................................................................................. 22 SVC. SHEET ...............................................................................................

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
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.

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

AC Volt-meter
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 1M and 5.2M. 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.

To Instrument's exposed METALLIC PARTS

0.15uF

Good Earth Ground such as WATER PIPE, CONDUIT etc.

1.5 Kohm/10W

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

SERVICING PRECAUTIONS
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
Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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 500F to 600F. 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. (500F to 600F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil. 6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature (500F to 600F) 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.

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LGE Internal Use Only

IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts. 2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC. Replacement 1. Carefully insert the replacement IC in the circuit board. 2. Carefully bend each IC lead against the circuit foil pad and solder it. 3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas). "Small-Signal" Discrete Transistor Removal/Replacement 1. Remove the defective transistor by clipping its leads as close as possible to the component body. 2. Bend into a "U" shape the end of each of three leads remaining on the circuit board. 3. Bend into a "U" shape the replacement transistor leads. 4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection. Power Output, Transistor Device Removal/Replacement 1. Heat and remove all solder from around the transistor leads. 2. Remove the heat sink mounting screw (if so equipped). 3. Carefully remove the transistor from the heat sink of the circuit board. 4. Insert new transistor in the circuit board. 5. Solder each transistor lead, and clip off excess lead. 6. Replace heat sink. Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body. 2. Bend the two remaining leads perpendicular y to the circuit board. 3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. 4. Securely crimp each connection and solder it. 5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder. Fuse and Conventional Resistor Removal/Replacement 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. 3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.
Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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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LGE Internal Use Only

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

1. Application range
This specification is applied to the LCD TV used LD84A chassis.

3. Test method
1) Performance: LGE TV test method followed 2) Demanded other specification - Safety: CE, IEC specification - EMC: CE, IEC
Model 32LG3000-ZA Market EU(PAL market) Appliance Safety : IEC/EN60065 EMI : EN55013 EMS : EN55020

2. Requirement for Test
Each part is tested as below without special appointment. 1) Temperature : 255C (779F), CST : 405C 2) Relative Humidity : 6510% 3) Power Voltage : Standard input voltage(100-240V~, 50/60Hz) * Standard Voltage of each products is marked by models. 4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM. 5) The receiver must be operated for about 20 minutes prior to the adjustment.

4. Module general specification
Item Display Screen Device Aspect Ratio LCD Module Operating Environment Storage Environment Input Voltage Power Consumption Type Size Pixel Pitch Back Light Display Colors Coating 16:9 32.0" TFT LCD HD Temp. : 0 ~ 40 deg Humidity : 0 ~ 85% Temp. : -20 ~ 60 deg Humidity : 0 ~ 85 % 100 - 240V~, 50/60Hz Power on (Green) 32" 32" 32" 32" Type:110, Max:120 760(H) x 450(V) x 47.4(D) 0.17025(H) x 0.51075 (V) 16CCFL, Straight type LG3000 LCD + Backlight LG3000 With inverter LG3000 LG3000 LG3000 MAKER : 32"- CMO LGE SPEC Specification 32" wide Color Display Module LCD Remark

16.7M (16,777,216) 3H, AG

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

5. Model general specification
Item Market Specification EU (PAL Market-26 Countries) DTV & Analog UK, France, Germany, Spain, Sweden, Finland, Italy, Netherland, Belgium, Luxemburg, Greece, Denmark, Czech, Austria, Hngary, Switzerland, Croatia, Turkey Analog Only Poland, Portugal, Norway, Bulgaria, Serbia, Slovenia, Russia, Romania Broadcasting system PAL-BG PAL-DK PAL-I/I' SECAM L/L' DVB-T(ID TV) Receiving system Scart Jack (2EA) Video Input RCA(1EA) S-Video Input (1EA) Component Input(1EA) RGB Input(1EA) HDMI Input(3EA) Analog : Upper Heterodyne Digital : COFDM PAL, SECAM PAL, SECAM, NTSC PAL, SECAM, NTSC Y/Cb/Cr Y/ Pb/Pr RGB-PC HDMI1-DTV/DVI HDMI2-DTV HDMI3-DTV Audio Input(3EA) RGB/DVI Audio Component AV SPDIF out(1EA) Earphone (1EA) USB (1EA) SPDIF out Antenna, AV1, AV2, AV3, Component, RGB, HDMI1, HDMI2, HDMI For service only L/R Input Analog (D-SUB 15PIN) PC(HDMI version 1.3) Support HDCP Scart 1 Jack is Full scart and support RF-OUT(analog). Scart 2 Jack is Half scart and support MNT/DTV-OUT. 4 System : PAL, SECAM, NTSC, PAL60 4 System : PAL, SECAM, NTSC, PAL60 Remark

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

6. Component Video Input (Y, PB, PR)
No Resolution 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 720*480 720*480 720*480 720*480 720*576 720*576 1280*720 1280*720 1280*720 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 Specification H-freq(kHz) 15.73 15.63 31.47 31.50 15.625 31.25 45.00 44.96 45.00 31.25 33.75 33.72 26.97/27 33.716/33.75 56.250 67.43/67.5 V-freq(Hz) 60.00 59.94 59.94 60.00 50.00 50.00 50.00 59.94 60.00 50.00 60.00 59.94 23.97/24 29.976/30.00 50 59.94/60 SDTV, DVD 480i SDTV, DVD 480i 480p 480p SDTV, DVD 625 Line HDTV 576p HDTV 720p HDTV 720p HDTV 720p HDTV 1080i HDTV 1080i HDTV 1080i HDTV 1080p HDTV 1080p HDTV 1080p HDTV 1080p Remark

7. RGB PC INPUT Mode
No 1 2 3 4 5 Resolution 720*400 640*480 800*600 832*624 1024*768 H-freq(kHz) 31.468 31.469 37.684 37.879 46.875 49.725 48.363 56.470 60.123 6 7 8 9 10 11 12 13 1280*768 1360*768 1366*768 1440*900 1400*1050 1680*1050 1280*1024 1920*1080 47.78 47.72 47.56 55.5 64.744 65.16 63.595 66.647 V-freq.(Hz) 70.08 59.94 75.00 60.31 75.00 74.55 60.00 70.00 75.029 59.87 59.8 59.6 59.90 59.948 59.94 60.0 59.988 Pixel clock(MHz) 28.321 25.17 31.50 40.00 49.50 57.283 65.00 75.00 78.75 79.5 84.75 84.75 88.750 101.00 147.00 108.875 138.625 WXGA WXGA WXGA WXGA WSXGA WSXGA SXGA WUXGA 19LG3000-ZA only 22LG3000-ZA only 22LG3000-ZA only FHD Model only FHD Model only Macintosh VESA(XGA) VESA VESA Input 848*480 60Hz, 852*480 60Hz -> 640*480 60Hz Display Proposed

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

8. HDMI DTV
No 1 2 3 4 5 6 7 8 9 10 11 12 Resolution 720*480 720*480 720*576 720*576 1280*720 1280*720 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 H-freq(kHz) 15.734 / 15.6 31.469 / 31.5 15.625 31.25 37.500 44.96 / 45 33.72 / 33.75 28.125 26.97 / 27 33.716 / 33.75 56.250 67.43 / 67.5 V-freq.(Hz) 59.94 / 60 59.94 / 60 50 50 50 59.94 / 60 59.94 / 60 50.00 23.97 / 24 29.976 / 30.00 50 59.94 / 60 Pixel clock(MHz) 27.00 27.00/27.03 27(54) 54 74.25 74.17/74.25 74.17/74.25 74.25 74.17/74.25 74.25 148.5 148.35/148.50 Proposed SDTV 480I SDTV 480P SDTV 576I SDTV 576P HDTV 720P HDTV 720P HDTV 1080I HDTV 1080I HDTV 1080P HDTV 1080P HDTV 1080P HDTV 1080P

9. HDMI PC
No 1 2 3 4 5 Resolution 720*400 640*480 800*600 832*624 1024*768 H-freq(kHz) 31.468 31.469 37.684 37.879 46.875 49.725 48.363 56.470 60.123 6 7 8 9 10 11 12 13 1280*768 1360*768 1366*768 1440*900 1400*1050 1680*1050 1280*1024 1920*1080 47.78 47.72 47.56 55.5 64.744 65.16 63.595 66.647 V-freq.(Hz) 70.08 59.94 75.00 60.31 75.00 74.55 60.00 70.00 75.029 59.87 59.8 59.6 59.90 59.948 59.94 60.0 59.988 Pixel clock(MHz) 28.321 25.17 31.50 40.00 49.50 57.283 65.00 75.00 78.75 79.5 84.75 84.75 88.750 101.00 147.00 108.875 138.625 WXGA WXGA WXGA WXGA WSXGA WSXGA SXGA WUXGA HDCP HDCP HDCP 19LG3000-ZA only 22LG3000-ZA only 22LG3000-ZA only FHD Model only, HDCP FHD Model only, HDCP Macintosh VESA(XGA) HDCP HDCP VESA HDCP Proposed HDCP VESA HDCP Remark

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with LD84A chassis. 5. Click "Auto" tab and set as below 6. Click "Run". 7. After downloading, check "OK" message.
(5) filexxx.bin

2. Designation
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) Power Adjustment: Free Voltage 3) Magnetic Field Condition: Nil. 4) Input signal Unit: Product Specification Standard 5) Reserve after operation: Above 5 Minutes (Heat Run) Temperature : at 255C Relative humidity : 6510% Input voltage : 220V, 60Hz 6) Adjustment equipments: Color Analyzer (CA-210 or CA110), Pattern Generator (MSPG-925L or Equivalent), DDC Adjustment Jig equipment, SVC remote controller 7) Don't push The "IN STOP KEY" after completing the function inspection.

(7) ........ OK

(6)

* 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"

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

* 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.
(1) (3)

4) Updating is staring.

Please Check Speed : To us speed between from 200 KHz to 400 KHz (2) OK

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

(4)

filexxx.bin

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.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

* After downloading, have to adjust TOOL OPTION again.
1) Push "IN-START" key in service remote controller 2) Select "Tool Option 1" and Punch in the number.(Each model has their number.) 32LG5000-ZA : 8977 3) Completed selecting Tool option

Impress Resolution 1080i Model : 223 in Pattern Generator(1080i Mode) Pattern: 65 in Pattern Generator(MSPG-925 series)

3.1. ADC Process
(1) PC input ADC
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 Series) Adjustment pattern(COMPONENT) - Adjust by commanding AUTO_COLOR_ADJUST. 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 " G " key at "ADC CALIBRATION :COMPONENT". Impress Resolution 480i

Adjustment pattern(PC) - Adjust by commanding AUTO_COLOR_ADJUST. 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 " G " key at "ADC CALIBRATION: RGB-PC".

Impress Resolution 1080i

(2) COMPONENT input ADC
1) Component Gain/Offset Adjustment - Convert to Component in Input-source - Signal equipment displays Impress Resolution 480i

3.2. Function Check
(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.

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

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

4. Total Assembly line process
4.1. Adjustment Preparation
(1) W/B Equipment condition CA210: CH 9, Test signal: Inner pattern (85IRE) (2) Above 5 minutes H/run in the inner pattern. ("power on" key of adjust remote control) (3) 15 Pin D-Sub Jack is connected to the AUTO W/B EQUIPMENT. (4) Adjust Process will start by execute I2C Command (Inner pattern (0xF3, 0xFF).
Color Temperature Medium 9,300 Cool 11,000 K X=0.276(0.002) Y=0.283(0.002) K X=0.285(0.002) Y=0.293(0.002) Warm 6,500 K X=0.313(0.002) Y=0.329(0.002) Inner patern (216gray,85IRE)

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).

(5) 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 "G" key at "3.W/B ADJUST".

4.6. EDID DATA
(1) ANALOG DATA 128Byte (2Bi)

* 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.

(2) DIGITAL DATA(HDMI-1) 256Byte

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: ([email protected] 50/60Hz) - Confirm DPM operation at the state of screen without Signal

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

(3) DIGITAL DATA(HDMI-2) 256Byte

4.12 Internal pressure
Confirm whether is normal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for one second

(4) DIGITAL DATA(HDMI-3) 256Byte

1) All Data : HEXA Value 2) Changeable Data : *: Serial No : Controlled / Data:01 **: Month : Controlled / Data:00 ***:Year : Controlled ****:Check sum

4.7. HDCP (High-Bandwidth Digital Contents Protection) SETTING (Scaler : Mstar)
- Connect D-sub Signal Cable to D-Sub Jack - Input HDCP key with HDCP-key- in-program - HDCP Key value is stored on EEPROM (AT24C512) which is 0x80 addresses of 0xA0 page - AC off/ on and on HDCP button of MSPG925 and confirm whether picture is displayed or not of using MSPG925 - HDCP Key value is different among the sets.

4.11 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)

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

TROUBLESHOOTING
1. No Power
(1) Symptom
1) It is not discharged minutely from the module. 2) Light does not come into the front LED.

(2) Check process
No
Is inserted a plugged in power cord? Plug in the power cord.

Yes

Is the Line Filter and Power Board Cable connected?

No
Connect the Cable.

Is the fuse of PSU normal?

No
Replace the Fuse.

Yes

Is it connected that PSU and P1100 in Main B/D?

No
Connect the Cable P1100.

Yes

After all cables connect is removed to PSU, the AC voltage marking is authorized on manual. When ST-BY 5V, +15V are not operated, replace PSU.

If there is normal status, Replace main board.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

2. No Raster
(1) Symptom
1) No OSD abnd image occur at screen. 2) It maintains the conditioon where the front LED is blue.

(2) Check process

No
Does minute discharge at Module? Is the inverter on?

No

Is output the normality Low/High voltage except Stand-by 5V?

No
Replace the Power board.

Yes
Check the LCD Module.

Is the link cable normal?

No

Reconnect Panel link cable. (P401 or P406 or P407)

Yes

No
Is the IC801's output normal? Replace the Main board.

Yes

Change the IC(IC100).

* Caution
Before change Main Board, Check S/W version and White Balance value. Change Main bord. S/W download and set White Balance value.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 15 -

LGE Internal Use Only

3. Unusual display from TV/CATV mode
Is video output of the Tuner normal?(CheckTU500 _Pin15)

No

Is the input voltage normal?(Check TU500_Pin4)

Yes

Is the I2C communication Normal?(Check Pin10, Pin11)

Yes
Replace Main board.

No Yes
Check the Power.

No
Check the Tuner.

Is the LVDS cable connected well?

No
Cable inserts well.

Yes
Change the IC(IC100).

BLOCK A

4. Unusual display from DTV mode
Is video output of the tuner normal?(Check TU500_ pin24~pin34)

No

Is the input voltage normal?(Check Pin21,22)

Yes

Is the I2C communication Normal? (Check Pin18, Pin19)

Yes
Replace Main board.

Yes
Same as Block A.

No
Check the Power.

No
Check the Tuner.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 16 -

LGE Internal Use Only

5. Unusual display from AV1/AV2(SCART) mode
- CVBS Input
Is video input of SCART Jack normal?(Check JK600, JK601_Pin20)

- RGB Input
No
Check the input source. Is video input of the RGB Jack normal?(Check JK600 _Pin7,11,15)

No
Check the input source.

Yes
If there is normal status, Replace main board. Same as Block A.

Yes

Is waveform of Switching IC normal? (Check IC700_Pin11, 12,13)

No
Check the IC700.

No
If there is normal status, Replace main board. Same as Block A.

6. Unusual display from AV3(SIDE AV) mode
- CVBS Input
Is video input of RCA Jack normal? (Check R704)

No
Check the input source.

Yes
If there is normal status, Replace main board. Same as Block A.

7. Unusual display from Component mode
- CVBS Input
Is video input of the Component Jack normal?(Check R733, 734,735)

No
Check the input source.

Yes
If there is normal status, Replace main board. Same as Block A.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 17 -

LGE Internal Use Only

8. Unusual display from RGB mode
Is video input of the RGB jack normal? (Check JK703_Pin1, 2,3,13,14)

No
Check the input source.

Yes

Is waveform of Switching IC normal? (Check IC700_Pin11, 12,13)

No
Check the IC700.

No
If there is normal status, Replace main board. Same as Block A.

9. Unusual display from HDMI 1/2/3 mode
Is video input of the HDMI jack normal? (Check JK900, 901,902)

No
Check the input source.

Yes

Check DDC communication lines(IC900,901,903 _Pin5,6

No
Check the IC900, IC901, IC903.

Yes

Check HDCP communication lines (IC902)

No
Check the IC902 and DHCP value

Yes

Is waveform of Switching IC normal? (Check IC902)

No
Check the IC902.

No
If there is normal status, Replace main board. Same as Block A.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 18 -

LGE Internal Use Only

10. No Sound
(1) Symptom
1) LED is blue 2) Screen display but sound is not output.

(2) Check process

No
All input is no sound?

Is the speaker "on" on menu?

No
Set on speaker on menu.

Yes

Yes

Only HDMI is no Sound?

No
Download the EDID data.

Is the Speaker cable normal?

No
Check th Speaker cable.

Yes

Yes

No
Only RF or DTV is no sound? Check the Tuner in/Out.

IC100 operate normally?

No
Replace IC100.

Yes

IC1000 operate normally?

No
Replace IC1000.

Yes

Replace main board.

* Caution
Before change Main Board, Check S/W version and White Balance value. Change Main bord. S/W download and set White Balance value.

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 19 -

LGE Internal Use Only

SC2_L/R_IN DTV/MNT_L/R_OUT KIA7427 (IC104) RESET I2C I2C_A_TU 24C512 (IC105)

DTV/MNT_V_OUT SC2_CVBS_IN

SC1_CVBS_IN TV_L/R_OUT SC1_L/R_IN

I/O Expander (IC103)

SC1_R/G/B SC1_TV_VOUT R/G/B

STMAV340 (IC700)

DSUB_R/G/B

EEPROM

Flash Memory 4MB (IC102)

DDC/UART-Tx/Rx

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
Flash Memory 4MB (IC101)

DSUB_H/V_SYNC

LCD Panel
52/47/42/37" : FHD 32": : HD

PC_L/R_IN

5V_ANT_MNT

BOOSTER TV_CVBS

Saturn3+
LVDS

DDR Memory DDR Memory 256Mb (IC300) 256Mb (IC300)

TV Tuner

BLOCK DIAGRAM

- 20 PCM_ADD TS_Parallel PCM_CD_ON PCM_DATA TS_Serial TPA6110A2 (IC1002) 74LVC541A (IC800)

SIF

TU_TS_DATA

I2C_D_TU / I2C_A_TU

LED_G/R & IR KEY1/2 IIC(Eye Q II)

COMP_Y/Pb/Pr

COMP_L/R_IN

74HC4066 (IC1001)

USB_DM/DP

MAX3232 (IC702)

CI Slot
(P800)
MUTE CI_CD_1/2 KIC7SZ32FU (IC802) IIS SP (L)

EEPROM EEPROM EEPROM

Head phone Out

Side_Y/C/V/L/R

HDMI_I2C_0

SPDIF Out

HDMI_CEC x3

HDMI_I2C HDMI_CEC/Rx/HPD

TMDS x3 HPD x3

HDMI Switch (IC902)

NTP3000A (IC1000)
P1000 SP (R)

LGE Internal Use Only

5V_HDMI

MEMO

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 21 -

LGE Internal Use Only

EXPLODED VIEW

401

400

521

540

530

821

550

910

904 901

830

804

803

800

802

801

805

200

120

122

902

905

510

121

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

300

500

- 22 -

900
LGE Internal Use Only

903

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

LGE Internal Use Only

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

LGE Internal Use Only

Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

LGE Internal Use Only

P/NO : MFL41037107

Feb., 2008 Printed in Korea