LG 26LH2000 Service Manual Tv User Guide Manual Operating
Contents
1. ui T2 DET L 1105 ik L 18 Z R1133 SC1_ID 2 16 JK1101 JK1100 1RIN 2 814 FS s LL OUT 1 ipt 02 P7 TIS A DTV MNT R OUT I 1700 P 00pF R1160 R OU 002 SCART2 PIN 8 Audio Out Amp Scart Audio Mute 9 112 10K 15 1 AJ19 SC REI AIB DTV MNT R OUT 01131 sB MUTE SCART2 MUTE THE AN SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC SECRET LGElectronics ELECTRONICS MODEL Tenssussesss DATE BLOCK scans SHEET LGE Internal Use Only 5V GENERAL 3 L1204 MLB 201209 0120P N2 R1229 10 WO R1231 10 00 TU1200 01202 t X TDFW G235D El ISA1530AC1 fy R1230 a 2 2K 212 i on 5 B 5V GENERAL p A 22. R1232 11201 01203 B 10K M MLB 201209 0120P N2 u AS 1222 0 01uF C1207 C1208 1209 25V 0 100pF ZZo0 1iurF 50V 16V 10 ee E J5 L OPTION RF AGC L 4 1212 H H 1210 Zo 0 1uF 16V R1207 47 167 ga E FE TUNER SDA TN 1209 A H5V GENERAL AES o AN FE AGC SPEED CT 5 C i sov 25 3052 A 120 47 gt FE TUNER SCL 1240 R1241 1206 200 200 47 5 8 50V dicm ES _ _ _ E R1205 0 1238 0 R1239 B 1205 1K ISA1530AC1 C1216 E RIZZI i 100pF 50V 33 L DA A gt FE_DEMOD_SCL 5V_GENERAL X E R1222 47pF 47pF R122 Tsov 470 81228 gt FE_SIF s 3 3V TUNER 1215 r 6v R1210 47 TS CLK ISA1530AC1 81226 01201 0 zl R1211 47 FE_TS_DATA 7 4 7K H 5 unnm R1212 47 FE TS DATA 6 FE RESET R1213 47 FE TS DATA 5 5 H an R1214 47 FE_TS_DATA 4 z 2 R1215 47 TS DATA 3 A gt R1216 47 FE TS DATA 2 E R1217 47 FE TS DATA 1 9 4 p HE R1218 47 FE TS DATA 0 ne mm To E R1219 47 d R1220 47 FE TS SYN
3. E16 E19 T19 UART2_TX JO I RT E16 E20 T19 UART2 HDCP EEPROM MCU BOOT STRAP 1 Addr 10101 11 c1 l m DIM ES S 2 WHO I DIM wie j PWM2 pumo luF E I o opt i c 5 5 BUF TS DATA O BUFLTS SYN 2 13 V TUNER puma m BUF TS CL 1 AE17 SCART2 DET gt 55 55 11 49 cii I 11 10 m s t 100 a 10 xis new 52 GPIO96 UI 2 TT 128 OUT MUTE Jo P PR o MODEL OPTION In cip GP10103 125 007 5b3 I POWER DETECT GPIO102 249 15 12V 15V 3 EL_OPT_O POWER DET MEMC RESET 1600 4 100 4 EL OPT 1 36055 MODEL OPTION FE RESET R1611 e EL OPT 3 MODEL OPT 0 D6 LCD PDP 4 7K ov ze
4. is different from HDMI3 For Analog EDID D sub to D sub For HDMI EDID DVI D to HDMI or HDMI to HDMI No Item Condition Hex Data 1 Manufacturer ID GSM 1E6D 2 Version Digital 1 01 3 Revision Digital 3 03 Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals 1 Analog Data 128Byte 2Bi 11 2 4 5 6 7 8 00 00 00 10 c 23 7 57 20 o 4 Ai 8 0 40 45 40 101 a a 66 21 50 51 0 18 40 36 00 7 2 00 o 2 0 17 15 50 6 28 55 00 7 42 0 o i 0 00 0 60 iF 46 10 00 20 0 20 20 20 20 70 d 02 20 4 10 1 3 5 02 90 22 15 01 26 15 0 50 09 57 07 f 18 7 16 20 58 2c 25 7 42 00 00 1D 00 8 51 2 4 35 00 7 BA 2 00 00 00 20 20 10 10 96 00 7E 4 00 00 18 o 80 1 20 4 58 2c 45 00
5. 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage AC 100 240 V 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 5 minutes prior to the adjustment 4 Component Video Input Y No Specification Resolution H freg kHz V freg 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 T 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 10801 11 1920x1080 33 75 60 00 HDTV 10801 12 1920x1080 33 72 59 94 HDTV 10801 13 1920x1080 56 250 50 HDTV 1080p 14 1920x1080 67 5 60 HDTV 1080p Copyright 02010 LG Electronics Inc All right reserved 6 LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals 5 RGB PC No Specification Proposed Remark Resolution H freq kHz V freg Hz
6. 1 5 Kohm 10W 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 s
7. 3 Main PCB check process APC After Manual Insult executing APC Boot file 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 Error is displayed Check connection between computer jig and set 3 Click Read tab and then load download file XXXX bin by clicking Read MStar ISP Utility VA 1 8 E2PROM Device Setting initio spect 74 s C SDAout C SCL out LE 3 Roughly Speed 450 KHz pin 2 1 Auto Detect Reverse High IV pin 1 switch UART T2c Labelt gt Bist Pull all Pin High Use USB Communication Setting Elapsed Time USB 450KHz Please Check the Speed To use speed between from 200KHz to 400KHz Flash Status 00 Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals Connect Dis B P V Restore HDCP Checksum LAG ro File Status Unused Bytes Start Addr 25000000 0x00 OxFF End Addr Batch File Elapsed Time nec USB 450KH2 4 Click Connect tab If Cant is displayed check connection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK mes
8. FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS SECRET ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LGElectronics L GElectronics LG ELECTRONICS MODEL DATE ave SHEET LGE Internal Use Only FROM LIPS amp POWER 1 PANEL POWER 12V 2 12V_PANEL 12V 418V A 2848 100 IC808 MP2305DS PANEL POWER NEL POWER PANEL BLMIBPG1215N1D 1821 1 AK10 nm 43 3 1 450 mA 5 out 1 8 21 LI ee L817 16 2 BLM18PG1215N D om 3c oe EIE 7 BD9150MUV d OFFl 11 C c 1807 CB32160A121 3V_TUNE pa i 1 AK11 POWER
9. No Color Problem Revision 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported Check the Component Cable YES Check MAIN B D R419 __ MAIN B D JK400 Check Replace MAIN B D JK400 Video Signal NO NO YES Check MAIN B D C209 C215 Y C216 Pb Replace C214 Pr MAIN B D C209 or C214 or C215 or C216 Video Signal Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom RGB No Video Problem ma 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported Check the RGB Cable ves MAIN B D P400 Pin 2 Video signal R437 has Vsync MAIN B D P400 Check Replace MAIN P400 R440 has Hsync NO Check MAIN B D C208 Video R246 HSYNC Replace R245 VSYNC MAIN B D C208 or R246 or R247 Replace MAIN B D IC 100 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom RGB No Color Problem ma 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported Check the RGB Cable MAIN B D P400 Pin 43 BLUE Pin Z2 REE MAIN B D P400 Check Replace MAIN B D P400 Pin 41 RED NO Video signal Check MAIN B D C212 RED C207 GREEN EE MAIN B D C213 Vide
10. TS DATA 0 7 FE TS TS VAL FE TS SYN DVB CI DETECI E Sie 5 201209 0120 42 3 3 3 TUNER t TE SHIELD s 1u 1 16v B 1 2 TUNER X FE TS VAL K FE_TS_ERR 1227 5 zd c ER 0 luF 167 1220 0 1uF GND R1245 16V FE TS VAL ERR 47 R1223 0 gt FE_TS_ERR SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS SECRET ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE sCHEMETIC LGElectronics TENER MODEL DATE SHEET LG ELECTRONICS 11 LGE Internal Use Only M 1 81378 81379 odule n mix o NTROL PHS EH IR amp LED LI AN LVDS SEL Lvbs exp 585279 19 22 26LH2000 LVDS HD 26 42 7 ae 12PIN IR P130
11. Detail EDID Options are below Product ID Model Name HEX EDID Table DDC Function FHD Model 0001 01 00 Analog Digital HD Model 0000 00 00 Analog Digital Serial No Controlled on production line Month Year Controlled on production line ex Monthly 09 09 Year 2006 gt 10 II Model Name Hex MODEL MODEL NAME HEX all 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 Checksum Changeable by total EDID data O Vendor Specific HDMI INPUT MODEL NAME HEX HDMI1 67030C001000011D HDMI2 67030C002000011D HDMIS 67030C003000011D 11 LGE Internal Use Only 4 5 V COM Adjust Only 37 42 47LH4000 ZA Why need Vcom adjustment B The Vcom Common Voltage is a Reference Voltage of Liquid Crystal Driving gt Liquid Crystal need for Polarity Change with every frame Circuit Block Data nput Power Input 5 lt 1 RS 8 Liquid Crystal Adjust seguence After enter Service Mode by pushing ADJ key Enter V Com Adjust mode by pushing gt key at 10 V Com pushing the right or the left button on the remote controller Find the V COM value that is stopped the Flicker If there is no flicker at default value turn down or turn up at least 20 step and check the flicker Then go to the default value y Visual Adjust
12. Downloaded From TV Manual com Manuals LCD TV Symptom SPDIF No Audio Problem Waking 2009 2 1 26 42LH2000 32 47LH3000 LH4000 ees Wa ose Lir YES YES YES Check MAIN B D R230 PWM Signal Replace MAIN B D IC 100 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals USB No Connect Problem 31 34 32 47LH4000 LCD TV Symptom Check that the USB Memory amp HDD are supported by Spec Refer to User Manual s USB cautions YES Check MAIN B D Replace MAIN B D JK405 JK405 OK YES Check MAIN B D JK405 Pin 1 5V Replace MAIN B D IC 100 NO Check MAIN B D R801 5 Replace MAIN B D 402 NO Check MAIN B D Roda 12V 2 YES Replace MAIN B D IC808 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom Remote Control Problem Making 2092 1 Revision 3234 26 42LH2000 32 47LH3000 LH4000 Check MAIN B D P1304 YES Check IR B D P1 Wafer Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom Remote Control Problem 2092 1 Revision 3334 19 22LH200
13. R1604 B9 HD 3 Hs b MOVING MODEL OPT 2 11 A7 100 00 USB CTL 1 MODEL OPT 3 100 SCART1_MUTE 9 A125 ho vM tl INDE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN TRE N MODEL eaxsosesooa DATE MAIN 1 GHEET 1 SECRET LGElectronics LG ELECTRONICS SYMBOL MARK OF THE SCHEMETIC BLULK LGE Internal Use Only LGE3368A RXALN RXA2P HPDl HDMI R201 R202 R203 HPD2 R248 0 R249 R200 R204 100 S SS SS SS SCART RGB D SUB 4 K13 4 K12 COMP TI R205 47 Sci R206 n INI R226 47 4 M2 gt CVBS IN 19 R227 41 47 47 l FE VMAIN THE AN SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES S
14. 2009 2 1 Revision 2434 26 42LH2000 32 47LH3000 LH4000 omponent Video YES Check the CVBS Cable YES Check MAIN B D JK400 Replace MAIN B D JK400 YES MAIN B D C2013 Right Sound C2014 Left Sound signal NO Check MAIN BD C2013 C2014 Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom HDMI PC No Audio Problem Making 092 1 _ Revision 2584 26 42LH2000 32 47LH3000 LH4000 LCD TV RGB Video OK Check the PC Audio Cable Check MAIN B D JK401 Replace MAIN B D JK401 N MAIN BD C2015 Right Sound C2016 Left Sound Replace MAIN B D IC 100 signal Check MAIN B D C2015 C2016 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom HDMI DTV No Audio Problem Making 2000 2 1 26 42LH2000 32 47LH3000 LH4000 HDMI Video OK Check the ADJUST MENU Download EDID EDID OK Refer to Adjustment Spec Check the HDMI Cable Replace MAIN B D IC100 YES Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom AV1 No Audio Out Problem Making 2092 1
15. gt MDI 0 7 PCM D 0 7 gt eos 4 eu ADDR 0 7 a E E 0 7 US FE VMAIN FE VOUT ES 5 CVBS IN m Mstar 56 H SCART DTV MNT VOUT E SC2 CVBS IN LGE3368A AV3 AV CVBS IN 009 No DVIX 5000 COMP Y Pb Pr IC100 RGB DSUB R G B DSUB H VSYNC y 5 1 2 L R IN AUDIO IN AM AUDIO AV L R IN COMP_L R_IN PC_L R_IN Head TPA6110A 1 700 RS 232C p MAX3232CDR 16209 SPDIF OUT SPDIF Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals Main Block LCD Panel KIA7027 Reset 74LX1G14C IC108 1 101 Schmitt Trigger Voltage Detecto ad For Boot Serial Flash IC104 For Triton 5 SDDR_D 0 15 al TDDR D 0 15 EEPROM PCM A 0 7 NAND Flash AT24C512 HYNIX IC105 Dc 1102 EEPROM AT24C512 HDCP IC107 125 Digital amp NTP3100L IC701 MP6211DH SB DM DPUSB USB Power USB Power IC402 HPD1 2 3 HDMI CEC 5V HDMI 1 2 3 C pm TMDS 0 7 Data Clock LGE Internal Use Only Block diagram M S T Con Block Only for 37LH4000 M S Main B D T con B D To Right LCD Panel VCC VDD EAST a a z gt P Gamma IC 111111 d a 4144411 5 BUF16821 2 IC402 GVST Sh
16. 7 2 o 10 00 7 1 16 20 Fo 10 2c 5 80 76 e 00 o 00 00 00 o 00 05 2 5 7 8 00 00 rr rr rr o b 10 or o 8 7 78 CF 72 57 4c 23 20 4C Ar o8 00 61 40 20 40 01 or o1 or or 66 21 5o Bo si 00 18 30 40 40 36 00 7E 42 00 00 1E 01 1D 72 51 00 1E 20 50 28 55 00 2 00 00 00 oo 00 60 iF 46 10 0 20 20 20 20 20 d 70 d e 02 o 2 ir 13 6 14 02 2 2 2 2012 15 0 5 15 07 50 o 57 07 f Aol f 8 71 1C 16 20 58 2c 25 00 7E 00 00 or 1D oo amp 5 po oc 20 4o amp 35 00 7 8 4 00 1 20 Eo 2D 10 10 00 7 2 0 0 18 8 18 71 38 2D 4 58 2C EO 45 00 7E BA 2 0 0 1E 1D 8 do 7 1C 16 20 Fo 10 25 8 7E 8 2 0 0 9E 0 00 00 00 00 D5
17. G North Latin America http aic lgservice com Europe Africa http eic lIgservice com Asia Oceania http biz lgservice com LCD TV CHASSIS LD91A MODEL 32LD320 32LD320 ZA 32LD320N 32LD320N ZA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL _ _ P NO MFL50326844 1004 REVOO Printed in Korea CONTENTS GONTENTS 2 PRODUCT SAFET Y t k CEPI d D LM 3 SPECIFICATION ec m 6 ADJUSTMENT INSTRUCTION 8 EXPLODED VIEW ieninsasssa En cL XN QR ER ERR MF RYE EE Wi 13 SHEED Copyright 02010 LG Electronics Inc All right reserved m LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals SAFETY PRECAUTIONS Schematic Diagram and Exploded View Shock Fire or other Hazards IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by A in the Do not modify the original design without permission of manufacturer It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Gener
18. HDMI DVI Check S W Version Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals Revised date LGD Module Only Other Module Replace T Con Board Replace And Adjust VCOM Module N Replace Main B D Replace module in abnormal displaying after exchanging T Con B d Connect other external device and cable p Replace Check normal operation of Main B D External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main B D LGE Internal Use Only Standard Repair Process Er B Power error 220083105 LCD TV Tm date DC Power on by pressing Power Key On Remote control Check Check Power Replace Power LED gt On High Power B D Stand By Red N Operating Green Check Power cord Replace Main B D was inserted properly X Check amp Repair Measure voltage of each output of Power B D Mechanical Power switch on Local control of TV Replace Main B D N Check ST BY 5V Y Replace Power B D x 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 lig
19. RB 1386 WON 0 R116 LGE3368A Saturn6 No DivX _ _ R193 B3 ecm proy acie 5 ee TESTPIN GND 1524 33 A 5 R1525 33 PCM A 0 14 R1526 33 _ 3 PCM A 2 PCM PCM A 0 USB DP 2 PF R1509 c Q100 KRC1038 P assignment Recommended by MStar es ae eee ee ID ee ey tn E Oe Paes a SEG Pon ie NE QM Rr z LED 8 811 EU rd cc bre LT ESSE xem I 100 Serial FLASH MEMORY W25X32VSSIG EEPROM IC105 EAN43352801 ATMEL 1 16105 or OIMMRMP 008A MICROCHIP e M24512 WMW6 Fog 10140 E RUN 100 C gt a gt seror JEEPROM_SDA 20 19 1 lt
20. 232C RS 232C COMMAND MIN CENTER MAX CMD ID DATA DEFAULT Cool Mid Warm Cool Mid Warm RGain jg Ja jd 00 172 192 192 255 GGain 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 Caution Color Temperature COOL Medium Warm One of Gain G Gain B Gain should be kept on OxCO and adjust other two lower than CO when R G B Gain are all CO it is the FULL Dynamic Range of Module Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals 10 Manual W B process using adjusts Remote control After enter Service Mode by pushing ADJ key Enter White Balance by pushing gt key at 3 White Balance 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 Push the IN STOP key after completing the function inspection 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 S
21. 26 42LH2000 32 47LH3000 LH4000 A Check the Trouble Shooting Guide Analog TV Audio OK Analog 5 Check the 5 Cable Check MAIN B D JK1100 Replace MAIN B D JK1100 YES MAIN B D R239 Right Sound R240 Left Sound signal Replace MAIN B D IC 100 YES Replace MAIN B D 1103 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom AV2 No Audio Out Problem Making 2092 1 26 42LH2000 32 47LH3000 LH4000 Check the Trouble Shooting Guide Speaker Audio OK Related to Audio Problem YES Check the SCART Cable YES Check MAIN B D JK1101 Replace MAIN B D JK1101 YES MAIN B D R250 Right Sound 1 R251 Left Sound Replace MAIN B D IC 100 signal YES Replace MAIN B D 1103 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom Headphone No Audio Problem 2992 1 Revision 29 26 42LH2000 32 47LH3000 LH4000 YES YES YES MAIN BD R237 Right Sound R238 Left Sound Replace MAIN B D IC 100 signal YES Replace MAIN B D IC700 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes
22. CAUTION Be sure no power is applied to the chassis or circuit and observe all other safety precautions 8 Minimize bodily motions when handling unpackaged replacement ES devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device General Soldering Guidelines 1 Use a grounded tip low wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 F to 600 F 2 Use an appropriate gauge of RMA resin core solder composed of 60 parts tin 40 parts lead 3 Keep the soldering iron tip clean and well tinned 4 Thoroughly clean the surfaces to be soldered Use a mall wire bristle 0 5 inch or 1 25 cm brush with a metal handle Do not use freon propelled spray on cleaners 5 Use the following unsoldering technique a Allow the soldering iron tip to reach normal temperature 500 F to 600 F b Heat the component lead until the solder melts c Quickly draw the melted solder with an anti static suction type solder removal device or with solder braid CAUTION Work quickly to avoid overheating the circuit board printed foil 6 Use the following soldering technique a Allow the soldering iron tip to reach a normal temperature 500 F to 600 F b First hold the soldering iron tip and solder the strand against the componen
23. Fix information iE iti S W Version ki external device cable Fixin Map accordance with technical information Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process Established Error ENose date t sympiom Circuit noise mechanical noise Revised pate D Replace inverter lace inverter With Inverter Module Identify Check location of type Replace LIPS B D Without Inverter Module al Check location of noise x When the nose is severe replace the module For models with fix information upgrade the S W ide the d ipti Mechanical noise is a natural r prorice phenomenon and apply the 1st level x If there is Tak Tak noise from the 2 2 the customer does not cabinet refer to the KMS fix information and agree apply the process by stage then proceed as shown in the solution manual Describe the basis of the description For models without any fix information in Part related to nose in the Owner s provide the description Manual Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process F Exterior defect Established 5565 3 05 LCD TV date symptom Exterior def
24. Pixel Clock MHz 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 60 Hz 852 480 60 Hz gt 640 480 60 Hz 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 128071024 63 595 60 0 108 875 SXGA FHD model 8 1920 1080 66 587 59 93 138 625 WUXGA FHD model 6 HDMI Input PC DTV 1 DTV 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 10801 6 1920 1080 28 125 50 00 74 25 HDTV 10801 T 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 2 PC 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 128071024 63 595 60 0 108 875 SXGA HDCP FHD model 8 1920 1080 67 5 60 00 138 625 WUXGA HDCP FHD model Copyright 02010 LG Elec
25. R85 R86 LGD V3 LGD V4 AUO PSU rp PSU A 20 20 20 1 20 20 OP x 21 PIN 21 ADIM 21 ADIM 21 ERROR 21 ERROR 22 PIN 22 ERROR 22 ERROR 22 PbIM 22 GND 24 PIN 24 PDIM orc Nc 24 465 mA 85 efficiency E 7 3 1812 5 MAX 3A 24V 1 K 1 26 VDDC er 12 1 Es Close to IC 2 2uF ala 2 Vout 0 8 1 R1 R2 R825 2 RB24 MP2212DN ub THE AX SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS SECRET SECRET MODEL EAX60686904 DATE 2009 03 25 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LGElectronics LG ELELTRONILS BLOCK SHEET LGE Internal Use Only
26. amp record S W Version and White Main Board Balance value before replacing the Main Board Space T Re enter White Balance value Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process A Video error Established 2008 3 05 LCD TV T date symptom video No audio Revised date Check various Check and No Video voltages of Power replace No audio Board 5V 12V 20V i MAIN B D or 24V Replace Power Board and repair parts Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process A Picture Problem Established I 3 105 date Picture broken Freezing Revised using Digital signal level meter By using Diagnostics menu on OSD Check RF Signal level Menu Setup Diagnostic Signal strength Normal over 50 Signal Quality Normal over 50 Check whether other equipments have problem or not By connecting RF Cable at other equipment DVD Player Set Top Box Different maker TV etc m Menu Setup Booster 2 Install Booster Check RF Cable PM Connection ec 1 Reconnection S W Version B On Off Check Off On Check Y S W Upgrade Contact with signal distributor
27. and control the Voltage level Push the store button by OK key in the ADJ remocon 4 6 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 7 Internal pressure Confirm whether is normal or not when between power board s ac block and GND is impacted on 1 5 kV dc or 2 2 kV dc for one second Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals 12 5 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 des Software Update 5 1 Signal TABLE CMD LENGTH ADH ADL CMD Aoh LENGTH 85 94h 1 16 bytes ADH EEPROM Sub Address high 00 1F ADL EEPROM Sub Address low 00 Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 5 2 Command Set me eme owes Deme DATA 1 Data n cs DELAY Description FOS Default write 7mode data write Vtotal Frequency Sync Hstart Vstart 0 Phase Data write Model Name and Serial Number write in EEPROM 5
28. and service purposes Downloaded From TV Manual com Manuals 3 1 ADC Process 1 ADC Input signal Component 480i Signal equipment displays Adjustment pattern Component 4801 MODEL 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 p key at 5 ADC Calibration t 2 H 558 ADC Calibration ADC Comp 480i EN ADC Comp 1080 ADC RGB EN tat 14 25 3 4 5 6 8 9 1 1 1 Caution Using power on button of the Adjustment R C power on TV ADC Calibration Protocol RS232 Item 1 2 Datao Adjust A A 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 Adjust Seguence aa 00 00 Enter Adjust Mode xb 00 40 Component1 Input 480i 00 10 Adjust 480i Comp1 xb 00 60 RGB Input 1024 768 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 TV 2 AV SCART1 SCART2 CVBS 3 COMPONENT 480i 4 RGB 1024 x 768 60 Hz 5 HDMI 6 PC Audio In Display and sound check is executed by
29. copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on the component side of the circuit board 1 Remove the defective copper pattern with a sharp knife Remove at least 1 4 inch of copper to ensure that a hazardous condition will not exist if the jumper wire opens 2 Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern 3 Connect insulated 20 gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side Carefully crimp and solder the connections CAUTION Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges LGE Internal Use Only SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 1 Application range 3 Test method This specification is applied to the LCD TV used LD91A 1 Performance LGE TV test method followed chassis 2 Demanded other specification Safety CE IEC specification 2 Requirement for Test TEMO E IEG Each part is tested as below without special appointment 1 Temperature 25 5 C 77 F 9 F CST 40 5
30. 0 Check MAIN B D P1305 Replace it Wafer amp Connector NO YES IR B D IC1 Pin 43 Voltage 4V Replace IR B D IC1 gu Replace MAIN B D IC100 JD Pi Werer Replace MAIN B D IC100 onnector NO Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Intelligent Sensor Problem Making 2009 2 1 32 47LH4000 Check MAIN B D P1304 Wafer amp Connector NO YES Check IR B D P1 Wafer YES pisos Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals
31. 00 32 47LH3000 LH4000 AV1 Video OK YES Check the SCART Cable Check MAIN B D JK1100 Replace MAIN B D JK1100 YES MAIN B D C229 Right Sound C230 Left Sound signal NO Check MAIN B D C229 C230 Replace MAIN B D IC 100 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom AV2 No Audio Problem Making 2092 1 26 42LH2000 32 47LH3000 LH4000 AV2 Video OK YES Check the SCART Cable Check MAIN B D JK1101 Replace MAIN B D JK1101 YES MAIN B D C2008 Right Sound C2009 Left Sound signal Replace MAIN B D IC 100 NO Check MAIN B D C2008 C2009 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom AV3 No Audio Problem Waking 2092 1 26 42LH2000 32 47LH3000 LH4000 AV3 Video OK YES Check the CVBS Cable i YES Check MAIN B D JK402 Replace MAIN B D JK402 YES MAIN B D C2011 Right Sound C2012 Left Sound signal NO Check MAIN B D C2011 C2012 Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom Component No Audio Problem Making
32. 3 method amp notice A Serial number D L is using of scan equipment B Setting of scan equipment operated by Manufacturing Technology Group C Serial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D book 4 0 LGE Internal Use Only EXPLODED VIEW IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by A in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer Copyright 2010LG Electronics Inc All right reserved 13 LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals NAND FLASH MEMORY VOLTAGE DETECTOR Mstar reset Active high reset 0 7 PCM A 7 5 5 2 PCM A 6 as 8 PCM AISI IC100
33. 4 FF100 SCL SUB AMPL SCL External VBR SDA SUB AMPL SDA ie ond oP GND BIMIBPGIZ1SNID I RESET gt KEYI LvB KEY2 M uvB_ckp gt 01202 i 5 55 Ix GND LvB LD 5 _2 IR LVB 1P gt iM D gt GND 2 3 LVB PWR ON NE R1370 R1371 E 10BIT X ws x E SEL 2 1 LVDS MNT 19 22 WARM LED ON LED LED_ON LED_R Ld LlLI cl R1305 100 IR 1 BLMISPGI21SN1D ns oie L R1304 A Zener Diode is 1 i close to wafter tros D LVDS WAFER BIMISPGI2 Ld e I THE AX SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS SECRET ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE LGElectronics LG ELECTRONICS MODEL DATE BLOCK morursscrr SHEET LGE Internal Use Only 45 LG Electronics Inc Block diagram 19 22 26 32 37 42LH2000 32 37 42 47LH3000 32 37 42 47LH4000 A gt O TS CLK ERR SYN DATA 0 A gt 75 DATA 0 7 2 EIFE TS DATA 0 7
34. CS MODEL DATE THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LGElectronics BLOCK som SHEET LGE Internal Use Only SPK L SPEAKER 1 R713 S SPK L 11 R704 1 21 3740 9 R716 2 X21 AUDIO MASTER D m K Rt 12 SPEAKER R R719 MCLK SDATA WCK BCK TP is necessory R722 R720 R721 R709 R710 2 1 AA22 WAFER ANGLE MonitorO 1 2 TP is necessory e EARPHONE m m m TPA6110A2DGNRG4 uu 5 cns e I BOTTOM M l m bg m if t cme edd 16V HP DET 1 5 3 2 x19 i 2711 Is d SIDE HP TRANSFER L BREAK L BREAK R TRANSFER R TOP EARPHONE THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION
35. ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SECRET MODEL 4 DATE BLOCK SHEET ELECTRONICS SYMBOL MARK OF THE SCHEMETIC L GElectronics LGE Internal Use Only REAR USB OPT REAR USB a PC AUDIO em 4 L PC IN 316 T3 i He E n een ameet 1 COMPONENT 1 T i 5 T ee t ES RC SPDIF JACK SIDE USB OPT SIDE USB 1 _ 5V GENERAL GN CONTACT 45V USB SIDE GN10 SPRING 5 2 co PA 9 1 5 roe SPDIF OUT R42 a uk 22 IRIS vem COMP Pr i 47 JSB OCD zl mE CO
36. ER ENABLE CONTROL ADDR 12 AN SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION 2020110 SECRET Ls ELECTRONICS MODEL DATE THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LGElectronics BLOCK SHEET LGE Internal Use Only i EE TRO STET 1 UI HW 2 UI PORT3 OPT REAR HDMI 2 SIDE HDMI OPT SIDE HDMI spo l JK602 1 E EDID WP NI rN HDMI CEC HDMI CEC THE N SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION ESSENTIAL THAT ONLY MANUFATURES SP CHIE PARTS BE USED FOR SECRET 5 ELECTRONI
37. MP L IN 2 516 T nis oc LESE cL clc zx eum ue E 7705 752207727700 D LR 7 DEP IDEE 1 RS232C ios Eee E 03010L AMODIODE 2 E19 DSUB B 2 E19 DSUB G 2 E18 DSUB THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION 224 4 SECRET Ls ELECTRONICS MODEL a CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC LGElectronics BLOLK Sud Only for training and service purposes LGE Internal Use Only DVB CI SLOT DVB CI TS INPUT 5V GENERAL DVB CI HOST I F TOSHIBA ARSOB _ DVB CI DETECT AR509 IC502 74LVC541A EM BUFFER CI POW
38. Manuals symptom AV1 Scart CVBS No Video Making 2009 2 1 Problem Revision 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported Check the SCART Cable Cheek MAIN DD RIII MAIN B D JK1100 Check Replace MAIN B D JK1100 Video Signal NO NO YES Check MAIN B D C210 Replace Video Signal MAIN B D C210 Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals AV1 Scart RGB No Video Symptom Problem 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported YES Check the SCART Cable YES YES heck MAIN B D C200 RED C202 BLUE MAIN B D C200 C201 C202 Video Signal YES Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom 2 No Video Problem ma 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported YES Check the SCART Cable YES Check MAIN B D R1133 MAIN B D JK1101 Check Replace MAIN B D JK1101 Video Signal NO YES Check MAIN B D C211 Video Signal Replace MAIN B D C211 YES Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded F
39. PECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC CVBS4 S L GElectronics IC100 LVALP LV AUOU AUOU AUOUTR1 SC1_ AUOUTLI AUOUTR2 AUOUTL2 VIDEO_Y Saturn6 No DivX 1 26V VDDC c2044 10 0 1uF 3 3V 3 3V_VDDP c2004 c265 58 250 c Ino 11 015 11 09 1 09 11 11 015 11 62 EXCEPT Bbit FHD 22 8bit FHD 22 22 NI 0 1uF R241 0 1uF R242 a SPDIF QUT 4 711 1009 ELECTRONICS zu 1 26V VDDC 100 LGE3368A Saturn6 No DivX VDDC 970mA VDDP VDDP 102 3mA AVDD AU 36 11mA 0 1uF AVDD_MEMPLL 23 77mA AVDD LPLL 4 69mA AVDD 33 281mA SE 0 03mA 22 96mA MODEL DATE SHEET 2 11 LGE Internal Use Only DDR2 1 8V By CAP Place these Caps near Memory T T T Je 25 T
40. Remote control LGE Internal Use Only 4 Total Assembly line process 4 1 Adjustment Preparation W B Equipment condition CA210 CH 9 Test signal Inner pattern 85IRE Above 5 minutes H run in the inner pattern power on key of adjust remote control Cool 9 300 K 0 285 0 002 Y 0 293 0 002 lt Test Signal gt Medium 8 000 K X 0 295 0 002 Inner pattern Y 0 305 0 002 216gray 85IRE Warm 6 500 X 0 313 0 002 Y 0 329 0 002 Connecting picture of the measuring instrument On Automatic control Inside PATTERN is used when W B is controlled Connect to auto controller or push Adjustment R C POWER ON gt Enter the mode of White Balance the pattern will come out Full White Pattern CA 210 RS 232C Communication Auto control interface and directions 1 Adjust in the place where the influx of light like floodlight around is blocked illumination is less than 10 lux 2 Adhere closely the Color Analyzer CA 210 to the module less than 10 cm distance keep it with the surface of the Module 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 15minutes Using no signal or full white pattern or the others check the back light on COLOR ANALYZER TYPE CA 210 Auto adjustment Map RS
41. T Close to DDR Power Pin IC300 IC100 IC301 5 51 1631 56 LGE3368A Saturn6 H5PS5162FFR S6C SDDR 0101 VREF AR300 BDDR2_A 9 56 56 ADDR2 BDDR2_A 1 1 BDDR2 A 10 AR304 N2 ADDR2_A 9 NB ADDR2 A 12 BDDR2 5 56 ADDR2 A 8 A DDR2 A11 BDDR2 A 11 R325 x A DDR2 A12 BDDR2 A 8 8326 BAO SDDR_BA O 56 ADDR2_BA O BDD E A DDR2 BAL 56 ADDR2 BDD DDR2 BA2 ADDR2 ADDR2 RAS BDDR2 RAS TDDR RAS ADDR2 BDDR2 0051 P 56 IDDR 0051 P LDM 56 ADDR2 DQM BDDR2 DOMO P 56 TDDR DQMO P UDM 56 ADDR2 DOM BDDR2 P 56 TDDR DQMl P LDOS 56 ADDR2 BDDR2_DQSO_N R341 56 TDDR 0050 0005 56 ADDRZ 56 TDDR 0051 ADDR2 D 11 ics ADDR2 0191 56 ADDR2 D 14 D 5 AR312 ET e BDDR2 D 15 F BDDR2 D 8 1 VDDL VDDL THE AN SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND
42. TV Manual com Manuals LCD TV Symptom All Source no Audio Problem Making 2009 2 4 Revision 18 34 26 42LH2000 NO Check Speaker Cable Replace Speaker Cable NO CHECK MAIN B D Replace MAIN B D JK700 or JK701 mno JK700 or JK701 If headphone is connected Speaker sound doesn t work N MAIN B D NO MAIN B D Signal NO MAIN B D PA pi Check P700 Cable Replace MAIN B D IC701 L704 Pin 2 12 PWM Signal Replace MAIN B D IC 701 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD Symptom Digital No Audio Problem Making 2009 2 1 26 42LH2000 32 47LH3000 LH4000 i YES Replace MAIN B D IC 100 Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Downloaded From TV Manual com Manuals Analog TV No Audio Problem end 20 34 26 42LH2000 32 47LH3000 LH4000 LCD TV Symptom Analog TV Video OK Check MAIN B D 231 Signal SIF EG Replace MAIN B D IC100 MAIN B D TU1200 Pin 17 Signal SIF NG Replace MAIN B D TU1200 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom AV1 No Audio Problem Making 2092 1 26 42LH20
43. Tuner soldering or broadcaster Cable or Air I Replace Main B D Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process A Video error Established 5008 3 05 LCD TV mee date symptom dE Color error Revised date Other Module Replace module Check color by input Replace External Input and replace T Con COMPONENT Link Cable i Board RGB LVDS and And Adjust HDMI DVI contact N VCOM condition wur i ud Check error color input mode Check external device and cable External Inp Check Test pattern Replace Main B D RGB Check external E HDMI DVI device and Cable Replace Main B D error cable normal Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process Established Error A Video error Ez 3 05 symptom Vertical Horizontal bar residual image ot external device color error Check color condition by input Check external External Input device Component connection RGB condition HDMI DVI Wee qu replace Link Cable Request repair for external device Replace module Check Test pattern External device screen error Color error Check screen condition by input External Input Component RGB
44. VC 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 24 02 by using DDC2B protocol Check whether written EDID data is correct or not For SVC main Ass EDID have to be downloaded to Insert Process in advance 4 4 EDID DATA 1 All Data HEXA Value 2 Changeable Data Serial No Controlled Data 01 Month Controlled Data 00 Year Controlled check sum LGE Internal Use Only Auto Download After enter Service Mode by pushing ADJ key Enter EDID D L mode Enter START by pushing OK key EZ ADJUST 0 Tool Option 1 Tool Option 2 Tool Options 3 Tool Optiong 4 Country Group 5 ADC Calibration 6 White Balance 7 Test Pattern EDID D L 9 Sub B C 10 V Com 11 P Gamma Edid data and Model option download RS232 Item CMD 1 2 Download A A O When transfer the Mode In Mode In Carry the command Download A E 00 10 Automatically Download The use of a internal pattern Manual Download Caution 1 Use the proper signal cable for EDID Download Analog EDID Pin3 exists Digital EDID Pin3 exists Never connect HDMI amp D sub Cable at the same time Use the proper cables below for EDID Writing Download HDMI1 separately because
45. al 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 1 W keep the resistor 10mm away from PCB Keep wires away from high voltage or high temperature parts Before returning the receiver to the customer always perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the measured resistance shou
46. any electrostatic charge on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test Copyright 02010 LG Electronics Inc All right reserved 4 Only for training service purposes Downloaded From TV Manual com Manuals 2 After removing an electrical assembly eguipped 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
47. device external device Check and fix external device Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process D General Function Problem Established 05 LCD TV Error date symptom Remote control amp Local switch checking Revised date o 1 Remote control R C operating error Check RIC itself Cable connection Operation 1 Connector solder Check R C Operating When turn off light in room If R C operate Explain the customer cause is interference from light in room Check amp Repair Check R C Cable connection Operation Connector solder Move Power problem Section Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals 10 13 Replace Main B D Check 5V Check IR On Main B D Output signal Check 5v on Power B D Repair Replace Replace Power B D or IR B D Replace Main B D Power B D don t have problem Replace Main B D 1 as Check Key I Key tool Output signa Repair Replace Local switch B D LGE Internal Use Only Standard Repair Process Error D Function error Established 5008305 date External device recognition error Revised date Check technical information _ Technic Replace Main B D
48. e 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 boa
49. ect Revised date error damao Replace cabinet Replace remote controller Replace stand Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Repair Process Index Trouble shooting by input block Component level check 00 1 EN iv s EN cw EN ower EN EN 9 _ AV Component RGB HDMI PC HDMI DTV AV I Component RGB HDMI PC HDMI DTV 21 26 AV Audio out No Audio Headphone amp Y SPDIF 1 USB Remocon Problem USB no connect Remocon 31 33 EN Intelligent Sensor Intelligent Sensor PENNE Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Downloaded From TV Manual com Manuals LCD TV Symptom Power Up Boot Fail 1 34 26 42LH2000 P800 Pin 7 10 Check Power connector Voltage Level 5V 7 Check Power connector IR Replace Power oar 32 47LH3000 LH4000 P800 Pin 2 Voltage level 5V han Replace MAIN B D 0801 P800 Pin 13 14 12V cC P800 Pin 417 18 24V eplace Power Bo MAIN B D L803 3 3V Replace MAIN B D IC801 MAIN B D L813 1 26V 2 Replace MAIN B D IC805 MAIN B D L805 3 3V Replace MAIN B D IC806 NO heck MAIN B D X100 Cl
50. es Downloaded From TV Manual com Manuals Contents of LCD TV Standard Repair Process No Error symptom High category Error symptom Mid category 1 No video Normal audio No video No audio A Video error Video error video lag stop Color error Vertical Horizontal bar residual image light spot external device color error No power B Power error Off when on off while viewing power auto on off No audio Normal video C Audio error Wrecked audio discontinuation noise No response in remote controller key error 10 recording error memory error D Function error External device recognition error 11 12 Circuit noise mechanical noise First of all Check whether there is SVC Bulletin in GCSC System for these model Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process Emor A Video error 2008 3 05 ate LCD TV symptom No video Normal audio Revised date First of all Check whether all of cables between board is inserted properly or not B D lt gt Power B D LVDS Cable Speaker Cable IR B D Cable No video Check Back Light Check Power Normal audio i On with naked eye Board 12v 5v etc Replace Main Board Replace T con Board or module Move to No And Adjust VCOM video No audio Repair Power Board or parts Precaution Always check
51. ht Please refer to the A21 Page Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process Established Error B Power error 2008 3 05 Gon Ena N Replace Power B D symptom Off when on off while viewing power auto on off Check outlet Check A C code Check for 3 wave length Fix A C code amp Outlet and describe 3 wave length Please refer to the all cases which can be displayed on power off mode Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals Revised date Check Power Off Mode Replace Main B D If Power Off mode is not displayed Check Power B D voltage Replace Main B D Caution Check and fix exterior Replace Power B D of Power B D Part 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
52. ifted level HIGH VGH Low VGL GVDD ODD Me Level Shifter VDD EVEN EUR VDD ODD FRC 35 DDR D 0 15 CLK1 6 DDR_A_A 0 12 TCON with FRC DDR 512 533MHz VDD VGH VGL VGH MST7327N sz LVDS 108 DDR B A 0 12 IC20 IC101 FRC IIC amp In different Left mini LVDS 8Bit Right mini LVDS 8Bit LVDS 10Rit DC DC Converter BD9130 1 gt FRC 1 8 VCC Panel 12V Multi Channel DC DC Converter From Main TPS 65161 Board IC401 Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Downloaded From TV Manual com Manuals Block diagram M S T Con Block Only for 42 47LH4000 M S Main B D T con B D To Right LCD Panel VDD P Gamma IC BUF16821 IC402 FRC P gt ICON with FRC FRC_1 26 MST7327N LVDS 10Bi IC10 1 FRC IIC FRC Reset Right mini LVDS LVDS 10BRitY FRC Reset DC DC Converter FRC 1 26 BD9130 IC301 Panel 12V Multi Channel DC DC Converter From Main TPS 65162 LDO 1 8 Board IC401 SC4215 1 303 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purpos
53. ight reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals suom Making 2009 2 1 19 22LH2000 P801 Pin 1 2 15V gt joe Replace Power Board NO 2 5 P801 Pin 9 Voltage level gt Replace 870 0802 YES BD 11300 12V Replace MAIN B D 0806 YE Check a Cable Replace Main Board NO Replace LVDS Cable Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals leu nu wars C ympto Digital TV Video Problem Revision 26 42LH2000 32 47LH3000 LH4000 ne N MAIN B D IC804 Pin 2 1 2V Replace MAIN B D IC804 MAIN R1210 Clock gt Replace MAIN B D TU1200 NO Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals TV GROTON eee 26 42LH2000 32 47LH3000 LH4000 YES Replace MAIN B D IC808 YES Replace MAIN B D IC809 YES MAIN B D IC804 Pin 2 1 2V 2 MAIN B D R1210 Clock Replace MAIN B D TU1200 NO Replace MAIN B D IC804 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com
54. ld be between 1 and 5 2 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 Copyright 2010 LG Electronics Inc All right reserved 3 Only for training and service purposes Downloaded From TV Manual com Manuals 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 5 K 10 watt resistor in parallel with a 0 15 uF 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 5 mA 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 Good Earth Ground such as WATER PIPE CONDUIT etc When 25 is impressed between Earth 2nd Ground for 1 second Resistance must be less than 0 1 O Base on Adjustment standard To Instrument s 0 15 uF exposed METALLIC PARTS
55. o Signal NO 9r Sr 55 Replace MAIN BD IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom HDMI 1 3 All No Video Problem Making 2009 21 rors 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported YES Check the HDMI Cable YES Check the ADJUST MENU Download EDID EDID OK Refer to Adjustment Spec YE Replace AIN B D IC107 HDCP KEY NO Replace MAIN B D IC 100 HDMI1 ALL MODELS HDMI2 Except for 19 22LH20 HDMI3 Except for 19 22LU40 19 22LU50 19 22LH20 Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Downloaded From TV Manual com Manuals ico TV esses 2 No Video maang Resin 1784 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported ves Check the HDMI Cable MAIN B D JACK Check JK600 HDMI1 JK601 HDMI2 JK602 HDMI3 Replace MAIN B D IC 100 This case is that HDMI Video doesn t display at the some HDMI input not all HDMI1 ALL MODELS HDMI2 Except for 19 22LH20 HDMI3 Except for 19 22LU40 19 22LU50 19 22LH20 Copyright O 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Downloaded From
56. ock Replace MAIN IC100 12MHz NO Replace MAIN B D 102 Replace MAIN B D 1 103 Replace MAIN B D NAND FLASH NO Serial Flash NO _ 1300 1 301 DDR2 Memory yo Replace MAIN B D IC100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD TV Symptom Power Up Boot Fail 2134 19 22LH2000 P801 Pin 5 6 Check Power connector Voltage Level 5V 2 OK YES Replace rower Board YES P801 Pin 1 2 15V Replace Power Board MAIN B D L803 3 3V Replace MAIN B D IC801 Replace MAIN B D IC805 S Replace MAIN BD IC806 YES Check MAIN B D X100 Clock T Replace MAIN B D IC100 NO Replace B D IC102 Replace MAIN BD 103 Replace MAIN B D NAND FLASH Serial Flash IC300 IC301 DDR2 Memory gt BERE Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals LCD symptom Making 2009 2 1 Revision 384 26 42LH2000 32 47LH3000 LH4000 P800 Pin 13 14 12V Check Power connector v BENE YES P800 Pin 420 Voltage level 2V 1 Replace MAIN B D Q802 YES MAIN BD 11300 12V Replace MAIN B D Q806 NO YES gt Replace Main Board YES Replace LVDS Cable Copyright O 2009 LG Electronics Inc All r
57. of Recording POWEROFF SWDOWN Power off by S W Download POWEROFF UNKNOWN Power off by unknown status except listed case Abnormal POWEROFF ABNORMAL 1 Power off by abnormal status except CPU trouble CPUABNORMAL Power off by CPU Abnormal 7 LGE Internal Use Only Standard Repair Process Error C Audio error 2008 3 05 ate LCD TV symptom audio Normal video Revised date Check user Check audio Bt menu 20V or 24V of Speaker off Power Board Cancel OFF and describe Replace Power Board and repair parts No audio Screen normal Check Speaker disconnection Disconnection Replace MAIN Board Replace Speaker Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Standard Repair Process Error C Audio error 2008 3 05 ate LCD TV symptom Wrecked audio discontinuation noise Revised date Wrecked audio discontinuation noise is same after Check input signal compared to No audio Check and replace speaker and connector Check audio Voltage 20V or 24V Check input signal RF External Input signal When RF signal is not received Request repair to external Cable ANT provider In case of External Input Connect and check signal error other external Check and fix
58. rd 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 02010 LG Electronics Inc All right reserved Only for training and service purposes Downloaded From TV Manual com Manuals 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
59. rom TV Manual com Manuals symptom AV3 CVBS No Video Problem 26 42LH2000 32 47LH3000 LH4000 Check Signal format Is it supported Check the CVBS Cable YES Dd MAIN B D JK402 Check Replace MAIN B D JK402 Video Signal NO NO YES Check MAIN B D C217 5 Video Signal Replace MAIN B D C217 YES Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals 26 42LH2000 32 47LH3000 LH4000 YES Check the SCART Cable YES Check Spec Refer to User Manual Is it supported Check MAIN B D C1107 YES Check MAIN B D R1205 Check the Trouble Shooting Guide Video Signal NO Analog TV No video YES Replace MAIN BD 01205 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Symptom AV2 No Video Out Problem ma 26 42LH2000 32 47LH3000 LH4000 Check Spec Refer to User Manual Is it supported YES Check the SCART Cable Check MAIN B D C1122 Video Signal MAIN B D JK1101 Check YES Replace MAIN B D IC 100 Copyright O 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals Sumo Component No Video Making 2009 2 1
60. sage MStar ISP Utility 4 2 7 G Fish D C Flash Flash 2 Flash3 liv Read File HDCP Key I Checksum Key IP Restore Data Program l Verify 1 7 Multi Flashes 17 Erase Device Exit ISP Ali Chip File Area Erase Area First 57 KBytes Partial Erase 1 ESETEI Elapsed Time 2 USB 390KHz 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 LGE Internal Use Only 4 Updating is staring 5 Fishing the version uploading you have to put USB stick and AC Power off 6 After putting AC Power on and check updated version on your TV If downloading version is more high than your TV have TV can lost all channel data In this case you have to channel recover if all channel data is cleared you didn t have a DTV ATV test on production line After downloading have to adjust Tool Option again 1 Push 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 Copyright 2010 LG Electronics Inc All right reserved Only for training
61. t 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 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 technigue should be used to remove and replace the IC When working with boards using the familiar round hole use the standard technigue 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 Remov
62. tick or comparable non abrasive applicator 10 96 by volume Acetone and 90 96 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 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
63. tronics Inc All right reserved 7 LGE Internal Use Only Only for training and service purposes Downloaded From TV Manual com Manuals ADJUSTMENT INSTRUCTION MStar ISP va 1 13 olx 1 Application Range This specification sheet is applied to all of the LCD TV with LD91A chassis 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 25 5 Relative humidity 65 10 96 Input voltage 220 V 60 Hz 6 Adjustment equipments Color Analyzer CA 210 or CA 110 DDC Adjustment Jig equipment SVC remote controller 7 Push The IN STOP key For memory initialization 1 Software version up 1 After downloading S W by USB TV set will reboot automatically 2 Push In stop key 3 Push Power on key 4 Function inspection 5 After function inspection Push n stop key Case2 Function check at the assembly line 1 When TV set is entering on the assembly line Push In stop key at first 2 Push Power on key for turning it on gt If you push Power on key TV set will recover channel information by itself 3 After function inspection Push In stop key
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