LG Electronics 55LA970V/W/9-ZA Flat Panel Television User Manual
Contents
1. 2013 LG Electronics Inc All rights reserved Only for training and service purposes 15 2 Check the key download for transmitted command RS232 ci 00 10 CMD 1 Data 0 L 3 Result value Normally status for download OKx Abnormally status for download NGx 3 6 2 Check the method of Cl key value RS232 1 Into the main ass y mode RS232 aa 00 00 CMD 1 Data 0 2 Check the mothed of Cl key by command RS232 ci 00 20 CMD 1 L Data 0 L i 3 Result value i 01 OK 1d1852d21c1ed5dcx CI Key Value 3 7 WIFI MAC ADDRESS CHECK 1 Using RS232 Command HfeqkHz Vfeq H AILI Set ID 20 Cr OIIKIX or NG 2 Check the menu on in start UTT 4 APP History Ver 25682 Eye Q Gain 5000 PQL DB LGD_ALEF SI2173_XXXXXX LGE Internal Use Only 4 Manual Adjustment ADC adjustment is not needed because of OTP Auto ADC adjustment 4 1 EDID The Extended Display Identification Data DDC Display Data Channel download 4 1 1 Overview It is a VESA regulation A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input It is a realization of Plug and Play 4 1 2 Equipment Since embedded EDID data is used EDID download JIG HDMI cable and D sub cable are not need Adjustment remote control 4 1 3 Download method 1 Press ADJ key on the Adjustment remote control then select 12 EDID D L By pressin2. gt DVB C Symbolrate 4 0Msymbols s to 7 2 Msymbols s Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S S2 symbolrate DVB S2 8PSK QPSK 2 45 Msymbol s DVB S QPSK 2 45 Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 input Voltage AC 100 240 V 50 60 Hz _ Copyright 2013 LG Electronics Inc All rights reserved f LGE Internal Use Only Only for training and service purposes 5 External input format 5 1 2D Mode 1 Component input Y CB PB CR PR O No Reto Herea vrea SS e rass as loo sows amp Daora 495 eo how Co o o foo how a4 aozo 6 5 8 Thowa 2 HDMI Input PC DTV mome S o 2 7240 3149 700 283 D0 10 3 emus 3140 599 251 VESAVGN O 4 soso arso eost 400 VESASVON O 5 1024768 4830 600 650 VESAXGN o 6 sea 5438 6003 80 VES lo 7 i914 6398 6000 108 VESASXGN O 8 130768 arna 6005 855 VESAWXGN lo 9 ie 6 5 600 1485 WUXGA Reduced Blanking O mro Jo 4 390216 5620 250 2 70 UbD 12 seor sao 20 270 U HDMI DTV 720 480 31 47 86 27 027 SDTV 480P EE 720 480 31 47 59 94 27 00 SDTV 480P EE 3 1280 720 45 00 60 00 74 25 HDTV 720P m 1280 720 44 96 59 94 74 176 HDTV 720P MEN 1920 1080 33 75 60 00 74 25 HDTV 10801 EN 1920 1080 33 72 59 94 14 176 HDTV 10801
3. 1920 1080 67 500 8 148 50 HDTV 1080P aM 8 1920 1080 67 432 59 939 148 352 HDTV 1080P EI 9 1920 1080 27 000 24 000 74 25 HDTV 1080P BEEN 1920 1080 26 97 23 976 74 176 HDTV 1080P EE 1920 1080 33 75 30 000 74 25 HDTV 1080P EE 1920 1080 33 71 29 97 74 176 HDTV 1080P EE 3840 2160 30 00 297 00 UDTV 2160P EE 3840 2160 56 25 25 00 297 00 UDTV 2160P EE mE 3840 2160 24 00 297 00 UDTV 2160P Copyright 2013 LG Electronics Inc All rights reserved os LGE Internal Use Only Only for training and service purposes 5 2 3D Mode 1 RF Input 3D ADPOLL mode manually HD DTV i 2D to 3D i 576P Side by Side Half dd 576l Top amp Bottom SD ATV CVBS SCART ae 2 RF Input 3D alai mode ae Side by Side Half Frame Compatible Top amp Bottom 3 HDMI 1 3 n supported mode manually H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode 720 576 31 25 SDTV 576P 2D to 3D Side by Side Half Top amp Bottom Checker Board Frame Sequential Row 12807720 45 00 60 00 74 25 HDTV 720P Interleaving Column Interleaving 1280 720 37 500 74 25 HDTV 720P 1920 1080 33 75 60 00 74 25 HDTV 1080 2D to 3D Side by Side Half Top amp Bottom 6 1920 1080 28 125 50 00 74 25 HDTV 10801 192071080 27 00 24 00 74 25 HDTV 1080P 5p to 3D Side by Side Half Top amp Bottom 8 1920 1080 28 12 25 7425 HDTV 1080P Checker Board Row Interleaving Column 9 1920 1080 33 75 30 00 74 25 HDTV 108op Int
4. 50 60 Hz 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 Model General Specification DTV amp Analog Total 37 countries DTV MPEG2 4 DVB T 30 countries Germany Netherland Switzerland Hungary Austria Slovenia Bul garia France Spain Italy Belgium Russia Luxemburg Greece Czech Croatia Turkey Moroco Ireland Latvia Estonia Lithuania Poland Portugal Romania Albania Bosnia Serbia Slovakia Be ralus DTV MPEG2 4 DVB T2 8 countries UK Ireland Sweden Denmark Finland Norway Ukraine Kaza khstan Russia DTV MPEG2 4 DVB C 37 countries Germany Netherland Switzerland Hungary Austria Slovenia Bul garia France Spain Italy Belgium Russia Luxemburg Greece Czech Croatia Turkey Moroco lreland Latvia Estonia Lithuania Poland Portugal Romania Albania Bosnia Serbia Slovakia Be EU PAL Market 36Countries CIS ralus UK Sweden Denmark Finland Norway Ukraine Kazakhstan 1 Market l Morocoo Africa DTV MPEG2 4 DVB S S2 30 countries Germany Netherland Switzerland Hungary Austria Slovenia Bul garia France Spain Italy Belgium Russia Luxemburg Greece Czech Croatia Turkey Moroco Ireland Latvia Estonia Lithuania Poland Portugal Rom
5. First decrease B so make x a little more than the target Mode m Temp wy li Adjust x value by decreasing the G 0 002 olor TT 13000 K 0 0000 0 285 0 002 0 293 0 002 9300 K 0 0000 0 310 0 002 0 325 0 002 6500 K 0 0000 Copyright 2013 LG Electronics Inc All rights reserved 18 LGE Internal Use Only Only for training and service purposes 4 2 8 EDGE LED White balance table 1 EDGE LED module change color coordinate because of aging time 2 Apply under the color coordinate table for compensated aging time 3 Normal line Edge Direct Gumi Mar Dec amp Global a NEN NC4 0 eee Re SERE ee 2 ss 280 265 204 sp 919 340 3 so zm 292 30r orr 339 6 3649 274 274 288 297 313 329 8 80119 272 271 286 204 311 326 9 Over120 271 270 285 293 310 325 4 Aging Chamber aaa NC4 0 Se y Min ee Lux i s REB RCBGEOUR 2 ew ze 200 ze f 208 18 235 4 21 30 269 272 283 295 308 327 8 81 119 264 261 278 284 303 316 9 Over 120 264 260 278 283 303 315 5 Gumi winter table Jan Fab Gumi producing model use only Normal line NC4 0 ab arabe e eo 5 28 ze s 9 aas 6 s49 274 zr5 288 208 313 330 8 80119 272 271 286 294 311 326 9 Over 120 271 270 285 293 310 325
6. 1080P Copyright 2013 LG Electronics Inc All rights reserved a T LGE Internal Use Only Only for training and service purposes 5 HDMI PC Input 3D 3D supported mode manually H freq kHz V freg Hz Pixel clock MHz 3D input proposed mode 2D to 3D Side by Side half 1360 768 47 71 85 eee py Sa LADT 769P Top amp Bottom S 2D to 3D Side by Side half Top amp Bottom Checker Board 3 1920 1080 67 500 148 50 Single Frame Sequential HDTV 1080P Row Interleaving Column Interleaving 54 24 4 296 703 2D to 3D 3840 2160 56 25 25 297 HDTV 2160P Top amp Bottom half 67 5 30 296 703 Side by Side half 640 350 720 400 3840 2160 2D to 3D 640 480 800 600 1152 864 6 Component Input 3D 3D supported mode manually N O H freq kHz V freq Hz Pixel clock 3D input proposed mode 1 1280 720 74 25 2D to 3D Side by Side half Top amp Bottom HDTV 720P 5 Sr 2D to 3D Side by Side half Top amp Bottom 7 1920 1080 67 500 60 14850 2Dto3D Side by Side half Top amp Bottom s 1920 1080 7 432 5064 148 352 2D to 9 Side by Sie al Top amp Botom HDTV 10807 o teneo 27 000 24 000 7425 20 to 9 Side by Side al Top amp Botom HDTV 10807 N 4 0 u A u AA ee eee SAN 7 USB DLNA Movie 3D 3D supported mode manually H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode OVEK TOR KAON 2D to 3D Side by Side
7. 2 Designation Protocol Set ACK 1 Because this is not a hot chassis it is not necessary to Enter adj mode a 00 OKOOx use an isolation transformer However the use of isolation qum b 00 OK04x Adjust 480i 1080p Comp1 transformer will help protect test instrument xb 00 06 b00 OKO06x Adjust 19201080 SCART RGB 2 Adjustment must be done in the correct order Begin adj 3 The adjustment must be performed in the circumstance of Reumair OKx Case of Success NGx Case of Fail 25 C 5 C of temperature and 65 10 of relative humidity if there is no specific designation main 4 The input voltage of the receiver must keep AC 100 240 TA 8 ad 0020 000000000000000000000000007c007b006dx V 50 60 Hz sub Sub l ad 0021 000000070000000000000000007c00830077x 5 The receiver must be operated for about 5 minutes prior to MM l NG 03 00x Fail the adjustment when module is in the circumstance of over NG 03 01x a 15 Confirm adj ad 00 99 NG 03 02x Fail OK 03 03x Success In case of keeping module is in the circumstance of 0 C it should be placed in the circumstance of above 15 C for 2 Ref ADC Adj RS232C Protocol_Ver1 0 hours 3 Adj order In case of keeping module is in the circumstance of below aa 00 00 Enter ADC adj mode 20 C it should be placed in the circumstance of above 15 xb 00 04 Change input source to Component1 480i amp C for 3 hours 1080p ad 00 10 Adjust 480
8. 33 72 33 75 59 94 60 74 18 74 25 Side by side half Primary HDTV 10801 Frame packing Primary HDTV 10801 67 432 67 50 59 94 60 148 35 148 5 ns mus HDTV 10801 33 72 33 75 59 94160 148 35 148 5 Side by side Full HDTV 10801 Top and Bottom Secondary HDTV 1080 ied diu mem Side by side half Primary HDTV 10801 28 125 50 00 148 5 Side by side Full HDTV 10801 Top and Bottom Primary HDTV 1080P E e sem Side by side half Primary HDTV 1080P Frame packing Primary HDTV 1080P 43 94 54 23 97 24 148 35 148 5 Field alternative HDTV 1080P 4 1920 1080 Top and Bottom Primary HDTV 1080P epus mo dini ES Side by side half Primary HDTV 1080P Frame packing Primary HDTV 1080P PES EN a E Line alternative HDTV 1080P 28 12 33 Side by side Full HDTV 1080P O N on Top and Bottom Primary HDTV 720P eee didi um Side by side half Primary HDTV 720P Frame packing Primary HDTV 10801 mee DES s Field alternative HDTV 10801 26 97 27 23 97 24 148 35 148 5 32 Side by side Full HDTV 1080P Top and Bottom Secondary HDTV 1080P MM E Side by side half Secondary HDTV 1080P Frame packing Secondary HDTV 1080P 67 432 67 5 29 976 30 00 148 35 148 5 NM urean HDTV 1080P 33 716 33 75 29 976 30 00 148 35 148 5 34 Side by side Full HDTV 1080P Top and Bottom Primary HDTV 1080P 99 299 ae Side by side half Secondary HDTV 1080P Top and Bottom Primary HDTV 1080P OE oe a ee Saas Side by side half Secondary HDTV
9. 96 99 96 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 eas ily 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 dam age 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 Alter natively obtain and wear a c
10. adjustment RS 232C o CMD DATA Explantion wo 00 o0 Bagin Whe Balance aajustnent wb 00 10 Gain adjustmentinternal white pattern wb 00 1f Gain adjustment completed wb 00 20 Offset adjustment ntemal white pattem wb 00 2f Ofsetadustmentcompete End White Balance adjustment wb ff internal pattern disappears Ex wb 0000 gt Begin white balance auto adj wb 00 10 gt Gain adj ja 00 ff gt Adj data jb 00 cO wb 00 1f Gain adj completed wb 00 20 Start wb 00 2f end Off set adj wb 00 ff End white balance auto agj Adj Map Nei item Command Data Range Default lower caseASCII Hex Decimal ewe ovoz pan wa j fg 00 CO LGE Internal Use Only 4 2 6 Adj method How to adjust 1 Auto adj method 1 If G gain is adjusted over 172 and R gain and B gain 1 Set TV in adj mode using POWER ON key less than 192 Adjust is O K 2 Zero calibrate probe then place it on the center of the 2 If G gain is less than 172 increase G gain by up to Display 172 and then increase R gain and B gain same 3 Connect Cable RS 232C to USB amount of increasing G gain 4 Select mode in adj Program and begin adj 3 If R gain or B gain is over 255 Readjust G gain less 5 When adj is complete OK Sign check adj status pre than 172 Conform to R gain is 255 or B gain is 255 mode Warm Medium Cool 6 Remove probe and RS 232C cable to comp
11. 00 bps Connect RS 232C Signal to USB Cable to USB Write Serial number by use USB port Must check the serial number at Instart menu 3 5 2 Method amp notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Serial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded by OTA or service man sometimes model name or serial number is initialized Not always It is impossible to download by bar code scan so It need Manual download 1 Press the Instart key of Adjustment remote control 2 Go to the menu 7 Model Number D L like below photo 3 Input the Factory model name ex 47LM960V ZB or Serial number like photo Model Number D L SKJY1107 4 Check the model name Instart menu Factory name displayed ex 47LM960V ZB 5 Check the Diagnostics DTV country only Buyer model displayed ex 47LM960V ZB 3 6 CI Key checking method Check the Section 3 2 Check whether the key was downloaded or not at In Start menu Refer to below gt Check the Download to Cl Key value in LGset 3 6 1 Check the method of Cl Key value 1 Check the method on Instart menu 2 Check the method of RS232C Command 1 Into the main ass y mode RS232 aa 00 00 A a 9 9 Copyright
12. A uU K North Latin America http aic lgservice com Y Europe Africa http eic lgservice com Asia Oceania http biz lgservice com J Life s Good LED IV CHASSIS LD34N MODEL 55LA970V W 9 55LA970V WI9 ZA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL P NO MFL67733212 1308 REVOO Printed in Korea CONTENTS Med up 2 SAFELY PRECAUTIONS zisssivimiminiubeniqdis Ex dat uic CHIEN RIRSERRR RET IRIURE 3 SERVICING PREGCAUTIONO iiniidresiakdish iatis vaxcAMKUrUN EN lis sKudUE Exe Pur bUreEY 4 SPECIFICATION m 6 ADJUSTMENT INSTRUC TION zinxusussussxWaxzdivtiiuesasdsiF Etudiant dE urC sm ErEE 13 EXPLODED VIEW isiin rae aaa aeara Ngeusi 23 SCHEMATIC CIRCUIT DIAGRAM eene nnne Copyright O 2013 LG Electronics Inc All rights reserved 95 LGE Internal Use Only Only for training and service purposes SAFETY PRECAUTIONS 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 Shock Fire or other Hazards Do not modify the original design without permission of manufactu General Guidance An isolation Transformer shou
13. Half Top amp Bottom interlaced 2D to 3D Side by Side Half Top amp Bottom Checker Board 50 60 Over 704x480 Row Interleaving Column Interleaving Frame Sequential m progressive 2D to 3D Side by Side Half Top amp Bottom Checker Board others Row Interleaving Column Interleaving Copyright 2013 LG Electronics Inc All rights reserved 211 LGE Internal Use Only Only for training and service purposes 8 USB DLNA Photo 3D 3D supported mode manually H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode 9 USB DLNA 3D 3D supported mode automatically H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode Side by Side Half Top amp Bottom Checker ee Pure s Board MPO Photo JPS Photo 10 Miracast Widi 3D supported mode manually two sore 0 s s wowowp 308 aos 8639 m Remark 3D Input mode No Side by Side Top amp Bottom Checker board ve Fine prec s PON 2D to 3D Sequential Packing Interleaving Interleaving HHEHENEN m NI Copyright 2013 LG Electronics Inc All rights reserved 212 LGE Internal Use Only Only for training and service purposes ADJUSTMENT INSTRUCTION 1 Application Range 3 1 3 Adjustment This specification sheet is applied to all of the LED TV with 1 Adjustment method LD34N chassis Using RS 232 adjust items in the other shown in 1259 9 2 Adj protocol
14. LG Electronics Inc All rights reserved Only for training and service purposes 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or lift off the board The following guidelines and procedures should be followed when ever 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 connec tions 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 defec
15. Probe location c If R gain or B gain is over 255 Readjust G gain less Color Analyzer CA 210 probe should be within 10 cm than 172 Conform to R gain is 255 or B gain is 255 and perpendicular of the module surface 80 100 5 Adjust two modes Medium Warm Fix the one of R G B 3 Aging time gain to 192 default data and decrease the others After Aging Start Keep the Power ON status during 5 6 Adjustment is completed Exit adjust mode using EXIT Minutes key on Remote control In case of LCD Back light on should be checked f internal pattern is not available use RF input In EZ Adj using no signal or Full white pattern menu 6 White Balance you can select one of 2 Test pattern ON OFF Default is inner ON By selecting OFF 4 2 7 Reference White balance Adj coordinate and you can adjust using RF signal in 206 Gray pattern color temperature Luminance 216 Gray CASE Cool Standard color coordinate and temperature using CS 1000 First adjust the coordinate far away from the target over 26 inch value x y 1 X y gt target Temp i Decrease the R G 2 x y lt target m _ 13000K 0 0000 i First decrease the B gain 0 285 0 293 9300 K 0 0000 3 X gt target y lt target i First decrease B so make y a little more than the target 0 310 0 325 6500 K 0 0000 li Adjust x value by decreasing the R Standard color coordinate and temperature using CA 210 CH 18 4 x lt target y gt target i
16. aging chamber NC4 0 oe eae ioe aa a Der aD 6 4150 266 205 280 288 305 320 8 81 19 264 261 278 284 303 316 9 Over 120 264 260 278 283 303 315 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 19 4 3 Local Dimming Function Check Step 1 Turn on TV Step 2 Press TILT key on the Adj R C Step 3 At the Local Dimming mode module Edge Backlight moving left to right Back light of IOP module moving Step 4 confirm the Local Dimming mode Step 5 Press exit key LEIS LU qj 4 Local Dimming Demo Edge LED Model 4 4 Magic Motion Remote control test 1 Equipment RF Remote control for test IR KEY Code Remote control for test 2 You must confirm the battery power of RF Remote control before test recommend that change the battery per every lot 3 Sequence test 1 if you select the Start Mute key on the Adjustment remote control you can pairing with the TV SET 2 You can check the cursor on the TV Screen when select the OK key on the Adjustment remote control 3 You must remove the pairing with the TV Set by select OK key Mute key on the Adjustment remote control for 5 seconds 4 5 3D function test Pattern Generator MSHG 600 MSPG 6100 Support HDMI1 4 HDMI mode NO 872 pattern No 83 O K 1 Please input 3D test pattern like below 2 When 3D OSD appear automat
17. ain 1 Push IN START key in service remote control 2 Select Tool Option 1 and push OK key 3 Punch in the number Each model has their number Copyright 2013 LG Electronics Inc All rights reserved 22 Only for training and service purposes 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 Dual Play 8 r mm a 4 TUE C 8 S S S LONER 4g Copyright 2013 LG Electronics Inc All rights reserved 23 LGE Internal Use Only Only for training and service purposes LG Life s Good
18. ania Albania Bosnia Serbia Slovakia Be ralus UK Sweden Denmark Finland Norway Ukraine Kazakhstan Supported satellite 29 satellites ABS1 75 0E AMOS 4 0W ASIASATS 105 5E ASTRA1LHMKR 19 2E ASTRA2ABD 28 2E ASTRA3AB 23 5E ASTRA4A 4 8E ATLANTICBIRD2 8 0W ATLANTICBIRD3 5 0W BADR 26 0E EU ROBIRD3 33 0E EUROBIRDYA 9 0E EUTELSATW2A 10 E EU TELSATW3A 7 0E EUTELSATW4W7 36 0E EUTELSESAT 16 0E EXPRESSAM1 40 0E EXPRESAM3 140 0E EXPRESSAM33 96 5E HELLASAT2 39 0E HISPASAT1CDE 30 0W HOTBIRD 13 0E INTELSAT10 amp 7 68 5E INTELSAT15 85 2E INTELSAT904 60 0E NILESAT 7 0W THOR 0 8W TURKSAT 42 0E YAMAL201 90 0E Copyright 2013 LG Electronics Inc All rights reserved LGE Internal Use Only Only for training and service purposes Broadcasting system 1 PAL BG DK I I 2 SECAM L L DK BG 3 DVB T T2 C S S2 1 Digital TV VHF UHF C Band Ku Band 2 Analogue TV VHF E2 to E12 UHF E21 to E69 CATV S1 to S20 HYPER S21 to S47 Program coverage DVB T Guard Interval Bitrate Mbit s 1 4 1 8 1 16 1 32 Modulation Code Rate QPSK 1 2 2 3 3 4 5 6 7 8 16 QAM 1 2 2 3 3 4 5 6 7 8 64 QAM 1 2 2 3 3 4 5 6 7 8 DVB T2 Guard Interval Bitrate Mbit s 1 4 1 8 1 16 1 32 1 128 19 128 19 256 Modulation Code Rate QPSK 1 2 2 5 2 3 3 4 5 6 Receiving system SEN COEM ud P IFOAM TZ A A ID l i 64 QAM 1 2 2 5 2 3 3 4 5 6 256 QAM 1 2 2 5 2 3 3 4 5 6
19. en handling unpackaged replace ment 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 suf ficient to damage an ES device General Soldering Guidelines 1 Use a grounded tip low wattage soldering iron and appropri ate 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 component lead until the solder melts c Quickly move the soldering iron tip to the junction of the component lead and the printed circui
20. ep power on status don t power off 4 2 2 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time 1 After Aging Start Keep the Power ON status during 5 Minutes 2 In case of LCD Back light on should be checked using no signal or Full white pattern 4 2 3 Equipment 1 Color Analyzer CA 210 LED Module CH 14 2 Adjustment Computer During auto adj RS 232C protocol is needed 3 Adjustment Remote control 4 Video Signal Generator MSPG 925F 720p 216 Gray Model 217 Pattern 49 Only when internal pattern is not available Color Analyzer Matrix should be calibrated using CS 100 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 4 2 4 Equipment connection MAP Color Analyzer RS 232C Pattern Generator Signal Source If TV internal pattern is used not needed 4 2 5 Adj Command Protocol Command Format START 6E A 50 A LEN A J03 A CMD A 00 A JVAL A CS STOP LEN Number of Data Byte to be sent CMD Command VAL FOS Data value CS Checksum of sent data A Acknowledge Ex Send JA 00 DD Ack A 00 okDDX RS 232C Command used during auto
21. ered 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 precau tions 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 explo sion 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
22. erleaving 1920 1080 faa 50 60 00 e 5 HDTV 1080P 2D to 3D Side by Side Half Top amp Bottom Checker Board Single Frame Sequential 11 192071080 56250 250 M88 0 5 HDTV 1080P Row Interleaving Column Interleaving 1 95 23 976 297 00 5400 00 296 703 3840 2160 56 25 25 00 297 00 HDTV 2160P_ 22 to SD Top amp Bottom half Side by Side half 61 43 29 970 297 00 30 00 296 703 Copyright 2013 LG Electronics Inc All rights reserved 9 LGE Internal Use Only Only for training and service purposes 4 HDMI 1 4b 3D supported mode automatically H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode 31 469 31 5 Ce d DE 31 469 31 5 3146991 rout en OP aan dul fier sz 31 469 31 5 59 94 60 54 54 06 Side by side Full SDTV 480P Top and Bottom Secondary SDTV 576P puree Megs Side by side half Secondary SDTV 576P 50 54 17 18 Frame packing Secondary SDTV 576P Line alternative SDTV 576P 31 25 17 18 Side by side Full SDTV 576P Top and Bottom Primary HDTV 720P dou pum Side by side half Primary HDTV 720P 1280 720 720 576 148 5 19 Frame packing Primary HDTV 720P Field alternative HDTV 720P 37 500 148 5 Side by side Full HDTV 720P NO Se N N Za Frame packing Primary HDTV 720P 89 91 90 59 94 60 148 35 148 5 Top ihe s HDTV 720P 44 96 45 59 94 60 148 35 148 5 Side by side Full HDTV 720P Top and Bottom Secondary HDTV 10801
23. g Enter key enter EDID D L menu 2 Select Start button by pressing Enter key HDMI1 HDMI2 HDMI3 are writing and display OK or NG For HDMI EDID DVI D to HDMI or HDMI to HDMI 4 1 4 EDID DATA HDMI 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F foxoo oo FF FF FF FF FF FF 00 1 fe x04 01 03 80 ao 5a 78 OA EE 91 A3 54 4C 90 26 joxo2 OF 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 ox03 01 01 01 01 Of Of 02 3A 80 18 71 38 2D 40 58 2C Ds 48 00 40 4 63 00 oie 66 24 50 mo st oo ie oo pos 40 70 36 00 40 84 63 00 00 16 09 m 00 FO 00 3a x06 3E 1E 53 10 oo oa 20 20 20 20 2 22 x07 A 6 IE Bepus wlm ejw o sw w w s w o e o Te Ox04 2D 40 58 2C 45 oo 40 84 63 00 00 1E O1 1D 80 18 Ox05 71 1C 16 20 58 2C 25 oo 40 84 63 oo oo 9E 01 1D ox06 00 72 51 DO 1E 20 6E 28 55 00 40 84 63 oo OO tE ox07j 00 00 00 00 00 00 oo oo oo oo oo oo oo oo oo 2 Detail EDID Options are below HDMI1 HDMI3 n the data of EDID bellows may be different by S W or Input mode a Product ID MODEL NAME HEX EDID Table DDC Function HD FHD Model 0001 01 00 Analog Digital b Serial No Controlled on producti
24. i amp 1080p Comp1 Caution xb 00 06 Change input source to RGB 1024 768 When still image is displayed for a period of 20 minutes or ad 00 10 Adjust 1920 1080 SCART RGB longer Especially where W B scale is strong Digital pattern ad 00 90 End adj 13ch and or Cross hatch pattern O9ch there can some aS age ONG Biac Sieueralee 3 2 MAC address DIL Cl key D L Widevine key D L ESN key D L HDCP key DIL 3 Automatic Adjustment C ring tr Foe 232C Port PC RS 232C Port onnect ig gt RS ort RS Or 3 1 ADC Adjustment Communication Prot connection 3 1 1 Overview ADC adjustment is needed to find the optimum black level and gain in Analog to Digital device and to compensate RGB deviation RS 232C Port 3 1 2 Equipment amp Condition 1 USB to RS 232C Jig Com 1 2 3 4 and 115200 Baudrate 2 MSPG 925 Series Pattern Generator MSPG 925FA Mode check Online Only pattern 65 Check the test process DETECT MAC CI Widevine Resolution 480i Comp1 ESN HDCP DTCP 1080P Comp1 Play START 1920 1080P SCART RGB Result Ready Test OK or NG Pattern Horizontal 100 Color Bar Pattern Printer Out MAC Address Label Pattern level 0 7 0 1 Vp p Image E ES Copyright 2013 LG Electronics Inc All rights reserved 13 LGE Internal Use Only Only for training and service purposes 3 3 LAN Inspection 3 3 1 Equipment amp Condition Each other con
25. ically then select OK key O K 3 Don t wear a 3D Glasses check the picture like below LGE Internal Use Only 4 6 Wi Fi Test Step 1 Turn on TV Step 2 Select Network Connection option in Network Menu Step 3 Select Start Connection button in Network Connection letwork Connection Start Connection Step 4 If the system finds any AP like blow PIC it is working well WE Wireless IPTIME hmhm oh MZ Wireless iptime BP Par WEP Wireless 2SIL WE Wireless uLGE s cuo na 4 7 LNB voltage and 22KHz tone check only for DVB S S2 model Test method 1 Set TV in Adj mode using POWER ON 2 Connect cable between satellite ANT and test JIG 3 Press Yellow key ETC SWAP in Adj Remote control to make LNB on 4 Check LED light ON at 18 V menu 5 Check LED light ON at 22 KHz tone menu 6 Press Blue key ETC PIP INPUT in Adjustment Remote control to make LNB off 7 Check LED light OFF at 18 V menu 8 Check LED light OFF at 22 KHz tone menu Test result 1 After press LNB On key 18 V LED and 22 KHz tone LED should be ON 2 After press LNB OFF key 18 V LED and 22 KHz tone LED should be OFF Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 20 4 8 Inspection of light scattering Test Method Power Only Power Only Key Light Scattering 1 Pu
26. ice purposes EIDDOODOENOENEEIE rr fa 10 sr os 13 os x4 os vz x2 2o 2 E so oe co se or so o eror ro es fee ras sc zo co se ox vz os o4 or a Lo es 05 os or o o es 6s Fa as 00 40 s 20 ec ze ss oo oo oo vo o oo LGE Internal Use Only HDMI 3 C S E8 CO EDID Block 0 Bytes 0 127 OOH 7FH reTs s e s 4 s s 7 5 Ta Foo oo rr re er re vr rr vo 1e eo or EJEIEICIEIEJETESERE SEE oop ee rao oz os ae Ft 20 zz 15 or 20 ros os ss or se os sr v rao o 10 oo ee sc 2o co se or oz os os rao os 1o 18 10 oe 1 16 10 25 to es os vs co o 1e zt ss p e zc 4s vo 4o s es reo for 15 so ws rr 16 16 ss ac 25 o eo oo se or o oo 72 st vo 1e 20 se 25 ss Fo ss oo oo x ao vo oo oo vo oo oo oo oo 4 2 White Balance Adjustment 4 2 1 Overview W B adj Objective amp How it works 1 Objective To reduce each Panel s W B deviation 2 How it works When R G B gain in the OSD is at 192 it means the panel is at its Full Dynamic Range In order to prevent saturation of Full Dynamic range and data one of R G B is fixed at 192 and the other two is lowered to find the desired value 3 Adjustment condition normal temperature 1 Surrounding Temperature 25 C x 5 C 2 Warm up time About 5 Min 3 Surrounding Humidity 20 96 80 96 4 Before White balance adjustment Ke
27. ld 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 10 mm away from PCB Keep wires away from high voltage or high temperature parts Before returning the receiver to the customer always perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the measured resistance should be between 1 MO and 5 2 MO When the e
28. lete adj CASE Medium Warm W B Adj must begin as start command wb 00 00 and First adjust the coordinate far away from the target finish as end command wb 00 ff and Adj offset if need value x y 1 X y gt target 2 Manual adjustment method LA965x i Decrease the R G 1 Set TV in Adj mode using POWER ON 2 X y lt target 2 Zero Calibrate the probe of Color Analyzer then place it i First decrease the B gain on the center of LCD module within 10 cm of the ii Decrease the one of the others surface 3 x gt target y lt target 3 Press ADJ key EZ adjust using adj R C 9 White i First decrease B so make y a little more than the target Balance then press the cursor to the right key When ii Adjust x value by decreasing the R right key is pressed 216 Gray internal pattern will be 4 x lt target y gt target displayed i First decrease B so make x a little more than the target 4 Adjust Cool modes ii Adjust y value by decreasing the G a Fix the one of R G B gain to 192 default data and decrease the others If G gain is adjusted over 172 Adjustment condition and cautionary items and R and B gain less than 192 Adjust is O K 1 Lighting condition in surrounding area b If G gain is less than 172 Increase G gain by up to Surrounding lighting should be lower 10 lux Try to 172 and then increase R gain and G gain same isolate adj area into dark surrounding amount of increasing G gain 2
29. nd of each of three leads remain ing 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 pos sible 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 Copyright 2013
30. nection to LAN Port of IP Hub and Jig IP 192 168 123 254 3 3 2 LAN inspection solution LAN Port connection with PCB Network setting at MENU Mode of TV Setting automatic IP Setting state confirmation f automatic setting is finished you confirm IP and MAC Address PCBA JIG Ready setting automatic IP 3 3 3 WIDEVINE key Inspection Confirm key input data at the IN START MENU Mode IN START 3 3 4 DTCP Inspection Confirm Key input at the IN START MENU Mode Below DTCP check on IN START MENU is enabled only for Models which DTCP key tool option is ON Only EU suffix models DTCP key option is on ex ATLAT90V ZA KEUYLJG INSTART Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 14 3 4 LAN PORT INSPECTION PING TEST Connect SET LAN port PC LAN Port SET PC 3 4 1 Equipment setting 1 Play the LAN Port Test PROGRAM 2 Input IP set up for an inspection to Test Program IP Number 12 12 2 2 3 4 2 LAN PORT inspection PING TEST 1 Play the LAN Port Test Program 2 Connect each other LAN Port Jack 3 Play Test F9 button and confirm OK Message 4 Remove LAN cable Ping Test LGE Internal Use Only 3 5 Model name amp Serial number Download 3 5 1 Model name amp Serial number D L Press Power on key of service remote control Baud rate 1152
31. ommercially available discharg ing wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 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 expo sure 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 sol der 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 elec trically 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 mate rial to the chassis or circuit assembly into which the device will be installed CAUTION Be sure no power is applied to the chassis or cir cuit and observe all other safety precautions 8 Minimize bodily motions wh
32. on 10 8 5 Vrms Auto Volume Off max Output Audio EQ Off Speaker 8 O Clear Voice Off Measurement condition 1 RF input Mono 1 KHz sine wave signal 100 Modulation 2 CVBS Component 1 KHz sine wave signal 0 5 Vrms 3 RGB PC 1 KHz sine wave signal 0 7 Vrms LGE Internal Use Only 6 USB S W Download Service only 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick f your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High USB data is automatically detecting Download Version High amp Power only mode Set is automatically Download 3 Show the message Copying files from memory a TV Software Upgrade Expert Copy the file from the Memory Do not remove the USB from the port Do not unplug 4 Updating is starting E TV Software Upgrade E TV Software Upgrade UPGRADING COMPLETED ET 33 AEAEE EEA EE ea Do not unplug The TV will restart automatically in Iseconds 5 Updating Completed The TV will restart automatically 6 If your TV is turned on check your updated version and Tool option explain the Tool option next stage If downloading version is more high than your TV have TV can lost all channel data In this case you have to channel recover if all channel data is cleared you didn t have a DTV ATV test on production line After downloading have to adjust Tool Option ag
33. on line Month Year Controlled on production line ex Monthly 01 01 Year 2013 17 Model Name Hex LGTV Cf TV set s model name in EDID data is below MODEL NAME LG TV 00 MODEL NAME HEX 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 LG TV Checksum LG TV Changeable by total EDID data EM EN NN HDMI soko 42 check sum Hex 23 HDMI1 Block 1 13 HDMI2 Vendor Specific HDMI INPUT MODEL NAME HEX HDMM 78030C001000801E HDMI2 78030C002000801E 1 EDID HDMI 1 C S E8 81 EDID Block 0 Bytes 0 127 DOH 7FH jolt 2 ENES osse or or oro e co es oo 00 8 4 5 6 7j 8 9 A B C D EJF s s s 7 s s 5 1e 5 6 rr fae 10 sr os 1s os x4 os 02 x2 2o 2 2 so o co ss ar so vo sr or zoos oc ee sc 0 co se or sa os on or ae sr ro as 10 es os os or oz 3 roo o es 6s ra 7r sc se 2o se 2c 25 oo 40 1 00 72 51 po e zo se 26 ss re 00 o0 vo oo co vo co co oo 00 00 4E 84 63 00 00 40 84 00 00 EO 4 HDMI 2 C S E8 DO zl L 0 Bytes Pt ooH 7FH Es ss st oo 18 30 20 00 00 FD 00 3A 20 20 20 00 00 00 FC 20 20 20 20 20 ot E8 EDID Block 1 Bytes 128 255 80H FFH alo 3 he or EJ Du E EJ or or Copyright 2013 LG Electronics Inc All rights reserved 16 Only for training and serv
34. op After final inspection press IN STOP key of the Adjustment remote control and check that the unit goes to Stand by mode 4 13 Tool Option selection Method Press ADJ key on the Adj R C then select Tool option Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes 21 4 14 GND and Internal Pressure check 4 14 1 Method 1 GND amp Internal Pressure auto check preparation Check that Power cord is fully inserted to the SET If loose re insert 2 Perform GND amp Internal Pressure auto check Unit fully inserted Power cord Antenna cable and A V arrive to the auto check process Connect D terminal to AV JACK TESTER Auto CONTROLLER GWS103 4 ON Perform GND TEST If NG Buzzer will sound to inform the operator If OK changeover to I P check automatically Remove CORD A V form AV JACK BOX Perform P test If NG Buzzer will sound to inform the operator If OK Good lamp will lit up and the stopper will allow the pallet to move on to next process 4 14 2 Checkpoint TEST voltage GND 1 5 KV min at 100 mA SIGNAL 3 KV min at 100 mA TEST time 1 second TEST POINT GND TEST POWER CORD GND amp SIGNAL CABLE METAL GND Internal Pressure TEST POWER CORD GND amp LIVE amp NEUTRAL LEAKAGE CURRENT At 0 5 mArms 5 Audio Audio practical 90 10 0 12 0 w Measurement condition max Output L R Distorti
35. sh Power only key 2 Push HDMI hot key 3 Inspect whether light scattering is occurred in internal black pattern or not 4 Push Power only key 4 9 Option selection per country 4 9 1 Overview Option selection is only done for models in Non EU 4 9 2 Method 1 Press ADJ key on the Adjustment Remote Control then select Country Group Meun 2 Depending on destination select Country Group Code 04 or Country Group EU then on the lower Country option select US CA MX Selection is done using or gt lt key 4 10 MHL Test 1 Turn on TV 2 Select HDMI4 mode using input Menu 3 Set MHL Zig M1S0D3617 using MHL input output and power cord 4 Connect HDMI cable between MHL Zig and HDMI4 port 5 Check LED light of Zig and Module of Set Result If the LED light is green and the Module shows normal stream OK Else NG LGE Internal Use Only 4 11 HDMI ARC Function Inspection 1 Test equipment Optic Receiver Speaker MSHG 600 SW 1220 1 HDMI Cable for 1 4 version 2 Test method 1 Insert the HDMI Cable to the HDMI ARC port from the master equipment HDMI1 2 Check the sound from the TV Set 3 Check the Sound from the Speaker or using AV amp Optic TEST program It s connected to MSHG 600 Flow Line mie Remark Inspect in Power Only Mode and check SW version in a master equipment Cell Line 4 12 Ship out mode check In st
36. t foil and hold it there only until the solder flows onto and around both the compo nent 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 cir cuit 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 e
37. tive 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 con nected 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 5 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 LED TV used LD34N 1 Performance LGE TV test method followed chassis 2 Demanded other specification Safety CE IEC specification EMC CE IEC 2 Requirement for Test Wireless Wireless HD Specification Option Each part is tested as below without special appointment 1 Temperature 25 C 5 C 77 F 9 F CST 40 C 5 C 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage AC 100 240 V
38. xposed 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 2013 LG Electronics Inc All rights reserved Only for training and service purposes rer 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 To Instrument s CONDUIT etc exposed METALLIC PARTS 1 5 Kohm 10W When 25A is impressed between Earth and 2nd Ground for 1 second Resistance must be less than 0 1 O Base on Adjustment standard LGE Internal Use Only SERVICING PRECAUTIONS CAUTION Before servicing receivers cov
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