COLOR TV SERVICE MANUAL
Contents
1. LGE Internal Use Only 12 EEPROM OPTION TABLE lt Table 1 gt PAL MODEL SOUTH EAST lt Table 2 gt PAL MODEL MIDDLE EAST You can find the EEPROM Option Data if entering the IN START key of the adjustable remote control and then pressing the MENU key OPTION 1 CPT DESCRIPTION Slim Ultra 1 Normal Flat REMARK XD MENU With 0 Without OPTION 1 CPT DESCRIPTION Slim Ultra 0 Normal Flat REMARK TURBO SND With 0 Without XD MENU With 0 Without V CURVE Volume Curve high 0 Volume Curve low TURBO SND With 0 Without V MUTE WithVideo Mute 0 Without V CURVE Volume Curve high 0 Volume Curve low SND MUTE OPTION 2 DVD WithSound Mute no signal 0 Without no signal DESCRIPTION With DVD input 0 Without REMARK V MUTE With Video Mute 0 Without SND MUTE With Sound Mute no signal 0 Without no signal Teletext With 0 Without EYE With 0 Without GAME With Game Module 0 Without X WAVE With Blue Back 0 Without X WAVE SCART OPTION 2 DVD With 0 Without DESCRIPTION With DVD input 0 Without REMARK COLOR T Color 10 STEP 0 EYE With 0 Without Degausss With 0 Without GAME With Game Module 0 Without HOTEL With 0 Without X WAVE With Blue Back 0 Without X WAVE2. 200Pr OPTION 3 NTSC 200 Program 0 100 Program DESCRIPTION With NTSC system 0 Without REMARK COLOR T Color 10 STEP 0 Degausss With 0 Without HOTEL With 0 Without DUAL SV With DUAL SAVING 0 Without PIP SYNC KILL 1 no signal 0 SYNC KILL 0 no signal SND1 EL 75KHZ mono filter 0 SOKHZ mono filter 200Pr OPTION 3 NTSC 200 Program 0 100 Program DESCRIPTION With NTSC system 0 Without REMARK SND1 FL2 200KHZ mono filter 0 100KHZ mono filter DUAL SV With DUAL SAVING 0 Without SND2 FL1 WithA2STEREO direction 0 Without PIPI SYNC KILL 1 no signal 0 SYNC KILL 0 no signal SND2FL2 WithNICAM direction 0 Without SND1 FL1 75KHZ mono filter 0 50KHZ mono filter HIDEV OPTION 4 OSD LANG With 0 Without DESCRIPTION INDONE IND ENG REMARK INDONESIA SND1 FL2 200KHZ mono filter 0 100KHZ mono filter SND2FL1 WithA2STEREO direction 0 Without SND2 FL2 WithNICAM direction 0 Without THAI THA ENG THAILAND VIETNA VIE ENG VIETNAM MULTI ENG IND THA VIE AUS ENG SND MODE MONO 1 AV STEREO 2 RF STEREO HIDEV OPTION 4 OSD LANG With 0 Without DESCRIPTION 0 ENG ENG REMARK 1 ARAB ENG FRE ARAB URUD 2 FARSI ENG FARSI AV NO AV
3. 6700VS0002F LGIT 3 0 0 05V 70dBu TAEW G002D PAL 6700PF0006B SANYO 2 3 0 05V 65dBu 115 B A86EL PAL 6870NB0026A LGIT 2 15 0 05V 65dBu TAEA JOO1F HITACHI 6700MF0014A LGIT 2 3 0 05V 65dBu TAEW G013D PAL 6700MF0014B LGIT 2 15 0 05V 65dBu TAEW G017D SECAM CIS 6700MF0018B LGIT 2 4 0 05V 65dBu TAEA G001D PAL 6700MF0018A LGIT 2 5 0 05V 65dBu TAEA G011D SECAM CIS Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes 4 Screen Voltage Adjustment 4 1 Adjustment Using Factory Remote Control 1 Input in the 75Q cable LG standard signal Digital Pattern 480NC 2 Press the ADJ key of factory remote control once to make the TV set display horizontal line 3 Turn the screen volume on the FBT clockwise until the horizontal line is visible and turn it counterclockwise until horizontal line faintly visible Exit screen voltage adjustment by press Enter key of factory remote control 5 Purity and Convergence Adjustment 5 1 Purity adjustment 1 Adjustment Preparation 1 Receive Red Raster Pattern for purity adjustment 51CH 2 Demagnetize the CPT and Cabinet with a degaussing coil 2 Adjustment 1 Pre adjust the static convergence STC with the 4 and 6pole magnet 2 If the horizontal Line is inline with CPT Mark 2 Pole magnet should direct 3 9 o clock direction 3 If not direct 2 pole magnet handle toward 6 1
4. All right reserved 16 LGE Internal Use Only Only for training and service purposes BLOCK DIAGRAM LS LNO 114W 92E6ALS dv 1V91143A CD ASLL OLL g AG OL woJ4 IfvOs8N eosol 70801 wo1 Wo wo14 WO1 4 AB 16 JL AG A6 LS LNO A JOU NVL SdINS ALLAZL 4 olanv AA Op 90SN ol apiy HANNL gues awed WINY LO TOS vas ALNG eur sng Oll CH rd vondo E LGE Internal Use Only 17 Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes PRINTED CIRCUIT BOARD MAIN P80B PBOIA R807 KL Bi S XxX R543 g 4a d zE Fay EE 3 gy Bi N 55 Ig is c53 e ale 3 a YE sa hh d SS op ES CI ax Ces i 3 g 28 o g 8 S Ap pa 3 3558 z PRE L90 Ring or P Si e ag Ts E oni f A 3 p ech 5 EL J ie E TEE o 7 Te E j 3 0692 w 1 H Z d E f 2 g 7 d 1a sh sa Se mg Heb iR O xl 1 www z ale Bi LS s ke t Le Te
5. General specification No Item Specification Remark 1 Receiving System PAL BG DK I NTSC M AV 3 58 4 43 China Indonesia Thai Vietnam PAL BG DK NTSC M AV 3 58 4 43 CIS SECAM DK PAL NM NTSC M AV 3 58 L America Philippines Taiwan PAL BG DK I NTSC M AV 3 58 4 43 Asia Middle Cast Africa SECAM BG DK L 2 Available Channel VHF E2 E12 UHF E21 E69 PAL Model CATV S1 S20 HYPER S21 S41 3 Input Voltage AC220V 50 60Hz East Asia AC100 240V 50 60Hz Others 4 Market Korea Latin America China Indonesia Philipines Taiwan Thai Vietnam Asia Africa 5 Screen Size 14 21 inch FLAT Conventional 21 Superslim Ultraslim 6 Aspect Ratio 4 3 7 Display Method CRT 8 Tuning System FVS PAL Model 9 Operating Environment 1 Temp 0 40 deg 2 Humidity 85 10 Storage Environment 1 Temp 20 60 deg 2 Humidity 90 Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Features and Function For China Indonesia Vietnam Thai CIS Middle East Asia Africa No Item Specification Remark 1 Feature AV Input 2 AV1 2 Rear1 Front1 CVBS L R Tool Option For China Vietnam Thai CIS AV Output 1 Monitor out Rear Component 1 Input For component Rear Y Pb Pr DVD L R 2 Key Local Key Power Vol lt g
6. 1 AV1 2 AVI 2 Local KEY 4 KEY 1 6 KEY 2 8 KEY lt Table 1 gt Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes TXT LANG OPTION 5 Snd Mode 0 1 2 3 0 EU WEST 1 EU EAST 2 ARABIC 3 FARSI DESCRIPTION 0 MONO 1 AV STEREO 2 RF STEREO REMARK AV 0 NO AV 1 AV1 2 AV12 Local Key 0 4 KEY 1 6 KEY 2 8 KEY lt Table 2 gt LGE Internal Use Only lt TABLE 3 gt svc Register Range Initial PAL Initial SECAM Remark RF AGC 0 63 32 32 Necessary R BIAS 0 255 90 90 Necessary G BIAS 0 255 90 90 Unnecessary B BIAS 0 255 90 90 Necessary R DRIVE 0 127 85 85 Necessary SVC 01 G DRIVE Da 127 95 95 Unnecessary B DRIVE 0 127 85 85 Necessary Y DELAY 0 15 4 4 Unnecessary OSD CONT 0 7 5 5 Unnecessary OSD POS 0 60 42 42 Unnecessary V POS 0 15 9 9 Necessary V LIN 0 31 22 22 Unnecessary VA 0 127 92 92 Necessary H POS 0 31 4 4 Necessary EW WIDTH 0 127 74 74 Necessary EW PARAB 0 127 44 44 Necessary EW TRAPE 0 127 39 39 Necessary EW UPCOR 0 31 21 21 Necessary svc 02 EWLOCOR 0 31 8 8 Necessary HP BOW 0 31 16 16 Necessary HP ANGLE 0 31 16 16 Necessary VSC 0 7 18 18 Unnecessary V COMP 07 7 7 Unnecess
7. Only for training and service purposes Before returning the receiver to the customer always perform an AC leakage current check on the exposed metallic paris 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 1M9 and 5 2MQ When the exposed metal has no return path to the chassis the reading must be infinite An other abnormality exists that must be corrected before the receiver is returned to the customer Leakage Current Hot Check See below Figure Plug the AC cord directly into the AC outlet Do not use a line Isolation Transformer during this check Connect 1 5K 10watt resistor in parallel with a 0 15uF capacitor between a known good earth ground Water Pipe Conduit etc and the exposed metallic parts Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms volt or more sensitivity Reverse plug the AC cord into the AC outlet and repeat AC voltage measu
8. VETICAL REFERECE SECTION AHH xo 7m lt GAIN C313 C322 lt q VERT SIZE PROBLEM VERT LINEARITY PROBLEM POWER OFF PROTECTION ENABLED 15303 15308 VCC SECTION 24V OUTPUT STAGE VCC SECTIO FR301 D301 C303 C309 C306 PUMP UP VCC Ers FBT SEC O P VCC C307 D302 FULL RASTER VCT VERT PROTECTION VERT PROTECTION ENABLE GE ENABLE CAUSES NO POWER POWER OFF 7 HORIZONTAL SECTION 14402 H OUT HORZ O P SECTIO HORZ DRIVE SECTION R403 R401 Q402 C414 47V VCC Q401 7403 c404 IF gt DEFLECTION PROB POWER OFF DEFLECTION PROB POWER OFF STRANGE NOISE MAIN VCC 110V Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes C412 L401 L402 HORZ SIZE PROBLEM STRANGE NOISE INEARITY ADJ NOT WORK lt o NTOT COLLECTOR HEATER VOLTAGE FR401 X RAY WORKING SAFETY PROB ROLLING PICT 180V VOLTAGE FR501 D505 C540 gt HORZ LINE NO RETRAC 26V VOL FR301 D301 ANODE FOCUS SCREEN gt FBT T402 LGE Internal Use Only 8 SOUND PROCESSING SECTION Speaker ANT 13602 Sound Amp E1100 k 1 CHIP IC NICAM IC TUNER gt LV762XX LC75024E LA42102L 10W 2 cb 13603 E TUNER RF signal is feed to TUNER through Antenna IF output from Tuner is then gi
9. 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 LGE Internal Use Only P NO 3854VA0196E 08 05 21 Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only SVC SHEET 3854VA019
10. remote control continuously to enter to Deflection Adjustment mode 3 Press the CHA V key to select adjustment item 4 Press the VOL gt key to change the data 9 2 Adjustment 1 Horizontal Position Adjustment Select SVC02 H POS and adjust so that the left and right vertical line are symmetrical as possible 2 Vertical Position Adjustment Select SVC02 V POS and adjust so that the horizontal center line coincide with geometric horizontal center of the CPT 3 Vertical Size Adjustment Select SVC02 VA and adjust so that the middle circle of the Digital Pattern 480NC 13CH coincide with the effective screen of CPT 9 3 Adjustment 21 Superslim Ultra S S Model 1 Vertical Position Adjustment Select SVC02 V POS and adjust so that the horizontal center line coincide with geometric horizontal center of the CPT 2 Vertical linearity Adjustment Select SVC02 V LIN and adjust so that the size of the upper circle is alike with the one of the lower circle at LG standard pattern PAL EU05CH NTSC 13CH 3 Vertical Size Adjustment Select SVC02 VA and adjust so that the middle circle of the Digital Pattern PAL B G 5CH has 6 7mm gaps from the effective screen of CPT 4 Horizontal Position Adjustment Select SVC02 H POS and adjust so that the left and right vertival line are symmetrical as possible 5 Horizontal Size Adjustment Select SVC02 EW WIDTH and adjust so that the outer line of the left and right and the remotest g
11. 2 o clock direction and adjust the Horizontal Line to fall onto the mark opening the magnet at an angle 4 Push the DY deflection yoke all the way to the CPT funnel 5 Turn the purity magnet 2 pole magnet so that the green color portion of left side and the blue color portion on the right side have equal amount of color G R B G R B 6 Pull the DY slowly backward and fix it when the whole screen becomes red The specified torque for fixing DY screw should be 10Kg cm G n B R 5 2 Convergency Adjustment 1 Necessary Instrument 1 Degaussing Coil 2 Convergency fixing instrument Speical tools 2 Adjustment Preparation 1 Operate the unit at least 15 minutes before adjustment 2 Using degaussing coil remove the stains on CPT amp Cabinet 3 Received the Cross Hatch Pattern of Convergence 09ch 4 Let the Contrast in normal luminance level 3 Static Convergence STC Adjustment 1 Receive the Cross Hatch Pattern Convergence 09ch LGE Internal Use Only 2 Before adjusting Static Convergence STC adjust the focus first seeing to it that the WHITE color picture quality is sharp enough 3 Converge the RED vertical and BLUE vertical line in unity same line by changing the angle between the 2 tabs of 4 pole magnet 4 Converge the RED horizontal and BLUE horizontal line in unity same line by turning the 2 tabs of the 4 po
12. 6E S
13. 8105 16403 18102 FILTER SECTION FUSE amp VARISTOR BS SMPS TRANS BRIDGE RECTIFIER VD801 TVR621D AC INPUT lt T802 150 FO6T La Fao1TaaL250v lt DB801 TS4B05G NO POWER __ P801A B SW801 POWER RADIATION NO POWER SAFETY PROBLEM SS NO BOWER FUSE OPEN FUSE OPEN f KORENE NO RECTIFIER 18104 ROUE se BERIE RELAY DEGAUSS 18106 FUSE OPEN amp STR b d DAMAGED DUE TO CHANGE RL801 Q845 D847 START RESISTOR IN PRIMARY INDUCTANCE S d OF SMPS NO MICOM CONTROL R804 R805 TO 1 NO DEGAUSS H DEGAUSS PURITY PROBLEM STR SWITCH ON PROB COIL COPIE NO POWER 18108 18108 STR VCC POWER SECTION IC801 STR W6754 SECONDARY LOAD REGULATION POOR D815 R804 R805 R810 R839 OVER VOLTAGE PROT NOT OPR STR NO OPR NO POWER NO POWER INTERMITANT NO POWER 6 EXCESSIVE UP VOLTAGE CAUSES SWITCHING NOISE NO POWER NO OSCILLATIONS ft 18111 STR FEED BACK SECTION 18205 LOAD REG FB SECTION gt D645 R510 C840 IC802 2840 R808 R853 C852 STR NO OPR NO POWER INTERMITENT NO POWER SMPS SEC LOAD REG POOR SECONDARY O P VOLTAGE POOR INTERMITANT NO POWER INTERMITANT ST BY MODE 5 SMPS SECONDARY SECTION bss S Vcc 9V RS 68 TUNER Vcc 17V C LA42101 7 Vcc IC 601 SOUND amp 5W MONO 20V 10W D tt egw IC 601 SOUND 5W 5 W ST SFAF504G 330u 25V LA42102 7 Vcc amp Lan LA42102N 7 Vcc IC 601 SOUND amp 10W 10W ST ST 5 KIA78L05BP D Coil Relay Paka IC04 T X Pre Amp MAIN IC 24
14. North Latin America 7 http aic Igservice com Europe Africa http eic Igservice com Asia Oceania http biz Igservice com COLOR TV CHASSIS CW81A MODEL 21FB3AB LG Electronics Inc MODEL 21FB3AB T3 Z3 CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL Jul 2009 P NO MFL42451232 Printed in China CONTENTS CONTE AA AA AA 2 SAFETY PRECAUTIONS mupa aaa a anasanat 3 SPECIFICATIONS AA APA 4 ADJUSTMENT assassin 6 TROUBLE SHOOTING E 13 BLOCK DIAGRAM saka ren isn stats ne aies states 17 PRINTED CIRCUIT BOARD Kumakana gege 18 EXPLODED VIEW eege 20 Copyright 2009 LG Electronics Inc All right reserved 2 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 in the Schematic Diagram and Replacement Parts List It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer General Guidance An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line Use a transformer of adequate power rating as this protects the technician from accident
15. Vcc 1000u 16V ma ahay EEPROM 8 Vcc D806 2777 R620 TVR06J IC804 Rea IC8035V 1 C838 KIA78R09API KIA7805API LV76213 62 4 Vcc IC 501 Main IC E eoma LA72730 8 Vcc IC 751 SWIC sama LA72702N 19 Vcc IC 661 RF STEREO NT ERT Tl Ce LA42102 5 St by IC 601 SOUND amp dapa i 33V LC75024E 3 3V Vcc 8 i 33VReg IC 807 NICAM Gap mat 18v Tz i 1 5V Reg frs d d LC75024E 1 5V Vcc D505 C540 1 60mA 4 7u 250V l R520 FM TX Game USB OPT i Tl ov RS 620 3 3V 10mA 1 R513 LV76213 9 Vcc IC 501 Main IC 3 3V Vcc f LA78040N j DV RS 300 2 Vee R529 LV76213 20 Vcc IC 501 Main IC Hor Vcc i i Lov RS 68 d H See LV76213 49 Vcc IC 501 Main IC RGB Vcc l i 1 470u 35V SES er 000 x FBT B LL R833 L802 FR403 fears rie RS 0 47 2W 82uH RF 1 2 2W 28V 32V C831 R107 220u 160V RS 12K 2W Copyright 2009 LG Electronics Inc All right reserved 2444 LGE Internal Use Only Only for training and service purposes 6 VERTICAL SECTION 15300 VERTICAL IC IC301 PUMP v VIN VCC up GND oun 15301 5301 VERTICAL Up R305 R309 R311 C322 VCT VERTICAL O P RETRACE KINE VERT SIZE PROBLEM VERT IC O P CAN DECIDE LA78141 o a gt gl m 15305 VERTICAL O P DAMPING amp FILTER R310 R315 C314 C305 C310 y VERTICAL FOLDING VERTICAL ROLLING NOISE HORZ LINE MOVING UP DOWN lt
16. adjustment 8 1 Adjustment Preparation 1 Receive PAL B G 5CH pattern 2 Set the picture condition on PSM ON DYNAMIC mode 8 2 Adjustment 1 Press the ADJ key of the factory remote control twice to enter to SUB BRIGHTNESS adjustment mode 2 Change the Sub Brightness data by pressing the VOL VOL key so that the 1th 2th black level in gray scale of PAL B G 05CH pattern have a little bit of difference See Fig 2 ga 1th VS 2th BLACK LEVEL have a bit of difference In case of Vietnam Model 2th VS 3th BAES AER Fig oe PACS mm l m lt Fig 2 gt PAL B G 05CH Signal LGE Internal Use Only 8 3 Sub Tint adjustment This adjustment has to be done only if the picture has bad tint otherwise it can be omitted if the picture has good tint 1 Receive LG standard pattern signal SMPTE 2CH 2 Set the picture condition on APC ON CLEAR mode 3 Press the ADJ key of the factory remote control three times to enter to SUB TINT adjustment mode 4 Change the Sub Tint data by pressing the VOL lt VOLP key until the upper and lower CYAN color becomes same color 9 Deflection setting data adjustment These adjustment will be done by automatic adjustment Equipment For manual adjustment it is also possible by the following procedure 9 1 Adjustment Preparation 1 Deflection setting data adjustment can be done only with remote control 2 Press IN START key on factory
17. ary HS COMP 0 7 7 7 Unnecessary VDC 0 63 28 28 Unnecessary VBLK SW 0 normal mode 1 wide mode 3 3 Unnecessary H BLK L 0 7 4 4 Unnecessary HBLKR 0 7 4 4 Unnecessary EW Cor 0 Normal mode 1 Corner pin gain up mode 0 0 Unnecessary DEEM TC 0 50us 1 75us 0 0 Unnecessary FM GAIN 0 500mVrms 50KHz deviation for PAL 0 0 Unnecessary A2 SW 0 Normal mode 1 5 74MHz mode need to set SIF system 1 0 0 Unnecessary SIF SYS 0 4 5MHz 1 5 5MHz 2 6 0MHz 3 6 5MHz 1 1 Unnecessary CH CONV 0 Normal BPF mode 1 CH converter measure mode at India 0 0 Unnecessary FM MUTE 0 Enable FM output 1 Disable FM output 0 0 Unnecessary VOL FIL 0 Filter OFF 1 TV operating mode 1 1 Unnecessary VOLUME L 0 127 50 50 Unnecessary AUDIO SW MONO Mode 0 0 Stereo EXT 1 Stereo INT 0 0 Unnecessary MONO Mode 1 0 MONO CH1 1 MONO CH2 0 MONO CH3 1 MONO CH4 SNG 03 SURR CNT 0 Surround OFF 1 MODE A 3dB 2 MODE B 0dB 3 MODE C 3dB 0 0 Unnecessary MONO 0 STEREO input mode 1 MODE input mode 0 0 Unnecessary VOLUMER 0 127 50 50 Unnecessary TONE ATT 0 OdB 1 6dB 0 0 Unnecessary T BOOST C 0 Cut 1 Boost 0 0 Unnecessary TREBLE 0 63 63 63 Unnecessary PSEUD ST 0 Pseudo Stereo OFF 1 Pseudo Stereo ON 0 0 Unnecessary BBOOST C 0 Cut 1 Boost 0 0 Unnecessary BASS GA 0 63 63 63 Unnecessary S TRAP 0 min 7 max 2 2 Unnecessary S TRAP SW 0 Sound trap OFF mode need external trap 1 Normal mode sound trap ON 1 1 Unn
18. cessary SNC 10 Ch1 Pre 0 49 29 29 Unnecessary FM 2 Pre 0 49 29 29 Unnecessary NICAM Pre 0 49 30 30 Unnecessary MONO Pre 0 49 10 10 Unnecessary CH1 MTH 0 143 48 48 Unnecessary CH1 LTH 0 255 0 0 Unnecessary CH2 MTH 0 143 47 47 Unnecessary CH2 L TH 0 255 0 0 Unnecessary BERL 0 255 64 64 Unnecessary BERH 0 255 128 128 Unnecessary Copyright 2009 LG Electronics Inc All right reserved 1 49 LGE Internal Use Only Only for training and service purposes 1 TV FUNCTIONAL TROUBLE SHOOTING 11100 TUNER IF gt 12500 VIDEO MICOM 14400 HORZ DEFL i 13100 SOUND 15300 VERT DEFL 18200 SMPS Secondary 16100 CPT i 18100 SMPS Primary 2 TU IF SECTION 11100 TUNER TUNER INPUT SECTION 5V ZD102 C108 C106 30V C103 C107 ZD103 R150 TUNER Not Working TU SEARCH Problem TUNING Problem SDA R514 SCL R516 CONTROL SECTION TUNER Not Working TU SEARCH Problem TU Weak Picture Signal 3 VIDEO PROCESSING 12500 VIDEO MICOM R154 C101 Z111 NO CH SEARCH NO PICTURE NO SOUND REAR AN DVD AUDIO VIDEO No UP O P Copyright 2009 LG Electronics Inc All right reserved AUDIO L R L IN L221 C215 R IN L222 C222 VIDEO IN L225 R226 DVD Y Pb Pr IN C210 C211 C212 DVD R IN L221 C215 DVD L IN L222 C222 12503 SET Maneuver defectivene
19. cessary SUB BIAS 0 127 20 20 Unnecessary V TRANS 0 Random transmission 1 Transmission between vertical retrace period 1 1 Unnecessary DIG OSD 0 Analogue OSD mode 1 Digital OSD mode 1 1 Unnecessary RGB CONT 0 15 5 5 Unnecessary RGB TEMP 0 1VBE 1 Flat 1 1 Unnecessary ACL DEF 0 ACL Defect OFF 1 ACL Defect ON 0 0 Unnecessary ACL SW 0 High sentivity 1 Low sentivity H 1 Unnecessary ABL DEF 0 ABL Defect OFF 1 ABL Defect ON 0 0 Unnecessary MID STP 0 Enable limit operating 1 Disable limit operating 1 1 Unnecessary ABL TH 0 7 4 4 Unnecessary VXO ADJ 5 5 Unnecessary CrCb IN 0 Video 1 CbCr 0 0 Unnecessary SVC 06 C EXT 0 Internal composite video signal 1 From pin 2 input 0 0 Unnecessary C BYPASS 0 Bypass OFF 1 Bypass ON used in Y C mode 0 0 Unnecessary C KION 0 Automatic mode TV in operation 1 Enforce killer ON when color control is min 0 0 Unnecessary C KI OFF 0 TV in operation 1 Test mode killer circuit is not in operation 0 0 Unnecessary C KI OPE 0 7 30dB 40dB 4 4 Unnecessary GRN ADJ 0 7 Auto green off level high 0 0 Unnecessary TINT TH 0 Normal mode 1 Tint control set center value cann t control tint 0 0 Unnecessary ID KILL 0 Easy to become NTSC 1 Easy to become PAL 7 7 Unnecessary CVCOADJ 0 7 4 4 Unnecessary VCO CNTR 0 Normal mode 1 VCO free run mode 2 2 Unnecessary FSC EHT 0 FSC OUT 1 EHT 1 1 Unnecessary C SYS 0 PAL NTSC 4 43 NTSC AUTO 1 PAL M PAL N NTSC AUTO 0 0 Unnece
20. ch ON Starting Point 601RE SVC 04 3 Black Stretch OFF BS GAIN 0 min 2 max 1 1 Unnecessary C TRAP 0 min 7 max 4 4 Unnecessary C BPF 0 min 3 max 0 0 Unnecessary GAMMA GA 0 min 3 max 0 0 Unnecessary GRAY MDE 0 White 70 1 Gray 15 0 0 Unnecessary YCMIX 0 YC_C 1 2 2V_DC 0 0 Unnecessary TXT CC 0 Output without LPF 1 Output by LPF 0 1 Unnecessary VIN XRGB 0 FBP EXT RGB IN 1 YC C DVD Y CR IN CB IN 1 0 Unnecessary T DISABLE 0 Test mode 1 TV operating normally 1 1 Unnecessary H FREQ 0 63 70 70 Unnecessary AFC G 0 Automatic mode 1 Enforce high gain mode 0 0 Unnecessary A MUTE 0 Audio Mute OFF 1 Audio Mute ON 0 0 Unnecessary V MUTE 0 Video Mute OFF 1 Video Mute ON 0 0 Unnecessary SYN KILL 0 1 0 0 Unnecessary V KILL 0 TV operating mode 1 Defeat the vetical output 0 0 Unnecessary VSEP 0 Normal mode 1 Sensitivity up mode 0 0 Unnecessary VREST 0 Normal mode 1 Sensitivity up mode 0 0 Unnecessary HLVDT 0 If H Lock is not defect stop vertical sync detection 0 0 Unnecessary SVC 05 1 V sync system always working V SYN 0 0 Unnecessary CD MODE 0 7 0 0 Unnecessary FBPBLK 0 1 1 1 Unnecessary AFC NST 0 Normal mode 1 Enforce low gain mode non standard 0 0 Unnecessary AFC2SW 0 About 4us 8us 1 about 8us 12us 0 0 Unnecessary CROSS BW 0 TV operating mode 1 Black pattern 2 White pattern 3 Crosshatch pattern 0 0 Unnecessary BLK DEF 0 Blanking ON normal mode 1 Blanking OFF 0 0 Unne
21. ecessary F DDS 0 Normal mode NTSC work PAL SECAM stop 0 0 Unnecessary 1 Forced DDS mode always work DELAY T Delay Test 0 0 Unnecessary Y FILTER 0 3 58MHz Trap 1 4 43MHz Trap 2 Wide mode 3 4 286MHz Trap 1 1 Unnecessary C FILTER 0 3 58MHz peaking 1 3 58MHz symmetrical 0 0 Unnecessary 2 4 43MHz peaking 3 4 43MHz symmetrical Y APF 0 Chroma trap ON composite video mode 0 0 Unnecessary SES 1 Chroma trap OFF YCbCr mode and YC mode COR GAIN 0 Coring OFF 1 Coring Gain 1 minimum 3 3 Unnecessary 2 Coring Gain 2 middle 3 Coring Gain 3 maximum P SHOOT 0 narrow 3 wide 0 0 Unnecessary O SHOOT 0 narrow 3 wide 0 0 Unnecessary WPL OPE 0 WPL OFF 1 High operating point 0 0 Unnecessary 2 Middle operating point 3 Low operating point Copyright 2009 LG Electronics Inc All right reserved 10 LGE Internal Use Only Only for training and service purposes svc Register Range Initial PAL Initial SECAM Remark GAMMA ST 0 Low operating point 1 Middle operating point 3 3 Unnecessary 2 High operating point 3 Defect DC REST 0 100 1 107 2 11396 3 129 1 1 Unnecessary BS START 0 Black Stretch ON Starting Point 401RE 0 0 Unnecessary 1 Black Stretch ON Starting Point 501RE 2 Black Stret
22. er white balance adjustment mode by pressing INSTART key of factory remote control 3 Use the CHA CHY Key to choose adjustment item 4 Use the VOL lt VOLP Key to change item data 5 Adjustment Procedure a Make the picture luminance 45Ft L by changing the CONTRAST and BRIGHTNESS b Adjust X data of High light with R DRIVE and Y data of high light with B DRIVE to have the color temperature as shown below c Make the picture luminance 4 5Ft L by changing the CONTRAST and BRIGHTNESS d Adjust X data of low light with R BIAS and Y data of low Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes 7s light with B BIAS to have the color temperature as shown below e Repeat steps a d until both low and high light have the same readings as shown below X AXIS 268 5 Y AXIS 273 5 Market Color Temperature ALL 13 000 7 Focus Voltage Adjustment This adjustment must be done after operating the TV set receiver sufficiently 7 1 Adjustment Preparation Receive the LG standard pattern PAL Digital pattern 480NC 13CH and set the picture condition on APC ON CLEAR mode 7 2 Adjustment Turn the focus volume on the FBT upper direction to have the best focus vertical line Fig 1 a and horizontal line Fig 1 b as shown below NT 8 SUB BRIGHTNESS Adjustment This adjustment must be done after White balance
23. ge 0 0 Unnecessary 2 100KHz 4 5 0 5v change 3 50KHz 4 5 0 5v change VCO ADJ 15 15 Unnecessary VIDEO SW 0 Internal 1 External 2 DVD Y 3 YC Y 1 1 Unnecessary SYNC SS 000 Low sync tip side 100 Middle normal 111 High pedestal side 1 1 Unnecessary DintLace 0 Normal mode 1 Deinterlace mode 0 0 Unnecessary OE TEST 0 0 Unnecessary Ext RB Ext R Bias setting 8 8 Unnecessary Ext GB Ext G Bias setting 8 8 Unnecessary Ext BB Ext B Bias setting 8 8 Unnecessary Ext RDr Ext R Drive setting 8 8 Unnecessary Ext GDr Ext G Drive setting 8 8 Unnecessary SVC 08 Ext BDr Ext B Drive setting 8 8 Unnecessary MONI C2 0 0 Unnecessary DDS BPF DDS Band Pass Filter 2 2 Unnecessary BELL ADJ Secam IC Only 0 1 Unnecessary BELL MONI Secam IC Only 0 0 Unnecessary S KIL OPE Secam IC Only 0 0 Unnecessary S KIL ON Secam IC Only 0 0 Unnecessary S KIL OFF Secam IC Only 0 0 Unnecessary BellBypas Secam IC Only 0 8 Unnecessary Text Hpos Text Only 0 0 Unnecessary Text VPos Text Only 0 0 Unnecessary SVC 09 DE EM SW 0 Cut off freq high 1 Cut off freq low 1 1 Unnecessary CIK STOP 0 Normal 1 IC Test Mode 0 0 Unnecessary TEST MODE 0 7 0 0 Unnecessary MONI cber 0 Normal 1 IC Test Mode 0 0 Unnecessary IF TEST 0 Normal 1 1C Test Mode 0 0 Unnecessary DVD VOL 0 100 0 0 Unnecessary MAX VOL 0 100 100 100 Unnecessary CLPDEL50 0 31 18 18 Unnecessary CLPDEL60 0 31 18 18 Unnecessary CLPLEN 158 3 3 Unnecessary CLMPID 143 3 3 Unnecessary PIP H 0 255 10 10 Unne
24. la MT Si En EIER CH 7e al Het a 18 m ji S C it Bs S xd EI LE LEE 1 o BS R873 Le P 3 3 D Tho Sie Le J823 S R 3 Momi O 1 7 48 So gt T a W gig el 2m Bee sS e Su a m L 1 a m Pye ig 5 UH 0824U U gl BT lg Lil 1 d NG HC E 3 gl AL NG 0845 tu 0806 Ki CG 2 8 K IW E z R60 2 D E LA 28 a ez ey S JE S 3 ge 9 15 ES g SG Zz Sr FI By mm S on SS S FBB amp 4 Ti TEME als 3 H z x o Te l g 4 op a Fi R858 SN HE at Gu EN 4 Wits ZE P801 pi EH Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 18 PIP option Q 3 nag k CC CP21 CP3T ar 1CP02 lt gt IPOT cpa mad Zuma CP29 D SIDE AV JAI201 L2 ng Sa 81925195 MCO59A CWBIB SIDE A V BINYM LOLOBO 0 G 706SA0L89 Copyright 2009 LG Electronics Inc All right reserved 19 LGE Internal Use Only Only for training and service purposes EXPLODED VIEW SI NI Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes sD IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED
25. le magnet At this time do not change the angle between the 2 tabs 5 Converge the R G B vertical line in unity same line by changing the angle between the 2 tabs of the 6 pole magnet 6 Converge the R G B horizontal line in unity same line by turning the 2 tabs of the 6 pole magnet At this time do not change the angle between the 2 tabs 4 Dynamic Convergence DYC Adjustment 1 Y axis Adjustment Adjust convergence of Y axis vertical by moving the deflection yoke DY left and right 2 X axis Adjustment Adjust convergence of X axis horizontal by moving the deflection yoke DY up and down 6 White Balance Adjustment 6 1 Necessary Instrument 1 Automatic White Balance Meter Low High light Pattern generator 2 CRTColor Analyzer CA 100 1 set 3 Factory Remote Control 6 2 Adjustment Preparation Prior to this adjustment the Screen Voltage adjustment should be finished 6 3 Automatic adjustment 1 Adjust using Auto White Balance Meter 2 Enter CPU OFF Mode by pressing IN START amp MUTE key of factor remote control in turn before adjustment Exit CPU OFF mode by press the MUTE key of factory remote control after adjustment finished In case there is excess RED color at screen voltage adjustment adjust it using volume 4 key of factory remote control until the RED color disappear 6 4 Manual adjustment 1 Adjust using white Balance meter and factory remote control 2 Ent
26. rements for each exposed metallic part Any voltage measured must not exceed 0 75 volt RMS which is corresponds to 0 5mA In case any measurement is out of the limits specified there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer Leakage Current Hot Check circuit AC Volt meter Good Earth Ground such as WATER PIPE To Instrument s CONDUIT etc 0 15uF exposed METALLIC PARTS a AW gt 1 5 Kohm 10W LGE Internal Use Only SPECIFICATIONS Note Specification and others are subject to change without notice for improvement Scope This specification is applied to all the television related to CW 81A Chassis Requirement for Test Each part is tested as below without special appointment 5 The receiver must be operated for about 20 minutes prior to the adjustment Test Method 1 Performance LGE TV test method followed 2 Demanded other specification Model Market Remark Appliance 1 Temperature 25 5 C 77 49F CST 4045 T3 Z3 Model PAL Model Safety CB Spec EN60065 2 Relative Humidity 65 10 EMC CE Spec EN55020 3 Power Voltage Standard input Voltage AC220V 50 60Hz Standard Voltage of each products is marked by models EN55013 4 Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM
27. rid will correspond to the effective boundary surface The remotest grid PAL within 0 25 NTSC within 2 5 3 0 column 6 Parabora Adjustment Select SVCO2 EW PARAB and adjust so that the vertical line of the remotest grid at the left or right side of the screen will Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes 8 be parallel to the vertical line of the center of screen or the remotest grid of CPT 7 Trapezoidal Adjustment Select SVC02 EW TRAPE and adjust so that the width of the upper part of screen is alike with the one of the lower part of the screen 8 EW UPCOR LOCOR Adjustment Select SVC02 EW C UPCOR EW LOCOR and adjust so that the vertical line in the four corners become straight line 9 BOW Adjustment Select SVC02 HP BOW and adjust so that the vertical line in the four corners become straight line 10 IIC BUS SUB Adjustment Data Table OSD Range PAL NTSC Secam SUB BRIGHTNESS 0 100 40 60 40 SUB TINT 20 R 20 G R5 G8 R5 11 Auto Adjustment Preparation Setting Table VIDEO IC EEPROM Speed Delay SLave ADD BA AO 1 5 VCD TV PC R DRIVE RBIAS B DRIVE BBIAS B AMP BCUT G AMP G CUT Sub Add D A F Cc Start Bit 6 7 6 7 Stop Bit 0 0 0 0 Masking 0 0 0 0 Direction 1 1 1 d EEPROM 8D 8A 8F 8C Sub Add SpeedPlus 3 3 3 3 Step Data
28. s resulting in personal injury from electrical shocks It will also protect the receiver and it s components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation If any fuse or Fusible Resistor in this TV receiver is blown replace it with the specified When replacing a high wattage resistor Oxide Metal Film Resistor over 1W keep the resistor 10mm away from PCB Keep wires away from high voltage or high temperature parts Due to high vacuum and large surface area of picture tube extreme care should be used in handling the Picture Tube Do not lift the Picture tube by it s Neck X RAY Radiation Warning The source of X RAY RADIATION in this TV receiver is the High Voltage Section and the Picture Tube For continued X RAY RADIATION protection the replacement tube must be the same type tube as specified in the Replacement Parts List To determine the presence of high voltage use an accurate high impedance HV meter Adjust brightness color contrast controls to minimum Measure the high voltage The meter reading should indicate 23 5 1 5KV 14 19 inch 26 1 5KV 19 21 inch 29 0 1 5KV 25 29 inch 30 0 1 5KV 32 inch If the meter indication is out of tolerance immediate service and correction is required to prevent the possibility of premature component failure Copyright 2009 LG Electronics Inc All right reserved s9
29. ss Clock Error OSD Not Working MENU Picture Error Only for training and service purposes OSC SECTION 4 43MHz X501 R537 11103 MOD CONTROL SECTION AGC C110 R151 J108 R109 R154 R108 TV system Detection Problem TV MODE Weak Picture Signal VIDEO SOUND BUFFER IF Z111 C101 R100 No Video Signal No Sound Signal Video S N Problem Sound S N Problem Video NoiseNo Sound Noise R C RECEIVER PA01 R82 C30 C28 In case of influx NOISE R C is not operate 12510 LED O P Section SOUND Section LD11 R58 R60 R72 Q10 R622 R621 R501 R504 C502 C506 C507 KEY I P Section RESET SECTION R22 C15 SET Maneuver defectiveness MENU Picture Error SET LATCH UP 13 SW11 SW16 R16 R17 R18 R19 R20 R66 KEY Error NO SOUND 12507 R505 R510 C510 C510 C511 R515 NO PICTURE gt R G B DRIVE Section 12506 Deflection Problem POWER SUPPLY SECTION POWER ST 5V C521 R528 RGB 9V C510 C511 R515 IF VCC C528 C526 L528 C547 VCC C518 L503 SET Maneuver defectiveness KEY Not Working No Sound DEFLECTION SECTION Vertical Horizontal Line LGE Internal Use Only 4 SMPS PRIMARY SECTION 78200 1
30. ssary 2 PAL 3 PAL M 4 PAL N 5 NTSC 6 4 43NTSC 7 Not available RY BYGA 0 15 10 10 Unnecessary RY BY AN 0 15 10 10 Unnecessary SVC 07 R Y LEVEL 0 31 16 16 Unnecessary B Y LEVEL 0 31 14 14 Unnecessary GY AMP 0 15 10 10 Unnecessary HTNo Clr 0 Color ON 1 Color OFF 0 0 Unnecessary VXO Free 0 Normal mode 1 VXO free run mode 0 0 Unnecessary VXO Stby 0 Normal mode 1 VXO Standby mode 0 0 Unnecessary Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes sf LGE Internal Use Only svc Register Range Initial PAL Initial SECAM Remark IF AGC 0 Normal mode 1 Minimize the gain of VIF amplifier 0 0 Unnecessary SVO SW 0 Internal Video out mode 1 Selected External video output mode 0 0 Unnecessary VIF SYS 0 38 0 MHz 1 38 9MHz 2 39 5MHz 3 45 75MHz 1 1 Unnecessary V LEVEL 0 7 4 4 Unnecessary OM TYPE 0 APC Voltage sample holde circuit type 1 APC detector stop type 0 0 Unnecessary OM SW 0 Normal mode 1 Over modulation measure circuit ON 0 0 Unnecessary SVC 07 OM LEVEL 0 15 8 8 Unnecessary VCO FREQ 0 255 100 100 Unnecessary AMONI SW 0 Normal mode de empasis FM detector 0 0 Unnecessary 1 SAO mode at external audio input mode AFT SENS 0 200KHz 4 5 0 5v change 1 150KHZ 4 5 0 5v chan
31. t PR Y 4 MENU OK 7EA Front Turbo Picture Sound Option Remocon LG Code NEC 3 Channel Auto prog System Storage Normal Turbo Manual Storage System Channel Fine Search Name Prog edit Copy Move Delete Skip Favorite 8 Channel 4 Picture PSM Dynamic Standard Mild Game User User Control Contrast Brightness Color Sharpness Tint NTSC System only Tint NTSC M Only XD ON OFF option 5 Sound SSM Flat Music Movie Speech User AV RF Stereo Option Treble Bass 0 100 AV RFStereo Turbo SND ON OFF Option For Middle East Aisa Africa FM Transmitter Wide Range 191ch Option Option 88 0MHz 107 0MHz 6 Timer Clock ii Off time Off On On time Pr 1 VOL 30 Off On Auto off Sleep On Off Sleep For Middle East Asia Africa 7 Special Language English Indonesia Thai Vietnam East Asia Input TV AV1 AV2 Component AV2 Option Child lock On Off Etc Sleep 8 Review Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ADJUSTMENT 1 Scope of Application These instructions are applied to CW81A Chassis 2 Notes 1 Because this is a cold chassis it is not necessary to use an isolation transformer However operating it using a transformer between the power supply line and chassis input to prevent electric shock and to protect the test instrument 2 All adjustment must be done in the correct sequence However for be
32. tter productivity it can be change in a pre permitted range 3 Environment conditions If not specified it must be done in following conditions Temperature 25 5 C Humidity 60 10 4 Power supply of SET for PAL SECAM China indonesia Vietnam CIS Market AC100 240V 10 50 60Hz 5 If not specified the receiver must be operated for more than 20 minutes prior to the adjustment 6 Signal Received the standard color signal 65dB 1dBuV PAL SECAM LG standard signal means the digital pattern PAL B G 05CH 7 If not specified APC ON is APC CLEAR DYNAMIC 3 AGC Voltage Adjustment 3 1 Necessary Instrument Digital Multi meter 1 set Max Input Current Over 1A Max Input Voltage 500Vdc Measurement Range 10mV 100mVdc Accuracy 0 03 3 2 Adjustment Preparation 1 Input in the 75Q cable 65dB 1dB LG standard signal 2 Connect the multi meter to J105 AGC Check Marking 3 3 Adjustment 1 Press the INSTART key of factory remote control and select VPO RF AGC adjustment mode 2 Press the VOL lt gt key until the multi meter shows reading as shown below 3 CAUTION Since the signal strength can be easily changed by the condition of signal cable you need to check the signal strength frequently in order to prevent error Tuner P N Maker AGC Vol Signal Tuner Spec Remark 6700NFNS11E LGIT 2 15 0 05V 65dBu TAEA H111F Korea
33. ven to 1 CHIP IC E 1 CHIP IC 1 CHIP IC processes the input IF Demodulates Picture and sound information and gives analog R G B output for Display and SPKL R as audio output this sound output is further Amplified and feed to speakers E Sound Amp Sound amps LA42102L is and Audio Amplifier it amplifies the output sound signal from Surround ic LC75024E and feeds to speaker which generates Sound 9 CPT DRIVE SECTION CPT Board Circuit 16100 16101 R GB AMP CIRCUIT The CPT BOARD assembly is composed of discrete type RGB Amplifier Amp Gain is defined by Resistance of R917 R912 R923 High Frequency compensation is made by inductance of L901 capacitance of C907 C904 and C902 DC level of emitter of Q901 Q902 and Q903 is defined by R908 C904 R922 See VIDEO PROCESSING ana SECTION 1GS SECTION L901 180V Lu DISCHARGE T6101 PROTECTION CIRCUI R G B Signa ONE SIGNAL R G B L902 L903 L904 NO PICTURE CPT gt ONE SIGNAL Dead R G B MISSING p prie cun gt CPT e GU gt A 16002 CB L904 O CPT CIRCUIT VCC GND i R921 Vec 180V GND 5 Hoo ov AW R908 C904 R922 D902 food Spot Killer CIRCUIT Heater Voltage C901 R902 D903 FR932 e GUN Dead e GUN LIFE SPOT amp TRAY DECREASE Copyright 2009 LG Electronics Inc
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