LCD TV SERVICE MANUAL
Contents
1. ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC 606066 3 Exp c eer ee eS SS lt 4 m ESS IC101 TSAHAYA m Jm ST 3 BV L 2 9 By aN Man et of AT24C64AN 105U 2 7 29 83931 L144 2 HH 1M2012 601JT R1087 gt 38 H 15723 37 ISAHAYA ISAHAYA z xo 8162 8 5232 _ a3 D600 1 0601 1 D602 1 2 RSe3ec Txb Bios PANEL KB 5 ENKMC2837 T118 2837 112 ENKMC2837 T112 249 Q lt PAL 17 100 6 LELELELECELE LELEL EL EL ELE m c KCN DS 0 0088 KEC PaL PIA 00 E EE L10 soo IE T y Y ST_5V uN 81088 917 100 gt 5 cot2. HH 1M3216 501 05226 0601 c 7 C123 2 2uF 0251 07 100 0 tuF e ZEN ST 3 3V 505206 lt 17 Le T 01994 350 0 lt lt lt 8169 A 100 ui 12103 9 d 50V 1 9 1 74275 our R165 33 T Patre eurem T ST S43V gt 5 scL_1 lt 96 061 A 2 8147 e T 296 SECAM L 5 gt PC_Rt GND cu C105 ST 3 L 0 AUE 160 2 e 9 9 9 9 9 9 9 9 edi L Is I ities ae uL LUE ROS C464 200650V E T 38 um 5 5 44 5154 SIS g 900845304 I iN 3 5 lt Selection 6 C655 um m 9000090900 E 14 31818M 1M n Im dai 999999 9 1 29 Slul ala anal 5 6 21 isis ST_3 3V c I I VI 9895 4 25 1575 a PC HSYNC c148 C148 Slzisi amp giaz 592920955 5 S S 2 8 g 5 2 8 a a 8 x zzz xx ii1B5B88s fe T y 1 50V L107 0 4uF gt gt gt gt gt gt gt gt gt gt 2C gt gt gt gt gt gt gt gt gt gt
3. X X x x P250 17 19 connector 19507WR 30 3 SV PANEL 12V PANEL HH 5V PANEL L252 1M3216 501 PANEL CTL R400 OPT 1 5216 501 12 9252 25038755 9251 2 5V 3 P254 15 connector 12507WA 20 3 3V_MST FH12K1 508 0 58H P253 20 connector ISAHAYA 8 0250 1 2563052 C ISAHAYA B 9252 1 25 52 0401 KDS181 KEC G400 AMP MUTE E N CVM8 M KDS181 25 15045 R409 OPT R408 4 7K 2 C CC 0402 vv 2SC38758 E ISAHAYA C ISAHAYA G400 X 1 0402 1 25 1530 112 1 2563052 100uF 0 192 16V 50V c273 C274 zz THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK ESSENTIA HAZARDS WHEN SERVICING IF IS THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC L400 HH 1M3216 501 12V AMP 20 1 MSTS6E585 BLOCK
4. CONTROL SMAW200 03 L261 1B 152012 080JT gt 4 KEY CTL O L262 15201 WY ZIN 4 KEY CTL 1 100pF 100pF 17 SMAW200 05 1270 HH 1M3216 501 L271 iB 182012 0B0JT 4 LED AM1 1 LED GA4 1 RS232C TXD C271 100pF 100pF C270 A EX LI 100pF R273 KST3906 MTF 9254 LED_AM LED_AM KST3906 MTF G253 ST_5V 12505WS 04A00 1 RS232C_AX0 MLIDEL BLULK 1 L iev MI I CM R SOUND P lt R SOUND N C OL MARK OF CIAL FEA TURES IMPORT HE AND E ECTRICAL SH ENTIAL 1 CRITICA HAT ONLY MAN COMPONENTS Speaker Headphone HIS SCHEMETIC ANT FOR PROTEC OCK HAZARDS WHEN SERVICING DIAGRAM INCORP FROM PVDDPR 2 9 C407 4 7uF 3216 C408 TPT SS OUTPR PVSSR 2 PVSSR 3 4 7uF 16V PVSSR 4 PVSSR 5 OUTMR UFATURES SPECFIED PARTS BE U F IN THE N SYMBOL MARK OF TH PVDDMR PROTN 9 9 9 SLEEPN DVSS CKIO IC400 YDA138 EZ D 3 gt HEADPHONE OUT R REFA PVDDREG vRE
5. JJO NO 4 18 EXPLODED VIEW TTT TE 0 III M NER __ _ III C 20 EXPLODED VIEW PARTS LIST Note Safety mark Frame Assembly 15051 LP68A 15 15LS1R NTSC 883 LINKE _ o eener osmero sue rr renano 21 ST 3 9
6. 5 21 5 10 5 1 666666 666 666688 66 101245 M 08L3 4 YL SWITCH_T YLIOUTER C 9 5 YL GND e 20945 9 5 68 20820 5 68 gt m m MADR MADE gt Y MADATE gt MADR 101242 MAX232ACSE M gt MADR 1243 L860 n gt MADR HH 1M3216 501 A 5 20808 0 MADAT gt MADR gt MADR CIO MADR gt MADR gt MADR gt MADR E SPRING MADA WADA gt MADR T_TERMINAL 4 MADR gt MADR m DI DI R A M PEJO24 04 SOUND M ADR ADR or nj Qj N 0 8844 _ gt MADR B_TERMINAL 4 8 2k rem M ANA 9s PC SOUND R T SPRIN THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES num M Nu 0825 SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES MADR O 11 R SPRING rum lo ima mel FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS gt ju ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR TAL FEATURES IMPORTANT PROTECTION FROM RADIATION 5 68
7. GND_9 C184 0 8104 47 C1574 10 470 BIN1P vooP_1 9 tue Serial Flasn c ST 1 BV C100 soy COMP Pb 7 R105 47 C158 10 047 6 BINIM ALE 100 A164 0 tuF COMP_Pb E1004 eo 50 e 15 8 50v C103 SOGIN R103 47 61954 1000pF gg SDGINT RDZ P e 100 8158 COMPONENT Tue i i 106 47 C106 0 047 C ae GINIP WAZ pd m 2 100 8157 PANEL2 ES SS SS 7 COMP_Y compy 2107 AA AT 6107 0470F ga GINIM 017 _ LED GR1 2 8108 47 C108 10 04706 ADIS 8180 100 E 7 5 VVV C L60 MM Si pr P109 A 47 C109 0 o47uF 8IM4M 5 R158 ly A d 0410 a7 C110 ORT BINOM ADIA pod i 8193 E NUNC 4 5 6111 0 047 C gg BINOP AD 3 4 8194 9 leu BET 6 R112 a7 C112 10 047uF 6IM0M 012 R195 0 6 e PANEL CTL 2 _ 8413 var C113 o o47uF GINOP AD p4 506 tus 47 C114 10 047uF SOGINO ADIO e 51 3 3V E D651 5V_DSUB VGA _ 115 47 C115 0 047UF RINOM 11 RA100 8 2 m B1 p47 C116 O 047UF gg RINOP MADRI 10 100 25 lt 8 TEES 2 C104 10 106 AVDD ADC MADRIS FI 4 R191 100 AAs 30V GND 3 8 C we 3 tel R1
8. lucus THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC HE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF 15 MODEL C3 ENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MLIDEL eH 2252 CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC T TERMINAL2 WAFER STRAIGHT PWA_ONOFF 1 PWR ONOFF _1 PWM_DIM 4 0900 290387559 0 10 20 LIPS BY HB 182012 0B0JT 20 LIPS 8933 4 7K DIMMING CTL 9909 20 LIPS R909 1 47K 15 17 LIPS ANN 9309 C ISAHAYA G900 4 25 3052 177 LIPS 15 47 LIPS e 0901 2SC3875S OV VOL T AGE 3 SV PANEL 8930 0 47 CM K1A78p33r 3 3V PANELI 1 900 51117 33 1904 11 33PIC HH 1M3216 501 Eai L 3 3V PANEL INPUT OUTPUT Try 3 2 1 M904 GND 49208000098 C910 DIP 100uF 25V 1 901 LD1088D2T18TR 4 E 25V 15 3 LCL 157 5V MC I 5V 2O LPL 4 3 12V 20 4 3 5V X JA700 PPJ208 01 1 O SPHING 1 C LUG L lt 10 C LUG L C
9. 7 A ue Device Load Blank Program Verify Erase Config Connect Dis Con G Read filexxx bin x Hex files File Status Checksum Unused Bytes Start Addr 0x00 OxFF End Addr Batch File Elapsed Time I2c Printer 138KHz 5 Click Auto tab and set as below and then click H MStar ISP Utility V4 0 8 1 4 E Device Load Read Auto 4 Blank Program Verify Erase Config Connect Dis Con Source File filexxx bin ReConnect v Blank m OK v Read File Pre Checksum v Verify v Exit ISP File Area Erase Area First Printer 138KHz l l 1 l 1 Erase Device l 1 l l I Partial Erase l Elapsed Time 12 6 After downloading check OK message 3 Main PCB check process APC After Manual Insert executing APC 3 1 ADC Process 1 PC input ADC 15inch only 1 Auto RG Gain Offset Adjustment a Convert to PC in Input source b Signal equipment displays Output Voltage 730 mVp p Impress Resolution XGA 1024 x 768 60Hz Pattern gray pattern that left amp right is black and center is white signal Refer below picture Model 60 Pattern 28 at MSPG925L c Adjust by commanding AUTO_COLOR_ADJUST OxF1 0x00 0x02 instruction 2 Confirmation a We confirm whether 8 address of EEPROM 4 is or not b If Ox8C address of EEPROM OxB4
10. Video CVBS S Video 3 Component YPbPr 4 RGB 1024 x 768 60 2 15 only Display and Sound check is executed by Remote control 4 Total Assembly line process 4 1 Adjustment Preparation 1 Above 30 minutes Heat run in RF no signal 2 15 Pin D Sub Jack is connected to the signal of Pattern Generator 4 2 Confirm color coordinate of RGB 15 1 Set Input to RGB 2 Input signal XGA 1024 x768 9 60Hz Full white 216 255 gray level 85 IRE Model 60 Pattern 78 at MSPG925L 3 Set CSM Cool 4 Confirm whether x 0 276 0 03 lt 0 283 0 03 y 180 or not 4 3 Confirm color coordinate of Video 1 Set Input to Video 2 Input signal CVBS NTSC 60Hz Full White 216 255 gray level 85 IRE Model 201 Patter 78 at MSPG925L 3 Set APC Clear ACC Cool 4 Confirm whether x 0 276 0 03 y 0 283 0 03 y 180 15 Y gt 250 20 or not 4 4 Confirm color coordinate of Component 1 Set Input to Component 2 Input signal Component YPbPr 480P Full White 216 255 gray level and 480P Model 212 Patter 78 at MSPG925L 3 Set APC Clear ACC Cool 4 Confirm whether x 0 276 0 03 y 0 283 0 03 180 15 Y gt 250 20 or not 4 5 Other quality 1 Confirm that each items satisfy under standard condition that was written product spec 2 Confirm Video and Sound at each source 1 Video a Select input Video S video and check whether pictu
11. 31 31 rona 31 99 gt __3___ Area Option A B PAL A 0 FACTORY MODE OFF 1 FACTORY MODE ON Caution FACTORY MODE ON only used in factory B default Option setting 1 4 The other Area Option setting Reserved Caution Initial Setting of Area Option is 1 0 in production line After IN STOP Area Option will change 0 0 If Area Option isn t 00 after IN STOP must change to 00 Using gt key on R C NTSC S Am For South America Korea For Korea Item Condition Remark 2HR OFF 0 2 Hour off option OFF 1 2 Hour off option ON FACTORY MODE EB 0 EEPROM Write Protection On 1 EEPROM Write Protection Off 1 Channel Mute On 5 Adjustment Command 5 1 Adjustment e e amer conen va 4 7 44 EEPROM ALL INIT EEPROM Read EEPROM Write COLOR SAVE R G B cutoff Drive Contrast Bright AUTO_COLOR_ ADJUST CHANGE COLOR TEMP FACTORY DEFAULT INPUTCHANGE 2 NIO gt 00 100 00 100 00 100 00 100 0 FF 0 FF 0 FF 0 7F 0 7F 0 7F 0 SF 0 64 02 0 1 2 3 00 FF Description EEPROM all clear EEPROM Read EEPROM Write by some values Color Save They have different range each mode FOS Adjustment Drive adjustment Offset adjustment od AD Auto COLOR 0 COOL 1 NORMAL 2 WARM 3 USER 00 Factory mode off FF Factory mode On I
12. LUG L 20703 2707 5 68 OPT 20704 1P_CAN2 e 5 68 CONTACT Li O SPHING gt _ COMP_Pr COMP AUIN L THE SYMBOL MARK OF THIS 9 70701 5 68 20700 5 68 Y SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICA 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 10500 20030 PAL M TUNER L504 HH 1M3216 501 5V TUNER COMP AUIN R 6 0500 25 755 PAL E 15V c503 zz R500 10K SECAM L O 1uF I 8916 m 10K e Fairchild 9904 KST3904 lt lt gt gt 8 0904 1 2339045 15V Sw 10908 KIA278R12PI M900 49209000098 9929 91 2 16905 KA78M05 R 45V 5VL R931 91 OW EE 1180 5V TUNER 2 916 2 100uF 25v 16909 BA33BCOFP E2 OUT vec C908 0 10 I 3 3V_SDRAM 100uF 1 129 16910 2 ne SIF OUT 5
13. is a flammable mixture Unless specified otherwise in this service manual lubrication of contacts in not required 5 Do not defeat any plug socket B voltage interlocks with which receivers covered by this service manual might be equipped 6 Do not apply AC power to this instrument and or any of its electrical assemblies unless all solid state device heat sinks are correctly installed 7 Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 8 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist st
14. isn t we adjust once more c ADC result is displayed to or on left and lower of the screen d We can confirm the ADC values from 0x00 0x05 addresses page OxB4 2 Component input ADC 1 Auto Component Gain Offset adjustment a Convert to Component in Input source b Signal equipment displays Output Voltage 700 mVp p Impress Resolution Component 480p Pattern 8color amp 16gray pattern Refer below picture Model 212 Pattern 8 at MSPG925L c Adjust by commanding AUTO COLOR ADJUST OxF1 0x00 0x02 instruction 2 Confirmation We confirm whether Ox8E address of EEPROM OxB4 is or not b If Ox8C address of EEPROM OxB4 isn t OXAA we adjust once more c ADC result is displayed to on left and lower of the screen d We can confirm the ADC values from Ox00 0x05 addresses in page OxB4 Manual ADC process using Service Remocon RGB amp Component Mode After enter Service Mode by pushing INSTART key execute Auto RGB by pushing _ key at Auto RGB Auto Color Balance ADC RGBOOK CPNT OK Auto RGB To set Red Offset Green Offset Blue Offset Green Gain Blue Gain Reset Before ADC RGB N A ADC CPNT NA After ADC RGB OK ADC CPNT OK 3 2 Function Check 1 Check display and sound Check Input and Signal items 1 TV 2
15. 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 1MQ 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 measurements for each exposed metallic part Any voltage measured must not exceed 0 75 volt RMS which is corresponds to 0 5mA In case any measurement is out of the limits specified there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer Leakage Current Hot Check circuit AC Volt meter Good Earth Ground such as WATER PIPE To Instrument s CONDUIT etc exposed METALLIC PARTS 1 5 Kohm 10W SERVICING PRECAUTIONS CAUTION Before servicing receivers covered by this service man
16. 00 CC gt 2 81081 81078 HH 1M3216 501 10uF Boy a xxrj 6 oo ojjojojo o n e o oo6joj 6 a3jajaaaaaaaaziz sjaaaajaaaaajaizizi gt ala ik ae 81077 81075 a OPT 1K wo CV ao I ow wu AXCKN 8 Es E 25 5 55 5 81098 OPT oy gt gt PC VSYNC AXCKP VODC 3 R1007 GND_1 GND 10 o r 81080 81078 81076 81074 E RXON IRIN A188 100 8657 0 INT e R165 18 2 1 DDCA SCL VDD DVI 1 DDCA CK 8184 33 gt gt DPM_DET C656 ADS ed eo SCL 6 _ __ 3 5 137 144 RX1N DDCA DA 8185 33 OPT TOA 1ourz2 0 iuF RX1P DDCR CK gt 8186 33 HH 1M3216 501 16V 1 m 12 GND_2 DDCR DA ied 8187 33 2 ro Pwo e ki gt 8X2M 8189 OPT D RXeP PWMO 8196 100 0145 0 8139 eg 00 012 SAR i E 8197 100 1X L sov T 390 REXT C100 SAR2 i Riga 0 i R138 OPT DDCD_DA L SAR1 e R190 400 1 1 KEY CTL O 2 E D SARO R199 100 1X 2 KEY CTL 1 2 pac 8140 HSYNC1 MSIS6585 500 m i LTD o pac Pita A VSYNC1 CSZ gt VCLAMP SDI B 6 152 1uF REFP SCK gt 191201 gt SPI CLK as 5 C102
17. 16 e Heje jejeje 42495 gaaja lt lt lt 9 HH AMO 6 50 gt 0 15 ME 3 n 0 521286 gt m 9 3 3V MST SDRAM amp X C1090 C148 8558 18 88 0 1uF our 1047 220 53 I 100 dad Ed Snrs 9 C185 2187 C188 gt T o tur a0 4uF Io tur 4543 45 20 zy j 2025 dd ST 1 BV 885524 lt 2 E ve Ue MGR ee 2 4 an gt gt 68 gg ac 01391 C1091 MULTI OPTION igo EVE sp 1 lt lt 16V 102 MACRONIX Et I MX25L4005AM2C 126 ecc 81063 100 AUDIO SPI CZ t cs vec 91064 0 10 Mp SPI DOL DO HOLD 81065 810690 7 N SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES E 100 E ST_3 gt AX36645503 0 SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS GND 010 I 15 0 15 0 3V_SDRAM 12300 ESMT 3 3V_SDRAM M12L16161A 5TG SHRINK 0 11UM TACEN E SPRING 9 061 T TERMINAL1 HP DET p Luca B TERMINAL 1 R837 B Ohm Speaker 9 5 S VIDEO C 15
18. 43 9 eg 5XX0 V006 2 C181 T 0 10 e C _ 1 8144 0 e GND 8 eus 4 7 1650 8 PC 8125 OPT C1254 qOPT VODM 5 45196 ocn zs M2ACO2 WMNGT 126 C1264 7 7 89 ISAHAYA S Video R127 NAI 6107 0 047 C ae 6 BEEN gt D650 1 p E R128 47 C128 10 047uF YO MADR SI 3 MADR ENKMC2838 T 112 VIDEO YI c 8 S ViDEgoY P129 47 C129 fo o47uF 1 41 COANE Al R130 1301 CVBS3 3 MADATS E E oer ee cisse von TOUR THE SYMBOL MAPK OF THIS SCHEMETIC DIAGRAM INCORPORATES PAL eo CVBS eee R132 47 13 0 047 C gg _ 0755 1 Hesolution H1072 81008 81004 81005 PDZ PANEL1 2 SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X RADIATION 2 8133 47 C133 0 04706 VCOM1 MADR O MADATO 640X480 4 7K 4 7K H W un H FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS 5 IF VIDEO OUT 800 600 H E IF TESA EE T EHE x x chm L ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MENS 5 7 cvas out TE is DE manto 1024 768 2 O hii x THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC m 3 3
19. 500 Fail 1 defect part Pass Check the signal of R103 R104 Change R103 R104 R106 R108 R106 R108 R132 1822 Fail R132 L822 L800 L801 L800 L801 Pass Check the Re solder or change the defect part input output of IC100 Faj Check X100 Pass Check inputting source cable and jack 16 Check the input source A Change source input Fail Re solder or Change the defect part Check the input output Fail Check X100 of IC100 Check the input output of ICA00 Re solder or change the defect part Fail Check the speaker gt Change the speaker Fail Pass Check the speaker wire BLOCK DIAGRAM JOJUOD HI 05 I Jexyeedg jexeeds 4 Jo guon a e gt Jeun 126 104410 indino uondo 5 V05 19S 110 415 4l j SINT 31 Idol ILL a 03 I A 0 809 031 Ho jueuodujo5 qns d O9pIlA S Sg8AO 5 5 5 5 5 2578 2570 73 INOQ 19 SseJppy 19 629 105 4 98996151 7 rjgo A lt prop Pd gt e E 99 6 15 LAs AS AS I 090098 irm 1LO WIC
20. D SPRING IG R880 5 S VIDEO DET e HEADPHONE OUT R C LUG3 IG 5 S VIDEO Y e HEADPHONE 8881 15 NAL2 IL C303 0 106 51 R838 15 2 0 047uF Ohm Speaker SHIELDLIPLATE 70803 20805 5 68 5 65 TP1241 TP124 ZDB04 20806 5 Speaker RS837 R838 R880 88 1 Speaker 1 66 66 66 66 4 IX MULTI OPTION NC RFU 66 66 66 66 IC300 1 HYNIX HY57V161610FTP 6 1 RS8232C RXD 232c OPTION Expensive 1 850326 X0 PP J148 07 JAB20 1 Cheaper CONTACT 5 00 016 SHUNT_T RD1O SPRING V AUDIO R PDISWITCH T SBAO 9 A10 AP RD1GND gt 4 20823 WHIC LUG L 5 68 5 68 V AUDIO L t i WHICENTER T MADRIO ps 0 T2IN GNO DB24 E KCN DS 0 0088 KSD 4 gt 24 ae Rse3ac Tx MADRI 11 1 YLICONTACT 5 68 101 MADR 8 RDIOUTER C AO 7 1 6 A2 5 6B
21. FL C411 Se DE INL 9 miras C416 1O0uF an 16V 1 R421 1K gt HEADPHONE OUT L C419 1VC 1 I HP 9 8420 100K 1 PVDDPL OUTPL PVSSL_5 PVSSL 4 HP_DET 2m ao R422 OPT 2012 AUDIO L _ V55 3 PVSSL 2 PVSSL 1 OUTML e 1404 30UH 8423 2012 gt L SOUND P PVDDML L403 30uH 1 R416 PT R415 100 95 3 H SOUND P Option gt L SOUND_N 2400 SMAW200 04 us RH SOUND N I Ox oo I dw L SOUND P j L SOUND_N C421 1000pF LG Electronics Inc Mar 2007 P NO MFL37762601 Printed in Korea
22. Standard 5 Reserve after operation Above 30 Minutes 6 Adjustment equipments Color Analyzer CA 210 or CA 110 Pattern Generator MSPG 925L or Equivalent DDC Adjustment Jig equipment SVC remote controller Download 1 Execute ISP program Mstar ISP Utility and then click Config tab 2 Set as below and check the following tabs Port type Choose the your port type Normally LPT1 or LPT2 Speed Choose the speed from 70 to 99 JIG Choose the your JIG type Normally Mstar or LGE and then click the Apply MStar ISP Utility V4 0 9 5 os Te Device Load Read Auto Blank Program Verify Use USB E2PROM Device Setting SCL in ort Type out SCL out ee Roughly Speed 138 KHz Base Addr Ox3BC PIN SPI Setting Ti Auto Detect E v Reverse High USE SPI v pin 1 switch UART I2c En Speed 50 4 b Pull all Pin High Speed 50 Elapsed Time 03 05 I2c Printer 138KHz Flash Status 00 3 Click Connect tab If flash memory is detected normally Flash memory type will be displayed Example MX25L4005 MX or Winb25X40 Winbond etc H MStar ISP Utility V4 0 9 5 SA 74 24 S7 Device Load Read Auto Blank Program Verify Erase Config Connec Dialog Device Type is MX25L4005 E Elapsed Time I2c USB 170KHz 4 Click Read tab and then load download file XXXX bin by clicking Read H MStar ISP Utitity V4 0 8 1 gt
23. V 1 AV2 Component RGB 5 2 EEPROM DATA READ 1 Signal Table Delay 100ms 128 Bytes 2 Command Set Adjustment Contents CMD hex ADR hex ADL hex Details EEPROM READ E7 0 7 Read 80 FF Read A2 0 7 Read 80 FF Read A4 0 7 Read 80 FF Read A6 0 7 Read 80 FF Read Purpose To read the appointment Address of E2PROM by 128 80h byte 5 3 Data Write 1 Signal Table LEN 84h Bytes CMD 8Eh ADH E PROM Slave Address A0 A2 A4 A6 A8 Not OOh Reserved by BufferTOEEPROM ADL E2PROM Sub Address 00 FF Data Write data 2 Command Set Li Austen contents EEPROM WRITE 16 Byte Write CL Purpose 1 EDID write 16 byte by 16 byte 8 order 128 byte write 00 7F of EEPROM Page 2 2 FOS Default write 16 mode data HFI VF STD HP VP Clk CIKPh PhFine write 3 Random Data write write the appointment Address of E2PROM 5 4 VRAM Read 1 Send CMD 70h to read Video RAM value from MICOM And save its value to 128 Bytes Buffer Common Buffer for the use of EDID _ _ 12 5 2 Delay 500ms Time to wait and read vZideo RAM from MICOM 3 Be transmitted the contents of MICOM s 128 bytes Buffer to PC 128th Data is the CheckSum of 127 bytes data That s OK if the value of adding 128 bytes Data is Zero 12 6 Sign
24. V TUNER E KEC 9507 25 15048 C ISAHAYA E as08 4 ISAHAYA 2803052 0507 X4 2SA1530A T112 1R SYMBOL MARK OF THIS SCHEME SPECIAL FEATURES IMPORTANT FOR PR FILRE AND ELECTRICAL SHOCK HAZARD ESSENTIAL THAT ONLY MANUFATURES S TIC DIAGRAM INCORPORATES OTECTION FROM X RADIATION 5 WHEN SERVICING IF IS PECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE N SYMBOL MARK OF THE SCHEMETIC R512 150 PAL E 9504 254415045 B E 9501 25415045 B KEC 0501 1 25 1530 112 1 ISAHAYA B CVBS OUT T ION 3 3V_MST THE N 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 SYMBOL MARK OF THE SCHEMETIC 10807 7 12 70500 1 TAFT HOO3F 15V TUNER 8506 270 IF VIDEO OUT 8508 C511 SHIELD MODEL IBLOCK TUNER i NC NTSC TUNER A OUT SIF OUT 42V_PANEL opel Panel option 3V PANEL L250 HH 1M3216 501 PANEL OPTION2 LPL15 5V cPT1513 17 19 MFT 5V 20 4 3 12 20 4 3 5v Connector P254 P254 250 0 Peso 253 P253 x Lest 0 X 1 252 x x R252
25. V MST EN e Ab PASZ 6 1280X1024 x O ohm 0 onm L L PAS L102 8 _50 140 C143 D JE 10uF 210 L110 HH 1M3216 501 15V 50V 5 gt i a lt I LC I II r mjau o ojo 1 3216 501 LIIILI lt lt CI 515 51519 5 15 4 2223222 42 2 6982833 2 ad ES ed el bard aard rd LSI ES 21 61 3319343 2 2 TIS 3 3V MST C456 0 tuF ee 5525 21212 98 4 7 39 R1052 22 10 8 SIF_our SS 4884448 C6 dass 8 5 e 8105 22 See C417 11 o D 8833841 gt sg VV VEA 4 45555 8888 3888 ETE VANE C SOVT 160 ai aj 2 2 25 5 3366666 1056 AA lt lt aot TAIT oes gt MLK Suse je 81057 47 9559 995 5 lt 8 E g glg SDRAM 3 Sis R1058 a COCKE 9 gt Dam cc R1061 SE pd 81062 OPT a 218 534 5599 Lass ms 090 lt lt lt lt lt has al aaja xxxix zn 41414
26. al Timing Resolution 15 Section Polarity DOT Frequency Total Period E Display A Front MHz ur 5 Aem Aem E A sm omm s Pros me V Lines 60 004 768 NEN C Sync D 1 1 1 2 2 3 8 8 6 Back Resolution Remark Porch TROUBLESHOOTING No power A Process LED indicator off Check 15V or 5V Check short of main B D of LIPS or Change LIPS Pass Check Output of Change Q904 0904 Pass Change 1 903 Fail Check Output of IC903 Check LED Assy gt Change LED Assy Fail Check P901 P270 Connector gt Repeat A PROCESS Fail Check LED Status on display unit Check IC900 IC901 IC906 IC908 IC909 1 910 Change 1 900 1 901 1 906 p Fail IC908 12909 12910 Check the input Output of IC100 3 Change IC 100 Fail Change inverter connector or inverter Check inverter connector or inverter Fail Change panel link cable or module Check panel link cable or module Fail Check inputting source cable and jack 2152 No Raster on AV Signal Component CVBS S VHS No Raster on TV RF signal Check 5V of TU500 J Re solder or change the Repeat Check the output rocess Fail of TU
27. e ID2 GND S T GND RED GND Green GND Blue GND 10 D GND 11 IDO GND 12 SDA 13 H Sync 14 V Sync 15 SCL Shell GND 3 Control Function 1 Contrast Brightness 2 H Position V Position 3 Tracking Clock Phase 4 Auto Configure 5 Reset 4 Optical Characteristic Min Tpy Max 2 Luminance Luminance cd m 850 8350 APC Clear ACC Cool White Lumnance Uniformity 75 80 White 100 IRE Contrast Ratio 2400 3000 All whit All black Set up Level 0 IRE CIE Color Coordinates 0 298 In Video input 0 314 APC Clear 0 270 White 85 IRE 5 Outgoing Condition 2 jVoumelevel 8 8 Main Picture input Main Last Channel Mute Channel Auto Programme Manual Programme Favourite Programme PICTURE Contrast Brightness Sharpness Normal Reset SOUND DASP Flat Music Movie Sports User Balance r TIME Clock On time Auto off Off SPECIAL Language 3 Languages Key lock Off Caption Text Mode 1 Mode 2 Text 1 Text 2 Off gt 4 ADJUSTMENT INSTRUCTION 1 Application Range This document is applied to 15 20 LCD TV chassis LN71A 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
28. ety parts should be replaced with the same components as recommended in this manual to prevent Shock Fire or other Hazards Do not modify the original design without permission of manufacturer General Guidance An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks It will also protect the receiver and its 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 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
29. ing 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 2 Bend the two remaining leads perpendicular y to the circuit board 3 Observing diode polarity wrap each lead of the new diode around the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect on the circuit board copper side the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures Circuit Board Foil Repair E
30. ist 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 SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 1 General Specification POWER INPUT MENU ENTER VOL lt gt CH A V 5 Power Cord Length 1 87 0 04 M NATION Shape Wall out Color BLACK Power Adee LCD Module Feature Maker CPT 0 297mm H x 0 297mm V x RGB 326 6 W x 253 5 H x 14 0 D EAJ36404601 Typ 5ms F T 6ms 2 Mechanical specification 1 Product Dimension Width W Length D Height H Se Loading Indi Wooden Indi Wooden Quantity 858 720 Base detachable 302 2 W x 166 3 D x 68 H 8 0 3 102 Target 1 5Kgf 0 8Kgf 2 0Kgf NON NON Appearance General Refer to Standard of LG 55 G1 1020 3 Engineering Specification ENERGY VIDEO POWER CONSUMPTION LED COLOR Stand By lt 10 lt 1W 220V 2 D SUB RED Green 10 Digital GND Pin configuration Blu
31. m 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 25cm brush with a metal handle Do not use freon propelled spray on cleaners 5 Use the following unsoldering technique a Allow the soldering iron tip to reach normal temperature 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 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
32. printed foil d Closely inspect the solder area and remove any excess or splashed solder with a small wire bristle brush IC Remove Replacement Some chassis circuit boards have slotted holes oblong through which the IC leads are inserted and then bent flat against the circuit foil When holes are the slotted type the following technique should be used to remove and replace the IC When working with boards using the familiar round hole use the standard technique as outlined in paragraphs 5 and 6 above 1 Desolder and straighten each IC lead 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 Heplacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to the areas Small Signal Discrete Transistor Removal Replacement 1 Remove the defective transistor by clipping its leads as close as possible to the component body 2 Bend into a U shape the end of each of three leads remaining on the circuit board 3 Bend into a U shape the replacement transistor leads 4 Connect the replacement transistor leads to the corresponding leads extend
33. rap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static type solder removal device Some solder removal devices not classified as anti static can generate electrical charges sufficient to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ES devices 6 Do not remove a replacement ES device from its protective package until immediately before you are ready to install it Most replacement ES devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device will be installed CAUTION Be sure no power is applied to the chassis or circuit and observe all other safety precautions 8 Minimize bodily motions when handling unpackaged replacement ES devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot fro
34. re is displayed or not b Select input Video CVBS and check whether picture is displayed or not c Select input Component 480P and check whether picture is displayed or not 2 TV Select input TV and check below item In Gumi factory 4 US 04 Stereo Sound Check CH30 US 30 Dual Sound Check 2 US 02 Stereo SAP Sound Check Caption Check 3 RGB PC DTV 15 only Select input RGB and check whether picture is displayed or not 4 Component Select input component and check whether picture is displayed or not 10 4 6 Power consumption confirmation 1 Check if Power LED Color and Power Consumption operate as standard 2 Measurement Condition 230V 9 60Hz Analog 3 Confirm Stand by operation 4 7 DDC EDID 1 Connect D sub Signal Cable to D Sub Connector 2 Write EDID data to EEPROM 24C02 by using DDC2B protocol 3 Check whether written EDID data is correct or not refer to Product spec 4 8 Outgoing condition Configuration 1 After all function test press IN STOP Key by Service Remote control And make ship condition 2 When pressing IN STOP key by service remote control green and red LED are blinked alternatively And then Automatically turn off Must not AC power off during blinking 4 9 Option data setting SVC OSD setting NTSC Service Mode OPTION DATA According to Suffix 15LS1RA MK 20LS1RA MK 3970 1920 nep cowowNr
35. ual and its supplements and addenda read and follow the SAFETY PHECAUTIONS on page 3 of this publication NOTE f unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication always follow the safety precautions Remember Safety First General Servicing Precautions 1 Always unplug the receiver AC power cord from the AC power source before a Removing or reinstalling any component circuit board module or any other receiver assembly b Disconnecting or reconnecting any receiver electrical plug or other electrical connection c Connecting a test substitute in parallel with an electrolytic capacitor in the receiver CAUTION A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard 2 Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device DVM FETVOM etc equipped with a suitable high voltage probe Do not test high voltage by drawing an arc 3 Do not spray chemicals on or near this receiver or any of its assemblies 4 Unless specified otherwise in this service manual clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner cotton tipped stick or comparable non abrasive applicator 10 by volume Acetone and 90 by volume isopropyl alcohol 90 99 strength CAUTION This
36. website http biz L Gservice com LG LCD TV CHASSIS LN71A MODEL 15LS1RA 15LS1RA MK CAUTION BEFORE SERVICING THE CHASSIS HEAD THE SAFETY PRECAUTIONS IN THIS MANUAL 5 CONTENTS M 2 PRODUCT SAFELY orrie M 3 SERVICING CC VII0CM 5 4 C 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 14 CC I 18 EXPLODED M 20 HEPLACEMENT PARTS LIST aae 22 __ L _ __ _ 8 lt 6 6 6 6 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 saf
37. xcessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or lift off the board The following guidelines and procedures should be followed whenever this condition is encountered At IC Connections To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board Use this technique only on IC connections 1 Carefully remove the damaged copper pattern with a sharp knife Remove only as much copper as absolutely necessary 2 carefully scratch away the solder resist and acrylic coating if used from the end of the remaining copper pattern 3 Bend a small U in one end of a small gauge jumper wire and carefully crimp it around the IC pin Solder the IC connection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on the component side of the circuit board 1 Remove the defective copper pattern with a sharp knife Remove at least 1 4 inch of copper to ensure that a hazardous condition will not ex
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