LG DP351G Скачать руководство пользователя страница 13

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LCD PART

3-2

Only for training and service purposes

LGE Internal Use Only

LCD ELECTRICAL TROUBLESHOOTING GUIDE

YES

Display condition?

Inverter abnormal

Appear shadow form
interference in black background

Fuse normal?

Fuse Replace

YES

+7.5V, 15V, -10V

D906, D901, D902

YES

+5V normal?

IC(U902) Check and Replace

YES

R G B signal output?

Check and Replace

MPEG1389LP (Pin107, 108, 109)

YES

VCOM signal?

(Vip 4.5)

IC(U901) Check and Replace

YES

LCD MODE

CONT signal? All “LOW” (Normal

condition?)

MAIN B/D Check

YES

TFT LCD

pressure voltage? +3.3V, +5V,

+15V, -10V

Power source and

L9020R, L901, D901, D902 check

YES

TFT LCD normal?

Replace

YES

Color

adjusting normal?

Readjust as adjustement standard

YES

Each connector?

Replace and Reassemble

YES

END

Replace

Содержание DP351G

Страница 1: ...AFETY PRECAUTIONS IN THIS MANUAL MODEL DP351G SERVICE MANUAL P NO AFN56903641 Website http biz lgservice com Internal Use Only APRIL 2008 Av Sor Juana lnés de la Cruz No 555 Col San Lorenzo Tlalnepantla Estado de México CP 54033 Tel 321 19 00 Fax 5 657549 Lada sin costo 01 800 50 481 00 ...

Страница 2: ... 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only CONTENTS SECTION 1 SUMMARY SECTION 2 EXPLODED VIEWS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST ...

Страница 3: ...t reserved Only for training and service purposes LGE Internal Use Only PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES SPECIFICATIONS 1 5 ...

Страница 4: ...d per the original design Be sure that the safety purpose of the polarized line plug has not been defeated 3 Soldering must be inspected to discover possible cold solder joints solder splashes or sharp solder points Be certain to remove all loose foreign particles 4 Check for physical evidence of damage or deterioration to parts and components for frayed leads or damaged insulation including the A...

Страница 5: ...uld be more than 1Mohm Note 1 Accessible Conductive Parts include Metal panels Input terminals Earphone jacks etc 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 ...

Страница 6: ...humidity 5 to 90 Laser Semiconductor laser Signal system NTSC CONNECTORS Audio Video Output ø3 5mm mini jack x 1 Video 1 0V p p 75Ω sync negative Audio 1 5Vrms 1kHz 0dB Earphone terminal ø3 5mm stereo mini jack x 1 LIQUID CRYSTAL DISPLAY Panel size 7 inches wide diagonal Projection system R G B stripe Driving system TFT active matrix Resolution 480 x 234 WQVGA SUPPLIED ACCESSORIES RCA Video Audio ...

Страница 8: ...LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS 2 2 1 CABINET AND MAIN FRAME SECTION 2 2 2 PACKING ACCESSORY SECTION 2 3 ...

Страница 9: ...Internal Use Only J K H I B E C D I L K J L D A G C B E A F F G H 293 295 296 277 253 272 277 A52 A45 288 288 264 278 297 262 263 809 285 285 286 282 CABLE1 CABLE2 CABLE3 281 289 A44 A00 A46 283 A48 A43 A40 A53 LCD LCD PANEL KEY MAIN A51 262 251 251A 287 EXPLODED VIEWS 1 CABINET AND MAIN FRAME SECTION ...

Страница 10: ...ed Only for training and service purposes LGE Internal Use Only 2 PACKING ACCESSORY SECTION PLUG ASS Y RCA CABLE 806 834 ADAPTER 833 REMOTE CONTROL 900 BOX 802 BOX 802A 808 BATTERY 801 OWNER S MANUAL CABLE CIGAR JACK 804 PACKING SHEET 803 PACKING BOX 802B ...

Страница 12: ...LE CONTROL WAVEFORM NO DISC CONDITION 3 22 6 TRACKING CONTROL RELATED SIGNAL SYSTEM CHECKING 3 23 7 MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF 3 24 8 MT1389 VIDEO OUTPUT WAVEFORM 3 24 9 AUDIO OUTPUT FROM AUDIO DAC 3 25 WIRING CONNECTION DIAGRAMS 3 26 1 WIRING CONNECTION DIAGRAMS 1 3 26 2 WIRING CONNECTION DIAGRAMS 2 3 27 BLOCK DIAGRAMS 3 29 1 OVERALL BLOCK DIAGRAM 3 29 2 POWER BLOCK DIAGRAM 3 ...

Страница 13: ...V D906 D901 D902 YES NO 5V normal IC U902 Check and Replace YES NO R G B signal output Check and Replace MPEG1389LP Pin107 108 109 YES NO VCOM signal Vip 4 5 IC U901 Check and Replace YES NO LCD MODE CONT signal All LOW Normal condition MAIN B D Check YES NO TFT LCD pressure voltage 3 3V 5V 15V 10V Power source and L9020R L901 D901 D902 check YES NO TFT LCD normal Replace YES NO Color adjusting no...

Страница 14: ...OCK R G B Circuit BLOCK LCD PANEL SPEAK KEY INVERTER POWER BLOCK BACKLIGHT KEYPAD BLOCK IR KEY PLAY DVD_KE Y1 DVD_KE Y2 DVD_KE Y3 DVD_KE Y4 DVD_KE Y5 ROUT GOUT BOUT VIN_6 12V PWRCTL_LCD MP2359 IC VGH 15V VGL 10V 7 5V 5V VGH VGL STVR STVL CKV UND OEV VCOMO LNR MOD OEH STHL STHR CPH3 CPH2 CPH1 89P_R 89P_G 89P_B SP L SP L SP R SP R RCR2561 IC Copyright 2008 LG Electronics Inc All right reserved Only ...

Страница 15: ...1 FB 3 SW 6 C934 100pF C934 100pF C923 104 C923 104 R905 10K R905 10K C913 104 C913 104 L9020R L9020R TP921 TP921 C943 100pF C943 100pF TP918 TP918 D908 D_13V D908 D_13V 1 2 C959 334 C959 334 C951 10uF 16V C951 10uF 16V TP920 TP920 R923 100 75 R923 100 75 C949 100pF C949 100pF D907 SS14 D907 SS14 1 2 C906 4 7u 25uF C906 4 7u 25uF TP919 TP919 R902 2K R902 2K C941 104 C941 104 C917 105 C917 105 R912...

Страница 16: ...3 7 3 8 PRINTED CIRCUIT BOARD DIAGRAM TOP VIEW BOTTOM VIEW Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only MEMO ...

Страница 18: ... No S3 3V No A 5V No M5V VCC_5V No 5VA Replace ADAPTOR NO YES 1 DC DC CONVERTER CIRCUIT Is ADAPTOR out 12V Replace D606 NO YES Is D606 OK Is U202 1 8V OK Replace U401 NO Replace U202 NO YES Is U401 3 3V OK Is Q402 5V OK Replace U401 NO Replace U202 NO YES Is U401 5V OK No power on by BATTERY Replace BATTERY NO YES Is BATTERY OK Replace U401 NO Is U401 5V OK A NO POWER ON BY ADAPTOR B NO POWER ON B...

Страница 19: ...ck MPEG IC U201 YES Replace B D E PICTURE ABNORMAL Disc error Check Disc YES YES Refer to SERVO part YES Replace B D F DISC ERROR Audio out abnormal Check Audio jack mode YES YES Check A 5V YES Check signals from MPEG YES Replace IC U502 MAIN ELECTRICAL TROUBLESHOOTING GUIDE C AUDIO OUT ABNORMAL Video out abnormal Check Video jack mode YES YES Check A 5V YES Check signals from MPEG YES Check IC U5...

Страница 20: ...for training and service purposes LGE Internal Use Only OPEN CLOSE abnormal Check SW201 SW202 switch Refer to SERVO part YES YES Check IC U201 Pin92 Check the connectin of MD YES Refer to SERVO part YES NO MAIN ELECTRICAL TROUBLESHOOTING GUIDE G OPEN CLOSE ABNORMAL ...

Страница 21: ...l NO OK Does the Video of the DVD Disc play properly Is MPEG data signal normal NO YES Check CD DVD DSP output signal Check MPEG Decoder input signal NO Is error signal normal YES OK Check CD DVD DSP output signal Check MPEG Decoder input signal NO Does the Video of the video CD play properly Is MPEG data signal normal NO Check clock signal NO Does the audio sound output normally Does the audio si...

Страница 22: ...IRCUIT Laser off Check the RFL connection between J401 and MT1389 Put Disc in NO Check the related circuit on MT1389 RFL signal NO Disc ID is correct Proper RFL signal on MT1389 NO YES YES YES Check the cable connection between spindle and main PCBA Check DMSO related circuit on MT1389 NO Does spindle rotate Proper DMSO signal on MT1389 NO YES Replace IC U201 YES A YES ...

Страница 23: ... D of MT1389 NO YES Check the related circuit on MT1389 FEO sugnal NO Proper FEO signal on MT1389 YES YES Check cable connection on pick up head Check the related circuit on MT1389 NO Track on OK Proper FEO signal on MT1389 NO Disc is play NO YES Check the TRSO connection on MT1389 and motor dirver NO Properly TRSO signal on MT1389 YES Check the tracking control amp circuit on motor driver T T out...

Страница 24: ...heck Aout_L related circuit Aout_R NO Normal Audio output when disc playback Proper Aout_L Aout_R signal on MTK1389 NO Check the related circuit of Audio DAC NO YES YES Check communi cation lines on MT1389 NO Normal IR VFD Front pannel key functions Commu nications between IR VFD Front pannel key MT1389 Front µ com is normally NO NO YES Check the cable connection on Front pannel TEST END YES B YES...

Страница 25: ...d service purposes LGE Internal Use Only MAIN ELECTRICAL TROUBLESHOOTING GUIDE Is IC U603 OK No turn on Red LED Is 8 4V of J602_Pin3 OK YES Replace IC U603 NO Is L601 OK Replace L601 YES NO Is IC U601 OK Replace IC U601 YES NO Is L602 OK Replace L602 YES NO NO 4 CHARGING CIRCUIT ...

Страница 26: ...g and service purposes LGE Internal Use Only DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1379 main clock is at 27MHz X201 FIG 1 1 2 SDRAM CLOCK 1 MT1389 main clock is at 27MHz R308 FIG 2 1 U301 PIN38 DCLK 125MHz Vp p 3 7V ...

Страница 27: ...Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 DISC TYPE JUDGEMENT WAVEFORM FIG 3 1 FIG 3 2 F U401 PIN8 F U401 PIN8 FE U201 PIN26 FE U201 PIN26 RFL U201 PIN21 RFL U201 PIN21 ...

Страница 28: ...pyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only FIG 3 3 FIG 3 4 F U401 PIN8 F U401 PIN8 FE U201 PIN26 FE U201 PIN26 RFL U201 PIN21 RFL U201 PIN21 ...

Страница 29: ...l right reserved Only for training and service purposes LGE Internal Use Only 4 FOCUS ON WAVEFORM 5 SPINDLE CONTROL WAVEFORM NO DISC CONDITION FIG 4 1 FIG 5 1 FOSO U401 PIN11 DMSO U401 PIN12 F U401 PIN8 SP U401 PIN15 F U401 PIN9 SP U401 PIN14 ...

Страница 30: ...t reserved Only for training and service purposes LGE Internal Use Only 6 TRACKING CONTROL RELATED SIGNAL SYSTEM CHECKING FIG 6 1 FIG 6 2 TE U201 PIN27 TE U201 PIN27 TRSO U401 PIN23 TRSO U401 PIN23 T U401 PIN18 T U401 PIN17 T U401 PIN18 T U401 PIN17 ...

Страница 31: ...All right reserved Only for training and service purposes LGE Internal Use Only 7 MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF FIG 7 1 FIG 8 1 U201 PIN208 ASDIF Vpp 2 5V U501 PIN14 8 MT1389 VIDEO OUTPUT WAVEFORM 1 Full colorbar signal CVBS ...

Страница 32: ...l right reserved Only for training and service purposes LGE Internal Use Only FIG 9 1 JK601 PIN4 5 MR 1kHz 0dB 9 AUDIO OUTPUT FROM AUDIO DAC 1 Audio L R 2 Audio related Signal ASDAT0 IC301 PIN3 ABCK IC301 PIN4 ALRCK IC5301 PIN5 ASDATA3 FIG 9 2 ...

Страница 33: ...All right reserved Only for training and service purposes LGE Internal Use Only WIRING CONNECTION DIAGRAMS 1 WIRING CONNECTION DIAGRAMS 1 MAIN PCB LCD PCB MAIN PCB MAIN PCB LCD PCB LCD PCB MAIN PCB LCD PCB 0 8 12Y 12Y 220mm 0 8 20Y 20Y 220mm ...

Страница 34: ...ht 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 WIRING CONNECTION DIAGRAMS 2 MAIN PCB MAIN PCB KEY PCB KEY PCB MAIN PCB KEY PCB KEY PCB 1 0 10Y 10Y 80mm ...

Страница 36: ...MHz LDO1 LDO2 IOA V20 M DISC SPINDLE MOTOR DECK MECHANISM PICK UP SLED MOTOR M F F T T SP SP A B C D E F RFO MDI1 2 LIMIT NJM4580M A 5V PT2303 A 5V SP_L R SP_L R OP OP TROPEN M5V CM1117 VCOMO CPH1 2 3 MOD 89P_R G B STHL R STVL R OEH V LNR UND CKV PWRCTL_LCD AV OUT SPK H P BATTERY SM9926K DC_IN DC DC BLOCK1 DC DC BLOCK2 3 3V M5V 2F2301P VCC5V A 5V APM4953K SP_MUTE 3 3V BAT_OUT AD_T AD_U P AD_I KEY ...

Страница 37: ...DCSense BATSense DC DC AM5898N Reg 5VA 3 3V 1 8V S W S W A 5V Standby LCD Panel Video Audio System Servo A 5V Battery out t 3 3V 1 8V LCD Vcc 7 5V 15V 10V DV 7 5V 15V 10V 5VD A 5V M5V Charge Discharge RCR2561 GT6 312 REMOCON RECEIVER 5VA Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 38: ... U201 MTK1389DE LP P DVDPLAYER ONE CHIP FMSO DMSO FOSO TRSO STBY V1P4 FO FO TR TR 27MHz X TAL CDLD LD01 DVDLD LD02 IOA LIMIT ALPC MDI1 MDI2 Spindle Moter SL SL Stepping Moter OP OP OPO SP SP Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 39: ...CEIVER KEY1 LCD MODE DISPLAY SETUP MENU UP DOWN LEFT RIGHT ENTER Power Charge LED KEY2 AD_KEY 3 3V 3 3V 2 14 2 8 16 64Mbit 1 8V 3 3V MT1389DE LP MPEG POWER PLAY PAUSE REW FF STOP COLOR BRIGHT DVD_K1 DVD_K2 DVD_K3 DVD_K4 DVD_K5 IR RED GREEN System AV Part SF_DO SF_DO Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 40: ...DIO PT2303 SPK SPK A 5V SP_L L H P JACK SP_L R A_MUTE_SW NJM4580M OP AMP 12V AV OUT SP_MUTE ML_OUT MR_OUT SDA SCL VOLUME System AV Part VIDEO ADC GT GT6312 6312 H P JACK SP_L R 5VA Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 41: ...DIF GPIO12 93 HSTR 11 92 LR GPIO10 91 DVDD18 90 UD GPIO9 89 VSTD GPIO8 88 GPIO7 CKE 87 RA3 86 RA2 85 DVDD33 84 RA1 83 RA0 82 RA10 81 BA1 80 DVSS18 79 BA0 78 RAS 77 CAS 76 RWE 75 RA4 74 RA5 73 RA6 72 RA7 71 RA8 70 RA9 69 DVDD33 68 RA11 67 RCLK 66 DQM1 65 HCK GPIO18 99 HSTL GPIO17 98 HOE GPIO16 97 RFH OPINN 128 RFG OPINP 127 RFIN OPOUT 126 RFIP 125 AGND18 124 AVDD18_1 123 ADACVDD2 122 ADACVDD1 121 A...

Страница 42: ... R302 10K RN301 33x4 RN301 33x4 1 8 2 7 3 6 4 5 C309 0 1uF C309 0 1uF R314 0 R314 0 L301 FB 50 L301 FB 50 1 2 C304 0 1uF C304 0 1uF C308 0 1uF C308 0 1uF C306 0 1uF C306 0 1uF C307 0 1uF C307 0 1uF R303 150 R303 150 R307 10K R307 10K CE301 47uF 10V CE301 47uF 10V 1 2 R301 10K R301 10K R313 0 R313 0 U301 HY57V641620 U301 HY57V641620 A0 23 A1 24 A2 25 A3 26 A4 29 A5 30 A6 31 A7 32 A8 33 A9 34 A10 AP...

Страница 43: ...21 PVCC2 7 VOSL 14 MGND 13 PGND1 26 PGND 25 GND 36 COMP1 30 MUTE 33 PVCC1 6 SW2 4 IPK2 5 BIAS 34 VOFC 9 VINFC 11 VINTK 23 VCC2 24 VINSP 22 SW1 29 IPK1 28 CT1 31 EN1 32 VOFC 8 PGND2 27 VOSL 15 MGND 16 VOTK 17 VOSP 20 MGND 19 VOTK 18 C402 2200pF NC C402 2200pF NC B C E Q407 3906 B C E Q407 3906 2 3 1 C435 0 1uF C435 0 1uF C410 0 1uF C410 0 1uF L403 50 L403 50 1 2 R455 0 R455 0 J403 4x1 W HOUSING J40...

Страница 44: ...K R542 47K CE503 1uF 50V CE503 1uF 50V 1 2 R532 10K R532 10K R538 4 7K R538 4 7K R545 10K R545 10K VR501 VOLUME VR501 VOLUME 1 1 2 2 3 3 4 4 5 5 6 6 7 7 CE513 1UF 50V CE513 1UF 50V 1 2 R502 10K R502 10K R558 10K R558 10K C505 100pF C505 100pF CE507 100uF 25V CE507 100uF 25V 1 2 R543 10K R543 10K R512 4 7K R512 4 7K R535 10K R535 10K L505 1 8uH L505 1 8uH R547 5 1K R547 5 1K R526 1K R526 1K C504 10...

Страница 45: ... 1 G1 2 S2 3 G2 4 D2 5 D2 6 D1 7 D1 8 TP620 TP620 C612 0 1uF C612 0 1uF CE605 100uF 25V CE605 100uF 25V 1 2 R612 R R612 R R616 51 R616 51 C613 0 1uF C613 0 1uF C609 20pF C609 20pF R621 51K 1 R621 51K 1 R626 9 1K 1 R626 9 1K 1 D607 BAT54S D607 BAT54S 3 2 1 D603 LL4148 D603 LL4148 1 2 C626 104 NC C626 104 NC R617 0 15 1W R617 0 15 1W R619 0 15 1W R619 0 15 1W J601 CON3_2 0MM_DIP_B J601 CON3_2 0MM_DI...

Страница 46: ... C710 33P L714 FB 600 L714 FB 600 1 2 R706 10K R706 10K L711 FB 600 L711 FB 600 1 2 L709 FB 600 L709 FB 600 1 2 R709 33 R709 33 J701 CON12_0 8MM J701 CON12_0 8MM 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 L707 FB 600 L707 FB 600 1 2 R707 33 R707 33 C706 33P C706 33P R713 33 R713 33 L702 FB 600 L702 FB 600 1 2 J704 CON20_0 8MM J704 CON20_0 8MM 10 9 8 7 6 5 4 3 2 1 11 13 12 15...

Страница 47: ...5pF C801 ESD 15pF C803 ESD 15pF C803 ESD 15pF K805 MENU K805 MENU 1 2 K806 POWER K806 POWER 1 2 R808 15K 1 R808 15K 1 C804 ESD 15pF C804 ESD 15pF R809 39K 1 R809 39K 1 K807 LCD_MODE K807 LCD_MODE 1 2 J801 CON10_1 0MM J801 CON10_1 0MM 10 9 8 7 6 5 4 3 2 1 11 12 R802 1 2K 1 R802 1 2K 1 K808 RIGHT K808 RIGHT 1 2 K813 RI 01CS0BM K813 RI 01CS0BM K801 SETUP K801 SETUP 1 2 K809 LEFT K809 LEFT 1 2 R803 1 ...

Страница 48: ...0 1 1 04 54 0 0 U302 AT26DF16 A 1 3 30 0 16 2 0 01 1 47 3 3 33 3 33 4 0 0 5 0 01 0 95 6 0 01 1 20 7 3 33 3 33 8 3 33 3 33 U401 AM5898N 1 0 2 40 2 1 29 1 28 3 1 26 1 27 4 0 01 0 5 11 92 11 89 6 11 94 11 91 7 11 94 11 91 8 0 2 21 9 2 43 2 57 10 5 07 4 95 11 1 40 1 38 12 1 40 1 57 13 0 0 14 2 42 3 27 15 2 42 1 55 16 0 0 17 2 44 2 35 18 2 44 2 42 19 0 0 20 2 44 2 31 21 2 44 2 55 22 1 40 1 38 23 1 40 1...

Страница 49: ...3 33 3 33 0 0 MODE PIN NO STOP PLAY CE206 1 41 1 40 0 0 CE207 3 33 3 32 0 0 CE208 1 87 1 87 0 0 CE209 3 33 3 33 0 0 CE211 3 33 3 32 0 0 CE212 3 26 3 26 0 0 CE213 3 33 3 33 0 0 CE301 3 33 3 33 0 0 CE402 5 07 4 98 0 0 CE403 5 07 5 00 0 0 CE406 5 06 5 00 0 0 CE410 3 39 3 38 0 0 CE411 11 80 11 71 0 0 CE412 5 06 5 04 0 0 CE413 11 80 11 71 0 0 CE415 3 37 3 36 0 0 CE416 5 15 4 99 0 0 CE417 3 34 3 33 3 34...

Страница 50: ...3 57 3 58 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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