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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LA85C

MODEL : 19LG30

19LG30-UA

MODEL :

19LG31

19LG31-UB

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Содержание 19LG30 Series

Страница 1: ...THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LA85C MODEL 19LG30 19LG30 UA MODEL 19LG31 19LG31 UB North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Страница 2: ...Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 8 TROUBLE SHOOTING 11 BLOCK DIAGRAM 15 EXPLODED VIEW 22 SVC SHEET ...

Страница 3: ... 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...

Страница 4: ... on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 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...

Страница 5: ...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 replac...

Страница 6: ...d 2 Demanded other specification Safety UL CSA IEC specification EMC FCC ICES IEC specification SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General Specification TV No Item Specification Option Remark 1 Receivable System ATSC 64 256 QAM NTSC M USA only 2 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 3 Input Voltage ...

Страница 7: ...68 47 720 59 799 84 75 CVT WXGA O 6 1440 900 55 5 59 90 88 750 19 22LG30 UA only WXGA 7 1400 1050 64 744 59 948 101 00 22LG30 UA only WSXGA 8 1680 1050 65 290 59 954 146 25 22LG30 UA only WSXGA DTV 1 720 480 31 469 59 94 27 00 SDTV 480P 2 720 480 31 500 60 00 27 03 SDTV 480P 3 1280 720 44 96 59 94 74 17 HDTV 720P 4 1280 720 45 00 60 00 74 25 HDTV 720P 5 1920 1080 33 72 59 94 74 17 HDTV 1080I 6 192...

Страница 8: ...X bin by clicking Read 5 Click Auto tab and set as below 6 click Run 7 After downloading check OK message 3 2 ADC Process 3 2 1 PC input ADC 1 Auto RGB Gain Offset Adjustment 1 Convert to PC in Input source I2 C COMMAND 0xF4 SELECT INPUT 0x00 0x60 RGB cf 0x10 TV 0x20 AV 0x40 COMPONENT 0x60 RGB 0x90 HDMI 2 Signal equipment displays Output Voltage 700 mVp p Impress Resolution XGA 1024x 768 60Hz Mode...

Страница 9: ...al items cf work instructions 1 TV 2 AV CVBS S Video 3 COMPONENT 480i 4 RGB PC 1024 x 768 60hz 5 HDMI 6 PC Audio In and H P Out Display and Sound check is executed by Remote control 4 Total Assembly line process 4 1 Adjustment Preparation 1 Heat run above 30 minutes in RF no signal 2 15 Pin D sub jack is connected to the auto W B equipment 4 2 Adjust color coordinate of Cool 1 Set Input to RGB 2 S...

Страница 10: ...ress 0x7F can be also changed 1 All Data HEXA Value 2 Changeable Data Serial No Controlled Data 01 Month Controlled Data 00 Year Controlled Check sum 4 6 HDCP setting High Bandwidth Digital Contents Protection 1 Connect D sub Signal Cable to D Sub Jack 2 Input HDCP key with HDCP key in program 3 HDCP Key value is stored on EEPROM AT24C512 which is 80 A1 addresses of 0xA0 0xA2 page 4 AC off on and ...

Страница 11: ... Only for training and service purposes LGE Internal Use Only Check 15V or 5V of P701 Check short of Main board or change LIPS Fail Pass Pass Change IC705 Pass Check output of Q701 Fail Change Q701 Start check Change LED Assy Check Output of IC705 Pass Check LED Assy Pass Check P304 Connector Fail Fail ...

Страница 12: ...r 1 PROCESS Check IC700 IC702 IC703 IC704 IC705 IC706 IC708 IC709 IC710 Pass Fail Change IC700 IC702 IC703 IC704 IC705 IC706 IC708 IC709 IC710 Check input output of IC00 Fail Change IC100 Pass Change LVDS cable or module Check the inverter connector or inverter Pass Check LVDS cable or module Pass Check input source cable jack Fail Fail Change inverter connector or inverter Start check ...

Страница 13: ...ck 3 1 Start Check 3 2 Check input source cable and jack Repeat No power 1 process Fail Check output of TU400 Pass Pass Fail Check 5V of TU400 Re Soldering or change the defect part Check the signal of R622 R623 R681 R615 R616 R617 R640 R641 R642 Fail Change signal of R622 R623 R681 R615 R616 R617 R640 R641 R642 Pass Check input output of IC100 Pass Fail Re soldering or change defect part Check X1...

Страница 14: ...al Use Only Check the input Source Fail Pass Change source input Check input Output of IC100 Fail Pass Re soldering or change the defect part Check the X100 Check the input output of IC500 Fail Re soldering or change the defect part Pass Check the Speaker Pass Check the Speaker wire Start Check Fail Change the speaker ...

Страница 15: ..._N_L 29 IN_L 38 IN_R 5 HP_DET 37 MUTE 6 12V AUOUTR0 73 AUOUTL0 72 GPIO12 79 1CH LVDS 137 146 2CH LVDS 137 146 150 159 RXE RXO BIN 21 SOGIN 22 GIN 23 RIN 24 VS_RGB 17 HS_RGB 16 RGB_SW 80 SCL RX 117 SDA TX 116 AUR_IN 59 AUL_IN 58 PB_IN 26 SOY 29 Y_IN 28 PR_IN 31 AUL_IN1 56 AUR_IN1 57 COMP_SW 112 CVBS1 42 AUL_IN0 54 AUR_IN 55 AV1_SW 111 SV_C0 38 SV_Y0 39 S_SW 82 6630G70016A 6630G00001A 6612F00001D 66...

Страница 16: ...CTL DIM INV_BR GND ST5V GND IC702 MP2305DS 12V IC700 KIA7809F 19 22 W IC103 IC105 Flash Memory IC200 IC201 SDRAM 2 HY57V641620ETP IR receiver Pannel 19 22 Q704 FET SI49258 TU400 TUNER TDVF H051F 9V IC701 KIA7805F 5V IC706 AZ1117H 3 3 IC709 AZ1085S ADJ IC703 AZ1085S 3 3 IC710 AZ1085S ADJ ST2 6V ST3 3V ST1 25V ST3 3V VDD_DDR VDDP AVDD_OTG IC501 HP Amp TPA6110A IC705 AZ1085S ADJ ST3 3V IC102 AT24C512...

Страница 17: ...ROM EDID ISP TDVF H051F IF_P IF_N SIF TUNER_CVBS IF_AGC Buffer LPF LGDT3304 8VSB QAM TS 0 7 TS_CLK TS_SYNC TS_VALID I2C MSCL MSDA MAIN I2C CVBS_0 SIF TS_DATA B 3 IF1 11 IF1 10 IF_AGC 12 SIF 15 CVBS 16 SDA 7 SCL 8 AS 9 TU_SDA 13 TU_SCL 11 IF_AGC 15 MSDA 36 MSCL 38 IF_N 4 IF_P 3 TS 20 22 24 26 27 28 29 31 TS_CLK 33 TS_SYNC 34 TS_VALID 19 64Kbyte 3 TUNER VSB ...

Страница 18: ...TU_V Y Cb Cr_IN Y C IN CVBS1 CVBS0 CVBS1 LGE1854C From Tuner SVIDEO Y C Component Y Cb Cr RGB RGB_IN Component RGB LGDT3304 TS Data DTV_IN YAMAHA CLASS D AMP YDA148 LGE1854C SPEAKER Output SIF TS_DATA AU_OUT0_ L R AV1_L R COMPONENT_L R DSUB RGB_L R Audio path Head Phone AMP TPA6110A Head Phone Output HDMI HDMI_DATA HDMI HDMI_DATA 4 VIDEO AUDIO ...

Страница 19: ...2 24C512 SCK 129 SDI 130 SDO 131 SCZ 132 JK605 D SUB IC600 24C02 EDID IC200 SDRAM IC201 SDRAM CKE MCLK AR 0 12 MDATA 0 15 DQM0 1 CKE MCLK AR 0 12 MDATA 16 31 DQM0 1 JK606 RS232C IC601 MAX3232CDR RS232C_TXD RS232C_RXD IC103 IC105 Flash Memory IC800 24C02 EDID J800 HDMI SCL_HDMI SDA_HDMI DDCDA_SDA DDCDA_SCL DDCR_DA 126 DDCR_CK 127 SCL_EEPROM 136 SDA_EEPROM 135 UART_TX1 196 UART_RX1 195 DDCDA_DA 14 D...

Страница 20: ...nternal Use Only IC100 LGE1854C LGDT3304 TUNER MSCL MSDA I2C_5V 5VST EEPROM EDID IC102 IC600 IC800 EEPROM EDID IC102 IC600 IC800 I2C Address 0xC2 0x1C IC100 LGE1854C S25PFL064A or MX25L64050MI Serial Flash SCK SDI SDO CSZ SPI_CK SPI_DI SPI_DO SPI_CSZ SCLK SI SO CS ST3 3V 5V DDC_ROM SCL SDA 0xA0 6 I2 C ...

Страница 22: ...al and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer I...

Страница 25: ...Jan 2008 Printed in Korea P NO MFL41524405 ...

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