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LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LD88D

MODEL : 32LG7000

32LG7000-ZA

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Содержание 32LG7000

Страница 1: ...SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD88D MODEL 32LG7000 32LG7000 ZA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Страница 2: ...ics Inc All right reserved Only for training and service purposes LGE Internal Use Only CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 23 EXPLODED VIEW 33 SVC SHEET ...

Страница 3: ...o 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 terminal...

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 repla...

Страница 6: ... Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 20 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC Specification EMC CE IEC No Item Specification Remark 1 Display Screen Device 31 5 inch Color T...

Страница 7: ... II 4 SECAM L L 5 DVB T 3 Receiving system Analog Upper Heterodyne Digital COFDM 4 Scart Jack 2EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT Analog Scart 2 jack is Half scart and support MNT OUT 5 Video Input 1EA PAL SECAM NTSC Side AV 6 S Video Input 1EA PAL SECAM NTSC Side AV 7 Component Input 1EA Y Cb Cr Y Pb Pr 8 RGB Input RGB PC Analog D Sub 15Pin 9 HDMI Input 4EA HDMI PC HDMI1 D...

Страница 8: ...TV 720P 9 1280 720 37 50 50 00 74 25 HDTV 720P 50Hz 10 1920 1080 33 72 59 94 74 176 HDTV 1080I 11 1920 1080 33 75 60 00 74 250 HDTV 1080I 12 1920 1080 28 125 50 00 74 250 HDTV 1080I 50Hz 13 1920 1080 56 25 50 HDTV 1080P 14 1920 1080 67 5 60 HDTV 1080P 5 Component Video Input Y PB PR No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 720 400 31 468 70 08 28 32 2 640 480 31 469 59 ...

Страница 9: ...n H freq kHz V freq Hz Pixel clock MHz Proposed 1 640 480 31 649 59 94 25 175 SDTV 480p 60Hz 2 640 480 31 469 60 25 20 SDTV 480p 60Hz 3 720 480 31 47 59 94 27 00 SDTV 480p 60Hz 4 720 480 31 50 60 27 027 SDTV 480p 60Hz 5 720 576 31 25 50 00 27 00 SDTV 576p 50Hz 6 1280 720 37 50 50 00 74 176 HDTV 720p 50Hz 7 1280 720 44 96 59 94 74 176 HDTV 720p 60Hz 8 1280 720 45 00 60 74 250 HDTV 720p 60Hz 9 1920 ...

Страница 10: ...PCB assembly adjustment method Caution Using power on button of the Adjustment R C power on TV ADC Calibration Protocol RS232 EDID data and Model option download RS232 Note 1 Note 2 Baud rate 115200 bps RS232 Host PC echo none 3 1 ADC adjustment Adjustment can be done using only internal ADC so input signal is not necessary Required equipment Adjustment R C 1 Press ADJ key on adjustment R C 2 Sele...

Страница 11: ...2D 01 1D 00 80 51 D0 1C 20 40 80 35 00 BC 0xB0 88 21 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 0xC0 00 13 8E 21 00 00 18 02 3A 80 18 71 38 2D 40 58 0xD0 2C 45 00 06 44 21 00 00 1E 01 1D 80 18 71 1C 16 0xE0 20 58 2C 25 00 C4 8E 21 00 00 9E 4E 1F 00 80 51 0xF0 00 1E 30 40 80 37 00 BC 88 21 00 00 18 00 00 ⓔ MODEL NAME PRODUCT ID HEX EDID Table 32LG7000 30302 765E 5E76 37LG7000 30264 7638 3876 42LG700...

Страница 12: ...just CA 100 CA 210 by CS 1000 before measuring You should use Channel 9 which is Matrix compensated White Red Green Blue revised by CS 1000 and adjust in accordance with White balance adjustment coordinate Color temperature standards according to CSM and Module Change target luminance and range of the Auto adjustment W B equipment White balance adjustment coordinate and color temperature PC for co...

Страница 13: ... and display inside pattern 5 Control is carried out on three color temperatures COOL MEDIUM WARM Control is carried out three times Temperature COOL R Cut G Cut B Cut is set to 64 Gain of Fixed color should be kept on 192 and adjust other two lower than 192 Each gain is limited to 192 Temperature MEDIUM R Cut G Cut B Cut is set to 64 Gain of Fixed color should be kept on 192 and adjust other two ...

Страница 14: ..._by 5V signal circuit Yes 4 Check the AC detect signal circuit Yes No 5 Check the VSC RL_ON PWR_ON OFF signal No No No Does not low voltage output comes out Yes Does not the St by 5V P 5V signal comes out Does not the AC Detect signal comes out No Does not the RL_ON PWR_ON OFF comes out No Yes 7 Check the VSC INV_CTL signal Yes 8 Check the INV 24V voltage output circuit Manufacture enterprise mean...

Страница 15: ...t Plug the power cord in Is AC INLET Cable Red Blue connected with th PSU Connect the AC INLET Cable Yes No No Are the fuses OK on the PSU check open or short status with Multi meter Replace the fuse Yes No Is the PSU connected with Main Board though a 24pin cable Connect a 24p cable to PSU to Main P1000 pin Yes Measure output voltages 16V 12V 5V on the PSU Main P1000 pin1 2 16V pin 5 6 12V pin 9 ...

Страница 16: ... On status Lamp off Check inverter lamp On Of status Check LVDS Cable Replace the LVDS Cable NG NG NG Check Q501 L502 500 PANEL_Vcc_EN signal NG Recheck PSU 5V 12V 16V If not OK then replace PSU Replace PSU Check the PWM signal P1000 pin 22 21 Replace the Main B D NG Re App S W download If not OK then replace IC100 Check IC502 power block L1200 1 0V L1213 1 8V IC1204 3 3V IC1205 3 3V IC1206 1 2V N...

Страница 17: ...eck ATV sound signal 1 Sound signal SIF R317 SECAM L sound R326 NG DTV Check sound processor 1 IC603 pin50 for SIF RF sound 2 IC603 pin47 for SECAM L sound Check App S W If App S W OK then replace IC603 Check Digital AMP 1 VDD 16V IC600 pin49 52 32 35 VDD 1 8V IC600 pin2 13 16 2 Mute check IC600 pin25 No problem NG No problem No problem No problem Check App S W If App S W OK then replace IC600 NG ...

Страница 18: ...9 52 32 35 VDD 1 8V IC600 pin12 13 16 2 Mute check IC600 pin25 No problem Video NG Replace IC100 No problem No problem 2 3 In case of abnormal display or sound when side AV1 SCART1 mode Check video signal 1 CVBS JK101 pin20 and C519 Check AV2 Jack 1 SCART1 LINK check R149 or JK101 pin17 Check Video Audio Check Audio signal 1 R JK101 pin2 and C690 2 L JK101 pin6 and C627 Audio NG Check App S W If A...

Страница 19: ... S W If App S W OK then replace IC100 NG Check 74HC14D IC103 1 H sync pin4 2 V sync pin8 3 If problem with IC103 then replace IC103 No problem or No sound Check EDID 1 Read EDID data EDID download and recheck No problem No problem 2 5 In case of abnormal display or sound when VGA Input mode Check video signal 1 Y JK102 pin3A and C509 2 Pb JK102 pin5B and C512 3 Pr JK102 pin5C and C515 Check Compon...

Страница 20: ...check IC201 4 pin6 5 Check HDMI HPD Output 1 HDMI JK201 202 203 Pin19 Check TMDS signal 1 JK201 3 JK204 pin1 12 Check App S W If App S W OK then replace IC100 No problem Check App S W If App S W OK then replace IC201 4 NG Check HDMI 5V_DET input 1 HDMI JK201 202 203 Pin20 Check HDMI source If OK then replace HDMI JACK No problem Check App S W If App S W OK then replace IC100 No problem No problem ...

Страница 21: ... Check 16V input Voltage IC600 pin49 52 2 Check 1 8V input Voltage IC600 pin12 13 16 3 Check the IIC communication SDA SCL R619 R620 4 Check the Audio Signal is Normal SPK_L R L603 L604 Yes Replace Main B D Yes Yes Set on speaker in menu TV Speaker OFF ON No Change or Reconnect the Speaker Cable No Replace Audio AMP IC IC600 No Yes Only RF is no sound Check the Tuner IN OUT SIF R317 SECAM L R326 Y...

Страница 22: ...al Use Only Check the blue tooth device power Recharge device and power on The blue tooth device is headset Check connection blue tooth cable on TV set Yes No No No problem No problem No problem Is it Pairing Mode Blue tooth headset device Check P903 main board 5pin 5V Replace IC904 of Main B D Or Replace Main B D Yes Yes Setting headset to Pairing Mode and retry Check P903 main board 2 3pin signa...

Страница 23: ...IC901 HDMI4 Sid e RGB PC L R Tun er TDFV G135D1 TU3 00 TMDS 0 7 1 2 0 Hz m o d ule 74LVC 541A PW Buffer IC400 CI Slot P400 74LVC 245A Bi Buffer IC 402 DATA 0 7 74LCX244MTC Buffer IC403 405 406 Ad d ress 0 14 CTRL s ig nals TMDS 0 7 CVBS Tuner V out NLASB3157 IC 500 LVDS TMDS EVN 10 b it LVDS TMDS ODD 10 b it Ho st Ad d res s 1 16 Ho st Dat a 0 15 LPF DDR2 Dat a 0 15 DDR2 SDRAM 64MByt e HYNIX IC701...

Страница 24: ...VDS o ut p ut 10b it First sec o nd c hannel LVDS o ut p ut 10 b it Third f o urt h c hannel MT8280_INT0 MT8280_PWN MT8280_PRST UART I2S SDA SCL2 Mast er DDR2 400Mhz 2 IC1100 IC1101 RS 232 Jac k Fo r d eb ug g ing P1202 Serial Flash IC1201 Serial f lash WP Data In out Clk in Data BUS Control Bus Address bus TX RX 27Mhz UART0 slave UART1 4p in waf er Fo r d o wnlo ad P1203 2 FRC ...

Страница 25: ...ly for training and service purposes LGE Internal Use Only FLI10620H Bluetooth Module IC904 UPD720114 USB Hub USBUP_DP USBUP_DM BLUE_DP BLUE_DM USB20_1_DP USB20_1_DM Bluetooth Module MIPS IC101 LBMS 2C66B4 BLUE_DP BLUE_DM M101 Audio PCM Picture JPEG 3 Bluetooth ...

Страница 26: ... 2 audio R in 1 Audio R out TV SCART 1 23 GND 22 GND 21 safety GND 20 CVBS in 19 CVBS out DTV out 18 17 video GND 16 15 C in 14 data GND 13 GND 12 data1 11 CVBS in 10 data 2 9 GND 8 function select 7 CVBS in 6 audio L in 5 GND 4 audio GND 3 audio L out DTV 2 audio R in 1 Audio R out DTV SCART 2 LBADC_IN4 A2P B2P C2P A4P C4P SCART_FB AUD_IN_L1 R1 TR Adj 15 VIDEO AUD_OUT2_L R TR BUF TR Net GPIOA4 MU...

Страница 27: ...C EDID AT24C02BN HDMI 3 TMDS 8b it DDC HDMI3 I2C EDID AT24C02BN HDMI SW TMDS HDMI I2C SW GPIOA0 GPIOA1 HDMI Selec t 1 HDMI Selec t 2 CEC_REMOTE GPIOB1 2WIRE_S2 2WIRE_S0 DSDA1 DSCL1 HDMI BUF TMDS DDC HDMI4 I2C EDID AT24C02BN 2WIRE_S1 ARX BRX VXO_D20 VXO_D21 HDMI2 5V DET HDMI3 5V DET HDMI4 5V DET VXO_CLK HP DET S W4 VXI_D23 HP DET S W3 HP DET S W2 HDMI_A_HPD HDMI_B_HPD VXO_D22 FET Bi BUF NLASB3157 I...

Страница 28: ...N CI DATA 0 7 POD_DIR_N CI DATA Dir Selec t CI Det ec t POD_DETECT_N CI Det ec t TS_IN 0 7 74LCX244MTC Buf f er IC403 HOST Ad d res s 0 3 POD Ad d res s 0 3 CI Ad d ress 0 7 74LCX244MTC Buf f er IC406 HOST Ad d res s 10 13 POD Ad d res s 8 9 14 HOST Ad d res s 4 74LCX244MTC Buf f er IC405 REG CI Det ec t CI Det ec t CI Ad d res s 8 14 CI Det ec t POD_OE_HOST_RD HOST Out Enab le CI Out En ab le HOS...

Страница 29: ...LPF Co m p L R SIDE L R PC L R AUD_IN_L R 3 Ch 3 AUD_IN_L R 4 Ch 4 AUD_IN_L R 5 Ch 5 AUDO_SPDIR_OUT Tuner TDFV G135D1 TU301 AM AUDIO TR BUF MUTE_LINE_DTV TR BUF TR BUF SCART 1 SCART 2 TV LR OUT DTV LR OUT 16V FAULT AUDIO_MUTE VXO_D5 RESET I2C 3 3V TPY 10W 10W TPS2042BDRG4 Po w er Dis t rib uter IC901 5V USB DP DM 5V 600mA FLI10620H MICOM MICOM MSP4458G AUD_OUT1 L R Level Ad j Sc art 1 L R Level Ad...

Страница 30: ...O_D5 PCMCIA CI_RST POD_RESET TUNER FE_RESET VXI_D14 FLI10620H MICOM MT8280 FRC_RESET DFSYNC_E13 9 I2C Control SDA2_3 3V SCL2_3 3V EYEQ 0xE8 RGB 0x94 MICOM 0x50 NTP3000A 0x54 MSP4458 0x80 Master I2C 1 TUNER Analog R 0x87 W 0x86 24LC512 W 0xA6 R 0xA7 SDA1_5V SCL1_5V Master I2C 0 Slave I2C 0 Slave I2C 1 Slave I2C 2 EDID AT24C02BN EDID AT24C02BN EDID AT24C02BN EDID AT24C02BN BU16027KV IC200 FLI10620H ...

Страница 31: ...C1006 AZ1117H 1 8TRE 1 8V IC1007 BA33BC 3 3V_STBY MICOM IC1001 BA33BC 1A 3 3V_EN 3 3V DOUGLAS IC1002 BA18DD0WHFP Rohm 1 8V_DOUGLAS_DDR 1 8V_DOUGLAS_EN IC1000 BD9130 2A 1 2V_DOUGLAS 1 2V_DOUGLAS_EN MICOM MICOM MICOM 3 3V_OTP IC100 Douglas IC700 IC701 DDR2 IC802 Micom IC801 EEPROM IC904 USB Hub TUNER IC600 NTP3000A IC104 MAX3232 IC200 TMDS351 CI Block For audio block 160mA 1250mA 480mA 300mA ...

Страница 32: ...N OFF MICOM P_ 5V SPDIF IC603 MSP4458G IC903 MIC2019 USB_power IC901 NVRAM IC501 Analog s w For DTV MNT out IC1202 BD9130 DC DC IC502 MT8280 IC600 NTP3000A IC603 MSP4458G TU300 TUNER Ci slot Module IC200 TMDS351 IC201 4 HDMI EEPROM P903 Bluetooth module 120mA 1600mA 1180mA 550mA MT8280_CORE_1 0V IC1204 AZ1117 3 3 MT8280_DVDD33 6 7mA IC1203 BD9130 DDR2 BD35331 VTT regulator IC1204 AZ1117 3 3 IC1206...

Страница 33: ...electrical 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 manufa...

Страница 34: ..._STBY PANEL_ERROR_DET 1 8V 0 1uF 16V C1046 KIA78R05F IC1005 1 VIN 2 VC 3 VOUT 4 NC 5 GND1 6 GND2 P_ 16V 1 26V_DOUGLAS_EN 0 1uF 50V C1028 3 3V_TUNER 0 1uF 16V C1034 KIA7805AF IC1008 2 C 3 O 1 I 220uF 16V C1001 0 1uF 16V C1049 120 ohm L1003 0 1uF 16V C1041 120 ohm L1000 120 ohm L1005 3 3V_CI 0 1uF 16V C1045 P_ 5V VBR_B 120 ohm L1004 100 R1014 1 2V_DOUGLAS_D P_ 12V 0 1uF 16V C1044 5V_TUNER 4 7K R1017...

Страница 35: ...T E12 OBUFC_CLK F21 NC_1 F7 NC_2 F8 NC_3 F9 NC_4 F10 NC_5 F11 SIF_IN K6 3 3V_STBY 3 3V_STBY 3 3V_STBY 3 3V_STBY 18pF 50V C811 18pF 50V C812 120 ohm L800 120 ohm L803 120 ohm L802 120 ohm L801 4 7uF 6 3V C800 0 1uF 16V C833 0 1uF 16V C834 BIT_SEL PWM_BUZZ PWM_BUZZ 2 2K R851 2 2K R850 680pF C804 0 R882 4 7K R805 4 7K R806 SIDE_S_SW 0 R847 10K R883 READY 10K R884 READY 10K R885 READY 10K R886 READY 3...

Страница 36: ...Jul 2008 Printed in Korea P NO MFL42349001 ...

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