LG 32LG710H Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LA95A

MODEL : 3

LG710H

LG710H-UA

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Printed in Korea

P/NO : MFL62439602 (0912-REV00)

Summary of Contents for 32LG710H

Page 1: ...EAD THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LA95A MODEL 32LG710H 32LG710H UA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO MFL62439602 0912 REV00 ...

Page 2: ...nal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 EXPLODED VIEW 14 SVC SHEET ...

Page 3: ...perate 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 p...

Page 4: ...n 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 b...

Page 5: ...e 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...

Page 6: ...nt 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL CSA IEC specification EMC FCC ICES IEC specification Model Market Appliance 37LG700H UA North America Safety UL1492 CSA C22 2 No 1 EMC FCC Class B IEC Class B 6 SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General Specification TV No Item Specif...

Page 7: ...r Temperature Cool x 0 274 x 0 276 x 0 278 oK The W B Tolerance is y 0 281 y 0 283 y 0 285 0 015 for Adjustment Medium x 0 283 x 0 285 x 0 287 y 0 291 y 0 293 y 0 295 Warm x 0 311 x 0 313 x 0 315 y 0 327 y 0 329 y 0 331 7 Color Distortion DG 10 0 8 Color Distortion DP 10 0 deg 9 Color S N AM FM 43 0 dB 10 Color Killr Sensitivity 80 dBm 6 Component Video Input Y CB PB CR PR No Resolution H freq kHz...

Page 8: ...2 DOS O 3 640 480 31 469 59 94 25 17 VESA VGA O 4 800 600 35 156 56 25 36 00 VESA SVGA O 5 800 600 37 879 60 31 40 00 VESA SVGA O 6 800 600 48 077 72 18 50 00 VESA SVGA O 7 800 600 46 875 75 00 49 50 ESA SVGA O 8 1024 768 48 363 60 00 65 00 VESA XGA O 9 1024 768 56 476 70 06 75 00 VESA XGA O 10 1024 768 60 023 75 02 78 75 VESA XGA O 11 1280 768 47 776 59 870 79 5 CVT WXGA O 12 1360 768 47 712 60 0...

Page 9: ...ded Both Board level and Final assembly adjustment items can be check using In Star Menu 1 ADJUST CHECK 3 2 Final assembly adjustment EDID DDC download White Balance adjustment RS 232C functionality check Factory Option setting per destination Ship out mode setting In Stop 3 3 Etc Ship out mode Service Option Default USB Download S W Update Option Service only ISP Download Option 4 Automatic Adjus...

Page 10: ...C calibration is failure ADC RGB Fail is displayed 6 If ADC calibration is failure after recheck ADC pattern or condition retry calibration Error message refer to v ADC 1024 768 RGB 1 Check connected condition of Component RGB cable to the equipment 2 Give a 1024 768 Mode 100 Horizontal Color Bar Pattern to RGB port MSPG 925 Series Ë model 60 pattern 65 3 Change input mode as RGB and picture mode ...

Page 11: ...out 5 Min 3 Surrounding Humidity 20 80 2 Equipment 1 Color Analyzer CA 210 NCG CH 9 WCG CH12 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remocon 4 Video Signal Generator MSPG 925F 720p 216 Gray Model 217 Pattern 78 Only when internal pattern is not available Color Analyzer Matrix should be calibrated using CS 1000 3 Equipment connection MAP 4 Adj Command Protocol 1 RS 232C C...

Page 12: ...should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location LCD Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time After Aging Start Keep the Power ON status during 5 Minutes In case of LCD Back light on should be checked using no signal or Full white pattern 6 Reference White Balance Adj coordinate and color temp...

Page 13: ... GND 1 5KV min at 100mA SIGNAL 3KV min at 100mA TEST time 1 second TEST POINT GND TEST POWER CORD GND SIGNAL CABLE METAL GND Internal Pressure TEST POWER CORD GND LIVE NEUTRAL LEAKAGE CURRENT At 0 5mArms 7 USB S W Download option 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your do...

Page 14: ... 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 manuf...

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Page 33: ...v HDMI RX1 HPD_0 PWR_0 GPIO TUNER CVBS LVDS WXGA LVDS FHD LVDS_0 LVDS_1 FLASH 128MByte EBI PCI SYS_RESET SYS_RESET SYS_RESET CLK BUF PCI_CLK_OUT PCI_CLK_IN PROiDIOM HSX PKT Serial TP Digital Input HD_DVI 24b PTC UART 0 2 UART1 UART0 RS 232 I2C_M1 5V I2C_M1 AUDIO ADC MCLK I2S AMP I2S SPDIF MNT OUT AMP VSB LGDT3305 TUNER TDVW H104P IF_N P BCM3549 Ethernet Copyright ⓒ 2009 LG Electronics Inc All righ...

Page 34: ...0_I2S_SCLK_OUT CS5340_I2S_LRCLK_OUT BCM_L_OUT1 BCM_R_OUT1 BCM_L_OUT BCM_R_OUT BCM_L_OUT2 BCM_R_OUT2 MNT_L_OUT MNT_R_OUT SPEAK_OUT_L SPEAK_OUT_L BUF MUTE2 Audio_MNT_MUTE MUTE2 Audio_MNT_MUTE MUTE1 Audio_AMP_MUTE BCM3553_I2S_DATA_OUT BCM3553_I2S_SCLK_OUT BCM3553_I2S_LRCLK_OUT BCM3553_AUD_MCLK BCM3553_AUD_MCLK BCM3553_SPDIF_OUT Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training ...

Page 41: ... F24 GPIO_IIC_SCL GPIO_IIC_SDA PTC IC501 EEPROM NVRAM IC502 R 5V R 3 3V R R D3 3V R R R D3 3V R R 5V R R R ST_5V 4 7K 4 7K 4 7K 4 7K 4 7K 22Ω 100Ω 22Ω 22Ω 0Ω 0Ω 4 7K R Bright Sensor M24512 IC900 NVRAM Level shifter R 5V 4 7K NTP3100 IC301 Audio AMP LGDT1129 IC800 Pro idiom Techwell IC1501 Video Dec R 22Ω R 100Ω R 22Ω EEPROM EDID IC1700 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only fo...

Page 42: ...RX BCM_TX PTC_RX_MNT PTC_TX_MNT FOR BCM Debuging and PTC Download Debugging and Monitoring Download debugging Communication PTC_RX_BCM_3 3V buffer buffer UART_SWA Communication Debugging TXD2 3 RXD2 2 MODC TAGHI BKGD D C 1 0 1 0 0 1 0 1 Level shifter opt PC_SIMUL PTC_TX_1 PTC_RX_BCM_5V UART_SWA UART_SWB UART_SWB Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service p...

Page 43: ...ATE pin Check switch SW500 SW501 Y N Check X500 Clock 7 37MHz Check X500 application circuit or Replace X500 Y N Check IC502 IIC communication state Check IIC line or replace IC501 N Check IR input state of IC501 23pin Check IR board N Y Re download PTC Micom Y Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...eck P400 All Voltage Level 5V 12V 16V Check power connector and RL_ON signal OK Replace Power board N Y Check Q401 output Voltage 12V Y Check Q401 application circuit or replace Q401 N Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...al waveform NO You should check power line IIC lines YES You should replace TUNER NO After checking video signal line the Power of LPF you should decide to replace item or not NO After checking the Power IIC of IC1501 you should decide to replace it or not YES This board has big problem because Main chip BCM3549 have some troubles After checking thoroughly all path once again You should decide to ...

Page 46: ...ync R140 Y Y N Check Tuner 5V Power IC401 Replace IC401 Y N Y Maybe LGDT3305 IC1001 has problems N Check X100 and application circuit Check IF Signal TU1001 10 11 Pin Check tuner application circuit or replace tuner N Y Replace X1200 N Y Replace IC101 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...ecause it s more easy to check Can you see the normal waveform YES This board has big problem because Main chip BCM3549 have some troubles After checking thoroughly all path once again You should decide to replace BCM3549 or not AV Video Trouble shooting guide YES Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ...e it s more easy to check Can you see the normal waveform This board has big problem because Main chip BCM3549 have some troubles After checking thoroughly all path once again You should decide to replace BCM3549 or not Component Video Trouble shooting guide YES YES NO Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ...e some troubles After checking thoroughly all path once again You should decide to replace BCM3549 or not YES NO Check the input Pin AB12 AC11 AF11 of BCM3563 IC101 Measure waveform at C1111 C1112 C1113 because it s more easy to check Can you see the normal waveform Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...eform JK201 JK202 may have problem Replace this Jack Check HDCP communication lines IC100 After checking the Power of this chip you should decide to replace this or not YES NO NO Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...asy to check Can you see the normal waveform YES NO Could you measure voltage of TU100 IIC lines Are they all normal NO You should check power line IIC lines YES You should replace TUNER NO After checking audio signal line you should decide to replace item or not Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...k the input Pin AC8 AB9 AF6 AE7 AF7 AE9 AB10 AD10 of BCM3549 IC100 Measure waveform at C1004 C1005 C1006 C1007 C1008 C1009 C1010 C1011 because it s more easy to check Can you see the normal waveform NO After checking audio signal line you should decide to replace item or not Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...veform JK201 JK202 may have problem Replace this Jack Check HDCP communication lines IC100 After checking the Power of this chip you should decide to replace this or not YES NO NO Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...hould decide to replace BCM3549 or not After checking audio signal line you should decide to replace item or not YES Check the output Pin 30 31 36 37 47 48 53 54 of NTP3100 IC301 Can you see the normal waveform NO YES After checking the Power I2C Reset of this chip you should decide to replace this or not Check the speaker output wafer P300 Can you see the normal waveform NO YES After checking aud...

Page 55: ...S NO NO This board has big problem because Main chip BCM3549 have some troubles After checking thoroughly all path once again You should decide to replace BCM3549 or not After checking audio signal line you should decide to replace item or not YES After checking the Jack you should decide to replace item or not Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service pu...

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