LG 42LN5460 Page 58 Service Manual Download | Manualshive

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Standard Repair Process Detail Technical Manual

Inverter B+ 24V measuring method

A. Video error_No video/Normal audio

A2

Established

date

Revised

date

Error

symptom

Content

LCD TV

2012. 11 .17

Measure LED+ applying to LED Back Light from Power Board.

Output LED+ from Power Board -> supply to LED B/L.

Check Pin contacting statement and connection statement.

<LPB MODELS>

Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

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Summary of Contents for 42LN5460

Page 1: ...ODEL 42LN5460 42LN5460 SM CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...Copyright LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 10 BLOCK DIAGRAM 19 EXPLODED VIEW 20 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals 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 touch other ohm meter lead in turn to each exposed m...

Page 4: ...lectrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial 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...

Page 5: ...he 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 replace...

Page 6: ...h 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 4 General Specification No Item Specification Measurement Result Remark 1 Receiving System 1 SBTVD NTSC PAL M PAL N 2 Available Channel 1 VHF 02 13 2 UHF 14 69 3 CATV 01 135 3 Input Voltage 1...

Page 7: ...CMI 39LN5400 SB SA T390HVN02 2 FHD 60Hz AUO 39LN5400 SB SA LC420DUE SFR5 FHD 60Hz LGD 42LN5200 SA HC420DUN SLFA1 FHD 60Hz LGD 42LN5460 SM LC420DUE SFR1 FHD 60Hz LGD 42LN5400 SB SA T420HVN05 0 FHD 60Hz AUO 42LN5400 SB SA LC470DUE SFR1 FHD 60Hz LGD 47LN5400 SB SA FHD 60Hz LGD 47LN5460 SM LC500DUE SFR2 FHD 60Hz LGD 50LN5400 SB SA LC550DUJ SEE1 FHD 60Hz LGD 55LN5400 SB SA LC320DXE SFU2 HD 60Hz LGD 32L...

Page 8: ...4 27 0 SDTV 480P 6 720 576 31 250 50 000 27 000 SDTV 576P 7 1280 720 37 500 50 000 74 25 HDTV 720P 8 1280 720 45 00 60 00 74 25 HDTV 720P 9 1280 720 44 96 59 94 74 176 HDTV 720P 10 1920 1080 28 125 50 00 74 250 HDTV 1080I 11 1920 1080 33 75 60 00 74 25 HDTV 1080I 12 1920 1080 33 72 59 94 74 176 HDTV 1080I 13 1920 1080 56 250 50 00 148 50 HDTV 1080P 14 1920 1080 67 500 60 00 148 50 HDTV 1080P 15 19...

Page 9: ...80 FHD Only 67 5 60 148 5 HDTV 1080P O DTV 1 720 480 31 469 59 940 27 000 SDTV 480P 2 720 480 31 500 60 000 27 027 SDTV 480P 3 720 576 31 250 50 000 27 000 SDTV 576P 4 1280 720 37 500 50 000 74 25 HDTV 720P 5 1280 720 45 00 60 00 74 25 HDTV 720P 6 1280 720 44 96 59 94 74 176 HDTV 720P 7 1920 1080 28 125 50 000 74 25 HDTV 1080I 8 1920 1080 33 75 60 00 74 25 HDTV 1080I 9 1920 1080 33 72 59 94 74 176...

Page 10: ...C Boot file Download 1 Execute ISP program Mstar ISP Utility and then click Config tab 2 Set as below and then click Auto Detect and check OK message If Error is displayed Check connection between computer jig and set 3 Click Read tab and then load download file XXXX bin by clicking Read 4 Click Connect tab If Can t is displayed Check connection between computer jig and set 5 Click Auto tab and se...

Page 11: ...on 1 and Push OK button 3 Punch in the number Each model has their number 4 Completed selecting Tool option Model Module Tool option1 Tool option2 Tool option3 Tool option4 Tool option5 Tool option6 32LA613B SB LGD 84 2440 32669 46344 47108 97 42LA6130 SB LGD 87 2440 32669 46344 47108 97 47LA6130 SB LGD 88 2440 32669 46344 47108 97 32LN540B SH SA LGD 20 2440 16281 13576 43012 17 32LN5400 SB SA LGD...

Page 12: ...xx H R Time Min Cool Medium Warm x y x x y x 271 270 286 289 313 329 1 0 5 282 285 297 304 321 340 2 6 10 278 280 293 299 317 335 3 11 20 275 275 290 294 314 330 4 21 30 272 272 287 291 311 327 5 31 40 269 269 284 288 308 324 6 41 50 268 267 283 286 307 322 7 51 80 267 266 282 285 306 321 8 81 119 266 264 281 283 305 319 9 Over 120 265 263 280 282 304 318 Connecting picture of the measuring instru...

Page 13: ...able use RF input In EZ Adj menu 8 White Balance you can select one of 2 Test pattern ON OFF Default is inner ON By selecting OFF you can adjust using RF signal in 206 Gray pattern CASE Cool First adjust the coordinate far away from the target value x y 1 x y target i Decrease the R G 2 x y target i First decrease the B gain ii Decrease the one of the others 3 x target y target i First decrease B ...

Page 14: ...d Check sum Auto Download After enter Service Mode by pushing ADJ key Enter EDID D L mode Enter START by pushing OK key Edid data and Model option download RS232C NO Item CMD 1 CMD 2 Data 0 Enter download MODE Download Mode In A A 0 0 When transfer the Mode In Carry the com mand Edid data and Model option download Download A E 00 10 Automatically download The use of a internal Data Caution Use the...

Page 15: ...m Physical Address 0x9E HDMI 1 42 DE 10 HDMI 2 42 CE 20 3 FHD 2D EDID Data Not Support Deep Color 8bit CheckSum Physical Address 0x9E HDMI 1 42 25 10 HDMI 2 42 15 20 4 HD 3D EDID Data CheckSum Physical Address 0x9E HDMI 1 A3 59 10 HDMI 2 A3 49 20 HDMI 5 FHD 3D EDID Data Not Support Deep Color 8bit CheckSum Physical Address 0x9E HDMI 1 42 23 10 HDMI 2 42 13 20 HDMI ...

Page 16: ...t CheckSum Physical Address 0x9E HDMI 1 42 DC 10 HDMI 2 42 CC 20 7 HD 3D DTS EDID Data CheckSum Physical Address 0x9E HDMI 1 A3 C0 10 HDMI 2 A3 B0 20 8 FHD 3D DTS EDID Data Not Support Deep Color 8bit CheckSum Physical Address 0x9E HDMI 1 42 8A 10 HDMI 2 42 7A 20 HDMI 9 HD 2D DTS EDID Data CheckSum Physical Address 0x9E HDMI 1 A3 C2 10 HDMI 2 A3 B2 20 HDMI ...

Page 17: ...led Buzzer operates If Test is passed execute next process Hi pot test Remove A V CORD from A V JACK BOX 5 HI POT test Auto If Test is failed Buzzer operates If Test is passed GOOD Lamp on and move to next process automatically 4 6 3 Checkpoint 1 Test voltage 3 Poles GND 1 5KV min at 100mA SIGNAL 3KV min at 100mA 2 Poles SIGNAL 3KV min at 100mA 2 TEST time 1 second 3 TEST POINT 3 Poles GND Test PO...

Page 18: ...rposes 6 3D Function Test Only 3D Model Pattern Generator MSHG 600 MSPG 6100 SUPPORT HDMI1 4 HDMI mode NO 872 pattern No 83 1 Please input 3D test pattern like below HDMI mode NO 872 pattern No 83 2 When 3D OSD appear automatically then select OK button 3 Don t wear a 3D Glasses Check the picture like below ...

Page 19: ...PI_SCK SDI SDO CS System EEPROM 256Kbit IC104 I2C_SCL SDA System EEPROM 256Kbit IC104 System EEPROM 256Kbit IC104 I2C_SCL SDA NAND FLASH 2Gbit IC102 PCM_A 0 7 NAND FLASH 2Gbit IC102 NAND FLASH 2Gbit IC102 PCM_A 0 7 DDR3 SDRAM 2Gbit IC1201 A MDQL 0 7 A MDQU 0 7 DDR3 SDRAM 2Gbit IC1201 DDR3 SDRAM 2Gbit IC1201 A MDQL 0 7 A MDQU 0 7 RXA0 RXA4 RXACK RXB0 RXB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CL...

Page 20: ...tics 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 IMPORTANT SAFETY NOTICE A2 A10 900 200 400 540 521 530 301 200T 910 120 300 510 ...

Page 21: ..._TS_DATA 5 PCM_D 2 PCM_A 14 CI_TS_DATA 4 SCART1_Lout PCM_REG HP_ROUT PCM_IOWR CI_TS_DATA 1 PCM_RST PCM_A 12 CI_TS_VAL CI_TS_DATA 3 PCM_WAIT SCART1_Rout CI_TS_DATA 6 PCM_D 4 PCM_A 8 DTV MNT_VOUT PCM_D 7 CI_DET PCM_OE SIDE_HP_MUTE CI_TS_DATA 7 S2_RESET PCM_IORD PCM_A 11 SC1_B COMP1_Pb SC1_G COMP1_Y SC1_R COMP1_Pr SC1 COMP1_L_IN SC1 COMP1_DET SC1 COMP1_R_IN FE_TS_DATA 1 FE_TS_DATA 2 FE_TS_DATA 3 FE_T...

Page 22: ..._ON_SEMI 1 GND 3 VCC 2 RESET R450 0 5 PD_ 3 5V R447 1 2K 1 PD_ 12V 560pF C467 50V L402 MLB 201209 0120P N2 R414 10K 12V 5V_Normal POWER_ON OFF_1 C418 0 1uF 50V 1 10V_VDDC POWER_DET RL_ON C420 22uF 16V R413 20K IC408 1 APX803D29 PWR_DET_ON_DIODES 1 GND 3 VCC 2 RESET 3 3V_Normal 12V R480 100 PD_ 24V R454 11K 1 R456 4 7K 1 16W 1 24V 3 5V_ST L407 MLB 201209 0120P N2 3 5V_ST 3 3V_Normal USB1_CTL R438 2...

Page 23: ...F 16V OPT R601 100 3 5V_ST L600 BLM18PG121SN1D KEY2 R602 10K 1 IR R600 100 C604 100pF 50V 3 5V_ST C603 1000pF 50V R603 10K 1 C602 0 1uF 16V KEY1 3 5V_ST R607 3 3K LED_R BUZZ P600 12507WR 08L 1 2 3 4 5 6 7 8 9 R610 1 8K L601 BLM18PG121SN1D CONTROL_FILTER L602 BLM18PG121SN1D CONTROL_FILTER C608 0 1uF 16V CONTROL_FILTER C609 0 1uF 16V CONTROL_FILTER R611 0 CONTROL_NO_FILTER R612 0 CONTROL_NO_FILTER I...

Page 24: ...NG IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 12 06 20 USB 7 NC4_S7LRM JK700 3AU04S 305 ZC LG 1 2 3 4 5 D700 RCLAMP0502BA OPT SIDE_USB1_DM SIDE_USB1_DP 5V_USB C700 22uF 10V USB SIDE Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 25: ..._HDMI1_VARISTOR DDC_SCL_4 MHL_OCP_DET C801 0 047uF 25V R804 0 JK803 EAG62611204 14 NC 13 CE_REMOTE 5 D1_GND 20 BODY_SHIELD GND 12 CK 11 CK_GND 2 D2_GND 19 HP_DET 18 5V 10 CK 4 D1 1 D2 17 GND 9 D0 8 D0_GND 3 D2 16 DDC_DATA 7 D0 6 D1 15 DDC_CLK R815 10K Q804 E B C Q806 E B C Q805 E B C R813 10K R816 10K MHL_OCP_EN R802 0 R824 2 7K R825 2 7K R810 0 R831 300K VA801 ESD_HDMI1_VARISTOR VA802 ESD_HDMI R8...

Page 26: ... THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SPDIF 12 06 12 10 NC4_S7LRM 3 3V_Normal SPDIF_OUT JK1001 2F01TC1 CLM97 4F SPDIF JACK FOXCONN 3 VIN 2 VCC 1 GND 4 SHIELD C1002 100pF 50V C1001 0 1uF 16V JK1001 1 JST1223 001 SPDIF JACK SOLTEAM 1 GND 2 VCC 3 VINPUT 4 FIX_POLE SPDIF OPTIC JACK 5 15 Mstar Circuit Application SPDIF Copyright ⓒ 2013 LG Electronics Inc All right reserved Only f...

Page 27: ...1 Pol change RXB4 RXACK RXBCK RXA0 RXA2 LVDS NON EU RXA2 RXBCK RXB4 RXA3 RXA1 RXB2 RXB3 RXA3 RXBCK RXACK RXA2 RXA1 RXB1 RXB3 RXA3 RXA2 RXA0 RXA4 Shift RXBCK RXB2 RXA4 51Pin LVDS Connector For FHD 60Hz RXACK RXA3 RXACK RXB3 RXA3 RXA1 RXB0 RXA0 RXACK RXB3 LVDS_SEL RXA4 RXB3 RXA4 RXA2 RXA2 RXA1 RXB2 Pol change RXB4 RXB1 RXA4 RXACK RXB3 RXB0 RXB3 RXBCK RXB4 RXA0 RXA2 RXB0 RXB1 RXA3 RXA2 RXBCK RXB4 RXA...

Page 28: ...DQU4 A7 DQU5 A2 DQU6 B8 DQU7 A3 VREFCA M8 VREFDQ H1 ZQ L8 VDD_1 B2 VDD_2 D9 VDD_3 G7 VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 NC_6 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSSQ_2 B9 ...

Page 29: ...FLASH_OS 2012 06 20 13 NC4_S7LRM SPI_SCK 3 5V_ST 3 5V_ST C1300 0 1uF R1301 4 7K OPT SPI_CS SPI_SDO IC1300 MX25L8006EM2I 12G SPI_FLASH_MACRONIX 3 WP 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 HOLD 8 VCC R1302 33 R1300 10K OPT SPI_SDI FLASH_WP IC1300 1 W25Q80BVSSIG SPI_FLASH_WINBOND 3 WP IO2 2 DO IO1 4 GND 1 CS 5 DI IO0 6 CLK 7 HOLD IO3 8 VCC 3 5V_ST Serial Flash for SPI boot OS Copyright ⓒ 2013 LG Ele...

Page 30: ...C_SEL R3797 2 2K TW_FE_LNA R3736 1 TU_I2C_FILTER C3710 0 1uF 16V LNA_CTRL_1 C3713 18pF 50V TU_I2C_NON_FILTER C3701 0 1uF 16V DEMOD_SDA C3717 0 1uF 16V R3762 2K OPT R3748 11K FULL_NIM_BCD 3 3V_TU R3752 220 TU_BUFFER_VIDEO C3711 18pF 50V TU_I2C_NON_FILTER R3753 4 7K TU_BUFFER_SIF R3741 1 8K TU_IIC_ATSC_1 8K R3776 10K FULL_NIM_BCD R3740 3 2 2K TU_IIC_BR_2 2K C3725 0 1uF 16V IF_N_MSTAR 3 3V_Normal C37...

Page 31: ...7 HEAD_PHONE 3 DETECT 4 L 5 GND 1 R 3 3V_Normal R1504 10K HEAD_PHONE C1503 1000pF 50V OPT HP_LOUT R1503 1K HEAD_PHONE HP_DET 3 5V_ST HP_ROUT SIDE_HP_MUTE R1501 1K HEAD_PHONE C1502 1000pF 50V OPT R1502 1K HEAD_PHONE Q1502 MMBT3904 NXP HEAD_PHONE_POP E B C Q1503 MMBT3904 NXP HEAD_PHONE_POP E B C Q1505 MMBT3904 NXP HEAD_PHONE_POP E B C Q1504 MMBT3904 NXP HEAD_PHONE_POP E B C Q1501 MMBT3906 NXP HEAD_P...

Page 32: ... 0 1uF CVBS_TEST C1707 0 1uF CVBS_TEST 4 7uF C1708 CVBS_TEST JK1701 PPJ248 01 COMP_AV1 2 6D GN C SPRING 7D GN E LUG 4D GN CONTACT 5E BL C SPRING 8F RD1 E LUG S 6F RD1 C SPRING 4F RD1 CONTACT 5G WH1 C SPRING 4H RD2 CONTACT 6H RD2 C SPRING 7H RD2 E LUG 7A YL E LUG 6A YL C SPRING 4A YL CONTACT 5B WH2 C SPRING 4C RD3 CONTACT 6C RD3 C SPRING 7C RD3 E LUG D1711 COMP_Y_ZENER_ROHM D1703 COMP_Pr_ZENER_ROHM...

Page 33: ...7LRM EPHY_RN EPHY_TN EPHY_TP JK2100 XRJV 01V 0 D12 080 ETHERNET_XMULTIPLE 1 2 3 4 5 6 7 8 9 9 2 5V_Normal EPHY_RP C2104 0 01uF 50V ETHERNET L2101 BLM18PG121SN1D ETHERNET R2101 49 9 ETHERNET R2102 49 9 ETHERNET C2101 0 1uF ETHERNET R2104 49 9 ETHERNET C2102 0 1uF ETHERNET R2103 49 9 ETHERNET JK2100 1 RJ45VT 01SN002 ETHERNET_XML_EMI 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 ETHERNET H W option ETHERNET Co...

Page 34: ...SPK_R Q3401 MMBT3904 NXP E B C AUD_LRCH C3414 330pF 50V R3409 43 AUD_SCK AMP_RESET SPK_R R3411 43 C3407 0 1uF 16V POWER_DET 24V C3421 0 22uF 50V C3401 1000pF 50V C3409 0 1uF 16V AMP_SDA C3418 0 22uF 50V R3405 0 OPT SPK_R C3404 2 2uF 10V C3403 0 1uF 16V AUD_LRCK R3406 0 R3407 0 IC3401 STA380BWF 1 VCC_REG 2 VSS_REG 3 OUT2B 4 GND2 5 VCC2 6 OUT2A 7 OUT1B 8 VCC1 9 GND1 10 OUT1A 11 VDD_REG 12 GND_REG 13...

Page 35: ...HAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 2012 06 20 MSTAR DEBUG_4PIN 39 NC4_S7LRM RGB_DDC_SCL RGB_DDC_SDA P3900 12505WS 04A00 MSTAR_DEBUG_4P 1 2 3 4 5 JP_GND2 JP_GND3 JP_GND4 JP_GND1 MSTART DEBUG_4PIN Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 36: ...THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC RS232C_4P_OS 2012 06 20 40 NC4_S7LRM PM_RXD 3 5V_ST R4001 100 R4000 100 P4000 12507WS 04L RS232C_DEBUG_4P 1 VCC 2 PM_RXD 3 GND 4 RM_TXD 5 GND PM_TXD RS 232C Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 37: ...8 PCMDATA 2 GPIO131 AB22 PCMDATA 3 GPIO123 AE20 PCMDATA 4 GPIO122 AA15 PCMDATA 5 GPIO121 AE21 PCMDATA 6 GPIO120 AB21 PCMDATA 7 GPIO119 Y15 PCMADR 0 GPIO128 W20 PCMADR 1 GPIO127 V20 PCMADR 2 GPIO125 W22 PCMADR 3 GPIO124 AB18 PCMADR 4 GPIO102 AA20 PCMADR 5 GPIO104 AA21 PCMADR 6 GPIO105 Y19 PCMADR 7 GPIO106 AB17 PCMADR 8 GPIO111 Y16 PCMADR 9 GPIO113 AB19 PCMADR 10 GPIO117 AB20 PCMADR 11 GPIO115 AA16 ...

Page 38: ...50 D7 SPDIF_OUT GPIO151 D6 USB0_DM E3 USB0_DP E2 USB1_DM AC12 USB1_DP AE12 I2S_IN_BCK GPIO148 C8 I2S_IN_SD GPIO149 D8 I2S_IN_WS GPIO147 D9 I2S_OUT_BCK GPIO154 B10 I2S_OUT_MCK GPIO152 C9 I2S_OUT_SD GPIO155 B9 I2S_OUT_WS GPIO153 C10 AUL0 AB9 AUR0 AA11 AUL1 Y9 AUR1 AA9 AUL2 AA7 AUR2 AB8 AUL3 Y8 AUR3 Y10 AUL4 AC7 AUR4 AD7 GPIO_PM 13 GPIO19 W6 AUOUTL2 V6 AVDD5V_MHL V4 GPIO_PM 14 GPIO20 Y7 AUOUTR2 W5 GP...

Page 39: ......

Page 40: ...rror No power 7 7 Off when on off while viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GCSC System for...

Page 41: ...10 11 Check Link Cable LVDS reconnection condition A8 A9 12 Adjustment Test pattern ADJ Key A10 13 A Video error_Vertical Horizontal bar residual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Con Board 2 A ...

Page 42: ...ck record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 14 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable IR B ...

Page 43: ...replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 LCD TV Error symptom 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...ck Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close By using Digital signal level meter By using Diagnostics menu on OSD Menu Set up Support Signal Test Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N N Normal Picture Y Close N A6 Standard Repair Process Established date Revised date 3 14 L...

Page 45: ...s have problem or not By connecting RF Cable at other equipment Set Top Box Different maker TV etc A6 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom 2012 01 14 Contact with signal distributor or broadcaster Cable or Air Close N Check Tuner soldering Replace Main B D Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE In...

Page 46: ...ice and cable Y External device Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A7 N Y End Replace module Request repair for external device cable Color error Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 LCD TV Error symptom 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All r...

Page 47: ...g Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen n...

Page 48: ...ltage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 LCD TV Error symptom Stand By Red Close 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE ...

Page 49: ... REMOTE CONTROL POWEROFF_OFFTIMER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_...

Page 50: ...repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A15 A16 Disconnection Established date Revised date 9 14 LCD TV Error symptom Standard Repair Process 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...t and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 24V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Establishe...

Page 52: ...ry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A17 Normal Voltage Close N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A4 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 LCD TV Error symptom 2012 ...

Page 53: ...device cable RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date 12 14 LCD TV Error symptom Standard Repair Process 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...as shown in the solution manual For models without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 13 14 LCD TV...

Page 55: ...te controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 14 14 LCD TV Error symptom Standard Repair Process 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...MODE checking method A14 28 C Audio error_No audio Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking method A...

Page 57: ...ideo error_No video Normal audio ALL MODELS A1 Established date Revised date Error symptom Content LCD TV 2012 01 14 Power On disjoint back case check lighting at any point Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...Revised date Error symptom Content LCD TV 2012 11 17 Measure LED applying to LED Back Light from Power Board Output LED from Power Board supply to LED B L Check Pin contacting statement and connection statement LPB MODELS Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...ent LCD TV Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 8 3 After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ...tage measuring method A Video error_No video Audio A4 Established date Revised date Error symptom Content LCD TV Check the DC 24V 12V 3 5V 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...chnical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A5 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ... Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A6 Established date Revised date Error symptom Content LCD TV 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ... bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content LCD TV ALL MODELS 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...chnical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error ALL MODELS A8 A9 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ... using the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A10 Established date Revised date Error symptom Content LCD TV 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...n Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ...wer Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 68: ...endix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...ress damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ...ock Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...or _No power A11 Established date Revised date Error symptom Content LCD TV ST BY condition Red Front LED control Menu Option Power Indicator Standby light ON 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ... voltage and ST BY 3 5V B Power error _No power A12 Established date Revised date Error symptom Content LCD TV Check the DC 20V 24V 12V 3 5V 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 73: ... power is ON B Power error _No power A13 Established date Revised date Error symptom Content LCD TV Check power on Pin 1 pin is high about 3 3V 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...tandard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A14 Established date Revised date Error symptom Content LCD TV 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 75: ... to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video LA58xx A15 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 76: ... terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video ALL MODELS A16 Established date Revised date Error symptom Content LCD TV 2012 11 17 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only f...

Page 77: ...en it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error ALL MODELS A17 Established date Revised date Error symptom Content LCD TV P600 1 GND 2 KEY1 3 KEY2 4 St 3 5V 5 GND 6 RED_LED 7 IR 8 GND 2012 01 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training ...

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