LG 32LN52 Series Service Manual Download Page 71

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Standard Repair Process Detail Technical Manual

Check power input voltage and ST-BY 3.5V

B. Power error _No power

A12

Established

date

Revised

date

Error

symptom

Content

LCD TV

2013. 01 .09

Check the DC 24V (L421)

Check the ST-BY 3.3V (L405)

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 32LN52 Series

Page 1: ... MODEL 32LN52 32LN52 ZA 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: ...rved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 SCREW ASSEMBLY WORKING GUIDE 16 DISASSEMBLY WORKING GUIDE 17 BLOCK DIAGRAM 18 EXPLODED VIEW 21 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: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing 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 e...

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: ...C 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage AC 100 240 V 50 60 Hz Standard Voltage of each products is marked by models 4 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 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method follow...

Page 7: ...bia Albania Kazakhstan Belarus 2 Broadcasting system Analogue TV 1 PAL BG 2 PAL DK 3 PAL I I 4 SECAM BG 5 SECAM DK 6 SECAM L L Analogue TV RF VHF E2 to E12 UHF E21 to E69 CATV S1 to S20 HYPER S21 to S47 Digital TV 1 DVB T C Digital TV VHF UHF 3 Receiving system Analog Upper Heterodyne Digital COFDM QAM DVB T Guard Interval Bitrate_Mbit s 1 4 1 8 1 16 1 32 Modulation Code Rate QPSK 1 2 2 3 3 4 5 6 ...

Page 8: ...0 00 148 5 HDTV 1080P O FHD only DTV 1 720 480 31 47 59 94 27 00 SDTV 480P 2 720 480 31 50 60 00 27 027 SDTV 480P 3 720 576 31 250 50 00 27 00 SDTV 576P 4 1280 720 37 50 50 00 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 00 74 25 HDTV 1080I 8 1920 1080 33 75 60 00 74 25 HDTV 1080I 9 1920 1080 33 72 59 94 74 176 HDTV 1080I 10 1...

Page 9: ... MP3 Pro MP3 32kbps 320kbps Bit rate 32kHz 48kHz Sample rate AC3 AC3 32kbps 640kbps Bit rate 32kHz 44 1kHz 48kHz Sample rate MPEG MPA 32kbps 448kbps Bit rate 32kHz 48kHz Sample rate AAC HEAAC M4A 24kbps 3844kbps Bit rate 8kHz 96kHz Sample rate CDDA CDA 1 44kbps Bit rate 44 1kHz Sample rate LPCM AIF AIFF WAV 1 41Mbps 9 6Mbps Bit rate Multi channel 44 1kHz 88 2kHz Sample rate 48kHz 96kHz Sample rate...

Page 10: ...nnection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 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 downloaded version is High USB data is automatically detecting 3 Show the message Copying files fr...

Page 11: ...d 01 e 80 02 03 22 F1 4E 10 9F 04 13 05 14 03 02 12 20 21 90 22 15 01 26 15 07 50 09 57 07 f A0 f 01 1D 80 18 71 1C 16 20 58 2C 25 00 20 C2 B0 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 C0 20 C2 31 00 00 1E 02 3A 80 18 71 38 2D 40 58 2C D0 45 00 A0 5A 00 00 00 1E 01 1D 00 BC 52 D0 1E 20 E0 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 00 00 00 F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e MODEL ...

Page 12: ...to controller or push Adjustment R C P ONLY Enter the mode of White Balance the pattern will come out Mode Temp Coordinate spec Cool 13 000 K X 0 271 0 002 Y 0 270 0 002 Medium 9 300 K X 0 285 0 002 Y 0 293 0 002 Warm 6 500 K X 0 313 0 002 Y 0 329 0 002 NetCase4 Aging time Min Cool Medium Warm X y x y x y 271 270 285 293 313 329 1 0 2 281 287 295 310 320 342 2 3 5 280 285 294 308 319 340 3 6 9 278...

Page 13: ...72 One of the R B Gain is 254 3 if G Gain is 172 More than one of R B Gain is to be between 192 254 CASE Medium Warm 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 so make y a little more than the target ii Adjust x value by decreasing th...

Page 14: ...EEPROM Sub Address low 00 FF Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 6 2 Command Set Description FOS Default write 7mode data write Vtotal V_Frequency Sync_Polarity Htotal Hstart Vstart 0 Phase Data write Model Name and Serial Number write in EEPROM 6 3 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technolo...

Page 15: ...od 1 Communication Prot connection Connection PCBA USB Port USB to Serial Adapter UC 232A RS 232C cable PC RS 232C port Caution LJ21 chassis support only UC 232A driver only use this one 2 MAC Address Not use CI Key Download Set CI Key path Directory at Start Mac CI Download Programme Com 1 2 3 4 and 115200 Baudrate Port connection button click 1 Push the 2 MAC Address write At success Download ch...

Page 16: ...ew specification and application situation Warning Check Screw Type When Screw is assembled at A Part If B Screw is used at the A part Module will get damaged SCREW ASSEMBLY WORKING GUIDE FAB31339403 M3 L6 BK Machine 4EA FAB31639801 M4 L10 BK Taptite 9EA FAB30016124 M4 L14 BK Machine 2EA C C A A B B B A A A A A B A A ...

Page 17: ...s that bind StandAss y and set Disassemble 7 screws around the 4 edges of set after Separation Stand Ass y 1 2 Disassemble 4 screws that fix Side AV bracket and Back cover 3 After opening cover of IR Ass y Disconnect IR cable 4 5 6 After lifting up back cover slightly Disconnect SPK cable Remove the back cover and Disconnect LVDS and Power cable from Main PCB ...

Page 18: ...A380BWF IC3401 I2S USB_DM DP DDR3 2Gbit H5TQ2G63DFR PBC HYNIX IC1201 EEPROM 256Kbit RENESAS IC104 SC1_RGB DTV MNT_VOUT Audio L R IN Audio_L R OUT Full Scart DDR_Data 0 15 DQS DM USB SIDE SCL SDA SCL SDA Data SCL SDA Video AMP IC2802 TV Tuner DVB T C TDSS G501D HDMI1 10 SCL SDA Data 10 SCL SDA Serial Flash 8Mbit MACRONIX IC1300 SPI SCK SDI SC1_CVBS_IN 11 15 8 11 CI_DATA 0 7 8 CI_ADDR 8 14 7 CI_ADDR...

Page 19: ...rvice purposes 24V_Adapter 24V LED Driver IC404 DCDC IC 12V Q405 Audio AMP 24V IC401 DCDC IC 5V USB CI Normal Q409 12V PANEL Scart AMP IC400 DCDC IC 3 5V Q403 3 3V TU EEPROM NAND MAIN IC IC402 LDO 2 5V IC2603 LDO 1 8V MAIN IC TU IC403 DCDC IC IC407 LDO 1 1V MIAN IC Core 1 5V DDR NVRAM MAIN IC 2 POWER ...

Page 20: ...ice purposes I2C_SCKM2 I2C_SCAM2 NVRAM IC104 22Ω 3 3V_NORMAL I2S_IN_BCK I2S_IN_SD S7LRM MSD804KKX Audio AMP IC3400 I2C_SCKM1 I2C_SDAM1 1KΩ 33Ω 3 3V_TU 20pF TU_A DEMOD 2 2KΩ 1KΩ 3 3V_NORMAL 22Ω 20pF AMP_SDA SCL I2C_SDA SCL TU_SDA SCL SPI1_CK SPI1_DI T CON NVRAM 0Ω 3 3V_NORMAL 1KΩ 0Ω V COM_SDA SCL 3 I2C ...

Page 21: ...rical 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 manufacture...

Page 22: ... NC4_S7LRM C607 0 1uF 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...

Page 23: ... WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 13 03 27 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 ZD700 5V OPT USB SIDE Copyright 2013 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 24: ... OF THE SCHEMETIC S_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 Cop...

Page 25: ...A 11 C1913 0 1uF 16V PCM_A 14 PCM_IRQA CI_MDI 2 CI_OE CI_MIVAL_ERR CI_MDI 0 REG CI_ADDR 0 14 CI_CD1 CI_MDI 2 PCM_A 1 REG CI_TS_SYNC 5V_Normal PCM_A 4 R1926 33 C1906 10uF 10V PCM_A 12 CI_ADDR 12 CI_MISTRT AR1905 33 CI_MCLKI PCM_A 9 IC1901 74LVC1G32GW OR_GARE_CI_PHILIPS 3 GND 2 A 4 Y 1 B 5 VCC CI_TS_CLK C1905 0 1uF GND CI_ADDR 10 AR1909 33 AR1906 33 CI_IORD CI_TS_DATA 4 CI_MDI 5 CI_MDI 3 AR1901 33 R...

Page 26: ...PK_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 NC_1 14 NC_2 15 NC_3 16 NC_4 17 NC_5 18 NC_6 19 NC_7 20 NC_8 21 NC_9 22 NC_10 23 NC...

Page 27: ...NG IF IS ESSENTIAL THAT 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 rights reserved LGE Internal Use Only ...

Page 28: ...ING IF IS ESSENTIAL 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 rights reserved LGE Internal Use Only ...

Page 29: ...UFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 2012 07 04 EU_TP ERRC 41 NC4_S7LRM HP_DET BR_RESET_DEMOD RF_SWITCH_CTL HP_LOUT HP_ROUT SIDE_HP_MUTE EPHY_TN EPHY_RN EPHY_TP EPHY_RP LNA_CTRL_1 LNA_CTRL_2 IF_AGC_SEL DEMOD_SDA DEMOD_SCL S2_RESET LNA2_CTL EU NOT USED TP ERRC Copyright 2013 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 30: ...7 NC_7 T3 NC_5 M7 BA0 M2 BA1 N8 BA2 M3 CK J7 CK K7 CKE K9 CS L2 ODT K1 RAS J3 CAS K3 WE L3 RESET T2 DQSL F3 DQSL G3 DQSU C7 DQSU B7 DML E7 DMU D3 DQL0 E3 DQL1 F7 DQL2 F2 DQL3 F8 DQL4 H3 DQL5 H8 DQL6 G2 DQL7 H7 DQU0 D7 DQU1 C3 DQU2 C8 DQU3 C2 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...

Page 31: ...K EU D2811 20V ESD_SCART R2858 220K EU R2810 1K EU D2815 5 6V ESD_SCART DTV MNT_L_OUT R2816 75 EU R2861 2 2K EU R2818 12K EU D2810 20V ESD_SCART DTV MNT_R_OUT D2817 5 6V ESD_SCART SCART1_Lout D2819 5 6V ESD_SCART R2811 75 EU R2802 75 D2812 20V ESD_SCART 12V C2820 330pF EU D2816 20V ESD_SCART SC1_R COMP1_Pr D2818 5 6V ESD_SCART R2867 33K EU R2860 2 2K EU R2863 5 6K EU DTV MNT_L_OUT C2819 330pF EU S...

Page 32: ...8K 5V_HDMI_2 D821 RCLAMP0524PA ESD_HDMI_SEMTECH 1 8 2 7 3 6 4 5 9 10 R813 2 7K CEC_REMOTE_S7 R801 3 3K 5V_DET_HDMI_2 D808 ESD_HDMI D813 ESD_HDMI Q801 MMBT3904 NXP E B C 5V_HDMI_2 MHL_CD_SENSE MHL_OCP_EN VBUS_EN AVDD5V_MHL 5V_DET_HDMI_4 MHL_OCP_DET VA803 ESD_HDMI DDC_SDA_1 CK _HDMI1 VA804 ESD_HDMI HPD1 R809 10K D800 1 IP4283CZ10 TBA ESD_HDMI_NXP 3 GND_1 2 TMDS_CH1 4 TMDS_CH2 1 TMDS_CH1 5 TMDS_CH2 6...

Page 33: ... 5V_SOC_RESET IC401 TPS65281RGV 3 ROSC 2 COMP 4 RLIM 1 SS 5 EN_SW 6 FAULT 7 AGND 8 SW_OUT 9 SW_IN 10 FB 11 LX 12 BST 13 PGND 14 VIN 15 V7V 16 EN 17 EP IC402 TJ1118S 2 5 1 GND 2 OUT 3 IN C437 22uF 10V C430 10uF 10V 10uF C461 10V C423 2 2uF 10V C453 22uF 10V C456 22uF 10V C443 10uF 16V C472 22uF 10V D402 5V OPT D405 5V 24V_ADAPTER 3 5V_ST C427 0 01uF 50V R426 12K Q405 AO3407A G D S 24V POWER_ON OFF_...

Page 34: ... 5 1K R6902 100K C6916 10uF 35V OPT C6917 10uF 35V OPT C6918 10uF 35V OPT C6919 10uF 35V D6903 SF20D600D2 A2 C A1 R6942 150 R6943 150 R6944 150 R6938 150 R6945 150 R6939 150 R6940 150 R6941 150 R6918 470K 1 R6919 470K 1 R6908 1 R6936 1 R6950 1 R6947 1 R6948 1 R6949 1 R6952 1 R6909 1 R6946 1 R6951 1 R6953 1 R6954 1 R6955 1 R6956 1 R6957 1 R6958 1 R6959 1 42inch_Adapter R6960 1 42inch_Adapter R6961 ...

Page 35: ... 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 GPIO_PM 15 GPIO21 U5 AUVRM AD5 AUVAG AE5 AUVRP AC6 EARPHONE_OUTL AA6 EARPHONE_OUTR AB6 RP GPIO63 C6 TP GPIO60 C5 RN GPIO66 A6 LED1 GPIO59 C4 TN GPIO62 B5 GPIO61 C3 GPIO64 A3 GPIO65 B3 LED0 GPIO58 B4 IRIN GPIO4 N4 ARC0 T6 HWRESET N5 IC101 MSD...

Page 36: ...52_LVDS EU RXBCK RXA2 RXB4 RXB0 RXA0 RXB1 RXA4 RXBCK RXACK RXB4 RXB2 RXA2 RXA0 RXACK RXB4 RXB0 RXA4 RXA3 RXA1 RXA0 RXB1 RXBCK RXB2 RXA4 MIRROR RXA0 RXACK RXA1 RXACK RXA1 RXB3 RXA3 RXB2 RXB1 RXA3 RXACK EU pin assign is different from NON EU Because of position of HD wafer RXA0 RXA2 RXB2 RXB0 RXA1 RXA4 RXB4 RXA2 RXBCK RXA2 RXB0 RXBCK RXB3 RXB1 RXB4 RXB3 RXB3 RXACK Pol change RXBCK RXB1 RXB2 RXB2 RXB...

Page 37: ... 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 PCMADR 12 GPIO107 AA19 PCMADR 13 GPIO110 AC21 PCMADR 14 GPIO109 AA17 PCMREG_N GPIO126 Y2...

Page 38: ...610 TU_I2C_NON_FILTER 33 C2612 20pF 50V R2632 1 C2651 20pF 50V 1 8V_TU R2870 1K R2611 100 C2652 20pF 50V 3 3V_Normal TUNER_RESET C2642 10uF 10V IF_AGC_MAIN C2623 0 1uF 16V IF_AGC_SEL C2644 0 1uF 16V R2609 1 MLG1005SR27JT TU_I2C_FILTER TU_SDA IF_P_MSTAR 3 3V_TU 3 3V_TU R2871 1K R2610 1 MLG1005SR27JT TU_I2C_FILTER TU_SIF TU_CVBS R2601 10 R2602 10 TU2601 TDSS G501D B 5 3 3V 11 DLIF_ N 2 RESET 10 DLIF...

Page 39: ......

Page 40: ...eck 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 LVDS Cable Speaker Cable IR B D Cable 2...

Page 41: ... 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...Check 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 1...

Page 43: ...ker TV etc Y Change satellite setting match with installed ANT N Normal Picture Y N A6 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Normal setting Contact with signal distributor or broadcaster Cable or Air Close N Check Tuner soldering Replace Main B D 2013 01...

Page 44: ... cable Y External device Cable normal 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserve...

Page 45: ... error Connect other external device and cable Check normal operation of External Input and HDMI by connecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input HDMI DVI Request repair for external device Check S W Version Y N Check version S W Upgrade Y N Normal screen End Y N Replace Main B D Replace Module Screen normal End E...

Page 46: ...er Measure DC 24V from Adapter N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Adapter N Normal voltage Replace Adapter Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 LCD TV Error symptom Stand By Red Close 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal U...

Page 47: ...lanation Normal POWEROFF_REMOTEKEY Power off by 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_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except lis...

Page 48: ...er Check Speaker disconnection N Y Replace Speaker Replace Main B D End C Audio error No audio Normal video A15 A4 Disconnection Established date Revised date 9 14 LCD TV Error symptom Standard Repair Process 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ...nnect and check other external device N Y Normal audio Check and fix external device Replace Adapter 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 DC24V From Adapter Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Establish...

Page 50: ...Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A16 Normal Voltage N N Check 3 5V on Main B D Replace Adapter or Replace Main B D Adapter don t have problem A4 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A16 Replace Main B D Y A16 Standard Repair Process Established date Revised date 11 14 LCD TV Error symptom 2013 01 09 ...

Page 51: ...al device cable HDMI DVI 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...he 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 Error sympto...

Page 53: ...emote 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...on diagram A7 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 ...

Page 55: ...oltage measuring method A4 26 B Power error_Off when on off while viewing POWER OFF MODE checking method A14 27 C Audio error_No audio Normal video Voltage and speaker checking method when there is no audio A15 28 D Function error_ No response in remote controller key error Remote controller operation checking method A16 Continued from previous page Copyright 2013 LG Electronics Inc All rights res...

Page 56: ... A Video error_No video Normal audio ALL MODELS A1 Established date Revised date Error symptom Content LCD TV Power On disjoint back case check lighting at 2 points 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...te Revised date Error symptom Content LCD TV Measure DC 85_175V applying to Module from Power Board Output 85 175V from Power Board supply to Module Check Pin contacting statement and connection statement ALL MODELS 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ... Cool Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio ALL MODELS A3 Established date Revised date Error symptom Content LCD TV 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...d voltage measuring method A Video error_No video Audio A4 Established date Revised date Error symptom Content LCD TV Check the DC 24V L421 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ...c Standard Repair Process Detail Technical 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...op 1 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ...tal 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ...l Technical 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...rns 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ...oken 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 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...l Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ... Appendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 68: ...ge Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...l Block 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 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ...B Power error _No power A11 Established date Revised date Error symptom Content LCD TV ST BY condition Red Front LED control Menu Option Standby light ON 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...ge and ST BY 3 5V B Power error _No power A12 Established date Revised date Error symptom Content LCD TV 2013 01 09 Check the DC 24V L421 Check the ST BY 3 3V L405 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...r is ON B Power error _No power A13 Established date Revised date Error symptom Content LCD TV 2013 01 09 Check the DC 24V L421 Check the LED_ON HIGH IC6900 pin No 1 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 73: ...3 Standard 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 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...thod when there is no audio C Audio error_No audio Normal video ALL MODELS A15 Established date Revised date Error symptom Content LCD TV 2013 01 09 Check the DC 24V L3401 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 75: ...e when 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 A16 Established date Revised date Error symptom Content LCD TV P600 1 GND 2 KEY1 3 KEY2 4 3 5V_ST 5 GND 6 LED_R 7 IR 8 GND 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training...

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