LG 37LT660H Service Manual Download Page 37 | Manualshive

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Summary of Contents for 37LT660H

Page 1: ...EL 37LT660H 37LT660H ZA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED LCD 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: ...lectronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 BLOCK DIAGRAM 16 EXPLODED VIEW 17 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: ...rket 37Countries DTV Analog Total 36 countries DTV MPEG2 4 DVB T 37 countries UK Italy Germany France Spain Sweden Finland Nether lands Belgium Luxemburg Greece Denmark Czech Austria Hungary Swiss Croatia Turkey Norway Slovenia Poland Ukraine Portugal Ireland Morocco Latvia Estonia Lithania Rumania Bulgaria Russia Slovakia Bosnia Serbia Albania Kazakhstan Belarus DTV MPEG2 4 DVB C 37 countries UK ...

Page 7: ... DVI Audio In case of the RGB DVI Audio input 9 SDPIF out 1EA SPDIF out Some models LD21A LD21C are not supported 10 Earphone out 1EA Antenna AV1 AV2 Component RGB HDMI1 HDMI2 HDMI3 11 USB 1EA EMF DivX HD For SVC download JPEG MP3 DivX HD 12 DVB DVB T CI UK Finland Denmark Norway Sweden Russia Spain Ireland Luxemburg Belgium Netherland CI France Canal Italy DGTVi DVB C CI Switzerland Austria Slove...

Page 8: ... 1080 33 72 59 94 74 176 HDTV 1080I 9 1920 1080 67 50 60 00 148 50 HDTV 1080P 10 1920 1080 67 432 59 94 148 352 HDTV 1080P 11 1920 1080 27 00 24 00 74 25 HDTV 1080P 12 1920 1080 26 97 23 94 74 176 HDTV 1080P 13 1920 1080 33 75 30 00 74 25 HDTV 1080P 14 1920 1080 33 71 29 97 74 176 HDTV 1080P No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed DDC 1 640 350 31 468 70 09 25 17 EGA X 2 720 40...

Page 9: ...VT WXGA Х 7 1360 768 47 712 60 015 85 50 VESA WXGA O 8 1280 1024 63 981 60 020 108 0 VESA SXGA O 9 1600 1200 75 00 60 00 162 0 VESA UXGA X 10 1920 1080 67 50 60 00 148 5 HDTV 1080P O DTV 1 720 480 31 50 60 00 27 027 SDTV 480P 2 720 480 31 47 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 1280 720 44 96 59 94 74 176 HDTV 720P 5 1920 1080 33 75 60 00 74 25 HDTV 1080I 6 1920 1080 33 7...

Page 10: ...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 from memory 4 Updating is starting 5 Updating Completed The TV will restart automaticall...

Page 11: ...the mode of White Balance the pattern will come out Auto control interface and directions 1 Adjust in the place where the influx of light like floodlight around is blocked illumination is less than 10 lux 2 Adhere closely the Color analyzer CA210 to the module less than 10 cm distance keep it with the surface of the Module and Color analyzer s prove vertically 80 100 3 Aging time After aging start...

Page 12: ...trolled Check sum 4 4 1 Auto Download After enter Service Mode by pushing ADJ key Enter EDID D L mode Enter START by pushing OK key Caution Never connect HDMI D sub Cable when EDID downloaded EDID data and Model option download RS232 4 4 2 Manual Download Caution 1 Use the proper signal cable for EDID Download Analog EDID Pin3 exists Digital EDID Pin3 exists 2 Never connect HDMI D sub Cable at the...

Page 13: ... 5A 00 00 00 1E 01 1D 00 72 51 D0 1E 20 50 6E 28 55 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d 70 d 00 e 80 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 90 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF A0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF B0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF C0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF D0 ...

Page 14: ...PROM 5 3 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Serial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded by OTA or Service man sometimes model name or serial num...

Page 15: ...LGset 1 Check the method of CI Key value a Check the method on Instart menu b Check the method of RS232C Command 1 Into the main ass y mode RS232 aa 00 00 2 Check the key download for transmitted command RS232 ci 00 10 3 Result value Normally status for download OKx Abnormally status for download NGx 2 Check the method of CI key value RS232 1 Into the main ass y mode RS232 aa 00 00 2 Check the mot...

Page 16: ... RX Speaker Out Audio amp TPA6011A4PWPRG4 L R_BTL Up Down 74LVC16244 Buffer Pro Idiom FE_TS_DATA 0 CI_TS_DATA 0 7 S7LR X tal 24M 51P 30P MX25L8006EM2I F SCART IF_N P_MSTAR DDR3 1GB IC1201 NAND Flash HYNIX 2G IC102 Digital amp NTP7000 IC501 Pb SC1_CVBS R G B FB_IN I2S Tuner S001D TU3702 P1901 Buffer IC1902 PCM_A 0 7 TU_CVBS PCM_A 0 7 DDR3 1GB IC1202 B_TMDQ 0 16 MIC2009YM6 USB Power IC402 USB Power ...

Page 17: ...any 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 ma...

Page 18: ...02 R25 SPI2_CK GPIO203 T21 SPI2_DI GPIO204 T22 NF_CE1Z GPIO138 AE18 NF_WPZ GPIO198 AC17 NF_CEZ GPIO137 AD18 NF_CLE GPIO136 AC18 NF_REZ GPIO139 AC19 NF_WEZ GPIO140 AD17 NF_ALE GPIO141 AE17 NF_RBZ GPIO142 AD19 GPIO_PM 0 GPIO6 H5 PM_UART_TX GPIO_PM 1 GPIO7 K6 GPIO_PM 2 GPIO8 K5 GPIO_PM 3 GPIO9 J6 GPIO_PM 4 GPIO10 K4 PM_UART_RX GPIO_PM 5 GPIO11 L6 PM_SPI_SCZ1 GPIO_PM 6 GPIO12 C2 GPIO_PM 7 GPIO13 L5 GP...

Page 19: ...P T1 GIN1M T2 BIN1P R2 BIN1M R1 SOGIN1 T3 HSYNC2 AA2 RIN2P Y2 RIN2M AA3 GIN2P W2 GIN2M Y3 BIN2P V1 BIN2M W3 SOGIN2 W1 CVBS0 AA8 CVBS1 Y4 CVBS2 W4 CVBS3 AA5 CVBS4 Y5 CVBS5 AA4 CVBSOUT0 Y6 CVBSOUT1 AA1 VCOM AB4 VIFP AC4 VIFM AD3 IP AC3 IM AE3 SIFP AD4 SIFM AC5 IF_AGC AD2 RF_AGC AE2 I2C_SCKM1 GPIO75 AE6 I2C_SDAM1 GPIO76 AD6 XIN AD1 XOUT AC1 SPDIF_IN GPIO152 D7 SPDIF_OUT GPIO153 D6 USB0_DM E3 USB0_DP ...

Page 20: ...NTP10 12 P75 EX21 KR5 INTP9 13 P74 EX20 KR4 INTP8 14 P73 EX19 KR3 15 P72 EX18 KR2 16 P71 EX17 KR1 17 P70 EX16 KR0 18 P06 WAIT 19 P05 CLKOUT 20 EVSS1 21 P80 EX0 22 P81 EX1 23 P82 EX2 24 P83 EX3 25 P84 EX4 26 P85 EX5 27 P86 EX6 28 P87 EX7 29 P30 INTP3 RTC1HZ 30 EVDD1 31 P50 EX8 32 P51 EX9 33 P52 EX10 34 P53 EX11 35 P54 EX12 36 P55 EX13 37 P56 EX14 38 P57 EX15 39 P17 EX31 TI02 TO02 40 P16 EX30 TI01 T...

Page 21: ...5V_ST 0 1uF 16V C475 3 5V_ST 10K R426 100 R402 10K R433 2 5V_Normal 3 3V_Normal 10K R428 22K R438 FW20020 24S P403 NORMAL_EXPEPT_32 19 14 9 4 18 13 8 3 17 12 7 2 16 11 6 1 20 15 10 5 21 22 23 24 BLM18PG121SN1D L420 3 3V_Normal 3 5V_ST 22K R431 10uF 10V C461 ERROR_OUT 10K R461 OPT 3 5V_ST 12V 15V 11K 1 R411 BLM18PG121SN1D L403 BLM18PG121SN1D L425 6 8K OPT R418 3 5V_ST 0 1uF 16V C441 2 7K 1 PD_ 12V ...

Page 22: ... 0 1uF 50V C501 24V 1N4148W 100V OPT D504 1N4148W 100V OPT D502 22000pF 50V C518 BLM18PG121SN1D L502 390pF 50V C531 0 1uF 16V C513 12 R511 AMP_SCL 390pF 50V C532 0 01uF 50V OPT C525 12 R509 SPK_L 100 R503 24V_AMP 22000pF 50V C526 3 5V_ST 1N4148W 100V OPT D503 4 7K R516 24V_AMP 1uF 25V C534 33pF 50V C507 1N4148W 100V OPT D501 3 3 OPT R507 10K R502 100 R504 10K R501 1000pF 50V C504 4 7K R518 12 R513...

Page 23: ...OPT 10K R630 OPT 10K R621 OPT BLM18PG121SN1D L600 BLM18PG121SN1D L601 BLM18PG121SN1D L602 IR_OUT_CTRL 30K R601 IR_OUT_RS232C 22 R606 22 R604 5V_ST 30K R600 10K R616 5V_ST 10K R619 5V_ST 10K R617 IR_OUT_HDMI2 30K R602 5V_ST IR_OUT_SIDE_HDMI 10K R618 IR_OUT_HDMI1 22 R603 22 R605 12507WR 10L P601 1 2 3 4 5 6 7 8 9 10 11 200pF 5 6V D600 200pF 5 6V D601 5 48VTO5 76V ZD600 5 48VTO5 76V ZD601 OPT 5 48VTO...

Page 24: ... R702 51Pin LVDS Connector For FHD 60 120Hz 30Pin LVDS Connector For HD 60Hz_Normal BIT_SEL AUO GND LGD NC LVDS_SEL LVDS_SEL 2 0 1 1 0 8 2 1 7 2 0 EMEA INTERACTIVE LVDS WAFER GP4_MSTAR SCANNING_EN RXA4 RXA3 RXB4 RXA3 RXACK RXA4 RXB4 Pol change RXB2 RXB4 RXB3 RXB4 RXA1 RXB2 RXA0 RXB0 RXA0 RXB2 RXB4 RXA3 RXB0 RXA2 RXB2 RXA4 RXA2 RXA0 RXB3 RXB4 RXBCK RXBCK Change in S7LR RXB3 RXB1 RXB3 RXACK RXB1 RXA...

Page 25: ...2 _HDMI4 HDMI_CEC D2 _HDMI2 5V_HDMI_2 D0 _HDMI4 3 5V_ST 10K R856 OPT D1 _HDMI4 D2 _HDMI1 D2 _HDMI1 3 3K R802 2 7K R891 HDMI_SIDE 5V_HDMI_4 DDC_SDA_4 CEC_REMOTE_S7 3 3K R801 HPD1 0 1uF 16V C801 5V_HDMI_1 D1 _HDMI1 0 R824 100 R855 3 5V_ST 10K R814 D805 CEC_REMOTE_NEC 100 R813 OPT 0 1uF 16V C804 68K R816 AVRL161A1R1NT OPT D806 68K R812 IR_OUT_HDMI1 0 R809 0 R810 IR_OUT_HDMI2 0 R811 IR_OUT_SIDE_HDMI C...

Page 26: ...ST CDS3C30GTH 30V OPT D1000 100 R1001 0 1uF C1004 0 1uF C1001 100 R1002 SPG09 DB 009 JK1000 1 2 3 4 5 6 7 8 9 10 EAN41348201 MAX3232CDR IC1000 3 C1 2 V 4 C2 1 C1 6 V 5 C2 7 DOUT2 8 RIN2 9 ROUT2 10 DIN2 11 DIN1 12 ROUT1 13 RIN1 14 DOUT1 15 GND 16 VCC CDS3C30GTH 30V OPT D1001 EXT_12V EXT_5V IR_OUT_RS232C 0 R1000 3 5V_ST 47K R1003 OPT 1K R1004 UART_TX 1SS355 90V D1002 RS232C_9PIN RS232C EMEA INTERACT...

Page 27: ...l USB1_OCD DSUB_R 5V_Normal 100pF 50V C1121 2 2K R1139 22 R1141 0 1uF 16V C1129 18pF 50V C1128 USB1_CTL AP2191DSG EAN61849601 IC1103 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC 1K R1128 HEAD_PHONE HP_ROUT 10K R1111 1K R1155 HEAD_PHONE 47 R1109 15K R1108 SIDE_HP_MUTE 75 R1137 4 7K OPT R1113 22 R1143 RCLAMP0502BA OPT D1100 DSUB_HSYNC 100pF 50V C1107 10uF 16V C1119 HEAD_PHONE 10K R1110 18pF 5...

Page 28: ..._DQSL K24 B_DDR3_DQSLB K25 B_DDR3_DQSU J21 B_DDR3_DQSUB J20 B_DDR3_DQML H24 B_DDR3_DQMU L20 B_DDR3_DQL 0 L23 B_DDR3_DQL 1 J24 B_DDR3_DQL 2 L24 B_DDR3_DQL 3 J23 B_DDR3_DQL 4 M24 B_DDR3_DQL 5 H23 B_DDR3_DQL 6 M23 B_DDR3_DQL 7 K23 B_DDR3_DQU 0 G21 B_DDR3_DQU 1 L22 B_DDR3_DQU 2 H22 B_DDR3_DQU 3 K20 B_DDR3_DQU 4 H20 B_DDR3_DQU 5 L21 B_DDR3_DQU 6 H21 B_DDR3_DQU 7 K21 0 01uF 50V C1240 0 01uF 50V C1209 H5...

Page 29: ...B C 3 5V_ST 0 1uF C1300 4 7K R1302 OPT SPI_CS SPI_SDO MX25L8006EM2I 12G IC1300 S_FLASH_MAIN_MACRONIX 3 WP 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 HOLD 8 VCC 33 R1303 10K R1301 OPT SPI_SDI FLASH_WP 0 OPT R1300 W25Q80BVSSIG IC1300 1 S_FLASH_MAIN_WINBOND 3 WP IO2 2 DO IO1 4 GND 1 CS 5 DI IO0 6 CLK 7 HOLD IO3 8 VCC 3 5V_ST 3 3V_Normal 0 R1304 OPT 0 R1305 EMEA INTERACTIVE GP4_MSTAR 2 0 1 1 0 8 2 1 S FL...

Page 30: ...400 5 3 3V 11 DIF N 2 RESET 10 DIF P 4 SDA 1 NC 9 IF_AGC 8 CVBS 3 SCL 7 1 8V 6 SIF 12 SHIELD TDSS H101F TU1400 1 SI2176_ATSC_1INPUT_H 5 B1 3 3V 11 DIF N 2 RESET 10 DIF P 4 SDA 1 NC 9 IF_AGC 8 CVBS 3 SCL 7 B2 1 8V 6 SIF 12 SHIELD 1K R1407 1K R1408 AZ1117BH 1 8TRE1 IC1400 1 ADJ GND 2 OUT 3 IN 100uF 16V C1410 CIS21J121 L1400 MMBT3906 NXP Q1400 NON_ASIA_TU E B C MMBT3906 NXP Q1401 NON_ASIA_TU E B C TD...

Page 31: ...G2 IO1_18 F1 IO1_19 H5 IO1_20 J1 IO1_23 K2 IO1_24 L3 IO1_25 K1 IO1_26 L1 IO1_27 L2 IO1_28 N1 IO1_30 M2 IO1_31 N2 IO1_32 M3 IO1_33 L5 IO1_34 M4 IO1_35 N3 IO1_36 K5 IO1_37 L4 IO1_38 R1 IO1_39 P2 IO1_40 P3 IO1_41 N4 IO1_42 R2 IO4_1 T2 IO4_2 R3 IO4_3 P4 IO4_4 R4 IO4_5 T4 IO4_6 R5 IO4_7 M5 IO4_9 M6 IO4_10 N5 IO4_11 N6 IO4_12 R6 IO4_14 M7 IO4_15 T6 IO4_16 R7 IO4_17 N7 IO4_19 T8 IO4_21 M8 IO4_22 N8 IO4_2...

Page 32: ...EXT_SPK R1651 330pF C1664 75 EU_OPT R1628 180 EU_OPT R1639 10K R1660 AV2 EXT_AMP_L_IN SC1_G COMP1_Y 33pF EU_OPT C1655 EXT_AMP_L 330pF 50V C1611 COMP2_R_IN 220K R1643 1000pF 50V EU_OPT C1609 DTV MNT_VOUT EXT_AMP_R 33pF EXT_SPK C1605 SC1 COMP1_DET 33K EU_OPT R1665 0 1uF 50V EU_OPT C1625 SC1_FB 220K EXT_SPK R1653 SCART1_MUTE 470K R1607 75 R1604 DTV MNT_L_OUT 330pF EXT_SPK C1613 3 9K EU_OPT R1629 EXT_...

Page 33: ...B1 6 SELECT 5 VCC ONSEMICONDUCTOR NLASB3157DFT2G EAN38256201 ANALOGSWITCH IC1701 3 B0 2 GND 4 A 1 B1 6 SELECT 5 VCC EXT_VOL 3 5V_ST ONSEMICONDUCTOR NLASB3157DFT2G EAN38256201 ANALOGSWITCH IC1706 3 B0 2 GND 4 A 1 B1 6 SELECT 5 VCC 3 5V_ST 4 7K R1724 0 OPT R1723 0 1uF C1712 UART_RX ONSEMICONDUCTOR NLASB3157DFT2G EAN38256201 ANALOGSWITCH IC1703 3 B0 2 GND 4 A 1 B1 6 SELECT 5 VCC 100 R1727 I2C_SDA MST...

Page 34: ...OUT R1822 100K POWER_OUT R1823 0 1uF 16V OPT C1815 100 POWER_OUT R1806 1 16W 1 2K POWER_OUT R1819 EXT_PWR_DET CB3216PA501E POWER_OUT L1800 43 POWER_OUT R1820 12V EXT_12V 0 1uF 50V POWER_OUT C1817 EXT12V_CTRL MP5000DQ POWER_OUT IC1803 3 ENABLE FAULT 2 DV DT 4 I LIMIT 1 GND 5 NC 6 SOURCE_1 7 SOURCE_2 8 SOURCE_3 9 SOURCE_4 10 SOURCE_5 11 VCC 1K POWER_OUT R1818 CB3216PA501E POWER_OUT L1804 THERMAL TPS...

Page 35: ...OE 6 1A3 5 2Y3 7 2Y2 8 1A4 9 2Y1 10 GND 11 2A1 12 1Y4 13 2A2 14 1Y3 15 2A3 16 1Y2 17 2A4 18 1Y1 19 2OE 20 VCC PCM_REG CI_MDI 2 5V_Normal CI_MDI 0 CI_MCLKI CI_MIVAL_ERR 33 AR1904 0 OPT R1910 PCM_A 5 PCM_CE 22K R1914 CI_MDI 7 PCM_A 2 CI_MISTRT 33 AR1905 47 R1915 PCM_WE CI_MDI 4 10K R1903 3 3V_CI 100 R1920 10K R1912 OPT PCM_A 10 5V_Normal FE_TS_VAL_ERR CI_DATA 0 7 33 AR1906 CI_ADDR 5 CI_TS_DATA 7 CI_...

Page 36: ...AS2 2 MDS62110209 GAS3 5 8 5T_GAS MDS62110209 GAS5 5 8 5T_GAS MDS62110209 8 5T_GAS GAS6 5 MDS62110205 7 5T_GAS GAS1 2 MDS61887708 12 5T_GAS GAS6 4 MDS62110204 5 5T_GAS GAS6 1 MDS61887708 12 5T_GAS GAS2 4 MDS61887708 12 5T_GAS GAS1 4 MDS62110204 5 5T_GAS GAS2 1 MDS62110205 7 5T_GAS GAS6 2 MDS62110205 7 5T_GAS GAS7 2 MDS62110204 5 5T_GAS GAS5 1 MDS62110204 5 5T_GAS GAS7 1 MDS62110209 GAS2 5 8 5T_GAS...

Page 37: ......

Page 38: ...B Power error No power 6 7 Off when on off while viewing power auto on off 7 8 C Audio error No audio Normal video 8 9 Wrecked audio discontinuation noise 9 10 D Function error No response in remote controller key error recording error memory error 10 11 External device recognition error 11 12 E Noise Circuit noise mechanical noise 12 13 F Exterior error Exterior defect 13 1 Trouble Shooting Copyr...

Page 39: ... End Always check 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 13 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A28 A7 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable ...

Page 40: ... and 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 13 LCD TV Error symptom 2 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...eck Tuner soldering Normal Picture Y N Y Close Close By using Digital signal level meter By using Diagnostics menu on OSD Menu Setup Manual Tuning Signal strength Normal over 30 Signal Quality Normal over 30 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N Normal Picture Y Close N Standard Repair Process Established date Revised date 3 13 LCD TV Error symptom 3 N Norm...

Page 42: ...external device 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 N Y End Replace module Request repair for external device cable Color error Check Test pattern Standard Repair Process Established date Revised date 4 13 LCD TV Error symptom 4 Copyright 2012 LG Electronics Inc All rights reserv...

Page 43: ... and HDMI DVI by connecting 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...

Page 44: ...e of each output of Power B D N Y Normal voltage Replace Main B D N 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 A17 A18 A19 A4 Standard Repair Process Established date Revised date 6 13 LCD TV Error symptom 6 Stand By Red Operating white Close Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 45: ...EY 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_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Dow...

Page 46: ...ard and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A24 A25 Disconnection Established date Revised date 8 13 LCD TV Error symptom Standard Repair Process 8 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...ect 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 20V or 24V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End E...

Page 48: ...place Baterry of R C Check Repair Cable connection Connector solder Normal operating Check 3 5V On Main B D A27 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 A27 Replace Main B D Y A27 Standard Repair Process Established date Revised date 10 13 LCD TV Error symp...

Page 49: ...rnal 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 11 13 LCD TV Error symptom Standard Repair Process 11 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...ceed 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 12 13 L...

Page 51: ...remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 13 13 LCD TV Error symptom Standard Repair Process 13 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...tc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A6 Established date Revised date Error symptom Content LCD TV A6 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...top 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A7 Established date Revised date Error symptom Content LCD TV A7 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...erns 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 A12 Established date Revised date Error symptom Content LCD TV A12 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ...older 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 A 1 5 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...r Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 A 2 5 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...dix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...ss damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage A 4 5 Un repairable Cases In this case please exchange the module Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...k 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 A 5 5 Un repairable Cases In this case please exchange the module Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ... 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A22 Established date Revised date Error symptom Content LCD TV A22 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...ff to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A24 Established date Revised date Error symptom Content LCD TV A24 Copyright 2012 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

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