LG 47LK950S Service Manual Download Page 1

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LED LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LD12B

MODEL : 37LV470S

37LV470S-ZC

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 : MFL67002352 (1107-REV00)

Summary of Contents for 47LK950S

Page 1: ... READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD12B MODEL 37LV470S 37LV470S ZC 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 MFL67002352 1107 REV00 ...

Page 2: ...pyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 8 BLOCK DIAGRAM 14 EXPLODED VIEW 15 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...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 phone jacks etc If the exposed metallic part has a return path t...

Page 4: ...U PAL Market 36Countries DTV Analog Total 36 countries DTV MPEG2 4 DVB T 31 countries England Italy Germany France Spain Sweden Finland Netherlands Belgium Luxemburg Greece Denmark Czech Austria Hungary Swiss Croatia Turkey Norway Slovenia Poland Ukraine Portugal Ireland Moroco Latvia Estonia Lithania Rumania Russia Slovakia DTV MPEG2 4 DVB T2 5 countries England Sweden Finland Denmark Norway DTV ...

Page 5: ...16 QAM 1 2 2 5 2 3 3 4 5 6 64 QAM 1 2 2 5 2 3 3 4 5 6 256 QAM 1 2 2 5 2 3 3 4 5 6 G DVB S Symbolrate DVB S2 8PSK QPSK 2 45Msymbol s DVB S QPSK 2 45Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 4 Scart Jack 1EA PAL SECAM Scart Jack is Full scart and support RF OUT analog DTV Not support DTV Auto AV 5 Video Input RCA 1EA PAL SECAM NTSC 4System PAL SECA...

Page 6: ...TV 720p 8 1280x720 44 96 59 94 HDTV 720p 9 1280x720 45 00 60 00 HDTV 720p 10 1920x1080 31 25 50 00 HDTV 1080i 11 1920x1080 33 75 60 00 HDTV 1080i 12 1920x1080 33 72 59 94 HDTV 1080i 13 1920x1080 56 250 50 HDTV 1080p 14 1920x1080 67 5 60 HDTV 1080p No Specification Proposed Remarks Resolution H freq kHz V freq Hz Pixel Clock MHz 1 720 400 31 468 70 08 28 321 For only DOS mode 2 640 480 31 469 59 94...

Page 7: ...08 875 SXGA HDCP FHD model 7 1920 1080 67 5 60 00 138 625 WUXGA HDCP FHD model 2 PC Mode No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 720 480 31 469 31 5 59 94 60 27 00 27 03 SDTV 480P 2 720 576 31 25 50 54 SDTV 576P 3 1280 720 37 500 50 74 25 HDTV 720P 4 1280 720 44 96 45 59 94 60 74 17 74 25 HDTV 720P 5 1920 1080 33 72 33 75 59 94 60 74 17 74 25 HDTV 1080I 6 1920 1080 28 ...

Page 8: ...ng module is in the circumstance of below 20 C it should be placed in the circumstance of above 15 C for 3 hours Caution When still image is displayed for a period of 20 minutes or longer especially where W B scale is strong Digital pattern 13ch and or Cross hatch pattern 09ch there can some afterimage in the black level area 3 Automatic Adjustment 3 1 MAC Address 1 Equipment Condition Play file S...

Page 9: ...rt menu Factory name displayed ex 32LV3700 ZA e Check the Diagnostics DTV country only Buyer model displayed ex 32LV3700 4 Manual Adjustment 4 1 EDID The Extended Display Identification Data DDC Display Data Channel download 1 Overview It is a VESA regulation A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input It is a realization of Plug...

Page 10: ...MD Command VAL FOS Data value CS Checksum of sent data A Acknowledge Ex Send JA_00_DD Ack A_00_okDDX A RS 232C Command used during auto adj Ex wb 00 00 Begin white balance auto adj wb 00 10 Gain adj ja 00 ff Adj data jb 00 c0 wb 00 1f Gain adj completed wb 00 20 Start wb 00 2f completed Off set adj wb 00 ff End white balance auto adj 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C...

Page 11: ...ition and cautionary items 1 Lighting condition in surrounding area Surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10 cm 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 n...

Page 12: ...tion is done using or GF key 5 Tool Option selection Method Press ADJ key on the Adjustment remote control then select Tool option 6 Ship out mode check In stop After final inspection press IN STOP key of the Adjustment remote control and check that the unit goes to Stand by mode 7 GND and Internal Pressure check 7 1 Method 1 GND Internal Pressure auto check preparation Check that Power Cord is fu...

Page 13: ...ssage Copying files from memory 4 Updating is starting 5 Updating Completed the TV will restart automatically 6 If your TV is turned on check your updated version and Tool option explain the Tool option next stage If downloading version is more high than your TV have TV can lost all channel data In this case you have to channel recover if all channel data is cleared you didn t have a DTV ATV test ...

Page 15: ...lectrical 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 manufac...

Page 16: ...T0_L1P AF28 TXOUT0_L2N AG27 TXOUT0_L2P AG28 TXCLK_LN AE26 TXCLK_LP AF26 TXOUT0_L3N AH27 TXOUT0_L3P AG26 TXOUT0_L4N AF25 TXOUT0_L4P AE25 TXOUT0_U0N AH26 TXOUT0_U0P AG25 TXOUT0_U1N AE24 TXOUT0_U1P AD24 TXOUT0_U2N AH25 TXOUT0_U2P AF24 TXCLK_UN AE23 TXCLK_UP AD23 TXOUT0_U3N AG24 TXOUT0_U3P AF23 TXOUT0_U4N AC22 TXOUT0_U4P AD22 TXOUT1_L0N AG23 TXOUT1_L0P AH23 TXOUT1_L1N AE22 TXOUT1_L1P AE21 TXOUT1_L2N A...

Page 17: ... TDATD_6 GPIO K3 TDATD_7 GPIO L1 TSTRTD GPIO L3 TVLDD GPIO L2 MPEG_CLK GPIO P4 MPEG_D_0 GPIO T2 MPEG_D_1 GPIO R3 MPEG_D_2 GPIO R2 MPEG_D_3 GPIO P3 MPEG_D_4 GPIO P2 MPEG_D_5 GPIO P1 MPEG_D_6 GPIO R6 MPEG_D_7 GPIO N5 MPEG_SYNC GPIO T4 MPEG_DATA_EN GPIO P5 MCIF_RESET GPIO R4 MCIF_SCLK GPIO U1 MCIF_SCTL GPIO T3 MCIF_SDI GPIO T1 MCIF_SDO GPIO T5 VI_IFP0 C17 VI_IFM0 B17 VDDR_AGC D15 AGC_SDM_2 B16 AGC_SD...

Page 18: ...NCM_CVBS3 B19 VI_CVBS4 C20 VI_INCM_CVBS4 B20 VI_SIF1_1 E19 VI_INCM_SIF1_1 D19 VI_SIF1_2 E10 VI_INCM_SIF1_2 F11 LGE35230 BCM35230KFSBG IC101 NON_BCM_CAP SPDIF_INC_P B15 SPDIF_INC_N C15 SPDIF_IND_P C14 SPDIF_IND_N B14 I2SSCK_IN GPIO G4 I2SWS_IN F4 I2SSD_IN GPIO G5 AADC_LINE_L1 C25 AADC_LINE_R1 B24 AADC_INCM1 A24 AADC_LINE_L2 E22 AADC_LINE_R2 E23 AADC_INCM2 D23 AADC_LINE_L3 C24 AADC_LINE_R3 C23 AADC_...

Page 19: ...ADA_12 AA26 DDR_ADA_13 AA24 DDR_ADA_14 AD27 DDR_BAA_0 Y27 DDR_BAA_1 AB28 DDR_BAA_2 W24 DDR_RASA_N V24 DDR_CASA_N W25 DDR_WEA_N V26 DDR_CKEA U24 DDR_CKA01_P W27 DDR_CKA01_N W28 DDR_CKA23_P N28 DDR_CKA23_N N27 DDR_VREFA U23 DDR_RST_N AA23 DDR_ZQ W26 C421 2 2uF C403 2 2uF C407 2 2uF NFM18PS105R0J C410 6 3V OUT IN GND NFM18PS105R0J C432 6 3V OUT IN GND NFM18PS105R0J C433 6 3V OUT IN GND NFM18PS105R0J ...

Page 20: ...IC504 AP2132MP 2 5TRG1 EAN61387601 3 VIN 2 EN 4 VCTRL 1 PG 5 NC 6 VOUT 7 ADJ 8 GND 9 EP 12V 24V 5V_Normal C545 10uF 16V R549 4 7K 1 Q507 AO3407A G D S R506 330 L511 MLB 201209 0120P N2 12V_PANEL ERROR_OUT_24 R546 1K 12V C580 0 1uF 16V A_DIM POWER_DET P501 SMAW200 H24S2 SLIM_32 55 19 12V 14 GND 9 3 5V 4 24V 18 INV ON 13 GND 8 GND 3 24V 17 12V 12 3 5V 7 GND 2 24V 16 GND V sync 11 3 5V 6 GND 1 PWR ON...

Page 21: ...D0 EEPROM_SDA HDMI_CEC SDA2_3 3V R630 22 WIRELESS_DET NEC_ISP_Rx IC602 uPD78F0514 NEC_MICOM 1 P60 SCL0 2 P61 SDA0 3 P62 EXSCL0 4 P63 5 P33 TI51 TO51 INTP4 6 P75 7 P74 8 P73 KR3 9 P72 KR2 10 P71 KR1 11 P70 KR0 12 P32 INTP3 OCD1B 13 P31 INTP2 OCD1A 14 P30 INTP1 15 P17 TI50 TO50 16 P16 TOH1 INTP5 17 P15 TOH0 18 P14 RXD6 19 P13 TXD6 20 P12 SO10 21 P11 SL10 RXD0 22 P10 SCK10 TXD0 23 AVREF 24 AVSS 25 AN...

Page 22: ...SSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SCL2_3 3V R1602 33 LPB_42 47 55 SDA2_3 3V R1601 33 LPB_42 47 55 L DIM0_MOSI L DIM0_SCLK L DIM0_VS P1601 12507WR 08L 1 2 3 4 5 6 7 8 9 50 BCM35230 16 L_DIMMING Local Dimming Block Copyright 2011 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 23: ...2 CI_ADDR 1 CI_TS_CLK C1911 0 1uF 16V OPT R1969 10K CI CI_ADDR 9 C1915 0 1uF 16V OPT R1980 100 CI R1945 10K OPT R1966 10K CI R1985 10K CI R1936 0 OPT R1949 22 CI R1937 62 CI R1959 22 CI PCM_MCLKI PCM_TS_SYNC C1904 0 1uF CI CI_MIVAL_ERR CI_ADDR 13 CI_MISTRT R1947 22 CI PCM_ADDR 4 PCM_MDI 0 7 PCM_ADDR 9 3 3V_CI R1931 22 CI CI_ADDR 12 R1918 22 OPT R1903 22 CI PCM_MIVAL_ERR R1939 10K CI PCM_ADDR 12 PC...

Page 24: ... DCDC_GND R2313 0 LNB_GND 12V_LNB A_GND A_GND A_GND C2311 10uF 25V LNB R2301 33 LNB C2307 0 01uF 50V LNB SDA1_3 3V C2302 1uF 50V LNB LNB_INT R2304 4 7K LNB DCDC_GND A_GND C2306 22000pF LNB C2301 0 22uF 25V IC2301 A8290SETTR T LNB 1 BOOST 3 TCAP 7 TDI 9 VREG 10 SDA 11 ADD 12 SCL 13 NC_2 14 IRQ 15 NC_3 16 NC_4 17 NC_5 18 NC_6 19 BFC 20 NC_7 21 NC_8 22 BFO 23 NC_9 24 BFI 25 VIN 26 LX 27 GNDLX 28 LNB ...

Page 25: ...SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC CHBO_TS_SYNC CHBO_TS_SERIAL CHB_RESET CHBO_TS_VAL_ERR CHBO_TS_CLK TS Output 50 28 BCM35230 NON CHB NON CHB Copyright 2011 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 26: ...5V_HDMI_3 C3707 10uF C3714 1uF HDMI_HPD_3 R3733 10 3 3V_HDMI D0 _HDMI3 CK _HDMI3 C3709 0 1uF C3708 0 1uF HDMI_RX1 D2 _HDMI3 DDC_SCL_3 D1 _HDMI2 HDMI_CLK D0 _HDMI3 SCL3_3 3V CK _HDMI2 DDC_SDA_3 D2 _HDMI1 D2 _HDMI2 DDC_SDA_2 SDA3_3 3V CK _HDMI2 5V_Normal HDMI_HPD_2 HDMI_RX0 5V_HDMI_2 C3713 1uF C3712 1uF CK _HDMI3 5V_HDMI_1 CK _HDMI1 C3705 10uF R3738 10 D0 _HDMI1 DDC_SCL_2 C3710 0 1uF R3729 0 CK _HDM...

Page 27: ... 7K D3802 5 6V ESD_COMMON AMOTECH DSUB_G D3804 30V 3 3V_Normal 3 3V_Normal JK3803 KJA PH 0 0177 3 DETECT 4 L 5 GND 1 R EDID_WP R3820 OPT R3804 470K C3808 47pF 50V SIDE_HP_MUTE P3801 SPG09 DB 010 1 RED 2 GREEN 3 BLUE 4 GND_1 5 DDC_GND 6 RED_GND 7 GREEN_GND 8 BLUE_GND 9 NC 10 SYNC_GND 11 GND_2 12 DDC_DATA 13 H_SYNC 14 V_SYNC 15 DDC_CLOCK 16 SHILED R3817 4 7K JP3808 3 3V_Normal DSUB_R R3811 22 D3807 ...

Page 28: ...PHY_RDN EPHY_TDN C3901 0 1uF 16V EPHY_TDP 3 3V_Normal EPHY_LINK C3902 0 1uF 16V EPHY_RDP 2 5V_BCM35230 EPHY_ACTIVITY JK3901 XRJV 01V D12 180 1 2 3 4 5 6 7 8 D1 D2 D3 D4 9 D3906 5 5V ADLC 5S 03 015 D3901 5 5V ADLC 5S 03 015 D3902 5 5V ADLC 5S 03 015 D3905 5 5V ADLC 5S 03 015 D3903 5 5V ADLC 5S 03 015 D3904 5 5V ADLC 5S 03 015 L3901 MLB 201209 0120P N2 R3901 240 R3902 240 Ethernet Block BCM35230 50 ...

Page 29: ... 5 1V AV2_L_IN C4022 560pF 50V JK4001 PPJ238 01 5D GN2 O SPRING 6D GN2 E LUG 4D GN2 CONTACT 7E BL2 E LUG S 5E BL2 O SPRING 7F RD2 E LUG S 5F RD2 O SPRING_1 5G WH2 O SPRING 4H RD2 CONTACT 5H RD2 O SPRING_2 6H RD2 E LUG 6A YL1 E LUG 5A YL1 O SPRING 4A YL1 CONTACT 5B WH1 O SPRING 4C RD1 CONTACT 5C RD1 O SPRING 6C RD1 E LUG C4015 560pF 50V R4028 75 R4022 0 COMP1_Pr R4025 470K R4027 75 D4007 5 6V C4021...

Page 30: ..._USB_CTL1 R4102 2 7K D4101 5 6V CDS3C05HDMI1 C4101 10uF 10V 3 3V_Normal R4101 4 7K OPT L4101 MLB 201209 0120P N2 120 ohm D4102 5 6V CDS3C05HDMI1 SIDE_USB_DM SIDE_USB_DP SIDE_USB_OCD1 5V_USB P4101 3AU04S 305 ZC LG 1 2 3 4 5 IC4101 AP2191DSG 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC C4103 0 1uF 16V D4103 RCLAMP0502BA OPT C4102 100uF 16V D4101 D4102 DUAL COMPONENT 1ST EAH42720601 2ND EAH609...

Page 31: ...213 10K LVDS_SEL_LOW R4206 33 FRC2 TXC3P C4202 1000pF 50V TXD3P TXDCLKN TXC1P TXACLKP TXC4N TXCCLKP TXB3N TXD4N TXA2N TXB0P TXD1P C4203 0 1uF 50V TXA0N 3D_SYNC_RF TXB2N TXC1N TXB4P 3 3V_Normal TXC0P TXA4N TXB4N TXC2P PANEL_VCC P4201 FI RE51S HF J R1500 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 ...

Page 32: ...0120P N2 S 3 3V_TU 5V_Normal C4450 0 1uF S C4451 0 1uF S 3 3V_TU 1 8V_TU 3 3V_S2_LNB C4446 10uF 10V S IF_AGC IF_P RF_SWITCH_CTL IF_N R4447 0 S R4448 0 S L4409 BLM18PG121SN1D S C4454 10uF 16V OPT C4455 4700pF 50V OPT C4456 100uF 16V OPT L4401 MLB 201209 0120P N2 C4457 10uF 16V OPT C4421 62pF 50V Non_S C4422 62pF 50V Non_S C4458 20pF 50V Non_S C4459 20pF 50V Non_S L4410 1uH Non_S L4411 Non_S 270nH L...

Page 33: ... 2SC3052 Q4504 12V C4521 4700pF C4511 6800pF 50V C4518 0 1uF L4506 C4517 1000pF 50V D4508 5 6V OPT R4520 390 R4523 180 R4501 5 6K R4509 470K JK4501 PSC008 01 1 AUDIO_R_OUT 2 AUDIO_R_IN 3 AUDIO_L_OUT 4 AUDIO_GND 5 B_GND 6 AUDIO_L_IN 7 B_OUT 8 ID 9 G_GND 10 D2B_IN 11 G_OUT 12 D2B_OUT 13 R_GND 14 RGB_GND 15 R_OUT 16 RGB_IO 17 SYNC_GND1 18 SYNC_GND2 19 SYNC_OUT 20 SYNC_IN 21 COM_GND 22 AV_DET D4507 5 ...

Page 34: ...25 22000pF 50V C4631 390pF 50V R4612 12 AMP_MUTE 0 1uF C4608 16V R4605 3 3K 0 1uF C4621 50V D4602 100V 1N4148W OPT L4602 BLM18PG121SN1D C4605 1000pF 50V C4626 22000pF 50V R4604 100 0 1uF C4614 16V C4627 1uF 25V SCL3_3 3V 24V_AMP 0 1uF C4638 50V C4629 390pF 50V AUD_LRCH R4601 10K C4628 1uF 25V SPK_L C4617 22000pF 50V AMP_RESET_N R4608 12 D4603 100V 1N4148W OPT 3 5V_ST 0 1uF C4636 50V 0 1uF C4613 16...

Page 35: ...5 5 6V AMOTECH P4701 12507WR 15L IR_15PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 15 D4703 5 6V CDS3C05HDMI1 S T_SCL R4701 10K 1 R4704 100 R4703 100 D4706 5 6V CDS3C05HDMI1 LED_R BUZZ KEY1 EEPROM_SCL 3 3V_Normal R4710 100 R4711 100 C4703 0 1uF IR R4722 47K COMMERCIAL R4716 47K COMMERCIAL R4718 0 OPT 3 5V_ST 3 5V_ST Q4701 2SC3052 COMMERCIAL E B C R4720 10K COMMERCIAL_EU Q4703 2SC3052 COMMERCIAL_EU E B ...

Page 36: ...PECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC AV2_CVBS_DET 3D_GPIO_1 WIRELESS_DET DD_MREMOTE 3D_GPIO_0 3D_GPIO_2 M_REMOTE_RX WIFI_DP AV2_CVBS_IN RST_HUB SIDE_USB_CTL2 M_RFModule_RESET WIFI_DM M_REMOTE_TX SIDE_USB_OCD2 WIRELESS_PWR_EN 5V_HDMI_4 DC_MREMOTE 3D_SYNC L_VS BCM35230 LV7 EU 48 50 Copyright 2011 LG Electronics Inc All rights reserved LGE Internal Use...

Page 37: ... GASKET_5 0T MDS62110210 M3 1 GASKET_5 0T MDS62110210 M7 1 GASKET_5 0T MDS62110210 M6 1 GASKET_5 0T MDS62110210 M5 1 GASKET_5 0T MDS62110210 M8 1 GASKET_5 0T MDS62110210 M11 1 GASKET_5 0T MDS62110210 M10 1 GASKET_5 0T MDS62110210 M9 1 GASKET_5 0T MDS62110210 M12 1 GASKET_5 0T MDS62110206 M2 3 GASKET_6 5T MDS62110206 M4 3 GASKET_6 5T MDS62110206 M3 3 GASKET_6 5T MDS62110206 M8 3 GASKET_6 5T MDS6211...

Page 38: ......

Page 39: ...onics Inc No part of this publication may be reproduced or distributed in any form or by any means or stored in a database or retrieval system without prior written permission of the publisher Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ... 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 No response in remote controller key error recording error memory error 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 Bulleti...

Page 42: ...s 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 14 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 Speaker Ca...

Page 43: ...eplace 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 2 2010 12 14 Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...ain B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close Menu Setup Booster 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 A7 Standard Repair Process Establ...

Page 45: ...ifferent maker TV etc Change satellite setting match with installed ANT N Normal Picture Y Close N A7 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom 4 2011 01 24 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 solder...

Page 46: ...ce 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 A8 N Y End Replace module Request repair for external device cable Color error Check Test pattern A12 A10 A11 Standard Repair Process Established date Revised date 5 14 LCD TV Error symptom 5 2010 12 14 Copyright 2011 LG Electronics Inc All ...

Page 47: ...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 nor...

Page 48: ...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 7 14 LCD TV Error symptom 7 Stand By Red Operating white Close 2010 12 14 Copyright 2011 LG Electronics Inc All rights reserved Only for training and service pur...

Page 49: ... 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 Reserved Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF...

Page 50: ...epair 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 9 14 LCD TV Error symptom Standard Repair Process 9 2010 12 14 Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ... 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 Established...

Page 52: ...attery of R C Check Repair Cable connection Connector solder Normal operating Check B 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 11 14 LCD TV Error symptom 1...

Page 53: ...evice 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 12 2010 12 14 Copyright 2011 LG Electronics Inc All rights 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 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 E...

Page 55: ...ller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Adjust VCOM Established date Revised date 14 14 LCD TV Error symptom Standard Repair Process A28 14 2010 12 14 Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

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