LG 55UF6790 Service Manual

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LED TV

SERVICE MANUAL

CHASSIS : LA5ZR

MODEL : 55UF6790

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL69322917 (1506-REV00)

North/Latin America

Europe/Africa

Asia/Oceania

55UF6790-UB

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

Printed in Korea

Table of Contents

Summary of Contents for LG 55UF6790

Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LA5ZR MODEL : 55UF6790 55UF6790-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69322917 (1506-REV00) Printed in Korea...
Page 2 ADJUSTMENT INSTRUCTION ..............9 BLOCK DIAGRAM ................. 21 EXPLODED VIEW .................. 30 SCHEMATIC CIRCUIT DIAGRAM ........... APPENDIX TROUBLESHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 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. - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 6 Rear (1EA), USB Input(3EA) EMF, DivX HD, For SVC (download) Side JPEG, MP3, DivX HD Support USB3.0 only USB1 - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 297.00 Only UD Model 3840*2160 297.00 Only UD Model 4096*2160 53.95 23.97 Only UD Model 4096*2160 Only UD Model - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 61.43 29.97 296.703 UDTV 2160P 4096*2160 67.5 UDTV 2160P 4096*2160 59.94 UDTV 2160P(HDMI 1,2 only) 4096*2160 UDTV 2160P(HDMI 1,2only) - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 ▪ xb 00 06 [Change input source to RGB(1024*768)] ▪ ad 00 10 [Adjust 1920*1080 RGB] ▪ aa 00 90 End adj. - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 1) Play the LAN Port Test PROGRAM. 2) Input IP set up for an inspection to Test Program. *IP Number : 12.12.2.2. - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 C. 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 - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 Monthly : ‘01’ -> ‘01’ Year : ‘2015’ -> ‘19 ⓓ Model Name(Hex): LGTV ⓔ Checksum(LG TV): Changeable by total EDID data. ⓕ Vendor Specific(HDMI) 5.2.4.1. EDID # DTS HDMI1 (C/S: A0,F3)_6G_2D ONLY_UHD Deep Color ON 2) Select [Start] button by pressing Enter key, HDMI1 / HDMI2 / HDMI3 / HDMI4 are Writing and display OK or NG.
Page 13 # DTS HDMI1 (C/S: E6,80)_3G_2D ONLY_UHD Deep Color OFF # AC3 HDMI2 (C/S: A0,EC)_6G_2D ONLY_UHD Deep Color ON # DTS HDMI2 (C/S: E6,70)_3G_2D ONLY_UHD Deep Color OFF - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 # AC3 HDMI2 (C/S: A0,EC)_6G_2D ONLY_UHD Deep Color ON # PCM HDMI1 (C/S: A0,6E)_6G_2D ONLY_UHD Deep Color ON # AC3 HDMI1 (C/S: E6,89)_3G_2D ONLY_UHD Deep Color OFF - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 # PCM HDMI2 (C/S: E6,EB)_3G_2D ONLY_UHD Deep Color (3) RS-232C Command RS-232C COMMAND Explanation DATA Camera Function Start. Camera Function End. - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 16 RS -232C Pat t ern Generat o r Signal Source * If TV internal pattern is used, not needed - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 Over 120 * Use only AUO, INX, Sharp, CSOT, BOE (Cool temp Spec is 13000K) Cool Medium Warm spec target - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 - If OK, Good lamp will lit up and the stopper will allow the pallet to move on to next process. Tuner GND is separated. - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 20 (2) Select "Tool Option 1" and Push “OK” button. (3) Punch in the number. (Each model has their number.) - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 30 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 SPI_CK_SOC OLED LM14A+URSA9 COMPENSATION_DONE TXVBY1_0N SPI_DI_SOC LM14A UF68/64 FAN_ON +3.3V_NORMAL FRC_FLASH_SEL_SOC TXVBY1_0P CHIP CONFIG SPI_DO_SOC NVRAM +3.3V_NORMAL /TU_RESET2 TXVBY1_1N /SPI_CS FRC_FLASH_WP LM14A UF74 Rohm_NVRAM GST_A IC101-*1 BR24G256FJ-3 TXVBY1_1P ROHM Semiconductor KOREA CORPORATION EAN62389502 GCLK_A TXOSD_3P LOCKAn_OSD Atmel_NVRAM WOL_WAKE_UP_SOC IC101 PMIC_RESET TXOSD_3N URSA9_CONNECT MCLK_A...
Page 32 +1.1V_Bypass Cap(CLOSE TO CHIP SIDE) +1.1V_VDDC_CPU IC100 LGE5332(LM14A) 4th layer 1st layer +1.1V_VDDC DVDD_DDR11 +1.1V_VDDC +1.1V_VDDC 4th layer AC17 L226 VDDC_1 VDDC_24 PZ1608U121-2R0TF AC18 C263 C323 VDDC_2 VDDC_25 AC19 10uF C208 0.1uF VDDC_3 VDDC_26 10uF AC20 VDDC_4 VDDC_27 AC21 C257 C324 VDDC_5 VDDC_28...
Page 33 DDR_VTT DDR_VTT AR400 AR407 Hynix_DDR3_4Gb_29n M0_DDR_VREFDQ Hynix_DDR3_4Gb_29n M0_1_DDR_VREFDQ 1/16W 1/16W IC400 IC401 C424 0.1uF C453 0.1uF M0_DDR_A14 M1_DDR_A14 H5TQ4G63AFR-RDC H5TQ4G63AFR-RDC M0_DDR_A8 M1_DDR_A8 M0_DDR_A11 M1_DDR_A11 EAN63053201 EAN63053201 C425 0.1uF C454 0.1uF M0_DDR_A6 M1_DDR_A6 DDR3 DDR3 M0_DDR_A0 M0_DDR_A0 AR401 AR408 VREFCA VREFCA 4Gbit 4Gbit M0_DDR_A1...
Page 34 Clock for MSD808KWD COMPENSATION_DONE_1 OLED DPC_CTRL +3.3V_NORMAL MAIN Clock(24Mhz) Jtag I/F 12V_ON XIN_MAIN For Main C614 C600 0.1uF JTAG SW600 JS2235S P600 12505WS-10A00 JTAG TRST_N0 XOUT_MAIN TDI0 TDO0 C615 R602 R604 TDI0 TDO0 TDI0_1 TDO0_1 System Clock for Analog block(24Mhz) TMS0 R603 JTAG...
Page 35 IC100 LGE5332(LM14A) GND_1 GND_171 GND_2 GND_172 GND_3 GND_173 GND_4 GND_174 GND_5 GND_175 GND_6 GND_176 GND_7 GND_177 GND_8 GND_178 GND_9 GND_179 GND_10 GND_180 GND_11 GND_181 GND_12 GND_182 GND_13 GND_183 GND_14 GND_184 GND_15 GND_185 GND_16 GND_186 GND_17 GND_187 GND_18 GND_188 GND_19 GND_189 GND_20 GND_190 GND_21...
Page 36 +12V ’15 UHD 13V ONLY POWER PANEL_POWER +3.5V_ST Power_DET TYP 6000mA +12V R2327 PANEL_VCC +3.5V_ST 100K +12V L2311 R2306 UBW2012-121F R2332 RESET_IC_KEC(MULTI) RL_ON C2327 C2331 R2301 C2330 IC2306 10uF 0.1uF 0.01uF AOS_PANEL_POWER_FET IC2309 KIC7529M2 L2302 AO4447A Q2300 UBW2012-121F R2330 12P_POWER_WAFER POWER_DET MMBT3906(NXP) R2329...
Page 37 MAX 3A LM14A CPU LM14A CORE +1.1V_VDDC_CPU +12V L2502 PZ1608U121-2R0TF +1.1V_VDDC +12V Placed on SMD-TOP UF64/68 UF64/68 UF77 UF77 C2510-*1 C2512-*1 C2510 C2512 C2513 10uF 10uF 10uF 0.1uF 10uF IC2501 L2501 IC2502 C2514 L2500 BD86106EFJ TPS54427DDA [EP]GND EAN62653301 100pF PZ1608U121-2R0TF [EP] R2524 PGND...
Page 38 Renesas MICOM For Debug EPSON_MICOM_CRYSTAL(MAIN) C3002-*1 +3.5V_ST EAW30067102 18pF X3000-*1 EPSON_MICOM_CRYSTAL(MAIN) 32.768KHz C3003-*1 EPSON_MICOM_CRYSTAL(MAIN) 15pF Don’t remove R3016, MICOM_DEBUG not making float P40 P3000 12507WS-04L 12pF 12pF LOGO_LIGHT C3002 C3003 EAW58239602 MICOM_DEBUG X3000 MICOM_RESET 32.768KHz +3.5V_ST HDMI_WAUP:HDMI_INIT R3028 4.7M MHL_DET_LM15 R3037 MHL_DET_LM15 MICOM_RESET_SW...
Page 39 HDMI 3 INPUT (Rear Horizontal) Different from the sheet specification and description Sheet spec. and description : HDMI_Rear2_Side1 5V_HDMI_1 5V_DET_HDMI_1 5V_HDMI_3 5V_DET_HDMI_3 R3324 R3309 1.8K 1.8K R3316 R3302 R3336 R3319 R3337 R3305 4.7K 4.7K NON_HDMI_EXT_EDID Q3300 2N3904S HDMI_HPD_3 SHIELD R3318 Q3305 R3315 SHIELD...
Page 40 AV/COMPONENT REAR Place JACK Side 1608 sizs For EMI/ESD R3832 @netLa AV1_CVBS_IN C3822 C3805 C3806 VA3806 150pF 27pF 100pF C3811 COMP1_Y 47pF 5.5V R3831 HON_HAI_OPTIC_JACK(SUB) JK3800-*1 2F01TC1-CLM97-4F +3.3V_NORMAL PPJ245N2-01 PPJ245-31 SPDIF OUT JK3802-*1 JK3802 R3807 [RD2]E-LUG 6A [ GN/YL]E-LUG R3803 +3.3V_NORMAL 1608 sizs For EMI/ESD 5A [GN/YL]O-SPRING...
Page 41 C4111 C4112 0.1uF 0.1uF +3.5V_ST IC4101 AO-R123C7G-LG SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS UF64/6800 2015-01-21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Page 42 USB1 +5V_USB_3 MAX 1.0A R4300 USB_DM3 R4301 USB_DP3 C4322 C4323 22uF 10uF SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS UF64/6800 2015-01-21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Page 43 Ethernet Block C5000 C5001 0.1uF 0.01uF T-36TM9G_30150_02HF EAG35781015 EAG35781010 OLD_LAN_JACK NEW_LAN_JACK_3SIM NEW_LAN_JACK_ESD(1st) JK5000-*2 JK5000-*1 JK5000 36TM9G-30150-02HF BS-RV30330 RJ45VT-01SN002 U.D. ELECTRONIC CORP XML KOREA CO., LTD FREEPORT RESOURCES ENTERPRISES CORP. EPHY_TDP EPHY_TDN EPHY_RDP EPHY_RDN VA5000 VA5001 VA5002 VA5003 5.5V 5.5V 5.5V 5.5V LAN_ESD(MAIN) LAN_ESD(MAIN)
Page 44 AUDIO AMP(NTP7515) SM-6045-100 GET_AMP_COIL L5802-*1 10.0uH +3.3V_NORMAL R5805 AMP_RESET_N TAIYO_AMP_COIL NRS6045T100MMGK 1/16W L5802 R5806 C5806 L5801 10.0uH 1000pF 4.7K PZ1608U121-2R0TF SPK_L+ AUD_SCK +24V_AMP R5811 C5821 0.1uF C5805 4.7K C5813 0.1uF C5809 390pF 10uF C5819 0.47uF C5814 390pF C5822 R5812 SPEAKER_L 0.1uF TAIYO_AMP_COIL 4.7K...
Page 45 1. should be guarded by ground 2. No via on both of them 3. Signal Width >= 12mils close to Tuner Signal to Signal Width = 12mils +3.3V_TUNER Ground Width >= 24mils L6500 PZ1608U121-2R0TF close to TUNER +3.3V_LNA_TU C6501 0.1uF TU_K/M/W_TW/BR/CO R6507 1K TU_K/M/W_TW/BR/CO...
Page 46 TU_H_US TU_H_T2_KR TU_M_EU TU_H_BR TU6705 TU6701 TU6704 TU6702 TDJH-H301F TDJK-T301F TDJM-H401F TDJM-G301D +3.3V +3.3V +3.3V +3.3V +3.3V_LNA_TU NC_1 NC_1 NC_1 RF_SWITCH_CTL_TU DIF_AGC DIF_AGC NC_2 AIF_AGC IF_AGC_TU SCL_RF SCL_RF SCL_RF SCL_RF I2C_SCL5_TU SDA_RF SDA_RF SDA_RF SDA_RF I2C_SDA5_TU DIF[P] DIF[P] NC_3 AIF[P] IF_P_TU DIF[N] DIF[N]...
Page 47 +3.3V_NORMAL LOCKAn_HTPDAn_3.3VPullup LOCKAn_HTPDAn_3.3VPullup R7136 +1.8V R7132 LOCKAn LOCKAn_HTPDAn_3.3VPullup R7134 LOCKAn_HTPDAn_3.3VPullup Q7105 R7128 2N3904S [51P Vx1 KEC_LOCKAn_HTPDAn_3.3VPullup_TR HTPDAn_Video LOCKAn_HTPDAn_3.3VPullup output wafer] R7130 HTPDAn_OSD Q7103 Q7105-*1 R174 R173 2N3904S MMBT3904(NXP) LOCKAn_IN KEC_LOCKAn_HTPDAn_3.3VPullup_TR NXP_LOCKAn_HTPDAn_3.3VPullup_TR 51pin_Wafer P7100 SP14-11592-01-51Pin Q7103-*1 MMBT3904(NXP) NXP_LOCKAn_HTPDAn_3.3VPullup_TR *moved from SHT1. +3.3V_NORMAL TXDAP7_L TXDAN7_L...
Page 48 eMMC I/F 3.3v power delete, 131120 DVDD18_EMMC SAMSUNG ELECTRONIC CO.,LTD EAN63829501 IC8100 IC8100-*1 IC8100-*2 IC8100-*3 THGBMBG5D1KBAIL THGBMBG6D1KBAIL H26M41103HPR KLM4G1FEPD-B031 EMMC_DATA[0-7] AR8100 EMMC_DATA[0] 1/16W EMMC_DATA[1] DAT0 NC_23 DAT0 NC_23 DAT0 NC_22 EMMC_DATA[2] DAT6 DAT0 NC_22 DAT1 NC_24 DAT1 NC_24 DAT1 NC_23 DAT1 NC_23 EMMC_DATA[3]...
Page 49 LM14A+URSA11(UF68/64) CLIP Top Side for Covershield M13501 M13502 EAG64250901 EAG64250901 CLIP 1 - PUSH TYPE Heatsink guide cap C13500 C13501 22uF 22uF SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. LM14A 2015-01-23 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR CLIP&Vx1_CAP THE CRITICAL COMPONENTS IN THE...
Page 50 LM14A UF64/68 UF64/68 Error Pin TP - page 30. TUNER EMS GND SEPERATION Only 13V DET Delete WOL WIFI_EN POWER_DET_1 WOL/WIFI_POWER_ON WOL_WAKE_UP WOL_CTL TU_GND_A4_22nF TU_GND_B1_22nF C6700 C6703 TU_GND_A2_1nF TU_GND_A3_0ohm 0.022uF 0.022uF TU_GND_A1_0ohm TU_GND_A6_3.3nF TU_GND_B3_1nF TU_GND_B4_1nF C6706 R6700 630V TU_EU 630V C6710 R6701 C6707...
Page 51 IC12800 IC12800 LGE5352(URSA11) LGE5352(URSA11) PAD_RXCP_P0 PAD_RA0N PAD_RXCN_P0 PAD_RA0P PAD_RX0P_P0 PAD_RA1N PAD_RX0N_P0 PAD_RA1P PAD_RX1P_P0 PAD_RA2N PAD_RX1N_P0 PAD_RA2P PAD_RX2P_P0 PAD_RACKN PAD_RX2N_P0 PAD_RACKP PAD_A0P/VBY0- PAD_RA3N PAD_A0M/VBY0+ PAD_RA3P PAD_A1P/VBY1- PAD_RA4N PAD_A1M/VBY1+ PAD_RA4P PAD_A2P/VBY2- PAD_RXCP_P1 PAD_A2M/VBY2+ PAD_RXCN_P1 PAD_ACKP/VBY3- PAD_RX0P_P1 PAD_RB0N PAD_ACKM/VBY3+ AG10 0.1uF R12804 TXDAN0_L PAD_RX0N_P1 PAD_RB0P PAD_A3P/VBY4-...
Page 52 IC12800 LGE5352(URSA11) PAD_IO[78]/B-A0/[CD-A0] A_DDR3_A[0] PAD_IO[89]/B-A1/[CD-A1] A_DDR3_A[1] A_DDR3_A[2] PAD_IO[80]/B-A2/[CD-A2] PAD_IO[75]/B-A3/[CD-A3] A_DDR3_A[3] PAD_IO[86]/B-A4/[CD-A4] A_DDR3_A[4] A_DDR3_A[5] PAD_IO[74]/B-A5/[CD-A5] PAD_IO[96]/B-A6/[CD-A6] A_DDR3_A[6] PAD_IO[87]/B-A7/[CD-A7] A_DDR3_A[7] A_DDR3_A[8] PAD_IO[92]/B-A8/[CD-A8] PAD_IO[73]/B-A9/[CD-A9] A_DDR3_A[9] PAD_IO[90]/B-A10/[CD-A10] A_DDR3_A[10] A_DDR3_A[11] PAD_IO[83]/B-A11/[CD-A11] PAD_IO[84]/B-A12/[CD-A12] A_DDR3_A[12] PAD_IO[77]/B-A13/[CD-A13] A_DDR3_A[13] A_DDR3_A[14] PAD_IO[82]/B-A14/[CD-A14] PAD_IO[88]/B-A15/[CD-A15] A_DDR3_A[15] PAD_IO[85]/B-BA0/[CD-BA0] A_DDR3_BA[0] PAD_IO[93]/B-BA1/[CD-BA1] A_DDR3_BA[1] PAD_IO[81]/B-BA2/[CD-BA2] A_DDR3_BA[2] PAD_IO[97]/B-RASZ/[CD-RASZ] A_DDR3_RASZ PAD_IO[94]/B-CASZ/[CD-CASZ]...
Page 53 IC13200-*1 W25Q32FVSSIG +3.3V_NORMAL URSA_PQ_DEBUG WINBOND ELECTRONICS CORP. URSA11_SERIAL_FLASH_MEMORY_WINBOND(SUB) P13201 R13263 EAN62459301 12507WS-04L IC12800 URSA_PQ_DEBUG LGE5352(URSA11) SPI Flash DO[IO1] HOLD_OR_RESET[IO3] R13269 AD26 URSA_UART2_RX URSA_RESET PAD_RESET AD11 URSA_PQ_DEBUG PAD_I2C_HSC_SDA/[VSYNC_LIKE_SPI2] WP[IO2] AC10 XIN_URSA PAD_XOUT PAD_I2C_HSC_SCL/[VSYNC_LIKE_SPI3] URSA11_SERIAL_FLASH_MEMORY_MXIC(MAIN) XO_URSA PAD_XIN AC23 IC13200 DI[IO0] URSA_OPT_0 PAD_SPI1_CK/GPIO58 R13268 AD24 URSA_UART2_TX...
Page 54 MAX 4.7A +0.95V URSA11 Core +12V +1.5V URSA DDR +1.5V_U_DDR L13411 POWER_ON/OFF2_1 BLM18PG121SN1D R13404 UF77 C13443 C13617 10uF 0.1uF R13407 IC13403 R13424 BD9D321EFJ 1/16W [EP] UF64/68 C13617-*1 VID_CTRL 0.1uF C13403 1000pF 0.1uF C13447 R13421 R13422 BOOT 3.6K L13412 THERMAL 2.2uH VREG PGOOD +12V...
Page 55 VDDC VDDC IC12800 IC12800 VDDC LGE5352(URSA11) LGE5352(URSA11) C14800 C14821 C14832 C14852 C14856 C14858 C14863 C14868 C14872 C14876 C14878 VDDC_1 GND_1 GND_73 10uF VDDC_2 GND_2 GND_74 10uF 10uF 10uF 0.1uF 0.1uF 0.1uF 0.1uF 10uF 0.1uF VDDC_3 GND_3 GND_75 GND_199 VDDC_4 GND_4 GND_76 GND_200 VDDC_5...
Page 57: Lcd Tv
LCD TV Repair Guide `15 years New Models < Applicable Model > xxUF64, xxUF643, xxUF645, xxUF679, xxUF68, xxUF83 series LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 58 Memory URSA 11 Power Micom for Key/IR sensing From PSU Audio AMP Audio WiFi <SIZE: 174X285> Power On/Off key + IR LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 59 From PSU DDR Memory eMMC Memory URSA 11 Micom for Key/IR sensing Audio AMP Audio WiFi <SIZE: 174X206> Power On/Off key + IR LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 60 From PSU DDR Memory eMMC Memory URSA 11 Micom for Key/IR sensing Audio AMP Audio WiFi <SIZE: 174X206> Power On/Off key + IR LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 61 Main PCB T - CON IR Power On/Off Key ASSY WiFi Combo ASSY IR Jog Key ASSY WiFi Combo ASSY LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. To Main Only for training and service purposes...
Page 62 [PCBs] Main PCB T - CON IR Jog Key ASSY WiFi ASSY IR Jog Key ASSY WiFi Combo ASSY LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. To Main Only for training and service purposes...
Page 63 [PCBs] Main PCB T - CON IR Jog Key ASSY WiFi ASSY IR Jog Key ASSY WiFi Combo ASSY LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. To Main Only for training and service purposes...
Page 64 Circuit noise, mechanical noise F. Exterior error Exterior defect LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes First of all, Check whether there is SVC Bulletin in GCSC System for these model.
Page 65 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 66 Check and Normal voltages of Power No Video/ replace voltage? No audio Board ( 12V) MAIN B/D Replace Power Board and repair parts LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 67 2. Install Booster S/W Upgrade Contact with signal distributor Normal Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 68 Request repair for external device/cable Check external External device HDMI device and /Cable Replace Main/T-con B/D cable error normal LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 69 Screen (Check normal operation of normal? Main /T-con External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 70: Power Error
Measure voltage of each output of Power B/D Normal? ※ Normal Replace Main B/D voltage? Close Normal Check 12V(For STBY 3.3V) voltage? ☞A18 Replace Power B/D Replace Power LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 71 Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 72 Screen normal voltage Speaker off Board Cancel OFF Replace Power Board and repair parts Check Disconnection Replace MAIN Board Speaker disconnection Replace Speaker LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 73 Connect and check Normal External Input other external audio? signal error) device Check and fix external device Check and fix external device LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 74 (Power B/D don’t have problem) If R/C operate, Normal Close Explain the customer operating? cause is interference from light in room. Replace R/C LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 75 Down load the Firmware * If you conduct the loop at 3times, change the M4. * INSTART MENU14.RF Remocon Test3. Firmware download LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 76 Voltage? 1pin Main B/D Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value is “NG”? Close Change the Wifi assy LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 77 Check the Camera Ver. Reconnect the Normal Replace INSTART menu is “NULL”? operation? Camera module Main B/D Close Change the Camera module LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 78 - S/W Version HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 79 ※ Describe the basis of the description (For models without any fix information, in “Part related to nose” in the Owner’s provide the description) Manual. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 80 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 81 A-2/5 <Appendix> Defected Type caused by T-Con/ Exchange Power Board (PSU) A-3/5 Inverter/ Module Exchange Module (1) A-4/5 Exchange Module (2) A-5/5 LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 82: Check Power Input Voltage And St-By 3.5V
C. Audio error_ No audio/Normal video Voltage and speaker checking method when there is no audio E. Etc Tool option changing method LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 83 <xxUF64, xxUF643, xxUF645, xxUF68> After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 84 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. (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 85 <ALL MODELS>  Advanced Channels Channel Tuning Manual Tuning When the signal is strong, use the attenuator (-10dB, - 15dB, -20dB etc.) LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 86 Content date <ALL MODELS> 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 87 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. 3. If you can`t see the UHD live TV, please connect signal at left side of jack. (Korea model only) LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 88 LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 89 Content Check Link Cable(VX1) reconnection condition date <ALL MODELS> Check the contact condition of the Link Cable, especially dust or mis insertion. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 90 You can view 6 types of patterns 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!) LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 91 Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. A - 1/5 Only for training and service purposes...
Page 92 Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. A - 2/5 Only for training and service purposes...
Page 93 Appendix : Exchange Power Board (PSU) No Light Dim Light Dim Light Dim Light No picture/Sound Ok LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. A - 3/5 Only for training and service purposes...
Page 94 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. A - 4/5 Only for training and service purposes...
Page 95 Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. A - 5/5 Only for training and service purposes...
Page 96 LCD TV Revised Content Check front Power Indicator date <LM14A> ST-BY condition: On or Off Power ON condition: Turn Off LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 97: Table Of Contents
2 PWM_DIM2 3 GND 4 12V 5 12V 6 12V 7 12V 8 12V 9 GND 10 GND 11 INV_CTL 12 PWM_DIM1 LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 98: Established Date 2015.5.25
<ALL MODELS> Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 99 1. Press the Setting button on the remote controller 2. Select the Sound function of the Menu 3. Select the Sound Out 4. Select TV Speaker LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 100: 12V
3.Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal. LGE Internal Use Only Copyright 2015 LG Electronics Inc. All rights reserved. Only for training and service purposes...

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