LG 42LN57 Series Service Manual
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LG 42LN57 Series Service Manual

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See also: Owner's Manual
LED TV
SERVICE MANUAL
CHASSIS : LB33B
MODEL : 42LN57**
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67727020(1308-REV02)
North/Latin America
Europe/Africa
Asia/Oceania
42LN57**-T*
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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  • 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 : LB33B MODEL : 42LN57** 42LN57**-T* CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67727020(1308-REV02) Printed in Korea...
  • Page 2 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 12 BLOCK DIAGRAM ................. 19 EXPLODED VIEW .................. 20 SCHEMATIC CIRCUIT DIAGRAM .............. - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    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 4: Servicing Precautions

    - 4 - 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: Specification

    Support HDCP DVI Audio Audio Input Component SPDIF out SPDIF out For My Media(Movie/Photo/Music List) USB Input or For SVC - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Component Video Input

    HDTV 1080i 1920×1080 33.75 60.00 HDTV 1080i 1920×1080 33.72 59.94 HDTV 1080i 1920×1080 56.250 HDTV 1080p 1920×1080 67.5 HDTV 1080p - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Dtv Mode

    FHD only(Support to HDMI-PC) 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA) 1920 x 1080 @60Hz 67.5 WUXGA(Reduced Blanking) FHD only - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 Primary(HDTV 1080P) 56.25 148.5 Side-by-side(half) Secondary(HDTV 1080P) Top-and-Bottom Primary(HDTV 1080P) 67.43 / 67.5 59.94 / 60 148.35/148.50 Side-by-side(half) Secondary(HDTV 1080P) - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 (Photo : side by Side(half), Top & Bottom) 640*350 720*400 640*480 Others 2D to 3D 800*600 1152*864 1280*1024 (“*” 3D supported mode manually & automatically) - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Input Mode

    7.9. 3D Input mode Single Frame Frame Side by Side Top & Bottom Checker board 2D to 3D Sequential Packing iii. - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Adjustment Instruction

    Address at ‘in start’ menu mode. ▪ Play: Press Enter key ▪ Result: Ready, Test, OK or NG ▪ Printer Out (MAC Address Label) - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Equipment Setting

    3.5. WIFI MAC ADDRESS CHECK (1) Using RS232 Command H-freq(kHz) V-freq.(Hz) Transmission [A][I][][Set ID][][20][Cr] [O][K][X] or [NG] (2) Check the menu on in-start - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Manual Adjustment

    00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 ⓑ Serial No: Controlled on production line. ⓔ Checksum(LG TV): Changeable by total EDID data. ⓒ Month, Year: Controlled on production line: ex) Monthly : ‘01’...

  • Page 15: White Balance Adjustment

    00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 - CMD: Command - VAL: FOS Data value ⓔ Checksum(LG TV): Changeable by total EDID data. - CS: Checksum of sent data - A: Acknowledge ⓔ1...

  • Page 16: Color Temperature

    ∆uv Cool 0.269 0.273 13000 K 0.0000 Medium 0.285 0.293 9300 K 0.0000 Warm 0.313 0.329 6500 K 0.0000 - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 (2) When 3D OSD appear automatically, then select OK key. (3) Don't wear a 3D Glasses, check the picture like below. - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 (2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms (3) RGB PC: 1 KHz sine wave signal 0.7 Vrms - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Block Diagram

    BLOCK DIAGRAM - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 MID_MAIN_1 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 MID_MAIN_2 2011.12.19 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 MID_MAIN_3 2011.12.09 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR ONE SIDE Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 2011.11.25 MID_POWER ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 2012.02.22 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 HDMI 4 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 JACK HIGH / MID 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 IR / KEY 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 USB2_USB3 2012.7.11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 FILRE AND ELECTRICAL 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. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 LAN_VERTICAL 2012.03.08 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 2011.11.21 AMP_NEO ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 FILRE AND ELECTRICAL 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. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 2012.03.08 TUNER ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 2012.07.10 TUNER ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 LVDS_HIGH_MID 2011.08.11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 LOCAL DIMMING 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 2011.12.01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 2011.12.01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 11.09.29 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 FILRE AND ELECTRICAL 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. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 2013 LED/LCD TV Engineering guide < Applicable Model : Mid-end Platform > XXLA74*-T* XXLA69/66*-T* XXLA64/62*-T* XXLN61/57*-T* Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 1 / 88 Only for training and service purposes...
  • Page 47 Better reliability on common noise • No data skew and better EMI margin • Fewer lines than mini-LVDS • Slim PCB design Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 2 / 88 Only for training and service purposes...
  • Page 48 -Slim S-PCB design (14mm  10mm) helps slimmer TV - FHD 120Hz 10Bit : 594Mbps@36Lines → 1.65Gbps@12Lines - FHD 240Hz 10Bit : 594Mbps@72Lines → 1.25Gbps@32Lines Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 3 / 88...
  • Page 49 • Clock skew • Transmission Overhead Demerit • EMI due to clock lines : 4bit delimiter • Bandwidth limit Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 4 / 88 Only for training and service purposes...
  • Page 50 From Smart phone to TV Samrt phone close to NFC Tag Player choose From TV to Smart phone Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 5 / 88 Only for training and service purposes...
  • Page 51 Main processor, DDR Memory eMMC Memory Micom for Key/IR sensing WIFI/BT PMIC Key+IR Audio AMP Front Spk EPI Wafer Level shifter Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 6 / 88 Only for training and service purposes...
  • Page 52 Main processor, DDR Memory eMMC Memory WIFI/BT Micom for Key/IR sensing Key+IR Audio AMP Front Spk LVDS Wafer Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 7 / 88 Only for training and service purposes...
  • Page 53 Micom for Key/IR sensing WIFI/BT Audio AMP Key+IR LVDS Wafer Front Spk 60” : 51Pin, 41Pin 32/39/42/47/50/55” : 51Pin Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 8 / 88 Only for training and service purposes...
  • Page 54 SPDIF OUT OPTIC ASSY ETHERNET WIFI USB_WIFI #EPI & LVDS Diagram LOGO LIGHT Sub Micom I2C 3 (RENESAS R5F1000G) X_TAL 32.768KHz Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 I2C_SDA1 IC5800 22Ω 33Ω I2C_SCL1 NTP7513 (AMP) 2.7KΩ P7600 33Ω I2C_SDA6 Local dimming 33Ω 33Ω TUNER(D) I2C_SCL6 IC101 22Ω HDCP EEPROM Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 56: Power Block Diagram

    USB3(Max 1.2A) MTK (AVDD3V3) NTP_7400(PVDD1) MTK(AVDD3V3_MEMPLL) NTP_7400(PVDD2) MTK(AVDD3V3_LVDS) MTK(AVDD33_STB) AUDIO AMP USB1(DVR Max 1.5A) 5V USB 3A EARPHONE AMP EMMC(VCC) EMMC(VCCQ) TUNER(+3.3V_TU) Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Tuner Block Diagram

    [VALID] 18 [MCLK] 19 [D0-7] 20-27 [S2_RESET] 31 IF_P ADCINP_DEMOD [T/C_DIF[P]] 10 AM27 [ADCINP_DEMOD] Attenuator IF_N ADCINN_DEMOD [T/C_DIF[N]] 11 AN27 [ADCINN_DEMOD] IF_AGC Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 Jack Side SoC Side JK501 COMP1_Y/AV1_CVBS COMP1_Y/AV1_CVBS_SOC [CVBS2P] COMP1_Pb COMP1_Pb_SOC [PB0P] COMP1_Pr COMP1_Pb_SOC [PR0P] COMP1/AV1/DVI_L_IN COMP1/AV1/DVI_L_IN_SOC [AIN4_L_AADC] COMP1/AV1/DVI_R_IN COMP1/AV1/DVI_R_IN_SOC [AIN4_R_AADC] MTK A2 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 59: Audio Out Block Diagram

    WOOFER AMP_MUTE MTK A2 IC3000 MICOM SIDE_HP_MUTE IC6100 HP_L/ROUT_MAIN HP_L/ROUT_AMP [AL0_ADAC] HEAD PHONE TPA6138A2PWR [AR0_ADAC] HP AMP JK3700 SPDIF_OUT [ASPDIF0] JK3602 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 DDC_SDA_3_JACK SIL1292 TMDS Link 8bits TMDS Link or MHL Link HDMI3 5V_BUS 5V_MHL Q3001 HDMI_CEC MHL_DET X-tal RENESAS WOL_CTL 32.768kHz MICOM Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 VGH_EVEN/VGH_ODD VGH_F/VGH_R EPI Tx GCLK Block MCLK Z_Out VCOMRFB EPI CH4 +/- EPI CH5 +/- EPI CH6 +/- EPI_LOCK6 EPI_LOCK6_SOURCE GMA4/GMA5/GAM7/GMA12/GMA14/GMA15 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62 Negative Charge Pump Controller CTRLP Diode GAM4/5/7/12/14/15 6-Ch Gamma Buffer(DAC output) VCOM_P VCOM_N Vcom reference & gain VCOM_LOOP PMIC_RESET Reset PMIC TPS65178 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 [U1TX] Motion Remote M_RFModule_RESET [ADIN4_SRV] Receiver [OPCTRL49] [OPCTRL50] HDMI2 SOC_TX [U0TX] 4Pin debugging [U0RX] SOC_RX wafer HDMI3 MTK A2 RENESAS MICOM Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 Main / PSU 18Pin Main / LVDS Cable IR 8Pin Cable WiFi 6Pin + RF 8Pin Cable SPK Cable Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 19 / 88 Only for training and service purposes...
  • Page 65 Main / PSU 18Pin Main / LVDS Cable IR 8Pin Cable WiFi 6Pin + RF 8Pin Cable SPK Cable Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 20 / 88 Only for training and service purposes...
  • Page 66 Main / PSU 18Pin Main / LVDS Cable IR 8Pin Cable WiFi 6Pin + RF 8Pin Cable SPK Cable Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 21 / 88 Only for training and service purposes...
  • Page 67 Introductions of 13Y RF ass’y + Magic Remote control 1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List 5. Pairing/Un-pairing Method Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 22 / 88 Only for training and service purposes...
  • Page 68 • Motion Data : gyro, accelerometer  Voice Data Transmission • Period : 10msec • Voice sampling : 16khz 16bit Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 23 / 88 Only for training and service purposes...
  • Page 69 0x09 0x8009 AUTO_WAKEUP 0x800C VOICE_START 0x800A Logical VOICE_STOP 0x800D Buttons POINT_START 0x803E M4 Remote MR13 Remote POINT_STOP 0x803F Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 24 / 88 Only for training and service purposes...

  • Page 70: Power Management

    2.8V LDO AA x 2 Battery uP0108NEC5-28 TI TPS61097 uP0108NEC5-28 Connector SC70 SC70 SOT23-5 Bluetooth Receiver Bluetooth Remote control Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 25 / 88 Only for training and service purposes...

  • Page 71: Function List

    Battery Boost up Regulator LDO1 uP0108NEC5-28 RF, Gyro, Accelerometer Power Supply LDO2 uP0108NEC5-28 Audio Codec, Mic. Power Supply Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 26 / 88 Only for training and service purposes...
  • Page 72 5 sec. • After unpairing, LED should be blinked for 3sec. • The remote just becomes to IR mode. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 27 / 88 Only for training and service purposes...
  • Page 73 Introductions of 13Y WIFI built in ass’y 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 28 / 88 Only for training and service purposes...
  • Page 74 1.2V USB interface RX/TX Switch Antenna 2.4G/5G DM3030 DP, DN BCM43236B RX/TX Switch Antenna Crystal 2.4G/5G DM3030 20MHz Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 29 / 88 Only for training and service purposes...
  • Page 75 WIFI Built in ass’y Specification Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 30 / 88 Only for training and service purposes...
  • Page 76 Widevine & HDCP 2.0 & NETFLX Contents 표지 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 31 / 88 Only for training and service purposes...
  • Page 77 (Because operation unique key should be downloaded for Widevine , Widevine key dowmload by NSU is impossible.) [Widevine Key] Widevine Key is unique data stored TV for using Widevine. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 32 / 88 Only for training and service purposes...
  • Page 78  Netflix  the services maintain a huge selection of movies and latest releases and offer DVD rentals via mail & online streaming. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 33 / 88 Only for training and service purposes...
  • Page 79 •Exchage Key which is used to set up and protect content streams. •Content Key which is used to encrpt the content being exchanged. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 34 / 88...
  • Page 80 Changed Item : Separate HDCP check box. - HDCP 2.0 Tx - HDCP 2.0 Rx - HDCP 1.4 Rx Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 35 / 88 Only for training and service purposes...
  • Page 81 G. Network error Connection defect / Network speed low First of all, Check whether there is SVC Bulletin in GCSC System for these model. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 36 / 88...
  • Page 82 Other : PSU Inverter/ Module Exchange Module itself (1) A-4/5 Exchange Module itself (2) A-5/5 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 37 / 88 Continue to the next page Only for training and service purposes...
  • Page 83 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 38 / 88 Only for training and service purposes...
  • Page 84 No Video/ replace voltage? No audio ( 3.5V,12V,20V or 24V…) MAIN B/D Replace Power Board and repair parts Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 39 / 88 Only for training and service purposes...
  • Page 85 Contact with signal distributor Normal Tuner soldering Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 40 / 88 Only for training and service purposes...
  • Page 86 Normal (match with installed ANT) or broadcaster Picture? (Cable or Air) Normal Picture? Close Close Close Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 41 / 88 Only for training and service purposes...
  • Page 87 Check external RGB/ External device device and Replace Main B/D HDMI/DVI /Cable cable error normal Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 42 / 88 Only for training and service purposes...
  • Page 88 Main B/D External Input, Component, normal? HDMI/ RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 43 / 88 Only for training and service purposes...

  • Page 89: Power Error

    ※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 44 / 88 Only for training and service purposes...
  • Page 90 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 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 45 / 88 Only for training and service purposes...
  • Page 91 Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 46 / 88 Only for training and service purposes...
  • Page 92 Connect and check Normal Check and fix other external device audio? external device Check and fix external device Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 47 / 88 Only for training and service purposes...
  • Page 93 Normal Close If R/C operate, operating? Explain the customer cause is interference from light in room. Replace R/C Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 48 / 88 Only for training and service purposes...

  • Page 94: Function Error

    Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 49 / 88 Only for training and service purposes...
  • Page 95 “Part related to nose” in the Owner’s Manual. (For models without any fix information, provide the description) Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 50 / 88 Only for training and service purposes...
  • Page 96 ☞A28 Cabinet Replace cabinet damage Remote Replace remote controller controller damage Stand Replace stand dent Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 51 / 88 Only for training and service purposes...

  • Page 97: Network Error

    (match with AP and ether setting) (WiFi = AP) Picture? (Wired = ethernet port) Normal Picture? Close Close Close Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 52 / 88 Only for training and service purposes...
  • Page 98 TV that is supported CI+ 1.3 Old version of CI+ 1.2 CAM  Check SVC Bulletin Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 53 / 88 Only for training and service purposes...
  • Page 99 D. Function error_ No response in Remote controller operation checking method remote controller, key error D. VCOM Adjustment Sequence of the Vcom adjustment Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 54 / 88 Only for training and service purposes...
  • Page 100 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. enter the value after replacing the MAIN BOARD. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 55 / 88...
  • Page 101 (Power Board ↔ Main Board) SMAW200-H24S Power on Inverter On/off 3.5V PWM Dim #1 3.5V PWM Dim #2 L/DIMO_VS L/DIM0_MOSI L/DIM0_SCLK Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 56 / 88 Only for training and service purposes...
  • Page 102 MENU  support  signal test  select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 57 / 88 Only for training and service purposes...
  • Page 103 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 58 / 88 Only for training and service purposes...
  • Page 104 LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 59 / 88 Only for training and service purposes...
  • Page 105 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only...
  • Page 106 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!) Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 61 / 88 Only for training and service purposes...
  • Page 107 Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 62 / 88 Only for training and service purposes...
  • Page 108 Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 63 / 88 Only for training and service purposes...
  • Page 109 Appendix : Exchange LPB(LED driver) No Light Dim Light Dim Light Dim Light Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 64 / 88 Only for training and service purposes...
  • Page 110 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 65 / 88 Only for training and service purposes...
  • Page 111 Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 66 / 88 Only for training and service purposes...
  • Page 112 Front LOGO LED control in the status of Power On Condition: Menu  Option  LG Logo Light  Duration(off, off after10min) LOGO LED Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 67 / 88 Only for training and service purposes...
  • Page 113 (Power Board ↔ Main Board) SMAW200-H24S Power on Inverter On/off 3.5V PWM Dim #1 3.5V PWM Dim #2 L/DIMO_VS L/DIM0_MOSI L/DIM0_SCLK Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 68 / 88 Only for training and service purposes...
  • Page 114 (Power Board ↔ Main Board) SMAW200-H24S Power on Inverter On/off 3.5V PWM Dim #1 3.5V PWM Dim #2 L/DIMO_VS L/DIM0_MOSI L/DIM0_SCLK Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 69 / 88 Only for training and service purposes...
  • Page 115 Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 70 / 88 Only for training and service purposes...

  • Page 116: Checking Method

    1. Press the MENU button on the remote controller 2. Select the SOUND function of the Menu 3. Change TV Sound Out to TV Speaker Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 71 / 88...
  • Page 117 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. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only...
  • Page 118 When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only...

  • Page 119: Vcom Adjustment

    ■ Push the OK key to store the value. Then the message “Saving OK” is pop. ■ Press the exit key to finish V-COM adjustment. Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only 74 / 88...

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