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LG 55LA86 Series Service Manual
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LG 55LA86 Series Service Manual

LG 55LA86 Series Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : LD34D
MODEL: 55LA86**
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67733205 (1304-REV01)
North/Latin America
Europe/Africa
Asia/Oceania
55LA86**-Z*
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 55LA86 Series

  • 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 : LD34D MODEL: 55LA86** 55LA86**-Z* CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67733205 (1304-REV01) Printed in Korea...

  • Page 2: Table Of Contents

    SERVICING PRECAUTIONS ..............4 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 13 EXPLODED VIEW .................. 23 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

    96.5E/ HELLASAT2 39.0E/ HISPASAT1CDE 30.0W/ HOTBIRD 13.0E/ INTELSAT10&7 68.5E/ INTELSAT15 85.2E/ INTELSAT904 60.0E/ NILESAT 7.0W/ THOR 0.8W/ TURKSAT 42.0E/ YAMAL201 90.0E - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10 Input Voltage AC 100 ~ 240 V, 50/60 Hz - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 29.976 / 30.00 74.25 HDTV 1080P 1920*1080 56.250 148.5 HDTV 1080P 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 2D to 3D, Side by Side(Half), Top & Bottom, Checker Board, Single Frame Sequential, 1920*1080 56.250 148.5 HDTV 1080P Row Interleaving, Column Interleaving - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 Primary(HDTV 1080P) 56.250 148.5 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) - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 2D to 3D, Side by Side, Top & Bottom HDTV 1080P 1920*1080 33.71 29.97 74.176 2D to 3D, Side by Side, Top & Bottom HDTV 1080P - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Frame Line Column Side by Side Top & Bottom Checker board 2D to 3D Sequential Packing Interleaving Interleaving iii. - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Adjustment Instruction

    ▪ Printer Out (MAC Address Label) - Pattern : Horizontal 100% Color Bar Pattern - Pattern level : 0.7 ± 0.1 Vp-p - Image - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 * CAMERA need to be status of Slide up. 3) RS-232C Command RS-232C COMMAND Explanation DATA Camera Function Start. Camera Function End. - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 (2) Check the method of RS232C Command 1) Into the main ass’y mode(RS232: aa 00 00) CMD 1 CMD 2 Data 0 - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 MODEL NAME(HEX) adjustment) LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV) 4.1. EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download ⓔ Checksum(LG TV): Changeable by total EDID data.

  • Page 17: White Balance Adjustment

    1) Surrounding Temperature : 25 °C ± 5 °C 2) Warm-up time: About 5 Min 3) Surrounding Humidity : 20 % ~ 80 % - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Color Temperature

    ON, OFF. Default is inner(ON). By selecting OFF, Warm 0.310 0.325 6500 K 0.0000 you can adjust using RF signal in 206 Gray pattern. - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 (2) When 3D OSD appear automatically, then select OK key. Over 120 (3) Don't wear a 3D Glasses, check the picture like below. - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 → OK, Else → NG (2) After press LNB OFF key, ‘18 V LED’ and ‘22 KHz tone LED’ should be OFF. - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 (2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms (3) RGB PC: 1 KHz sine wave signal 0.7 Vrms <Slide Up Status> <Slide Down Status> - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 (2) Select "Tool Option 1" and push "OK" key. (3) Punch in the number. (Each model has their number) - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 23 - Copyright © 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. H13 D CHIP Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN POWER 11/05/31 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MAIN AUDIO/VIDEO 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 27 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN DDR Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 2012-10-20 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCIA Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 2012-12-07 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR POWER 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 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 31 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. HDMI Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 JACK HIGH/MID 2012.10.09 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 33 IR / KEY 2012.10.10 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 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 35 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR USB JACK 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 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART GENDER Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 LAN_VERTICAL 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 38 2012-09-12 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR ETHERNET 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 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR AUDIO[ST] 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 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR AUDIO[ST] 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 SCART AUDIO AMP 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 42 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 43 CI SLOT 2011.10.31 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 CI SLOT 2011.04.17 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 45 TUNER 2012.07.10 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 TU_SYMBOL 2012.09.14 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 47 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 48 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS INTERFACE Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 LOCAL DIMMING 2012.09.14 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 50 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 51 2012.09.14 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. EPI_CAP Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 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 54 2013 LED/LCD TV Engineering guide < Applicable Model : High-end Platform >...
  • Page 55 EPI Interface EPI(Embedded Point-Point Interface) TCON Features LOCK • Point-Point topology (support 2 Pair option) • CDR (Clock Data Recovery) • Bandwidth up to 1.85Gbps/pair at FHD 120Hz 10 bit application • Lock signal cascading and feedback to T-Con Figure1. Topology •...
  • Page 56 EPI Interface (mini-LVDS vs. EPI) Comparison What to change HF mini-LVDS LCM (T-con to S-Driver IC) FHD (10bit) HF mini-LVDS HF mini- LVDS 60Hz 120Hz 240Hz TCON No. of Signal 60pin 60pin 80pin Connector (2ea) (2ea) (2ea) -Difficult to upgrade bandwidth limit -Multiple number of wires needed for higher bandwidth (FHD 120Hz) EPI (Embedded clock P-to-P Interface)
  • Page 57 EPI Interface (mini-LVDS vs. EPI) HF mini-LVDS TCON TCON Lock Topology Protocol • Multi Drop • Point to Point Features • Data rate: 660Mbps • Data rate : 1.8Gbps @10bit, FHD120 • External clock • Embedded clock, Control • Fewer Lines : 12 •...
  • Page 58 NFC (Near field communication) Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimetres. Present and anticipated applications include contactless transactions, data exchange, and simplified setup of more complex communications such as Wi-Fi.
  • Page 59 Main PCB for Broadband Main + TCON all in one xxLA790V-Zx Chassis : LD34D PCB P/No : EAX65040103 Main processor, DDR Memory eMMC Memory Micom for Key/IR/Logo sensing To PSU PMIC Audio AMP EPI Wafer To module Level shifter WIFI/BT Front Spk Key+IR+Logo...
  • Page 60 Main PCB for Broadband Main + TCON all in one xxLA860V-Zx Chassis : LD34D To Camera PCB P/No : EAX65040103 Main processor, DDR Memory eMMC Memory Micom for Key/IR/Logo sensing To PSU PMIC Audio AMP EPI Wafer To module Level shifter USB 3.0 WIFI/BT Front Spk...
  • Page 61 Main PCB for Broadband Main + TCON all in one To LED Driver xxLA960V-Zx To Woofer To Camera Chassis : LD34D PCB P/No : EAX65040103 Main processor, DDR Memory eMMC Memory Micom for Key/IR/Logo sensing To PSU USB 3.0 Audio AMP LVDS Wafer To module WIFI/BT...
  • Page 62 1. H13 Block Diagram (External) PC_Audio_L/R PC_AUDIO M-Remote_Rx/Tx DAC_DATA Motion-R AV1_CVBS HSR_P/M AV1_Audio L/R AAD_DATA CVBS LG1154AN SPDIF BB_TP_DATA OPTIC Comp1 Y,Pb,Pr COMP1 SC_CVBS, RGB, Audio L/R LG1154D SCART DTV/MNT_LR/V_OUT H/P Audio L/R H/P AMP Line out Audio Tuner Woofer SPDIF_OUT_ARC HDMI1 HDMI...
  • Page 63 2. LG1154 I2C Map +3.3V_NOR +3.3V_TU [SCL] IC6900 33 Ω A8303SESTR-T [SCL] [SDA] 33 Ω 33 Ω IC5700 TAS5733 23 [SDA] AMP WOOFER 33Ω AR15 24 [SCL] I2C_SCL1 33 Ω [D_SCL] IC5600 I2C_SCL4 [SCL0/GPIO66] 22 Ω [SCL3] TAS5733 23 [SDA] I2C_SDA1 AP15 33Ω...
  • Page 64 3. Power Block Diagram MICOM IR Ass’y Logo Light Ass’y 3.5V Wi-Fi Ass’y Ethernet PHY H13-D (VDDC) 1.5V DDR DDR (VDD) DDR (VDDQ) H13-A (VDDC10) PANEL_VCC 1.0V Core H13-A (AVDD10) H13-A (XTAL) SCART AMP H13-D (VDDC11) 1.2V Core H13-D (AVDD11) H13-D (XTAL) H13-D (VDD25) H13-D (AVDD25)
  • Page 65 4. Tuner/CI Block Diagram TDSQ- +3.3V_D_Demod +3.3V_TU G651D +1.8_TU +1.23V_D_Demod [+3.3V_S2_DEMOD] 32 +3.3V_NORMAL [+3.3V_TUNER] 5 CI Slot [+.1.8V_TUNER] 7 3.3K Ω [+1.23V_S2_DEMOD] 30 PCM_5V_CTL +5V_CI_ON CI 5V LNB_TX [S2_F22_OUTPUT] 33 10 [TONECTRL] Power detect LNB_OUT [LNB] 36 2 [LNB] IC6900 [S2_SCL] 34 22 Ω...
  • Page 66 5. Video & Audio IN Jack Side SOC Side Phone JACK AV1_CVBS_IN AV1_CVBS_IN_SOC [CVBS_IN3] COMP1/AV1/DVI_L_IN AUAD_L/R_CH2_IN [AUAD_L/R_CH2_IN] FULL SCART (18P) SC_CVBS_IN SC_CVBS_IN_SOC [CVBS_IN2] SC_R COMP1_PR_IN_SOC SC_G COMP1_Y_IN_SOC SC_B COMP1_PB_IN_SOC [PR1/Y1/PB1/SOY1_IN] SC_CVBS_IN_SOY COMP1_Y_IN_SOC_SOY SC_FB SC_FB_SOC (LG1154AN) SC_ID SC_ID_SOC [SC1_SID] [SC1_FB] AUAD_L/R_CH3_IN SC_L/R_IN [AUAD_L/R_CH3_IN] COMP2_PB_IN_SOC...
  • Page 67 6. AUDIO OUT MICOM SCART Mute COMP1/AV1/DVI_L_IN CTRL [TR] [AUAD_L_CH2_IN] AZ4580MTR DTV/MNT_L/R_OUT AUDIO L/R OUT SCART_Lout/Rout [AUD_SCART_OUTL/OUTR] filter OP AMP SC_L/R_IN [AUAD_L_CH3_IN] [DACSCK] MAIN 4P wafer [DACLRCK] AUD_SCK/LRCK/LRCH [DACLRCH] [SCL0/SDA0] TAS5733 I2C_SCL1/SDA1 AMP_RESET_N LG1154 AMP_MUTE MICOM SIDE_HP_MUTE TUNER_SIF [AAD_ADC_SIF] TPA6138A2 HEADPHONE HP_L/ROUT_MAIN Headphone...
  • Page 68 7. HDMI HDMI_HPD_1 ~ 4 5V_HDMI_1 ~ 4 HDMI1 SPDIF_OUT_ARC CEC_REMOTE TMDS Link 8bits HDMI_HPD_1 HDMI_S/W_RESET DDC_I2C 2bits 5V_HDMI_1 HDMI_INT HDMI2 SPDIF_OUT_ARC HDMI Switch TMDS Link 8bits (IC3201 / SII9587CNUC) CEC_REMOTE H13D HDMI Out put 8bits (IC100 / LG1154D) HDMI_HPD_2 DDC_I2C 2bits 5V_HDMI_2 I2C_SCL/SDA 5 2bits...
  • Page 69 8. Panel Interface Block Diagram EPI 50P_LEFT TX0P/N (EPI CH1 ±) 32/31 (LVDS_51PIN Side) TX1P/N 28/27 (EPI CH2 ±) 24/23 TX2P/N (EPI CH3 ±) 10/9 VGL_FB 1~12 12/11 CTRLN VCOMLFB/RFB CTRLP VCC18 VCC18 VGH_FB PMIC V core V core IC7700 H_VDD H_VDD TPS65178RSLR...
  • Page 70 9. PMIC & Level Shift Bloc Diagram PANEL_VCC Boost Converter Buck 1 converter(VCC) Vcore Buck 2 converter(Vcore) HVdd Buck 3 converter(HVdd) Level Shift Buck 4 converter(VCC18) VCC18 TPS65198 Positive Charge Pump Controller CTRLN Diode Negative Charge Pump Controller CTRLP Diode GAM4/5/7/12/14/15 6-Ch Gamma Buffer(DAC output) VCOM_P...
  • Page 71 10. USB / WIFI / M-REMOTE / UART USB1(3.0) USB3_DM [USB3_DM0] +5V_USB_1 USB3_DP [USB3_DP0] USB3_RX0M [USB3_RX0M] USB3_RX0P [USB3_RX0P] [USB3_TX0M] USB3+TX0M [USB3_TX0P] USB3_TX0P /USB_OCD1 [HUB_PORT_OVER0] [HUB_VBUS_CTRL0] USB_CTL1 USB2 USB_DM2 +5V_USB_2 [USB2_1_DM0] USB_DP2 [USB2_1_DP0] /USB_OCD2 [GPIO93] [GPIO92] USB_CTL2 USB3 USB_DM3 +5V_USB_3 [USB2_2_DM0] USB_DP3 [USB2_2_DP0] /USB_OCD3...
  • Page 72 Interconnection - 1 47LA790V-ZA [PCBs] Main PCB Power Board Local key Assy RF Assy WIFI Assy [Cables] Main / LPB 24Pin + Local Dimming Cable Main / Module EPI Cable 50& 50Pin LED driver / PSU IR 8Pin Cable WiFi 6Pin + RF 8Pin Cable SPK Cable...
  • Page 73 Interconnection - 2 47LA790V-ZA [PCBs] IR Assy [Cables] IR to Local Key 3Pin Cable IR to Logo Assy 4Pin Cable...
  • Page 74 Interconnection - 1 55LA860V-ZA [PCBs] Main PCB Power Board Local key Assy RF Assy WIFI Assy Camera Assy [Cables] Main / LPB 24Pin + Local Dimming Cable Main / Module EPI Cable 50& 50Pin LED driver / PSU WiFi 6Pin + RF 8Pin Cable SPK Cable Camera Cable...
  • Page 75 Interconnection - 2 55LA860V-ZA [PCBs] IR Assy [Cables] IR to Local Key 3Pin Cable IR cable...
  • Page 76 Interconnection - 1 60LA860V-ZA [PCBs] Main PCB Power Board Local key Assy RF Assy WIFI Assy Camera Assy [Cables] Main / PSU 18Pin Main / T-con LVDS Cable 41& 51Pin LED driver 14 Pin cable WiFi 6Pin + RF 8Pin Cable SPK Cable Camera Cable Local Dimming cable...
  • Page 77 Interconnection - 2 60LA860V-ZA [PCBs] IR Assy LED Driver T-con [Cables] IR to Local Key 3Pin Cable IR 8 Pin Cable...
  • Page 78 Interconnection - 1 47LA960V-ZA [PCBs] Main PCB Power Board Local key Assy RF Assy WIFI Assy Camera Assy [Cables] Main / PSU 18Pin Main / T-con LVDS Cable 41& 51Pin LED driver 14 Pin Cable WiFi 6Pin + RF 8Pin Cable SPK Cable Camera Cable Local Dimming cable...
  • Page 79 Interconnection - 2 47LA960V-ZA [PCBs] IR Assy LED Driver T-con [Cables] IR 5 Pin + Local Key 3 Pin Cable Woofer Cable...
  • Page 80 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...
  • Page 81 1. System UART or USB RF Receiver Remote  Pairing Information Transmission (Send to TV after Paired) • Static Calibration Data (Bypass only) • Remote FW ver. (Save also in Receiver) • BD_ADDR (Save also in Receiver) • Pairing Information Transmission Sequence •...
  • Page 82 2. Remote Buttons (M4 vs. MR13P) RF Unpaired RF Paired IR continuous BUTTON ETC. POWER IR_CODE RF_CODE repeat POWER 0x08 NONE IR only BACK 0x28 0x8028 VOICE SMART BACK POWER SMART 0x7C 0x807C ↑ BACK HOME 0x07 0x8007 ← 0x06 0x8006 →...
  • Page 83 3. MR13P Block Diagram MPU-6150 IR Emitter1 I2C ch1 Antenna (Gyro+ACC) (Invensense) IR Emitter2 512Kb BCM20702M (Voice Scene IR) (Serial F/M) BCM20733M A2 (BROADCOM) (BROADCOM) Bluetooth 4.0 Bluetooth 3.0 Light Key Button Control ( 4 x 4 ) 512Kbit Voice (Serial Flash) Antenna Partron...
  • Page 84 4. Function list 주요 Item Manufacturer Function Voice Codec WM8950 Wolfson 16KHz Sampling of Audio data Voice MEMS Mic. SPU0414HR5H Knowles Sensing Voice Sensing angular velocity of X, Y, Z-axis Gyro Sensor Motion MPU-6150 Invensense Sensor Accelerometer Sensing device tilt (Pitch & Roll angle) RF Antenna SDBTPTR3015 Partron...
  • Page 85 5. RF Pairing / Un-pairing Method Method Description • When do pairing, the remote should make pairing request IR signal(0x75) to TV. • When TV receive the IR signal, it  Method1 should send "pairing request – If unpaired, just press "OK" button. packet"...
  • Page 86 Introductions of 13Y WIFI built in ass’y 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification...
  • Page 87 WIFI Built in ass’y feature Block diagram 3.3V DCDC 3.3V 1.2V Wafer DP, DN EUP3010 - Pin map 6pin 1.25mm 3.3V 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...
  • Page 88 WIFI Built in ass’y Specification...
  • Page 89 Contents of LCD TV Standard Repair Process Error symptom (High category) Error symptom (Mid category) Page Remarks No video/Normal audio No video/No audio Video error, video lag/stop, fail tunning 3, 4 A. Video error Color error Vertical/Horizontal bar, residual image, light spot, external device color error No power B.
  • Page 90 Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check LCD back light with naked eye LED driver B+ 24V measuring method A. Video error_ No video/Normal audio Check White Balance value Power Board voltage measuring method TUNER input signal strength checking method A.
  • Page 91 Standard Repair Process Established A. Video error 2012. 12 .06 Error date LCD TV symptom No video/ Normal audio Revised date First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 ☞A4 No video...
  • Page 92 Standard Repair Process Established A. Video error 2012. 12 .06 Error date LCD TV symptom No video/ No audio Revised date ☞A4 Check various voltages Check and of Power Board Normal No Video/ replace voltage? No audio ( 3.5V,12V,20V or 24V…) MAIN B/D Replace Power Board and repair...
  • Page 93 Standard Repair Process Established A. Picture Problem 2012. 12 .06 Error date LCD TV symptom Picture broken/ Freezing Revised date . By using Digital signal level meter ☞ A6 . By using Diagnostics menu on OSD ( Menu→ Set up→ Support → Signal Test ) Check RF Signal level - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)
  • Page 94 Standard Repair Process Established A. Picture Problem (DVB-S/S2) 2012. 12 .06 Error date LCD TV symptom Tuning fail, Picture broken/ Freezing Revised date Check RF signal cable (DVB satellite signal or not) ☞ A6 Check whether other equipments have problem or not. Check RF Signal level (By connecting RF Cable at other equipment) →...
  • Page 95 Standard Repair Process Established A. Video error 2012. 12 .06 Error date LCD TV symptom Color error Revised date ☞A8 ☞ A10/ A11 ※ Check and Check color by input replace Link -External Input Color Cable Color Color -COMPONENT Replace Main B/D Replace module error? (LVDS) and...
  • Page 96 Standard Repair Process Established A. Video error 2012. 12 .06 Error date LCD TV symptom Vertical / Horizontal bar, residual image, Revised date light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A8 ☞ A10/ A11 ☞...
  • Page 97 Standard Repair Process Established B. Power error 2012. 12 .06 Error date LCD TV symptom No power Revised date ☞A17 ☞A19 DC Power on Replace Check Power LED Normal Check Power by pressing Power Key Power On ‘”High” Power LED operation? On Remote control .
  • Page 98 Standard Repair Process Established B. Power error 2012. 12 .06 Error date LCD TV symptom Off when on, off while viewing, power auto on/off Revised date Check outlet ☞A22 Check A/C cord Check Power Off Replace Main B/D Error? Normal? Mode Abnormal Check for all 3- phase...
  • Page 99 Standard Repair Process Established C. Audio error 2012. 12 .06 Error date LCD TV symptom Revised date No audio/ Normal video ☞A24 ☞A25 Check user Check audio B+ 24V No audio Normal menu > of Power Board Screen normal voltage Speaker off Cancel OFF Replace Power Board and repair parts...
  • Page 100 Standard Repair Process Established C. Audio error 2012. 12 .06 Error date LCD TV symptom Wrecked audio/ discontinuation/noise Revised date → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A25 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and Noise for...
  • Page 101 Standard Repair Process Established D. General Function Problem 2012. 12 .06 Error date LCD TV symptom Remote control & Local switch checking Revised date 1. Remote control(R/C) operating error Replace Main B/D ☞A27 ☞A27 ☞A27 Check & Repair Check R/C itself Normal Normal Check B+ 3.5V...
  • Page 102 Standard Repair Process Established D. Function error 2012. 12 .06 Error date LCD TV symptom External device recognition error Revised date Check technical Check External Input and information Signal Technical input Replace Main B/D Component - Fix information input? information? signal Recognition error - S/W Version...
  • Page 103 Standard Repair Process Established E. Noise 2012. 12 .06 Error date LCD TV symptom Circuit noise, mechanical noise Revised date Replace PSU(with LED driver) Check location Identify Circuit of noise noise type noise Replace LED driver Check location of Mechanical noise noise ※...
  • Page 104 Standard Repair Process Established F. Exterior defect 2012. 12 .06 Error date LCD TV symptom Exterior defect Revised date Zoom part with Module Replace module Adjust VCOM exterior damage damage ☞A28 Cabinet Replace cabinet damage Remote Replace remote controller controller damage Stand Replace stand...
  • Page 105 Standard Repair Process Established G. Network Error 2012. 12 .06 Error date LCD TV symptom Exterior defect Revised date Check Wired ethernet cable connection Check whether AP has a probelm or not. Check Network status Setting  Network  Networ Status ☞...
  • Page 106 Standard Repair Process Established G. CI+ Competibility Error 2012. 12 .06 Error date LCD TV symptom Exterior defect Revised date Check defect CI slot pin Check it’s worked CI+ 1.2 or 1.3 Check CI CAM status Setting  Antenna  CI information Check status of CI+ Key in the Read Is there...
  • Page 107 Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page Error symptom Content Page Remarks Check front display LED Check power input Voltage & ST-BY 3.5V B. Power error_No power Checking method when power is ON POWER BOARD voltage measuring method B.
  • Page 108 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/Normal audio 2012. 12 .06 symptom date LCD TV Revised Content Check White Balance value date <ALL MODELS> Entry method 1. Press the ADJ button on the remote controller for adjustment. 2.
  • Page 109 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/ Audio 2012. 12 .06 symptom date LCD TV Revised Content Power Board voltage measuring method date Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) SMAW200-H24S Power on Inverter On/off...
  • Page 110 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2012. 12 .06 symptom date LCD TV Revised TUNER input signal strength checking method Content date <ALL MODELS> MENU  support  signal test  select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)
  • Page 111 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2012. 12 .06 symptom date LCD TV Revised LCD-TV Version checking method Content date <ALL MODELS> 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment...
  • Page 112 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, residual Established 2012. 12 .06 symptom date image, light spot LCD TV Revised Content LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal...
  • Page 113 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2012. 12 .06 symptom date LCD TV Revised TUNER checking part Content date <ALL MODELS> Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2.
  • Page 114 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2012. 12 .06 symptom date LCD TV Revised Adjustment Test pattern - ADJ Key Content date You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2.
  • Page 115 Appendix : Exchange EPI Cable or Main B/D (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack...
  • Page 116 Appendix : Exchange EPI Cable or Main B/D (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION...
  • Page 117 Appendix : Exchange LPB(LED driver) No Light Dim Light Dim Light Dim Light...
  • Page 118 Appendix : Exchange the Module (1) Panel Mura, Light leakage Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage...
  • Page 119 Appendix : Exchange the Module (2) Vertical Line Vertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Horizontal Block Horizontal line Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases...
  • Page 120 LCD TV Revised Content Check front display LED date You can set the LG Logo Light to on or off by selecting OPTION in the main menus. Front LOGO LED control in the status of ST-BY Condition: Menu  Option  LG Logo Light ...
  • Page 121 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2012. 12 .06 symptom date LCD TV Revised Content Check power input voltage and ST-BY 3.5V date For ’10 models, there is no voltage out for st-by purpose. When st-by, only 3.5V is normally on.
  • Page 122 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2012. 12 .06 symptom date LCD TV Revised Content Checking method when power is ON date Check “power on” pin is high 24 Pin (Power Board ↔ Main Board) SMAW200-H24S Power on Inverter On/off...
  • Page 123 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing 2012. 12 .06 symptom date LCD TV Revised Content POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote controller for adjustment 2.
  • Page 124 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2012. 12 .06 symptom date LCD TV Revised Content Checking method in menu when there is no audio date <ALL MODELS> Checking method 1. Press the MENU button on the remote controller 2.
  • Page 125 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2012. 12 .06 symptom date LCD TV Revised Voltage and speaker checking method Content date when there is no audio <ALL MODELS> 24 Pin (Power Board ↔ Main Board) ①...
  • Page 126 Standard Repair Process Detail Technical Manual Error D. Function error_ No response in remote controller, Established 2012. 12 .06 symptom key error date LCD TV Revised Content Remote controller operation checking method date <ALL MODELS> P4101 KEY1 KEY2 ③ +3.5V_ST LOGO/LED_R ④...
  • Page 127 Standard Repair Process Detail Technical Manual Error Established D. VCOM Adjustment 2012. 12 .06 symptom date LCD TV Revised Content Sequence of the Vcom adjustment date 1. Case ■ LCD module change ■ T-Con board change 2. Equipment ■ Service Remote controller 3.

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