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LG 55EA970T Service Manual
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LG 55EA970T Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : ET34D
MODEL : 55EA970T
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67853503 (1401-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
55EA970T-DA
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 55EA970T

  • 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 : ET34D MODEL : 55EA970T 55EA970T-DA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67853503 (1401-REV00) Printed in Korea...
  • Page 2 PRODUCT SAFETY ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 14 EXPLODED VIEW .................. 24 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 Humidity : 10 ~ 90% ALEF Temp. : 0 ~ 50 deg Humidity : 20 ~ 90% Input Voltage AC100 ~ 240V, 50/60Hz - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 1.06 B (10-bit) Except FHD 60Hz models 16.7 M (8-bit) Only FHD 60Hz models Surface Treatment Hard coating (2H), Anti-glare - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080P 1920*1080 26.97 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 UDTV 2160P 3840*2160 56.25 25.00 297.00 UDTV 2160P 3840*2160 61.43 29.970 297.00 UDTV 2160P 3840*2160 67.5 30.00 297.00 UDTV 2160P - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 Secondary(HDTV 1080P) Side-by-side(half) Secondary(HDTV 1080P) 56.25 148.5 Frame packing Secondary(HDTV 1080P) Line alternative (HDTV 1080P) 28.125 148.5 Side-by-side(Full) (HDTV 1080P) - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 5.2.4. RF Input(3D supported mode automatically) Signal 3D input proposed mode Frame Compatible Side by Side(Half), Top & Bottom - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Row Interleaving, Column Interleaving Others 2D to 3D, 640*350 Side by Side(half) 720*400 Top & Bottom 640*480 800*600 1152*864 - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 - Remark: 3D Input mode Side by Side Top & Bottom Checkerboard Single Frame Frame Packing Line Column Sequential Interleaving Interleaving LLLLL - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 14) Outgoing Condition Configuration 15) Sound spec 16) Factoring Option Data input 4.1.3. Inspection - In INSTART menu, check these keys. - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Before PCBA check, you have to change the Tool option and have to AC off/on (Plug out and in) (If missing this process, set can operate abnormally) - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 ● Caution : Don’t connect HDMI and RGB(D-SUB) cable when downloading the EDID. If the cables are connected, Downloading of edid could be failed - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 - The input methods are same as other chassis.(Use IN-START Key on the Adjust Remocon.) Refer to Job Expression of each main chassis ass’y (EBTxxxxxxxx) for Option value - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 “wb 00 ff”, and Adj. offset if need ※ Luminance min value is 150cd in the Cool/Medium/Warm mode( For LCD) - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 192 ) and change the others ( 50-79 R/G Gain ). 80-119 (3) Adjustment mode : mode – Cool Over 120 - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 If it doesn’t change the value, the sensor is also defected 31-35 one. You have to replace it. 36-40 41-50 51-80 81-119 Over 120 - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 2) Go to the menu ‘6.Model Number D/L’ like below photo. 3) Input the Factory model name or Serial number like photo. - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 (1) RF input: Mono, 1 KHz sine wave signal, 100% Modulation (2) CVBS, Component: 1 KHz sine wave signal 0.4Vrms (3) RGB PC: 1 KHz sine wave signal 0.7Vrms - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 ■ When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively. And then automatically turn off. (Must not AC power OFF during blinking) - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 24 - Copyright © 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. H13 D CHIP Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 2013.03.05 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER_BLOCK(OLED) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM (RENESAS) Copyright ⓒ 2013 LG Electronics. Inc. All right 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. HDMI Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 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 right 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 NON_EPI(OLED) THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 2013.02.25 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR IR/KEY_OLED THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right 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 USB_HUB THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 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 right 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 TI_AMP_FILM_SPK THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 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 right 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 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 right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 LVDS : Quad USB 3.0 USB1(USB3.0) USB 2 0 USB 2.0 USB2(USB2.0) USB 2.0 USB3(USB2.0) USB_CAM DDR3 DDR3 DDR3 DDR3 eMMC 4Gb×4 (1600) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 54 GPIOIx16 GPIOIx16 HDMI HDMI HDMI-Rx 1.4 SPLL DPLL (1-port PHY) DDR3 Controller DDR3 Controller 3D, ARC, 4kx2k DDR3 PHY DDR3 PHY Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 55 3. Data Path Diagram Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 56 TS2 Valid (47) STPI1 VAL/GPIO40 FE_DEMOD3_TS_CLK TS2_MCLK_(48) STPI1_CLK/GPIO42 FE_DEMOD3_TS_DATA[0] TS2_DATA_(49) STPI1_DATA/GPIO54 /S2_RESET SD_Reset_(31) GPIO9 LG1154D I2C_SCL4 SD_SCL_(34) SCL3 I2C SDA4 I2C_SDA4 SD_SDA_35) SDA3 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 57 STPI1 VAL/GPIO40 STPI1_VAL/GPIO40 FE_DEMOD3_TS_CLK TS2_MCLK_(48) STPI1_CLK/GPIO42 FE_DEMOD3_TS_DATA[0] TS2_DATA_(49) STPI1_DATA/GPIO54 /S2_RESET SD_Reset_(31) GPIO9 LG1154D I2C_SCL4 SD_SCL_(34) SCL3 I2C SDA4 I2C_SDA4 SD_SDA_35) SDA3 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 58 FE_DEMOD1_TS_ERROR TP_DVB_SOP SD_Sync FE_DEMOD1_TS_SYNC TP_DVB_VAL LG1154D LG1154D SD Valid SD_Valid FE DEMOD1 TS VAL FE_DEMOD1_TS_VAL TP_DVB_CLK FE_DEMOD1_TS_CLK SD_MCLK TP_DVB_DATA0 SD_D0 FE_DEMOD1_TS_DATA[0] Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 59 TP_DVB_DATA0 SIDE_HP_MUTE TUNER_SIF [AAD_ADC_SIF] TPA6138A2 HP_L/ROUT_MAIN Headphone [AUDA_OUTL] HEAD PHONE HEAD PHONE [PHY0 ARC OUT 0] [PHY0_ARC_OUT_0] [IEC958OUT] [IEC958OUT] SPDIF_OUT SPDIF_OUT_ARC Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 60 DDC_I2C 2bits MICOM (IC3000 / HDMI4 HDMI4 R5F100GEAFB) TMDS Link 8bits TMDS Link 8bits DDC_I2C 2bits CEC_REMOTE MHL_DET (IC3202 / TPS2554) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 61 (TX1 +/-) EPI0B +/- EPI1A +/ EPI1A +/- (TX2 +/ ) (TX2 +/-) (TX3 +/-) EPI1B +/- TERM1 +/- TERM2 +/- Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 62 M REMOTE CTS / RTS M_REMOTE_CTS / RTS [GPIO15 / GPIO18] Receiver M_REMOTE_RESET [GPIO13] [UART0_RXD] [UART0_TXD] SOC_TX SOC_RX SOC_TX SOC_RX MICOM 4Pin debugging Wafer P3800 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 63 33 Ω [SCL4] 33 Ω P4102 [SCL2/GPIO78] SII9587CNUC 12507WR-12L AJ33 I2C_SDA5 [CSDA] I2C_SDA3 HDMI_SW 33 Ω [SDA4] 33 Ω AR17 [SDA2/GPIO77] Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 64 100 Ω [P71/KR1/SI21/SDA21] EEPROM_SCL/SDA 100 Ω [P70/KR0/SCK21/SCL21] [P60/SCL0] MICOM MICOM IR 10Pin I2C3_SCL/SDA LG1154D LG1154D LG1154D LG1154D R5F100GEAFB R5F100GEAFB R5F100GEAFB R5F100GEAFB [P61/SDA0] Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 65 51P LVDS Connector 51P LVDS Connector [GPIO11] AG7 PCM_5V_CTL H32 [CAM_VCCEN_N/GPIO87] P7200 /FRC_FLASH_WP CAM_WAIT_N E33 [CAM_WAIT_N/GPIO84] FI-RE51S-HFK-A [GPIO126] Y7 CAM_REG_N D34 [CAM_REG_N/GPIO72] Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 66 INV CTL INV_CTL [P13/T D2/SO20] 19 [P13/TxD2/SO20] 19 USB Wi-FI 24P POWER WOL/WOW_POWER_ON 13 [P50/INTP1/SI11/SDA11] P4301 P2301 RL_ON [P140/PCLBUZ0/INTP6] 36 FW20020-24S Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 67 Repair guide Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 1 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 68 First of all, Check whether there is SVC Bulletin in GCSC System for these model. h th i SVC B ll ti i GCSC S t Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 2 / 97 Only for training and service purposes...
  • Page 69 Other : PSU Module Exchange Module itself (1) A-4/5 Exchange Module itself (2) A-5/5 Continue to the next page Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 3 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 70 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 right reserved. 4 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 71 ( 3.5V,12V,20V or 24V…) No audio No audio MAIN B/D MAIN B/D Replace Power Board and repair parts Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 5 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 72 Contact with signal distributor Normal Replace Picture? or broadcaster (Cable or Air) Main B/D Normal Picture? Close Close Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 6 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 73 B ll i ? Bulletin? S/W Upgrade Contact with signal distributor Normal or broadcaster Picture? (Cable or Air) Close Close Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 7 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 74 Check external RGB/ External device device and Replace Main B/D HDMI/DVI /Cable cable error normal Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 8 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 75 Main B/D External Input, Component, HDMI/ RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 9 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 76 ※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A12 Replace Power B/D Replace Power Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 10 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 77 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 right reserved. 11 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 78 Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Replace Speaker Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 12 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 79 Connect and check Normal Check and fix other external device audio? external device Check and fix external device Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 13 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 80 Normal Close operating? Explain the customer cause is interference cause is interference from light in room. Replace R/C Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 14 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 81 DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical h i l information Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 15 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 82 ※ Describe the basis of the description in (For models without any fix information, provide “Part related to nose” in the Owner’s the description) Manual. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 16 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 83 Replace module exterior damage damage Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 17 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 84 D. Function error_ No response in Remote controller operation checking method remote controller, key error Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 18 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 85 Check Back Light On with naked eye date date <ALL MODELS> Power On -> disjoint back case -> check lighting at any point Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 19 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 86 Measure LED+ applying to LED Back Light from Power Board. Output LED+ from Power Board -> supply to LED B/L. Check Pin contacting statement and connection statement. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 20 / 97 Only for training and service purposes...
  • Page 87 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. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 21 / 97 Only for training and service purposes...
  • Page 88 Power Board voltage measuring method date date Check the DC 24V 12V 3 5V Check the DC 24V, 12V, 3.5V. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 22 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 89 Content date date <ALL MODELS> MENU => CHANNEL => Manual Tuning => Check Signal Strength & Signal Quality Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 23 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 90 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 right reserved. 24 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 91 <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 25 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 92 Check and replace Link Cable(LVDS) and contact condition date date <ALL MODELS> 1. Check and replace LVDS Cable 2. Check LVDS connection condition Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 26 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 93 3 MODULE 3. MODULE error (ADD-BAR,SCAN BAR..) (ADD BAR SCAN BAR ) 4.Video error (Classification of MODULE or Main-B/D!) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 27 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 94 Solder defect, CNT Broken CNT B k T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 28 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 95 Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Solder defect, Short/Crack Noise GRADATION GRADATION Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 29 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 96 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light Dim Light Li ht No picture/Sound Ok Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 30 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 97 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 right reserved. 31 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 98 In this case please exchange the module. Horizontal Block Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 32 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 99 Check front display LED date date Front LED control : Menu Option Power Indicator Standby light ON ST-BY condition: Red Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 33 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 100 Revised Check power input voltage and ST-BY 3.5V Content date date Check the DC 20V/24V, 12V, 3.5V. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 34 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 101 Revised Content Checking method when power is ON date date Check “power on(Pin 1)” pin is high(about 3.3V) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 35 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 102 1. Press the IN-START button of the remote controller for adjustment controller for adjustment 2. Check the entry into adjustment item 3 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 36 / 97 Only for training and service purposes LGE Internal Use Only...
  • Page 103 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 37 / 97 Only for training and service purposes...
  • Page 104 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 right reserved. 38 / 97...
  • Page 105 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 right reserved. 39 / 97...

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