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LG 42lk530 Service Manual
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LG 42lk530 Service Manual

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Download this manual See also: Owner's Manual, Manual Del Usuario
LCD TV

SERVICE MANUAL

CHASSIS : LT03B
MODEL : 42LK530
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL66980414 (1101-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42LK530-UC
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 42lk530

  • Page 1: Service Manual

    Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LT03B MODEL : 42LK530 42LK530-UC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL66980414 (1101-REV00) Printed in Korea...
  • Page 2 CONTENTS ....................2 SAFETY PRECAUTIONS ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 10 EXPLODED VIEW .................. 19 SVC. SHEET ....................Copyright LG Electronics. Inc. All right reserved. - 2 - 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. Copyright LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 Temp : 0 ~ 40 deg Humidity : ~ 80 % Storage Environment Temp : -20 ~ 60 deg Humidity : -85 % Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 +0.03 42LK530-UC(LGD) GREEN BLUE WHITE 0.292 Color coordinate Typ. Typ. 47LK550-UA (47 CCFL) -0.03 +0.03 47LK530-UC GREEN BLUE WHITE 0.292 Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 - Cool (100), Medium (100), Warm (30) 6500K (2) Color temp UI setting 0.314 0.329 0.344 - Warm (W50), Medium (0), Cool (C50) Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 800*600 37.879 60.31 40.00 VESA(SVGA) 1024*768 48.363 60.00 65.00 VESA(XGA) 1360*768 47.712 60.015 85.50 VESA(WXGA) 1920*1080 66.587 59.934 138.50 WUXGA Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 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 Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Adjustment Instruction

    (especially where W/B scale is strong. Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 3) Play Test (F9) button and confirm OK Message. 1) US, Canada models (11Y LCD TV + MAC + Widevine + 4) remove LAN CABLE ESN Key) Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 60 | 3F 1F 52 10 00 0A 20 20 20 20 20 20 00 00 00 FC 70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 7F Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only...
  • Page 14 60 | 96 00 A0 5A 00 00 00 18 26 36 80 A0 70 38 1F 40 70 | 30 20 25 00 A0 5A 00 00 00 1A 00 00 00 00 00 48 Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only...

  • Page 15: White Balance Adjustment

    (1) RS-232C Command used during auto-adj. COOL 0.269±0.002 0.273±0.002 13000K 0.0000 MEDIUM 0.285±0.002 0.293±0.002 9300K 0.0000 WARM 0.313+0.002 0.329±0.002 6500K 0.0000 Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 25173 7366 42LK530-UC 32854 5256 5770 25173 7366 47LK530-UC 32856 5256 5770 25173 7366 55LK530-UC 32859 5258 5770 25173 5318 Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 • After final inspection, press In-Stop key of the Adj. R/C and check that the unit goes to Stand-by mode. Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 1. Push "IN-START" key in service remote controller. 2. Select "Tool Option 1" and Push “OK” button. 3. Punch in the number. (Each model has their number.) Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Strap Setting NAND FLASH MEMORY 8Gbit 16Gbit Boot ROM Device Select - (FA4,FAD7,FAD2,FAD1) +3.3V_Normal +3.3V_Normal +3.3V_Normal 0000: ST Micro M25P or compatible Serial Flash IC102-*1 0010: 8-bit 512Mbit 512B page SLC NAND Flash devices TH58DVG4S0ETA20 IC102 0100: 8-bit 128, 256Mbit 512B page SLC NAND Flash devices TC58DVG3S0ETA00 0110: 8-bit 1Gbit 2KB page SLC NAND Flash devices R113...
  • Page 21 C257 C264 C268 C250 4.7uF 0.1uF 4.7uF 0.1uF MODEL OPTION 4.7uF +3.3V_Normal USB_AVDD33 +3.3V_Normal HDMI_AVDD33 L212 L216 external NO_FRC internal LG FRC2 BLM18PG121SN1D BLM18PG121SN1D URSA5 C283 MODEL_OPT_0 C291 C293 0.1uF 4.7uF 0.1uF MODEL_OPT_1 HIGH IC101 +0.9V_CORE LGE35230(BCM35230KFSBG) MODEL_OPT_2 +3.3V_Normal VDAC_AVDD33...
  • Page 22 IC101 LGE35230(BCM35230KFSBG) C320 0.1uF DSUB_R+ C321 0.1uF INCM_R C327 0.1uF R311 DSUB_G+ C328 0.1uF INCM_G VI_R R317 VI_INCM_R VI_G VI_INCM_G C322 0.1uF DSUB_B+ VI_B C323 0.1uF INCM_B VI_INCM_B R312 DSUB_HSYNC HSYNC_IN DSUB_VSYNC VSYNC_IN C329 0.1uF COMP1_Y VI_Y1 VIDEO INCM C330 0.1uF COMP1_Pr VI_PR1...
  • Page 23 DUAL COMPONENT IC401,IC402 1ST : EAN61667501, 2ND : EAN61570701 IC401-*1 1ST : T-K4B2G1646B_HCK0, 2ND : T-H5TQ2G63BFR-PBC IC402-*1 DDR STRAP DDR_DQ[0] DDR_DQ[1] DDR_DQ[2] DDR_DQ[3] DDR_DQ[4] +1.5V_DDR +1.5V_DDR NFM18PS105R0J NFM18PS105R0J C410 C432 JEDEC Types : DDR_DQ[0:4] 6.3V 6.3V R401 R403 R405 R407 R409 4.7K 4.7K...
  • Page 24 NEC MICOM +3.5V_ST R641 C602 C603 MICOM_DOWNLOAD 13pF 13pF X601 For Debug 10MHz P601 +3.5V_ST 12505WS-12A00 X602 MICOM_RESET 32.768KHz NEC_ISP_Tx R642 +3.5V_ST 10Mhz Crystal 4.7M NEC_ISP_Rx OCD1A OCD1B +3.5V_ST JTP-1127WEM FLMD0 C608 0.1uF R606 C604 0.1uF R647 R607 +3.5V_ST NEC_ISP_Rx 1/16W R610 NEC_ISP_Tx...
  • Page 25 DUAL COMPONENT Q901,Q902,Q903 1ST : 0TRIY80001A 2ND : 0TR387500AA Q904,Q905,Q906 D903,D904 1ST : EAH42720601, 2ND : EAH60994401 D905,D906 +3.5V_ST IR & KEY IR_12P IR_15P R933 EEPROM_SCL P902 P901 R920 12507WR-12L 12507WR-15L R919 D905 CDS3C05HDMI1 5.6V EEPROM_SCL R915 +3.5V_ST KEY1 R934 EEPROM_SDA EEPROM_SDA R916...
  • Page 26 WIRELESS READY MODEL DUAL COMPONENT D1001,D1002 1ST : EAH42720601 2ND : EAH60994401 Q1001 1ST : EBK61012601, 2ND : 0TRDI80002A Q1002 1ST : EBK60752501, 2ND : EBK61011501 JK1001 KJA-PH-3-0168 Wireless power WIRELESS VCC(24V/20V/17V)_1 VCC(24V/20V/17V)_2 VCC(24V/20V/17V)_3 VCC(24V/20V/17V)_4 VCC(24V/20V/17V)_1 +24V VCC(24V/20V/17V)_1 DETECT +3.3V_Normal INTERRUPT R1002 C1002...
  • Page 27 CVBS 1 PHONE JACK CVBS2 REAR JACK +3.3V_Normal R1141 R1112 AV2_R_IN 2.7K R1113 D1109 C1118 R1116 AMOTECH C1123 5.6V 470K 560pF AV1_CVBS_DET 560pF D1105 R1142 5.6V AV2_L_IN JK1102 D1110 KJA-PH-1-0177 C1119 AMOTECH R1117 C1124 5.6V M5_GND 470K 560pF 560pF JK1104 R1136 PPJ233-01 AV1_CVBS_IN...
  • Page 28 4.7K MLB-201209-0120P-N2 OUT_2 2 IN_1 120-ohm OUT_1 3 IN_2 C1220 C1224 4 EN C1231 10uF R1223 0.1uF 100uF 2.7K EAN61849601 USB_CTL1 3AU04S-305-ZC-(LG) JK1201 /USB_OCD1 NON_WIFI R1230 SIDE_USB_CTL1 R1231 SIDE_USB_OCD1 NON_WIFI USB_DM1 USB_DP1 WIFI R1205 NON_WIFI R1224 D1203 D1205 SIDE_USB_DM CDS3C05HDMI1...
  • Page 29 FHD120Hz LVDS output(51pin+41Pin) P1501 P1502 FI-RE51S-HFK-A FI-RE41S-HFK-A LVDS_41P REVERSE MARK LVDS_41P FRC2 LVDS_SEL R1504 3D_SYNC_RF C1504 2.2uF +3.3V_Normal FRC2 R1506 SDA2_3.3V FRC2 R1507 SCL2_3.3V R1513 FRC2 R1508 FRC_RESET 3.3K LVDS_SEL_HIGH R1514 LVDS_SEL_LOW SHARP_60INCH R1516 PANEL_CTL TXC0N TXC0P TXA0N TXC1N TXA0P TXC1P TXA1N TXC2N...
  • Page 30 [Local Dimming Block] P1601 12507WR-08L L/DIM0_SCLK L/DIM0_MOSI R1601 SCL2_3.3V R1602 SDA2_3.3V L/DIM0_VS SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS BCM35230 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR L_DIMMING THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
  • Page 31 NON CI PCM_MDI[0-7] /CI_CE1 PCM_MDI[0] PCM_MISTRT PCM_MDI[1] /CI_CE2 PCM_MIVAL_ERR PCM_MDI[2] PCM_5V_CTL PCM_MCLKI PCM_MDI[3] PCM_MDI[4] PCM_MDI[5] /PCM_WAIT PCM_MDI[6] CI_DET PCM_MDI[7] /PCM_IRQA PCM_RST PCM_TS_DATA[0-7] PCM_TS_DATA[0] PCM_TS_CLK PCM_TS_DATA[1] PCM_TS_VAL PCM_TS_DATA[2] PCM_TS_SYNC PCM_TS_DATA[3] PCM_TS_DATA[4] PCM_TS_DATA[5] PCM_TS_DATA[6] PCM_TS_DATA[7] CI_ADDR[2-14] CI_ADDR[2] CI_ADDR[3] CI_ADDR[4] CI_ADDR[5] CI_ADDR[6] CI_ADDR[7] CI_ADDR[8] CI_ADDR[9] CI_ADDR[10]...
  • Page 32 Non_DVB-S2 LNB Part_Allegro LNB_INT SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS BCM35230 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
  • Page 33 3D_SYNC L_VS SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. BCM35230 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR NON URSA THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
  • Page 34 DUAL COMPONENT 5V_HDMI_1 1ST : T-BAT54_SUZHO, 2ND : 0DSON00138A HDMI_HPD_1 D3716 C3726 BODY_SHIELD 0.1uF VR3701 R3706 IC3702 1ST : EAN60991801, 2ND : T-AZ1117BH_1.8, 3RD : EAN54428201 HOT_PLUG_DETECT VDD[+5V] R3736 DDC_SDA_1 DDC/CEC_GND * HDMI CEC R3737 VR3702 DDC_SCL_1 3.6K HDMI_ARC RESERVED R3707 CEC_REMOTE C3701...
  • Page 35 RGB/ PC AUDIO/ SPDIF/ EARPHONE/ RS232C DUAL COMPONENT +5V_Normal RGB PC D3810 D3804,D3805,D3806 KDS184 D3807,D3808,D3813 1ST : EAH39491601, 2ND : EAH33945901 D3814 1ST : 0DD184009AA, 2ND : 0DSIH00028A D3810 JK3803 +3.3V_Normal KJA-PH-0-0177 Q3801 1ST : 0TRIY80001A, 2ND : 0TR387500AA +5V_Normal IC3801 74F08D R3816...
  • Page 36 Ethernet Block +2.5V_BCM35230 L3901 CIC21J501NE JK3901 XRJV-01V-D12-180 EPHY_TDP D3906 ADLC 5S 03 015 C3901 0.1uF 5.5V EPHY_TDN EPHY_RDP D3902 D3905 ADLC 5S 03 015 ADLC 5S 03 015 5.5V 5.5V C3902 0.1uF EPHY_RDN D3901 ADLC 5S 03 015 5.5V +3.3V_Normal R3901 EPHY_LINK D3903...
  • Page 37 +3.3V_Normal +3.3V_AU_AVDD Place at Bottom This parts are Located L4905 TAS5727 on AVSS area. 120-ohm +3.3V_DVDD L4906 C4920 120-ohm 0.033uF +24V_AMP C4913 4700pF C4911 R4917 DUAL COMPONENT +24V_AMP +24V 0.047uF VERY CLOSE AMP IC C4926 Q4901 1ST : 0TRIY80001A 2ND : 0TR387500AA 10uF C4927 L4907...
  • Page 38 NON SCART NON CHINA HOTEL 5V_HDMI_4 SC_CVBS_IN SPK_R+_HOTEL SPK_R-_HOTEL DTV_ATV_SELECT DTV/MNT_V_OUT SDA3_3.3V SC_FB CHB_RESET CHBO_TS_VAL_ERR SCL3_3.3V SC_ID CHBO_TS_CLK SC_RE1 CHBO_TS_SERIAL SC_RE2 TU_RESET_SUB CHBO_TS_SYNC 3D_SYNC_RF 3D_GPIO_2 3D_GPIO_1 M_RFModule_RESET SCART_MUTE 3D_GPIO_0 TW9910_RESET M_REMOTE_RX M_REMOTE_TX SCART1_Lout_N DC_MREMOTE SCART1_Lout_P DD_MREMOTE SCART1_Rout_N 3D_SYNC SPK_R+_HOTEL SCART1_Rout_P AV2_CVBS_DET SPK_R-_HOTEL INCM_VID_SC...
  • Page 39 H/NIM (KOR/USA) DUAL COMPONENT +3.3V_S_TU IC5103 +5V_Normal +5V_TU 1ST : EAN54428101, 2ND : 0IPMG00048A +3.3V_DE +3.3V_TU L5103 L5101 L5105 BLM18PG121SN1D BLM18PG121SN1D R5104 MLB-201209-0120P-N2 100K R5103 C5116 C5128 C5129 RF_SWITCH_CTL_2 C5122 C5124 C5120 C5132 10uF 0.1uF 0.1uF 0.1uF 22uF 0.1uF 22uF C5126 0.1uF NON_CHB_TUNER_V...
  • Page 40 M1-*3 M1-*2 M1-*1 MDS62110206 MDS62110208 MDS62110210 MDS62110204 GASKET_6.5T GASKET_5.0T GASKET_4.5T GASKET_5.5T M2-*2 M2-*1 M2-*3 MDS62110208 MDS62110206 MDS62110210 MDS62110204 GASKET_4.5T GASKET_6.5T GASKET_5.0T GASKET_5.5T M3-*3 M3-*1 M3-*2 MDS62110206 MDS62110208 MDS62110210 MDS62110204 GASKET_6.5T GASKET_4.5T GASKET_5.0T GASKET_5.5T M4-*2 M4-*1 M4-*3 MDS62110208 MDS62110206 MDS62110210 MDS62110204 GASKET_4.5T GASKET_6.5T GASKET_5.0T...
  • Page 41 DUAL COMPONENT +12V PANEL_POWER FROM LIPS & POWER B/D Q501,Q504, 1ST : 0TRIY80001A 2ND : 0TR387500AA L511 TYP 1450mA Q505,Q506 12V_PANEL +3.5V_ST RT1P141C-T112 MLB-201209-0120P-N2 1ST : 0TRIH80004A, 2ND : EBK61012501, 3RD : 0TR102009AM Q502 Q502 PANEL_VCC C551 Q507 C550 1ST : EBK60752501, 2ND : EBK61011501 0.1uF R508 0.01uF...
  • Page 42 M13-*3 M13-*2 M13-*1 MDS62110206 MDS62110208 MDS62110210 MDS62110204 GASKET_6.5T GASKET_5.0T GASKET_4.5T GASKET_5.5T M14-*2 M14-*1 M14-*3 MDS62110208 MDS62110206 MDS62110210 MDS62110204 GASKET_4.5T GASKET_6.5T GASKET_5.0T GASKET_5.5T M15-*3 M15-*1 M15-*2 MDS62110206 MDS62110208 MDS62110210 MDS62110204 GASKET_6.5T GASKET_4.5T GASKET_5.0T GASKET_5.5T M16-*2 M16-*1 M16-*3 MDS62110208 MDS62110206 MDS62110210 MDS62110204 GASKET_4.5T GASKET_6.5T GASKET_5.0T...
  • Page 44 Applied chassis & models Chassis: LA12B Models : 42/47LK550-UA 42/47/55LK530-UC 2010. 12. 27. LCD TV Division LCD TV Lab. / AT Gr. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 45 REAR at REAR CVBS, L/R SCL, SDA_3.3V MICOM (NEC) Y Pb Pr, L/R Component 2 54MHz X-tal RX/TX RS-232C (Ctrl./SVC) MAX3232CDR Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 46 D-sub RGB VI_B H_sync(DSUB_HSYNC) HSYNC_IN V_sync(DSUB_VSYNC) VSYNC_IN * Each of analog audio signals shall be designed with “Common Mode (INCM) signal ” Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 47 ADAC_AR_P PC_L_IN AADC_LINE_L1 RGB-PC Audio AADC_LINE_R1 PC_R_IN * Each of analog signals shall be designed with “Common Mode (INCM) signal ” Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 48 10-bit (R) • LVDS_SEL : “H”=JEIDA, “L” or NC=VESA (LGD) • BIT_SEL : “H” or NC = 10-bit, “L” = 8-bit Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 49 VDD[+5V] 5V_HDMI_1/2/3 TMDS_OUT[8] SIL9287B SIL9287B LGE35230 HDMI 3x1 Switch HDMI_HPD_1/2/3 HDMI 3x1 Switch (IC3701) (IC3701) DDC_I2C_1/2/3 EEPROM TMDS1/2/3[8] (Audio Return Channel) Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 50 USB_PORT2DN USB_PWRFLT_2 USB PWR +5V_USB Switch (IC1203) USB_PWRON_2 +3.3V_Noraml SIDE_USB_DP USB_PORT1DP USB1 SIDE_USB_DM USB_PORT1DN USB_PWRFLT_1 USB PWR +5V_USB Switch (IC1204) USB_PWRON_1 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 51 0x52 0x52 I2C3_3.3V NVRAM HDMI Switch HDMI Switch NVRAM M24M01 SII9287B TAS5727 M24M01 SII9287B TAS5727 0xB0 0x54 0xA8 0xA8 0xB0 0x54 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 52 Check LVDS Power Voltage Replace Q507 Q507 : 12V Check Inverter Control Check Power Board or Module P501 18 pin : High Change Module Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 53 Check IF_P/N Signal Bad Tuner. Replace Tuner. TU5101 17/18 Pin Replace or BCM( IC101) or Main Board. Check BCM LVDS Output Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 54 Replace IC5103 Check CVBS Signal TU5101 11 Pin Bad Tuner. Replace Tuner. Replace BCM( IC101) or Main Board. Check BCM LVDS Output Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 55 • Rear AV Detect : R1129 • Side AV Detect : R1113 Replace LGE35230( IC101) Check BCM LVDS Output or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 56 Replace Jack Y/PB/PR signal Line Check COMP_DET Signal Replace R1114 or R1130 Check BCM LVDS Output Replace BCM( IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 57 IC3802 I2C Signal R3811, R3812(SDA,SCL) Check P3801 H/V_Sync/R/G/B Signal Line Replace Jack L3806/7/8 Check DSUB_DET Replace R3815 Check BCM LVDS Output Replace BCM( IC101). Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 58 Check HDMI Signal output Replace the defective IC. of HDMI Switch (IC701) Check BCM LVDS Output Replace BCM( IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 59 Replace Audio AMP IC(IC1702) Replace connector Check Connector & P1702 if found to be damaged. Check speaker resistance and connector damage. Replace speaker. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 60 IC2103 2 pin : 1.26V Check IF_P/N Signal Bad Tuner. Replace Tuner. TU2101 17,18 Pin Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 61 TU2101 9th Pin Check TU_SIF path Replace component Including Q2104 TR buffer to LGE35230 Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 62 Check Audio AMP voltage +3.3V,+24V_AMP Check output L1703,4,7,8 Replace Audio AMP TAS5727 AMP output Follow procedure & refer to Audio signal block Diagram Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 63 Check JK1105 & Signal Line Replace Jack Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 64 Check p3801 & Signal path Replace Jack or components Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 65 14. Trouble shooting - No audio (SPDIF) Check SPDIF Cable Check JK3802 Replace Jack SPDIF_OUT Signal(5V) Replace IC101 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 66 Check Earphone AMP Mute (Pin 13) Check Earphone output Replace IC3804 TPA6132A2 (Pin 5, 16) Follow procedure & refer to Audio signal block Diagram Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 67 - USB power could be disabled by inrushing current - In this case, remove the device and try to reboot the TV (AC power off/on) Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 68 & Recheck Replace one of LAN Port Maybe LGE35230 LAN PHY block Check LAN Port LED & Recheck has problems. Replace It Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 69 Check the Tool Option 6 Correct the Tool Option5 ( using reference file ( GP3_BCM_TOOL OPTION)) Reference file : GP3_Tool option Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 70 : You can check current Local Dimming binary file version. When you upgrade latest F/W, you can re-download with using this menu. If TV system doesn’t support Local Dimming Function, you can’t see this menu. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 71 5. EDID(AC3) : OK (0x89) OK (0x7F,0xC9) HDMI1 OK (0x7F, 0xB9) HDMI2 OK (0x7F, 0xA9) HDMI3 OK (0x7F, 0x99) HDMI 4 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 72 22. Trouble shooting - SW download The latest S/W put in the ‘LG DTV’ folder of USB Memory USB connects to USB jack for service. If SW update screen appears, push the OK button. The SW update is finished, please check new SW version by in-start menu.

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