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LG 42LD452B Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LA01Z
MODEL : 42LD452B
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL66679907 (1105-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42LD452B-UA
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 42LD452B

  • 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 : LA01Z MODEL : 42LD452B 42LD452B-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL66679907 (1105-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS ....................2 SAFETY PRECAUTIONS ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION............... 11 EXPLODED VIEW .................. 17 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: Specification

    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 -0.015 0.273 +0.015 ±0.015 for Adjustment Medium Typ. 0.285 Typ. -0.015 0.293 +0.015 Warm Typ. 0.313 Typ. -0.015 0.329 +0.015 Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 -0.015 0.273 +0.015 ±0.015 for Adjustment Medium Typ. 0.285 Typ. -0.015 0.293 +0.015 Warm Typ. 0.313 Typ. -0.015 0.329 +0.015 Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 1360*768 47.712 60.015 85.50 VESA(WXGA) 1280*1024 63.981 60.020 108.00 VESA(SXGA) 1600*1200 75.00 60.00 VESA(UXGA) 1920*1080 66.587 59.934 148.5 HDTV 1080P 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

    •Ship-out mode setting (In-Stop) 3.3 Etc •Ship-out mode •Service Option Default •USB Download(S/W Update, Option, Service only) •ISP Download (Optional) Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 If ADC calibration is failure, “ADC RGB Fail” is displayed. 9) If ADC calibration is failure, after recheck ADC pattern or condition, retry calibration Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: White Balance Adjustment

    00 1f -> Gain adj. complete *(wb 00 20(start), wb 00 2f(end)) -> Off-set adj. wb 00 ff -> End white balance auto adj. Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Adj. menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern. Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 • After final inspection, press In-Stop key of the Adj. R/C and check that the unit goes to Stand-by mode. • After final inspection, Always turn on the Mechanical S/W. Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 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. - 16 - LGE Internal Use Only Only for training and service purposes...

  • Page 17: 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. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 PStoPDF trial version. http://www.oakdoc.com 32_FHD 42_FHD_60_LAMP 37_FHD 42_FHD (Without 60Hz Lamp) R637-*2 R620-*1 R621-*1 R637-*1 R620-*2 R621-*2 220K 220K SHEET7 TCON_37_FHD SHEET7 R620-*3 R621-*3 R637-*3 220K TCON_32_FHD TCON_32_FHD TCON_32_FHD TCON_37_FHD TCON_37_FHD R643-*2 TCON_42_FHD TCON_42_FHD TCON_42_FHD R622-*2 R622-*1 R643-*1 150K 270K R622-*3 R643-*3 150K...
  • Page 19 PStoPDF trial version. http://www.oakdoc.com VCC_1.5V_DDR VCC_1.5V_DDR VCC_1.5V_DDR VCC_1.5V_DDR VCC_1.5V_DDR DDR3 1.5V By CAP - Place these Caps near Memory VCC_1.5V_DDR DDR3 1.5V By CAP - Place these Caps near Memory A-MVREFDQ A-MVREFCA B-MVREFDQ B-MVREFCA Close to DDR Power Pin Close to DDR Power Pin CLose to DDR3 CLose to Saturn7M IC CLose to Saturn7M IC...
  • Page 20 PStoPDF trial version. http://www.oakdoc.com ISDB_DEMOD +1.2V_DE +3.3V_DE R2910 FE_TS_VAL_ERR ISDB_DEMOD PANASONIC ISDB_DEMOD ISDB_DEMOD R2911 ISDB_DEMOD ISDB_DEMOD ISDB_DEMOD FE_TS_SYNC C2913 C2916 C2917 C2920 C2922 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 .
  • Page 21 PStoPDF trial version. http://www.oakdoc.com LGIT CAN H/N TUNER for US +5V_TU OPTION : BOOSTER L5001 MLB-201209-0120P-N2 OPTION : RF S/W BOOSTER_OPT RF_SWITCH_CTL R5014 R5019 OPTION : RF AGC C5002 BOOSTER_OPT BOOSTER_OPT 0 . 1 u F C5026 C5027 RF_S/W_OPT 0 . 1 u F 10uF P u l l - u p c a n ’...
  • Page 22 PStoPDF trial version. http://www.oakdoc.com [51Pin LVDS Connector] ( F o r F H D 6 0 / 1 2 0 H z ) PANEL_VCC [ R i g h t F F C C o n n e c t o r ] ( 6 0 P i n M i n i - L V D S ) [LEFT FFC Connector] [41Pin LVDS Connector]...
  • Page 23 PStoPDF trial version. http://www.oakdoc.com +1.8V_AMP +3.3V_Normal IC404 AP1117E18G-13 ADJ/GND Vd=1.4V 120 mA C434 C421 C446 0 . 1 u F 0 . 1 u F 10uF SPK_L+ D501 1N4148W L507 100V AD-9060 R535 3 . 3 C529 390pF SPEAKER_L C534 0 .
  • Page 24 PStoPDF trial version. http://www.oakdoc.com OMMON AREA USB_DIODES IC1450 AP2191SG-13 +5V_USB OUT_2 $ 0 . 0 7 7 IN_1 C1452 OUT_1 IN_2 10uF C1451 22uF +3.3V_Normal +12V/+15V L101 Q102 AO3407A MLB-201209-0120P-N2 R1456 C114 C120 USB1_CTL 2 . 2 u F 47uF R1451 C113 USB1_OCD...
  • Page 25 PStoPDF trial version. http://www.oakdoc.com SCART OPTION BLOCK TP3801 SC1_FB SC1_CVBS_IN TP3802 SC1_ID SC_RE1 TP3803 TP3804 SC_RE2 TP3805 SCART1_MUTE 5V_HDMI_1 5V_DET_HDMI_1 TP3806 HDMI_1 SC1_SOG_IN TP3807 SCART1_Lout TP3808 SCART1_Rout Q802 R830 R896 2SC3052 TP3809 DTV/MNT_VOUT $0.253 C802 R804 0 . 1 u F 1.8K R825 R826...
  • Page 26 PStoPDF trial version. http://www.oakdoc.com [ L E V E L S h i f t B l o c k ] [POWER Block] D607 MMSD4148T1G VDD_LCM (+16V) 100V VCC_LCM CHECK Value!! ( + 3 . 3 V ) TCON_42_FHD_60_LAMP R635 R640 C628 C635...
  • Page 27 PStoPDF trial version. http://www.oakdoc.com CONTROL IR & LED +3.5V_ST EYEQ/TOUCH_KEY R2411 NEC_EEPROM_SCL P2401 12507WR-12L 5 . 6 B C2408 1000pF D2403 L2401 R2401 BLM18PG121SN1D KEY1 EYEQ/TOUCH_KEY L2402 R2402 NEC_EEPROM_SDA BLM18PG121SN1D R2412 5 . 6 B KEY2 C2409 D2404 1000pF JP2407 +3.5V_ST +3.5V_ST JP2408...
  • Page 28 PStoPDF trial version. http://www.oakdoc.com X1002-*1 32.768KHz CRYSTAL_EPSON CRYSTAL_KDS X1002 32.768KHz R1034 4.7M CRYSTAL_KDS R1091 +3.5V_ST f o r D e b u g g e r SW1001 JTP-1127WEM MICOM_DEBUG P1001 12505WS-12A00 MICOM_RESET NEC_ISP_Tx NEC_ISP_Rx R1047 1/16W OCD1A EDID_WP OCD1B Q1001 2SC3052 FLMD0 R1002...
  • Page 29 PStoPDF trial version. http://www.oakdoc.com 15V-->3.6V +12V/+15V 20V-->3.5V +24V +12V/+15V + 3 . 5 V _ S T - > 3 . 3 7 5 V FROM LIPS & POWER B/D +3.5V_ST PANEL_POWER 24V-->3.48V +3.5V_ST ON-SEMI 12V-->3.58V R488 S T _ 3 . 5 V - - > 3 . 5 V - > 3 . 3 7 5 V 100K IC408 NCP803SN293...
  • Page 30 PStoPDF trial version. http://www.oakdoc.com IC301-*1 H5TQ1G63BFR-H9C VCC1.5V_U3_DDR DDR3 1.5V By CAP - Place these Caps near Memory VCC1.5V_U3_DDR FRC_DDR_1333 +1.5V_FRC_DDR VREFCA L301 VREFDQ C324 C325 10uF 0 . 1 u F Close to DDR Power Pin VDD_1 A10/AP VDD_2 VDD_3 A12/BC VDD_4 VDD_5...
  • Page 31 PStoPDF trial version. http://www.oakdoc.com RSDS Power OPT +3.3V_Normal +1.26V_VDDC +1.26V_VDDC VDDC 1.26V MODEL OPTION VDD_RSDS:88mA VDDC : 2026mA MODEL OPTION VDD_RSDS PIN NAME PIN NO. HIGH L213 +2.5V_Normal BLM18PG121SN1D MODEL_OPT_0 NO FRC L214 MODEL_OPT_1 MINI LVDS LVDS VDD33 BLM18PG121SN1D MODEL_OPT_2 DDR_512MB DDR_256MB R201...
  • Page 32 PStoPDF trial version. http://www.oakdoc.com IC102 HY27UF082G2B-TPCB NAND FLASH MEMORY +3.3V_Normal +3.3V_Normal NC_1 NC_29 LGE107D (S7M Divx_Non RM) 2GBIT /PF_CE0 NC_2 NC_28 H : S e r i a l F l a s h <T3 CHIP Config(AUD_LRCH)> IC101 PCM_A[0-7] L : N A N D F l a s h NC_3 NC_27 /PF_CE1...
  • Page 33 PStoPDF trial version. http://www.oakdoc.com NOT USING B/T BT_DM NON CI Region BT_DP BT_LOUT /PCM_REG FE_TS_DATA[0] /PCM_CD FE_TS_DATA[1] /PCM_OE PCM_5V_CTL FE_TS_DATA[2] /PCM_WE /PCM_CE FE_TS_DATA[3] /PCM_IORD /PCM_IOWR /PCM_IRQA FE_TS_DATA[4] FE_TS_DATA[5] FE_TS_SYNC NON ETHERNET FE_TS_DATA[6] FE_TS_VAL_ERR PCM_RST FE_TS_DATA[7] /PCM_WAIT FE_TS_CLK CI_TS_CLK FE_TS_DATA[0-7] CI_TS_VAL CI_TS_SYNC TP2101 EPHY_RXD0...
  • Page 35 I2C Block GPIO Block GPIO Block LVDS 출력 Block LVDS 출력 Block POWER Block POWER Block LG Electronics/ BS Division Commercial Gr. Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 36 IR_IN I2C(SCL/SDA) Digital Audio SPDIF Micom (Optic) Reset Switch S/W Reset (UPD78F0513AGA) RS-232C RX/TX RX/TX MAX3232 (CTRL./SVC) 24MHz X-tal DP/DM/ +5V Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 37 COMP1_Pr RIN1P/M COMP1_Pb BIN1P/M RXCCKP CK+/-_HDMI4 RXCCKN D0+/-_HDMI4 RXC0P D1+/-_HDMI4 RXC0N RXC1P D2+/-_HDMI4 AV_CVBS_IN RXC1N CVBS0P CEC_REMOTE RXC2P SIDEAV_CVBS_IN CVBS1P RXC2N Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 38 & S7 T (LGE105) HP_ROUT Audio R SIDEAV_L_IN HP_LOUT Audio L AUL0 SIDEAV_R_IN AUR0 PC_L_IN +3.3V AUL4 PC_R_IN AUL5 SPDIF_OUT SPDIF_OUT Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 39 /PF_OE /PF_OE /PF_CE0 /PF_CE0 /PF_CE1 /PF_CE1 PF_ALE +3.3V PF_ALE /PF_WE +3.5V_ST /PF_WE PF WP SOC_RESET Micom HWRESET PF_AD15 (UPD78F0513AGA) Reset Switch Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 40 2 ohm DDCA_DA IC1105 33ohm 33 ohm +5V_Gen. EEPROM EEPROM DDCDA_CK/DDCDC_CK 22 ohm (AT24C512BW) AT24C02BN8 RGB_DDC_SCL/SDA DDCDA_DA/DDCDC_DA IC1001 22 ohm IC801/IC804 Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 41 & S7 T (LGE105) S7_RXD UART_RX2 RS232C R2619 S7_TXD (MAX3232CDR) UART_TX2 R2618 GPIO 8/PM2 USB_DM USB_DM1 JK1204 USB_DP USB_DP1 (USB JACK) Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 42 PM_SPI_DO/GPIO3 SPI_SDO GPIO151/TCON8 SIDEAV_DET PM_SPI_DI/GPIO2 SPI_SDI GPIO149/TCON6 5V_DET_HDM I_3 GPIO0/PM_SPI_CZ GPIO147/TCON4 5V_DET_HDM I_4 PM_SPI_CK/GPIO1 SPI_SCK GPIO145/TCON2 5V_DET_HDM I_2 GPIO143/TCON0 5V_DET_HDM I_1 Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 43 AUDIO AMP AMP_MUTE ( NTP3100L) Micom (UPD78F0513AGA) NEC_RXD IC1002 RXD0 RS232C R2619 NEC_TXD (MAX3232CDR) TXD0 R2618 KEY1 ANI6 KEY2 ANI7 INTP5 Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 44 SCART1_M UTE P130 WIRELESS_SW_CTRL P01/TI010/TO00 EDID_WP P00/TI000 OPC_EN P140/PCL/INTP6 RL_ON P120/INTP0/EXLVI KEY2 WIRELESS_PWR_EN WIRELESS_DETECT RESET M ICOM _RESET FLMD0 FLM D0 Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 45 LVDS TXA1+/- LVDS Wafer LVDS TXA2+/- (HD, 60Hz) LGD(19”/22”) LVDS TXAC+/- LVDS TXA3+/- S7(LGE101D) LVDS & S7 T (LGE105) OUT Block Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 46 AMP_SDA GCLK / VDD_EVEN_ODD/VST (33V level) IC601 GMA (gamma voltage) Vcom / Vgh / Vdd / Vcc / Vgl / HVDD Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 47 Main SOC S7(LGE101D) & S7 T(LGE105) IC407 +1.5V_DDR MP2212DN (DCDC)3A IC1, IC2 H5PS5162FFR-S6C DDR2 IC1101 MAX3232CDR (RS-232C) IC408 NCP803SN293 Power_DET (RESET IC) Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 48 (#17,19,21) USB JACK (DCDC)3A (OPC) IC405 +3.3V_Normal AOZ1073AIL (DCDC)3A IC409 +5V_Normal AOZ1072AIL (DCDC)2A Q409 PANEL_VCC AO3407A P703 (FET) IC408 Power_DET NCP803SN293 Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 49 NTP7000 IC404 +1.8V_AMP IC600 AZ1117H-1.8TRE1 NTP-3100L TU6600 +3.3V_TU TDVJ-H001F L5003 Tuner IC402 +2.5V_Normal AZ2940D-2.5TRE1 IC100 Main SOC S7(LGE101D) & S7 T(LGE105) Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 50 +5V_Normal AOZ1073AIL AT24C02BN L422 For HDMI (DCDC)3A EDID EEPROM IC1105 AT24C02BN For RGB PC EDID EEPROM TU6600 +5V_TU TDVJ-H001F L5002 Tuner Copyright ⓒ 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...

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