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LG 32LD420-SA Service Manual
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LG 32LD420-SA Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LJ01B
MODEL : 32LD420
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL62886916 (1007-REV00)
All manuals and user guides at all-guides.com
North/Latin America
Europe/Africa
Asia/Oceania
32LD420-SA
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 32LD420-SA

  • Page 1 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 : LJ01B MODEL : 32LD420 32LD420-SA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL62886916 (1007-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    PRODUCT SAFETY ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 10 BLOCK DIAGRAM...................15 EXPLODED VIEW .................. 16 SVC. SHEET ....................Copyright LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Product Safety

    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 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

    3. Test method 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety: CE, IEC specification - EMC:CE, IEC Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 Temp : 0 ~ 40 deg Humidity : ~ 80 % Storage Environment Temp : -20 ~ 60 deg Humidity : -85 % Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 Max Vertical Freq - 62 Hz Min Horiz. Freq - 30 kHz Max Horiz. Freq - 80 kHz Pixel Clock - 170 MHz Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 Max Vertical Freq - 62 Hz Min Horiz. Freq - 30 kHz Max Horiz. Freq - 80 kHz Pixel Clock - 170 MHz Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Adjustment Instruction

    3) Click “Read” tab, and then load download file (XXXX.bin) by clicking “Read” 4) Click “Connect” tab. If “Can’t” is displayed, check connection between computer, jig, and set. Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 4) RGB (PC : 1024 x 768 @ 60hz) 5) HDMI 6) PC Audio In * Display and Sound check is executed by Remote control. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 **: Month : Controlled / Data:00 R Gain ***:Year : Controlled G Gain ****:Check sum B Gain R Cut G Cut B Cut Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 DVI-D to HDMI or HDMI to HDMI Item Condition Data(Hex) Manufacturer ID 1E6D Version Digital : 1 Revision Digital : 3 Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Confirm whether is normal or not when between power board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2 kV(dc) for one second. Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: 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. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 All manuals and user guides at all-guides.com IC102 HY27UF082G2B-TPCB NAND FLASH MEMORY +3.3V_Normal +3.3V_Normal NC_1 NC_29 LGE107D (S7M Divx_Non RM) /PF_CE0 2GBIT NC_2 NC_28 H : Serial Flash <T3 CHIP Config(AUD_LRCH)> IC101 L : NAND Flash PCM_A[0-7] NC_3 NC_27 /PF_CE1 Boot from SPI flash : 1’b0 PCM_D[0-7] H : 16 bit...
  • Page 18 NO_FRC : LOW +2.5V_Normal BLM18PG121SN1D MODEL_OPT_0 NO FRC U3_INTERNAL : HIGH LOW U3_EXTERNAL : HIGH HIGH L214 MODEL_OPT_4 PWIZ TCON with LG FRC : HIGH HIGH 100/120Hz LVDS 50/60Hz LVDS VDD33 BLM18PG121SN1D MODEL_OPT_1 MINI LVDS LVDS R201 C4005 IF_AGC_SEL MODEL_OPT_0 0.1uF...
  • Page 19 All manuals and user guides at all-guides.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 0.1uF Close to DDR Power Pin VDD_1 A10/AP VDD_2 VDD_3 A12/BC VDD_4 VDD_5 VCC1.5V_U3_DDR...
  • Page 20 All manuals and user guides at all-guides.com ST_3.5V--> 3.375V +12V/+15V 20V-->3.51V +24V +12V/+15V +3.5V_ST -> 3.375V +3.5V_ST FROM LIPS & POWER B/D PANEL_POWER 24V-->3.64V +3.5V_ST 12V-->3.58V R488 18.5V-->3.5V 100K IC408 NCP803SN293 C442 C438 C436 10uF R402 0.1uF New item POWER_DET 0.01uF RESET +3.5V_ST...
  • Page 21 All manuals and user guides at all-guides.com X1002-*1 32.768KHz CRYSTAL_EPSON CRYSTAL_KDS X1002 32.768KHz R1034 4.7M CRYSTAL_KDS R1091 10K +3.5V_ST for Debugger SW1001 JTP-1127WEM MICOM_DEBUG P1001 +3.5V_ST C1003 12505WS-12A00 0.1uF C1010 0.1uF MICOM_RESET NEC_ISP_Tx NEC_ISP_Rx R1047 1/16W OCD1A EDID_WP OCD1B Q1001 FLMD0 2SC3052 R1002 10K...
  • Page 22 All manuals and user guides at all-guides.com CONTROL IR & LED +3.5V_ST EYEQ/TOUCH_KEY R2411 NEC_EEPROM_SCL P2401 R2405 12507WR-12L R2404 5.6B C2408 1000pF D2403 L2401 R2401 BLM18PG121SN1D KEY1 EYEQ/TOUCH_KEY L2402 R2402 D2402 NEC_EEPROM_SDA BLM18PG121SN1D 5.6V R2412 5.6B KEY2 C2409 D2404 AMOTECH C2401 1000pF C2402...
  • Page 23 All manuals and user guides at all-guides.com [LEVEL Shift Block] [POWER Block] D607 MMSD4148T1G VDD_LCM (+16V) 100V VCC_LCM CHECK Value!! (+3.3V) TCON_42_FHD_60_LAMP R635 R640 C628 C635 910K 470K C642 C653 R625 0.1uF R650 TCON_42_FHD_60_LAMP 22uF 9.1K C636 TCON_42_FHD_60_LAMP C638 1/8W R642-*1 C640 C629...
  • Page 24 All manuals and user guides at all-guides.com HDMI EEPROM 5V_HDMI_1 +5V_Normal ENKMC2838-T112 D821 HDMI_3 5V_HDMI_1 HDMI_1 5V_DET_HDMI_1 HDMI_1 IC801 EDID_WP 5V_HDMI_3 5V_DET_HDMI_3 AT24C02BN-10SU-1.8 SHIELD SHIELD R864 R830 Q804 Q802 HPD1 HPD3 R896 2SC3052 R894 2SC3052 $0.055 C806 R884 R888 $0.253 $0.253 C804 C802...
  • Page 25 All manuals and user guides at all-guides.com COMMON AREA New Item Development EARPHONE BLOCK EXCEPT_CHINA_HOTEL_OPT HP_LOUT C1118 10uF 2:X19 C1115 1000pF R1125 JK3301 Q1101 +3.3V_Normal MMBT3904-(F) KJA-PH-0-0177 MMBT3904-(F) Q1104 +3.5V_ST R1155 DETECT HP_ROUT HP_DET EXCEPT_CHINA_HOTEL_OPT C1119 2:X19 10uF C1116 1000pF Q1102 R1128 MMBT3904-(F)
  • Page 26 All manuals and user guides at all-guides.com RS232C IR_OUT R1122 R1123 JP1121 R1124 +3.5V_ST JP1122 D1107 D1108 CDS3C30GTH CDS3C30GTH C1101 0.33uF SPG09-DB-009 IC1101 JK1101 C1106 MAX3232CDR 0.1uF C1102 0.1uF +3.5V_ST C1103 0.1uF DOUT1 R1109 R1114 RIN1 4.7K 4.7K C1104 0.1uF ROUT1 R1157 0 S7_RXD1...
  • Page 27 All manuals and user guides at all-guides.com (New Item Developmen H:9.2mm) SIDE_AV_OPT SIDE_AV L3303 BLM18PG121SN1D SIDEAV_CVBS_IN SIDE_AV_OPT +3.3V_Normal SIDE_AV_OPT C3304 R3301 D3301 100pF [YL]E-LUG SIDE_AV_OPT SIDE_AV_OPT R3305 [YL]O-SPRING R3302 SIDEAV_DET [YL]CONTACT C3301 SIDE_AV_OPT 100pF D3302 SIDE_AV_OPT 5.6V [WH]O-SPRING SIDE_AV_OPT SIDE_AV_OPT [RD]CONTACT L3301 BLM18PG121SN1D...
  • Page 28 All manuals and user guides at all-guides.com WIRELESS READY MODEL JK2601 KJA-PH-3-0168 Wireless power From wireless_I2C to micom I2C VCC[24V/20V/17V]_1 VCC[24V/20V/17V]_2 +3.3V_Normal R2602 VCC[24V/20V/17V]_3 WIRELESS_PWR_EN VCC[24V/20V/17V]_4 VCC[24V/20V/17V]_5 +24V VCC[24V/20V/17V]_6 DETECT +3.3V_Normal R2604 C2601 C2602 INTERRUPT 0.1uF TP2601 2.2uF GND_1 R2612 RESET TP2602 R2605...
  • Page 29 All manuals and user guides at all-guides.com USB_DIODES IC1450 AP2191SG-13 +5V_USB L1451 MLB-201209-0120P-N2 $0.077 OUT_2 IN_1 120-ohm C1452 OUT_1 IN_2 C1453 10uF 0.1uF C1451 22uF +3.3V_Normal R1455 4.7K R1456 0 USB1_CTL R1454 R1451 47 USB1_OCD R1453 SIDE_USB_DM R1452 0 SIDE_USB_DP D1451 D1452 CDS3C05HDMI1...
  • Page 30 All manuals and user guides at all-guides.com 42_FHD_60_LAMP 42_FHD 32_FHD 37_FHD (Without 60Hz Lamp) R620-*1 R621-*1 R637-*1 R620-*2 R621-*2 R620-*3 R621-*3 R637-*3 R637-*2 SHEET7 220K 220K SHEET7 220K TCON_32_FHD TCON_32_FHD TCON_32_FHD TCON_37_FHD TCON_37_FHD TCON_37_FHD TCON_42_FHD TCON_42_FHD TCON_42_FHD R622-*2 R622-*1 R643-*1 R643-*2 R622-*3 R643-*3...
  • Page 31 All manuals and user guides at all-guides.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 Saturn7M IC CLose to DDR3...
  • Page 32 All manuals and user guides at all-guides.com +3.3V_Normal +3.3V_Normal S_FLASH IC1401 MX25L8005M2I-15G +3.3V_Normal C1401 /SPI_CS 0.1uF HOLD# SPI_SDO R1402 SCLK /FLASH_WP SPI_SCK R1405 SPI_SDI R1401 Q1401 KRC103S SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver.
  • Page 33 All manuals and user guides at all-guides.com LGIT CAN H/N TUNER for US&KOR&BRAZIL&TAIWAN&AUS RF_S/W_CTL BST_CTL +B1[5V] NC_1[RF_AGC] NC_2 SCLT SDAT NC_3 NC_4 VIDEO +5V_TU +B2[1.2V] OPTION : BOOSTER +B3[3.3V] RESET IF/AGC L5001 DIF_1[N] MLB-201209-0120P-N2 DIF_2[P] OPTION : RF S/W BOOSTER_OPT SHIELD TU5001-*1 TDTR-T035F...
  • Page 34 All manuals and user guides at all-guides.com PANASONIC (ISDB-T) MN884433 ISDB_DEMOD +1.2V_DE +3.3V_DE R2910 FE_TS_VAL_ERR ISDB_DEMOD ISDB_DEMOD ISDB_DEMOD R2911 ISDB_DEMOD ISDB_DEMOD ISDB_DEMOD C2913 C2916 C2917 C2920 C2922 FE_TS_SYNC 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF ISDB_DEMOD R2912 FE_TS_DATA[0] ISDB_DEMOD (FE_TS_SERIAL) ISDB_DEMOD C2911 R2913 0.1uF FE_TS_CLK...
  • Page 35 All manuals and user guides at all-guides.com Panasonic Demodulator Power(3.3V,1.2V) ISDB_POWER IC3001 SC4215ISTRT +3.3V_DE +3.3V_DE +3.3V_Normal NC_1 +1.2V_DE ISDB_POWER ISDB_POWER R3004 L3001 BLM18PG121SN1D 5.1K ISDB_POWER ISDB_POWER ISDB_POWER ISDB_POWER C3003 C3004 C3001 C3002 0.1uF ISDB_POWER ISDB_POWER 10uF NC_2 NC_3 C3005 C3006 0.1uF 0.1uF 0.1uF...
  • Page 36 All manuals and user guides at all-guides.com +3.3V_Normal R3822 +3.3V_Normal R3827 R3802 COMP2_DET AV_CVBS_DET D3813 5.6V R3803 D3801 C3801 100pF SCART OPTION BLOCK 5.6V AV_R_IN R3824 SC1/COMP1_R_IN TP3801 SC1_FB SC1_CVBS_IN C3811 R3831 R3821 R3833 470K 1000pF TP3802 SC1_ID D3812 5.6V TP3803 SC_RE1 TP3804...
  • Page 37 All manuals and user guides at all-guides.com [51Pin LVDS Connector] (For FHD 60/120Hz) PANEL_VCC [Right FFC Connector] (60Pin Mini-LVDS) [LEFT FFC Connector] [41Pin LVDS Connector] [30Pin LVDS Connector] (60Pin Mini-LVDS) L702 (For FHD 120Hz) (For HD 60Hz_Normal) 120-ohm WAFER_FHD P701 P702 P703 P704...
  • Page 38 All manuals and user guides at all-guides.com +1.8V_AMP +3.3V_Normal IC404 AP1117E18G-13 ADJ/GND Vd=1.4V 120 mA C434 C446 C421 0.1uF 0.1uF 10uF +24V SPK_L+ D501 C540 0.01uF 1N4148W R519 R526 L507 100V AD-9060 R527 C536 R535 R531 0.1uF 4.7K C529 390pF SPEAKER_L C534 0.47uF...
  • Page 39 All manuals and user guides at all-guides.com NOT USING B/T BT_ON/OFF BT_DM BT_DP BT_LOUT SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver. 1.0 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR NON B/T THE CRITICAL COMPONENTS IN THE...
  • Page 40 All manuals and user guides at all-guides.com NON CI Region /PCM_REG /PCM_CD /PCM_OE PCM_5V_CTL /PCM_WE /PCM_CE FE_TS_DATA[0] /PCM_IORD /PCM_IOWR FE_TS_DATA[1] /PCM_IRQA FE_TS_DATA[2] FE_TS_DATA[3] FE_TS_SYNC FE_TS_VAL_ERR PCM_RST FE_TS_DATA[4] /PCM_WAIT FE_TS_CLK FE_TS_DATA[5] FE_TS_DATA[6] CI_TS_CLK FE_TS_DATA[7] CI_TS_VAL CI_TS_SYNC FE_TS_DATA[0-7] PCM_D[0] PCM_D[1] CI_TS_DATA[0] PCM_D[2] PCM_A[0] PCM_D[3] CI_TS_DATA[1]...
  • Page 41 All manuals and user guides at all-guides.com NON ETHERNET TP2101 EPHY_RXD0 TP2102 EPHY_RXD1 EPHY_TXD1 TP2103 EPHY_TXD0 TP2104 EPHY_REFCLK TP2105 TP2106 EPHY_CRS_DV EPHY_MDIO TP2107 TP2108 ET_RXER /RST_PHY TP2109 EPHY_MDC TP2110 EPHY_EN TP2111 SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver.
  • Page 42 All manuals and user guides at all-guides.com NON Motion Remocon Region TP2501 M_REMOTE_RX TP2502 M_REMOTE_TX RF_RESET TP2503 TP2504 RF_ENABLE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver.
  • Page 43 All manuals and user guides at all-guides.com NON CHINA HOTEL AMP_MUTE_HOTEL SPK_R+_HOTEL SPK_R-_HOTEL SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver. 1.0 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
  • Page 44 All manuals and user guides at all-guides.com /PIF_SPI_CS R6001 CHB_CVBS_IN SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP2_Saturn7M Ver. 1.0 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
  • Page 45 All manuals and user guides at all-guides.com...

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32ld420