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LG 47LH90 Service Manual
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LG 47LH90 Service Manual

LG 47LH90 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LA92C
MODEL : 47LH90
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL58600434 (0904-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
47LH90-UB
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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  • 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 : LA92C MODEL : 47LH90 47LH90-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL58600434 (0904-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS ....................2 SAFETY PRECAUTIONS ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 EXPLODED VIEW ...................14 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

    2) Humidity : ~ 80 % 1) Temp : -20 ~ 60 deg Storage Environment 2) Humidity : ~ 85 % Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 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. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080P 1920*1080 26.97 23.94 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. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: 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) Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 0x0D 8A 0x09 09 0x0E 00 0x0A 3A 0x0F 20 0x0B 1E 0x0C 00 0x0D 8A 0x0E 00 0x0F 20 Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: 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. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 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. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 - GND TEST = POWER CORD GND & SIGNAL CABLE METAL GND - Internal Pressure TEST = POWER CORD GND & LIVE & NEUTRAL • LEAKAGE CURRENT: At 0.5mArms Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: 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. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 XTAL R804 SMD Gasket Option URSA_A+[0-4],URSA_A-[0-4],URSA_ACK+,URSA_ACK- URSA_B+[0-4],URSA_B-[0-4],URSA_BCK+,URSA_BCK- X800 008:P27 M_XTALI 0 08:P27 M_XTALO +3.3V_MEMC GAS1 SMD_Gasket 12MHz C800 C801 MDS61887701 R812 R818 20pF 20pF L805 R813 R819 BLM18PG121SN1D GAS2 SMD_Gasket +3.3V_MEMC MDS61887701 R814 R820 R815 R821 +1.26V_MEMC GAS3 SMD_Gasket +3.3V_MEMC MDS61887701 R816 R822...
  • Page 16 +3.3V_ST +3.3V_ST 5V_HDMI_3 R1500 R513 R528 HPD3 005:AD6 IC501 SSM6N15FU R522 C501 0.1uF 001:C32 SOURCE1 DRAIN1 HDMI_CEC CEC_REMOTE JP502 R520 R510 GATE1 GATE2 005:H8;005:H26;005:H17;005:R8;005:AM11 JP503 DDC_SDA_3 005:AE6;005:AF26 DDC_SCL_3 R511 DRAIN2 SOURCE2 005:AE6;005:AF25 005:H8;005:H17;005:L27;005:R8;005:AM11 R509 CEC_REMOTE C503 R590 005:AE6 0.1uF CK-_HDMI3 005:AE6 R585 CK+_HDMI3...
  • Page 17 R2232 +5V_TU L1003 C1008 C1011 C1005 C1007 C1013 C1016 10uF 0.1uF 0.1uF 0.01uF 220uF 220uF +5V_TU L1006 +3.3V_AVDD_PVSB 1N4148W R1074 D1000 C1053 C1051 C1052 C1054 10uF 0.1uF 0.01uF C1071 C1072 TDVW-H103F 220uF TU1001 27pF 27pF NC_1 X1005 C1073 VSB_RESET NC_2 +5V_TU R1075 25MHz...
  • Page 18 NAND FLASH MEMORY S5 Reset POWER_ON_DELAY IC102 HY27US08121B-TPCB +3.3V +3.3V R188 Q105 2SC3052 +3.3V_ST 4.7K NC_1 NC_28 001:V17 S5/S6_Reset /PF_CE0 IC103 IC100 NC_2 NC_27 R187 X100 H : Serial Flash MAX810RTR LGE3369A (Saturn6 Non RM) 12MHz C186 1386 WON L : NAND Flash PCM_A[0-7] NC_3 NC_26...
  • Page 19 P3501 DIMMING_1.8V DIMMING_RX_1.8V 12507WS-08L +3.3V DIMMING_3.3V DIMMING_TX_3.3V IC3500 IC3503 DIMMING_PLL_1.8V AZ1117D-3.3TRE1 AZ1085S-ADJTR/E1 LOCAL DIMMING DDC L3500 L3501 L3502 R3564 BLM18PG121SN1D BLM18PG121SN1D BLM18PG121SN1D INPUT OUTPUT INPUT OUTPUT DIMMING_3.3V C3500 C3508 C3511 C3513 C3521 C3531 C3501 C3509 C3510 C3514 C3525 C3528 C3530 R3572 22uF C3529...
  • Page 20 PWM Dimming +1.26V_VDDC C166 C169 C172 C175 C178 C183 C188 C193 C198 C2104 C2109 C2115 C2119 C2137 C2120 C2123 C2124 C2125 C2126 C2127 C2128 C2129 C2130 C2131 C2132 C2133 C2134 C2135 C163 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 21 [CONTROL IR & LED] Pin to Pin Replacable with T-MIC2019YM6 +3.3V +3.3V_ST +5V_EXT P1200 R1219 L1219 IC1202 12507WS-12L MIC2009YM6-TR 4.7K CB3216PA501E VOUT ILIMIT R1229 C1244 USB_CTL C1245 0.1uF FAULT/ ENABLE SCL_SUB/AMP USB_DM 10uF ZENER C1209 D1201 001:AR34 001:AI5;006:D11 330uF CDS3C05HDMI1 R1230 5.6V 5.6V...
  • Page 22 DDR2 1.8V By CAP - Place these Caps near Memory +1.8V_MEMC +1.8V_FRC_DDR +1.8V_FRC_DDR +1.8V_FRC_DDR BLM18PG121SN1D L900 PI Result +1.8V_FRC_DDR +1.8V_FRC_DDR 008:U4;009:AL21 URSA_DQ[0-31] URSA_DQ[0-31] 008:U4;009:D21 IC900 IC901 AR900 AR914 URSA_DQ[27] DDR_DQ[27] DDR_DQ[15] URSA_DQ[15] HYB18TC256160BF-2.5 HYB18TC256160BF-2.5 URSA_DQ[28] DDR_DQ[28] DDR_DQ[8] URSA_DQ[8] URSA_DQ[25] DDR_DQ[25] DDR_DQ[10] URSA_DQ[10] URSA_DQ[30]...
  • Page 23 DDR2 1.8V By CAP - Place these Caps near Memory +1.8V_DDR +1.8V_S_DDR BLM18PG121SN1D 0.1uF 0.1uF +1.8V_S_DDR +1.8V_S_DDR +1.8V_S_DDR IC100 IC1-*1 0.1uF 1000pF IC2-*1 HY5PS1G1631CFP-S6 HYB18TC1G160C2F-2.5 LGE3369A (Saturn6 Non RM) HYB18TC512160B2F-2.5 H5PS5162FFR-S6C VREF VREF VREF SDDR_D[0] TDDR_D[0] SDDR_A[5] ADDR2_A[5] VREF A_MVREF SDDR_D[1] AR13 TDDR_D[1]...
  • Page 24 FROM LIPS & POWER B/D +5V_+12V Stand-by +3.3V +5V_ST +3.3V_ST +5V_ST +3.3V_ST +12V L701-*1 Replaced Part L708 L715 R775 +3.3V_ST CB3216PA501E IC702 +3.3V_AVDD_MPLL CB3216PA501E L724 RL_ON_RESISTER CB3216PA501E AP1117E33G-13 L701 C749 L703 C758 BG2012B121F R705 R772 +5V_ST C756 10uF 0.1uF BLM18PG121SN1D ADJ/GND POWER_ON_DELAY 0.1uF...
  • Page 25 AUDIO +24V +24V_AMP L602 MLB-201209-0120P-N2 C602 35V/8.0PI SPK_L+ 006:AH11 DEV.68uF +24V_AMP D601 C639 L606 0.01uF 1N4148W R613 DA-8580 100V R617 C635 R625 EAP38319001 R621 0.1uF 4.7K C629 1000pF C633 SPEAKER_L 0.47uF C615 R622 C643 0.01uF C620 C630 0.1uF C621 C625 C636 0.01uF 1000pF...
  • Page 26 +3.3V +5V_VGA +5V_ST COMPONENT1 COMPONENT2 +3.3V D1223 +3.3V ENKMC2838-T112 RGB PC R1204 R1237 R1277 001:AR23 001:AR23 Neet to pull up 3.3V R1240 R1283 AV_CVBS_DET COMP1_DET COMP2_DET R1212 D1220 D1244 D1231 C1206 ADMC5M03200L_AMODIODE COMP_JACK 001:AR23 CDS3C05HDMI1 ADMC5M03200L_AMODIODE 5.6V 100pF 5.6V 5.6V JK1206 PPJ227-01 R1253...
  • Page 27 Digital Audio SPDIF (Optic) CLK,TDI,TDO,MS,RST JTAG RS-232C RX/TX RX/TX MAX3232 (CTRL./SVC) Reset Reset IC Reset Switch (MAX809RTR) DP/DM/ +5V 12MHz X-tal Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 D2+/-_HDMI3 COMP1_Pr SC1_R CEC_REMOTE COMP1_Pb SC1_B CK+/-_HDMI4 COMP2_Y D0+/-_HDMI4 COMP_Y+ COMP2_Pr D1+/-_HDMI4 COMP_PR+ COMP2_Pb D2+/-_HDMI4 COMP_PB+ CEC_REMOTE AV_CVBS_IN SIDE_CVBS SIDEAV_CVBS_IN SC2_CVBS Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 * Each of analog signals shall be designed with “Common Mode (INCM) signal ” * Each of HPD in/out signal of HDMI Port goes to GPIO Port of BCM3548 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 30 /PF_OE /PF_CE0 /PF_CE0 /PF_CE1 /PF_CE1 +3.3V PF_ALE PF_ALE +3.3V /PF_WE /PF_WE S5/S6_Reset Reset IC PF WP HWRESET (MAX809RTR) PF_AD15 Reset Switch Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 (LG1130) 100 ohm +5V_Gen. I2C Channel 1 UART2_TX EEPROM 33 ohm 0 ohm /SDA EEPROM_SCL (AT24C512BW) 33 ohm 0 ohm UART2_RX Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 0 ohm (LVDS WAFER) VSB_RESET VSB IC ET_MDIO (LGDT3305) P800 0 ohm (LVDS WAFER) USB_DM USB_DM2 JK1204 USB_DP USB_DP2 (USB JACK) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 LVDS 출력 Block 100KHz ~ 400KHz I2C Master I2C Master I2C slave Local BCM3549 Dimming Module wafer (LG1130) I2C Master 32kbit EEPROM Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 I2C M EEPROM_NA EEPROM_WP 32kbit EEPROM 시스템을 꾸밀 때 선택적으로 이용할 수 있는 외부 IC들 (추가되는 IC없이 Local Dimming IC만으로 동작가능) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 M_VS SSPLL M_SCLK SSIC M_MOSI SCLKI clk25_sel S_VS S_SCLK clk_vco S_MOSI 25MHz +/- 10% clk_xtal : I2C & BLC operation clk_disp : Local Dimming Core operation Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 LED driver Local Dimming Spatial Filter Temporal Backlight Pixel Pixel Gain Filter Estimation Compensation Configurable Configurable LCD Panel Backlight Control Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LED driver LGE Internal Use Only Only for training and service purposes...
  • Page 37 (#13,14) +12V L707 Q706 12V_TCON L708 L728 SI4925BDY IC706 +5V_EXT L722 L718 MP2212DN IC1003 IC1002 +5V_TU +5V_TUNER L1009 L1010 AS7809D KIA78R05F Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 RGB DDC M24C02 Q706 SI4925BDY L715 IC3500 Dimming_3.3V Dimming_TX_3.3V L3500 AZ1117D IC704 +3.3V L716 L710 L720 MP2212DN +3.3V_FE L727 +3.3V_MEMC L714 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 L1007 SC156515M +3.3V_DVDD_PVSB +3.3V_PVSB L1008 IC1000 +1.2V_PVSB +1.2V_DVDD_PVSB R1034 SC4215IST IC705 +1.26V_VDDC L725 L726 MP2212DN IC1202 JK1204 USB VCC L1210 MIC2009YM6 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 MAX809RTR P1200 L1200 IR & LED +3.3V_AVDD_MPLL L703 IC704 +3.3V_MEMC MP2212DN L714 IC801 LVDS IC L804 MST7323S IC800 SPI FLASH W25X20A Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 +1.8V for Saturn5 DDR +1.8V_DDR L702 SC4215I +3.3V_VDDP L101 NAND Flash IC102 Memory IC104 L104 EEPROM AT24C512 IC502 +3.3V_HDMI L501 TDA9996HL +3.3V_BCM3548 L103 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 After checking thoroughly all path once again, You should decide to replace LGE7329. Although you replace it, you cannot see normal display, decide to replace Main chip(LGE3159) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 After checking thoroughly all path once again, You should decide to replace LGE7329. Although you replace it, you cannot see normal display, decide to replace Main chip(LGE3159) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 After checking thoroughly all path once again, You should decide to replace LGE7329. Although you replace it, you cannot see normal display, decide to replace Main chip(LGE3159) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 After checking thoroughly all path once again, You should decide to replace LGE7329. Although you replace it, you cannot see normal display, decide to replace Main chip(LGE3159) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 47 After checking audio signal line, you should decide to replace item or not. Measure waveform at C147 because it’s more easy to check. Can you see the normal waveform? Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 Can you see the normal waveform? Check IC600(NTP-3100L) L606/L607 After checking audio signal line, you should decide to replace item or not. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 Check IC600(NTP-3100L) L606/L607 After checking the Power & Select Pin & Etc of this chip, you should decide to replace this or not. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 Check IC600(NTP-3100L) L606/L607 After checking audio signal line, you should decide to replace item or not. Check the connector & Speaker Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 After checking audio signal line, you should decide to replace item or not. Can you see the normal waveform? After checking the Jack, you should decide to replace item or not. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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