LG 55LV355C-UA Service Manual
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LG 55LV355C-UA Service Manual

LG 55LV355C-UA Service Manual

Led lcd tv
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LED LCD TV

SERVICE MANUAL

CHASSIS : LA0AC
MODEL : 55LV355C
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67234710(1109-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
55LV355C-UA
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 LED LCD TV SERVICE MANUAL CHASSIS : LA0AC MODEL : 55LV355C 55LV355C-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67234710(1109-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................6 ADJUSTMENT INSTRUCTION ....................10 TROUBLESHOOTING GUIDE ....................15 BLOCK DIAGRAM ........................25 EXPLODED VIEW ........................26 SCHEMATIC CIRCUIT DIAGRAM ....................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 55LV355C-UA (AUO) (55 Edge -0.03 0.333 +0.03 LED) GREEN 0.308 0.607 BLUE 0.150 0.060 WHITE 0.279 0.292 Color coordinate uniformity 0.634 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 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 740176 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 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. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Adjustment Instruction

    3.3 Etc (1) Ship-out mode (2) Service Option Default (3) USB Download(S/W Update, Option, Service only) (4) ISP Download (Optional) Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: White Balance Adjustment

    (4) Video Signal Generator MSPG-925F 720p/204-Gray Block0 (Model: 217, Pattern: 49) • Color Analyzer Matrix should be calibrated using CS-1000 Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 • W/B Adj. must begin as start command “wb 00 00” , and finish as end command “wb 00 ff”, and Adj. offset if need 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 2. Select "Tool Option 1" and Push “OK” button. 3. Punch in the number. (Each model has their number.) 4. Updating is starting. Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Troubleshooting Guide

    Check Inverter Control & Error Out Check Power Board or Module P403 18 pin : High P403 24 pin : low Change Module Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 IC3703 2 pin : 1.2V Check IF_P/N Signal Bad Tuner. Replace Tuner. TU3702 17/18 Pin Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 IC3703 2 pin : 1.2V Check CVBS Signal Bad Tuner. Replace Tuner. TU3702 11 Pin Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...

  • Page 18: Component Video

    Y/PB/PR signal Line Check COMP_DET Signal Replace R1614, R4223 or R1615 Check Mstar LVDS Output Replace Mstar(IC100) or Main Board. Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 Replace Jack H/V_Sync/R/G/B Signal Line Check DSUB_DET Replace R1146 or R1147 Check Mstar LVDS Output Replace Mstar(IC100) or Main Board. Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Check HDMI Signal Replace Main Board If no problem, check signal line Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 1, 2, 3, 4 pin. Replace connector Check Connector & P501 if found to be damaged. Check speaker resistance Replace speaker. and connector damage. Copyright LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 IC3703 2 pin : 1.2V Check IF_P/N Signal Bad Tuner. Replace Tuner. TU3702 17/18 Pin Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 IC3703 2 pin : 1.2V Check CVBS Signal Bad Tuner. Replace Tuner. TU3702 11 Pin Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 Check JK1104 & Signal Line Replace Jack Follow procedure ‘8. All source audio’ trouble shooting guide. Copyright LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...

  • Page 25: Block Diagram

    BLOCK DIAGRAM Copyright LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...

  • Page 26: 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. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 IC102 S7M-PLUS_DivX_MS10 HY27UF082G2B-TPCB NAND FLASH MEMORY +3.3V_Normal +3.3V_Normal LGE107DC-RP [S7M+ DIVX/MS10] NC_1 NC_29 /PF_CE0 IC101 NC_2 NC_28 EAN60708701 H : S e r i a l F l a s h L : N A N D F l a s h PCM_A[0-7] NC_3 NC_27...
  • Page 28 RSDS Power OPT VDDC 1.26V +3.3V_Normal +1.26V_VDDC +1.26V_VDDC MODEL OPTION VDD_RSDS:88mA VDDC : 2026mA MODEL OPTION VDD_RSDS PIN NAME HIGH PIN NO. OPT_0 OPT_4 L213 +2.5V_Normal BLM18PG121SN1D N O _ F R C : L O W L O W MODEL_OPT_0 FRC_HW_OPT NO FRC...
  • Page 29 EAN61857101 EAN61829001 IC301-*3 EAN61857201 IC301-*2 K4B1G1646G-BCH9 IC301-*4 H5TQ1G63DFR-PBC NT5CB64M16DP-CF FRC_DDR_1333_SS_NEW FRC_DDR_1600_HYNIX FRC_DDR_1333_NANYA_NEW VREFCA VREFCA VREFCA VREFDQ VREFDQ VREFDQ VCC1.5V_U3_DDR DDR3 1.5V By CAP - Place these Caps near Memory VCC1.5V_U3_DDR VDD_1 +1.5V_FRC_DDR VDD_1 A10/AP VDD_2 VDD_1 A10/AP VDD_2 VDD_3 A10/AP VDD_2 VDD_3 A12/BC...
  • Page 30 S T _ 3 . 5 V - - > 3 . 3 7 5 V - - > 3 . 4 6 V +12V/+15V FROM LIPS & POWER B/D 2 0 V - - > 3 . 5 1 V - - > 3 . 7 6 V ( 3 . 5 9 V ) + 3 .
  • Page 31 CRYSTAL_KDS X1002-*1 32.768KHz +3.5V_ST R4034 4.7K X1002 32.768KHz R4035 4.7K a_CRYSTAL_EPSON f o r D e b u g g e r R1034 4.7M +3.5V_ST +3.5V_ST P1001 12505WS-12A00 R1091 MICOM_RESET NEC_ISP_Tx TP1601 NEC_ISP_Rx C1010 0 . 1 u F OCD1A T O P S I D E f o r r e s e t .
  • Page 32 CONTROL IR & LED +3.5V_ST R2405 R2404 R2411 NEC_EEPROM_SCL P2402 12507WR-15L 5.6V C2408 18pF D2403 L2401 R2401 BLM18PG121SN1D KEY1 L2402 R2402 D2402 NEC_EEPROM_SDA BLM18PG121SN1D 5.6V R2412 5.6V KEY2 C2409 D2404 AMOTECH 18pF C2401 C2402 0 . 1 u F 0 . 1 u F D2401 5.6V AMOTECH...
  • Page 33 USB_DIODES EAN61849601 BEAD_SS IC1450 L1451-*1 AP2191DSG CIS21J121 a_BEAD_MAG +5V_USB L1451 MLB-201209-0120P-N2 $ 0 . 0 7 7 OUT_2 IN_1 120-ohm C1452 OUT_1 IN_2 C1453 R1458 R1459 10uF C1451 0 . 1 u F 1/8W 1/8W 22uF +3.3V_Normal R1455 4.7K USB1_CTL R1454 USB_JACK_LV3400 a_USB_JACK...
  • Page 34 HDMI EEPROM SIDE_HDMI HDMI_1 5V_HDMI_1 5V_DET_HDMI_1 5V_HDMI_4 5V_DET_HDMI_4 5V_HDMI_1 +5V_Normal R830 Q802 R862 HPD1 Q803 R896 2SC3052 HPD4 R897 2SC3052 a_HDMI_1_RENESAS C802 HDMI_1_ATMEL C803 IC801-*1 R804 0 . 1 u F IC801 R837 0 . 1 u F EDID_WP R1EX24002ASAS0A AT24C02BN-SH-T 1.8K 1.8K...
  • Page 35 RGB/SPDIF/PC RGB PC +5V_Normal PC AUDIO SPDIF OPTIC JACK D1115 ENKMC2838-T112 JK1102 +3.3V_Normal PEJ027-01 5 . 1 5 M s t a r C i r c u i t A p p l i c a t i o n E_SPRING T_TERMINAL1 B_TERMINAL1...
  • Page 36 RS232C R10067 IR_OUT R1123 JP1121 R1124 +3.5V_ST JP1122 D1107 D1108 CDS3C30GTH CDS3C30GTH C1101 0 . 3 3 u F SPG09-DB-009 IC1101 JK1101 C1106 MAX3232CDR 0 . 1 u F C1102 0 . 1 u F C1103 0 . 1 u F DOUT1 RIN1 C1104...
  • Page 37 [51Pin LVDS Connector] ( F o r F H D 6 0 / 1 2 0 H z ) PANEL_VCC [41Pin LVDS Connector] L702 (For FHD 120Hz ) 120-ohm P703 P704 FI-RE51S-HF-J-R1500 FI-RE41S-HF-J-R1500 42or55INCH 55INCH C700 C709 C710 10uF 1000pF 0 .
  • Page 38 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 CLose to Saturn7M IC...
  • Page 39 FLASH +3.3V_Normal +3.3V_Normal a_S_FLASH_MAIN_MACRONIX IC1401 MX25L8006EM2I-12G +3.3V_Normal C1401 /SPI_CS 0 . 1 u F SO/SIO1 HOLD# SPI_SDO SCLK /FLASH_WP SPI_SCK R1405 S I / S I O 0 SPI_SDI R1401 Q1401 KRC103S S_FLASH_MAIN_WINBOND IC1401-*1 W25Q80BVSSIG DO[IO1] HOLD[IO3] %WP[IO2] D I [ I O 0 ] THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
  • Page 40 GP2R_GLOBAL_TUNER_BLOCK +5V_TU BOOSTER : CHINA OPT RF_SWITCH_CTL P u l l - u p c a n ’ t b e a p p l i e d L3701 because of MODEL_OPT_2 BLM18PG121SN1D R3734 R3743 close to TUNER Q3701 ISA1530AC1 R3737 2.2K CONTROL_ATTEN...
  • Page 41 +1.8V_AMP +3.3V_Normal IC404 AP1117E18G-13 ADJ/GND Vd=1.4V 120 mA C434 C446 C421 0 . 1 u F 10uF 0 . 1 u F +24V SPK_L+ D501 1N4148W R519 R526 100V L506 10.0uH C536 R535 0 . 1 u F 3 . 3 C529 390pF SPEAKER_L...
  • Page 42 ETHERNET FOR DVB_T2 COMPONENT2 Rear AV +3.3V_Normal R1612 R1615 AV_CVBS_IN COMP2_DET C1643 C1648 D1613 D1619 5.6V 47pF 220pF R1654 +3.3V_Normal TP1610 ET_RXD0 [GN]E-LUG R1660 JK1604 ET_TXD0 TP1611 PPJ233-01 [GN]O-SPRING AV_CVBS_DET R1666 COMP2_Y+ [RD]E-LUG D1612 TP1612 ET_RXD1 D1624 [GN]CONTACT C1646 5.6V [RD]O-SPRING 0 .
  • Page 43 +12V/+15V Q102 L101 AO3407A MLB-201209-0120P-N2 C114 R114 C120 47uF R131 2 . 2 u F C113 R130 +3.3V_Normal JK1105 MJ-657PT-8-SD R154 RJP_CTRL0 001:AN27 R166 RJP_CTRL1 001:AN27 R167 RJP_CTRL2 001:AN26 R164 RJP_CTRL3 001:AN26 R153 RJP_CTRL4 001:AN25 THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
  • Page 44 EXT_SPEAKER OUT EXT_SPEAKER +24V +3.5V_ST BLM18PG121SN1D JK1990 L1980 +3.3V_Normal IC1900 PEJ027-01 C1900 NL17SZ08DFT2G 0 . 1 u F E_SPRING 004:AN28;005:Z8;016:T13 R1900 R1990 T_TERMINAL1 POWER_DET 100K C10063 C10064 R1901 C1905 0 . 1 u F 10uF B_TERMINAL1 R1991 22uF C1909 POWER_ON/OFF1 0 .
  • Page 45 SMD GASKET THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. GP2R 20101023 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR SMD_GAS THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. ©...
  • Page 46 +3.3V_Normal +3.3V_Normal P2100 12507WR-08L R2102 R2103 L/DIM_SCLK L/DIM_MOSI R4029 LED_DRIVER_D/L_SCL R4028 LED_DRIVER_D/L_SDA V_SYNC C2100 C2101 C2102 C2103 C2104 18pF 18pF 18pF 18pF 18pF THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. GP2R 20101023 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR L/DIM_LED...

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