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LG 22LV2500-DG Service Manual
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LG 22LV2500-DG Service Manual

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LED LCD TV
SERVICE MANUAL
CHASSIS : LT01R
MODEL : 22LV2500
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67140402 (1108-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
22LV2500-DG
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 22LV2500-DG

  • Page 1 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 : LT01R MODEL : 22LV2500 22LV2500-DG CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67140402 (1108-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 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 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

    LCD Module(LGD) 19”(AUO) 430.4 X 254.6 X 9.9 22”(CMI) 495.6 X 292.2 X 11.5 22”(AUO) 495.6 X 292.2 X 10.3 Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 All white/ All black White 0.313 0.329 - 0.03 0.635 +0.03 CIE Color Coordinates 0.349 Green 0.332 0.619 Blue 0.155 0.055 Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 WXGA 1360*768 47.72 59.8 84.75 WXGA 1280*1024 63.595 60.0 108.875 SXGA FHD model 1920*1080 66.587 59.93 138.625 WUXGA FHD model Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 84.75 WXGA HDCP 1280*1024 63.981 60.02 108.00 SXGA HDCP / FHD Model 1920*1080 67.5 148.5 WUXGA HDCP / FHD Model Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Adjustment Instruction

    -> If you push “Power on” key, TV set will recover channel information by itself. (8) ……….OK 3. After function inspection, Push “In-stop” key. Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 * Required equipment : Adjustment R/C 32LV3500-DG_LGD 18272 19478 55337 26904 32LV3500-DG_AUO 18280 19478 55337 26904 42LV3400-DG_LGD 26592 9226 53289 26904 42LV3300-DG_AUO 9226 53289 26904 Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 For correct it to the model’s module from factory JIG model. # Push The “IN STOP KEY” after completing the function inspection. And Mechanical Power Switch must be set “ON”. Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 · Enter “START’ by pushing “OK” key. HDMI number is dependent on model. (2) FHD HDMI 1 EDID Data (CS : E299) Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 (6) SMALL FHD HDMI 1 EDID Data (CS : E24F) (7) SMALL FHD HDMI 2 EDID Data (CS : E23F) (12) HD HDMI3 EDID Data (CS : B445) Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 - If Test is failed, Buzzer operate - If Test is passed, GOOD Lamp on and move to next process automatically. 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 IC102 NAND01GW3B2CN6E NAND FLASH MEMORY +3.3V_Normal +3.3V_Normal <CHIP Config(LED_R/BUZZ)> NC_1 NC_29 Boot from SPI CS1N(EXT_FLASH) 1’b0 NAND_FLASH_1G_NUMONYX NC_2 NC_28 EAN60762401 IC101 Boot from SPI_CS0N(INT_FLASH) 1’b1 PCM_A[0-7] LGE2112-T8 NC_3 NC_27 NC_4 NC_26 PCM_D[0-7] AR101 S7LR_DIVX_MS10 NC_5 I/O7 PCM_A[7] PCM_D[0] PCM_D[1] PCMDATA[0]/GPIO126 AA18 NC_6 I/O6...
  • Page 18 +3.3V_Normal MODEL OPTION PIN NAME PIN NO. HIGH MODEL OPTION +1.10V_VDDC +1.10V_VDDC VDDC 1.05V MODEL_OPT_0 VDDC : 2026mA MODEL_OPT_1 PHM_OFF PHM_ON MODEL_OPT_2 NON_DVB_T2 DVB_T2 MODEL_OPT_3 NON_3D R201 IF_AGC_SEL MODEL_OPT_0 R202 BOOSTER_OPT MODEL_OPT_4 LNA2_CTL MODEL_OPT_1 NON_OLED OLED R203 RF_SW_OPT RF_SWITCH_CTL MODEL_OPT_2 R204 MODEL_OPT_5 NON_DVB_S...
  • Page 19 CONTROL IR & LED +3.5V_ST EYEQ/TOUCH_KEY R2405 R2411 R2404 EYEQ/TOUCH_KEY OLD_SUB NEW_SUB SENSOR_SCL P2401 P2402 12507WR-12L 12507WR-15L 5.6V C2408 18pF D2403 L2401 R2401 BLM18PG121SN1D KEY1 EYEQ/TOUCH_KEY EYEQ/TOUCH_KEY R2402 L2402 D2402 SENSOR_SDA BLM18PG121SN1D 5.6V R2412 5.6V KEY2 C2409 D2404 AMOTECH 18pF C2401 C2402 0.1uF...
  • Page 20 USB_DIODES EAN61849601 IC1450 L1451-*1 AP2191DSG CIS21J121 +5V_USB L1451 MLB-201209-0120P-N2 $0.077 OUT_2 IN_1 120-ohm C1452 OUT_1 IN_2 C1453 R1458 R1459 10uF 0.1uF C1451 1/8W 1/8W 22uF +3.3V_Normal R1455 4.7K USB1_CTL USB_JACK R1454 USB_JACK_LV3400 R1451 47 USB1_OCD JK1450-*1 JK1450 SIDE_USB_DM SIDE_USB_DP D1451 RCLAMP0502BA SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
  • Page 21 HDMI EEPROM 5V_HDMI_1 +5V_Normal ENKMC2838-T112 D821 HDMI_1_RENESAS HDMI_1_ATMEL 5V_HDMI_1 5V_DET_HDMI_1 HDMI_1 IC801-*1 IC801 EDID_WP R1EX24002ASAS0A R806 AT24C02BN-SH-T SHIELD R896 $0.055 C806 R884 R888 Q802 R830 C802 HPD1 0.1uF 2.7K 2.7K 2SC3052 R804 0.1uF 1.8K DDC_SCL_1 R876 DDC_SDA_1 DDC_SDA_1 R875 DDC_SCL_1 R805 HDMI_ARC 5V_HDMI_2...
  • Page 22 RGB/SPDIF/PC/HP New Item Development EARPHONE BLOCK HP_LOUT C1118 002:V7 10uF C1115 HEAD_PHONE 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 C1119 002:V7 10uF C1116 1000pF Q1102 R1128 MMBT3904-(F) MMBT3904-(F) Q1103 R1129 3.3K SIDE_HP_MUTE Q1106 2SC3052 RGB PC +5V_Normal...
  • Page 23 RS232C R1123 JP1111 R1124 +3.5V_ST JP1112 D1107 D1108 CDS3C30GTH CDS3C30GTH C1101 0.33uF SPG09-DB-009 IC1101 JK1101 C1106 MAX3232CDR 0.1uF C1102 0.1uF C1103 0.1uF DOUT1 RIN1 C1104 0.1uF ROUT1 PM_RXD DIN1 PM_TXD C1105 0.1uF DOUT2 DIN2 RIN2 ROUT2 EAN41348201 SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
  • Page 24 AVDD_DDR0 AVDD_DDR0 AVDD_DDR1 AVDD_DDR1 DDR3 1.5V By CAP - Place these Caps near Memory AVDD_DDR1 +1.5V_DDR DDR3 1.5V By CAP - Place these Caps near Memory +1.5V_DDR AVDD_DDR0 L1203 L1202 BLM18PG121SN1D BLM18PG121SN1D A-MVREFDQ A-MVREFCA B-MVREFDQ B-MVREFCA C1252 10uF Close to DDR Power Pin Close to DDR Power Pin CLose to Saturn7M IC CLose to DDR3...
  • Page 25 +3.5V_ST +3.5V_ST S_FLASH_MAIN_MACRONIX IC1401 MX25L8006EM2I-12G +3.5V_ST C1401 /SPI_CS 0.1uF SO/SIO1 HOLD# SPI_SDO SCLK /FLASH_WP SPI_SCK R1405 SI/SIO0 SPI_SDI R1401 Q1401 KRC103S S_FLASH_MAIN_WINBOND IC1401-*1 W25Q80BVSSIG DO[IO1] HOLD[IO3] %WP[IO2] DI[IO0] SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP3_S7LR 20110324...
  • Page 26 GP4R_GLOBAL_TUNER_BLOCK +5V_TU BOOSTER : CHINA OPT RF_SWITCH_CTL Pull-up can’t be applied L3701 BOOSTER_OPT because of MODEL_OPT_2 BLM18PG121SN1D BOOSTER_OPT R3734 BOOSTER_OPT R3743 Q3701 BOOSTER_OPT ISA1530AC1 TU3702 TU3701 R3737 2.2K TDTJ-S001D TDFR-C036D +3.3V_TU +5V_TU BOOSTER_OPT DVB_1INPUT_H_LGIT CN_2INPUT_H_LG3911 R3745 BOOSTER_OPT Q3702 FE_BOOSTER_CTL 2SC3052 LNA2_CTL +3.3V_BUFFER +5V_BUFFER...
  • Page 27 +3.3V_Normal AMP_RESET R521 C516 1000pF L502 +24V_AMP BLM18PG121SN1D R507 AUD_MASTER_CLK +24V_AMP +24V C525 C519 C521 C523 0.01uF 0.1uF 0.1uF 10uF C515 C514 10uF 0.1uF L501 SPK_L+ MLB-201209-0120P-N2 D501 1N4148W R508 R515 L505 100V R516 10.0uH C537 0.1uF C510 C512 4.7K C501 C502 C530...
  • Page 28 Rear AV COMPONENT2 AV_CVBS_IN +3.3V_Normal REAR_AV C1643 C1648 D1619 47pF 220pF R1654 R1612 R1615 +3.3V_Normal REAR_AV REAR_AV COMP2_DET R1660 D1613 JK1604 5.6V REAR_AV PPJ233-01 AV_CVBS_DET R1666 [RD]E-LUG D1624 REAR_AV C1646 5.6V [GN]E-LUG [RD]O-SPRING 0.1uF R1619 REAR_AV [GN]O-SPRING [RD]CONTACT L-MONO COMP2_Y+ D1612 REAR_AV R1685...
  • Page 29 * Option name of this page : CI_SLOT (because of Hong Kong) CI Region CI SLOT +5V_CI_ON CI TS INPUT CI_DATA[0-7] AR1905 FE_TS_DATA[7] CI_MDI[7] +5V_Normal FE_TS_DATA[6] C1906 CI_MDI[6] FE_TS_DATA[5] 10uF CI_MDI[5] FE_TS_DATA[4] EAG41860102 CI_MDI[4] AR1906 P1901 FE_TS_DATA[3] CI_MDI[3] P1902 /CI_CD1 FE_TS_DATA[2] 10067972-000LF 10067972-050LF...
  • Page 30 6.5T_GAS 12.5T_GAS 9.5T_GAS 8.5T_GAS 7.5T_GAS 5.5T_GAS DO_NOT_APPLY MDS62110206 MDS62110209 MDS61887708 MDS62110214 MDS62110205 MDS62110204 GAS1-*6 GAS1-*5 GAS1-*4 GAS1-*3 GAS1-*2 GAS1-*1 6.5T_GAS 12.5T_GAS 9.5T_GAS 8.5T_GAS 7.5T_GAS 5.5T_GAS DO_NOT_APPLY MDS62110206 MDS62110209 MDS61887708 MDS62110214 MDS62110205 MDS62110204 GAS2-*6 GAS2-*5 GAS2-*4 GAS2-*3 GAS2-*2 GAS2-*1 6.5T_GAS 12.5T_GAS 9.5T_GAS 7.5T_GAS 8.5T_GAS...
  • Page 31 LED driver circuit for TN module D10001 L10001 PDS5100H-13 +24V_LED_driver 33uH R10012 C10001 C10002 C10012 C10014 C10016 C10018 C10020 C10022 C10005 C10021 2.2uF 2.2uF R10018 2.2uF 10uF 10uF 2.2uF 2.2uF 10uF 0.1uF 0.1uF 100V C10010 R10015 560K 100V 100V 100V 100V 100V 1000pF...
  • Page 32 LVDS_SMALL_TN A_DIM RXA4+ RXA4- RXB4- [30Pin FHD LVDS Connector] RXB4+ (For FHD 60Hz_Small) [30Pin HD LVDS Connector] PANEL_VCC (For HD 60Hz_Small) PANEL_VCC P3000 P3001 FF10001-30 L3000 FF10001-30 FHD_21.5 120-ohm L3001 HD_18.5 FHD_21.5 120-ohm HD_18.5 [30] [30] [29] [29] C3000 C3001 C3002 [28] C3003...
  • Page 33 +3.3V_Normal +5V_Normal 24V-->3.48V +24V/+15V +24V_LED ST_3.5V-->3.5V --> 3.375V +3.5V_ST +24V/+15V R180 PANEL_POWER R7561 100K R181 JK7500 PANEL_VCC_0.01uF IC7509-*1 JPD003N-M432-4F C7529 IC7509 C7504 C7525 C7526 APX803D29 L7912 10uF (LIPS : 3.9K) L7504 MLB-201209-0120P-N2 0.015uF 0.01uF 0.1uF NCP803SN293 4A -> 3A modify 090916 Not used : Q7506 R7582...
  • Page 35 LVDS 출력 Block LVDS 출력 Block POWER Block POWER Block Trouble Shooting Trouble Shooting LG Electronics/ LCD TV Division LCD TV Gr. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 36 Digital Audio SPDIF NTP7100L (Optic) I2C(SCL/SDA) RS-232C RX/TX RX/TX MAX3232 Micom (CTRL./SVC) Reset Switch S/W Reset (UPD78F0514) DP/DM/ +5V 24MHz X-tal Copyright ⓒ 2011 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_I CVBS1P RXC2N Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 38 AUR1 & S7MR (LGE107) 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 ⓒ 2011 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 +3.3V PF_ALE PF_ALE +3.5V_ST /PF_WE /PF_WE PF WP SOC_RESET Micom HWRESET PF_AD15 (UPD78F0514) Reset Switch Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 40 22 ohm DDCA_DA IC1105 0ohm 0 ohm +5V_Gen. EEPROM EEPROM DDCDA_CK/DDCDC_CK 22 ohm (AT24C512BW) DDC_SCL/SDA AT24C02BN8 DDCDA_DA/DDCDC_DA 22 ohm IC1001 IC801/IC802/IC804 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 41 GPIO147/TCON4 & S7MR(LGE107) S7_RXD UART_RX2 RS232C R2619 S7_TXD (MAX3232CDR) UART_TX2 HP_DET R2618 GPIO 8/PM2 USB_DM USB_DM1 JK1450 USB_DP USB_DP1 (USB JACK) Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 42 WIRELESS_DL_TX MPIF_CLK GPIO36/UART3_RX WIRELESS_DL_RX PM_SPI_DO/GPIO3 SPI_SDO GPIO151/TCON8 SIDEAV_DET PM_SPI_DI/GPIO2 SPI_SDI GPIO149/TCON6 5V_DET_HDMI_3 GPIO0/PM_SPI_CZ GPIO147/TCON4 5V_DET_HDMI_4 PM_SPI_CK/GPIO1 SPI_SCK GPIO145/TCON2 5V_DET_HDMI_2 GPIO143/TCON0 5V_DET_HDMI_1 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 43 AUDIO AMP AMP_MUTE ( NTP7100L) Micom (UPD78F0514) NEC_RXD RXD0 IC1002 RS232C R2619 NEC_TXD (MAX3232CDR) TXD0 R2618 KEY1 ANI6 KEY2 ANI7 INTP5 Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 44 W I R E L E S S _ D E T E C T R E S E T M I C O M _ R E S E T Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 45 OUT Block LVDS TXB0+/- LVDS TXB1+/- P704(41pin) LVDS Wafer LVDS TXB2+/- (FHD, 120Hz) LVDS TXBC+/- 120Hz OPT LVDS TXB3+/- LVDS TXB4+/- Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 46 Main SOC S7(LGE101D) & S7 T(LGE105) IC407 +1.5V_DDR TPS54319 (DCDC)3A IC1, IC2 H5PS5162FFR-S6C DDR2 IC1101 MAX3232CDR (RS-232C) IC408 APX803D Power_DET (RESET IC) Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 47 (#17,19,21) USB JACK (DCDC)3A (OPC) IC405 +3.3V_Normal AOZ1073AIL (DCDC)3A IC406 +5V_Normal AOZ1072AIL (DCDC)2A Q409 PANEL_VCC AO3407A P703/P705 (FET) IC408 Power_DET APX803D Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 48 IC501 NTP7100 IC404 +1.8V_AMP IC501 AZ1117H-1.8TRE1 NTP7100 TU6600 +3.3V_TU TDVJ-H001F L3703 Tuner IC402 +2.5V_Normal AZ2940D-2.5TRE1 IC100 Main SOC S7R(LGE101) & S7MR(LGE107) Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 49 +5V_Norm AOZ1072AI AT24C02BN L422 For HDMI (DCDC)2A EDID EEPROM IC1105 AT24C02BN For RGB PC EDID EEPROM TU3702 +5V_TU TDTR-T036F L3702 Tuner Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 50 Check Inverter Control & Error Out P404 18 pin : High Check Power Board or Module P404 *24 pin : low Change Module Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 51 Replace Tuner Check IF_P/N Signal Bad Tuner. Replace Tuner. TU5001 17/18 Pin Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 52 Replace Tuner Check Tuner No 11 pin Bad Tuner. Replace Tuner. (CVBS signal) Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 53 Y/PB/PR signal Line Check COMP_DET Signal Replace R1612 or R1615 or R1613,R1614 Check Mstar LVDS Output Replace Mstar(IC100) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 54 Check JK1104 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 ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 55 Check HDMI Signal Replace Main Board If no problem, check signal line Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 56 1, 2, 3, 4 pin. Replace connector Check Speaker cable if found to be damaged. Check speaker. Replace speaker if found to be damaged. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 57 Replace Tuner Check IF_P/N Signal Bad Tuner. Replace Tuner. TU5001 17/18 Pin Check Mstar LVDS Output Replace Mstar(IC101) or Main Board. Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 58 Replace Tuner Check Tuner No 9 Bad Tuner. Replace Tuner. (SIF) Check Q3709 Replace Q3709 TR Replace the IC101 or main b;d Copyright ⓒ 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 59 Check JK1102 & Audio 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...

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22lv2500