LG 32LB628U-ZB Service Manual Download Page 44

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Check various

voltages of Power

Board ( 3.5V,12V, 24V)

Replace Power

Board and repair

parts

Standard Repair Process

A. Video error

No video/ No audio

☞

Established
date

Revised date

2/14

LCD TV

Error
symptom

2012 . 01 .14

End

Normal

Voltage

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 32LB628U-ZB

Page 1: ...ODEL 32LB628U 32LB628U ZB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...lectronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 BLOCK DIAGRAM 17 EXPLODED VIEW 19 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed m...

Page 4: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent e...

Page 5: ...he solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replace...

Page 6: ...K Italy Germany France Spain Sweden Finland Netherlands Belgium Luxemburg Greece Denmark Czech Austria Hun gary Swiss Croatia TurkeyNorway Slovenia Poland Ukraine Portugal Ireland Morocco Latvia Estonia Lithania Rumania Bulgaria Russia SlovakiaBosnia Serbia Albania Kazakhstan Belarus DTV MPEG2 4 DVB T2 8 countries UK Denmark Sweden Finland Norway Ireland Ukraine Kaza khstan DTV MPEG2 4 DVB C 37 co...

Page 7: ... 5 6 DVB C Symbolrate 4 0Msymbols s to 7 2Msymbols s Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S symbolrate DVB S2 8PSK QPSK 2 45Msymbol s DVB S QPSK 2 45Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 4 Scart Jack 1EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT analog 5 Component AV Common port 1EA Video Input RCA PAL SECAM NTSC 4 Sy...

Page 8: ... 74 25 HDTV 1080P 19 1920 1080 33 71 29 97 74 176 HDTV 1080P 5 2 HDMI Input PC DTV No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark PC DVI DDC 1 640 350 31 468 70 09 25 17 EGA X 2 720 400 31 469 70 08 28 32 DOS O 3 640 480 31 469 59 94 25 17 VESA VGA O 4 800 600 37 879 60 31 40 00 VESA SVGA O 5 1024 768 48 363 60 00 65 00 VESA XGA O 6 1152 864 54 348 60 053 80 00 VESA O 7 1360 76...

Page 9: ... 25 HDTV 1080i Side by Side half Top and Bottom 9 1920 1080 28 125 50 74 25 HDTV 1080i Side by Side half Top and Bottom 10 1920 1080 27 24 74 25 HDTV 1080P Side by Side half Top and Bottom 11 1920 1080 33 7 30 89 1 HDTV 1080P Side by Side half Top and Bottom 6 2 RF 3D Input DTV No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 3D input proposed mode 1 1280 720 37 500 50 74 25 HDTV 720P S...

Page 10: ...eck connection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High USB data is automatically detecting 3 Show the message Copying fi...

Page 11: ... 00 00 00 00 00 00 00 00 00 00 00 00 00 e 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D a b 10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30 50 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A 60 3E 1E 53 10 00 0A 20 20 20 20 20 20...

Page 12: ... 0 75 41 41 Block 1 5B HDMI1 25 HDMI1 23 HDMI1 4B HDMI2 15 HDMI2 13 HDMI2 INPUT Model name HEX _2D Model name HEX _3D HDMI1 67030C001000801E 78030C001000801E HDMI2 67030C002000801E 78030C002000801E Mode Temp Coordinate spec Target Cool 13 000 K X 0 271 0 002 Y 0 270 0 002 X 0 275 Y 0 276 Medium 9 300 K X 0 285 0 002 Y 0 293 0 002 X 0 289 Y 0 299 Warm 6 500 K X 0 313 0 002 Y 0 329 0 002 X 0 317 Y 0...

Page 13: ... gain more than 172 Adjust R Gain and B Gain less than 192 2 If the G gain value be adjusted down to 172 One of the R B Gain is 254 3 If G Gain is 172 More than one of R B Gain is to be between 192 254 CASE Medium Warm First adjust the coordinate far away from the target value x y 1 x y target i Decrease the R G 2 x y target i First decrease the B gain ii Decrease the one of the others 3 x target ...

Page 14: ...SIGNAL cable insertion condition 5 2 HI POT auto check 1 Pallet moves in the station POWER CORD AV CORD is tightly inserted 2 Connect the AV JACK Tester 3 Controller GWS103 4 on 4 HI POT test Auto If Test is failed Buzzer operates If Test is passed GOOD Lamp on and move to next proc ess automatically 5 3 Checkpoint 1 Test voltage Touchable Metal 3 KV min at 100 mA SIGNAL 3KV min at 100 mA 2 TEST t...

Page 15: ...start key of Adjustment remote control 2 Go to the menu 6 Model Number D L like below photo 3 Input the Factory model name or Serial number like photo 4 Check the model name Instart menu Factory name displayed ex 47LB560V ZA 5 Check the Diagnostics DTV country only Buyer model displayed ex 47LB560V ZA 7 MAC Address CI key download 7 1 MAC Address 7 1 1 Equipment Condition Play file Serial exe MAC ...

Page 16: ... Mode of TV Setting automatic IP Setting state confirmation If automatic setting is finished you confirm IP and MAC Address 7 3 LAN PORT INSPECTION PING TEST Connect SET LAN port PC LAN Port 7 3 1 Equipment setting 1 Play the LAN Port Test PROGRAM 2 Input IP set up for an inspection to Test Program IP Number 12 12 2 2 7 3 2 LAN PORT inspection PING TEST 1 Play the LAN Port Test Program 2 Connect e...

Page 17: ... 128MB built in Only 3D IC101 Connector P4600 KEY1 2 LED_R IR REAR HDMI1 JK800 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 SIDE USB JK700 HDMI2 MHL JK801 CK D0 D1 D2 _HDMI4 DDC_SCL SDA_4 HDMI_CEC SIDE_USB_DM DP USB1_OCP CTL TPS65282 5V_USB MHL_CD_SENSE HP_L ROUT SIDE_HP_MUTE Headphone JK3000 DDR3 SDRAM 1Gbit IC1201 B MDQL 0 7 B MDQU 0 7 AVDD5V_MHL MHL_OCP CI Slot P1900 NAND FLASH IC102 1Gbit H27U1...

Page 18: ...IC3401 Main SOC M1A 128MB Built in IC101 Connector P4600 KEY1 2 LED_R IR REAR HDMI1 JK4200 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 USB JK700 HDMI2 MHL JK4201 CK D0 D1 D2 _HDMI4 DDC_SCL SDA_4 HDMI_CEC SIDE_USB_DM DP USB1_OCP CTL TPS65282 5V_USB MHL_CD_SENSE HP_L ROUT SIDE_HP_MUTE Headphone JK3000 DDR3 SDRAM 1Gbit IC1201 B MDQL 0 7 B MDQU 0 7 TU_SCL SDA H NIM IF_P IF_N IF_AGC AVDD5V_MHL MHL_OCP ...

Page 19: ...and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPO...

Page 20: ... 0 C410 10uF 10V ZD403 2 5V ZD401 2 5V R456 0 OPT C432 4 7uF 50V 3216 24V_CAP C400 1uF 10V 1005 OPT 24V R457 8 2K 1 OPT R458 0 5 OPT R438 4 7K OPT C407 10uF 10V 2012 IC401 APX803D29 1 GND 3 VCC 2 RESET IC402 APX803D29 OPT 1 GND 3 VCC 2 RESET C434 390pF 50V C419 0 039uF 50V C423 270pF 50V C435 0 1uF 16V C418 0 01uF ZD404 5V 3 5V_POWER_DET 3 5V_POWER_DET 3 5V_POWER_DET 3 3V_Normal VBUS_EN MHL_OCP_EN...

Page 21: ...TURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 13 04 30 USB_S1 7 L14_M1A JK700 3AU04S 305 ZC LG 1 2 3 4 5 D700 RCLAMP0502BA OPT SIDE_USB1_DM SIDE_USB1_DP C700 22uF 10V ZD700 5V OPT SD05 C701 5pF 50V OPT C702 5pF 50V OPT C703 22uF 10V OPT 5V_USB USB SIDE Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Int...

Page 22: ...DMI2 JK801 EAG62611204 HDMI 2 14 NC 13 CE_REMOTE 5 D1_GND 20 GND 12 CK 11 CK_GND 2 D2_GND 19 HP_DET 18 5V 10 CK 4 D1 1 D2 17 GND 9 D0 8 D0_GND 3 D2 16 DDC_DATA 7 D0 6 D1 15 DDC_CLK D803 2 RCLAMP0524PA ESD_HDMI1_SEMTECH 1 8 2 7 3 6 4 5 9 10 D804 2 RCLAMP0524PA ESD_HDMI1_SEMTECH 1 8 2 7 3 6 4 5 9 10 D806 2 RCLAMP0524PA ESD_HDMI2_SEMTECH 1 8 2 7 3 6 4 5 9 10 D805 2 RCLAMP0524PA ESD_HDMI2_SEMTECH 1 8 ...

Page 23: ...BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SPDIF 2013 05 15 10 NC5_L14 3 3V_Normal SPDIF_OUT JK1001 JST1223 001 1 GND 2 VCC 3 VINPUT 4 FIX_POLE C1001 1uF 10V OPT C1002 68pF 50V SPDIF_CAP_68pF C1002 1 47pF 50V SPDIF_CAP_47pF SPDIF OPTIC JACK 5 15 Mstar Circuit Application SPDIF ESD Ready Copyright 2014 LG Electronics Inc All rights reserved Only for training and service...

Page 24: ... VSSQ_3 D1 VSSQ_4 D8 VSSQ_5 E2 VSSQ_6 E8 VSSQ_7 F9 VSSQ_8 G1 VSSQ_9 G9 IC101 LGE2132 M1A_256M M1A_256M B_DDR3_A 0 E11 B_DDR3_A 1 F12 B_DDR3_A 2 D10 B_DDR3_A 3 B10 B_DDR3_A 4 E15 B_DDR3_A 5 B11 B_DDR3_A 6 F14 B_DDR3_A 7 C11 B_DDR3_A 8 D14 B_DDR3_A 9 A12 B_DDR3_A 10 F16 B_DDR3_A 11 D13 B_DDR3_A 12 D15 B_DDR3_A 13 C12 B_DDR3_A 14 E13 B_DDR3_BA 0 A9 B_DDR3_BA 1 D16 B_DDR3_BA 2 A10 B_DDR3_MCLK C13 B_DD...

Page 25: ...S_FLASH 2013 04 29 13 NC5_S7LR M1A SPI_SCK 3 5V_ST 3 5V_ST C1300 0 1uF R1301 4 7K OPT SPI_CS SPI_SDO IC1300 MX25L8006EM2I 12G SPI_FLASH_MACRONIX 3 WP 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 HOLD 8 VCC R1302 33 R1300 10K OPT SPI_SDI FLASH_WP IC1300 1 W25Q80BVSSIG SPI_FLASH_WINBOND 3 WP IO2 2 DO IO1 4 GND 1 CS 5 DI IO0 6 CLK 7 HOLD IO3 8 VCC 3 5V_ST Serial Flash for SPI boot Copyright 2014 LG Electr...

Page 26: ... URSA VCOM_SDA URSA VCOM_SCL VCOM_SDA RXB1 RXB0 RXA4 RXA1 Pol change RXB4 RXACK RXBCK RXA0 RXA2 LVDS_EU RXA2 RXBCK RXB4 RXA3 RXA1 RXB2 RXB3 RXA3 RXBCK RXACK RXA2 RXA1 RXB1 RXB3 RXA3 RXA2 RXA0 RXA4 Shift RXBCK RXB2 RXA4 51Pin LVDS Connector For FHD 60Hz RXACK RXA3 RXACK RXB3 RXA3 RXA1 RXB0 RXA0 RXACK RXB3 LVDS_SEL RXA4 RXB3 RXA4 RXA2 RXA2 RXA1 RXB2 Pol change RXB4 RXB1 RXA4 RXACK RXB3 RXB0 RXB3 RXB...

Page 27: ...R1906 33 C1903 10uF 10V PCM_A 12 CI_ADDR 12 CI_MISTRT AR1903 33 CI_MCLKI PCM_A 9 IC1900 74LVC1G32GW OR_GATE_CI_PHILIPS 3 GND 2 A 4 Y 1 B 5 VCC CI_TS_CLK C1901 0 1uF GND CI_ADDR 10 AR1907 33 AR1904 33 CI_IORD CI_TS_DATA 4 CI_MDI 5 CI_MDI 3 AR1900 33 R1911 10K R1913 10K PCM_REG R1919 10K PCM_RST AR1901 33 R1908 10K CI_MCLKI FE_TS_DATA 0 7 PCM_D 0 7 R1912 100 PCM_A 7 CI_MDI 1 PCM_A 10 CI_TS_VAL CI_MD...

Page 28: ...ECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LAN 2013 04 29 21 NC5_M1A EPHY_RN EPHY_TN EPHY_TP EPHY_RP C2104 0 01uF 50V ETHERNET JK2100 RJ45VT 01SN002 ETHERNET 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 C2105 0 01uF 50V ETHERNET ETHERNET H W option ETHERNET Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use...

Page 29: ...V LNB A_GND R2704 33 LNB D2702 30V MBR230LSFT1G LNB LNB_TX C2706 10uF 25V LNB 12V C2713 0 22uF 25V LNB L2701 BLM18PG121SN1D LNB LNB_OUT C2711 0 22uF LNB L2702 15uH SP 7850_15 LNB DEMOD_SCL DEMOD_SDA C2701 18pF LNB C2714 18pF LNB C2702 33pF LNB R2703 36K 1 16W 1 LNB R2706 0 IC2701 A8303SESTR T LNB 1 VCP 3 NC_1 7 SCL 9 ADD 10 TONECTRL 11 TCAP 12 ISET 13 VREG 14 GND 15 VIN 16 LX 17 GNDLX 18 NC_2 19 N...

Page 30: ...uF SCART_MUTE R2838 2K SCART_MUTE R2837 2K SCART_MUTE R2845 10K SCART_MUTE MMBT3904 NXP Q2803 SCART_MUTE MMBT3904 NXP Q2802 SCART_MUTE VA2807 5 5V ESD_SCART R2807 75 R2805 75 R2808 75 R2813 75 EU AV2_L_IN R2847 0 AV2 SC1 AV2_CVBS_IN AV2_R_IN JK2803 PPJ231 01 AV2 8 6 7 5 4 R2848 0 EU AV2_CVBS_DET AV2_L_IN_A AV2_R_IN_A AV2_CVBS_DET C2814 1000pF 50V EU C2813 1000pF 50V EU VA2816 5 6V OPT R2814 1K R28...

Page 31: ...3V_Normal R3005 10K HEAD_PHONE C3003 1000pF 50V OPT HP_LOUT R3004 1K HEAD_PHONE HP_DET 3 5V_ST HP_ROUT SIDE_HP_MUTE R3002 1K HEAD_PHONE C3002 1000pF 50V OPT R3003 1K HEAD_PHONE Q3002 MMBT3904 NXP OPT E B C Q3003 MMBT3904 NXP OPT E B C Q3005 MMBT3904 NXP OPT E B C Q3004 MMBT3904 NXP OPT E B C Q3001 MMBT3906 NXP OPT E B C Q3000 MMBT3904 NXP OPT E B C R3000 1K OPT C3004 4 7uF 10V HEAD_PHONE L3001 HEA...

Page 32: ...R3736 0 T2_OR_CHINA R3726 0 OPT R3734 22K 1 T2_OR_CHINA R3735 220 CHINA R3728 82 CHINA R3717 1K TU_NON_ATSC R3709 10 TU_NON_ATSC R3710 10 TU_NON_ATSC R3737 1 T2_OR_CHINA C2603 0 1uF 16V RF_SW_OPT R2603 0 RF_SW_OPT RF_SWITCH_CTL R3733 12K 1 T2_OR_CHINA C3725 1uF 10V T2_OR_CHINA R3707 0 T2_OR_CHINA C3709 0 1uF 50V T2_OR_CHINA TU_GND_B C3712 1000pF 630V CHINA TU_GND_A TU_GND_A TU_GND_A TU_GND_A R3720...

Page 33: ...MBOL MARK OF THE SCHEMETIC RS232C_MSTAR_DEBUG_4P 2013 04 30 40 L14_S7LR M1A PM_RXD 3 5V_ST R4001 100 R4000 100 P4000 12507WS 04L RS232C_DEBUG_4P 1 VCC 2 PM_RXD 3 GND 4 RM_TXD 5 GND PM_TXD JP_GND3 RGB_DDC_SCL JP_GND4 RGB_DDC_SDA JP_GND1 JP_GND2 P4001 12505WS 04A00 MSTAR_DEBUG_4P 1 2 3 4 5 RS 232C 4PIN MSTAR DEBUG 4PIN RS 232C 4PIN MSTAR DEBUG 4PIN Copyright 2014 LG Electronics Inc All rights reserv...

Page 34: ... THE SCHEMETIC 2013 04 29 TP_EU 41 NC5_M1A CI_DET DDC_SCL_2 CI_CD1 SIDE_HP_MUTE HP_DET CK _HDMI2 SPDIF_OUT HDMI_ARC D0 _HDMI2 D1 _HDMI2 HP_ROUT D0 _HDMI2 HP_LOUT EPHY_RN EPHY_RP 5V_DET_HDMI_2 HPD2 EPHY_TP AV2_CVBS_DET D2 _HDMI2 EPHY_TN SENSOR_SDA FRC_RESET D1 _HDMI2 IF_AGC_SEL SENSOR_SCL D2 _HDMI2 CK _HDMI2 DEMOD_RESET DDC_SDA_2 CI_CD2 RF_SWITCH_CTL TP for EU Copyright 2014 LG Electronics Inc All ...

Page 35: ...R4608 100 Digital Eye R4600 3 3K R4607 1K Digital Eye C4603 0 1uF 16V OPT KEY1 3 5V_ST R4601 100 C4601 1000pF 50V KEY2 VA4600 LED_R_Zener R4604 10K 1 C4604 100pF 50V R4605 1K Digital Eye SENSOR_SDA 3 3V_Normal P4601 12507WR 08L OPT 1 2 3 4 5 6 7 8 9 C4602 0 1uF 16V OPT L4600 BLM18PG121SN1D C4605 18pF 50V OPT 3 5V_ST IR R4609 100 Digital Eye 3 5V_ST R4606 1 8K SENSOR_SCL P4600 12507WR 10L 1 2 3 4 5...

Page 36: ...IO131 U18 PCMDATA 1 GPIO132 V16 PCMDATA 2 GPIO133 W17 PCMDATA 3 GPIO125 Y20 PCMDATA 4 GPIO124 R15 PCMDATA 5 GPIO123 AA18 PCMDATA 6 GPIO122 T15 PCMDATA 7 GPIO121 Y21 PCMIORD_N GPIO116 W20 PCMIOWR_N GPIO114 V21 PCMIRQA_N GPIO110 Y18 PCMOE_N GPIO118 T16 PCMREG_N GPIO128 R17 PCM_RESET GPIO134 T18 PCMWAIT_N GPIO105 W16 PCMWE_N GPIO198 U15 TS0CLK GPIO92 V10 TS0DATA 0 GPIO82 T14 TS0DATA 1 GPIO83 T13 TS0D...

Page 37: ...13 GND_41 H14 GND_42 H15 GND_43 H16 GND_44 H17 GND_45 H18 GND_46 J7 GND_47 J8 GND_48 J9 GND_49 J10 GND_50 J11 GND_51 J12 GND_52 J13 GND_53 J14 GND_54 K8 GND_55 K10 GND_56 K11 GND_57 L10 GND_58 M5 GND_59 M7 GND_60 M8 GND_61 M9 GND_62 M10 GND_63 N4 GND_64 N5 GND_65 N6 GND_66 N7 GND_67 N8 GND_68 N9 GND_69 N10 GND_70 P4 GND_71 P5 GND_72 P6 GND_73 P7 GND_74 P9 GND_75 P10 GND_76 P15 GND_77 P16 GND_78 P1...

Page 38: ... SSTIMER 7 NC_2 8 PBTL 9 AVSS 10 PLL_FLTM 11 PLL_FLTP 12 VR_ANA 13 AVDD 14 A_SEL_FAULT 15 MCLK 16 OSC_RES 17 DVSSO 18 VR_DIG 19 PDN 20 LRCLK 21 SCLK 22 SDIN 23 SDA 24 SCL 25 RESET 26 STEST 27 DVDD 28 DVSS 29 GND 30 AGND 31 VREG 32 GVDD_OUT 33 BST_D 34 PVDD_CD_1 35 PVDD_CD_2 36 OUT_D 37 PGND_CD_1 38 PGND_CD_2 39 OUT_C 40 NC_3 41 NC_4 42 BST_C 43 BST_B 44 NC_5 45 NC_6 46 OUT_B 47 PGND_AB_1 48 PGND_A...

Page 39: ...THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC MHL_SW_AND 2013 09 01 L14_M1A 58 MHL_5V_EN MHL_OCP_EN MHL_CD_SENSE 3 3V_Normal IC5801 74LVC1G08GW MHL_SW_AND_GATE 3 GND 2 A 4 Y 1 B 5 VCC L14 MHL SW AND GATE Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ......

Page 42: ...ewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GCSC System for these model Contents of LCD TV Standard R...

Page 43: ...lacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 14 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable IR B D Cable 2012 01 14 Normal Audio On Y N Normal Voltage No...

Page 44: ...eplace Power Board and repair parts Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 LCD TV Error symptom 2012 01 14 End Normal Voltage Y N Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...ldering Y N Y Y By using Digital signal level meter By using Diagnostics menu on OSD Menu Set up Support Signal Test Signal strength Normal over 50 Signal Quality Normal over 50 Y Contact with signal distributor or broadcaster Cable or Air N N Y N A6 Standard Repair Process Established date Revised date 3 14 LCD TV Error symptom 2012 01 14 End Normal Signal Normal Picture Normal Picture Normal Pic...

Page 46: ...ch with installed ANT N Y N A6 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom 2012 01 14 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Contact with signal distributor or broadcaster Cable or Air N Check Tuner soldering Replace Main B D Normal Picture End Normal Picture Normal Setting SVC Bulletin Normal Sign...

Page 47: ...lace Main B D N N A Video error Color error A7 N Y Replace module Request repair for external device cable Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 LCD TV Error symptom 2012 01 14 End Color error Color error External device Cable Normal External Input Co mponent error HDMI error External device Cable Normal Copyright 2014 LG Electronics Inc All rights...

Page 48: ... Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Connect other external device and cable Check normal operation of External Input Component HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D N Y Check S W Version Y N S W Upgrade Y N Y N Replace Main B D Replace Module Established date Revised date 6 14 LCD TV Error sym...

Page 49: ...ut of Power B D N Y Replace Main B D Y Replace Main B D N Y Check ST BY 3 5V Replace Power B D N Replace Power B D Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 LCD TV Error symptom Stand By Red 2012 01 14 End Power LED On Normal Voltage Normal Voltage Normal Operati on Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE In...

Page 50: ...MER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown s...

Page 51: ...Speaker disconnection N Y Replace Speaker Replace MAIN Board C Audio error No audio Normal video A15 A16 Established date Revised date 9 14 LCD TV Error symptom Standard Repair Process 2012 01 14 End Normal Voltage Off Disconn ection Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...heck audio B Voltage 24V In case of External Input signal error Check and fix external device Replace Main B D N Established date Revised date 10 14 LCD TV Error symptom Standard Repair Process A16 2012 01 14 End Signal Normal Normal Voltage Normal Audio Wrecked Audio Discontinuation Noi se for all audio Wrecked Audio Discontinuation Noise only for D TV Wrecked Audio Discontinuation Noise only for...

Page 53: ...on Connector solder Check B 3 5V On Main B D A17 N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A4 Check IR Output signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 LCD TV Error symptom 2012 01 14 End Normal Operating Normal Voltage Normal Signal Normal Operating Normal Voltage E...

Page 54: ...al information D Function error External device recognition error Established date Revised date 12 14 LCD TV Error symptom Standard Repair Process 2012 01 14 Signal Input Technical information External Input And Component Recognition error HDMI Optical Recognition error Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ...For models without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 13 14 LCD TV Error symptom Standard Repair P...

Page 56: ...Exterior defect Exterior defect Established date Revised date 14 14 LCD TV Error symptom Standard Repair Process 2012 01 14 Module damage Cabinet damage Remote Controller damage Stand damage Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...10 11 Check Link Cable LVDS reconnection condition A8 A9 12 Adjustment Test pattern ADJ Key A10 13 A Video error_Vertical Horizontal bar residual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Con Board 2 A ...

Page 58: ... MODE checking method A14 28 C Audio error_No audio Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking method ...

Page 59: ...Video error_No video Normal audio ALL MODELS A1 Established date Revised date Error symptom Content LCD TV 2012 01 14 Power On disjoint back case check lighting at 2 points Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ... Revised date Error symptom Content LCD TV 2012 01 14 1 Measure DC 24V applying to inverter PCB from Power Board 2 Output 24V from Power Board supply to inverter PCB Check Pin contacting statement and connection statement Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ... White Balance value A Video error_No video Normal audio ALL MODELS A3 Established date Revised date Error symptom Content LCD TV Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 7 3 After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD 2012 01 14 Copyright 2014 LG Elec...

Page 62: ...ror symptom Content LCD TV 2012 01 14 18 Pin Power Board Main Board SMAW200 H18S5 1 Power on 2 DRV ON 3 3 5V 4 PDIM 1 5 3 5V 6 3 5V 7 GND 8 PDIM 2 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 NC 17 GND 18 GND Check DC 3 5V 12V 24V Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ... etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...stop 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version A6 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ... bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content LCD TV ALL MODELS 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...echnical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error ALL MODELS A8 A9 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ... using the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A10 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 68: ...n Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...ower Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ...pendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...lock Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 73: ...er error _No power A11 Established date Revised date Error symptom Content LCD TV ST BY condition Red Front LED control Menu Option Standby Light On Off 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...or symptom Content LCD TV 2012 01 14 18 Pin Power Board Main Board SMAW200 H18S5 1 Power on 2 DRV ON 3 3 5V 4 PDIM 1 5 3 5V 6 3 5V 7 GND 8 PDIM 2 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 NC 17 GND 18 GND Check DC 3 5V 12V 24V Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 75: ...tent LCD TV 2012 01 14 18 Pin Power Board Main Board SMAW200 H18S5 1 Power on 2 DRV ON 3 3 5V 4 PDIM 1 5 3 5V 6 3 5V 7 GND 8 PDIM 2 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 NC 17 GND 18 GND Check power on Pin 1 pin is high about 3 3V Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 76: ...Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A14 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 77: ... Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A15 Established date Revised date Error symptom Content LCD TV 2012 01 14 Copyright 2014 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 78: ...he speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video ALL MODELS A16 Established date Revised date Error symptom Content LCD TV 18 Pin Power Board Main Board SMAW200 H18S5 1 Power on 2 DRV ON 3 3 5V 4 PDIM 1 5 3 5V 6 3 5V 7 GND 8 PDIM 2 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 NC...

Page 79: ...e Analog Tester needle moves slowly and defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error ALL MODELS A17 Established date Revised date Error symptom Content LCD TV 2012 01 14 P4600 Sub Ass y Main Ass y Copyright 2014 LG Electronics Inc All rights reserved On...

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