LG 37LV5500 Service Manual Download Page 1

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LED LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LB12E

MODEL : 37LV5500

37LV5500-TA

MODEL :

37LV550Y

37LV550Y-TA

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Printed in Korea

P/NO : MFL67007010 (1103-REV00)

Summary of Contents for 37LV5500

Page 1: ...ETY PRECAUTIONS IN THIS MANUAL CHASSIS LB12E MODEL 37LV5500 37LV5500 TA MODEL 37LV550Y 37LV550Y TA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO MFL67007010 1103 REV00 ...

Page 2: ...opyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 8 DISASSEMBLY 15 EXPLODED VIEW 17 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...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 metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path t...

Page 4: ...ation EMC CE IEC 4 Model General Specification No Item Specification Remarks 1 Market ASIA Oceania Africa DTV Analog Middle East PAL DVB Market DTV Region Australia New Zealand AU Singapore SG Indonesia ID Malaysia MY Vietnam VN South Africa ZA Iran IR 2 Broadcasting system 1 PAL B G Australia India only PAL 2 PAL D K 3 PAL I I 3 SECAM DK BG I 4 DVB T 3 Receiving system Analog Upper Heterodyne G D...

Page 5: ...s Resolution H freq kHz V freq Hz Pixel Clock MHz 1 720 400 31 468 70 08 28 321 For only DOS mode 2 640 480 31 469 59 94 25 17 VESA Input 848 480 60 Hz 852 480 60 Hz 640 480 60 Hz Display 3 800 600 37 879 60 31 40 00 VESA 4 1024 768 48 363 60 00 65 00 VESA XGA 5 1360 768 47 72 59 8 84 75 WXGA 6 1920 1080 66 587 59 93 138 625 WUXGA FHD model 6 RGB PC 7 HDMI Input 1 DTV Mode No Resolution H freq kHz...

Page 6: ...25 HDTV 720P Side by Side half Top and Bottom 7 1280 720 37 5 50 74 25 HDTV 720P Side by Side half Top and Bottom 8 1920 1080 33 7 60 74 25 HDTV 1080i Side by Side half Top and Bottom 9 1920 1080 28 1 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 2 HDMI ...

Page 7: ... HDTV 1080I Side by Side Top Bottom 4 RGB PC Input No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 3D input proposed mode 1 1920 1080 67 5 60 148 5 HDTV 1080P Side by Side Top Bottom 5 DLNA No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 3D input proposed mode 1 1920 1080 33 75 30 74 25 HDTV 1080P Side by Side Top Bottom Checkerboard No Resolution H freq kHz V freq Hz Pixel...

Page 8: ...in the black level area 3 Automatic Adjustment 3 1 ADC Adjustment 1 Overview ADC adjustment is needed to find the optimum black level and gain in Analog to Digital device and to compensate RGB deviation 2 Equipment Condition 1 Jig RS 232C protocol 2 MSPG 925 Series Pattern Generator MSPG 925FA pattern 65 Resolution 480i Comp1 1080P Comp1 1920 1080 RGB Pattern Horizontal 100 Color Bar Pattern Patte...

Page 9: ...ort 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 2 LAN PORT inspection PING TEST 1 Play the LAN Port Test Program 2 Connect each other LAN Port Jack 3 Play Test F9 button and confirm OK Message 4 Remove LAN CABLE 3 5 Model name Serial number Download 1 Model name Serial number D L A Press Power on key of service remote...

Page 10: ...method 1 ADC 480i 1080p Comp1 1 Check connected condition of Comp1 cable to the equipment 2 Give a 480i 1080p Mode Horizontal 100 Color Bar Pattern to Comp1 MSPG 925FA Model 209 Pattern 65 480i MSPG 925FA Model 225 Pattern 65 1080p 3 Change input mode as Component1 and picture mode as Standard 4 Press the In start Key on the ADJ remote after at least 1 min of signal reception Then select 7 Externa...

Page 11: ...Equipment connection MAP 4 3 4 Adj Command Protocol Command Format LEN Number of Data Byte to be sent CMD Command VAL FOS Data value CS Checksum of sent data A Acknowledge Ex Send JA_00_DD Ack A_00_okDDX D sub to D sub DVI D to HDMI or HDMI to HDMI For HDMI EDID For Analog EDID 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 01 14 01 03 80 10 09 78 0A EE 91 A3 ...

Page 12: ...f 2 Test pattern ON OFF Default is inner ON By selecting OFF you can adjust using RF signal in 216 Gray pattern A Adj condition and cautionary items 1 Lighting condition in surrounding area Surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10 cm and perpendicular of the module surface 80 100 3 Agi...

Page 13: ...mming Function Check Step 1 Turn on TV Step 2 At the Local Dimming mode module Edge Backlight moving right to left Back light of IOP module moving Step 3 Confirm the Local Dimming mode Step 4 Press exit key 4 7 Magic Motion Remote control test Equipment RF Remote control for test IR KEY Code Remote control for test You must confirm the battery power of RF Remote control before test recommend that ...

Page 14: ...pallet to move on to next process 2 Checkpoint TEST voltage GND 1 5 KV min at 100 mA SIGNAL 3 KV min at 100 mA TEST time 1 second TEST POINT GND TEST POWER CORD GND SIGNAL CABLE METAL GND Internal Pressure TEST POWER CORD GND LIVE NEUTRAL LEAKAGE CURRENT At 0 5 mArms 5 Audio Measurement condition 1 RF input Mono 1 KHz sine wave signal 100 Modulation 2 CVBS Component 1 KHz sine wave signal 0 5 Vrms...

Page 15: ...Y 1 2 Loosen 4 screws that bind Stand Assembly and set Disassemble 18 screws around the 4 edges of set after separation Stand Assembly 3 4 Disassemble 4 VESA screws Disassemble 3 screws that fix Side AV bracket and Back cover 5 6 Disassemble 1 screw which bind Main Board and Back cover Detach Power cord Cover from the Back cover ...

Page 16: ...d Only for training and service purposes 7 8 Push the latch to get Power cord out of the set Remove the Back cover Push the Panel aside and bend Cabinet back Take the Panel out of Cabinet by detaching latch Disconnect cables of Soft touch PCB Motion PCB Speaker from Main board 9 ...

Page 17: ...cal 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 ...

Page 18: ...UT0_L2N AG27 TXOUT0_L2P AG28 TXCLK_LN AE26 TXCLK_LP AF26 TXOUT0_L3N AH27 TXOUT0_L3P AG26 TXOUT0_L4N AF25 TXOUT0_L4P AE25 TXOUT0_U0N AH26 TXOUT0_U0P AG25 TXOUT0_U1N AE24 TXOUT0_U1P AD24 TXOUT0_U2N AH25 TXOUT0_U2P AF24 TXCLK_UN AE23 TXCLK_UP AD23 TXOUT0_U3N AG24 TXOUT0_U3P AF23 TXOUT0_U4N AC22 TXOUT0_U4P AD22 TXOUT1_L0N AG23 TXOUT1_L0P AH23 TXOUT1_L1N AE22 TXOUT1_L1P AE21 TXOUT1_L2N AF22 TXOUT1_L2P ...

Page 19: ...ATD_7 GPIO L1 TSTRTD GPIO L3 TVLDD GPIO L2 MPEG_CLK GPIO P4 MPEG_D_0 GPIO T2 MPEG_D_1 GPIO R3 MPEG_D_2 GPIO R2 MPEG_D_3 GPIO P3 MPEG_D_4 GPIO P2 MPEG_D_5 GPIO P1 MPEG_D_6 GPIO R6 MPEG_D_7 GPIO N5 MPEG_SYNC GPIO T4 MPEG_DATA_EN GPIO P5 MCIF_RESET GPIO R4 MCIF_SCLK GPIO U1 MCIF_SCTL GPIO T3 MCIF_SDI GPIO T1 MCIF_SDO GPIO T5 VI_IFP0 C17 VI_IFM0 B17 VDDR_AGC D15 AGC_SDM_2 B16 AGC_SDM_1 A16 GPIO_0 A15 ...

Page 20: ...BS4 C20 VI_INCM_CVBS4 B20 VI_SIF1_1 E19 VI_INCM_SIF1_1 D19 VI_SIF1_2 E10 VI_INCM_SIF1_2 F11 LGE35230 BCM35230KFSBG IC101 NON_BCM_CAP SPDIF_INC_P B15 SPDIF_INC_N C15 SPDIF_IND_P C14 SPDIF_IND_N B14 I2SSCK_IN GPIO G4 I2SWS_IN F4 I2SSD_IN GPIO G5 AADC_LINE_L1 C25 AADC_LINE_R1 B24 AADC_INCM1 A24 AADC_LINE_L2 E22 AADC_LINE_R2 E23 AADC_INCM2 D23 AADC_LINE_L3 C24 AADC_LINE_R3 C23 AADC_INCM3 B23 AADC_LINE...

Page 21: ..._13 AA24 DDR_ADA_14 AD27 DDR_BAA_0 Y27 DDR_BAA_1 AB28 DDR_BAA_2 W24 DDR_RASA_N V24 DDR_CASA_N W25 DDR_WEA_N V26 DDR_CKEA U24 DDR_CKA01_P W27 DDR_CKA01_N W28 DDR_CKA23_P N28 DDR_CKA23_N N27 DDR_VREFA U23 DDR_RST_N AA23 DDR_ZQ W26 C421 2 2uF C403 2 2uF C407 2 2uF NFM18PS105R0J C410 6 3V OUT IN GND NFM18PS105R0J C432 6 3V OUT IN GND NFM18PS105R0J C433 6 3V OUT IN GND NFM18PS105R0J C402 6 3V OUT IN GN...

Page 22: ... SDA2_3 3V R630 22 WIRELESS_DET NEC_ISP_Rx IC602 uPD78F0514 NEC_MICOM 1 P60 SCL0 2 P61 SDA0 3 P62 EXSCL0 4 P63 5 P33 TI51 TO51 INTP4 6 P75 7 P74 8 P73 KR3 9 P72 KR2 10 P71 KR1 11 P70 KR0 12 P32 INTP3 OCD1B 13 P31 INTP2 OCD1A 14 P30 INTP1 15 P17 TI50 TO50 16 P16 TOH1 INTP5 17 P15 TOH0 18 P14 RXD6 19 P13 TXD6 20 P12 SO10 21 P11 SL10 RXD0 22 P10 SCK10 TXD0 23 AVREF 24 AVSS 25 ANI7 P27 26 ANI6 P26 27 ...

Page 23: ..._1 R708 10 5V_HDMI_3 D0 _HDMI4 C707 10uF 10V CK _HDMI1 5V_Normal 5V_HDMI_2 CK _HDMI4 D1 _HDMI2 R723 4 7K D0 _HDMI4 C703 0 1uF 16V R741 120K DDC_SDA_1 DDC_SDA_1 D2 _HDMI3 HDMI_HPD_4 D0 _HDMI1 R720 4 7K C712 0 1uF 16V DDC_SDA_2 C713 0 1uF 16V 3 3V_HDMI 5V_HDMI_1 C715 0 1uF 16V OPT JK702 RSD 105156 100 EAG62611201 14 NC 13 CE_REMOTE 5 D1_GND 20 BODY_SHIELD 12 CK 11 CK_GND 2 D2_GND 19 HP_DET 18 5V 10 ...

Page 24: ... 3V_Normal JP809 D803 30V OPT R815 2 7K R833 100 C824 0 1uF 16V HP_DET C801 560pF 50V HP_LOUT_N DSUB_HSYNC R808 10K OPT SPK_R _HOTEL NEC_RXD L804 BG2012B080TF 3 3V_Normal RGB_DDC_SCL PC_R_IN JK805 SPG09 DB 009 1 2 3 4 5 6 7 8 9 10 C818 1uF 10V HP_LOUT Q801 2SC3052 E B C C816 1uF 10V C823 2 2uF 10V DSUB_G D810 KDS184 A2 C A1 D804 30V R813 75 C821 1uF 10V R812 75 HP_LOUT_P 3 3V_Normal R814 2 7K C813...

Page 25: ...8 1 5K IR_PASS Q905 2SC3052 COMMERCIAL E B C D906 5 6V CDS3C05HDMI1 R933 100 R908 47K Q904 2SC3052 WIRELESS E B C R919 10K 1 D901 5 6V AMOTECH R918 47K WIRELESS L902 BLM18PG121SN1D 3 3V_Normal D907 5 6V AMOTECH R912 47K WIRELESS R921 47K COMMERCIAL P901 12507WR 15L IR_15P 1 EEPROM_SCL 2 EEPROM_SDA 3 GND 4 KEY1 5 KEY2 6 3 5V 7 GND 8 LED_B LOGO 9 IR 10 GND 11 3 3V 12 LED_R BUZZ 13 GND 14 S T_SCL 16 ...

Page 26: ...24V 20V 17V _1 12 I2C_SCL 11 GND_2 2 VCC 24V 20V 17V _2 19 GND_5 18 IR 10 RESET 4 VCC 24V 20V 17V _4 1 VCC 24V 20V 17V _1 17 GND_4 9 GND_1 8 INTERRUPT 3 VCC 24V 20V 17V _3 16 UART_TX 7 DETECT 6 VCC 24V 20V 17V _1 15 UART_RX 20 GND_6 21 SHIELD WIRELESS_SDA D1002 5 6V CDS3C05HDMI1 WIRELESS WIRELESS_SCL R1002 22K WIRELESS C1002 2 2uF WIRELESS R1003 2 2K WIRELESS Q1001 WIRELESS MMBT3904 NXP E B C WIRE...

Page 27: ...1101 5 6V C1108 560pF 50V C1114 560pF 50V COMP2 C1109 560pF 50V AV1_CVBS_IN SC_G COMP2_Y R1129 1K AV2 R1126 75 COMP2 AV1_R_IN D1112 5 6V COMP2 AV2_L_IN R1111 470K ZD1112 5 1V R1110 470K D1105 5 6V R1123 470K COMP2 R1127 2 7K COMP2 R1125 75 COMP2 COMP1_DET SC COMP2_L_IN R1122 470K COMP2 ZD1106 5 1V COMP2 R1121 0 COMP2 SC_R COMP2_Pr C1110 560pF 50V AV2_CVBS_DET R1140 10 AV2 C1107 560pF 50V SC_DET CO...

Page 28: ...208 0 1uF WIFI USB_CTL2 D1205 5 6V CDS3C05HDMI1 USB_OCD2 C1214 0 1uF WIFI R1214 100K OPT USB_CTL2 R1227 0 NON_WIFI C1224 0 1uF SIDE_USB_OCD1 USB_CTL1 R1206 100K WIFI USB_DP1 C1204 1uF 10V WIFI WIFI_DM R1226 0 NON_WIFI 5V_USB WIFI_DP SIDE_USB_DM USB_DP1 P1201 12507WR 04L WIFI 1 VDD 2 DM 3 DP 4 GND 5 L1203 BLM18PG121SN1D WIFI WIFI_DM R1221 4 7K OPT 3 3V_USB R1212 100K OPT C1210 0 1uF WIFI USB_DM2 R1...

Page 29: ...R1322 2 7K M_REMOTE 3D_GPIO_1 3D_GPIO_0 M_REMOTE_RX R1325 22 M_REMOTE M_RFModule_RESET 3D_GPIO_2 R1321 2 7K M_REMOTE 3 3V_Normal P1302 12507WR 12L M_REMOTE 1 3 3V 2 GND 3 RX 4 TX 5 RESET 6 DC 7 DD 8 GND 9 GPIO_0 10 GPIO_1 11 GPIO_2 12 3D_SYNC 13 3 3V_Normal R1317 100 M_REMOTE R1323 2 7K M_REMOTE L1303 120 ohm M_REMOTE R1318 100 M_REMOTE R1316 100 M_REMOTE R1324 22 M_REMOTE DC_MREMOTE M_REMOTE_TX 5...

Page 30: ... 0 1uF 16V 2 5V_BCM35230 EPHY_TDN EPHY_ACTIVITY EPHY_LINK JK1401 XRJH 01A 4 DA7 180 LG B 1 R1 2 R2 3 R3 4 R4 5 R5 6 R6 7 R7 8 R8 12 SHIELD 9 R9 11 R11 10 R10 GND D1 YL_C D2 YL_A D3 GN_C D4 GN_A D1403 5V LAN_ESD D1405 5V LAN_ESD D1401 5 5V LAN_ESD D1404 5 5V LAN_ESD D1402 5 5V LAN_ESD D1406 5 5V LAN_ESD R1401 240 R1402 240 DUAL COMPONENT D1401 D1402 D1403 D1404 D1405 D1406 14 ETHERNET Ethernet Bloc...

Page 31: ...1P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 TXA0N TXD2N R1512 10K BIT_SEL_LOW TXB0N TXC0P TXACLKN TXD0N C1501 10uF 25V OPT TXC1P TXC3N TXB1P TXC2P TXC0N TXBCLKP TXC4N TXCCLKP TXA1P TXD1P TXDCLKN SDA2_3 3V TXCCLKN TXBCLKN R1507 33 FRC2 TXD0P TXB4N TXB2P TXC4P TXD4P TXA1N TXB4P TXD3N R1506 33 FRC2 TXB1N TXA0P R1508 33 FRC2 T...

Page 32: ...TURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SCL2_3 3V R1602 33 LPB_42 47 55 SDA2_3 3V R1601 33 LPB_42 47 55 L DIM0_MOSI L DIM0_SCLK L DIM0_VS P1601 12507WR 08L L Dim Wafer 1 2 3 4 5 6 7 8 9 50 BCM35230 16 L_DIMMING Local Dimming Block Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 33: ...ASTER_CLK D1804 100V 1N4148W OPT R1801 10K C1834 1000pF 50V SPK_WOOFER_R AMP_RESET_N 0 1uF C1877 50V R1851 3 3 OPT 0 1uF C1840 50V C1810 10uF 10V OPT 0 1uF C1832 16V AUD_LRCK C1869 0 47uF 50V WOOFER C1813 33pF 50V NTP_WOOFER AUD_SCK C1817 10uF 10V OPT C1856 1uF 25V SPK_WOOFER_L 0 1uF C1879 50V D1803 100V 1N4148W OPT C1864 390pF 50V 24V_AMP C1858 1uF 25V 3 5V_ST C1866 390pF 50V 24V_AMP 0 1uF C1874 ...

Page 34: ...K C1911 0 1uF 16V OPT R1969 10K CI CI_ADDR 9 C1915 0 1uF 16V OPT R1980 100 CI R1945 10K OPT R1966 10K CI R1985 10K CI R1936 0 OPT R1949 22 CI R1937 62 CI R1959 22 CI PCM_MCLKI PCM_TS_SYNC C1904 0 1uF CI CI_MIVAL_ERR CI_ADDR 13 CI_MISTRT R1947 22 CI PCM_ADDR 4 PCM_MDI 0 7 PCM_ADDR 9 3 3V_CI R1931 22 CI CI_ADDR 12 R1918 22 OPT R1903 22 CI PCM_MIVAL_ERR R1939 10K CI PCM_ADDR 12 PCM_ADDR 12 IC1903 74L...

Page 35: ... 19 ERR 20 SYNC 21 VALID 22 MCL 23 D0 24 D1 25 D2 26 D3 27 D4 28 D5 29 D6 30 D7 31 SHIELD TU2202 4 TDFR C056D CN_VERTIAL_LG3911 1 RF_S W_CNTL 2 BST_CNTL 3 B1 5V 4 NC RF_AGC 5 NC_1 6 SCLT 7 SDAT 8 NC_2 9 SIF 10 NC_3 11 VIDEO 12 GND 13 B2 1 2V 14 B3 3 3V 15 RESET 16 NC_4 17 SCL 18 SDA 19 ERR 20 SYNC 21 VALID 22 MCL 23 D0 24 D1 25 D2 26 D3 27 D4 28 D5 29 D6 30 D7 31 SHIELD TU2202 5 TDFR C036D CN_HORI...

Page 36: ...B 12V_LNB A_GND A_GND A_GND C2311 10uF 25V LNB R2301 33 LNB C2307 0 01uF 50V LNB SDA1_3 3V C2302 1uF 50V LNB LNB_INT R2304 4 7K LNB DCDC_GND A_GND C2306 22000pF LNB C2301 0 22uF 25V IC2301 A8290SETTR T LNB 1 BOOST 3 TCAP 7 TDI 9 VREG 10 SDA 11 ADD 12 SCL 13 NC_2 14 IRQ 15 NC_3 16 NC_4 17 NC_5 18 NC_6 19 BFC 20 NC_7 21 NC_8 22 BFO 23 NC_9 24 BFI 25 VIN 26 LX 27 GNDLX 28 LNB 5 TDO 8 GND 6 EXTM 4 NC_...

Page 37: ...LD C2515 100uF 16V EU C2516 100pF 50V EU R2545 10K EU R2516 0 EU SC_FB R2511 470K EU Q2502 2SC3052 EU E B C DTV_ATV_SELECT D2501 5 5V EU 12V R2519 1K AUD_OUT R2536 470 EU C2517 100pF 50V EU C2524 47uF 16V EU C2511 0 1uF EU Q2505 RT1P141C T112 EU 1 2 3 D2512 30V OPT R2558 10K OPT C2532 180pF 50V OPT DTV MNT_R_OUT R2514 10K EU SC COMP2_R_IN D2507 5 6V OPT C2519 1000pF 50V EU SCART1_Lout_P C2514 10uF...

Page 38: ...SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC CHBO_TS_SYNC CHBO_TS_SERIAL CHB_RESET CHBO_TS_VAL_ERR CHBO_TS_CLK TS Output 50 28 BCM35230 NON CHB NON CHB Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 39: ...TIC AMP_MUTE_HOTEL AMP_MUTE_HOTEL SPK_R _HOTEL C2901 0 1uF CN_HOTEL P2901 12505WS 09A00 CN_HOTEL 1 2 3 4 5 6 7 8 9 10 R2904 0 CN_HOTEL 3 3V_Normal SPK_R _HOTEL AMP_RESET_N R2903 0 CN_HOTEL AUDIO_R Q2901 MMBT3904 NXP CN_HOTEL E B C R2901 200 CN_HOTEL R2902 10K CN_HOTEL 24V_AMP 1ST EBK61012601 2ND 0TRDI80002A DUAL COMPONENT CHINA HOTEL BCM35230 China Hotel Option Q2901 29 Copyright 2011 LG Electroni...

Page 40: ... AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 3D_SYNC L_VS 36 BCM35230 NON URSA 50 Copyright 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...10210 M3 1 GASKET_5 0T MDS62110210 M7 1 GASKET_5 0T MDS62110210 M6 1 GASKET_5 0T MDS62110210 M5 1 GASKET_5 0T MDS62110210 M8 1 GASKET_5 0T MDS62110210 M11 1 GASKET_5 0T MDS62110210 M10 1 GASKET_5 0T MDS62110210 M9 1 GASKET_5 0T MDS62110210 M12 1 GASKET_5 0T MDS62110206 M2 3 GASKET_6 5T MDS62110206 M4 3 GASKET_6 5T MDS62110206 M3 3 GASKET_6 5T MDS62110206 M8 3 GASKET_6 5T MDS62110206 M7 3 GASKET_6 ...

Page 42: ...10 M15 1 GASKET_5 0T MDS62110204 M15 2 GASKET_5 5T MDS62110206 M15 3 GASKET_6 5T MDS62110205 M13 4 GASKET_7 5T MDS62110205 M15 4 GASKET_7 5T MDS62110210 M14 1 GASKET_5 0T MDS62110209 M15 5 GASKET_8 5T MDS62110206 M14 3 GASKET_6 5T MDS62110208 M15 GASKET_4 5T MDS62110209 M14 5 GASKET_8 5T MDS62110210 M13 1 GASKET_5 0T MDS61887710 M14 6 GASKET_9 5T MDS61887710 M13 6 GASKET_9 5T MDS61887710 M15 6 GAS...

Page 43: ... 0 POWER_16_GND C591 0 1uF 16V C539 10uF 6 3V C594 22uF 10V 560pF C593 50V 10uF C590 10V L517 BLM18PG121SN1D L DIM0_VS L_VS R574 0 POWER_16_URSA_SCAN R573 0 POWER_16_BCM_SCAN R595 4 3K 1 R593 3 9K 1 R592 1K 1 R510 3 4 7K 1 PD_ 18 5V R510 4 5 6K 1 PD_ 20V R511 3 1 21K 1 PD_ 18 5V R511 4 1 3K 1 PD_ 20V R517 100K R516 100K PD_ 18 5_20_24V R512 2 7K 1 PD_ 12V R513 1 21K 1 PD_ 12V R510 8 2K 1 PD_24V R5...

Page 44: ......

Page 46: ... L R L L Δ L R R L R L Source Source L 1920x1080p 30Hz R 1920x1080p 30Hz Encoding Encoding L MPEG 4 AVC R MPEG 4 MVC Decoding Decoding L 1920x1080p 30Hz R 1920x1080p 30Hz HDMI 1 3 HDMI 1 3 Tx Tx L 1920x1080p 30Hz R 1920x1080p 30Hz HDMI 1 4 HDMI 1 4 Tx Tx L 1920x1080p 60Hz R 1920x1080p 60Hz Passive Type Display Active Type Display Full Resolution Support 3D Format Processing ...

Page 47: ...ly RF Component RGB USB LCD 120Hz panel FRC 2D to 3D URSA5 DTV Main Board 120P LVDS BD Player Passive Type Active Type RF Component RGB USB HDMI 1 3 HDMI 1 4 LCD 240Hz Panel DTV SoC LG1121 FRC2 LG1131A 2D to 3D LG5811 XTR T con BD Player DTV Main board FRC Sub board 3DTV System DTV SoC HDMI 1 3 HDMI 1 4 Mini LVDS ...

Page 48: ...R close L close R open L open R close 3D Sync signal Big Crosstalk because of driving system Double refresh rate LCD L L R R L L R R L open L close R open R close L L R R L L R R L open R close L close R open L open R close L open R close L close R open L open R close Data doubling Black insertion The duration without crosstalk can be made 3D with Active glasses ...

Page 49: ...cs Inc All rights reserved Only for training and service purposes LGE Internal Use Only 3D sync Backlight signal LEFT OPEN RIGHT OPEN ON ON OFF OFF Backlight blinking and Shutter glasses Don t need to control open time in Glasses ...

Page 50: ...ctronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 3D sync Backlight Scanning signal LEFT OPEN RIGHT OPEN Don t need to control open time in Glasses Backlight Scanning and Glasses ...

Page 51: ...er AOZ1072AI VLCD_POWER 2 5V 3 3VD LDO Regulator AP2132MP LDO Regulator AP2132MP Z_OUT I2C_SDA I2C_SCL VCC_LCM VDD_LCM HVDD P GAMMA IC MAX9668B 0xE8 P GAMMA IC MAX9668B 0xE8 GMA 18 15 GMA 9 5 P_VCOM DDR3 SDRAM 1Gbit x16 800MHz DDR3 SDRAM 1Gbit x16 800MHz LG1121 0x1C direct 0xB2 in direct XTAL_IN XTAL_OUT X Tal 24 75Mhz FRC_RESET XTR T Con 0x72 I2C_SDA I2C_SCL I2C_TCON_SDA I2C_TCON_SCL EEPROM 64kbi...

Page 52: ...CS SPI_DI SPI FLASH 4Mbit 0X98 SPI FLASH 4Mbit 0X98 1 5V 3 3VD LDO Regulator AP7173 SPG 13 LDO Regulator AP7173 SPG 13 URSA5 0xB4 LVDS data from Main IC BCM35230 XTAL_IN XTAL_OUT X Tal 24 75Mhz 12VD 1 26V_FRC DC DC Converter AOZ1072AI DC DC Converter AOZ1072AI Quad link LVDS 74 25MHz GP3 Backend block diagram PG 51Pin LVDS output 41Pin LVDS output BCM35230 12VD 3 3V_FRC DC DC Converter AOZ1072AI D...

Page 53: ...for BCM Chassis LG Electronics LCD TV JAN 13th 2011 Contents 0 ALEF Edge LED Overview models 1 Tool Option Information 2 Area Option Information 3 Main PCB for BroadBand 4 Formatter PCB for BroadBand 5 Block Diagram 6 Inner Connection 7 Repair Process Troubleshooting By M R VIJAYSHANKAR Model LW77 9500 TA LW57 6500 TA LV5500 TA ...

Page 54: ... Dimming Local Dimming BLU structure ALEF LED ALEF Type Local Dimming LED Array is on the back of Module Local dimming depicts more deep black Feature LED ALEF Model XXLW9500 TA 47inch H 24 V 10 240Block 55inch H 24 V 12 288Block XXLW7700 TA 42inch H 12 V 4 48Block 47inch H 12 V 5 60Block 55inch H 16 V 6 96Block Reflecting coating w patterns Guiding Layer Light Blocking Pattern Prism sheets DBEF P...

Page 55: ...ity thin TV Local Dimming Local Dimming BLU structure Edge LED Edge Type w Local Dimming Upper Metal Cover LED Array LED Array is on the side of Module Local dimming depicts more deep black Feature LED Edge Model 32inch H 2 V 5 10Block 37inch H 2 V 5 10Block 42inch H 2 V 8 16Block 47inch H 2 V 8 16Block 55inch H 2 V 8 16Block XXLV5500 TA XXLW6500 TA XXLW5700 TA ...

Page 56: ... Module Ver V6 TOOL 4 Setting Local Dimming 1 PSU Power 1 Digital Demod DVB_BCM Analog Demod LGT10 Audio Amp NTP2AMP Backlight Tyype ALEF_LED ALEF_LGD TOOL 3 Setting EMF JPEG MP3 1 Divx 1 DivX Plus 1 DLNA 1 Digital Eye 1 Headphone 1 Wireless Ready 1 DVR Ready 1 THX 0 THX Media Director 0 Picture Wizard 1 ISF 1 Energy Star OFF HDMI Switch IC SIL Scart Count None Display Port 0 TOOL 5 Setting WiFi 1...

Page 57: ... L 60 42LW5700 TA 33190 4811 3327 17593 14933 727 STD B L 60 47LW5700 TA 33192 4811 3327 17593 14933 726 STD B L 55 32LV5500 TA 32996 715 3327 17594 8789 663 STD B L 60 32LV5500 TA CMI 35044 715 3327 17594 8917 665 37LV5500 TA 32997 715 3327 17594 8789 663 37LV5500 TA AUO 37093 715 3327 17594 8917 665 42LV5500 TA 32998 715 3327 17592 8789 662 STD B L 55 42LV5500 TA AUO 37094 715 3327 17592 8917 66...

Page 59: ...ses LGE Internal Use Only 3 Main PCB for Broadband 1 Main processor DDR Memory Flash Memory 2 3 Voltage 5V 3 3V 0 9V 4 5 Voltage 1 25V 6 HDMI switch 4 1 7 Audio AMP Main Main Board LW9500 LW7700 Voltage 2 5V 1 5V Audio AMP Woofer 8 USB switch 2 1 Main Features 1 2 3 4 5 6 7 8 9 NEC MICOM 9 ...

Page 60: ...ervice purposes LGE Internal Use Only 3 Main PCB for Broadband Main Board LW9500 LW7700 Cables To Woofer To Power Board Not Use To Formatter Board To inner WiFi Assy Only LW9500 To Speaker To IR Soft Touch Assy To Motion Remocon Receiver RF Module A B C D E F G H A B C D E F G H ...

Page 61: ... Use Only Main Features Cables LW9500 LW7700 4 Formatter PCB for Broadband 1 FRC DDR Memory 2 3 2D to 3D IC 4 P GAMMA IC To Main Board LVDS Cable To LED Driver Board Master XTR IC To LCD Module LVDS 240Hz Cable To LCD Module LVDS 240Hz Cable A B C D 1 2 3 5 VOLTAGE 4 4 A B C D To LED Driver Board Slave E E ...

Page 62: ...ice purposes LGE Internal Use Only 3 Main PCB for Broadband 1 Main processor DDR Memory Flash Memory 2 3 Voltage 5V 3 3V 0 9V 4 5 Voltage 1 25V 6 HDMI switch 4 1 7 Audio AMP Main Main Board LW6500 LW5700 Voltage 2 5V 1 5V 8 Main Features NEC MICOM 1 2 3 4 5 6 7 URSA5 EXTERNAL FRC 8 ...

Page 63: ...rved Only for training and service purposes LGE Internal Use Only 3 Main PCB for Broadband Main Board LW6500 LW5700 Cables To Power Board Local Dimming To Power Board To Module 41P To Module 51P To Speaker To IR Soft Touch Assy A B C D E F A B C D E F ...

Page 64: ...OPTIC LAN SYSTEM DDR3 X 16 X 2 2Gb Audio AMP Woofer LVDS HDMI1 HDMI2 HDMI3 HDMI4 Side Bottom side COMP RGB H V Ethernet CVBS H P L R Out UART SYSTEM EEPROM X 1 1Mb HDMI S W HDCP EEPROM M Remote Module built in I2C Sub Micom sanyo Wireless Ready I2C USB HUB IC RF TUNER DVB T AUDIO 51P HDMI HUB IC 5 Block Diagram SG LW95 77 LV55 USB hub only LW9500 DVR ready Only LW9500 A V1 Rear T con FRCII Mini LV...

Page 65: ... Out BCM 35230 DVB T Demod USB1 USB2 COMP1 A V1 RS 232C PC RGB PC AUDIO OPTIC LAN SYSTEM DDR3 X 16 X 2 2Gb LVDS 41P HDMI1 HDMI2 HDMI3 HDMI4 Side Rear COMP RGB H V Ethernet CVBS CAM DVR Ready H P L R Out UART SYSTEM EEPROM X 1 1Mb HDMI S W HDCP EEPROM I2C Sub Micom NEC Wireless Ready I2C AUDIO 51P HDMI HUB IC LG7303A 5 Block Diagram LW65 57 CVBS M DIF RF TUNER DVB T SIF ...

Page 66: ...ROM AT24C02BN 10SU 1 8 RGB DET DSUB_R G B DSUB_ V HSYNC DSUB_V H SYNC DSUB_DET GPIO EDID_WP MICOM RGB_DDC_SCL RGB_DDC_SDA RGB_DDC_SCL RGB_DDC_SDA PC_L_IN PC_R_IN SPDIF_OUT SPDIF R L CVBS AV DET AV1_R_IN AV1_L_IN AV1_CVBS_IN AV1_CVBS_DET COMP_Y COMP_PB COMP_PR COMP DET COMP1 R L CVBS AV DET AV1_R_IN AV1_L_IN AV1_CVBS_IN AV1_CVBS_DET AV1 AV2 COMP2_R G B BSC_S_SCL BSC_S_SDA HDMI1 HDMI2 HDMI3 HDMI4 HD...

Page 67: ...XLW950T W S G XXLW770T W S G ALEF LED Backlight LED BLU control LED BLU control SPI Vsync FRC II LG1121 Main SoC BCM FHD 60Hz Dual Link LVDS 2 3D_Sync 2D 3D LGSIC XTR T Con LGSIC FHD 240Hz Quad Link HF mini LVDS 8 FHD 60Hz Dual Link LVDS 2 4 FHD 240Hz Octa Link LVDS Active Type Display RF Emitter Vsync RF comm Vsync Format info For more information about 3D system refer to the page 1 6 ...

Page 68: ...Touch IR 5 Motion Receiver RF Module 6 WiFi 1 2 3 4 5 6 Main to PSU Main to Woofer Main to Speaker Main to Formatter Main to WiFi Main to IR Soft Touch PCBs Cables 47 55LW9500 PSU 7 8 Woofer 8 9 Power to LED Driver Power to LED Driver Main to Motion Receiver RF Module 10 Formatter to LCD Module 1 2 3 4 4 5 6 7 8 9 Speaker 9 9 1 2 3 4 5 6 7 8 9 10 11 7 LED Driver to LCD Module 11 11 ...

Page 69: ...r PCB 3 Control Button 4 IR 5 Motion Receiver RF Module 6 1 2 3 4 5 6 Main to PSU Main to Woofer Main to Speaker Main to Formatter Main to Control Button Main to IR PCBs Cables 47 55LW7700 PSU 7 8 Woofer 8 9 Power to LED Driver Power to LED Driver Main to Motion Receiver RF Module 10 Formatter to LCD Module Speaker 7 1 2 3 4 5 6 7 8 8 1 2 3 4 5 6 9 7 8 10 ...

Page 70: ... All rights reserved Only for training and service purposes LGE Internal Use Only 6 Interconnection 1 sub PCB 47 55LW9500 Soft Touch IR Key PCB RF MOTION ASSY WIFI ASSY To Main 1 SPK unit WIFI ASSY RF MOTION ASSY Soft Touch IR Key PCB ...

Page 71: ...onics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 6 Interconnection 2 sub PCB 47 55LW7700 SPK unit RF MOTION ASSY IR PCB IR Key PCB RF MOTION ASSY To Main 1 Control key Control Key PCB ...

Page 72: ...poses LGE Internal Use Only 6 Interconnection 3 1 Main PCB 2 Power Board 3 Soft touch IR Key PCB T con Driver 1 2 3 4 5 Main PSU cable Main Module LVDS cable 41 51PIN LED driver PSU 15Pin IR Touch Cable SPK Cable Local Dimming Cable PCBs Cables 6 1 2 3 1 2 3 4 5 6 XXLW6500 TA XXLW5700 TA ...

Page 73: ...Internal Use Only 6 Interconnection 4 1 Main PCB 2 Power Board 3 Soft touch IR Key PCB LW570 only IR Assy T con Driver 1 2 3 4 5 Main PSU cable Main Module LVDS cable 41 51PIN LED driver PSU 15Pin IR Touch Cable SPK Cable Local Dimming Cable PCBs Cables 6 1 2 3 1 2 3 4 5 6 LED Driver 32 37LV5500 TA ...

Page 74: ...Interconnection 5 1 Main PCB 2 Power Board 3 Soft touch IR Key PCB LV570 only IR Assy T con Driver 1 2 3 4 5 Main PSU cable Main Module LVDS cable 41 51PIN LED driver PSU 15Pin IR Touch Cable SPK Cable Local Dimming Cable PCBs Cables 6 1 2 3 1 2 3 4 5 6 42 47LV5500 TA Same interconnection LW or LV serise in the 42 47 ...

Page 75: ...and service purposes LGE Internal Use Only Interconnection sub PCB LV LW55 57 65 serise IR Soft touch Key PCB LV LW570 only IR Assy To Main 1 Control key LV LW570 SPK unit IR Soft touch Key PCB LV LW570 only IR Assy 3 LW65 serise LV LW55 Serise LV LW57 Serise LV LW57 Serise ...

Page 76: ...rror 5 5 Vertical Horizontal bar residual image light spot external device color error 6 6 B Power error No power 7 7 Off when on off while viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error No response in remote controller key error recording error memory error 11 11 External device recognition error 12 12 E Noise Circu...

Page 77: ...ts Check Power Board 24v output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End Always check record S W Version and White Balance value before replacing 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 A28 A7 A3 First of...

Page 78: ...nal Use Only Normal voltage Check various voltages of Power Board 3 5V 12V 20V or 24V No Video No audio Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 LCD TV Error symptom 2 2010 12 14 ...

Page 79: ... not By connecting RF Cable at other equipment DVD Player Set Top Box Different maker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close Menu Setup Booster 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 Normal Picture Y Contact...

Page 80: ...or not Check whether other equipments have problem or not By connecting RF Cable at other equipment Set Top Box Different maker TV etc Y Change satellite setting match with installed ANT N Normal Picture Y Close N A7 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom 4 2011 01 24 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiS...

Page 81: ...rnal Input COMPONENT RGB HDMI DVI Y External device Cable normal External Input Component error Check external device and cable Y External device Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A8 N Y End Replace module Request repair for external device cable Color error Check Test pattern A12 A10 A11 Standard Repair ...

Page 82: ... other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation of Extern...

Page 83: ...on Check Power On High Check Power cord was inserted properly Check Power LED Replace Power B D Measure voltage of each output of Power B D N Y Normal voltage Replace Main B D N Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A19 A4 Standard Repair Process Established date Revised date 7 14 LCD TV Error symptom 7 Stand By Red Opera...

Page 84: ...D TV Error symptom Standard Repair Process 8 Status Power off List Explanation Normal POWEROFF_REMOTEKEY Power off by REMOTE CONTROL POWEROFF_OFFTIMER 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 b...

Page 85: ...r menu Speaker off Off N Y Cancel OFF Check audio B 24V of Power Board Normal voltage Y N Replace Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A24 A25 Disconnection Established date Revised date 9 14 LCD TV Error symptom Standard Repair Process 9 2010 12 14 ...

Page 86: ...ked audio Discontinuation Noise only for Analog Wrecked audio Discontinuation Noise only for External Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 24V Repla...

Page 87: ...e customer cause is interference from light in room Check R C Operating When turn off light in room Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A27 Normal Voltage Close 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 Normal Signal N Y Repair Replace IR ...

Page 88: ...rmation Check input signal Signal input Y N External Input and Component Recognition error Check and fix external device cable RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date 12 14 LCD TV Error symptom Standard Repair Process 12 2010 12 14 ...

Page 89: ...the description OR If there is a Tak Tak noise from the cabinet refer to the KMS fix information and then proceed as shown in the solution manual For models without any fix information provide the description 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 ...

Page 90: ...ly Replace module Zoom part with exterior damage Module damage Cabinet damage Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Adjust VCOM Established date Revised date 14 14 LCD TV Error symptom Standard Repair Process A28 14 2010 12 14 ...

Page 91: ...method A6 7 LCD TV Version checking method A7 9 A Video error_Color error LCD TV connection diagram A8 10 Tuner Checking Part A9 11 Check Link Cable LVDS reconnection condition A10 A11 12 Adjustment Test pattern ADJ Key A12 13 A Video error_Vertical Horizontal bar residual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition A10 A11 A10 LVDS A11 Driver b d ...

Page 92: ..._Off when on off while viewing POWER OFF MODE checking method A22 27 B Power error_Off when on off while viewing POWER BOARD PIN voltage checking method A19 28 C Audio error_No audio Normal video Checking method in menu when there is no audio A24 29 Voltage and speaker checking method when there is no audio A25 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in c...

Page 93: ...te Standard Repair Process Detail Technical Manual Revised date A1 Error symptom Content Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from module XXLW950X MODELS LCD TV A1 2010 12 14 XXLW770X MODELS ...

Page 94: ...echnical Manual LED driver B 24V measuring method A Video error_No video Normal audio A2 Established date Revised date Error symptom Content LCD TV A2 Check the DC 24V 12V 3 5V and Inverter on ALEF LED Edge LED P203 1 5 24V 6 10 GND 11 Error 12 Inverter ON 13 A dim 14 P dim P202 1 5 24V 6 10 GND 11 Error 12 Inverter ON 13 A dim 14 P dim 2010 12 14 ...

Page 95: ...dium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio ALL MODELS A3 Established date Revised date Error symptom Content LCD TV A3 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 valu...

Page 96: ...udio A4 Established date Revised date Error symptom Content LCD TV A4 Check the DC 24V 12V 3 5V 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 20V 24V 3 20V 24V 4 20V 24V 5 GND 6 GND 7 GND 8 GND 9 3 5V 10 3 5V 11 3 5V 12 3 5V 13 GND 14 GND 15 GND 16 GND 17 12V 18 Inverter On off 19 12V 20 Lamp A Dim LED N C 21 12V 22 PWM Dim 1 23 N C Lamp SCANNING Model PWM Dim 2 24 Error out AL...

Page 97: ...up Æ support Æ signal test Æ select channel When the signal is strong use the attenuator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A6 Established date Revised date Error symptom Content LCD TV A6 2010 12 14 ...

Page 98: ...d Repair Process Detail Technical Manual LCD TV Version checking method A Video error_Video error video lag stop 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A7 Established date Revised date Error symptom Content LCD TV A7 2010 12 14 ...

Page 99: ...ndard Repair Process Detail Technical Manual LCD TV connection diagram 1 A Video error _Vertical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A8 Established date Revised date Error symptom Content LCD TV A8 LW95 LW77 LV55 LW65 LW57 2010 12 14 ...

Page 100: ...ngth or check whether the screen is normal when the external device is connected 2 After measuring each voltage from power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop ALL MODELS A9 Established date Revised date Error symptom Content LCD TV A9 2010 12 14 ...

Page 101: ...ernal Use Only Standard Repair Process Detail Technical Manual Check Link Cable LVDS reconnection condition A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A10 Established date Revised date Error symptom Content LCD TV A10 ALL MODELS 2010 12 14 ...

Page 102: ...Internal Use Only Standard Repair Process Detail Technical Manual Check Link Cable reconnection condition A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A11 Established date Revised date Error symptom Content LCD TV A11 ALL MODELS 2010 12 14 ...

Page 103: ...etail Technical Manual Adjustment Test pattern ADJ Key A Video error_Color error You can view 6 types of patterns 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 A12 Established date Revised date Error symptom Content LCD TV A12 2010 12 14 ...

Page 104: ...efect CNT Broken T Con Defect CNT Broken T Con Defect CNT Broken T Con Defect CNT Broken Solder defect CNT Broken 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 A 1 5 ...

Page 105: ... training and service purposes LGE Internal Use Only Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 A 2 5 ...

Page 106: ...ight 2011 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only Appendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 ...

Page 107: ...for training and service purposes LGE Internal Use Only Appendix Exchange the Module 1 Panel Mura Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage A 4 5 Un repairable Cases In this case please exchange the module ...

Page 108: ...tal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Vertical Line Source TAB IC Defect Vertical Block 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 A 5 5 Un repairable Cases In this case please exchange the module ...

Page 109: ...ernal Use Only Standard Repair Process Detail Technical Manual Check front display LED B Power error _No power A17 Established date Revised date Error symptom Content LCD TV A17 ST BY condition Red Power ON condition white Front LED control Menu Æ Option Æ Power Indicator Æ Standby light ON 2010 12 14 ...

Page 110: ...m Content LCD TV A18 For 10 models there is no voltage out for st by purpose When st by only 3 5V is normally on Check the DC 20V 24V 12V 3 5V 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 20V 24V 3 20V 24V 4 20V 24V 5 GND 6 GND 7 GND 8 GND 9 3 5V 10 3 5V 11 3 5V 12 3 5V 13 GND 14 GND 15 GND 16 GND 17 12V 18 Inverter On off 19 12V 20 Lamp A Dim LED N C 21 12V 22 PWM Dim 1 23 N ...

Page 111: ...19 Established date Revised date Error symptom Content LCD TV A19 Check power on pin is high 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 20V 24V 3 20V 24V 4 20V 24V 5 GND 6 GND 7 GND 8 GND 9 3 5V 10 3 5V 11 3 5V 12 3 5V 13 GND 14 GND 15 GND 16 GND 17 12V 18 Inverter On off 19 12V 20 Lamp A Dim LED N C 21 12V 22 PWM Dim 1 23 N C Lamp SCANNING Model PWM Dim 2 24 Error out ALEF ...

Page 112: ...od 1 Press the IN START button of the remote controller for adjustment 2 Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A22 Established date Revised date Error symptom Content LCD TV A22 2010 12 14 ...

Page 113: ...ss the MENU button on the remote controller 2 Select the AUDIO function of the Menu 3 Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A24 Established date Revised date Error symptom Content LCD TV A24 2010 12 14 ...

Page 114: ...ik sound when you touch the GND and output terminal the 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 A25 Established date Revised date Error symptom Content LCD TV A25 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 20V 24V 3 20V 24V 4 20V 24V 5 GND 6 GND...

Page 115: ...on it is normal when the 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 A27 Established date Revised date Error symptom Content LCD TV A27 P8200 1 SCL 2 SDA 3 GND 4 KEY1 5 KEY2 6 St 3 5V 7 GND 8 LED_B logo_...

Page 116: ... Remote controller 3 Adjust sequence Press the adj key select V COM As pushing the right or the left button on the remote controller And find the V COM value Which is no or minimized the Flicker If there is no flicker at default value Press the exit key and finish the VCOM adjustment Push the OK key to store the value Then the message Saving OK is pop Press the exit key to finish V COM adjustment ...

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