LG 55LA7400 Service Manual Download Page 92

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B. Power error

No power

Power LED

On?

DC Power on

by pressing Power Key

On Remote control

Normal

operation?

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

Normal

voltage?

Replace Main B/D

OK?

Replace Main B/D

Normal?

Check ST-BY 3.5V

Replace Power B/D

Normal

voltage?

Replace Power

B/D

☞

A17

☞

A18

☞

A19

☞

Standard Repair Process

Established

date

Revised date

6/13

LCD TV

Error

symptom

. Stand-By: Red

. Operating: white

※

Close

2012. 11 .30

LGE Internal Use Only

Summary of Contents for 55LA7400

Page 1: ...ODEL 55LA7400 55LA7400 UD 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: ...Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 13 EXPLODED VIEW 23 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: ...lectrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial 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...

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: ...special notice 1 Temperature 25 ºC 5 ºC 77 9 ºF CST 40 ºC 5 ºC 2 Relative Humidity 65 10 3 Power Voltage Market Input voltage Frequency Remark USA 110 240V 50 60Hz Standard Voltage of each product is marked by models 4 Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 20 minutes pr...

Page 7: ...42LN5750 UH LC470DUE SFR1 LGD 47LN5700 UA UH 47LN5750 UH 47LN5790 UA LC500DUE SFR1 LGD 50LN5700 UA UH 50LN5750 UH LC550DUJ SEE1 LGD 55LN5700 UA UH 55LN5750 UH 55LN5790 UA HC600DUD SLFP1 LGD 60LN5700 UA UH 60LN5750 UH HC600DUD SLFS1 LGD 60LN6150 UC LC420DUE SFU1 LGD 42LA6200 UA 42LA6205 UA LC470DUE SFU1 LGD 47LA6200 UA 47LA6205 UA LC500DUE SFU1 LGD 50LA6200 UA 50LA6205 UA LC550DUJ SEK1 LGD 55LA6200...

Page 8: ... 6 1280 720 44 96 59 94 74 176 HDTV 720P 7 1920 1080 33 75 60 00 74 25 HDTV 1080I 8 1920 1080 33 72 59 94 74 176 HDTV 1080I 9 1920 1080 67 50 60 148 50 HDTV 1080P 10 1920 1080 67 432 59 94 148 352 HDTV 1080P 5 2 Component 3D input Y CB PB CR PR No Resolution H freq kHz V freq kHz Pixel clock 3D input proposed mode Proposed 1 1280 720 45 00 60 00 74 25 2D to 3D Side by Side Top and Bottom HDTV 720P...

Page 9: ...ESA O 7 1360 768 47 712 60 015 85 50 VESA WXGA X 8 1280 1024 63 981 60 020 108 00 VESA SXGA O 9 1920 1080 67 5 60 148 5 HDTV 1080P O DTV 1 720 480 31 50 60 27 027 SDTV 480P 2 720 480 31 469 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 1280 720 44 96 59 94 74 176 HDTV 720P 5 1920 1080 33 75 60 00 74 25 HDTV 1080I 6 1920 1080 33 72 59 94 74 176 HDTV 1080I 7 1920 1080 67 500 60 148 ...

Page 10: ...rleaving Frame Sequential 44 96 45 148 351 148 5 74 17 74 25 Side by side Top and Bottom 4 1920 1080 67 432 67 5 59 94 60 148 35 148 5 Side by side Top and Bottom Checkerboard Row Interleaving Column Interleaving Frame Sequential 33 72 33 75 148 35 148 5 74 17 74 25 Side by side Top and Bottom 5 1920 1080 53 946 54 23 976 24 148 351 148 5 Side by side Top and Bottom Checkerboard Row Interleaving C...

Page 11: ...o 3D Side by side Top and Bottom 3 1280 720 89 91 90 59 94 60 148 351 148 5 2D to 3D Side by side Top and Bottom Checkerboard Row Interleaving Column Interleaving Frame Sequential 44 96 45 148 351 148 5 74 17 74 25 2D to 3D Side by side Top and Bottom 4 1920 1080 67 432 67 5 59 94 60 148 35 148 5 2D to 3D Side by side Top and Bottom Checkerboard Row Interleaving Column Interleaving Frame Sequentia...

Page 12: ...Top and Bottom Checkerboard Row Interleaving Column Interleaving Frame Sequentia Photo Side by side Top and Bottom HDTV 1080P 5 8 RF 3D Input DTV No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 3D input proposed mode 1 1280 720 45 000 60 74 25 HDTV 720P 2D to 3D Side by Side Top Bottom 2 1920 1080 33 75 60 74 25 HDTV 1080I 2D to 3D Side by Side Top Bottom 5 9 2D to 3D Conversion No INP...

Page 13: ...n PCBA Adjustments 1 ADC adjustment ADC adjustment is OTP Auto ADC 2 EDID download HDMI Remark Above adjustment items can be also performed in Final Assembly if needed Adjustment items in both PCBA and final assembly tages can be checked by using the INSTART Menu 1 ADJUST CHECK 3 2 Final assembly adjustment 1 White Balance adjustment 2 RS 232C functionality check 3 Factory Option setting per desti...

Page 14: ...ethod 1 Press Adj key on the Adj R C 2 Select EDID D L menu 3 By pressing Enter key EDID download will begin 4 If Download is successful OK is display but If Download is failure NG is displayed 5 If Download is failure Re try downloads Caution When EDID Download must remove RGB HDMI Cable 4 4 4 EDID DATA 4 4 4 1 2D_8bit_PCM US _ xvYCC off HDMI EDID 2D_8bit_PCM US _xvYCC off Reference HDMI1 HDMI3 I...

Page 15: ...7 03 0C 00 10 00 B8 2D HDMI2 67 03 0C 00 20 00 B8 2D HDMI3 67 03 0C 00 30 00 B8 2D 4 4 4 3 3D_8bit_PCM US _ xvYCC off HDMI EDID 3D_8bit_PCM US _xvYCC off Reference HDMI1 HDMI3 In the data of EDID bellows may be different by S W or Input mode ⓐ Product ID HEX EDID Table DDC Function 0001 0100 Analog 0001 0100 Digital ⓑ Serial No Controlled on production line ⓒ Month Year Controlled on production li...

Page 16: ...viation 2 How it works When R G B gain in the OSD is at 192 it means the panel is at its Full Dynamic Range In order to prevent saturation of Full Dynamic range and data one of R G B is fixed at 192 and the other two is lowered to find the desired value 3 Adj condition normal temperature Surrounding Temperature 25 5 C Warm up time About 5 Min Surrounding Humidity 20 80 Before White balance adjustm...

Page 17: ...he center of LCD module within 10cm of the surface 3 Press ADJ key EZ adjust using adj R C à 9 White Balance then press the cursor to the right KEY When KEY is pressed 206 Gray internal pattern will be displayed 4 Adjust Cool modes i Fix the one of R G B gain to 192 default data and decrease the others If G gain is adjusted over 172 and R and B gain less than 192 Adjust is O K ii If G gain is less...

Page 18: ...d to CANADA and MEXICO 5 2 2 Country Group selection 1 Press ADJ key on the Adj R C and then select Country Group Menu 2 Depending on destination select US then on the lower Country option select US CA MX Selection is done using KEY 5 2 3 Tool Option inspection Press Adj key on the Adj R C then select Tool option Model Tool 1 Tool 2 Tool 3 Tool 4 Tool 5 Tool 6 Tool 7 32LN5700 UA UH 289 12305 33160...

Page 19: ...om top to bottom If a local dimming function does not work a whole screen shows full white Local dimming All model except for 32LA6600 NE 5 4 Magic Motion remote controller Check 5 4 1 Test equipment RF remote controller for check IR KEY CODE remote controller Check AA battery before test A recommendation is that a tester change battery every lots 5 4 2 Test 1 Make pairing with TV set by pressing ...

Page 20: ...asses Fig 2 Fig 3 OK in 3D mode without 3D glasses NG in 3D mode without 3D glasses 5 7 HDMI ARC Function Inspection 5 7 1 Test equipment Optic Receiver Speaker MSHG 600 SW 1220 HDMI Cable for 1 4 version 5 7 2 Test method 1 Insert the HDMI Cable to the HDMI ARC port from the master equipment HDMI1 2 Check the sound from the TV Set 3 Check the Sound from the Speaker or using AV Optic TEST program ...

Page 21: ...erates If Test is passed GOOD Lamp on and move to next process automatically 7 3 Checkpoint 1 Test voltage GND 1 5KV min at 100mA SIGNAL 3KV min at 100mA 2 TEST time 1 second 3 TEST POINT GND Test POWER CORD GND and SIGNAL CABLE GND Hi pot Test POWER CORD GND and LIVE NEUTRAL 4 LEAKAGE CURRENT At 0 5mArms 8 USB S W Download optional Service only 1 Put the USB Stick to the USB socket 2 Automaticall...

Page 22: ...GB Success is displayed If ADC calibration is failure ADC RGB Fail is displayed 12 If ADC calibration is failure after recheck ADC pattern or condition retry calibration 9 2 Manual White balance Adjustment 9 2 1 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...

Page 23: ...se 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 IMPORTANT SAFETY NOTICE A22 A10 AT1 AG1 900 200 400 410 540 521 530 120 560 300 570 500 ...

Page 24: ...NER R153 2 7K NON_TU_Q_KR MT5398_MISTRT R121 1 2K R158 22 OPCTRL_11_SCL MT5398_TS_IN 4 MODEL_OPT_9 M_REMOTE_RX SMARTCARD_CLK SD_EMMC_DATA 0 C110 0 1uF I2C_SCL1 3 3V_NORMAL I2C_SCL_MICOM MT5398_TS_SYNC WOL ETH_POWER_ON M_REMOTE_TX I2C_SDA1 MT5398_TS_OUT 0 7 R162 1K R118 33 OPCTRL7 R148 4 7K MTK_NON_EPI MT5398_XTAL_IN FE_DEMOD1_TS_SYNC R133 2 7K PCM_RST R131 4 7K MTK_DDR_1 25GB R120 33 R157 1K OPT V...

Page 25: ...UT TUNER_SIF DTV MNT_V_OUT_SOC SC_FB_SOC C359 0 047uF TU_A_GLOBAL_6 7 SC_COM_SOC TXA4P C343 100pF 50V TXB4N TXB0N PCM_CE1 EPHY_RDP TP327 R372 0 R352 1 2K HP_OUT TP351 SC_R_SOC C371 0 01uF COMP1_Y AV1_CVBS_SOC HDMI_HPD_3_JACK PCM_RST TP339 TXA4N EO_SOC CI_CD2 R355 75 1 TU_RESET2 TXC4N MT5398_TS_IN 0 TP314 MCLK_SOC COMP1_Pr TP341 TP302 D2 _HDMI1_SOC TP381 MT5398_TS_SYNC TP350 C339 560pF 50V OPT D0 _...

Page 26: ... AH7 VCCK_58 AJ7 VCCK_59 AK7 VCCK_60 AL7 VCCK_61 AM7 VCCK_62 AN7 VCCK_63 L16 VCCK_64 V12 VCCK_65 U12 VCCK_66 T12 VCCK_67 AD13 VCCK_68 AD17 VCCK_69 AD14 VCCK_70 AB12 VCCK_71 AA12 VCCK_72 AC12 VCC3IO_C T9 VCC3IO_B_1 Y10 VCC3IO_B_2 AA10 VCC3IO_A_1 D22 VCC3IO_A_2 E22 DVSS_1 AC18 DVSS_2 AB21 DVSS_3 AB14 DVSS_4 N13 DVSS_5 P13 DVSS_6 R13 DVSS_7 T13 DVSS_8 U13 DVSS_9 V13 DVSS_10 W13 DVSS_11 Y13 DVSS_12 P1...

Page 27: ...Q H1 ZQ L8 VDD_1 B2 VDD_2 D9 VDD_3 G7 VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 A14 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSSQ_2 B9 VSSQ_3 D1 VSSQ_4 D8 VSSQ_5 E2 VSSQ_6 E8 VSSQ_7 F...

Page 28: ...WER_ON OFF1 12V C2457 0 1uF 16V R2413 0 5 P_DET_BOTH_24_3 5V C2452 100pF 50V POWER_ON OFF2_1 R2404 5 1K 1 R2400 0 P_DET_BOTH_12_3 5V 3 5V_ST P2401 SMAW200 H18S1 POWER_18P 14 12V 9 24V 4 PDIM 1 18 GND 13 12V 8 GND 3 3 5V 17 GND 12 GND 7 GND 2 INV ON 16 24V 11 GND 6 PDIM 2 1 PWR ON 15 12V 10 24V 5 3 5V 19 3 3V_NORMAL R2425 100 INV_CTL R2426 1K L2411 2 2uH NR5040T2R2N IC2403 TPS54319TRE 1 VIN_1 3 GND...

Page 29: ...21 11 P70 KR0 SCK21 SCL21 12 P30 INTP3 RTC1HZ SCK11 SCL11 13 P50 INTP1 SI11 SDA11 14 P51 INTP2 SO11 15 P17 TI02 TO02 16 P16 TI01 TO01 INTP5 17 P15 PCLBUZ1 SCK20 SCL20 18 P14 RXD2 SI20 SDA20 19 P13 TXD2 SO20 20 P12 SO00 TXD0 TOOLTXD 21 P11 SI00 RXD0 TOOLRXD SDA00 22 P10 SCK00 SCL00 23 P146 24 P147 ANI18 25 P27 ANI7 26 P26 ANI6 27 P25 ANI5 28 P24 ANI4 29 P23 ANI3 30 P22 ANI2 31 P21 ANI1 AVREFM 32 P2...

Page 30: ...02 MMBT3906 NXP E B C SIL_RESET HDMI_DET R3319 22 HDMI_EXT_EDID R3304 1K D1 _HDMI3_JACK Q3310 MMBT3904 NXP E B C HDMI_HPD_4_MHL L3302 BLM18PG121SN1D NON_TU_H N S_T US CEC_REMOTE DDC_SCL_MHL D2 _HDMI4_JACK R3308 100 SIL_HPD CBUS HDMI_HPD_1_SOC MHL_DET 3 3V_NORMAL Q3301 MMBT3904 NXP E B C D0 _HDMI1_SOC R3373 1K 1 16W 5 C3316 0 1uF 16V D2 _HDMI1_SOC C3314 0 1uF 16V OPT R3305 1K Q3313 MMBT3904 NXP HDM...

Page 31: ...NTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SPDIF_OUT C3602 0 1uF 16V R3611 2 7K OPT JK3602 JST1223 001 1 GND 2 VCC 3 VINPUT 4 FIX_POLE 3 3V_NORMAL R3610 33 36 JACK HIGH MID 2011 11 21 SPDIF SPDIF OUT Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 32: ...HAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC R3700 10K HP_LOUT HP_ROUT 3 3V_NORMAL HP_DET JK3700 PEJ034 01 6B T_TERMINAL2 7B B_TERMINAL2 5 T_SPRING 4 R_SPRING 3 E_SPRING R3701 1K 37 JACK_COMMON 2011 11 21 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 33: ... 10uF 10V WIFI 3 3V_NORMAL R4133 10K OPT WIFI_DP 3 3V_NORMAL WIFI_DM P4101 12507WR 08L NON_EYE_Q_8P 1 GND 2 KEY1 3 KEY2 4 3 5V_ST 5 GND 6 LOGO LED_R 7 IR 8 GND 9 L4100 BLM18PG121SN1D M_RFModule_RESET LOGO_LIGHT R4113 100 AR4100 100 1 16W M_REMOTE C4104 1000pF 50V R4118 10K 5 C4107 100pF 50V R4125 10K LED_R C4112 10uF 10V WIFI RTS KEY2 IR C4120 0 1uF 16V LOGO_LIGHT KEY1 3 5V_ST_WAKE D4100 5 6V AMOT...

Page 34: ...02 3AU04S 305 ZC LG 1 2 3 4 5 USB_DP3 USB_DP2 USB_DM2 USB_CTL3 R4301 10K D4302 RCLAMP0502BA OPT D4300 RCLAMP0502BA OPT 5V_USB_2 R4302 10K JK4300 3AU04S 305 ZC LG 1 2 3 4 5 C4302 0 1uF 16V 5V_USB_3 USB_DM3 5V_NORMAL 5V_USB_2 3 3V_NORMAL 5V_USB_3 C4301 10uF 10V C4337 10uF 10V C4322 10uF 10V C4310 10uF 10V IC4306 TPS2066CDGNR 3 EN1 2 IN 4 EN2 1 GND 5 FLT2 6 OUT2 7 OUT1 8 FLT1 9 EP GND 43 USB2_USB3 20...

Page 35: ...ONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 5V_USB_1 USB_DP1 D4500 RCLAMP0502BA OPT R4500 10K OPT USB_OCD1 5V_USB_1 C4500 0 1uF 16V JK4500 3AU04S 305 ZC LG 1 2 3 4 5 USB_CTL1 USB_DM1 3 3V_NORMAL R4501 10K 5V_NORMAL C4501 10uF 10V C4502 10uF 10V IC4500 BD82020FVJ 3 IN_2 2 IN_1 4 EN 1 GND 5 OC 6 OUT_1 7 OUT_2 8 OUT_3 DVR Ready OCP USB1 USB1 MAX 1 5A Copyright ⓒ 2013 LG Electronics Inc All right reser...

Page 36: ...R3810 10K DTV MNT_V_OUT_SOC P3800 12507WS 04L UART_4PIN_STRAIGHT 1 2 3 4 5 COMP1_Pr D3802 5 6V AV_COMP_ESD R3806 10K D3803 5 6V AV_COMP_ESD SOC_TX ZD3804 ADUC 5S 02 0R5L R3800 75 1 TU_DEBUG JK3800 PPJ245 01 6A GN C SPRING 7A GN E LUG 4A GN CONTACT 5B BL C SPRING 8C RD1 E LUG S 6C RD1 C SPRING 4C RD1 CONTACT 5D WH C SPRING 4E RD2 CONTACT 6E RD2 C SPRING 7E RD2 E LUG R3801 0 OPT R3811 1K R3812 1K 38...

Page 37: ... THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC D5001 5 5V LAN_ESD EPHY_TDN D5003 5 5V LAN_ESD D5000 5 5V LAN_ESD D5002 5 5V LAN_ESD EPHY_TDP EPHY_RDN EPHY_RDP C5000 0 1uF 16V C5001 0 01uF 50V JK5000 RJ45VT 01SN002 NON_LN56 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 50 LAN_VERTICAL 2012 03 08 Ethernet Block Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service ...

Page 38: ...5412 12 R5417 5 1K SPK_L C5417 22000pF 50V 0 1uF C5401 50V I2C_SDA1 0 1uF C5419 50V C5435 0 47uF 50V SPK_L Q5400 MMBT3904 NXP AMP_MUTE_MICOM E B C C5429 390pF 50V C5404 1000pF 50V R5416 5 1K L5404 1 NRS6045T100MMGK Audio_Coil_TAIYO 10 0uH L5405 1 NRS6045T100MMGK Audio_Coil_TAIYO 10 0uH L5402 1 NRS6045T100MMGK Audio_Coil_TAIYO 10 0uH L5403 1 NRS6045T100MMGK Audio_Coil_TAIYO 10 0uH 1uF C5412 10V L54...

Page 39: ...OUT R6103 33K HP_OUT_MTK C6102 1uF 10V HP_OUT R6105 4 7K HP_OUT C6103 1uF 10V HP_OUT HP_ROUT_MAIN L6100 120 ohm HP_OUT BLM18PG121SN1D C6104 180pF HP_OUT_MTK R6106 43K 1 HP_OUT C6107 0 1uF 16V HP_OUT C6109 180pF HP_OUT_MTK R6102 33K HP_OUT_MTK HP_ROUT_AMP C6104 1 18pF HP_OUT_H13 C6109 1 18pF HP_OUT_H13 C6108 10pF 50V HP_OUT C6106 10pF 50V HP_OUT IC6100 TPA6138A2 3 OUTR 2 INR 4 GND_1 1 INR 6 VSS 5 M...

Page 40: ...V_M 8 S_CVBS 9 M_IF_AGC 10 M_DIF P 11 M_DIF N 12 B4 3 3V_S 13 B5 1 8V_S 14 NC_1 15 GND 16 SD_ERROR 17 SD_SYNC 18 SD_VALID 19 SD_MCLK 20 SD_SERIAL_D0 21 NC_2 22 NC_3 23 NC_4 24 NC_5 25 NC_6 26 NC_7 27 NC_8 28 GND_1 29 GND_2 30 B6 1 23V_SD 31 SD_RESET 36 SHIELD 32 B7 3 3V_SD 33 NC_9 34 SD_SCL 35 SD_SDA A1 A1 B1 B1 TU6403 TDSN B601F B TU_BR 1 RF_S W_CTL 2 RESET_TUNER 3 SCL 4 SDA 5 B1 3 3V 6 SIF 7 B2 ...

Page 41: ... BR IC6501 AP2132MP 2 5TRG1 EAN61387601 TU_Q N M W 3 VIN 2 EN 4 VCTRL 1 PG 5 NC 6 VOUT 7 ADJ 8 GND 9 EP FE_DEMOD1_TS_ERROR IF_P FE_DEMOD1_TS_SYNC TU_CVBS C6538 10uF 10V 3 3V_TU 3 3V_TU FE_DEMOD1_TS_VAL L6507 BLM18PG121SN1D TU_Q W_KR BR TW CO JP Q6501 MMBT3906 NXP TU_A_GLOBAL_6 7 E B C I2C_SCL4_TU R6513 10 TU_Q I2C_SCL4 I2C_SDA4 3 3V_TU R6508 1 1K 5 TU_N M_CN TW BR C6503 0 1uF 16V TU_S N Q_T US KR ...

Page 42: ...P 28 RD1N 29 RD1P 30 RD2N 31 RD2P 32 GND 33 RDCLKN 34 RDCLKP 35 GND 36 RD3N 37 RD3P 38 RD4N 39 RD4P 40 GND 41 GND 42 GND TXB1P R7102 10K LVDS_SEL_LOW TXD3P TXC2P TXB0P TXCCLKN TXD1N TXDCLKP TXC3P C7100 10uF 16V OPT TXDCLKN TXBCLKN TXA4P R7100 33 LGD_2D 3D_CTRL TXD2N TXA3P L7100 BLM18SG121TN1D LVDS_51PIN PANEL_VCC TXD2P TXA2P TXD3N TXD4N I2C_SCL1 TXA4N TXB0N TXACLKP TXD1P P7100 FI RE51S HF J R1500 ...

Page 43: ... USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC L DIM0_VS_PWR L DIM0_SCLK_PWR R7601 10K L DIM_OUT_8P P7600 12507WR 08L L DIM_OUT_8P 1 2 3 4 5 6 7 8 9 L DIM0_MOSI_PWR R7602 33 L DIM_OUT_8P R7603 33 L DIM_OUT_8P I2C_SCL1 I2C_SDA1 76 LOCAL DIMMING 2011 12 13 To LED DRIVER LOCAL DIMMING Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 44: ...VCOM_N GMA7 C7723 10uF 25V R7761 10K OPT VST 3 3V_NORMAL C7739 0 1uF 50V VCOM1 C7748 1uF 25V GMA15 TXB1N IC7700 TPS65178RSLR EPI 1 OUT4 2 SWB4 3 RST 4 OUT1 5 OUT2 6 SWB2 7 PGND2 8 SWB1_1 9 SWB1_2 10 NC 11 PVINB1_1 12 PVINB1_2 13 AVIN 14 PVINB3 15 SWB3 16 OUT3 17 PGND3 18 PGND_1 19 PGND_2 20 SW_1 21 SW_2 22 SWI 23 SWO 24 AGND 25 SS 26 COMP 27 SCL 28 SDA 29 VL 30 TCOMP 31 CTRLP 32 VGH 33 SWP 34 SWN ...

Page 45: ...AL 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 VDD VDD_EPI C7801 68uF EPI C7800 68uF EPI T Con 77 2011 12 01 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ...VSSQ_3 N5 VSSQ_4 P4 VSSQ_5 P6 NC_1 A1 NC_2 A2 NC_3 A8 NC_4 A9 NC_5 A10 NC_6 A11 NC_7 A12 NC_8 A13 NC_9 A14 NC_10 B1 NC_11 B7 NC_12 B8 NC_13 B9 NC_14 B10 NC_15 B11 NC_16 B12 NC_17 B13 NC_18 B14 NC_19 C1 NC_20 C3 NC_22 C7 NC_23 C8 NC_24 C9 NC_25 C10 NC_26 C11 NC_27 C12 NC_28 C13 NC_29 C14 NC_30 D1 NC_31 D2 NC_32 D3 NC_33 D4 NC_34 D12 NC_35 D13 NC_36 D14 NC_37 E1 NC_38 E2 NC_39 E3 NC_40 E12 NC_41 E13...

Page 47: ...ILRE 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 24V_AMP C5450 10uF 35V OPT Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ......

Page 49: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ... of 2013y Model Name Description of Tool Options Model naming and Tool option 13년 모델명 변경 Tool option Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...FHD 120Hz 10 bit application Lock signal cascading and feedback to T Con Embedded Control Data Merits Better reliability on common noise No data skew and better EMI margin Fewer lines than mini LVDS Slim PCB design TCON 2 LOCK VCC 1 Figure1 Topology Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ... No data skew Better EMI margin Lower cost Cable Connector Slim S PCB design 14mm Æ 10mm helps slimmer TV EPI FHD 10bit 60Hz 120Hz 240Hz 960ch 960ch 720ch No of Signal 12 12 32 Connector 50 pin 2ea 70pin 2ea LCM T con to S Driver IC TCON 2 LOCK VCC 1 TCON 18 VCC 1 18 HF mini LVDS EPI Bandwidth Capability FHD 120Hz 10Bit 594Mbps 36Lines 1 65Gbps 12Lines FHD 240Hz 10Bit 594Mbps 72Lines 1 25Gbps 32Li...

Page 56: ... structure Standardization Fewer Lines 12 Embedded clock low EMI Clock skew free Easy to PCB design Demerit Too many lines 36 Clock skew EMI due to clock lines Bandwidth limit Transmission Overhead 4bit delimiter TCON Lock 2 1 TCON EPI Interface mini LVDS vs EPI Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...sing Audio AMP 12W 12W LVDS or EPI Wafer xxLA6900 NA Key IR Front Spk To module 4 2 tuner model 1 1 Chassis LA33B PCB P No EAX64872101 WIFI RF 2 5 PSU 6 WiFi RF Magic Remocon receiver 6 5 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ... EEPROM M Remote Module Air Cable TUNER T C TUNER S2 DIGITAL DEMOD T C DVB S ANALOG DEMOD DIGITAL DEMOD S2 TS_S P LNB USB2 USB3 HDMI4 LVDS 41P 51P eMMC X 1 4GB USB_WIFI SYSTEM DDR3 X 1600 X 16 2Gb DDR CONTROLER A B SPI LOCAL DIMMING I2C Sub Micom RENESAS IR Remote Control SYSTEM DDR3 X 1600 X 16 2Gb SYSTEM DDR3 X 1600 X 16 2Gb UART P_TS EPI 50P 50P X_TAL 27MHz according to input spec Copyright ⓒ 2...

Page 61: ...b_SOC COMP1 AV1 DVI_L_IN_SOC AIN4_R_AADC COMP1 AV1 DVI_R_IN_SOC SC_CVBS_IN SC_FB SC_R G B SC_L R_IN TU_CVBS TUNER_SIF IF_P N CVBS3P SC_CVBS_IN_SOC SC_FB_SOC SOY1 PR1P PB1P Y1P AIN1_L R_AADC SC_R G B_SOC SC_L R_IN_SOC CVBS1P MPXP ADCINP_DEMOD ADCINN_DEMOD TU_CVBS TUNER_SIF IF_P N Parallel TS ERROR VAL SYNC CLK Parallel TS ERROR VAL SYNC CLK Copyright ⓒ 2013 LG Electronics Inc All right reserved Onl...

Page 62: ...5398 TUNER_SIF AOLRCK AOSDATA0 AUD_LRCK AUD_SCK AOBCK STB_SDA STB_SCL I2C_SDA1 I2C_SCL1 IC3000 MICOM AMP_MUTE AIN1_L_AADC AIN1_R_AADC AIN4_L_AADC AIN4_R_AADC JK501 DVB only DVB only AUD_MASTER_CLK AOMCLK JK4600 OPCTRL4 AMP_RESET_N IC6100 TPA6138A2PWR HP AMP JK3602 JK3700 LPF SPEAKER_L SPEAKER_R IC6000 AZ4580MTR OP AMP Mute CTRL TR SCART_MUTE SCART JK4600 WOOFER LPF내장 SIDE_HP_MUTE LPF Copyright ⓒ 2...

Page 63: ...01 DDC_SCL_1_SOC DDC_SCL_2_JACK DDC_SDA_2_JACK DDC_SCL_3_JACK DDC_SDA_3_JACK TMDS Link 8bits HDMI_ARC DDC_SDA_1_SOC X tal 32 768kHz TMDS Link 8bits TMDS Link 8bits WOL_CTL Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...ion Remote Receiver M_REMOTE_RX M_REMOTE_TX M_RFModule_RESET U1RX U1TX OPCTRL49 OPCTRL50 USB_DM_P3 USB_DP_P3 RENESAS MICOM U0TX U0RX SOC_TX SOC_RX USB_DP3 5V_USB_3 USB_CTL3 USB_OCD3 USB_DM_P1 USB_DP_P1 GPIO42 TCON12 USB_DM_P0 USB_DP_P0 USB3 USB_DM3 GPIO44 ADIN2_SRV CTS RTS ADIN4_SRV 4Pin debugging wafer Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes L...

Page 65: ...OD ADCINN_DEMOD 33 Ω 33Ω Attenuator 47 Ω MT5398_TS_OUT 0 7 CI_MDI 0 7 CI Slot 47 Ω MT5398_TS_IN 0 7 CI_TS_DATA 0 7 PCM_WE PCM_OE PCM_IRQA PCM_A_REG PCM_INPACK PCM_WAIT PCM_RST CI_DATA 0 7 CI_A_DATA 0 7 CI_ADDR 0 14 CI_A_ADDR 0 14 PCM_IORD PCM_IOWR PCM_CE2 PCM_CE1 CI_VS1 CI_CD1 CI_CD2 CI 5V Power detect PCM_5V_CTL 5V_CI_ON CI_TS_SYNC CI_TS_VAL CI_TS_CLK MTK5398_TS_SYNC MTK5398_TS_VAL MTK5398_TS_CLK...

Page 66: ... VCOMRFB GMA1 GMA3 GAM9 GMA10 GMA16 GMA18 VDD VCC VCC1 8 CLK1_I CLK6_I GMA4 GMA5 GAM7 GMA12 GMA14 GMA15 GMA4 GMA5 GAM7 GMA12 GMA14 GMA15 EO GST GCLK MCLK EPI_LOCK3 EPI_LOCK6_SOURCE EPI_LOCK6 H_VDD TR Diode TR Diode SWP CTRLP SWN CTRLN VGH VGL VGL_I VGH_EVEN VGH_ODD VGH_F VGH_R 6 6 2 2 2 2 2 2 2 2 6 VST GIP_RST Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service pur...

Page 67: ... 2KΩ IC5800 STA380 AMP I2C_SDA1 I2C_SCL1 22Ω P7600 Local dimming 33Ω IC101 HDCP EEPROM 22Ω 33Ω IC100 NVRAM 2 7KΩ 3 3V_Normal I2C_SDA5 I2C_SCL5 33Ω 33Ω I2C_SDA6 I2C_SCL6 TUNER D 2 7KΩ 3 3V_Normal 33Ω 33Ω IC3302 MHL 1 2KΩ 3 3V_MHL IC105 MTK5398 M13 I2C Block Diagram M13 I2C Block Diagram Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use On...

Page 68: ...s 5 Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...le Main Module LVDS Cable LED driver PSU 8Pin IR key Cable SPK Cable PCBs Cables 1 2 3 1 2 3 4 5 6 47LA6900 NA 7 RF Assy Cable 6 WIFI Assy Cable 7 5 4 4 RF Assy 5 WIFI Assy 6 Key Assy 6 5 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub ass ys 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...Introductions of 13Y RF assy Magic Remote control 목차 1 System 2 Block diagram 3 Paring method Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...ng success F W version BD_ADDR to the receiver The receiver sends the pairing success packet to TV directly F W version and BD_ADDR packets are just saved on the receiver The receiver sends F W version or BD_ADDR packet to TV when it is required Motion Data Transmission Period 7 5msec Motion Data gyro accelerometer Voice Data Transmission Period 10msec Voice sampling 16khz 16bit Copyright ⓒ 2013 L...

Page 73: ...ADCOM Bluetooth 4 0 Antenna Connector X tal 20 MHz 2 MR13 Block Diagram 1Mbit Serial Flash UART SPI Bluetooth Remote control Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...ss the remote should blink LED for some time and TV send pairing success packet back to TV When remote try to unpairing it doesn t care about state of receiver stand alone RF Unpairing Press HOME button and BACK button at the same time for 5 sec When remote try to unpairing it doesn t care about state of receiver stand alone After unpairing all pairing information should be erased After unpairing ...

Page 75: ... 29 83 1 Block diagram 2 Specification Introductions of 13Y WIFI built in assy 목차 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 76: ... GND USB DP DN DCDC EUP301 0 Crysta l 20MHz 3 3V 1 2V 3 3V 1 2V Switch DM3030 Antenn a 2 4G 5G Antenn a 2 4G 5G RX TX RX TX Block diagram 48 30 WOL Switch DM3030 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 78: ... Block Diagrams IIC Map 6 Structure of TV set and connection of sub assy s 7 New sub assy s Instruction of new sub assy s How to use tool Download 8 Adjust way of new features 9 Repair guide Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 79: ... 33 83 표지 12Y Widevine HDCP 2 0 NETFLX Contents 1 Widevine 2 HDCP 2 0 NETFLIX 3 DTCP Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 80: ...is the Solution Library offering Adaptive Streaming and DRM In BBTV when special CP do service this module is required key Currently CP which is requested to widevine is typically Australian Bigpond Live and North American CinemaNow Furthermore because the future will be the spread of CP widevine key download for the global model should be applied to production Because operation unique key should ...

Page 81: ...Specification developed by Intel Corporation to protect digital entertainment across the DVI HDMI interface Why HDCP2 0 9 HDCP revision 2 0 supports a broader range of wired and wireless interfaces Netflix 9 the services maintain a huge selection of movies and latest releases and offer DVD rentals via mail online streaming 2 HDCP 2 0 NETFLIX Copyright ⓒ 2013 LG Electronics Inc All right reserved O...

Page 82: ...ich is used to encrpt the content being exchanged DTCP The Digital Transmission Content Protection Specification defines a cryptogrphic protocol for protecting audio video entertainment content from unauthorized copying intercepting and tampering as it traverses digital transmission mechanisms such as a high performance serial bus that conforms to the IEEE 1394 1995 standard Only legitimate entert...

Page 83: ...ap 6 Structure of TV set and connection of sub ass ys 7 New sub ass ys Instruction of new sub ass ys How to use tool Download 8 Adjust way of new features 9 Repair guide 10 The latest issue and concerning issue Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 84: ...r 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 Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bull...

Page 85: ...Cable LVDS reconnection condition A10 A11 A10 32 37 42 47 55 A11 32 AUO 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 32 37 42 47 55 A11 32 AUO 15 Adjustment Test pattern ADJ Key A12 16 Appendix Defected Type caused by T Con Inverter Module Exchange T...

Page 86: ...lways 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 13 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A28 A7 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speake...

Page 87: ...nd 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 13 LCD TV Error symptom 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 88: ...ce 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 with signal distributor or broadcaster Cable or Air N N Normal Picture Y Close N A7 Standard Repair Process Es...

Page 89: ... 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 3 13 LCD TV Error symptom Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Normal setting Contact with signal distributor or broadcaster Cable or Air Close N Check Tuner soldering Repla...

Page 90: ...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 Process Established date Revised date 4 13 LCD TV Error symptom 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc ...

Page 91: ...ing 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 External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen...

Page 92: ... 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 6 13 LCD TV Error symptom Stand By Red Operating white Close 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service ...

Page 93: ...f 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 by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWER...

Page 94: ...nd 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 8 13 LCD TV Error symptom Standard Repair Process 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 95: ...nnect 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 Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Establ...

Page 96: ...ace 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 B D N A27 Replace Main B D Y A27 Standard Repair Process Established date Revised date 10 13 LCD TV Error symp...

Page 97: ...nal 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 11 13 LCD TV Error symptom Standard Repair Process 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 98: ...eed as shown in the solution manual 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 12 13 LC...

Page 99: ...ntroller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Adjust VCOM Established date Revised date 13 13 LCD TV Error symptom Standard Repair Process A28 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 100: ... 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 case of audio error A25 31 D Function error_ No response in remote controller key error Remote controller operati...

Page 101: ...ontent LCD TV Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 9 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 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 102: ...V 24 Pin Power Board Main Board 공통 SMAW200 H18S1 YEONHO 1 Power on 2 INV_ON 3 3 5V 4 PDIM 1 PWM Dim 1 5 3 5V 6 PDIM 2 PWM Dim 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 12V 17 GND 18 GND 19 GND 20 GND 21 GND 22 L DIM0_VS 23 L DIM0_MOSI 24 L DIM0_SCLK Edge LED 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal ...

Page 103: ...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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 104: ...op 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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 105: ...tal 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 ALL MODELS 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 106: ... 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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 107: ...rns 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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 108: ...oken 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 ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 109: ...l Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 110: ... Appendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 111: ...ge Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 112: ...l 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 Un repairable Cases In this case please exchange the module Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 113: ...shed date Revised date Error symptom Content LCD TV ST BY condition On Power ON condition Off but you can select On by menu Front LED control Menu Æ Option Æ LG Logo indicator Æ Bright Time 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 114: ... 3 5V is normally on 2012 11 30 Check the DC 24V 12V 3 5V 24 Pin Power Board Main Board 공통 SMAW200 H18S1 YEONHO 1 Power on 2 INV_ON 3 3 5V 4 PDIM 1 PWM Dim 1 5 3 5V 6 PDIM 2 PWM Dim 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 12V 17 GND 18 GND 19 GND 20 GND 21 GND 22 L DIM0_VS 23 L DIM0_MOSI 24 L DIM0_SCLK Edge LED Copyright ⓒ 2013 LG Electronics Inc All right reserved Only fo...

Page 115: ...D 18 GND 19 GND 20 GND 21 GND 22 L DIM0_VS 23 L DIM0_MOSI 24 L DIM0_SCLK 69 83 Standard Repair Process Detail Technical Manual Checking method when power is ON B Power error _No power A19 Established date Revised date Error symptom Content LCD TV Check power on pin is high 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only...

Page 116: ...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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 117: ...Other 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 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 118: ...V input voltage supplied from Power Board If there is no input voltage remove and check the connector Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik 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 MOD...

Page 119: ...s 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 P4102 1 GND 2 Key1 3 Key2 4 3 5V_ST 5 GND 6 LOGO LED_R 7 IR 8 GND 9 EYE_SCL 10 EYE_SDA 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc All right reserved On...

Page 120: ... 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 A28 Established date Revised date Error symptom Content LCD TV 2012 11 30 Copyright ⓒ 2013 LG Electronics Inc ...

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