LG 43LF5900 Page 73 Service Manual Download | Manualshive

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Checking order

1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 12.
4. When checking the Pre-Amp when the power is in ON condition, 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

Normal Remote controller operation checking method

D. Function error_ No response in remote controller

<ALL MODELS>

A27

Established

date

Revised

date

Error

symptom

Content

P4000

1

GND

2

3.4V_WIFI

3

M_RESET

4

USB_DM

5

GND

6

USB_DP

7

SDA

8

KEY1

9

SCL

10

KEY2

11

IR

12

+3.5V_ST

13

LED_R

14

GND

②

③

④

①

Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

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Summary of Contents for 43LF5900

Page 1: ...3LF5900 43LF5900 SA 43LF5900 SB 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: ...tronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 BLOCK DIAGRAM 15 EXPLODED VIEW 20 SCHEMATIC CIRCUIT DIAGRAM APPENDIX TROUBLE SHOOTING APPENDIX ...

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: ...ith BOM 5 The receiver must be operated for about 20 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 Model Specification No Item Specification Remark 1 Market Brazil 2 Broadcasting system Digital SBTVD Analog NTSC PAL M PAL N 3 Available Channel BAND NTSC VHF UHF DTV CATV 2 13 14 69 2 69...

Page 7: ...15 625 50 13 5 SDTV 576I 6 720 576 31 25 50 13 5 SDTV 576P 7 1280 720 37 5 50 74 25 HDTV 720P 8 1280 720 45 00 60 00 74 25 HDTV 720P 9 1280 720 44 96 59 94 74 176 HDTV 720P 10 1929 1080 28 125 50 74 25 HDTV 1080I 11 1920 1080 33 75 60 00 74 25 HDTV 1080I 12 1920 1080 33 72 59 94 74 176 HDTV 1080I 13 1920 1080 56 25 50 148 5 HDTV 1080P 14 1920 1080 67 50 60 148 50 HDTV 1080P 15 1920 1080 67 432 59 ...

Page 8: ...00 HDTV 720P DVB 12 1920 x 1080 28 12 50 00 HDTV 1080I DVB 13 1920 x 1080 33 72 59 94 HDTV 1080I 14 1920 x 1080 33 75 60 00 HDTV 1080I 15 1920 x 1080 26 97 23 97 HDTV 1080P 16 1920 x 1080 27 00 24 00 HDTV 1080P 17 1920 x 1080 33 71 29 97 HDTV 1080P 18 1920 x 1080 33 75 30 00 HDTV 1080P 19 1920 x 1080 56 25 50 00 HDTV 1080P DVB 20 1920 x 1080 67 43 59 94 HDTV 1080P 21 1920 x 1080 67 5 60 00 HDTV 10...

Page 9: ...ite pattern In this status you can maintain Heat Run useless any pattern generator Notice if you maintain one picture over 20 minutes Especially sharp distinction black with white pattern 13Ch or Cross hatch pattern 09Ch then it can appear image stick near black level 3 Adjustment items 3 1 PCB Assembly Adjustment MAC Address ESN Widevine HDCP1 4 HDCP 2 0 Download EDID The Extended Display Identif...

Page 10: ...mode Manual ADC Calibration When OTP mode is failed ADC calibration should be OK by using External mode If you want re adjust for ADC Enter Service Mode by pushing ADJ key Enter Internal ADC mode by pushing key at ADC Calibration Adjustment protocol Order Command Set response 1 Inter the Adjustment mode aa 00 00 a 00 OK00x 2 Change the Source xb 00 40 b 00 OK40x Adjust 480i Comp1 Adjust 1080p Comp...

Page 11: ...ate All Cool C50 13 000k K X 0 271 0 002 Y 0 270 0 002 Test signal Inner pattern for W B adjust External white pattern 80IRE 204gray Medium 0 9 300k K X 0 286 0 002 Y 0 289 0 002 Warm W50 6 500k K X 0 313 0 002 Y 0 329 0 002 1 RS 232C Command used during auto adj RS 232C COMMAND Explanation CMD DATA ID Wb 00 00 Begin White Balance adj Wb 00 ff End White Balance adj internal pattern disappears 5 2 ...

Page 12: ...Y X Y X Y 271 270 286 289 313 329 1 0 2 286 295 301 314 328 354 2 3 5 284 290 299 309 326 349 3 6 9 282 287 297 306 324 346 4 10 19 279 283 294 302 321 342 5 20 35 276 278 291 297 318 337 6 36 49 274 275 289 294 316 334 7 50 79 273 272 288 291 315 331 8 80 119 272 271 287 290 314 330 9 Over 120 271 270 286 289 313 329 O S Module AUO INX Sharp CSOT BOE Cool Medium Warm x y x y x y spec 271 270 286 ...

Page 13: ...rom 0 to 300 or not If it doesn t change the value the sensor is also defected one You have to replace it Caution Don t push The INSTOP KEY after completing the function inspection 6 GND and HI POT Testing 6 1 GND HI POT auto check preparation Check the connection between set and power cord 1 Check the POWER CABLE and SIGNAL CABE insertion condition 6 2 GND HI POT auto check 1 Pallet moves in the ...

Page 14: ...Value default 128 7 2 White balance Value CENTER DEFAULT C50 0 W50 R Gain 192 192 192 G Gain 192 192 192 B Gain 192 192 192 R Cut 64 64 64 G Cut 64 64 64 B Cut 64 64 64 8 USB DOWNLOAD epk file download 1 Put the USB Stick to the USB socket 2 Press Menu key and move General before 10 2 Step Set USB Expert Mode Enabled IN START System 3 USB Expert Mode 3 Press number key 7 Press 7 times 4 Select dow...

Page 15: ... 15 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes BLOCK DIAGRAM 1 MTK A5LR Block Diagram ...

Page 16: ... 16 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes 2 I2C Block Diagram ...

Page 17: ... 17 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes 3 Tuner CI Block Diagram TDJM K301F B301F ...

Page 18: ... 18 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes 3 1 Tuner CI Block Diagram TDJM T301F ...

Page 19: ... 19 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes 4 Power Block Diagram ...

Page 20: ...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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 200 521 400 800 540 120 570 571 530 350 900 901 LV1 A2 A1...

Page 21: ... 14 USB_CTL1 EMMC_DATA 3 FE_DEMOD1_TS_DATA 6 TP198 TP137 TPO_CLK I2C_SDA4 TP124 EB_ADDR 10 I2C_SDA3 SMARTCARD_DATA SD_EMMC_CLK L DIM0_SCLK LED_PWM0 TU_RESET2 EB_ADDR 7 TP143 TP121 EMMC_DATA 7 SMARTCARD_DET SD_EMMC_DATA 3 R136 PWM_DIM2 22 SMARTCARD_DET SD_EMMC_DATA 3 R135 22 PWM_DIM2 I2C_SCL4 I2C_SDA3 TPI_VAL EB_DATA 3 TP140 SC_ID_SOC EB_ADDR 2 CI_IOWR TPO_DATA 0 7 EB_ADDR 6 SMARTCARD_DATA SD_EMMC_...

Page 22: ...SOY1 N25 COM0 K26 PB0P K25 PR0P J26 Y0P K27 SOY0 K28 VDACX_OUT G27 AVDD33_VIDEO_STB H23 AVSS33_XTAL J20 AVSS33_DEMOD K20 HDMI_0_RX_0 A17 HDMI_0_RX_0B B17 HDMI_0_RX_1 A16 HDMI_0_RX_1B B16 HDMI_0_RX_2 A15 HDMI_0_RX_2B B15 HDMI_0_RX_C C17 HDMI_0_RX_CB D17 HDMI_1_RX_0 A20 HDMI_1_RX_0B B20 HDMI_1_RX_1 A19 HDMI_1_RX_1B B19 HDMI_1_RX_2 C18 HDMI_1_RX_2B D18 HDMI_1_RX_C C21 HDMI_1_RX_CB B21 HDMI_2_RX_0 W26...

Page 23: ...V_DDR R561 100 1 OPT R562 100 1 OPT 1 5V_DDR R565 100 1 R564 100 1 RCKE R566 100 1 R567 100 1 RODT 1 5V_DDR 1 5V_DDR C537 0 1uF OPT C538 0 1uF OPT C541 0 1uF OPT C540 0 1uF OPT C539 0 1uF OPT 0 1uF C542 OPT C543 0 1uF 16V OPT TP500 RCS RCSD IC101 LGE5221 A5LRA0 DEV RA0 AB4 RA1 AC9 RA2 AE3 RA3 AE6 RA4 AD9 RA5 AE4 RA6 AC11 RA7 AD5 RA8 AE9 RA9 AE5 RA10 AE7 RA11 AD11 RA12 AE12 RA13 AC5 RA14 AE10 RA15 ...

Page 24: ... Q2301 MMBT3904 NXP NPN_NXP E B C R2328 5 1K 1 3 4V_ST R2330 10K C2304 22uF 10V C2334 10uF 25V C2329 22uF 10V C2300 10uF 10V C2313 2700pF 50V C2333 10uF 25V C2310 10uF 10V L2300 UBW2012 121F 5V_USB_1 POWER_DET R2312 4 7K OPT C2342 10uF 25V L2310 120 ohm ZD2300 2 5V OPT PWM_DIM2 C2335 0 1uF 25V R2345 10K OPT 13V C2311 1uF 10V R2302 100 USB_CTL1 ZD2303 2 5V OPT C2349 22uF 16V C2344 0 1uF 25V USB_OCD...

Page 25: ...EDID_WP IC3000 R5F100GEAFB 30 1 P60 SCLA0 2 P61 SDAA0 3 P62 4 P63 5 P31 TI03 TO03 INTP4 6 P75 KR5 INTP9 SCK01 SCL01 7 P74 KR4 INTP8 SI01 SDA01 8 P73 KR3 SO01 9 P72 KR2 SO21 10 P71 KR1 SI21 SDA21 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 2...

Page 26: ... D1 1 D2 17 GND 9 D0 8 D0_GND 3 D2 16 DDC_DATA 7 D0 6 D1 15 DDC_CLK VDD3V3_HDMI DDC_SDA_3 5V_NORMAL VDD3V3 VA3203 ESD_HDMI HDMI_ARC VA3209 ESD_HDMI R3216 82 C3205 1uF 25V 5V_NORMAL R3214 47K R3215 47K R3217 180 5V_HDMI_3 Q3201 MMBT3904 NXP E B C R3202 1K 1 16W 5 R3203 1K 1 16W 5 R3204 4 7K R3209 33 HDMI_EXT_EDID Q3202 MMBT3904 NXP HDMI_EXT_EDID E B C DDC_SDA_2 DDC_SCL_2 AR3207 47K 1 16W R3207 4 7K...

Page 27: ...K HP_ROUT JK3402 PEJ034 01 HP_JACK 6B T_TERMINAL2 7B B_TERMINAL2 5 T_SPRING 4 R_SPRING 3 E_SPRING R3408 1K R3407 10K TP3401 HP_ROUT RIN1 HP_DET COMP1_Pr VA3404 5 6V VA3405 5 5V R3413 1K INT_HP_OUT VA3401 5 5V COMP1 AV1 DVI_R_IN HP_LOUT COMP1_Pb VA3406 5 6V COMP1_Y AV1 JK3401 PPJ245N2 01 Shield_COMP 5A GN YL O SPRING 6A GN YL E LUG 4A GN YL CONTACT 5B BL O SPRING 7C RD1 E LUG S 5C RD1 O SPRING 4C R...

Page 28: ... 3 4V_ST R4009 10K 5 C4002 100pF 50V R4012 100 3 4V_WIFI R4011 100 C4000 0 1uF 16V OPT R4014 33 3 4V_ST D4000 RCLAMP0502BA OPT EYE_SCL R4015 30K OPT R4007 0 IC4000 AO R123C7G LG IR_PROTO G GND V VS O OUT IR C4010 0 1uF IC4001 AP2191WG 7 3 FLG 2 GND 4 EN 1 OUT 5 IN C4008 0 1uF OPT R4010 10K 5 R4002 100 KEY1 WIFI_DM KEY2 3 4V_ST R4003 47 1 10W 5 IR_PROTO IR R4008 0 R4000 330 1 16W 5 IR_PROTO 3 4V_ST...

Page 29: ...TIC C4301 10uF 10V OPT R4303 2 2 R4302 2 2 R4301 2 2 R4300 2 2 D4303 RCLAMP0502BA D4302 RCLAMP0502BA C4303 22uF 10V C4300 10uF 10V OPT JK4301 3AU04S 305 ZC LG 1 2 3 4 5 USB_DM1 5V_USB_2 C4302 22uF 10V USB_DP1 USB_DP2 5V_USB_1 ZD4301 5V USB_ESD_SD05 JK4300 3AU04S 305 ZC LG 1 2 3 4 5 ZD4300 5V USB_ESD_SD05 USB_DM2 C4305 22uF 10V C4304 22uF 10V A5LR_Bring_Up 2014 11 01 43 USB USB2 MAX 1 5A USB1 MAX 1...

Page 30: ... THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC C5000 0 1uF 16V D5002 5 5V LAN_ESD D5001 5 5V LAN_ESD C5001 0 01uF 50V JK5000 RJ45VT 01SN002 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 D5000 5 5V LAN_ESD EPHY_RDN EPHY_RDP EPHY_TDN EPHY_TDP D5003 5 5V LAN_ESD Ethernet Block A5LR_Bring_Up 2014 11 01 50 ETHERNET Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service...

Page 31: ...R_DET C5614 390pF 50V P5600 WAFER ANGLE 1 2 3 4 13V_AMP L5601 BLM18PG121SN1D L5604 NRS6045T100MMGK 10 0uH C5603 1000pF 50V AMP_MUTE_MICOM C5616 1uF 10V Q5600 MMBT3904 NXP AMP_MUTE_MICOM_NXP_TR E B C SPK_R C5611 22000pF 50V AUD_LRCH C5615 390pF 50V WOOFER_MUTE SPK_L 3 3V_NORMAL I2C_SCL1 R5606 3 3 1 10W R5603 100 R5613 4 7K AUD_LRCK R5611 4 7K C5618 0 47uF 50V IC5600 NTP7515 3 NC_2 2 VDD_PLL 4 GND 1...

Page 32: ...6105 33K 1 EXT_HP_OUT C6108 0 1uF 16V EXT_HP_OUT C6105 10pF 50V EXT_HP_OUT C6101 180pF EXT_HP_OUT C6106 1uF 10V EXT_HP_OUT C6107 180pF EXT_HP_OUT HP_LOUT_AMP 3 3V_NORMAL C6104 1uF 10V EXT_HP_OUT HP_ROUT C6109 1uF 10V EXT_HP_OUT C6100 1uF 10V EXT_HP_OUT C6102 1uF 10V EXT_HP_OUT R6106 10K EXT_HP_OUT HP_ROUT_SOC R6102 43K 1 EXT_HP_OUT SIDE_HP_MUTE 3 3V_NORMAL IC6100 TPA6138A2 EXT_HP_OUT 3 OUTR 2 INR ...

Page 33: ...F 50V OPT 3 3V_TU I2C_SCL4 3 3V_TUNER FE_DEMOD1_TS_VAL R6509 33 TU_M W I2C_SCL2_TU I2C_SDA2 TU_SIF_TU FE_DEMOD1_TS_DATA 1 LNB_OUT FE_DEMOD1_TS_DATA 2 FE_DEMOD1_TS_DATA 3 R6505 100 TU_M W IF_P_TU I2C_SCL4_TU FE_DEMOD1_TS_ERROR C6510 0 1uF TU_M W R6510 200 TU_ALL_2178B C6508 0 1uF 16V TU_M W I2C_SCL2 I2C_SDA2_TU C6504 33pF TU_ALL_IntDemod FE_DEMOD1_TS_CLK IF_AGC IF_N_TU FE_DEMOD1_TS_DATA 1 3 3V_TUNE...

Page 34: ...B 8 GND 9 EP GND R6706 1 10 5K TU_M W_1 1V R6402 1 0 TU_H M_CN AJ R6402 22 TU_H M_KR US BR CO TW C6402 1000pF 630V TU_H M W R6401 22 TU_H M_BR CO TW C6409 1000pF 630V TU_H M W C6401 1000pF 630V TU_H M_BR CO TW CN R6401 1 0 TU_CN C6410 1000pF 630V TU_H M W R6403 0 TU_H M_KR US AJ CN TU_GND_A TU_GND_B TDJH G301D TU6401 1 TU_H_AJ 47 SHIELD 6 IF P 7 IF N 8 SIF 9 CVBS 1 3 3V 2 NC_1 3 IF_AGC 4 SCL_RF 5 ...

Page 35: ...LVDS_SEL_HIGH TXBCLKN L7200 UBW2012 121F AUO_SHARP TXB1P TXA4P 3 3V_NORMAL TXB3N TXB4N TXACLKN TXB1N TXB0N R7203 10K BIT_SEL_LOW I2C_SCL1 TXB2P TXA0P R7201 0 VCOM TXACLKP TXB2N TXB4P TXA0N TXA3P TXA4N R7200 0 VCOM TXA2P P7201 10031HR 30 HD_LVDS 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 R7205 3 3K OPT VCOM_SDA VCOM_SCL R7206 10K OPT PANEL_VCC VCOM_SDA VCOM_...

Page 36: ...6 N11 NC_97 N12 NC_98 N13 NC_99 N14 NC_100 P1 NC_101 P2 NC_102 P8 NC_103 P9 NC_104 P11 NC_105 P12 NC_106 P13 NC_107 P14 EMMC_CMD_BALL DAT3 EMMC_CLK C8105 2 2uF 10V EMMC_CMD_BALL AR8101 47 1 16W DAT5 DVDD18_EMMC DAT5 EMMC_RESET_BALL DAT7 DAT4 C8104 0 1uF 16V C8106 1uF 10V DVDD18_EMMC EMMC_VDDI C8102 0 1uF 16V EMMC_RST DAT6 DAT7 3 3V_EMMC DAT4 AR8104 10K 1 16W OPT R8100 10K OPT EMMC_CMD EMMC_CLK_BAL...

Page 37: ...uF RS232C 3 4V_ST VA11200 ADUC 20S 02 010L 20V OPT C11201 0 1uF RS232C R11200 100 RS232C R11201 100 RS232C RIN1 VA11201 20V ADUC 20S 02 010L OPT SOC_TX SOC_RX IC11200 MAX3232CDR EAN41348201 RS232C 3 C1 2 V 4 C2 1 C1 6 V 5 C2 7 DOUT2 8 RIN2 9 ROUT2 10 DIN2 11 DIN1 12 ROUT1 13 RIN1 14 DOUT1 15 GND 16 VCC C11203 0 1uF RS232C JP11204 JP11203 JP11201 JP11202 RS 232C Control INTERFACE A5LR_Bring_Up 2014...

Page 38: ......

Page 39: ...TROUBLE SHOOTING Applicable Model LJ50H LF59 S LT50H LF59 D Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ... power 6 7 Off when on off while viewing power auto on off 7 8 C Audio error No audio Normal video 8 9 Wrecked audio discontinuation noise 9 10 D Function error Normal Motion Remote Controller operating error 10 11 External device recognition error 11 12 E Noise Circuit noise mechanical noise 12 13 F Exterior error Exterior defect 13 First of all Check whether there is SVC Bulletin in GCSC System ...

Page 41: ...k 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 Error symptom A Video error No video Normal audio A5 A4 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS EPI Cable Speaker Cable IR Wi Fi combo cab...

Page 42: ...replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A5 Established date Revised date 2 13 Error symptom Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ... Check Tuner soldering Normal Picture Y N Y Close Y Close By using Digital signal level meter By using Diagnostics menu on OSD Menu Quick Channels 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 Normal Picture Y Close N A7 Standard Repair Process Established date Revised date 3 13 Error symptom ...

Page 44: ...external device and cable Y External device Cable normal HDMI 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 Standard Repair Process Established date Revised date 4 13 Error symptom Copyright ⓒ 2015 LG Electronics Inc All right reserved Only f...

Page 45: ...and HDMI 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 HDMI Request repair for external device Component error HDMI Connect other external device and cable Check normal operation of External Input Component and HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen normal N Y...

Page 46: ...tage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY Voltage D13V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A5 Standard Repair Process Established date Revised date 6 13 Error symptom Stand By Red or No color Close A18 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE...

Page 47: ...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 POWEROFF_U...

Page 48: ...pair parts Check Speaker disconnection N Y Connect Speaker to Main cable Replace MAIN Board End C Audio error No audio Normal video A24 A25 Disconnection Established date Revised date 8 13 Error symptom Standard Repair Process Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ... 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 A13V Voltage Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Esta...

Page 50: ...B D Y A27 Standard Repair Process Established date Revised date 10 13 Error symptom Y Y N 2 Motion Remote control operating error Check Motion R C itself Operation Normal operating Y 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 3 5V_WIFI On Main B D A29 Normal Voltage Close N Check 13V on Power B ...

Page 51: ...fix external device cable HDMI 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 Error symptom Standard Repair Process Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...n proceed 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 noise in the Owners Manual E Noise Circuit noise mechanical noise Established date Revised date 12...

Page 53: ...lace remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 13 13 Error symptom Standard Repair Process Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...ner Checking Part A9 11 Check Link Cable LVDS EPI reconnection condition 12 Adjustment Test pattern ADJ Key A12 13 A Video error_Vertical Horizontal bar residual image light spot connection diagram A8 14 Check Link Cable LVDS EPI reconnection condition 15 Adjustment Test pattern ADJ Key A12 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Con Boa...

Page 55: ...OWER BOARD PIN voltage checking method A18 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 Normal Remote controller operation ch...

Page 56: ...tom Content Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 10 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...ate Error symptom Content Check the DC D13V A13V 12 Pin Power Board Main Board SMAW200 H12S5K 1 Power on 2 PDIM 2 3 GND 4 D13V 5 D13V 6 D13V 7 A13V 8 A13V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Power Board Shape is different of models Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ... 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 Error symptom Content Established date Revised date Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ...ntal 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 ALL MODELS Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...oltage 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ... 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ...older 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ... Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 A 2 5 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ...Exchange LED driver Board PSU No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...ess damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module A 4 5 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ...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 Module itself 2 Un repairable Cases In this case please exchange the module A 5 5 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 68: ...rror _No power A17 Established date Revised date Error symptom Content Be careful LF59 Models have a Standby Light Control UI ST BY condition On Power ON condition Off Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...ical Manual Check power input voltage and ST BY Voltage B Power error _No power A18 Established date Revised date Error symptom Content When st by only D13V is normally on Output 9 5 9 9V Check the DC D13V A13V Power on Power Board Shape is different of models Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ... 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...tion of the Menu 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 Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...tage remove the cable 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 MODELS A25 Established date Revised date Error symptom Cont...

Page 73: ...ve at all Standard Repair Process Detail Technical Manual Normal Remote controller operation checking method D Function error_ No response in remote controller ALL MODELS A27 Established date Revised date Error symptom Content P4000 1 GND 2 3 4V_WIFI 3 M_RESET 4 USB_DM 5 GND 6 USB_DP 7 SDA 8 KEY1 9 SCL 10 KEY2 11 IR 12 3 5V_ST 13 LED_R 14 GND Copyright ⓒ 2015 LG Electronics Inc All right reserved ...

Page 74: ...the 3 5V_WIFI on the terminal 2 4 Check the B T version value Standard Repair Process Detail Technical Manual Motion Remote controller operation checking method D Function error_ No response in remote controller ALL MODELS A29 Established date Revised date Error symptom Content Copyright ⓒ 2015 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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