LG 24LF4520, Service Manual

Page 1: ...rvice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL68127201 1401 REV00 22LB4510 22LB4510 PU 24LB4510 24LB4510 PU LU40A LED TV ...

Page 2: ...s Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 18 EXPLODED VIEW 19 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ... 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 to the chassis the ...

Page 4: ...n your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the 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 electrostatic charge b...

Page 5: ...e 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 replaced...

Page 6: ...tes 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 specification NOTE Specifications and others are subject to change without notice for improvement 4 General specification 4 1 TV 4 2 Feature and Function No Item Specification Remarks 1 Market AMERICA CANADA MEXICO 2 Available Channel 1 Digital A...

Page 7: ...GB HDMI PC No Resolution H freq kHz V freq Hz Pixel clock MHz Remark 1 720 400 31 468 70 080 28 321 2 640 480 31 469 59 940 25 175 3 640 480 37 500 75 000 31 500 4 800 600 37 879 60 317 40 000 5 800 600 46 875 75 000 49 500 6 1024 768 48 363 60 004 65 000 7 1024 768 56 476 70 069 75 000 HDMI PC 8 1024 768 60 023 75 029 78 750 9 1152 864 67 500 75 000 108 000 10 1280 720 45 000 60 000 74 250 11 128...

Page 8: ...2 33 75 59 94 60 74 17 74 25 HDTV 1080I 6 1920 1080 28 125 50 00 74 25 HDTV 1080I 7 1920 1080 27 00 24 74 25 HDTV 1080P 8 1920 1080 33 75 30 00 74 25 HDTV 1080P 9 1920 1080 56 250 50 148 5 HDTV 1080P 10 1920 1080 67 43 67 5 59 94 60 148 35 148 50 HDTV 1080P Component No Specification Remark Resolution H freq kHz V freq Hz 1 720x480 15 73 59 94 720x480i 2 15 73 60 3 720x480 31 47 59 94 720x480p 4 3...

Page 9: ...60 27 00 27 03 SDTV 480P 2 720 576 31 25 50 00 27 864 SDTV 576P 3 1280 720 37 50 50 00 74 250 HDTV 720P 4 1280 720 44 96 45 59 94 60 74 17 74 25 HDTV 720P 5 1920 1080 33 72 33 75 59 94 60 74 17 74 25 HDTV 1080I 6 1920 1080 28 125 50 00 74 25 HDTV 1080I 7 1920 1080 27 00 24 74 25 HDTV 1080P 8 1920 1080 33 75 30 00 74 25 HDTV 1080P 9 1920 1080 56 250 50 148 5 HDTV 1080P 10 1920 1080 67 43 67 5 59 94...

Page 10: ...XX bin by clicking Read 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD epk file download 1 Make New folder named LG_DTV and put ISP file epk in the folder 2 Put the USB Stick to the USB socket 3 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High U...

Page 11: ...Use the proper signal cable for EDID Download Analog EDID Pin3 exists Digital EDID Pin3 exists 3 1 2 22LB4510 RGB Check sum C1 HDMI Checksum 15 F0 3 1 3 24LB4510 RGB Check sum B3 HDMI Checksum 98 EC 3 2 Function Check 3 2 1 Check display and sound Check Input and Signal items cf work instructions 1 TV 2 AV CVBS 3 COMPONENT 480i 4 HDMI Display and Sound check is executed by Remote controller Cautio...

Page 12: ...n inspection 4 4 White balance adjustment Equipment 1 Color Analyzer CA 210 LED Module CH 14 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remocon RGB_Gains are fixed data for each model Insert RS 232C Jack which is connected with PC for White Balance or equivalent device Total Assembly line should be check whether the color coordinate x y data refer to below table were meet o...

Page 13: ... when R G B Gain are all C0 it is the FULL Dynamic Range of Module Note Manual W B process using adjusts Remote control 1 After enter Service Mode by pushing ADJ key 2 Enter White Balance by pushing key at White Bal ance When doing Adjustment Please make circumstance as below 4 5 Model Name SW Version Adjust check Press the Instart key of ADJ remote controller 4 5 1 Model Name SW Version Check 1 C...

Page 14: ...ower Replace X300 N Check C500 Voltage Level 19V Check Power connector OK Replace Adapter Y N Y Check IC501 Output Voltage Level 3 3V Replace IC501 Recheck Y N Check X300 Clock 24MHz Replace IC405 Flash Memory Y Check IC503 Output Voltage Level 5V Replace IC503 Recheck Y N Check IC502 Output Voltage Level 1 15V Replace IC502 Recheck N Y ...

Page 15: ... FFC Cable for Damage or Open Conductors Check LED Driver Output C706 Replace T Con Board or Module Y Check IC300 Replace Main SOC N Check WLED_ENABLE High Y Replace Cable N Module Back Light On Check IC700 Q700 Replace LED Driver IC or FET Y N N Check Panel Power 12V P401 30 Check IC500 Output 12V Replace IC500 Recheck Y N Check Panel input Clock P401 9 10 Check IC300 Repair Main B D Y N Check FF...

Page 16: ...c All right reserved Only for training and service purposes 3 No Video Digital TV Check RF Cable Y 1 Check RF IC L200 Power 3 3V 2 Check IC501 Output voltage 3 3V Replace IC501 Recheck Y N Check SCL SDA Line TU200 3 4 Replace TU200 or IC300 Main Scaler N ...

Page 17: ...or training and service purposes 4 No Video HDMI Replace Main Scaler IC300 Check input signal format Is it supported Check JK100 for proper connection or Damage Replace Connector Y N Check I2C Signal JK100 Re Download EDID Data Y N Y Check HDMI Cable for Damage or Open Connector Y ...

Page 18: ... 18 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 19: ...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 IMPORTANT SAFETY NOTICE 300 200 120 400 910 540 810 LV1 A2 535 820 12...

Page 20: ...UT C110 1000pF 50V HP OUT C108 1uF 10V HP OUT C115 1uF 10V HP OUT R130 100 HP OUT C118 1uF 10V HP OUT C113 1uF 10V HP OUT HP_ROUT C116 180pF 50V HP OUT C117 0 1uF 16V HP OUT HP_ROUT_PWM IC101 TPA6138A2 HP OUT 3 OUTR 2 INR 4 GND_1 1 INR 6 VSS 5 MUTE 7 CN 8 CP 9 VDD 10 GND_2 11 UVP 12 OUTL 13 INL 14 INL R134 43K 1 HP OUT 3 3V 3 3V C103 0 22uF 16V HP OUT C106 0 22uF 16V HP OUT L100 BLM18AG151SN1D HP ...

Page 21: ...07 0 1uF 16V C209 20pF 50V OPT R204 33 TU_SDA C206 18pF 50V C214 100uF 16V 105C OPT R205 33 3 3V_TU IF_AGC DIF_P C255 47uF 6 3V 85C OPT TU200 TDSS H701F 5 B1 3 3V 11 DIF N 2 NC_2 10 DIF P 4 SDA 1 NC_1 9 IF_AGC 8 NC_5 3 SCL 7 NC_4 6 NC_3 12 SHIELD A1 A1 B1 B1 R206 1K R202 33 R203 33 Tuner block 2 M1L 7 2013 07 13 TUNER 60mA 1 should be guarded by ground 2 No via on both of them 3 Signal Width 12mil...

Page 22: ...NC R341 33 D_SUB DSUB_DET IC300 LGE8220 MSD8220LBM 1 RX1N_B 2 RX1P_B 3 RX2N_B 4 RX2P_B 5 AVDD_MOD_1 6 RXCN_A 7 RXCP_A 8 RX0N_A 9 RX0P_A 10 RX1N_A 11 RX1P_A 12 RX2N_A 13 RX2P_A 14 HSYNC0 15 BIN0P 16 SOGIN0 17 GIN0P 18 GIN0M 19 RIN0P 20 VSYNC0 21 AVDD3P3_ADC 22 BIN1P 23 SOGIN1 24 GIN1P 25 GIN1M 26 RIN1P 27 VSYNC1 28 CVBS1 29 CVBS0 30 VCOM 31 CVBS_OUT1 32 VDDC_1 33 AVDD_AU33 34 AUR0 35 AUL0 36 AUR1 3...

Page 23: ...LED_AMBER IR R402 10K OPT JP400 JP410 LED_RED C400 1000pF 50V R417 0 Non CMI 29 R422 0 RXA0 RXACK RXBCK RXA2 JP414 RXB3 RXA1 P402 10031HR 30 FHD_Panel 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 RXB2 RXA1 RXACK RXA2 C404 0 1uF 16V RXA3 RXB1 RXA3 RXB0 RXB2 RXA0 RXA2 5V_PANEL_POWER RXB1 RXACK RXA0 RXACK 12V_PANEL_POWER P401 10031HR 30 HD_Panel 1 2 3 4 5 6 7 8 ...

Page 24: ... OPT R542 100 C515 0 1uF 16V C538 1uF 16V HD_Panel R543 10K 5V R502 47K IC500 MP2315GJ HD 12V Panel 3 SW 2 IN 4 GND 1 AAM 5 BST 6 EN SYNC 7 VCC 8 FB C507 0 1uF 50V 3 3V 3 3V_ST L503 10uH C529 0 1uF 16V C526 10uF 10V OPT C506 0 1uF 50V HD 12V Panel R513 10K Q502 PMV48XP G D S IC501 MP2315GJ 3 SW 2 IN 4 GND 1 AAM 5 BST 6 EN SYNC 7 VCC 8 FB C527 10uF 10V 5V R507 68 19V Q501 MMBT3904 NXP E B C C500 47...

Page 25: ...00M Audio_Coil_ABCO 10uH C618 680pF 50V L602 1 NRS6045T100MMGK OPT Audio_Coil_TAIYO 10 0uH P_AMP_SDA L603 LPH6045T 100M Audio_Coil_ABCO 10uH C619 680pF 50V AMP_RESET_N 3 3V_ST 3 3V 3 3V 3 3V R613 470 DIP DETECTION Q601 MMBT3906 NXP DIP DETECTION E B C 19V C628 47uF 25V 105C DIP DETECTION SB_MUTE R615 12K DIP DETECTION D601 KDS226 DIP DETECTION A AC C R614 12K OPT D600 MMBD6100 A2 C A1 SB_MUTE AMP_...

Page 26: ...D CMI_29 S D G M703 C708 0 047uF 25V LGD FHD CMI 24 R715 30K 1 LGD FHD CMI C701 1000pF 50V LGD FHD CMI M701 R720 0 CMI_29 JP703 R700 100K 1 LGD FHD CMI C709 0 1uF 250V CMI_29 R702 1 270K 1 8W 1 CMI_29 C789 33uF 100V 55TO 105C CMI_29 R722 0 CMI_29 R703 1 5K 1 LGD FHD CMI R703 1 3K 1 CMI_29 M705 R727 0 LED_CH2 M704 M700 M708 M702 C705 1uF 25V LGD FHD CMI R702 510K 1 8W 1 LGD FHD CMI 24 P700 12507WR ...

Page 27: ... 50V CMI_29 Q801 AOD478 21 6 26 27 5 29 Panel S D G JP802 19V R803 10K 1 16W 21 6 26 27 5 29 Panel WLED_DIM_ADJ 24V_BLU C804 1 470pF 50V CMI_29 WLED_ENABLE C809 1uF 10V OPT R808 1K 1 24V_Panel MULTI_ON R814 1 18K 1 16W 1 CMI_29 P800 SM14B SRSS TB 24V 24V 24V 24V 24V GND GND GND GND GND ERROR_OUT INV_ON NC PWN_DIM GND LGD 21 6 26 Connector 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 R802 0 OPT First_output...

Page 28: ...NC_1 7 NC_2 8 GND_2 9 NC_3 10 NC_4 JP901 CEC_REMOTE 5V_DET_HDMI_2 D900 RCLAMP0524PA OPT ESD_HDMI_SEMTECH DEV 1 8 2 7 3 6 4 5 9 10 D2 _HDMI2 5V_HDMI_2 R910 10K MT55_HDMI1 JP900 R912 47K MT55_HDMI1 C900 220pF 50V AUDIO_IN JK901 EAG61491201 MT55_HDMI1 14 13 5 D1_GND 20 SHIELD 12 11 2 D2_GND 19 18 10 CK 4 D1 1 D2 17 9 D0 8 D0_GND 3 D2 16 7 D0 6 D1 15 Q901 MMBT3904 NXP MT55_HDMI1 E B C JP902 VA902 20V ...

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