LG 22LN45 Series Service Manual Download Page 1

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Printed in Korea

P/NO : MFL67651304 (1303-REV00)

CHASSIS : LC31A / LD31T

MODEL : 22LN45**

22LN45**-Z*

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

Summary of Contents for 22LN45 Series

Page 1: ...D31T MODEL 22LN45 22LN45 Z 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: ...s Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 15 BLOCK DIAGRAM 19 EXPLODED VIEW 20 SCHEMATIC CIRCUIT DIAGRAM ...

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

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

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

Page 6: ...inland Netherlands Belgium Luxemburg Greece Denmark Czech Austria Hungary Swiss Croatia Turkey Norway Slovenia Poland Ukraine Portu gal Ireland Morocco Latvia Estonia Lithania Rumania Bulgaria Russia SlovakiaBosnia Serbia Albania Kazakhstan Belarus 4 Country Nordic option EU model only Denmark Finland Norway Sweden DTV MPEG2 4 DVB T2 8 countries UK Denmark Sweden Finland Norway Ireland Ukraine Kaz...

Page 7: ...s s to 7 2Msymbols s Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S S2 symbolrate DVB S2 8PSK QPSK 2 45 Msymbol s DVB S QPSK 2 45 Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 4 Scart Jack 1EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT analog 5 Component Input 1EA Y Pb Pr 6 CVBS Input 1EA PAL SECAM NTSC 4 System Rear PAL SECAM NTSC PA...

Page 8: ... 1280 800 49 702 59 810 83 500 10 1366 768 47 717 59 79 85 5 5 2 HDMI DTV No Specification Remark Resolution H freq kHz V freq Hz Pixel clock MHz 1 720 480 31 469 31 5000 59 940 60 000 27 000 27 030 SDTV 480P 2 720 576 31 250 50 000 27 864 SDTV 576P 3 1280 720 37 500 50 000 74 250 HDTV 720P 4 1280 720 44 960 45 000 59 940 60 000 74 170 74 250 HDTV 720P 5 1920 1080 33 720 33 750 59 940 60 000 74 17...

Page 9: ...625I 50Hz 4 720 480 31 470 59 940 27 000 SDTV 480P 5 720 480 31 500 60 000 27 027 SDTV 480P 6 720 576 31 250 50 000 27 000 SDTV 576P 50Hz 7 1280 720 44 960 59 940 74 176 HDTV 720P 8 1280 720 45 000 60 000 74 250 HDTV 720P 9 1280 720 37 500 50 000 74 250 HDTV 720P 50Hz 10 1920 1080 33 720 59 940 74 176 HDTV 1080I 11 1920 1080 33 750 60 000 74 250 HDTV 1080I 12 1920 1080 28 125 50 000 74 250 HDTV 10...

Page 10: ...K 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 USB data is automatically detecting 4 Show the message Copying files from memory 5 Updating is sta...

Page 11: ... push the INSTOP key after completion if the function inspection 3 3 CI key writing process Device CN 3 3 1 Communication Port Connection Connection PCBA USB Port USB to Serial Adapter UC 232A RS 232C cable PC RS 232C port Caution LD31Q LD31A chassis support only UC 232A driver only use this one 3 3 2 CI Key Download 1 Set CI Key path Directory at Start Mac CI Download Programme 2 Set COM 1 2 3 4 ...

Page 12: ...er D L 1 Press Power on key of service remote control 2 Connect RS232 Signal Cable to RS 232 Jack 3 Write Model Name Serial Number by use RS 232 4 Must check the serial number at the Diagnostics of SET UP menu Refer to below 4 2 2 Method notice 1 Model Name Serial Number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Serial number D L must b...

Page 13: ... 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remote control 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 or not Cool Panel Note x y coordinates are drifted about 0 007 after 30 mins heat run ...

Page 14: ...rsion Adjust check Press the Instart key of ADJ remote control 4 6 1 Model Name SW Version Check 1 Check Model Name 2 Check S W Version Refer to the IC Ver in the BOM 4 6 2 Adjust Check 1 Check Country Group 2 Check Area Option 3 Check Tool Option Refer to the BOM Comments 4 Check Adjust ADC Comp RGB is OK 5 Check EDID RGB HDMI is OK After check all Press the EXIT key of ADJ remote control to go o...

Page 15: ...nnector OK Replace Adapter N N Check IC802 output Voltage Level 12V Replace IC802 Recheck N Check IC809 Output Voltage Level 3 3V_ST Replace IC809 N Y Check IC810 Output Voltage Level 2 5V Replace IC810 N Y Y Y Y Check IC807 Output Voltage Level 1 5V Replace IC807 N Y Check IC806 Output Voltage Level 1 15V Replace IC806 N Check X201 Clock 24MHz Replace X201 N Replace IC100 Flash Memory Y ...

Page 16: ...ace T con Board or module Check FFC Cable for damage or open conductors Replace Cable N Y Y Y Check LED Driver output LED Driver B d P1101 1 2 3 4 9 10 11 12 Check LED Driver IC1100 Replace LED Driver IC N Y 3 No Video Digital TV Check RF Cable Check Tuner TU2603 Data CLK SYN VAL Replace Tuner TU2603 Recheck Y N 1 Check Tuner TU2603 5 Power 3 3V 2 Check IC803 Output voltage 3 3V Replace IC803 Y N ...

Page 17: ...ck Component Cable Wave form of C220 Wave form of C218 Wave form of C222 Wave form of Comp Y Wave form of Comp Pb Wave form of Comp Pr 5 No Video RGB Check input signal format Is it supported Check Hsync Vsync R4024 R4025 Replace R4024 R4025 Check signal RGB R228 R230 R232 C204 C206 C208 N Check JK400 Replace JK400 or Check Device Y N Y Replace R228 R230 R232 C204 C206 C208 N IC101 has problem Y C...

Page 18: ...connector Check I2C Signal JK500 501 15 16 Re download EDID data Y N Check HDCP Key IC101 Replace Scaler IC101 N 7 No Audio Make sure you can t hear any audio and Device support the audio signal normally Check Speaker and its wire connection P700 and the resistance Check Signal from IC700 L700 L701 L706 L709 Y Replace IC700 N Check R4045 Voltage Level 3 3V Y Replace IC807 3 3V N Y Check Signal fro...

Page 19: ...3 SDRAM 1GB NAND Flash 1GB 74LCX244 Buffer IC501 CI_CLK CI_VIAL Error CI_SYNC CI_DATA 0 7 CI ADDR 0 7 PCM_DATA 0 7 PCM_A 0 7 CI_ADDR 0 14 REG CI_OE CI_IORD CI_IOWR CI WE PCM_A 0 14 FE_DE_SDA SCL SERIAL Flash CVBS Scart RGB TV L R Sound F_RB PF OE PF_CEO SPI_CK SPI_CI SPI_CS SPI_DO DDR2 Data 0 15 DDR2 Address 0 12 DDR2 Data 0 15 DDR2 Address 0 12 System EEPROM EEPROM SCL SDA Panel DMB LED Driver IC...

Page 20: ... 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 IMP...

Page 21: ...PIO70 N23 PWM2 GPIO71 P22 PWM3 GPIO72 R21 PWM4 GPIO73 P20 PWM_PM GPIO197 F6 SAR0 GPIO34 H6 SAR1 GPIO35 G5 SAR2 GPIO36 G4 SAR3 GPIO37 J5 SAR4 GPIO38 J4 VSYNC_LIKE GPIO146 R23 SPI1_CK GPIO199 R24 SPI1_DI GPIO200 R25 SPI2_CK GPIO201 T21 SPI2_DI GPIO202 T22 NF_CE1Z GPIO141 AE18 NF_WPZ GPIO196 AC17 NF_CEZ GPIO140 AD18 NF_CLE GPIO139 AC18 NF_REZ GPIO142 AC19 NF_WEZ GPIO143 AD17 NF_ALE GPIO144 AE17 NF_RB...

Page 22: ...0P M3 BIN0M M2 SOGIN0 M1 HSYNC1 V2 VSYNC1 V3 RIN1P U3 RIN1M U2 GIN1P T1 GIN1M T2 BIN1P R2 BIN1M R1 SOGIN1 T3 HSYNC2 AA2 RIN2P Y2 RIN2M AA3 GIN2P W2 GIN2M Y3 BIN2P V1 BIN2M W3 SOGIN2 W1 CVBS0 AA8 CVBS1 Y4 CVBS2 W4 CVBS3 AA5 NC_5 Y5 NC_7 AA4 NC_6 Y6 CVBSOUT1 AA1 VCOM AB4 NC_8 AC4 NC_9 AD3 IP AC3 IM AE3 SIFP AD4 SIFM AC5 IF_AGC AD2 RF_AGC AE2 I2C_SCKM1 GPIO78 AE6 I2C_SDAM1 GPIO79 AD6 XIN AD1 XOUT AC1...

Page 23: ...0 AP2191DSG 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC USB_OCD USB_DP 1 AL7 VA407 20V OPT DSUB_G R400 75 DSUB_VSYNC 2 E18 C414 220pF 50V JP408 R431 0 OPT VA425 20V OPT JP401 Q400 MMBT3904 NXP E B C 5V_USB VA403 5 5V R413 10K JP409 R406 0 OPT R403 0 OPT R445 15K R435 10K R409 1K VA420 20V R420 0 OPT C401 18pF 50V OPT JP403 3 3V_Normal JP410 C419 47pF 50V JK400 SPG09 DB 010 1 RED 2 GREEN 3 ...

Page 24: ...4500 D1 _HDMI1 HPD2 R501 10K VA502 20V R533 20K LN4500 VA506 OPT 5 6V HDMI_ARC CK _HDMI1 HDMI_CEC R527 0 HDMI2_ARC DDC_SDA_1 D1 _HDMI1 R503 47K R535 2 7K LN4500 Q502 MMBT3904 NXP E B C D1 _HDMI2 R526 0 HDMI1_ARC R529 10K MN33D Q503 MMBT3904 NXP OPT E B C R536 0 MHL_NEW VA504 OPT D507 RCLAMP0524PA ESD_HDMI_SEMTECH DEV 1 8 2 7 3 6 4 5 9 10 D1 _HDMI2 Q507 LN4500 E B C DDC_SCL_2 Q505 MMBT3904 NXP MN33...

Page 25: ...9 C602 100pF 50V OPT KEY_SCL R618 22 IR_OUT Q603 MMBT3904 NXP IR_OUT E B C R620 0 OPT JP600 D601 20V JP608 R616 3 3K R610 330 R628 0 JP611 R629 0 LGD RXA0 RXA1 C605 0 1uF 50V 12V_PANEL_POWER R626 4 7K RXA2 RXA3 JP612 RXACK R624 4 7K RXA2 R625 4 7K RXA1 D600 20V P601 10031HR 30 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 RXACK RXA0 R627 4 7K RXA3 C607 1000pF ...

Page 26: ..._VCC R713 1K TP700 Q701 MMBT3904 NXP E B C TP701 C722 22000pF 50V R704 12 AMP_SCL 0 1uF C738 50V C742 4 7uF 50V R703 100 C708 33pF 50V JP705 R717 12 R728 5 1K HP_LOUT Q705 MMBT3904 NXP E B C HP_MUTE R730 5 1K Q703 MMBT3904 NXP E B C C723 22000pF 50V C703 0 01uF 50V OPT VA701 20V AMP_RST C730 390pF 50V Q706 MMBT3906 NXP E B C 0 1uF C712 50V Q700 MMBT3904 NXP E B C R715 12 3 3V_AMP 0 1uF C740 50V 0 ...

Page 27: ... 7K C858 10uF 10V OPT 2 5V_Normal R839 4 7K R902 0 C896 10uF 10V R811 100K 1 OPT C817 0 1uF 50V OPT C805 10uF 10V Q807 AO3407A G D S L805 10uH R822 1 8K C801 10uF 25V OPT C855 47uF 25V PANEL_CTL R872 1 19V C852 47uF 25V C832 4700pF 50V R830 0 R879 0 R874 100 R821 12K C840 10uF 10V R835 120K 1 POWER_ON OFF1 C837 0 1uF 50V R878 0 MULTI_ON IC805 AP1117E18G 13 2 OUT 3 IN 1 ADJ GND R880 10K R841 2K 1 C...

Page 28: ...2uF 16V 24V_BLU C1111 100pF 50V C1138 1uF 50V C1131 1uF 10V MULTI_ON WLED_DIM_ADJ Q1103 AOD478 S D G JP1106 C1112 47uF 25V C1137 1uF 50V R1137 0 1 1W 1 JP1100 R1133 1 5K 1 JP1102 R1134 30K 1 R1115 0 1 1W WLED_ENABLE C1135 68uF 35V R1135 1 5K 1 R1106 1 5K 1 16W R1136 0 JP1105 C1120 47pF 50V R1105 10K 1 16W C1119 100pF 50V R1114 0 1 1W VOUT C1121 4 7uF 50V R1124 1 5K 1 R1101 4 7K R1123 100K 1 R1100 ...

Page 29: ...SS_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 F9 VSSQ_8 G1 VSSQ_9 G9 B MDQSUB C1203 0 1uF B MA6 A MBA1 A MA7 B MCASB B MDQU0 B MDQSU A MA4 A MA12 A MA0 A MA11 R1237 56 1 B MDQU7 R1225 1K 1 A MVREFDQ A MA1 R1236 56 1 C1227 10uF IC101 MSD804KKX S7LR M_NON_MS10 A_DDR3_A 0 A11 A_DD...

Page 30: ... 3 3 3V_CI CI_DATA 0 7 CI_IORD AR1905 33 FE_TS_VAL_ERR CI_MCLKI R1903 10K C1909 0 1uF CI_TS_CLK CI_OE Q1901 MMBT3904 NXP E B C GND PCM_IORD AR1901 33 GND CI_MDI 2 PCM_A 4 R1928 10K CI_ADDR 8 CI_OE AR1908 33 CI_MDI 0 5V_Normal 5V_Normal R1914 22K GND R1920 100 PCM_5V_CTL CI_MIVAL_ERR PCM_A 6 CI_MDI 5 R1908 100 R1913 10K CI_ADDR 3 PCM_RST CI_TS_DATA 6 AR1913 33 AR1903 33 CI_MDI 7 CI_MISTRT 5V_CI_ON ...

Page 31: ...uF 16V C2628 100uF 16V OPT R2610 TU_I2C_NON_FILTER 33 C2604 0 1uF 16V C2622 0 1uF 16V R2610 1 MLG1005SR27JT TU_I2C_FILTER TU2600 TDSS G501D 5 3 3V 11 DLIF N 2 RESET 10 DLIF_ P 4 SDA 1 NC 9 IF_AGC 8 ALIF_ P 3 SCL 7 1 8V 6 ALIF_ N 12 SHIELD A1 A1 B1 B1 3 3V_TU R2619 82 A_DEMODE R2608 0 C2652 20pF 50V TU_SCL LNA2_CTL R2616 4 7K A_DEMODE 1 8V_TUNER R2602 0 3 3V_TU C2624 0 1uF 16V OPT C2607 20pF 50V TU...

Page 32: ...C1_L_IN R2828 470 SCART JACK C2816 0 1uF OPT EU_SCART mute R2842 1K 3 3V_Normal Q2804 MMBT3906 NXP OPT EU_SCART mute 1 2 3 R2840 2K OPT EU_SCART mute JP2803 3 3V_ST D2814 20V L2808 1 0 SCSRT_NON_ADC_FILTER C2826 47pF 50V COMP_ADC_FILTER R2818 12K SCART JACK D2811 20V SCART JACK R2805 470K SCART JACK L2805 1 0 COMP_NON_ADC_FILTER R2833 12K R2845 220K SCART JACK R2825 470K R2812 10K SCART JACK D2802...

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