AOC LE20A1140 Service Manual Download Page 19 | Manualshive

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19

5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and
the power is “ON”?

Power “On”

Check the IR board and LED

Replace the IR board

Replace the main board

Power board

output=5.2V?

Replace the power board

No

Yes

No

Yes

No

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Summary of Contents for LE20A1140

Page 1: ...ESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES CAUTION USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING 6 1 Main Board 25 6 2 Power B...

Page 2: ...ht create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from AOC AOC assumes no liability express or implied arising o...

Page 3: ...3 Revision List Version Release Date Revision Instructions Customer Model TPV Model A00 Feb 24 2014 Initial release LE20A1140 E20D41NSBTE7NN E20D41NSBTE6NN...

Page 4: ...4 1 General Specification...

Page 5: ...5 2 Operating Instructions 2 1 The Use of Remote Control...

Page 6: ...6 2 2 To Use the Menus...

Page 7: ...7...

Page 8: ...8...

Page 9: ...9...

Page 10: ...10...

Page 11: ...11 2 3 How to Connect...

Page 12: ...12...

Page 13: ...13 2 4 Front Panel Control Knobs...

Page 14: ...6 Red GND 6 TMDS Data1 6 TMDS Data1 7 Green GND 7 TMDS Data0 7 TMDS Data0 8 Blue GND 8 TMDS Data0 shield 8 TMDS Data0 shield 9 5V supply from PC 9 TMDS Data0 9 TMDS Data0 10 Sync GND 10 TMDS Clock 10...

Page 15: ...15...

Page 16: ...16 4 Mechanical Instructions 1 Remove the screws to remove STAND BASE 2 Remove the screws to remove REAR COVER...

Page 17: ...17 3 Disconnect the PINS marked in yellow Remove the screws marked in red to remove MAIN BOARD POWER BOARD and SPEAKERS 4 Remove the screws to remove DECO and disconnect the pin to remove the IR Board...

Page 18: ...18 5 Remove the screws to remove BKT 6 Panel...

Page 19: ...Chart 1 No power No power LED Off Check the AC input and the power is ON Power On Check the IR board and LED Replace the IR board Replace the main board Power board output 5 2V Replace the power board...

Page 20: ...lue Replace the main board Replace the Power board No Yes No Yes No No Power board output 16V Check the power key is under control Check the IR receiver is normal Replace the power board Replace the m...

Page 21: ...play Reset the source Check the source Check the panel Replace the main board Replace the LVDS cable Replace the panel No No No Yes Yes Yes No No Check the main board Enter factory mode to do EEPROM i...

Page 22: ...the Panel No display No LED Replace the main board Check the backlight is On Check the LVDS cable Reinsert or replace the LVDS cable Replace the main board Replace the Panel No Yes Yes No Yes No No Y...

Page 23: ...e or enter the menu to reset Reinsert the audio cable or change the TV system Replace the cable Replace the speaker Replace the main board No Yes Check the speaker resistance value is in spec Remark T...

Page 24: ...unction Replace the battery Replace the remote control Whether the IR board is abnormal Yes No Replace the IR board Replace the main board No Yes No Yes Use the other remote controls Check the remote...

Page 25: ...25 6 PCB Layout 6 1 Main Board 715G5749M03001004K...

Page 26: ...26...

Page 27: ...27 6 2 Power Board 715G5804P01W20001M...

Page 28: ...28...

Page 29: ...29...

Page 30: ...30 6 3 IR Board 715G5772R01000004K...

Page 31: ...r Temp Normal b Adjust gain of RGB to meet spec in the below setting of tim pat COMPONENT mode TIM 314 PAT 141 80IRE 3 Check the colour temperature of other Source If the colour temperature can t meet...

Page 32: ...ot directory Step2 TV Power On Step3 Insert USB to TV then AC off on Step4 Presses Menu 456987 Recall click yes TV auto upgrade After USB F W update OK TV will power off Step5 Power on press Menu 1999...

Page 33: ...CVBS DTV DEMOD MSB1400 Single terminal silicon tuner LG TDST H020F Series TS Analog IF RGB Headphone AMP LVDS AUDIO AMP APA2176A L R 5W SPK 5W SPK R L Remote Control KeyPad AV Audio USB L R ATV DEMOD...

Page 34: ...wer 1A 500mA 5V_NORMAL PANEL_VCC 1V2 P12V Without panel 3 5A LDO 3 3V_STANDBY G9141 150mA DC DC 170mA USB Power 1 18 5 23 6 audio current 3W 2 75 8W 12V current 8W 12V 0 67A 2 29 32 audio current 5W 2...

Page 35: ...H 5V_Standby 1 2V_VDDC Vout 0 8 1 R1 R2 R1 073G253S 68 H MST6931 Core Power 1 26V 650mA BL_EN High active R714 1K R706 NC 10K C713 100UF 16V ZD701 NC BZT52 C5V6 1 2 NC 4 7UF 10V C706 R702 1K R710 4 7K...

Page 36: ...MID_D0 8 HDMID_D0 8 HDMID_D1 8 HDMID_D1 8 TP74 HDMID_D2 8 HDMID_D2 8 AMP AUOUTR0 HDMID_CLK 8 TP75 HDMID_CLK 8 HDMID_DDC_SDA 8 TP76 HDMID_DDC_SCL 8 HOTPLUGD 8 HDMIA_D0 8 HDMIA_D0 8 TP77 HDMIA_D1 8 HDMI...

Page 37: ...5R C452 100N 16V Master Panel Connector For LCM290XX R443 10K R444 10K 30 1 CN403 CONN 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40...

Page 38: ...1 2 3 4 6 5 R113 33R 100N 16V C124 C104 NC 1uF 10V R115 NC 75R R119 10K R127 USB IN R724 100K USB0_DP USB0_DM ZD118 NC MLVG0402 1 2 R111 33R Q101 NC MMBT3904 U704 APL3511CBI TRG VOUT 1 GND 2 OCB 3 EN...

Page 39: ..._D1 HDMIA RX2P HDMID RX1P HDMIA_D2 5 HDMIA_CLK 5 HDMIA_DDC_SCL HDMI CEC V T H 8 5mm HDMID_CLK 5 HDMID_D1 HDMI_A with ARC function HDMID_D0 HDMI ARC HDMIA_D2 HDMID_D1 Q502 MMBT3904 HDMIA_D2 HDMID_D0 R5...

Page 40: ...5 R466 NC 10K 1 16W 5 R1136 NC 22K 1 16W R1134 NC 33K 1 16W R1144 NC 22K 1 16W IRRX1 R1135 NC 10K CN118 NC CONN 1 2 3 4 5 R4012 NC 10K R1060 NC 0R05 OHM IR_DET_SW 3 3V_Standby R1140 NC 100R 1 16W 5 SW...

Page 41: ...R731 0 05R 3 3V_TUNER 5V_Normal Close to Tuner R733 0 05R C140 NC 100N 16V 3 3V_TUNER R156 0R05 1 16W C454 1NF 50V Demod M_SCL R155 0R05 1 16W IF_AGC Demod M_SDA R496 0R05 1 10W Tuner LG TDST H030F C1...

Page 42: ...r DTV U163 NC G692L293TCUf 2 91V GND 1 RESET 2 VCC 4 MR 3 R487 10K f or DTV R486 NC 10K TS_CLK I2C_SDA 3 3V Demod M_SDA 10 Demod M_SCL 10 R471 1M 1 10W f or DTV R474 1 2K 1 16W f or DTV C457 18PF 50V...

Page 43: ...22 3 32K 1 R624 6 8K 1 ADO_GND ADO_GND ADO_GND R612 100OHM R625 100OHM AV_R_OUT L C630 330pF 50V R620 10 OHM 1 4W C638 100N 50V C639 1NF 50V C620 0 22uF 50V C626 330pF 50V C631 1UF 50V C628 0 22uF 50V...

Page 44: ...2uF 10V R736 10K AV_AUOUTR3 5 AV_AUOUTL3 AV_AUOUTR3 HP_OUT_L 7 HP_OUT_R 7 AV_AUOUTL3 5 HP_OUT_R HP_OUT_L C643 100N 16V APA2176A U606 NC 13 PVDD 16 NC 4 CP 1 PGND 2 CP 3 CVSS 5 VSS 6 LOUT 7 VDD 8 ROUT...

Page 45: ...50V NC 16V R9131 1K OHM 5 1 8W C9119 100N 50V R9107 82K OHM 1 D9113 SR510 22 1 2 D9105 FR107 IC9103 AS431AN E1 065G 1K222 2T6921 PITHC5 0 125 PITCH 7 5mm 065G 1K22293S SG9901 DSPL 501N A21F NC R9121 4...

Page 46: ...MPER 095G 90 23 5 2V CN8104 LNT D8102 1N4148W 16V VADJ VBJT SLP C8108 10N 50V R8101 51K 1 8W 1 R8122 10R5 1 R8123 10R5 1 R8124 10R5 1 VLED 311AF050 H10 ABB R8125 10R5 1 Q8103 2N3904 Q8102 2N3904 R8103...

Page 47: ...K 1 10W 5 R301 2K2 1 10W 5 LED301 LED 1 2 Red The item of LED function start from 301 315 The item of IR function start from 201 215 The item of key fumction start from 001 015 CN201 CONN 1 2 3 4 5 6...

Page 48: ...48 10 Exploded View...

Page 49: ...ARD 1 5 378G0060566HBE 8 OHM 6W 100 x 27 0 UNIT 2 6 X15T905110100000BL BKT_MID 1 7 Q52G18010TV18200ZA INSULATING SHEET 1 8 CBPFD3QSX5Q MAIN BOARD 1 9 X15T905230100000LH BKT_IO 1 10 X40G2013020X0700XY...

Page 50: ...TAPE Y1200141 Q45G 77511 PROTECT BAG Q50G 4 10 TIE Y1900221 E750 750GBV195100B6N000 LCD TPM195WD1 RTN01 000B WH TPV 2nd Source 756TXDCB01S034002Q MCU ASSY SMTF U402 100TAMVA001S2X MCU ASSY 356G223307...

Page 51: ...NK CN401 033G803210F HR CONNECTOR 10P 1 25 U703 056G 133 30AAC DC DC AZ1117H ADJ E1 1A adj SOT 223 U166 056G 563149 IC G903T63UF 0 6A 3 3V SOT 223 U702 056G 563515 LDO AZ1117D 3 3TR E1 1A 3 3V TO 252...

Page 52: ...RST 0402 0 05R MAX 1 16W R623 061G0402100 JF RST CHIPR 10 OHM 5 1 16W FENGHUA R626 061G0402100 JF RST CHIPR 10 OHM 5 1 16W FENGHUA R621 061G0402100 JF RST CHIPR 10 OHM 5 1 16W FENGHUA R721 061G040210...

Page 53: ...04 JF RST CHIPR 100KOHM 5 1 16W FENGHUA R413 061G0402104 JF RST CHIPR 100KOHM 5 1 16W FENGHUA R154 061G0402104 JT RST CHIP 100K 1 16W 5 TZAI YUAN R153 061G0402104 JT RST CHIP 100K 1 16W 5 TZAI YUAN R6...

Page 54: ...4K7 1 16W 5 TZAI YUAN R491 061G0402472 JT RST CHIP 4K7 1 16W 5 TZAI YUAN R422 061G0402472 JT RST CHIP 4K7 1 16W 5 TZAI YUAN R2917 061G0402472 JY RST 0402 4 7K 5 1 16W RC0402JR 074K7L R780 061G0402473...

Page 55: ...R C424 065G040210412K Y CAP 0402 100NF 10 16V X7R C428 065G040210412K Y CAP 0402 100NF 10 16V X7R C714 065G040210412K Y CAP 0402 100NF 10 16V X7R C422 065G040210412K Y CAP 0402 100NF 10 16V X7R C701 0...

Page 56: ...131J T AP CHIP 0402 330PF 50V J NPO C630 065G040233131J T AP CHIP 0402 330PF 50V J NPO C623 065G040233131J T AP CHIP 0402 330PF 50V J NPO C118 065G040247131J A CAP CHIP 0402 470PF J 50V NPO C119 065G0...

Page 57: ...AP 0805 220NF 10 50V X7R C723 065G080522605M A CAP 0805 22UF 20 6 3V X5R C719 065G080522605M M CAP 0805 22UF 20 6 3V X5R C720 065G080522605M M CAP 0805 22UF 20 6 3V X5R C709 065G080522605M M CAP 0805...

Page 58: ...EC SMD 100uF 35V 20 35V 6 3x7 7 2000 hr X401 393G022SA3400H CRYSTAL X3S024000DC1H HU 20 12pF 709T57490XS001 COMSUMPTIVE ASSY 055G 100610 TIN CREAM W O PB Q52G6026 7 mesh printting paper E715 715G5749...

Page 59: ...SR515 04 X0G 5A 150V DO 201AD 0Q1G 340 8140 SCREW Q1 SELF TAPING SCREW Q x8 0 CN9904 311GW250B13BBX WAFER 2 5mm 13P R A 35mm 7mm RV9901 361G0046621KZE VARISTOR 620V 10 NR9902 361G0058159LAW005A NTCR 1...

Page 60: ...GHUA R8108 061G0805201 JT RST CHIPR 200OHM 5 1 8W TZAI YUAN R8104 061G0805220 JF RST CHIPR 22 OHM 5 1 8W FENGHUA R8104 061G0805220 JT RST CHIPR 22OHM 5 1 8W TZAI YUAN R8105 061G0805229 JF RST CHIPR 2R...

Page 61: ...06682 JF RST CHIPR 6 8KOHM 5 1 4W FENGHUA R9101 061G1206682 JF RST CHIPR 6 8KOHM 5 1 4W FENGHUA R9103 061G1206682 JF RST CHIPR 6 8KOHM 5 1 4W FENGHUA R9101 061G1206682 JT RST CHIPR 6 8 KOHM 5 1 4W TZA...

Page 62: ...7 Q8101 357G0763A03 MOSFET EMBA0N10G 5A 100V 3W SO8 R8121 361G08051059FT RST 0805 10R5 1 1 8W SMD080510R5F R8125 361G08051059FT RST 0805 10R5 1 1 8W SMD080510R5F R8123 361G08051059FT RST 0805 10R5 1...

Page 63: ...FB9905 071G 55 29 FERRITE BEAD C9908 065G306K22123R CAP Y1 220PF 10 250V Y5P C9102 006G 31502 EYELET L9901 006G 31502 EYELET Q8105 057G 417513 T TRA 2N3904 TO 92 D9103 093G 6026T52T CTIFIER DIODE FR1...

Page 64: ...0 250V Y5P CT7 Y1 250V 06 C9907 065G306K1012WR CAP Y1 100PF 10 250V Y5P CT7 Y1 250V 06 P33T0604ALD01C0100 LENS TV20W9aa51 P34T1027ADT01L0100 STAND TV20W9aa51 NA NA P34T1028ADT01L0100 BASE TV20W9aa51 N...

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