AOC L26AS73 Service Manual
AOC L26AS73 Service Manual

AOC L26AS73 Service Manual

26" lcd tv

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26" LCD TV
Service
Service
Service
Description
Table Of Contents......................................................1
Important Safety Notice..................................................2
1. Monitor Specification...................................................4
2. Operating Instructions............................................6
2.1 The Use Of Remote Control....................................6
2.2 OSD Operations....................................................8
2.3 Control Knobs and Connection................................13
3. Mechanical Instructions..........................................15
4. Repair Flow Chart ..............................................19
6. PCB Layout.........................................................24
6.1 Main Board..............................................................24
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
6.2 Power Board......................................................26
6.3 Key Board............................................................29
6.4 IR Board.............................................................29
7. Block Diagram........................................................30
8. Schematic Diagram.......................................... 31
8.1 Main Board.....................................................31
8.2 Power Board...........................................................39
8.3 Key Board............................................................40
8.4 IR Board........................................................41
9.Exploded View......................................................42
10.BOM List................................................................43
SAFETY NOTICE
1
AOC L26AS73
Page

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Summary of Contents for AOC L26AS73

  • Page 1: Table Of Contents

    26″ LCD TV AOC L26AS73 Service Service Service TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 6.2 Power Board………..…........26 Important Safety Notice........……..2 6.3 Key Board….…..……....…......29 1. Monitor Specification........………..4 6.4 IR Board………..…..........29 2. Operating Instructions……………...……….………..6 7. Block Diagram..……….….........30 2.1 The Use Of Remote Control..……………....6 8.
  • Page 2: Important Safety Notice

    AOC L26AS73 Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
  • Page 3 26″ LCD TV AOC L26AS73 Revision List Version Release Date Revision Instructions TPV Model Apr-16-2008 Initial Release E267M1NM2WSDNN...
  • Page 4: Monitor Specification

    26″ LCD TV AOC L26AS73 1. Monitor Specification...
  • Page 5 26″ LCD TV AOC L26AS73...
  • Page 6: Operating Instructions

    26″ LCD TV AOC L26AS73 2. Operations Instructions 2.1 The Use Of Remote Control...
  • Page 7 26″ LCD TV AOC L26AS73...
  • Page 8: Osd Operations

    26″ LCD TV AOC L26AS73 2.2 OSD Operations...
  • Page 9 26″ LCD TV AOC L26AS73...
  • Page 10 26″ LCD TV AOC L26AS73...
  • Page 11 26″ LCD TV AOC L26AS73...
  • Page 12 26″ LCD TV AOC L26AS73...
  • Page 13: Control Knobs And Connection

    26″ LCD TV AOC L26AS73 2.3. Control Knobs and Connection 2.3.1 Front panel control knobs...
  • Page 14 26″ LCD TV AOC L26AS73 2.3.2 Back panel connection...
  • Page 15: Mechanical Instructions

    26″ LCD TV AOC L26AS73 3. Mechanical Instructions Step Figure Description Remove Remove the 4 base and screws stand Remove the Remove 11 screws rear cover Remove Remove the shield 10 screws.
  • Page 16 26″ LCD TV AOC L26AS73 Remove the 4 screws Remove the 4 screws Remove I/O Remove the 6 screws Remove Remove the 11 boards screws...
  • Page 17 26″ LCD TV AOC L26AS73 Remove Remove the 2 bracket screws Remove panel holder Remove the 14 screws...
  • Page 18 26″ LCD TV AOC L26AS73 Remove key, IR and Remove the 8 earphone screws boards...
  • Page 19: Repair Flow Chart

    26″ LCD TV AOC L26AS73 4. Repair Flow Chart 4.1 No Power (LED off) Check power cord and connector Re-plug power cord and connector Check F901, BD901, L903, D902 Replace F901,BD901,L903 or D902 Check load Check R976, R963,IC903 Replace R976,R963 or IC903...
  • Page 20 26″ LCD TV AOC L26AS73 4.2 No picture (LED orange) No picture Replace key/IR board Check key/IR board Check U701,U702 Replace U701,U702 Check U400 Replace U400 Replace I Check I C bus...
  • Page 21 26″ LCD TV AOC L26AS73 4.3 abnormal picture abnormal picture Re-connect signal Checck signal Checck filter circuit Replace filter capacitor and resistor Check source TV signal Check TV system Re-adjust TV system AV, S-video Comp, PC, HDMI Check U101 Replace U101...
  • Page 22 4.4 No sound Check signal Re-connect signal Check mute or not Make mute Off TV SIF Check TV system Re adjust TV system Check source Check U101 Check U400 Replace U101 Replace U400 Check U600 Replace U600 Check speaker Replace speaker 4.5 Key Board OSD is unstable or not working Is Key Pad Board connecting normally?
  • Page 23: White Balance Luminance Adjustment

    26″ LCD TV AOC L26AS73 5. White Balance, Luminance Adjustment It is no need to do white balance for this model.
  • Page 24: Pcb Layout

    26″ LCD TV AOC L26AS73 6. PCB Layout 6.1 Main Board...
  • Page 25 26″ LCD TV AOC L26AS73...
  • Page 26: Power Board

    26″ LCD TV AOC L26AS73 6.2 Power Board 715T2463 2SAN...
  • Page 27 26″ LCD TV AOC L26AS73...
  • Page 28 26″ LCD TV AOC L26AS73...
  • Page 29: Key Board

    26″ LCD TV AOC L26AS73 6.3 Key Board 715T2680 1 6.4 IR Board 715T2740 1...
  • Page 30: Block Diagram

    26″ LCD TV AOC L26AS73 7. Block Diagram Panel LVDS U401 HDMI Flash Rom U400 MX25L4005AMC PC VGA Scale YPbPr Video Decoder Audio Decoder S-Video TMDS Decoder U601 TV CVBS AMP-LOUT TU100 ATN/CBTV Audio Pre-Amplifier TV SIF Tuner AMP-ROUT TL062CD...
  • Page 31: Schematic Diagram

    26″ LCD TV AOC L26AS73 8. Schematic Diagram 8.1 Main Board 715T2678 1 2 Power Source Panel Power +12V_PWR L703 12V/2A Q700 C761 C763 C700 C702 FB701 AO4411 VPANEL_IN 470uF/16V 0.1UF/16V 470uF/16V 0.1uF NC/300 OHM VCC-Panel +12V_PWR CN700 FB703 300 OHM...
  • Page 32 26″ LCD TV AOC L26AS73 Vcc3.3 for MST9E19A Vcc1.8 for MST9E19A FB705 5Vstb +3.3VA 300 OHM U702 VOUT D700 R715 B340A 100KΩ 1/10W D702 5Vstb C714 C715 U701 NC SSM5819SPT 0.1uF C713 AIC1084-33PM 0.1uF C716 MP2106 VDDC 47UF/16V L701 +12V_PWR...
  • Page 33 26″ LCD TV AOC L26AS73 Location Near IC Pin. Location Near IC Pin. +3.3V R401 AMP-Rout 100Ω 1/10W AMP-R R725 AMP-R AUOutR2 NC 100Ω 1/10W AUOut2-R AUOut2-R D400 C402 R403 BAV99 +3.3V 0.01uF 22KΩ 1/10W C776 R726 R400 NC 22KΩ 1/10W 10KΩ...
  • Page 34 26″ LCD TV AOC L26AS73 VGA/5V P100 ZD123 NC 1000pF UDZS5.6B C173 C176 C177 NC 1000pF R170 NC 1000pF 100Ω 1/10W C164 VGA-B+ R171 10Ω 1/10W 0.047uF BIN+ BIN+ C165 VGA-G+ R172 10Ω 1/10W 0.047uF GIN+ GIN+ C166 VGA-R+ R173 10Ω...
  • Page 35 26″ LCD TV AOC L26AS73 5Vstb C508 C507 C506 C505 0.1UF16V 0.1UF16V 0.1UF16V 0.1UF16V D500 D501 D502 BAV99 BAV99 BAV99 D503 BAV99 CN500 HDMI SHELL1 HDMI-RX2+ R500 10Ω 1/10W R_TX2+ HDMI-RX2- R501 10Ω 1/10W R_TX2- D2 Shield HDMI-RX1+ R502 10Ω 1/10W...
  • Page 36 26″ LCD TV AOC L26AS73 AV audio out HD Audio-R Input S-Video +AV OUT CN106 CN105 R145 NC JACK JACK CN102 JACK 10Ω 1/10W AUDIO-LOUT HD-Lin SVIDEO-Cin SVIDEO-Cin+ AV_OUT AUDIO-ROUT HD-Rin C148 680pF SVIDEO-Cin R147 10Ω 1/10W ZD117 ZD105 SVIDEO-Y in...
  • Page 37 26″ LCD TV AOC L26AS73 Video Module (Tuner+Demodulator) Option TUNER TMIP-C22I1W U101 CABLE IN R757 NC/10KΩ 1/10W TV-MONO FB102 300 OHM C794 R758 NC/560pF NC/12KΩ 1/10W R122 C114 C115 10Ω 1/10W SDA_EXT 10uF/16V 0.1uF R123 10Ω 1/10W SCL_EXT FB103 300 OHM...
  • Page 38 26″ LCD TV AOC L26AS73 Audio Pre-Amplifier Audio Power Amplifier R635 R634 +12V_PWR 3.9Ω 3W 3.9Ω 3W +12V_PWR OPIN_VCC R631 R633 C615 47UF/16V R620 3.9Ω 3W 3.9Ω 3W 100Ω 1/10W 5Vstb R621 R622 5Vstb 33KΩ 1/10W 33KΩ 1/10W FB600 R630 3.9Ω 3W R632 3.9Ω...
  • Page 39: Power Board

    26″ LCD TV AOC L26AS73 8.2 Power Board C945 C974 C975 R919 NC R981 NC R980 R982 D902 L903 FMX-G26S D905 R976 B+_390V B+_390V 0.1 ohm +12V N/A L909 BD901 200uH L906 D10XB60 220uH C938 R950 T901 R969 C910 2200pF/2KV 100KΩ...
  • Page 40: Key Board

    26″ LCD TV AOC L26AS73 8.3 Key Board 715T2680 1...
  • Page 41: Ir Board

    26″ LCD TV AOC L26AS73 8.4 IR Board 715T2740 1...
  • Page 42: Exploded View

    26″ LCD TV AOC L26AS73 9. Exploded View...
  • Page 43: Bom List

    26″ LCD TV AOC L26AS73 10. BOM List E267M1NM2WSDNN Location Part No. Description 001T6020 5 SCREW 001T6021 1 SCREW 040T 581 26704 SHIPPING LABEL 041T 68508 A CONTROL CARD 044T3231 21 2 EVA WASHER 044T3231 21 3 EVA WASHER 044T6000 1 1A...
  • Page 44 26″ LCD TV AOC L26AS73 087T 501 7 RF GP AC SOCKET 095T 900 94 D HARNESS 100MM E09501 095T8021 3X550 WIRE HARNESS 096T 29 6 SHRINK TUBE UL/CSA 0M1T 130 6 47 CR3 SCREW Q15T0121 24 IO-BKT-BTM-FOR AOC 705TQ734464...
  • Page 45 26″ LCD TV AOC L26AS73 CN903 033T3802 12 WAFER PH-12 CN901 033T8029 3A WAFER 2P 3.96MM 051T 6 4503 GLUE_RTV IC904 056T 139 3B IC PC123Y82FZ0F IC905 056T 139 3B IC PC123Y82FZ0F IC907 056T 139 3B IC PC123Y82FZ0F C901 063T107K474 US X2 CAP 0.47UF K 275VAC...
  • Page 46 26″ LCD TV AOC L26AS73 C951 067T215L102 6N EC 1000UF 35V KY35VB1000M-L 12.5*25MM C972 067T215L102 6N EC 1000UF 35V KY35VB1000M-L 12.5*25MM C936 067T215L102 6N EC 1000UF 35V KY35VB1000M-L 12.5*25MM C927 067T215L102 6N EC 1000UF 35V KY35VB1000M-L 12.5*25MM D903 093T1100 1052T...
  • Page 47 26″ LCD TV AOC L26AS73 R972 061T0805102 RST CHIPR 1KOHM +-5% 1/4W R947 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R959 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R961 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R975 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W...
  • Page 48 26″ LCD TV AOC L26AS73 C920 065T0805102 32 CHIP 1000PF 50V X7R 0805 C948 065T0805103 32 10NF/50V/0805/X7R C917 065T0805103 32 10NF/50V/0805/X7R C926 065T0805104 32 CHIP 0.1UF 50V X7R C908 065T0805104 32 CHIP 0.1UF 50V X7R C944 065T0805105 37 CHIP 1UF 50V Y5V...
  • Page 49 26″ LCD TV AOC L26AS73 C909 067T215P4707PT CAP 105C 47UF M 50V F901 084T 55 4 FUSE 382-5A 250V WICKMANN D916 093T1020 752T UF4003PT D913 093T1020 752T UF4003PT D909 093T1100 1052T BA159GPT J901 095T 90 23 JUMP WIRE J922 095T 90 23...
  • Page 50 26″ LCD TV AOC L26AS73 CN102 088T 78 137CL AV-S-01-Y P101 088T 30214K PHONE JACK P100 088T 35315F H DB15 RIGHT ANGLE FEMALE X400 093T 22 53 CRYSTAL 14.318MHZHC-49US U101 094TNPALALL 6C TUNER CHANGHONG TMI9-C22I1W C789 067T 305100 3T 10UF 16V...
  • Page 51 26″ LCD TV AOC L26AS73 Q707 057T 417 4 CHIP PMBS3904 BY PHILIPS Q705 057T 417 4 CHIP PMBS3904 BY PHILIPS Q601 057T 417 4 CHIP PMBS3904 BY PHILIPS Q605 057T 417 4 CHIP PMBS3904 BY PHILIPS Q701 057T 417 4...
  • Page 52 26″ LCD TV AOC L26AS73 R435 061T0603101 RST CHIPR 100 OHM +-5% 1/10W R451 061T0603101 RST CHIPR 100 OHM +-5% 1/10W R457 061T0603101 RST CHIPR 100 OHM +-5% 1/10W R512 061T0603101 RST CHIPR 100 OHM +-5% 1/10W R513 061T0603101 RST CHIPR 100 OHM +-5% 1/10W...
  • Page 53 26″ LCD TV AOC L26AS73 R139 061T0603103 RST CHIPR 10KOHM +-5% 1/10W R140 061T0603103 RST CHIPR 10KOHM +-5% 1/10W R163 061T0603103 RST CHIPR 10KOHM +-5% 1/10W R165 061T0603103 RST CHIPR 10KOHM +-5% 1/10W R184 061T0603103 RST CHIPR 10KOHM +-5% 1/10W...
  • Page 54 26″ LCD TV AOC L26AS73 R152 061T0603470 RST CHIPR 47 OHM +-5% 1/10W R153 061T0603470 RST CHIPR 47 OHM +-5% 1/10W R154 061T0603470 RST CHIPR 47 OHM +-5% 1/10W R159 061T0603470 RST CHIPR 47 OHM +-5% 1/10W R161 061T0603470 RST CHIPR 47 OHM +-5% 1/10W...
  • Page 55 26″ LCD TV AOC L26AS73 C777 065T0402103 32 MLCC 0402 10NF K 50V X7R C776 065T0402103 32 MLCC 0402 10NF K 50V X7R C759 065T0402103 32 MLCC 0402 10NF K 50V X7R C758 065T0402103 32 MLCC 0402 10NF K 50V X7R...
  • Page 56 26″ LCD TV AOC L26AS73 C733 065T040210427T CAP 0402 0.1UF Z 25V Y5V TAIYO YUDEN C734 065T040210427T CAP 0402 0.1UF Z 25V Y5V TAIYO YUDEN C735 065T040210427T CAP 0402 0.1UF Z 25V Y5V TAIYO YUDEN C736 065T040210427T CAP 0402 0.1UF Z 25V Y5V TAIYO YUDEN...
  • Page 57 26″ LCD TV AOC L26AS73 C748 065T0603225 17 CHIP 2.2UF 16V Y5V C756 065T0603225 17 CHIP 2.2UF 16V Y5V C785 065T0603225 17 CHIP 2.2UF 16V Y5V C788 065T0603225 17 CHIP 2.2UF 16V Y5V C792 065T0603225 17 CHIP 2.2UF 16V Y5V...
  • Page 58 26″ LCD TV AOC L26AS73 ZD109 093T 64 37 N V-PORT-0603-100K V05 ZD108 093T 64 37 N V-PORT-0603-100K V05 ZD107 093T 64 37 N V-PORT-0603-100K V05 ZD106 093T 64 37 N V-PORT-0603-100K V05 ZD105 093T 64 37 N V-PORT-0603-100K V05...
  • Page 59 26″ LCD TV AOC L26AS73 Q15T0123 10 PCB-BKT-FOR CHANGHONG Q15T0139 1 PANEL-HOLDER-L Q15T0140 1 PANEL-HOLDER-R Q15T0143 1 PANEL-SIDE-HOLD Q33T0128 GM 1L SIDE COVER Q36T 600 30 7 HEMIRON Q36T 600 30 16 NONWOVEN FABRIC Q36T 600 37 1 NONWOVEN FABRIC...

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