AOC L42W665 Service Manual
AOC L42W665 Service Manual

AOC L42W665 Service Manual

42″ lcd tv
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42" LCD TV
Service
Service
Service
Description
Table Of Contents......................................................1
Important Safety Notice...................................................2
Revision List........................................................3
1. General Specification...............................................4
2. Operating Instructions.........................................5
2.1. The Use Of Remote Control.................................5
2.2. To Use The Menus............................................6
2.3. How To Connect..............................................13
2.4. Front Panel Control Knobs.................................15
3. Input/Output Specification.......................................16
4. Mechanical Instructions.........................................18
5. Repair Flow Chart ..............................................23
6. PCB Layout ....................................................28
6.1.Main Board....................................................28
6.2.Power Board..............................................30
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
6.3.IR Board.......................................................33
6.4.Connector Board..........................................34
6.5.Key Board.....................................................34
8 Block Diagram..................................................37
9. Schematic.....................................................38
9.1 Main Board................................................38
9.2. Power Board.............................................54
9.3. IR Board....................................................55
9.4. Key Board.............................................56
9.5. Side Board.................................................57
9.6. Audio Board................................................58
10. Exploded View...........................................59
11. BOM List.....................................................60
12.Different Part List........................................... 88
SAFETY NOTICE
1
AOC L42W665
Horizontal Frequency
31~60kHz
Page

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Summary of Contents for AOC L42W665

  • Page 1: Table Of Contents

    42″ LCD TV AOC L42W665 Service Service Service Horizontal Frequency 31~60kHz TABLE OF CONTENTS Description Page Description Page 6.3.IR Board…………………………………………..33 Table Of Contents..……......…..1 6.4.Connector Board……………………..………..34 Important Safety Notice........……..2 6.5.Key Board……………………………….………..34 Revision List.…........……..3 7. White-Balance, Luminance Adjustment....35 1. General Specification......………..4 8 Block Diagram.……...........37 2.
  • Page 2: Important Safety Notice

    AOC L42W665 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: Revision List

    42″ LCD TV AOC L42W665 Revision List Version Release Date Revision Instructions TPV Model July-10-07 Initial Release E427AZNS2WA2NN E427AZNS2WA2NN/ Aug-15-07 Add New BOM E427AZNK2WA5NN...
  • Page 4: General Specification

    42″ LCD TV AOC L42W665 1. General Specification Items Specification Panel Type T420XW01 V500 TW AUO Driving system TFT-LCD AUO Panel Aspect Ratio 16: 9 Resolutions 1366 x768 Active Area 930.25 (H) x 523.01(V) Pixel Pitch 0.681 mm (H) X 0.681 mm(V)
  • Page 5: Operating Instructions

    42″ LCD TV AOC L42W665 2. Operating Instructions 2.1. The Use of Remote Control...
  • Page 6: To Use The Menus

    42″ LCD TV AOC L42W665 2.2 To Use the Menus 1. Press the MENU button to display the main menu 2. Use the cursor up/down to select a menu item. 3. Use the cursor left/right to enter a submenu. 4. Press the OK button to enable/disable the function.
  • Page 7 42″ LCD TV AOC L42W665 VIDEO MENU The Video menu in most source modes shows as below. It provides several video adjustment items for user fine tuning the video display. Only in VGA source modes, the Video menu simply provides Contrast, Brightness, Back light and Settings (Preset) items.
  • Page 8 42″ LCD TV AOC L42W665 7. TV Speaker: Choose to turn on / off the TV internal speaker. The digital audio output signals、earphone output signals and the composite L/R audio output signals will not be turn-off even though the TV speaker is off. The default setting is On.
  • Page 9 42″ LCD TV AOC L42W665 4. Password Set: Change the 4-numeral parental control password. Three steps are required for changing the password: Enter Old Password -> Enter New Password -> Confirm New Password. Note: This item is only available in TV, Composite and S-Video source modes. The default password is 『0 0 0 0』.
  • Page 10 42″ LCD TV AOC L42W665 6. Digital Captions: Select the close caption options ( Service 1-6, Text 1-4 and CC 1-4) in digital TV mode. When select service 1 to service 6 you can modulate parameters in the Digital Close Caption.
  • Page 11 42″ LCD TV AOC L42W665 【Edge Effect】: The text edge effects, which gives None / Raised / Depressed / Uniform / Left Shadow / Right Shadow modes. 【Edge Color】: The colors of text edge effects, which provides Red / Green / Blue / Yellow / Magenta / Cyan / Black / White Colors.
  • Page 12 42″ LCD TV AOC L42W665 2.Increase the separation between the equipment and the TV. 3.Connect the equipment into wall power outlet on a circuit different from that to which the receiver is connected. 4.Consult the dealer or an experienced radio or television technician for help.
  • Page 13: How To Connect

    42″ LCD TV AOC L42W665 2.3 How to Connect There are several ways to connect your TV. Please use the following chart to determine which connection is best for you. Once your equipment is connected, use the following procedure to view the input signal: Press the source button on the remote controller to select the relevant source to view.
  • Page 14 42″ LCD TV AOC L42W665 Note: The MUTE key on the remote control works on both TV internal speaker and the earphone output.
  • Page 15: Front Panel Control Knobs

    42’’ LCD TV AOC L42W665 2.4 Front Panel Control Knobs...
  • Page 16: Input/Output Specification

    42’’ LCD TV AOC L42W665 3. Input/Output Specification 3.1 RGB Signal input 15 - Pin Color Display Signal Cable Pin No. Description Pin No. Description Red Video Mandatory +5V Supply for PC Bypass Green Video Sync Ground Blue Video SDA(Remote Control)
  • Page 17 42’’ LCD TV AOC L42W665 3.3 Compatible Mode Table VESA MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Total Frequency Freq. Polarit Polarity Clock (KHz) (Hz) (MHz) 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861...
  • Page 18: Mechanical Instructions

    42″ LCD TV AOC L42W665 4. Mechanical Instructions 1. Remove the base first with six screws in the base. 2. Remove the screws in red to remove the rear cover.
  • Page 19 42″ LCD TV AOC L42W665 3. Remove the speaker cover and the cover-shield. 4. Remove the screws in red to remove the two metallic bracket and button assemble.
  • Page 20 42″ LCD TV AOC L42W665 5. Remove the screws and pull out the connecters to remove the board.
  • Page 21 42″ LCD TV AOC L42W665 6. Remove the screws and connectors in red to remove the bezel and speakers.
  • Page 22 42″ LCD TV AOC L42W665 7. Remove the screws to remove the left and right metallic bracket.
  • Page 23: Repair Flow Chart

    42″ LCD TV AOC L42W665 5. Repair Flow Chart 1. No Power (No LED indicator) NO POWER Plug in power cord and interface Check power cord Replace F901 or BD901 or D902 Check F901, BD901, D902 Replace IC931, IC971, or Q931 or Q932 (VCC) Check IC931, IC971,Q931 ,Q932...
  • Page 24 42″ LCD TV AOC L42W665 2. Can not start (LED indicator yellow) Check key board Repair the key board Check the standby voltage of main board Replace U903,U906,U907,U908,U909,U911 Check U401 Replace U401 Replace U404 Check U404 Check the components of I...
  • Page 25 42’’ LCD TV AOC L42W665 3. Abnormal display Check the source Reset source Replace the filter or inductance Check signal filter circuit TV signal Check TV system setup Replace TU701 Check TU701 Check U701 Replace U701 Check U108 NTSC, AV,...
  • Page 26 42’’ LCD TV AOC L42W665 4. No sound Reset source Check the source Replace the filter or inductance Check signal filter circuit Replace the Earphone jack Check Earphone jack SIF signal Check TV system setup Replace TU701 Check TU701 Replace U701...
  • Page 27 42’’ LCD TV AOC L42W665 5. Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Is Button Switch normally? Replace Button Switch Replace Key Pad Board Is Key Pad Board Normally?
  • Page 28: Pcb Layout

    42’’ LCD TV AOC L42W665 6. PCB Layout 6.1 Main Board...
  • Page 29 42’’ LCD TV AOC L42W665...
  • Page 30: Power Board

    42’’ LCD TV AOC L42W665 6.2 Power Board...
  • Page 31 42’’ LCD TV AOC L42W665...
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  • Page 33: Ir Board

    42’’ LCD TV AOC L42W665 6.3 IR Board...
  • Page 34: Connector Board

    42’’ LCD TV AOC L42W665 6.4 Side Board 6.5 Key Board...
  • Page 35: White-Balance, Luminance Adjustment

    42’’ LCD TV AOC L42W665 7. White Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Please select channel 03 to adjust the white balance. Color Temp. Cold Normal Warm PC MODE...
  • Page 36 42’’ LCD TV AOC L42W665 B. Adjust Normal color-temperature: 1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>450 cd/m ± 30 cd/m 2. Switch the chroma-7120 to RGB-mode (with press “MODE” button) 3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120) 4.
  • Page 37: Block Diagram

    42’’ LCD TV AOC L42W665 8. Block Diagram...
  • Page 38: Schematic

    42’’ LCD TV AOC L42W665 9. Schematic Diagram 9.1 Main Board...
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  • Page 54: Power Board

    42’’ LCD TV AOC L42W665 9.2 Power Board C943 C944 C945 R947 R948 3300PF/50V 3300PF/50V 3300PF/50V   1/4W   1/4W R949 R950 D902   1/4W   1/4W L906 FMX-G26S T931 D950 R931 BD901 POWER X'FMR FME-210B L931 0.1 ohm +12V...
  • Page 55: Ir Board

    42’’ LCD TV AOC L42W665 9.3 IR Board...
  • Page 56: Key Board

    42’’ LCD TV AOC L42W665 9.4 Key Board...
  • Page 57: Side Board

    42’’ LCD TV AOC L42W665 9.5 Side Board...
  • Page 58: Audio Board

    42’’ LCD TV AOC L42W665 9.6 Audio Board...
  • Page 59: Exploded View

    42’’ LCD TV AOC L42W665 10. Exploded View...
  • Page 60: Bom List

    HARNESS 12P+ 4P+ 9P-12P 340MM 095T801414D 88 HARNESS 14P-10P+4P 950MM 095T801414D 89 HARNESS 14P-14P 380MM 095T801830D156 HARNESS 30P-28P 250MM 098TR7BDINEACF REMOTE FUHUA FOR AOC 0M1T 930 4120 SCREW 0M1T 940 6120 SCREW 0M1T 940 8 47 CR3 SCREW 0M1T1140 6120...
  • Page 61 42″ LCD TV AOC L42W665 C101 065T0603101 31 CHIP 100PF 50V NPO C102 065T0603101 31 CHIP 100PF 50V NPO C107 065T0603101 31 CHIP 100PF 50V NPO C105 065T0603101 31 CHIP 100PF 50V NPO C106 065T0603101 31 CHIP 100PF 50V NPO...
  • Page 62 42″ LCD TV AOC L42W665 LED1 081T 14501 KT 715T2534 1 IR BOARD PCB KEPF6AA6 KEY BOARD CN21 033T8027 8 H WAFER SW25 077T 600 1GCJ TACT SWITCH TSPB-2 -NP SW26 077T 600 1GCJ TACT SWITCH TSPB-2 -NP SW27 077T 600 1GCJ...
  • Page 63 42″ LCD TV AOC L42W665 C901 063T107K474 US X2 CAP 0.47UF K 275VAC C980 063T210J2735C2 MPP 27NF J 1000V C907 063T213J105GFA MPF CAP C939 065T 2K222 1A6921 CAP CER 2200PF K 2KV C908 065T306K4712BP 470PF +-10% 250VAC C909 065T306K4712BP 470PF +-10% 250VAC...
  • Page 64 42″ LCD TV AOC L42W665 D976 093T 60247 DIODE FME-220A TO-220 SANKEN D975 093T 60247 DIODE FME-220A TO-220 SANKEN 0M1T1730 10120 SCREW Q90T0096A01 HEAT SINK 705TQE93003 BD901 ASS'Y BD901 093T 50460 18 D10XB60 0M1T1730 10120 SCREW Q90T0132 1 HEAT SINK...
  • Page 65 42″ LCD TV AOC L42W665 R959 061T0805360 1F RST CHIPR 3.6 KOHM +-1% 1/8W R922 061T0805393 RST CHIPR 39 KOHM +-5% 1/8W R946 061T0805471 RST CHIPR 470 OHM +-5% 1/8W R9019 061T0805513 RST CHIPR 51 KOHM +-5% 1/8W R923 061T0805513...
  • Page 66 42″ LCD TV AOC L42W665 C911 065T0805104 32 CHIP 0.1UF 50V X7R C931 065T0805104 32 CHIP 0.1UF 50V X7R C935 065T0805104 32 CHIP 0.1UF 50V X7R C921 065T0805104 32 CHIP 0.1UF 50V X7R C941 065T0805104 32 CHIP 0.1UF 50V X7R...
  • Page 67 42″ LCD TV AOC L42W665 R974 061T 60220552T RST CFR 2MOHM +-5% 1/6W R911 061T 60222952T 2.2 OHM +-5% 1/6W R910 061T 60247052T CFR 47OHM +-5% 1/6W R926 061T214Y10552T RST MGFR 1 MOHM +-5% 1/4W C998 067T215Y1007KT EC105 10U 50V KEM50V...
  • Page 68 42″ LCD TV AOC L42W665 067T 215101 6P EC 105℃ 100UF M 35V 067T 215221 6P ELCAP 105℃ 220UF M 35V 067T 215221 6P ELCAP 105℃ 220UF M 35V 073T 253158 H CHOKE COIL 22UH+/-25% 073T 253158 H CHOKE COIL 22UH+/-25%...
  • Page 69 42″ LCD TV AOC L42W665 065T0603224 32 MLCC 0603 0.22UF K 50V X7R 065T0603224 32 MLCC 0603 0.22UF K 50V X7R 065T0603224 32 MLCC 0603 0.22UF K 50V X7R 065T0603224 32 MLCC 0603 0.22UF K 50V X7R 065T0603333 32 CHIP 0.033UF 50V X7R 065T0603334 27 MLCC 0603 CAP 0.33UF Z 25V Y5V...
  • Page 70 42″ LCD TV AOC L42W665 CN102 088T 35315F H DB15 RIGHT ANGLE FEMALE U401 090T 372 2 HEAT SINK U701 090T8007 1A HEAT SINK X901 093T 2204S JZ CRYSTAL 4MHZ/30PF/49U/S JING ZHAN X401 093T 2258B J 24.576MHZ/20PF/49US X701 093T 2262B J CRYSTAL NXS25.000 AC 20PF HC-49/US NSK...
  • Page 71 42″ LCD TV AOC L42W665 Q910 057T 758 1 FET 2N7002E VISHAY Q912 057T 763 3 AO4411L SO-8 BY AOS SMT Q911 057T 763 3 AO4411L SO-8 BY AOS SMT Q908 057T 763 3 AO4411L SO-8 BY AOS SMT Q111...
  • Page 72 42″ LCD TV AOC L42W665 R4G7 061T0603000 CHIP 0OHM 1/16W R724 061T0603000 CHIP 0OHM 1/16W R611 061T0603000 CHIP 0OHM 1/16W R610 061T0603000 CHIP 0OHM 1/16W R4T3 061T0603000 CHIP 0OHM 1/16W R4T2 061T0603000 CHIP 0OHM 1/16W R4T1 061T0603000 CHIP 0OHM 1/16W...
  • Page 73 42″ LCD TV AOC L42W665 R462 061T0603102 CHIP 1K OHM 1/16W R441 061T0603102 CHIP 1K OHM 1/16W R439 061T0603102 CHIP 1K OHM 1/16W R437 061T0603102 CHIP 1K OHM 1/16W R435 061T0603102 CHIP 1K OHM 1/16W R427 061T0603102 CHIP 1K OHM 1/16W...
  • Page 74 42″ LCD TV AOC L42W665 R4L8 061T0603103 CHIP 10KOHM 1/16W R4N1 061T0603103 CHIP 10KOHM 1/16W R178 061T0603103 CHIP 10KOHM 1/16W R177 061T0603103 CHIP 10KOHM 1/16W R176 061T0603103 CHIP 10KOHM 1/16W R107 061T0603103 CHIP 10KOHM 1/16W R106 061T0603103 CHIP 10KOHM 1/16W...
  • Page 75 42″ LCD TV AOC L42W665 R190 061T0603223 CHIP 22KOHM 1/16W R189 061T0603223 CHIP 22KOHM 1/16W R188 061T0603223 CHIP 22KOHM 1/16W R187 061T0603223 CHIP 22KOHM 1/16W R186 061T0603223 CHIP 22KOHM 1/16W R185 061T0603223 CHIP 22KOHM 1/16W R195 061T0603223 CHIP 22KOHM 1/16W...
  • Page 76 42″ LCD TV AOC L42W665 R982 061T0603392 CHIP 3.9KOHM 1/16W R986 061T0603392 CHIP 3.9KOHM 1/16W R104 061T0603393 RST CHIPR 39 KOHM +-5% 1/10W R108 061T0603393 RST CHIPR 39 KOHM +-5% 1/10W R979 061T0603464 1F RST CHIP 4K64 1/10W 1% R712...
  • Page 77 42″ LCD TV AOC L42W665 R1A4 061T0603473 CHIP 47KOHM 1/16W R1A3 061T0603473 CHIP 47KOHM 1/16W R1A2 061T0603473 CHIP 47KOHM 1/16W R1A1 061T0603473 CHIP 47KOHM 1/16W R1A0 061T0603473 CHIP 47KOHM 1/16W R199 061T0603473 CHIP 47KOHM 1/16W R1B1 061T0603473 CHIP 47KOHM 1/16W...
  • Page 78 42″ LCD TV AOC L42W665 R1E1 061T0603750 9F CHIP 75OHM 1/16W 1% R1E2 061T0603750 9F CHIP 75OHM 1/16W 1% R1E3 061T0603750 9F CHIP 75OHM 1/16W 1% R1E4 061T0603750 9F CHIP 75OHM 1/16W 1% R4A2 061T0603820 0F RST CHIPR 820 OHM +-1% 1/10W...
  • Page 79 42″ LCD TV AOC L42W665 C974 065T0603103 32 CHIP 0.01UF 50V X7R C973 065T0603103 32 CHIP 0.01UF 50V X7R C972 065T0603103 32 CHIP 0.01UF 50V X7R C971 065T0603103 32 CHIP 0.01UF 50V X7R C970 065T0603103 32 CHIP 0.01UF 50V X7R...
  • Page 80 42″ LCD TV AOC L42W665 C4F5 065T0603104 32 CHIP 0.1UF 50V X7R C4H1 065T0603104 32 CHIP 0.1UF 50V X7R C4H3 065T0603104 32 CHIP 0.1UF 50V X7R C4H4 065T0603104 32 CHIP 0.1UF 50V X7R C4H5 065T0603104 32 CHIP 0.1UF 50V X7R...
  • Page 81 42″ LCD TV AOC L42W665 C4D7 065T0603104 32 CHIP 0.1UF 50V X7R C406 065T0603104 32 CHIP 0.1UF 50V X7R C407 065T0603104 32 CHIP 0.1UF 50V X7R C408 065T0603104 32 CHIP 0.1UF 50V X7R C409 065T0603104 32 CHIP 0.1UF 50V X7R...
  • Page 82 42″ LCD TV AOC L42W665 C436 065T0603104 32 CHIP 0.1UF 50V X7R C437 065T0603104 32 CHIP 0.1UF 50V X7R C454 065T0603104 32 CHIP 0.1UF 50V X7R C453 065T0603104 32 CHIP 0.1UF 50V X7R C452 065T0603104 32 CHIP 0.1UF 50V X7R...
  • Page 83 42″ LCD TV AOC L42W665 C999 065T0603509 31 CHIP 5PF 50V NPO C702 065T0603560 31 CHIP 56PF 50V NPO C726 065T0603561 31 CHIP 560PF 50V NPO C748 065T0603561 31 CHIP 560PF 50V NPO C746 065T0603561 31 CHIP 560PF 50V NPO...
  • Page 84 42″ LCD TV AOC L42W665 C184 067T311F100 3T 105℃ 10UF +-20% 16V SMD C183 067T311F100 3T 105℃ 10UF +-20% 16V SMD C182 067T311F100 3T 105℃ 10UF +-20% 16V SMD C181 067T311F100 3T 105℃ 10UF +-20% 16V SMD C180 067T311F100 3T 105℃...
  • Page 85 42″ LCD TV AOC L42W665 C914 067T411F4703XT EC 105℃ SMD CAP 47UF M 16V C933 067T411F4703XT EC 105℃ SMD CAP 47UF M 16V C934 067T411F4703XT EC 105℃ SMD CAP 47UF M 16V C935 067T411F4703XT EC 105℃ SMD CAP 47UF M 16V...
  • Page 86 42″ LCD TV AOC L42W665 FB406 071T 58B151 K CHIP BEAD 150 OHMFBMA-11-32251 FB405 071T 58B151 K CHIP BEAD 150 OHMFBMA-11-32251 FB404 071T 58B151 K CHIP BEAD 150 OHMFBMA-11-32251 FB403 071T 58B151 K CHIP BEAD 150 OHMFBMA-11-32251 FB113 071T 59B121...
  • Page 87 42″ LCD TV AOC L42W665 ZD402 093T 64 37 N V-PORT-0603-100K V05 ZD401 093T 64 37 N V-PORT-0603-100K V05 ZD117 093T 64 37 N V-PORT-0603-100K V05 ZD115 093T 64 37 N V-PORT-0603-100K V05 ZD114 093T 64 37 N V-PORT-0603-100K V05...
  • Page 88: Different Part List

    42″ LCD TV AOC L42W665 12. Different Part List Diversity of E427AZNS2WA2NN compared with E427AZNS2WA2NN Location TPV Part No. Description 001T6021 1 SCREW 050T 600 1 W WIHITE STRAP 052T 1150 C BLACK TAPE 078T 451 5 G SPEAKER 8 OHM 15W 150X57.5MM...
  • Page 89 42″ LCD TV AOC L42W665 ZD148 093T 39147 TZMC 5V6 ZD147 093T 39147 TZMC 5V6 ZD146 093T 39147 TZMC 5V6 ZD145 093T 39147 TZMC 5V6 ZD144 093T 39147 TZMC 5V6 ZD143 093T 39147 TZMC 5V6 ZD142 093T 39147 TZMC 5V6...

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