AOC L37W551B Service Manual
AOC L37W551B Service Manual

AOC L37W551B Service Manual

37” lcd tv

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37" LCD TV
Service
Service
Service
Description
Table Of Contents......................................................1
Revision List........................................................2
Important Safety Notice.....................................3
1.General Specifications...............................................4
2.Operating Instructions..........................................5
2.1.The Use of Remote Control....................................5
2.2.To Use the Menu.....................................................7
2.3.LCD TV Description.............................................15
2.4.Interface Connector................................................15
4.Input/Output Description....................... ...........21
4.1.D-SUB Connector............................................21
4.2.Factory Preset Display Modes...........................22
5.Front Panel Control Knobs.......................................22
6.Repair Flow Chart...................................................23
7.Mechanical Instructions...............................28
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 VOLTAGE
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
8.PCB Layout.....................................................34
8.1.Main Board.....................................................34
8.2.Power Board..................................................37
8.3.Audio Board..................................................40
8.4.IO Board........................................................41
8.5.IR Board.........................................................44
8.6.Key Board........................................................45
9.Block Diagram................................................46
10.Schematic Diagram....................................47
10.1.Main Board..............................................47
10.2.Power Board.................................................59
10.3.Audio Board.................................................60
10.4.IO Board........................................................61
11.Exploded View.....................................................64
12.BOM List........................................................66
SAFETY NOTICE
1
AOC L37W551B
Page

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Summary of Contents for AOC L37W551B

  • Page 1: Table Of Contents

    37” LCD TV AOC L37W551B Service Service Service TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 8.PCB Layout..…………........34 Revision List.…........……..2 8.1.Main Board………..…….........34 Important Safety Notice.……....……..3 8.2.Power Board…...………........37 1.General Specifications......………..4 8.3.Audio Board…...………........40 2.Operating Instructions………..……………………..5 8.4.IO Board…………..........41 2.1.The Use of Remote Control…....……...5 8.5.IR Board………………........44...
  • Page 2: Revision List

    37” LCD TV AOC L37W551B Revision List Revision Date Revision History TPV Model Mar-29-07 First Version Release E376ATNBW1A6N...
  • Page 3: Important Safety Notice

    AOC L37W551B 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 4: General Specifications

    37” LCD TV AOC L37W551B 1. General Specifications Item Specification Screen Size 37” TFT-LCD Panel Aspect Ratio 16 :9 Resolution 1366 x768 Display Area (opening) H x V 819.6mm x 460.8mm LCD Panel Pixel Pitch 0.6mm x 0.6mm Display Colors 16.7 million...
  • Page 5: Operating Instructions

    37” LCD TV AOC L37W551B 2. Operating Instructions 2.1. The Use Of Remote Control...
  • Page 6 37” LCD TV AOC L37W551B TELETEXT...
  • Page 7: To Use The Menu

    37” LCD TV AOC L37W551B 2.2 To Use The Menus...
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  • Page 15: Lcd Tv Description

    37” LCD TV AOC L37W551B 2.3 LCD TV Description The LCD TV will contain a main board, a power board, an IR board, a key board, an IO board and an audio Board. The main board and power board will house the flat panel to control logic I C bus, DDC, brightness control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD Module to drive the LCD display circuit.
  • Page 16: White Balance Luminance Adjustment

    37” LCD TV AOC L37W551B 6. White Balance, Luminance Adjustment Instrument List: Chroma 2225 VG848 Chroma 7120 Adjustment Process: Instrument Orientation Connect LCD-TV Chroma 2225 and VG848, and set Timing137 Pattern1 on Chroma2225. Chroma7120’s lens must aim at the center of Pattern1 showed on the LCD-TV’s screen. The distance of Chroma7120’s lens and the center of screen is 20cm 1cm.
  • Page 17 37” LCD TV AOC L37W551B Fig.2 Fig.3 PC Mode White Balance Adjustment Begin to adjust the W/B (White Balance) you should select the Color Temp and enter the son menu from father menu “Scaler” refer to Fig.2 and Fig.3. Set channel color temperature value and brightness on Chroma7120.Set 303 319 350(7200K) on CH1 and 278 289 350(10300K) on CH1.Press MODE key on Chroma7120 to switch xyY mode.
  • Page 18 37” LCD TV AOC L37W551B adjust RG GG BG value to make the value displaying on Chroma7120 is about 100.Press “Save” to save. Switch to CH1, select 10300K Temp and then adjust it according to above method. Press “Save” to save.
  • Page 19 37” LCD TV AOC L37W551B Fig.6 Fig.7 1.OFFSET(26%) W/B ADJUSTMENT(This is only for AV/TV) Change the input signal to 26% white level performance .Set the CHROMA7120 to 288 301 30 and MODE_RGB ,then adjust the TV’s RB GB BB to make CHROMA7120 display to 100.
  • Page 20 37” LCD TV AOC L37W551B SPEC. 4.CHECK CUT OFF: Change the input signal to 0% white level performance. Firstly, press the “brightness” from 50% to 0% and make sure the Y is not changed. Secondly, change the input signal to 32 GRAYS performance and make sure the grays is not connected at any position.( as the 5% level is between the first gray and the second gray.
  • Page 21: Input/Output Description

    37” LCD TV AOC L37W551B 4. Input/Output Description 4.1 D-SUB Connector This procedure gives you instructions for installing and using the LCD TV display. Position the display on the desired operation and plug the power cord into a convenient AC outlet.
  • Page 22: Factory Preset Display Modes

    37” LCD TV AOC L37W551B 4.2 Factory Preset Display Modes: Analog RGB Signal Timing Vertical Horizontal Sync Polarity Presence Screen Mode Dots Lines Frequency Frequency Normal FULL Horizontal Vertical Horizontal Vertical (Hz) (KHz) (4:3) (16:9) 720 400 70.08 31.47 60.00 31.50...
  • Page 26 37” LCD TV AOC L37W551B 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 Tuner Check Tuner AV, AIR1/AIR2, PC signal...
  • Page 27 37” LCD TV AOC L37W551B 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: Mechanical Instructions

    37” LCD TV AOC L37W551B 7. Mechanical Instructions Step Figure Description Lay the LCD-TV on a Preparation flat, soft and clean surface. Remove the Remove screws marked the rear in red to remove the cover rear cover. Remove the four screws...
  • Page 29 37” LCD TV AOC L37W551B Remove the eighteen Remove screws marked the shield. to remove the shield.
  • Page 30 37” LCD TV AOC L37W551B Remove the two screws to Remove remove the the keypad. keypad. Remove the four screws to Remove remove the speakers speakers. Remove the Remove AV four screws to iron. remove AV iron...
  • Page 31 37” LCD TV AOC L37W551B 1.Remove the screws marked Remove in red . the main board, the 2.Disconnect IO board the connector and remove and the the IO board , power the power board board and the main board.
  • Page 32 37” LCD TV AOC L37W551B Remove the Remove screws marked the main in red to remove the frame main frame. 1.Remove the Remove screws marked the front in red to remove the panel front panel.
  • Page 33 37” LCD TV AOC L37W551B The end...
  • Page 34: Pcb Layout

    37” LCD TV AOC L37W551B 8. PCB Layout 8.1 Main Board 715T1616-B-2...
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  • Page 37: Power Board

    37” LCD TV AOC L37W551B 8.2 Power Board 715T1852-3...
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  • Page 40: Audio Board

    37” LCD TV AOC L37W551B 8.3 Audio Board 715T1635-3...
  • Page 41: Io Board

    37” LCD TV AOC L37W551B 8.4 IO Board 715T1542-1...
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  • Page 44: Ir Board

    37” LCD TV AOC L37W551B 8.5 IR Board 715T1836-1-3...
  • Page 45: Key Board

    37” LCD TV AOC L37W551B 8.6 Key Board 715T1886-1...
  • Page 56 R715 1/10W R716 1/10W R717 1/10W...
  • Page 65 37” LCD TV AOC L37W551B...
  • Page 66: Power Board

    37” LCD TV AOC L37W551B 12. BOM List E376ATNBW1A6N Location Part No. For TPV Description 034T1856 GM 1L REAR BOTTOM COVER 040T 58162435A LABEL 041T780061563A WARRANTY CARD 045T 76 28 RN PE BAG FOR MANUAL 052T 1186 SMALL TAPE 052T...
  • Page 67 37” LCD TV AOC L37W551B Q15T8339 1 BKT_AU066_BOTTOM Q26T 800504 2 BARCODE Q40T 37V615 4B RATING LABEL Q40T000261530A I/O LABEL Q40T000261551A POP LABEL Q41T3701615 4A MANUAL Q41T7800615A51 Q41T7800615B10 TELEPHONE NUMBER Q44T3121510520 PU FOAM Q44T3121510522 SPONGE Q44T3121510523 SPONGE Q44T3121510525 SPONGE Q44T3B01 1...
  • Page 68 37” LCD TV AOC L37W551B 0D1T 940 10 47 CR3 SCREW 0Q1T 140 10120 SCREW Q15T8340 1 STAND-BKT Q15T8341 1 BASE-BKT Q34T1858 RG 1L 33 BASE CN922 033T3802 10 PLUG CN923 033T3802 12 WAFER PH-12 CN921 033T3802 14 CONN CN901 033T8029 3A WAFER 2P 3.96MM...
  • Page 69 37” LCD TV AOC L37W551B 705T3724061470 47OHM/1W ASS'Y 705T3724093001 37" LCD TV POWER ASS'Y 705T3724093002 37" LCD TV POWER ASS'Y 705T3724093003 ASS'Y 705TQLK0C65001 A4 FOR ADAPTER ASS'Y CN11 033T3278 12 12P PLUG B12B-XHA/JS B12B-XHA/ CN60 033T3802 2H WAFER 2P RIGHT ANGLE...
  • Page 70 37” LCD TV AOC L37W551B 088T 30231T CJ PHONE JACK 033T3802 4 WAFER PH-4 056T 627 7 FM-6038TM2-5AN 081T 12 6 GP 077T 600 1GCJ TACT SWITCH TSPB-2 -NP 077T 600 1GCJ TACT SWITCH TSPB-2 -NP 077T 600 1GCJ TACT SWITCH TSPB-2 -NP...
  • Page 71 37” LCD TV AOC L37W551B C902 065T306K6812F2 Y1 680PF K 250VAC C905 065T306K6812F2 Y1 680PF K 250VAC C901 065T306M1022F2 Y1 1000PF M 250VAC C903 065T306M1022F2 Y1 1000PF M 250VAC C904 065T306M1022F2 Y1 1000PF M 250VAC C969 065T306M4722F2 Y1 4700PF M 250VAC...
  • Page 72 37” LCD TV AOC L37W551B R995 061T0805102 RST CHIPR 1KOHM +-5% 1/4W R998 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R977 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R944 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W R927 061T0805103 RST CHIPR 10 KOHM +-5% 1/8W...
  • Page 73 37” LCD TV AOC L37W551B C940 065T0805103 32 10NF/50V/0805/X7R C915 065T0805103 32 10NF/50V/0805/X7R C973 065T0805104 32 CHIP 0.1UF 50V X7R C968 065T0805104 32 CHIP 0.1UF 50V X7R C966 065T0805104 32 CHIP 0.1UF 50V X7R C965 065T0805104 32 CHIP 0.1UF 50V X7R...
  • Page 74 37” LCD TV AOC L37W551B U705 056T 585 4A AP1117E33LA 056T 614 1 IC 74HC4052D PHILIPS 056T 615 9 NO APP EM6A9320BI-5MG 056T 615 9 1 IC EM6A9320BI-5MG 0.11UM"M" FBGA-144 056T 615104 LY61256RL-12E TSOP-1 056T 616 3 PT2308S SO-8 PTC...
  • Page 75 37” LCD TV AOC L37W551B RN200 061T 125220 8 CHIP ARRAY 220HM 1/16W 8P4R RN40 061T 125330 8 RST CHIP AR 8P4R 33 OHM +-5% 1/16W RN35 061T 125330 8 RST CHIP AR 8P4R 33 OHM +-5% 1/16W RN34 061T 125330 8...
  • Page 76 37” LCD TV AOC L37W551B R384 061T0603101 CHIP 100OHM 1/16W R385 061T0603101 CHIP 100OHM 1/16W R386 061T0603101 CHIP 100OHM 1/16W R387 061T0603101 CHIP 100OHM 1/16W R391 061T0603101 CHIP 100OHM 1/16W R639 061T0603101 CHIP 100OHM 1/16W R646 061T0603101 CHIP 100OHM 1/16W...
  • Page 77 37” LCD TV AOC L37W551B R642 061T0603103 CHIP 10KOHM 1/16W R643 061T0603103 CHIP 10KOHM 1/16W R651 061T0603103 CHIP 10KOHM 1/16W R723 061T0603103 CHIP 10KOHM 1/16W R725 061T0603103 CHIP 10KOHM 1/16W R732 061T0603104 CHIP 100K OHM 1/16W R640 061T0603104 CHIP 100K OHM 1/16W...
  • Page 78 37” LCD TV AOC L37W551B R425 061T0603472 CHIP 4.7KOHM 1/16W R424 061T0603472 CHIP 4.7KOHM 1/16W R423 061T0603472 CHIP 4.7KOHM 1/16W R422 061T0603472 CHIP 4.7KOHM 1/16W R420 061T0603472 CHIP 4.7KOHM 1/16W R414 061T0603472 CHIP 4.7KOHM 1/16W R406 061T0603472 CHIP 4.7KOHM 1/16W...
  • Page 79 37” LCD TV AOC L37W551B R222 061T0603680 RST CHIPR 68 OHM +-5% 1/10W R221 061T0603680 RST CHIPR 68 OHM +-5% 1/10W R103 061T0603750 75OHM R104 061T0603750 75OHM R105 061T0603750 75OHM R508 061T0603750 75OHM R511 061T0603750 75OHM R513 061T0603750 75OHM R517...
  • Page 80 37” LCD TV AOC L37W551B C652 065T0603103 32 CHIP 0.01UF 50V X7R C651 065T0603103 32 CHIP 0.01UF 50V X7R C650 065T0603103 32 CHIP 0.01UF 50V X7R C649 065T0603103 32 CHIP 0.01UF 50V X7R C432 065T0603103 32 CHIP 0.01UF 50V X7R...
  • Page 81 37” LCD TV AOC L37W551B C722 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C724 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C727 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C730 065T0603104 12 MLCC 0603 0.1UF K 16V X7R...
  • Page 82 37” LCD TV AOC L37W551B C116 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C114 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C113 065T0603104 12 MLCC 0603 0.1UF K 16V X7R C112 065T0603104 12 MLCC 0603 0.1UF K 16V X7R...
  • Page 83 37” LCD TV AOC L37W551B C515 065T0603223 32 CHIP 0.022UF 50V X7R 0603 C514 065T0603223 32 CHIP 0.022UF 50V X7R 0603 C513 065T0603223 32 CHIP 0.022UF 50V X7R 0603 C512 065T0603223 32 CHIP 0.022UF 50V X7R 0603 C511 065T0603223 32 CHIP 0.022UF 50V X7R 0603...
  • Page 84 37” LCD TV AOC L37W551B C644 065T0805225 17 CHIP 2.2UF 16V Y5V C647 065T0805225 17 CHIP 2.2UF 16V Y5V C648 065T0805225 17 CHIP 2.2UF 16V Y5V C315 067T 312100 3 SMD EC 10UF 16V 85C B C401 067T 312100 3...
  • Page 85 37” LCD TV AOC L37W551B C759 067T 312220 3 SMD EC 22UF 16V 85C C435 067T 312339 3T CHIP EC 3.3UF 16V 85C C438 067T 312339 3T CHIP EC 3.3UF 16V 85C C453 067T 312339 3T CHIP EC 3.3UF 16V 85C...
  • Page 86 37” LCD TV AOC L37W551B L713 071T 56U601 BEAD 600 OHM L101 071T 56U601 BEAD 600 OHM L100 071T 56U601 BEAD 600 OHM L709 071T 56U601 BEAD 600 OHM L710 071T 56U601 BEAD 600 OHM L711 071T 56U601 BEAD 600 OHM...
  • Page 87 37” LCD TV AOC L37W551B 061T0603102 CHIP 1K OHM 1/16W 061T0603102 CHIP 1K OHM 1/16W 061T0603103 CHIP 10KOHM 1/16W 061T0603103 CHIP 10KOHM 1/16W 061T0603112 RST CHIPR 1.1 KOHM +-5% 1/10W 061T0603112 RST CHIPR 1.1 KOHM +-5% 1/10W 061T0603123 RST CHIPR 12 KOHM +-5% 1/10W...
  • Page 88 37” LCD TV AOC L37W551B 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM 061T0603750 75OHM R105 061T0603912 CHIP 9.1K OHM 1/16W...
  • Page 89 37” LCD TV AOC L37W551B 065T0603222 32 CHIP 2200PF 50V X7R 065T0603470 31 CHIP 47PF 50V NPO 065T0603470 31 CHIP 47PF 50V NPO 065T0603470 31 CHIP 47PF 50V NPO C102 065T0603471 31 CHIP 470PF 50V NPO C103 065T0603471 31 CHIP 470PF 50V NPO...
  • Page 90 37” LCD TV AOC L37W551B 067T 4121003XT EC 85 CHIP 10UF M 16V 067T 4121003XT EC 85 CHIP 10UF M 16V 067T 4121003XT EC 85 CHIP 10UF M 16V 067T 4121003XT EC 85 CHIP 10UF M 16V 067T 4121003XT EC 85...
  • Page 91 37” LCD TV AOC L37W551B 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM 071T 56U601 BEAD 600 OHM...
  • Page 92 37” LCD TV AOC L37W551B L903 006T 31 4 1.7MM RIVET BD901 006T 31 4 1.7MM RIVET L907 006T 31 4 1.7MM RIVET T901 006T 31 4 1.7MM RIVET CN901 006T 31500 EYELET L905 006T 31500 EYELET D901 006T 31500...
  • Page 93 37” LCD TV AOC L37W551B J903 095T 90 23 JUMP WIRE J902 095T 90 23 JUMP WIRE J923 095T 90 23 JUMP WIRE J924 095T 90 23 JUMP WIRE J925 095T 90 23 JUMP WIRE J926 095T 90 23 JUMP WIRE...

Table of Contents