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AOC LM960 Service Manual

19” lcd monitor
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AOC LM960

SERVICE MANUAL

19" LCD Monitor
EN9600
LM960S
LM960
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS
BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF
THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.
MANUFACTURE DATE: Aug-24-2005
Page 1 of 54

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Summary of Contents for AOC LM960

  • Page 1: Service Manual

    AOC LM960 SERVICE MANUAL 19” LCD Monitor EN9600 LM960S LM960 THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
  • Page 2 AOC LM960 REVISION DATE MODIFIACTION Aug-24-2005 Page 2 of 54...

  • Page 3: Table Of Contents

    AOC LM960 TABLE OF CONTENTS R e v i s i o n L i s t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 2 Table of Contents ---------------------------------------------------------------------------------------- 03 1.

  • Page 4: Monitor Specifications

    AOC LM960 1. MONITOR SPECIFICATIONS Driving system TFT LCD Size 48cm(19") HSD190ME12 (HSD) Type Pixel pitch 0.294mm(H) x 0.294mm(V) Viewing angle 140(H) 130(V) (R>10) LCD Panel Luminance 250cd/m Contrast Ratio 500:1 Response time 16ms (typ) Display colors 16.2 million Colors R G B Analog 0.7Vp-p...

  • Page 5: L C D M O N I T O R D E S C R I P T I O

    AOC LM960 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, a power board and a keypad board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.

  • Page 6: G E N E R A L I N S T R U C T I O N

    AOC LM960 3. OPERATING INSTRUCTIONS 3.1 GENERAL INSTRUCTIONS Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.

  • Page 7: Adjusting The Picture

    AOC LM960 3.3 ADJUSTING THE PICTURE THE DESCRIPTION FOR CONTROL FUNCTION: Main Main Menu Sub Menu Sub Menu Adjust Menu Description Reset Value Item Item Icon Range Icon Recall Cool Contrast Contrast from Digital-register. 0-100 Contrast Value Luminance Recall Cool...
  • Page 8 AOC LM960 Auto Adjust the H/V Position, Focus Auto Config and Clock of picture. (Analog-Only Do not execute Auto Config, return Model) to main menu. Adjust the horizontal position of the H. Position 0-100 OSD. Adjust the vertical position of the OSD Setup V.

  • Page 9: I N P U T / O U T P U T Sp E C I F I C A T I O

    AOC LM960 4. INPUT/OUTPUT SPECIFICATION 4.1 INPUT SIGNAL CONNECTOR ANALOG D-SUB CONNECTOR PIN NO. DESCRIPTION PI N NO. DESCRIPTION Green Detect Cable Blue DDC-Serial Data Ground H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout Page 9 of 54...

  • Page 10: F A C T O R Y P R E S E T D I S P L A Y M O D E

    AOC LM960 4.2 FACTORY PRESET DISPLAY MODES HORIZONTAL VERTICAL STANDARD RESOLUTION FREQUENCY FREQUENCY 31.47kHz 70.0Hz Dos-mode 720 x 400 640 × 480 31.47kHz 60.0Hz 640 × 480 37.50kHz 75.0Hz 800 × 600 37.879kHz 60.0Hz SVGA 800 × 600 46.875kHz 75.0Hz 1024 ×...

  • Page 11: P A N E L Sp E C I F I C A T I O

    AOC LM960 5. PANEL SPECIFICATION 5.1 GENERAL FEATURE 19”SXGA TFT LCD panel 4 CCFLs Backlight system Supported SXGA (V:1024 lines, H:1280 pixels) resolution Supported to 75Hz refresh rate¦ With LCD Timing Controller Display Characteristics Page 11 of 54...
  • Page 12 AOC LM960 5.2 OPTICAL SPECIFICATION ELECTRICAL SPECIFICATIONS Page 12 of 54...

  • Page 13: G E N E R A L F E A T U R

    AOC LM960 6. BLOCK DIAGRAM 6.1 MONITOR EXPLORED KEY PAD 33G6288-Q1-L LENS 33G6289-1 BEZEL 34G6201AGM-2B PANEL BRACKET 15G6207-R-2 PANEL BRACKET 15G6207-L-2 REAR COVER 34G6202-GM-4B SHIELD 85G6119-4 PANEL BRACKET 15G6207-R-2 HINGE STAND 34G1435-GM-B BASE 34G6203-GM-B HINGE BRACKET 15G6206-1 HINGE BRACKET 15G6206-1...

  • Page 14: Software Flow C Hart

    AOC LM960 6.2 SOFTWARE FLOWING CHART Page 14 of 54...
  • Page 15 AOC LM960 REMARK: 1) MCU initialize. 2) Is the EEprom blank? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode.

  • Page 16: Electrical Block Diagram

    AOC LM960 6.3 ELECTRIAL BLOCK DIAGRAM 6.3.1 MAIN BOARD LCD Interface (CN503) Scalar TSU56AK-LF W78E65P-40 (Include ADC,OSD) (U601) (U401) EPR_SDA EPR_SCL H sync EEPROM V sync AT24C16N (U602) D-Sub Connector (CN301) DDC_SDA, DDC_SCL EEPROM 24C02 (U301) Page 16 of 54...
  • Page 17 AOC LM960 6.3.2 INVERTER/POWER BOARD Page 17 of 54...

  • Page 18: S C H E M A T I

    5.PANEL INTERFACE onPanel_5V/3.3V VCPU VCC12V VCC3.3 VCC2.5 AdjBACKLITE AdjBACKLITE VAA1 VLCD VAA2 VAA3 VAA4 VCC5V Title VLCD 4.SCALER TSU16AK for AOC MST8031 / MST8131 for AOC Size Document Number 2.POWER Date: Wednesday, April 14, 2004 Sheet Page 18 of 54...
  • Page 19 R207 4.7K 1/16W 100K 1/16W C217 Q204 onPanel_5V/3.3V 0.068uF PMBS3904 4.7K 1/16W C207 C208 R211 Title TSU16AK for AOC 100uF/16V MST8031/ MST8131 for AOC 0.1uF 1/16W Size Document Number POWER Date: Friday, November 26, 2004 Sheet Page 19 of 54...
  • Page 20 JACK D306 D307 D308 D309 D310 D311 D312 D313 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 VCC5V Title TSU16AK for AOC MST8031/ MST8131 for AOC Size Document Number INPUT Date: Tuesday, November 09, 2004 Sheet Page 20 of 54...
  • Page 21 BUS TYPE/NC C404 0.1uF C427 BYPASS R401 10uF/16V AVSS_LPLL C428 0.1uF R401 R402 Direct Bus 4.7K Title TSU16AK for AOC MST8031/ MST8131 for AOC 4.7K 3-WIRE Size Document Number SCALER Date: Wednesday, April 14, 2004 Sheet Page 21 of 54...
  • Page 22 LVB2M CONN R502 LVB1P LVB1M 1/16W LVB0P VLCD LVB0M VLCD C509 C510 C511 47uF/16V 0.1uF 0.1uF Title MST8031 / MST8131 for AOC TSU16AK for AOC Size Document Number PANEL INTERFACE Date: Wednesday, April 14, 2004 Sheet Page 22 of 54...
  • Page 23 Mute_key OUT-R+ C606 C608 C610 OUT-L+ C616 C609 OUT-L- OUT-R- C607 0.001uF 0.001uF 0.001uF 1uF/25V 0.001uF 0.001uF CONN Title TSU16AK for AOC MST8031 / MST8131 for AOC Size Document Number Date: Wednesday, July 21, 2004 Sheet Page 23 of 54...
  • Page 24 AOC LM960 7.2 POWER BOARD 715L1142-3AUE Page 24 of 54...
  • Page 25 AOC LM960 Page 25 of 54...
  • Page 26 AOC LM960 Page 26 of 54...
  • Page 27 AOC LM960 8. LAYOUT 8.1 MAIN BOARD 715L1237-1-3 Page 27 of 55...

  • Page 28: P O W E R B O A R

    AOC LM960 8.2 POWER BOARD 715L1142-3AUE 8.3 KEY BOARD 715L1496-1-E Page 28 of 55...

  • Page 29: M A I N Ta I N A B I L I T

    AOC LM960 9. Maintainability 9.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. Page 29 of 55...

  • Page 30: Trouble Shooting

    AOC LM960 9.2 TROUBLE SHOOTING 9.2.1 MAIN BOARD 1. NO SCREEN APPEAR Measured CN201 pin5/6 = 12V? Check Correspondent component. Measured CN201 pin 9/10= 5V? Is there any shortage or cold solder? Measured U202 pin 2= 3.3V? Yes, all DC level exist Yes.
  • Page 31 AOC LM960 2. PANEL POWER CIRCUIT Check R207 should have response from 0V to 5V Measured X601 waveform is normal? When we switch the power switch from off to on Replace X601 (20MHz) Check Q204, Q203 is broken or CN503 solder abnormal?
  • Page 32 AOC LM960 4. U4-DATA OUTPUT Measured X401 waveform is Replace X401(14.318MHz) normal? Check MST8011 (U401) Check relative circuit to panel Signal output (PIN102-103, 106-113,118-125,128,1) Is the waveform ok? Check relative component Check HS/VS input signal are normal? Replace U401 Page 32 of 55...
  • Page 33 AOC LM960 9.2.2 POWER/INVERTER BOARD No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section Measure U201 PIN2=2.5V U202 PIN2=3.3V Check Correspondent component.
  • Page 34 AOC LM960 No picture (LED orange) No picture The button if under control Check X601 oscillate waveform is Correspondent normal component. Measure U202 PIN2=3.3V U201 PIN2=2.5V Replace U601 Check Correspondent component X401 oscillate waveform is normal Check Correspondent component Replace U401...
  • Page 35 AOC LM960 9.2.3 KEYPAD BOARD OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally? Check Main Board...

  • Page 36: White- Balance, Luminance Adjustment

    6500 color temp. parameter is x = 313 20, y = 329 20, Y = 180 cd/m 3. Into factory mode of LM960 Press MENU button during 2 seconds along with press Power button will activate the factory mode, then MCU will do AUTO LEVEL automatically.

  • Page 37: Check List After Replacing Lcd Main Board

    C2/ 7800 º K: cool color x = 296 20 ; y = 311 20; Remark: The value of Y should be confirmed according to different customers. If Customer is AOC so that it’s 170cd/cm required to be larger than (Center).
  • Page 38 Input Serial No. after dual-click the document to be ready for DDC-writing. 3.Input the serial number of the product (For instance: AOC LM729 is 13 bits), then press ENTER to start writing 4.Check the indication of DDC-writing program at the end. When you see the picture as the schematic picture above, the Data compare OK!”...
  • Page 39 AOC LM960 perform well. Please check the power resource and the connection of the signal cable, then return to step 3 by pressing ENTER and re-do it. 5.You can exit the program by pressing Ctrl plus C, then cut the signal cable and the power.
  • Page 40 AOC LM960 12. EDID  112: Page 40 of 55...

  • Page 41: Bom List

    KEPC980KE1 KEY BOARD PWPC1942HSE2 POWER BOARD 15G6207 L 2 PANEL BRACKET 15G6207 R 2 PANEL BRACKET 26G 800504 7 (for LM960) BARCODE 26G 800504 7 (for LM960S) BARCODE 26G 800673 1A (for EN9600) ENVISION BARCODE LABEL 33G4695 1 C CLAMP...
  • Page 42 SCREW M3x6 Q1G 330 6128 SCREW Q1G1030 8128 SCREW 705L980KB34139 19" LCD COVER ASS'Y 705L980KF34014 (for LM960) 19" LCD COVER ASS'Y 705L980KF34010 (for LM960S) 19" LCD COVER ASS'Y 705L980KF34015 (for EN9600) 19" LCD COVER ASS'Y 705L980KP34019 19" LCD COVER ASS'Y 750LLH90E12 1 HSD 19"...
  • Page 43 AOC LM960 PART LIST FOR MAIN BOARD Location Part NO for TPV Description Quantity Units AIC980KH4A5 MAIN BOARD 40G 45762412B CBPC LABEL C204 67G215B221 4H LOW E.S.R 220UF +-20% 2 CN201 33G8027 12 WAFER 2*6P 2.0MM R/A CN301 88G 35315F H...
  • Page 44 AOC LM960 C408 65G0603104 32 CHIP 0.1UF 50V X7R C409 65G0603104 32 CHIP 0.1UF 50V X7R C410 65G0603104 32 CHIP 0.1UF 50V X7R C411 65G0603104 32 CHIP 0.1UF 50V X7R C412 65G0603104 32 CHIP 0.1UF 50V X7R C413 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 45 AOC LM960 D321 93G 39147 TZMC5V6 D322 93G 39147 TZMC5V6 D323 93G 39147 TZMC5V6 D601 93G 6432V LL4148-GS08 FB201 71G 56Z601 CHIP BEAD 600 OHM 0805 FB301 61L0603000 RST SM 0603 JUMP MAX 0R FB302 61L0603000 RST SM 0603 JUMP MAX 0R...
  • Page 46 AOC LM960 R306 61L0603101 RST SM 0603 RC0603 100R R307 61L0603101 RST SM 0603 RC0603 100R R308 61L0603103 RST SM 0603 RC0603 10K R309 61L0603101 RST SM 0603 RC0603 100R R310 61L0603102 RST SM 0603 RC0603 1K P R311 61L0603102...
  • Page 47 AOC LM960 R620 61L0603471 CHIPR 470 OHM+-5% 1/10W R621 61L0603471 CHIPR 470 OHM+-5% 1/10W R622 61L0603471 CHIPR 470 OHM+-5% 1/10W R623 61L0603471 CHIPR 470 OHM+-5% 1/10W R624 61L0603102 RST SM 0603 RC0603 1K P R634 61L0603101 RST SM 0603 RC0603 100R...
  • Page 48 AOC LM960 Location Part NO for TPV Description Quantity Unit AIK980KA4AC MAIN BAORD CN001 33G8027 12 H PIN HEADER 2*6 R/A DP101 81G 12 2 GP GP36032ME/50-ZO SW001 77L 600 1GHJ KEY SWITCH SW002 77L 600 1GHJ KEY SWITCH SW003...
  • Page 49 AOC LM960 Location Part NO for TPV Description Quantity Unit 705L 980 65 02 19" C901 ASS'Y PW1942HSE2SMT POWER BOARD FOR SMT 40G 45762412B CBPC LABEL 1.03 1174 TYPE 705L 560 61 06 R903 ASS'Y 705L 780 57 14 Q901 ASS'Y...
  • Page 50 AOC LM960 L204 73G 174 35YSA FILTER L901 73L 174 29LSH LINE FILTER L903 73G 253 91 LS CHOKE BY LI SHIN PT201 80LL19T 1DNH TRANSFORMER PT202 80LL19T 1DNH TRANSFORMER Q209 57G 761 7 KTD1691P Q210 57G 761 7 KTD1691P...
  • Page 51 AOC LM960 D201 93G2004 2A SM240A DO-214AC D202 93G2004 2A SM240A DO-214AC D203 93G 39S 3 T BZT52-C11 D204 93G 39S 3 T BZT52-C11 D903 93G 6432V LL4148-GS08 F902 61L1206000 4 0 OHM 4A 1/4W IC101 56G 379 37 FP5001DR...
  • Page 52 AOC LM960 R901 61L1206105 CHIP 1MOHM 5% 1/4W R902 61L1206105 CHIP 1MOHM 5% 1/4W R904 61L1206105 CHIP 1MOHM 5% 1/4W R905 61L1206105 CHIP 1MOHM 5% 1/4W R906 61L1206105 CHIP 1MOHM 5% 1/4W R908 61L1206519 CHIPR 5.1OHM +-5% 1/4W R910 61L1206000...
  • Page 53 AOC LM960 D206 93G 64 1152T 1N4148 D207 93G 64 1152T 1N4148 D208 93G 64 1152T 1N4148 D209 93G 64 1152T 1N4148 D210 93G 64 1152T 1N4148 FB101 71G 55 29 FERRITE BEAD FB901 71G 55 29 FERRITE BEAD IC903...
  • Page 54 AOC LM960 R909 61G 17247052T 47OHM 5% 1/4W R913 61G 17220352T 20KOHM 5% 1/4W R915 61G 17230352T 30K OHM5%1/4W T901 6G 31502 1.5MM RIVET 96G 29 10 H.S.TUBE R903 61G152M10458F 100K OHM 5% 2W 90G 415 1 HEATSHINK FOR Q901...

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