AOC LM965 Service Manual
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AOC LM965 Service Manual

AOC LM965 Service Manual

19" lcd monitor
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AOC LM965

SERVICE MANUAL

19" LCD MONITOR
LM965
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.
1

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  • Page 1: Service Manual

    AOC LM965 SERVICE MANUAL 19” LCD MONITOR LM965 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...

  • Page 2: Table Of Contents

    AOC LM965 Table of Content Revision List…………………………………………………………………………………………………………. 1. Monitor Specifications………………………………………………………………………………………….. 2. LCD Monitor Description……………………………………………………………………………………….. 3. Operating Instructions………………………………………………………………………………………….. 3.1 General Instructions…………………………………………………………………………………………... 3.2 Front Panel Control……………………………………………………………………………….………….. 3.3 Adjusting the Picture………………………………………………………………………………………….. 4. Input/Output Specification……………………………………………………………………………………... 4.1 Input Signal Connector……………………………………………………………………………………….. 4.2 Power Supply Requirements………………………………………………………………………………… 4.3 Factory Preset Display Modes………………………………………………………………………………..

  • Page 3: Revision List

    AOC LM965 Revision List Version Date Revision History TPV Model Name Jan-18-06 Initial Release T980KA4DB4AOA...

  • Page 4: Monitor Specifications

    AOC LM965 1. Monitor Specifications Items Description Driving system TFT Color LCD Type M190EN04 Size 48.0cm(19.0") LCD Panel Pixel pitch 0.294mm (H) x 0.294mm (V) Viewable angle 140(H) 135(V) Response time 8 ms Sync. Type H/V TTL Input Signal 15Pin Analog...

  • Page 5: Lcd Monitor Description

    AOC LM965 2. LCD Monitor Description The LCD MONITOR will contain a main board, a power board, a keypad board and an audio 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: Operating Instructions

    AOC LM965 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 LM965 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 LM965 Model) Do not execute Auto Config, return to main menu. Adjust the horizontal position of H. Position 0-100 the OSD. Adjust the vertical position of the OSD Setup V. Position 0-100 OSD. Adjust the OSD timeout. 10-120 Timeout...

  • Page 9: Input/Output Specification

    AOC LM965 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description No Pin! Green Logic Ground Blue Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout 4.2 Power Supply Requirement...

  • Page 10: Factory Preset Display Modes

    AOC LM965 4.3 Factory Preset Display Modes VESA MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Total Frequency Freq. Polarity Polarity Clock +/- 0.5kHz +/- 1 Hz (MHz) 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861...

  • Page 11: Panel Specification

    AOC LM965 4.4 Panel Specification 4.4.1 General Description This specification applies to the 19.0 inch Color TFT-LCD Module M190EN04. The display supports the SXGA (1280(H) x 1024(V)) screen format and 16.2M colors. All input signals are 2 Channel LVDS interface compatible.

  • Page 12: Optical Characteristics

    AOC LM965 4.4.3 Optical Characteristics...

  • Page 13: Electrical Characteristics

    AOC LM965 4.4.4 Electrical Characteristics 1. TFT LCD Module 2. Backlight Unit...

  • Page 14: Block Diagram

    AOC LM965 5. Block Diagram 5.1 Monitor Exploded View...

  • Page 15: Software Flow Chart

    AOC LM965 5.2 Software Flowing Chart...
  • Page 16 AOC LM965 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 17: Electrical Block Diagram

    AOC LM965 5.3 Electrical Block Diagram 5.3.1 Main Board Crystal LCD Interface 20MHZ (CN503) (X601) Scalar IC TSU16AK W78E65 (Include ADC, OSD) (U601) (U401) EPR_SDA EPR_SCL H sync V sync EEPROM Key Board 24LC16B Control (U602) D-Sub Crystal 14.318MHZ Connector...

  • Page 18: Inverter/Power Board

    AOC LM965 5.3.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit CN902 R906, R907 Feedback Over IC101 Voltage Circuit Protect Control IC ON/OFF OSC and DC Convert MOSFET Output Circuit Circuit Lamp Feedback...

  • Page 19: Schematic

    AOC LM965 6. Schematic 6.1 Main Board 715L1237-1-3 TSU16AK SCHEMATIC GNDR GNDR GNDG GNDG DDC_CLK VCC2.5 VCC3.3 VAA1 VAA2 VAA3 VAA4 DDC_DAT GNDB GNDB ST_DET1 HSYNC HSYNC ST_DET2 VSYNC VSYNC VCC2.5 VCC3.3 VAA1 VAA2 VAA3 CLK+ CLK+ VAA4 CLK- CLK- 3.INPUT...
  • Page 20 AOC LM965 VCC5V+ VCC5V SOT-252 D202 VCC12V U201 R202 GS1D VCC2.5 VCC12V RT9164 CN201 1/16W VCC2.5 ON_OFF R201 4.7K 1/16W C210 C211 C212 VCC12V VCC12V D201 SS14 C201 R212 4.7K 1/16W 0.1uF 47uF/16V 0.1uF VCC5V+ VCC5V VCC5V VCC5V onBACKLITE 6 0.1uF...
  • Page 21 AOC LM965 CN301 DB15 FB301 1/16W R301 1/16W C304 0.047uF FB302 1/16W R302 1/16W C305 0.047uF FB303 1/16W R303 1/16W C306 0.047uF R304 1/16W C307 0.001uF PC5V R325 C301 C302 C303 VGA_CON 1/16W D322 D323 R305 1/16W C308 0.047uF GNDR...
  • Page 22 AOC LM965 VCC3.3 FB401 VCC2.5 FB402 VCC3.3 VCC2.5 600 OHM 600 OHM C405 C414 10uF/16V 10uF/16V VPLL VDVI VDPLL C406 C407 C408 C409 C410 C411 C412 C413 C415 C416 C417 C418 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 23 AOC LM965 PA[0..9] PA[0..9] LVA3P CN503 LVA3M LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVBCKM RXOC- RXOC+ LVBCKP LVA1P RXO3- RXO3+ LVB3M LVB3P LVA1M LVA0M RXE0- RXE0+ LVA0P LVA1M RXE1- RXE1+...
  • Page 24 AOC LM965 VCPU VCPU RN601 R601 R602 C601 RN602 1/16W 1/16W 1/16W 0.1uF 1/16W C602 22pF U601 X601 POWER EA/VP P0.0 ENTER P0.1 RIGHT XTAL1 P0.2 C603 20MHz LEFT P0.3 10uF/16V VCPU AUTO P0.4 U603 MAX810STR LED_B XTAL2 P0.5 C604 22pF LED_O P0.6...

  • Page 25: Power Board

    AOC LM965 6.2 Power Board 715G1349-2...
  • Page 26 AOC LM965...
  • Page 27 AOC LM965...
  • Page 28 AOC LM965...

  • Page 29: Audio Board

    AOC LM965 6.3 Audio Board 715L1144-3NMV OUT_L OUT_R +12V PIN-3 CN202 MUTE PIN-1 VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF WAFER 2*7P 2.54mm U201 TDA7496L CN204 C205 CN203 C204 0.47uF R201 10K OUTL 470uF/16V C206 0.47uF OUTR R203 R212 C207...

  • Page 30: Pcb Layout

    AOC LM965 7. PCB Layout 7.1 Main Board 715L1237-1-3...

  • Page 31: Power Board

    AOC LM965 7.2 Power Board 715G1349-2...

  • Page 32: Audio Board

    AOC LM965 7.3 Audio Board 715L1144-3-NMV 7.4 Key Board 715L1496-1-E...

  • Page 33: Maintainability

    AOC LM965 8. Maintainability 8.1 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 34: Trouble Shooting

    AOC LM965 8.2 Trouble Shooting 8.2.1 Main 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 Adapter/Inverter section Measure U201 PIN2=2.5V U202 PIN2=3.3V...
  • Page 35 AOC LM965 No picture (LED orange) No picture The button if X601 oscillate Replace X601 under control waveform is normal Check reset circuit of Check Correspondent component U601 is normal Measure U201 PIN2=2.5V U202 PIN2=3.3V Replace U601 Replace U201, U202...
  • Page 36 AOC LM965 White screen White screen Measure Q204 base X601 oscillate waveform is normal is low level? Replace X601 Check Q204 is broken or Check reset circuit of CN503 solder? U601 is normal Check Correspondent Check Correspondent component. component. Replace PANEL...

  • Page 37: Power/Inverter Board

    AOC LM965 8.2.2 Power/Inverter Board 1) No power Check CN902 pin2,4 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901...
  • Page 38 AOC LM965 2.) W / LED, No Backlight Check CN902 pin2, 4 = 12V Check adapter board Check ON/OFF signal Check Main Board Check IC201 pin5=12V Change Q207, Q205, Q206, ZD203 Check IC201 PIN18 have the output of sawtooth wave at short...

  • Page 39: Keypad Board

    AOC LM965 8.2.3 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 40: White-Balance, Luminance Adjustment

    = 313 20, y = 329 20, Y =180 cd/m 3. Into factory mode of AOC LM965 Turn on power, press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
  • Page 41 AOC LM965 C. Adjust sRGB color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 5 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 313...

  • Page 42: Edid Content

    AOC LM965 10. EDID Content 112:...

  • Page 43: Bom List

    AOC LM965 11. BOM List T980KA4DB4AOA Location Part No. for TPV Description Quantity Unit Q1G 330 6128 SCREW AUPC980KA8 AUDIO BOARD FOR T980K* CBPC980KA4ACA CONVERSION BAORD KEPC980KADE1 POWER BOARD PWPC1942AUE7 POWER BOARD 15G6207 B PANEL BRACKET 15G6207 L PANEL BRACKET...
  • Page 44 AOC LM965 95G8018 30612 LVDS M1G 330 6128 SCREW M1G 330 6128 SCREW M1G1140 6128 SCREW 4X6 M1G1730 6128 SCREW M3x6 M1G3030 6128 SCREW Q1G 330 6128 SCREW 705L980KB34156 19" LCD COVER ASS'Y 705L980KF34019 19" LCD COVER ASS'Y 705L980KP34019 19" LCD COVER ASS'Y...
  • Page 45 AOC LM965 CN202 33G802414C H 2*7PIN DUAL ROW RIGHT A CN204 33G3278 3 3P PLUG B3B-XHA/JST U201 56G 616 1 TDA7496 AUPC980KA8AI AUDIO BOARD FOR T980K* C203 65G0805104 32 CHIP 0.1U 50V X7R C204 65G0805474 22 CHIP 0.47UF 25V X7R 080...
  • Page 46 AOC LM965 CN301 88G 35315F H D-SUB 15PIN CN503 33G802724B H WAFER CN601 33G801714A H PIN HEADER 2*7 R/A CN602 33G8027 16 WAFER 16PIN 2.0mm DIP X401 93G 22 53 J 14.31818MHZ/32PF/49US X601 93G 22 55 J 20MHz/20PF/49US 40G 457624 1B...
  • Page 47 AOC LM965 C412 65G0603104 32 CHIP 0.1UF 50V X7R C413 65G0603104 32 CHIP 0.1UF 50V X7R C415 65G0603104 32 CHIP 0.1UF 50V X7R C416 65G0603104 32 CHIP 0.1UF 50V X7R C417 65G0603104 32 CHIP 0.1UF 50V X7R C418 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 48 AOC LM965 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 49 AOC LM965 R303 61L0603101 RST SM 0603 RC0603 100R R304 61L0603471 CHIPR 470 OHM+-5% 1/10W R305 61L0603101 RST SM 0603 RC0603 100R R306 61L0603101 RST SM 0603 RC0603 100R R307 61L0603101 RST SM 0603 RC0603 100R R308 61L0603103 RST SM 0603 RC0603 10K...
  • Page 50 AOC LM965 R617 61L0603121 CHIPR 120 OHM 1/10W R618 61L0603121 CHIPR 120 OHM 1/10W R619 61L0603472 RST SM 0603 RC0603 4K7 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...
  • Page 51 AOC LM965 R101 61G 60275052T 75OHM 5% 1/6W R102 61G 60275052T 75OHM 5% 1/6W PWPC1942AUE7 PW1942AUE7SMT POWER BOARD FOR SMT 40G 45762420A ID LABEL 1.03 705L 560 61 06 R903 ASS'Y 705L 780 57 51 Q901 ASS'Y 705L 980 87 05...
  • Page 52 AOC LM965 L101 73G 253152 T CHOKE COIL TDK LSHAOO3C L902 73L 174 53 LG GP CHOKE L903 73G 253 91 LS CHOKE BY LI SHIN L904 73L 174 26T1G LINE LILT 0.45MM NR901 61G 58050 WT NTC 5 OHM 5A...
  • Page 53 AOC LM965 C231 65G1206225 17 1206 2.2UF -20%~+80% 16 C232 61L0805303 CHIP 30K OHM 1/8W C233 65G1206225 17 1206 2.2UF -20%~+80% 16 C234 65G1206225 17 1206 2.2UF -20%~+80% 16 C235 65G0805104 32 CHIP 0.1U 50V X7R C240 65G0805104 32 CHIP 0.1U 50V X7R...
  • Page 54 AOC LM965 D903 93G 6432V LL4148-GS08 F201 61L1206000 4 0 OHM 4A 1/4W IC101 56G 379 37 FP5001DR IC201 56G 608 7 OZT1060GN SOIC-20 IC901 56G 379 33 SG6841SZ Q101 57G 763 3 AO4411 SO-8 Q102 57G 417 4 PMBS3904/PHILIPS-SMT(04...
  • Page 55 AOC LM965 R207 61L0805103 CHIPR 10K OHM +-5% 1/8W R209 61L0805220 CHIP 22 OHM 5% 0805 1/8 R210 61L0805431 CHIP 430OHM 5% 0805 1/8 R212 61L0805153 CHIPR 15K OHM+-5% 1/8W R213 61L0805362 CHIP 306KOHM 1/8W R214 61L0805000 CHIP O OHM 1/8W...
  • Page 56 AOC LM965 R904 61L1206105 CHIP 1MOHM 5% 1/4W R905 61L1206105 CHIP 1MOHM 5% 1/4W R906 61L1206105 CHIP 1MOHM 5% 1/4W R907 61L1206105 CHIP 1MOHM 5% 1/4W R908 61L1206519 CHIPR 5.1OHM +-5% 1/4W R909 61L0805100 CHIPR 10 OHM+-5% 1/8W R910 61L1206221...
  • Page 57 AOC LM965 FB901 71G 55 29 FERRITE BEAD IC903 56G 158 4 T H431BA JP204 71G 55 19 T FERRITE BEAD D9X3. 5X0. L902 6G 31502 1.5MM RIVET L904 6G 31502 1.5MM RIVET NR901 6G 31502 1.5MM RIVET PT201 6G 31502 1.5MM RIVET...

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