AOC LM929 Service Manual
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AOC LM929 Service Manual

AOC LM929 Service Manual

19" lcd monitor
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AOC LM929

SERVICE MANUAL

19" LCD MONITOR
LM929
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 LM929 SERVICE MANUAL 19” LCD MONITOR LM929 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 LM929 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 LM929 Revision List Version Date Revision History TPV Model Name Feb-15-06 Initial Release T980KAQDBCAOW...

  • Page 4: Monitor Specifications

    AOC LM929 1. Monitor Specifications Items Description Driving system TFT Color LCD Type M190EN02 Size 48.0cm(19.0") LCD Panel Pixel pitch 0.294mm (H) x 0.294mm (V) Viewable angle 170(H) 170(V) Response time 25 ms Sync. Type H/V TTL 15Pin Analog Input Signal...

  • Page 5: Lcd Monitor Description

    AOC LM929 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 LM929 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 LM929 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 LM929 Adjust the horizontal position of H. Position 0-100 the OSD. Adjust the vertical position of OSD Setup V. Position 0-100 the OSD. OSD Timeout Adjust the OSD timeout. 10-120 Set OSD display language to English English. Set OSD display language to Deutsch German.

  • Page 9: Input/Output Specification

    AOC LM929 4. Input/Output Specification 4.1 Input Signal Connector 1. D-SUB connector Pin No. Description Pin No. Description Red Video No Pin! Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync Red Ground V-Sync Green Ground...

  • Page 10: Power Supply Requirements

    AOC LM929 4.2 Power Supply Requirement A/C Line voltage range : 100 V ~ 240 V : 50 ± 3Hz, 60 ± 3Hz A/C Line frequency range Input Current : 1.5A max at 100V; 0.8A max at 240 V Peak surge current : <...

  • Page 11: Factory Preset Display Modes

    AOC LM929 4.3 Factory Preset Display Modes VESA MODES Horizontal Vertical Nominal Sync Nominal Sync Nominal Frequency Polarity Freq. Polarity Pixel Mode Resolution Total +/- 0.5kHz +/- 1 Hz Clock (MHz) 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861...

  • Page 12: Panel Specification

    AOC LM929 4.4 Panel Specification 4.4.1 General Features This specification applies to the 19.0 inch Color TFT-LCD Module M190EN02. The display supports the SXGA (1280(H) x 1024(V)) screen format and 16.7M colors (RGB 8-bits data). All input signals are 2 Channel LVDS interface compatible.

  • Page 13: Electrical Characteristics

    AOC LM929 4.4.4 Electrical Characteristics 1. TFT LCD Module 2. Backlight Unit...

  • Page 14: Block Diagram

    AOC LM929 5. Block Diagram 5.1 Monitor Exploded View BEZEL 34G1239 PANEL MAIN FRAME 15G5960 REAR COVER SHIELD 85G651-5 34G1240 HINGE ASSY W33G4673AGM-L 37G478-1 COVER VESA 33G4646 GM L COVER TILT BUTTON FUNC 33G4642 KEY BOARD KEPC980KA1 SPK BOX COVER -R...

  • Page 15: Software Flowing Chart

    AOC LM929 5.2 Software Flowing Chart...
  • Page 16 AOC LM929 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 LM929 5.3 Electrical Block Diagram 5.3.1 Main Board Crystal LCD Interface 11.0592MHz (CN503) (X601) Scalar IC MST8131A W78E65P (Include ADC, OSD) (U601) (U401) EPR_SDA EPR_SCL H sync D-Data V sync Key Board D-Clock EEPROM Control M24C16 (U602) DVI-I only...

  • Page 18: Inverter/Power Board

    AOC LM929 5.3.2 Inverter/Power Board AC input Bridge Rectifier IC101 Transformer Rectifier diode EMI filter and Filter Start Circuit: R906 R907 CN902 Feedback Over Voltage Circuit Control IC Protect ON/OFF OSC and MOSFET DC Convert Output Circuit Circuit Lamp Over...

  • Page 19: Schematic

    AOC LM929 6. Schematic 6.1 Main Board 715L1150-B MST8131A 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 LM929 VCC5V+ VCC5V SOT-223 D202 U201 VCC12V DIODE R202 VCC2.5 VCC12V RT9164-25CG CON402(PITCH 2.54) 1/16W VCC2.5 CN201 ON_OFF R201 4.7K 1/16W C210 C211 C212 VCC5V VCC12V VCC12V D201SCHOTTEYDIODE C201 R212 4.7K 1/16W 0.1uF 47uF/16V 0.1uF VCC5V VCC5V VCC5V+ onBACKLITE 6 0.1uF...
  • Page 21 AOC LM929 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 R305 1/16W C308 0.047uF GNDR R306 1/16W C309 0.047uF...
  • Page 22 AOC LM929 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 LM929 PA[0..9] PA[0..9] LVA3P LVA3M CN503 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 LM929 VCPU VCPU RP601 RP602 R601 R602 C601 10Kx4 10Kx4 C602 22pF U601 Y601 POWER EA/VP P0.0 ENTER P0.1 C603 11.0592MHZ RIGHT XTAL1 P0.2 LEFT P0.3 VCPU 10u/16V AUTO P0.4 U603 MAX810STR (NC) LED_B XTAL2 P0.5 C604 22pF LED_O P0.6...

  • Page 25: Power Board

    AOC LM929 6.2 Power Board 715G1142-4-AUE...
  • Page 26 AOC LM929...
  • Page 27 AOC LM929...

  • Page 28: Audio Board

    L108 Title 2003/07/18 э TI_TDA3003D2/TDA3002D2 3W/9W AUDIO CN101 PIN 5 GND, PIN6 CGND DGND 600 OHM 600 OHM C137-C140 0.1UF FOR EMI 0905 Size Document Number /SHUTDOWN,PIN7 AOC 19"LCD MONITOR FOR LM929 VOLUME,PIN8 MUTE Date: Tuesday, October 28, 2003 Sheet...

  • Page 29: Pcb Layout

    AOC LM929 7. PCB Layout 7.1 Main Board 715L1150-B...

  • Page 30: Power Board

    AOC LM929 7.2 Power Board 715G1142-4AUE...

  • Page 31: Audio Board

    AOC LM929 7.3 Audio Board 715L1178-1 7.4 Key Board 715L1170-1 7.5 CNPC Board 715L1131-1-17...

  • Page 32: Maintainability

    AOC LM929 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 33: Trouble Shooting

    AOC LM929 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 34 AOC LM929 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 35 AOC LM929 White screen White screen Measure Q204 base X601 oscillate waveform is normal is low level? Replace X601 Check Q204, Q203 are Check reset circuit of broken or CN503 solder? U601 is normal Check Correspondent Check Correspondent component. component.

  • Page 36: Power/Inverter Board

    AOC LM929 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 circut Check start voltage for the pin3 of IC901...
  • Page 37 AOC LM929 2.) No Backlight Check CN902 pin2, 4 = 12V Check adapter or Main Board Check ON/OFF signal Check Main Board Check U201 pin9=12V Change Q201 or Q202 Check U201 PIN1 have the output of sawtooth wave at short time Change U201 Check D201 (-)/ D202 (-) have the output of square wave at short time.

  • Page 38: Keypad Board

    AOC LM929 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 39: White-Balance, Luminance Adjustment

    6500 color temp. parameter is x = 313 20, y = 329 20, Y =180 cd/m 3. Into factory mode of AOC LM929 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 40: Edid Content

    AOC LM929 10. EDID Content 1.Analog EDID 112: 2.Digital EDID 112:...

  • Page 41: Bom List

    AOC LM929 11. BOM List T980KAQDBCAOW Location Part No. for TPV Description Quantity Unit Q1G 330 8120 SCREW 3X8mm AUPC980A3T AUDIO BOARD CBPC980KAQAC1 CONVERSION BOARD FOR T9 KEPC980KA1 KEY BOARD FOR T980K PWPC1942AUE2 POWER BOARD ASS'Y 11G6038 1 CABLE MANAGEMENT HOOK...
  • Page 42 AOC LM929 85G 651 5 AMIN SHIELD 89G 173 56507 AUDIO CABLE 89G1748LAADVI DVI CABLE 89G404A18N YH POWER CABLE 95G8014 16 7 HARNESS 95G8018 30 21 HARNESS M1G 140 10128 SCREW M1G 330 4128 SCREW M3X4 M1G 330 6128 SCREW M1G1025 5120 SCREW M2.5X5...
  • Page 43 AOC LM929 C118 65G0603102 32 1000PF +-10% 50V X7R C120 65G0603102 32 1000PF +-10% 50V X7R C121 65G0603104 12 CER2 0603 X7R 16V 100N C122 65G0603104 12 CER2 0603 X7R 16V 100N C123 65G0603102 32 1000PF +-10% 50V X7R C125 65G0603103 32 0.01UF +-10% 50V X7R...
  • Page 44 AOC LM929 CN601 33G8022 14 H PIN EADER CN602 33G8027 16 WAFER 16PIN 2.0mm DIP X401 93G 22 53 CRYSTAL 14.318MHzHC-49U X601 93G 22 55 H 20MHZ/20PF/49US 40G 457624 1B LABEL-CPU 715L1150 B MAIN BOARD PCB C201 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 45 AOC LM929 C412 65G0603104 32 CHIP 0.1UF 50V X7R C413 65G0603104 32 CHIP 0.1UF 50V X7R C414 67G 312100 3 SMD 10UF +-20% 16V C415 65G0603104 32 CHIP 0.1UF 50V X7R C416 65G0603104 32 CHIP 0.1UF 50V X7R C417 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 46 AOC LM929 D302 93G 6433P BAV99 SOT-23 D303 93G 6433P BAV99 SOT-23 D304 93G 64 42 P BAV70 SOT-23 D305 93G 64 42 P BAV70 SOT-23 D314 93G 39147 TZMC5V6 D315 93G 39147 TZMC5V6 D316 93G 39147 TZMC5V6 D317 93G 39147...
  • Page 47 AOC LM929 R206 61L0603103 RST SM 0603 RC0603 10K R207 61L0603472 RST SM 0603 RC0603 4K7 R208 61L0603103 RST SM 0603 RC0603 10K R209 61L0603000 RST SM 0603 JUMP MAX 0R R211 61L0603103 RST SM 0603 RC0603 10K R212 61L0603472...
  • Page 48 AOC LM929 R602 61L0603103 RST SM 0603 RC0603 10K R603 61L0603103 RST SM 0603 RC0603 10K R604 61L0603103 RST SM 0603 RC0603 10K R605 61L0603103 RST SM 0603 RC0603 10K R606 61L0603103 RST SM 0603 RC0603 10K R607 61L0603103 RST SM 0603 RC0603 10K...
  • Page 49 AOC LM929 715L1170 1 PCB BOARD CN101 33G8023 8 WAFER 2.0MM 4PIN SMT DP101 81G 14 4 HL MAB10-1104GYC-C R101 61L0603000 RST SM 0603 JUMP MAX 0R R102 61L0603000 RST SM 0603 JUMP MAX 0R R103 61L0603000 RST SM 0603 JUMP MAX 0R...
  • Page 50 AOC LM929 C906 65G 2K152 5E6921 1500 PF 10% 2KV Y5P C914 67G215L102 3R LOW E.S.R 1000UF +/-20% C915 67G215L102 3R LOW E.S.R 1000UF +/-20% C916 67G215S471 3K EC 470UF 16V C921 65G306M4722BP 4700PF +-20% 400VAC C950 65G306M3322BP 3300PF 20%...
  • Page 51 AOC LM929 C102 65G0805104 32 CHIP 0.1U 50V X7R C107 65G0805104 32 CHIP 0.1U 50V X7R C112 65G0603104 32 CHIP 0.1UF 50V X7R C114 65G0603104 32 CHIP 0.1UF 50V X7R C115 65G0603104 32 CHIP 0.1UF 50V X7R C202 65G0805104 22 0.1UF +-10% 25V X7R 080...
  • Page 52 AOC LM929 Q102 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q103 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q201 57G 760 5A DTC 144WN3/S SOT-23 Q202 57G 760 4A DTA144WN3/S SOT-23 Q203 57G 763 3 AO4411 SO-8 Q204 57G 763 3 AO4411 SO-8 Q205 57G 417 4...
  • Page 53 AOC LM929 R911 61L0805240 2F CHIP 24KOHM 1% 1/8W R912 61L0805203 CHIPR 20KOHM +-5% 1/8W R916 61L0805472 CHIRP 4.7K OHM +-5% 1/8 R917 61L0805101 CHIPR 100 OHM +-5% 1/8W R918 61L0805472 CHIRP 4.7K OHM +-5% 1/8 R919 61L1206470 CHIP 47OHM 5% 1/4W...
  • Page 54 AOC LM929 J032 71G 55 19 T FERRITE BEAD D9X3. 5X0. J054 71G 55 29 FERRITE BEAD L902 6G 31502 1.5MM RIVET NR901 6G 31502 1.5MM RIVET PT201 6G 31502 1.5MM RIVET PT202 6G 31502 1.5MM RIVET R111 61G 21015352T...
  • Page 55 AOC LM929 R903 61G152M10458F 100K OHM 5% 2W 90G 415 1 HEATSHINK FOR Q901 M1G1730 8128 SCREW M3x8 Q901 57G 724 4A STP9NK60ZEP 96G 29 6 SHRINK TUBE UL/CSA R914 61G 2J22858H 0.22OHM 2W +-5% NR901 61G 58050 WT NTC 5 OHM 5A...
  • Page 56 AOC LM929 Q1G1030 8128 SCREW W33G4646 GM L COVER LIFT W33G4649 GM T HOLDER LIFT CNPC980A3 715L1131 1 17 CN301 33G3802 4H WAFER 4P RIGHT ANGLE CN302 33G3802 2H WAFER 2P RIGHT ANGLE CN303 33G3802 2H WAFER 2P RIGHT ANGLE...

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