AOC LM92SV Service Manual
  1. Manuals
  2. Brands
  3. AOC Manuals
  4. Monitor
  5. LM92SV
  6. Service manual
AOC LM92SV Service Manual

AOC LM92SV Service Manual

19 inch lcd monitor
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
AOC LM92SV

SERVICE MANUAL

19" LCD Monitor
LM92SV
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 RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
1

Advertisement

Table of Contents
loading

Related Manuals for AOC LM92SV

Summary of Contents for AOC LM92SV

  • Page 1: Service Manual

    AOC LM92SV SERVICE MANUAL 19” LCD Monitor LM92SV 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 RELIABILITY FOR...

  • Page 2: Table Of Contents

    AOC LM92SV Table of Content Revision List…………………………………………………………………………………………………………. 1. Monitor Description…………………………………………………………………………………………….. 2. LCD Monitor Description……………………………………………………………………………………….. 3. Operating Instructions………………………………………………………………………………………….. 3.1 General Instructions…………………………………………………………………………………………... 3.2 Control Buttons………………………………………………………………………………………………... 3.3 Adjusting the Picture………………………………………………………………………………………….. 4. Input/Output Specification……………………………………………………………………………………... 4.1 Input Signal Connector……………………………………………………………………………………….. 4.2 Factory Preset Display Modes……………………………………………………………………………….. 4.3 Power Supply Requirements…………………………………………………………………………………...

  • Page 3: Revision List

    AOC LM92SV REVISION LIST Revision Date TPV Name Change Description Nov-16-05 T980KA3HBAA9KP Original Revision...

  • Page 4: Monitor Description

    AOC LM92SV 1. MONITOR SPECIFICATIONS Driving system TFT Color LCD Size 48.0cm(19.0") Type M190EN03 LCD Panel Pixel pitch 0.294mm(H) x 0.294mm(V) Viewable angle 170 (H) 170 (V) (CR=10) Response time (type) 8ms for AU panel Sync. Type H/V TTL Input H-Frequency 30kHz –...

  • Page 5: Lcd Monitor Description

    AOC LM92SV 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, an inverter board, a keypad board and an adapter board which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel and DC-DC conversion.

  • Page 6: Operating Instructions

    AOC LM92SV 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 LM92SV 3.3 ADJUSTING THE PICTURE Adjustment steps: 1. Press the MENU-button to activate the OSD window. 2. Press < or > to select the desired function. 3. Press the MENU-button to select the function that you want to adjust.
  • Page 8 AOC LM92SV User / Red Red Gain from Digital-register. User / Green Green Gain Digital-register. User / Blue Blue Gain from Digital-register. Analog Select input signal from analog Input Select source (D-Sub) Select input signal from digital Digital source (DVI) Adjust the horizontal position of the H.

  • Page 9: Input/Output Specification

    AOC LM92SV 4. INPUT/OUTPUT SPECIFICATION 4.1 INPUT SIGANAL CONNECTOR 1 D-SUB connector PIN NO. DESCRIPTION PI N 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...

  • Page 10: Factory Preset Display Modes

    AOC LM92SV 4.2 FACTORY PRESET DISPLAT MODES VESA MODES Horizontal Vertical Mode Resolution Total Nominal Sync Nominal Sync Nominal 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861 72.809 31.500 640x480@75Hz 840 x 500 37.500 75.00 31.500...

  • Page 11: Panel Specification

    AOC LM92SV 4.4 PANEL SPECIFICATION 4.4.1 General feature This specification applies to the 19.0 inch Color TFT-LCD Module M190EN03 V0. 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 12: Optical Characteristics

    AOC LM92SV 4.4.3 Optical Characteristics...

  • Page 13: Parameter Guide Line For Ccfl Inverter

    AOC LM92SV 4.4.4 Parameter guide line for CCFL Inverter 1 TFT LCD Module 2 Backlight Units...

  • Page 14: Block Diagram

    AOC LM92SV 5. BLOCK DIAGRAM 5.1 MONITOR EXPLODED VIEW 15G6237-4 34G1388 MAIN FRAME BACK COVER 34G1387 85G 676-2 750LLU90N30 BEZEL SHIELD PANEL 34G1393 BASE COVER 37G 504-1 HINGE 34G1390 STAND UPPER 52G6025-11699 INSULATE SHEET 33G4760 33G4759 LENS KEY PAD 34G1391...

  • Page 15: Software Flow Chart

    AOC LM92SV 5.2 SOFTWARE FLOW CHART...
  • Page 16 AOC LM92SV 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 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 LM92SV 5.3 ELECTRICAL BLOCK DIAGRAM 5.3.1 Main Board LCD Interface (CN406) Scalar IC MST6151A W78E65A40 (Include ADC, OSD) (U402) (U401) EPR_SDA EPR_SCL H sync D_H sync V sync D_V sync EEPROM Key Board D_RGB AT24C16N Control (U403) DVI-I only...

  • Page 18: Inverter/Power Board

    AOC LM92SV 5.3.2 Inverter/Power Board Bridge Rectifier AC input Transformer Rectifier diode EMI filte r and Filter Start Circuit: R903 R904 CN102 Feedback Over Voltage Control IC Circuit Protect ON/OFF OSC and MOSFET DC Convert Output Q203/Q204 Circuit Circuit Lamp...
  • Page 21 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 10uF/16V 0.1uF 0.1uF 22uF/16V...

  • Page 30: Pcb Layout

    AOC LM92SV 7. PCB LAYOUT 7.1 MAIN BOARD 715G1510-F...

  • Page 31: Adapter Board

    AOC LM92SV 7.2 ADAPTER BOARD 715G901-1-8...

  • Page 32: Inverter Board

    AOC LM92SV 7.3 INVERTER BOARD 715G1299-1-3 7.4 KEY BOARD 715G1317-A-7...

  • Page 33: Maintainability

    AOC LM92SV 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 LM92SV 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 U103 PIN2=1.8V U101,U102,U105 PIN2=3.3V...
  • Page 35 AOC LM92SV No picture (LED orange) No picture The button if X402 oscillate Replace X402 under control waveform is normal Check reset circuit of Check Correspondent component U402 is normal Measure U103 PIN2=1.8V U101,U102,U105PIN2=3.3V Replace U402 Replace U103, U105 X401 oscillate...
  • Page 36 AOC LM92SV White screen White screen Measure Q105 base X402 oscillate waveform is normal is low level? Replace X402 Check Q105, Q106 is Check reset circuit of broken or CN406 solder? U402 is normal Check Correspondent Check Correspondent component. component.

  • Page 37: Inverter/Power Board

    AOC LM92SV 8.2.2 Power/Inverter Board W / LED, No Backlight Check CN102 pin5=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 square wave at short time Change U201 Check D203 (-)/ D204 (-) have the output of square wave at short time.

  • Page 38: Keypad Board

    AOC LM92SV 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? Is Key Pad Board normally? Replace Key Pad Board 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 LM92SV 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 LM92SV 10. EDID CONTENT 1. Analog EDID 112: 2. Digital EDID 112:...

  • Page 41: Bom List

    AOC LM92SV 11. BOM LIST T980KA3HBAA9KP Location Part NO. for TPV Description Quantity Unit ADPC1260AEP LCD ADAPTER BOARD ASS'Y CBPC980KA3ACKP CONVERSION BOARD IDPC1942AUE3P INVERTER BOARD KEPC980KA9KP KEY BOARD 12G 412 1 FOOT_HEAD(T1.2mm) 15G6237 4 MAIN FRAME 26G 800504 3 BARCODE...
  • Page 42 AOC LM92SV 705L980KB34043 12G 394 3 RUBBER FOOT 20G 017 1 DIECASTING BASE 33G4761 AI C STAND PLATE 34G1389AIE B VESA COVER 34G1390 GM B STAND UPPER 34G1391 GM B STAND LOWER 34G1392 GM B HINGE COVER 34G1393AGM B BASE COVER...
  • Page 43 AOC LM92SV C912 67G215C102 4H 1000UF 25V LZ HER MEI C919 65G306M4722BP 4700PF +-20% 400VAC C920 67G215C102 4H 1000UF 25V LZ HER MEI CN901 87G 501 11 RF AC SOCKET D901 93G 6026T52T RECTIFIER DIODE FR107 D902 93G 6038T52T FR103...
  • Page 44 AOC LM92SV R902 61L1206105 CHIP 1MOHM 5% 1/4W R903 61L1206624 CHIP 620K 5% 1/4W R904 61L1206624 CHIP 620K 5% 1/4W R905 61L1206204 CHIP 200KOHM 1/4W R906 61L1206204 CHIP 200KOHM 1/4W R907 61L1206204 CHIP 200KOHM 1/4W R908 61L1206204 CHIP 200KOHM 1/4W...
  • Page 45 AOC LM92SV R924 61G 17224152T 240 OHM 5% 1/4W T901 6G 31502 1.5MM RIVET 90G6062 1 HEAT SINK M1G1030 5128 SCREW Q901 57G 724 8 2SK2843(SC) CBPC980KA3ACKP AIC980KA3ACKP MAIN BOARD 40G 457624 1B LABEL-CPU 40G 45762412B CBPC LABEL C103 67G309V470 3...
  • Page 46 AOC LM92SV C254 67G309V220 3 22UF +-20% 16V C256 67G309V479 3 4.7UF +-20% 16V C259 67G309V220 3 22UF +-20% 16V C267 67G309V220 3 22UF +-20% 16V C276 67G305V470 3P 47UF 16V 105 C282 67G215L101 4N GP KY25VB100M-L(6.3*11) C301 67G309V100 3...
  • Page 47 AOC LM92SV C121 65G0603104 12 CER2 0603 X7R 16V 100N C122 65G0603104 12 CER2 0603 X7R 16V 100N C124 65G0603104 12 CER2 0603 X7R 16V 100N C126 65G0603104 12 CER2 0603 X7R 16V 100N C127 65G0603104 12 CER2 0603 X7R 16V 100N...
  • Page 48 AOC LM92SV C183 65G0603104 12 CER2 0603 X7R 16V 100N C188 65G0603104 12 CER2 0603 X7R 16V 100N C189 65G0603104 12 CER2 0603 X7R 16V 100N C202 65G0603221 32 CHIP 220PF 50V NPO C203 65G0603221 32 CHIP 220PF 50V NPO...
  • Page 49 AOC LM92SV C265 65G0603104 12 CER2 0603 X7R 16V 100N C266 65G0603104 12 CER2 0603 X7R 16V 100N C268 65G0603104 12 CER2 0603 X7R 16V 100N C269 65G0603104 12 CER2 0603 X7R 16V 100N C270 65G0603104 12 CER2 0603 X7R 16V 100N...
  • Page 50 AOC LM92SV C414 65G0603104 12 CER2 0603 X7R 16V 100N C415 65G0603104 12 CER2 0603 X7R 16V 100N C416 65G0603104 12 CER2 0603 X7R 16V 100N C417 65G0603104 12 CER2 0603 X7R 16V 100N C418 65G0603104 12 CER2 0603 X7R 16V 100N...
  • Page 51 AOC LM92SV D402 93G 6433P BAV99 D403 93G 6433P BAV99 D404 93L 60220 BAT54C-GS08 D405 93L 60220 BAT54C-GS08 D406 93G 6433P BAV99 D407 93G 6433P BAV99 D408 93G 6433P BAV99 D409 93G 6433P BAV99 D410 93G 6433P BAV99 D411 93G 6433P...
  • Page 52 AOC LM92SV L302 71G 56Z601 CHIP BEAD 600 OHM 0805 L401 61L0603000 RST SM 0603 JUMP MAX 0R L402 61L0603000 RST SM 0603 JUMP MAX 0R L403 61L0603000 RST SM 0603 JUMP MAX 0R L404 71G 59C301 CHIP BEAD 300OHM...
  • Page 53 AOC LM92SV R107 61L0603473 RST SM 0603 RC0603 47K R108 61L0603472 RST SM 0603 RC0603 4K7 R109 61L0603473 RST SM 0603 RC0603 47K R110 61L0603472 RST SM 0603 RC0603 4K7 R111 61L0603000 RST SM 0603 JUMP MAX 0R R112 61L0603000...
  • Page 54 AOC LM92SV R249 61L0603000 RST SM 0603 JUMP MAX 0R R253 61L0603105 RST SM 0603 RC0603 1M P R301 61L0603472 RST SM 0603 RC0603 4K7 R302 61L0603220 RST SM 0603 RC0603 22R R303 61L0603220 RST SM 0603 RC0603 22R R304...
  • Page 55 AOC LM92SV R429 61L0603472 RST SM 0603 RC0603 4K7 R430 61L0603103 RST SM 0603 RC0603 10K R431 61L0603303 CHIP 30K OHM 5% 1/10W R433 61L0603103 RST SM 0603 RC0603 10K R434 61L0603220 RST SM 0603 RC0603 22R R435 61L0603220 RST SM 0603 RC0603 22R...
  • Page 56 AOC LM92SV R473 61L0603471 CHIPR 470 OHM+-5% 1/10W R474 61L0603471 CHIPR 470 OHM+-5% 1/10W R475 61L0603471 CHIPR 470 OHM+-5% 1/10W R476 61L0603471 CHIPR 470 OHM+-5% 1/10W R477 61L0603472 RST SM 0603 RC0603 4K7 R478 61L0603472 RST SM 0603 RC0603 4K7...
  • Page 57 AOC LM92SV U101 56G 585 4 AIC1117-33CY U102 56G 585 4 AIC1117-33CY U103 56G 563 34 AIC 1084-18PM TO-263 U105 56G 585 4 AIC1117-33CY U106 56G 566 6 SI9953DY-T1 U107 56G 563 34 AIC 1084-18PM TO-263 U108 56G 566 6...
  • Page 58 AOC LM92SV C214 63G210J1842A2 PMS 0.18UF 250V C215 65G 3J2206ET 22PF 5% SL 3KV TDK C216 65G 3J2206ET 22PF 5% SL 3KV TDK C217 65G 3J2206ET 22PF 5% SL 3KV TDK C218 65G 3J2206ET 22PF 5% SL 3KV TDK C223 67G215L471 3R LOW E.S.R 470UF +/-20%...
  • Page 59 AOC LM92SV C209 65G0805105 27 CHIP 1UF Y5V 0805 C210 65G0805105 27 CHIP 1UF Y5V 0805 C211 65G0805105 27 CHIP 1UF Y5V 0805 C212 65G0805105 27 CHIP 1UF Y5V 0805 C219 65G0805105 27 CHIP 1UF Y5V 0805 C220 65G0805105 27...
  • Page 60 AOC LM92SV R105 61L0805100 CHIPR 10 OHM+-5% 1/8W R201 61L0603303 CHIP 30K OHM 5% 1/10W R202 61L0603512 CHIP 5.1K OHM 1/10W R203 61L0603512 CHIP 5.1K OHM 1/10W R204 61L0603103 RST SM 0603 RC0603 10K R205 61L0603473 RST SM 0603 RC0603 47K...
  • Page 61 AOC LM92SV PT201 6G 31502 1.5MM RIVET PT202 6G 31502 1.5MM RIVET R104 61G 60210052T 10 OHM 5% 1/6W R224 61G 20720252T 2K OHM 1/2W R225 61G 20720252T 2K OHM 1/2W R226 61G 20720252T 2K OHM 1/2W R227 61G 20720252T...

Table of Contents