Acer AL2051W Service Manual
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Acer AL2051W Service Manual

Acer AL2051W Service Manual

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Acer AL2051W
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  • Page 1 All manuals and user guides at all-guides.com Acer AL2051W Service Guide...
  • Page 2 All manuals and user guides at all-guides.com Service Guide Version and Revision Version Release Date Revision History TPV Model Dec-15-2005 Initial release TA90KAUHKGAEAP (Draft Version) Jan-04-2006 Final Version TA90KAUDBGAFACP...
  • Page 3 Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.
  • Page 4 DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
  • Page 5 All manuals and user guides at all-guides.com Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.

  • Page 6: Table Of Contents

    All manuals and user guides at all-guides.com Table Of Contents Chapter 1 Monitor Features ……………………………………… Introduction ……………………………………… Electrical Requirements ……………………………………… LCD Monitor General Specification ……………………………………… LCD Panel Specification ……………………………………… Support Timing ……………………………………… Block Diagram ……………………………………… Main Board Diagram ……………………………………… Software Flow chart ………………………………………...

  • Page 7: Introduction

    This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more. Chart of AL2051W 20” AUO M201EW01 V.2 Panel...

  • Page 8: Electrical Requirements

    All manuals and user guides at all-guides.com Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Dark room (<1cd/m2) Ambient light 40 cm for LCD performance, 20 cm for LCD failures Viewing distance Warm up time ＞30 minutes All specifications...

  • Page 9: Lcd Monitor General Specification

    All manuals and user guides at all-guides.com LCD Monitor General Specification Panel type 20.1 inch-wide Color TFT-LCD Module M201EW01. Display size 433.44 (H) x 270.90(V) VGA : 640 × 480 (60/72/75/85 Hz) Display mode SVGA : 800 × 600 (56/60/72/75/85 Hz) XGA : 1024 ×...

  • Page 10: Lcd Panel Specification

    All manuals and user guides at all-guides.com LCD Panel Specification LCD Panel Model (AU M201EW01) Display Type active matrix color TFT LCD Resolution 1680 x 1050 Display Dot 1680(x3) x 1050 Display Area 433.44mm(H) x 270.90mm(V) Pixel Pitch 0.258mm(H) x 0.258mm(V) Display Color 16.7M (true) Lamp Frequency...

  • Page 11: Support Timing

    All manuals and user guides at all-guides.com Supported Timing Support Modes There will be 20 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor.

  • Page 12: Block Diagram

    All manuals and user guides at all-guides.com Monitor Block Diagram The LCD monitor will contain a main board, a power board, which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel. Flat Panel and CCFL Drive.

  • Page 13: Main Board Diagram

    All manuals and user guides at all-guides.com Main Board Diagram Panel connector (CN407) OSD Control KEY PAD MST9251A-LF-205 Frame (Include: ADC, OSD etc) Memory W79E632 (U401) (U402) (U303) EPR_SDA H sync DVI Video Signal EPR_SCL V sync EEPROM DVI Connector D-Sub Connector AT24C16AN-10SU-2.7 (CN102)

  • Page 14: Software Flow Chart

    All manuals and user guides at all-guides.com Software Flow Chart...
  • Page 15 All manuals and user guides at all-guides.com Remark: 1) MCU initializes. 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: Main Board Layout

    All manuals and user guides at all-guides.com Main Board Layout Label Part No. Description CN603 88G 30211K PHONE JACK 5PIN CN602 88G 30214K PHONE JACK 5PIN CN701 88G 3041CE DC JACK 3PIN CN101 88G 35315F H D-SUB 15PIN CN102 88G 35424F H DVI CONNECTOR 24PIN X401 93G 22 53...

  • Page 17: Front Bezel

    All manuals and user guides at all-guides.com Front Bezel External Controls Item Description Item Description >/ Volume MENU/ENTER </ Volume Auto Adjust Key/Exit Power Key/Power Indicator...

  • Page 18: Rear Bezel

    All manuals and user guides at all-guides.com Rear Bezel Item Description Item Description D-SUB Cable External Adapter DC-Jack Power Cable DVI Cable AC Power Cord Audio Cable...

  • Page 19: Operating Instructions

    All manuals and user guides at all-guides.com Chapter 2 Operating 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 20: Front Panel Controls

    All manuals and user guides at all-guides.com Front Panel Control • Power Button: Press this button to turn the monitor ON or OFF, and display the monitor’s state. • Menu / Enter: Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Volume Adjust OSD status.

  • Page 21: Adjusting The Picture

    All manuals and user guides at all-guides.com Adjusting the Picture a. How to Adjust a Setting 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. 4.
  • Page 22 All manuals and user guides at all-guides.com b. The Description For Control Function...
  • Page 23 All manuals and user guides at all-guides.com...

  • Page 24: Hot-Key Menu

    All manuals and user guides at all-guides.com Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation Icon Description When the OSD is closed, press Left or Volume of Audio adjustment. The Audio will be Volume Right button will be Volume Hot-Key Mute when volume=0 Function OSD Message...

  • Page 25: Logo

    All manuals and user guides at all-guides.com Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.

  • Page 26: Machine Disassembly

    All manuals and user guides at all-guides.com Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure The back view...
  • Page 27 All manuals and user guides at all-guides.com 1. Remove two screws. (Fig 1) 2. Remove the hinge cover. (Fig 2) 3. Remove the one screw. (Fig 3) Fig 1 Fig 2 Fig 3...
  • Page 28 All manuals and user guides at all-guides.com 4. Firstly, find out the two hooks position. (Fig 4) 5. Then, pry the rear cover up as arrowhead direction. (Fig 5) 6. Remove the six screws. ( Fig 6) Fig 4 Fig 5 Fig 6...
  • Page 29 All manuals and user guides at all-guides.com 7. Disconnect the wire harnesses of main board and panel, main board and power board. (Fig 7) 8. Remove four screws. (Fig 8) 9. Pry the main frame on the left to remove bezel. (Fig 9.1) Pry the main frame on the right to remove bezel.
  • Page 30 All manuals and user guides at all-guides.com Fig 9.2 10. Remove the screws for frame on the left. (Fig 10.1) Remove the screws for frame on the right. (Fig 10.2) Fig 10.1 Fig 10.2...
  • Page 31 All manuals and user guides at all-guides.com 11. Disconnect the wire harness for power board and lamps. (Fig 11) 12. Remove the four screws to remove the main board. (Fig 12) 13. Remove the eight screws to remove BKT base. (Fig 13) Fig 11 Fig 12 Fig 13...
  • Page 32 All manuals and user guides at all-guides.com 14. Remove the two screws to loose the copper manganese wire. (Fig 14) 15. Remove the four screws and disconnect the wire harness. (Fig 15) 16. Remove the four screws. (Fig 16) Fig 14 Fig 15 Fig 16...
  • Page 33 All manuals and user guides at all-guides.com 17. Turn the six clips anticlockwise to remove the shielding. (Fig 17) 18. Disconnect the wire harness of main board and panel. (Fig 18) The end!! Fig 17 Fig 18...

  • Page 34: Troubleshooting

    All manuals and user guides at all-guides.com Chapter 4 Troubleshooting This chapter provides troubleshooting information for the AL2051W: 1. Main board No power No power Press power key and look if the picture is normal Please reinsert and make sure...
  • Page 35 All manuals and user guides at all-guides.com No picture (LED orange) No picture The button if under X401oscillate Replace X401 control waveform is normal Check Correspondent Check reset circuit of component U402 is normal Measure U703 PIN2=1.8V U705 PIN2=3.3V Replace U402 X402 oscillate waveform is normal Replace U703, U705...
  • Page 36 All manuals and user guides at all-guides.com White screen White screen Measure Q701 base X401 oscillate waveform is normal is high level? Replace X401 Check Q701, Q702 is Check reset circuit of broken or CN407 solder? U402 is normal Check Correspondent Check Correspondent component.
  • Page 37 All manuals and user guides at all-guides.com 2. Power Board No power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C904(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901 Check R903, R904,IC901 Check the auxiliary voltage is between 10V-16V Check Q902,Q903...
  • Page 38 All manuals and user guides at all-guides.com 3. Inverter Board No backlight     Check L805 =12V         Check adapter board Check ON/OFF signal Check main board Check IC801 PIN5=5V+ -0.25V Check Q802,Q804,ZD803 circuit Check IC801 PIN18 triangular wave is normal Check R821,C821 Check IC801 PIN11, 12,19,20 Check feedback...
  • Page 39 All manuals and user guides at all-guides.com Keypad Board OSD is unstable or not working Is Keypad Board connecting normally Connect Keypad Board Is Button Switch normally Replace Button Switch Is Keypad Board Normally? Replace Keypad Board Check Main Board...

  • Page 40: Connector Information

    All manuals and user guides at all-guides.com Chapter 5 Connector Information The following figure shows the connector locations on the monitor: 15 – Pin Color Display Signal Cable (D-sub) Pin No. Description Pin No. Description Green Logic Ground Blue Monitor Ground Monitor Ground DDC-Serial Data DDC-Return...

  • Page 41: Fru (Field Replacement Unit) List

    FRU parts for repair and service of customer machines. NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.

  • Page 42: Exploded Diagram

    All manuals and user guides at all-guides.com Exploded Diagram (Model: AL2051W)
  • Page 43 All manuals and user guides at all-guides.com Part List Above picture show the description of the following component. Item Picture Description Part No. HINGE COVER-F 33G4967 QW L HINGE COVER-B 33G4968 QT L BEZEL 34G1782AQW B BACK COVER 34G1784 QU B MAIN FRAME 15G8290 1...
  • Page 44 All manuals and user guides at all-guides.com SHIELDING 85G 732 1 PANEL 750GLUA1W1211N MAIN BOARD AICA90KAUAEP POWER BOARD ADPC1260AXP INPC BOARD INPC2062AUA1P...
  • Page 45 All manuals and user guides at all-guides.com SPEAKERS 78G 322 3B BASE 34G1785 QW B BASE BACK COVER 33G4965AQT 1L HINGE HOLDER 20G 041 1...

  • Page 46: Schematic Diagram

    All manuals and user guides at all-guides.com Schematic Diagram Main Board MST9251A SCHEMA GNDR GNDR GNDG GNDG DDC_CLK DDC_DAT DDC_WP GNDB GNDB ST_DET1 HSYNC HSYNC ST_DET2 VSYNC VSYNC VDD_MPLL VLCD VLCD VDD_MPLL CLK+ CLK+ VDDC CLK- CLK- +APLL AVDD_DVI AVDDA 3.INPUT AVDD_PLL AVDDPLL2...
  • Page 47 All manuals and user guides at all-guides.com VCC5V VCC1 VCC5V L701A1 R702 L701 C710綼　U701 U701 22uH 　 1/16W VCPU FB701 600 OHM D704 D705 VCPU C710 SBM84PT SBM84PT C773 1uF/25V C706 C707 C708 C709 　 1000pF R709 4.7K 1/16W 0805 0805 220uF/16V 220uF/16V...
  • Page 48 All manuals and user guides at all-guides.com DB15 　 　 FB101 1/16W R102 1/16W C102 0.047uF 　 　 FB102 1/16W R103 1/16W C103 0.047uF 　 　 FB103 1/16W R104 1/16W C104 0.047uF 　 R105 1/16W C105 0.001uF PC5V R101 C101 C106 C107 VGA_CON...
  • Page 49 All manuals and user guides at all-guides.com +3.3DV1 AVDD_PLL AVDD_PLL AVDDPLL2 VDD_MPLL +APLL For AOC LCD I/F- VDD_MPLL +3.3DV1 AVDDPLL2 3 +3.3DV2 +APLL F/W default set Odd/Even Swa AVDD_DVI +3.3DV2 4/13/93 +2.5MVDD VDDC AVDD_DVI +2.5MVDD VDDC AVDDA AVDDA U401 TXA0- LVB0M RX2+ TXA0+...
  • Page 50 All manuals and user guides at all-guides.com +2.5V_DMQ +2.5V_DMC C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C313 C314 C315 C317 C318 22uF/50V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 22uF/50V 0.1uF...
  • Page 51 All manuals and user guides at all-guides.com VCPU VCPU RP401 R464 C431 RP402 　 1/16W 　 1/16W 0.1uF 　 1/16W U402 C432 22pF X402 EA/VP P1.0 P1.1 P1.2 C433 20MHz P1.3 10uF/16V VCPU P1.4 P1.5 U404 MAX810STR C434 22pF P1.6 P1.7 RESET P2.0...
  • Page 52 All manuals and user guides at all-guides.com VCC12V_AUDIO VCC12V_AUDIO C603 C601 C602 0.1uF 220uF/16V 220uF/16V U601 TDA7496L CN602 　 R601 18K 1/16W C604 0.47uF/16V OUTL R602 C606 0.47uF/16V OUTR 　 1/16W VOLUME AUDIO_SD STBY VAROUT_R PHONEJACK AUDIO_MU MUTE VAROUT_L R603 C608 C609 C610...

  • Page 53: Power/Inverter Board

    All manuals and user guides at all-guides.com Power/Inverter board...
  • Page 54 All manuals and user guides at all-guides.com C801 33pF D801 SB240 L805 C802 33pF CN805 200uH 470uF/25V C803 FSI4502 C806 C804 33pF Q801 4.7uF/1206 X5R C847 C848 R801 　 0.1uF/0805 0.1uF/0805 2.4K 0805 R802 ZD801 C805 ON/OFF 　 1206 5.6V 104/0805 Q802 R804...

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