Acer AL2051 Service Manual
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Acer AL2051 Service Manual

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Acer AL2051W
Service Guide
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Summary of Contents for Acer AL2051

  • Page 1 Acer AL2051W Service Guide...
  • Page 2 Version Release Date Dec-15-2005 Jan-04-2006 Service Guide Version and Revision Revision History Initial release (Draft Version) Final Version TPV Model TA90KAUHKGAEAP 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 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

    Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Chapter 2 Operating Instructions External Controls Front Panel Controls Adjusting the picture Hot-Key Menu OSD Message...

  • Page 7: Introduction

    Monitor Features Introduction Scope This specification defines the requirements for the 20” MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15 pin D-sub VGA connector and 24 pin DVI connector. It also supports VESA DPMS power management and plug & play function. There is a build-in stereo audio amplifier with OSD control to drive a pair of speakers.

  • Page 8: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time All specifications Fully functional Measuring equipment Control settings User brightness control User contrast control User red/white balance, Green/white balance and Blue/white balance control Power input...

  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification Panel type Display size Display mode Pixel pitch Pixels (H x V) Pixel clock Contrast ratio Brightness Response time (Tr/Tf) Display color Viewing angle Pc interface Signal connector Interface frequency Plug & play Power Input voltage Total output power Weight 20.1 inch-wide Color TFT-LCD Module...

  • Page 10: Lcd Panel Specification

    LCD Panel Specification LCD Panel Model (AU M201EW01) Display Type Resolution Display Dot Display Area Pixel Pitch Display Color 16.7M (true) Lamp Frequency Lamp Current Weight Optical Specifications The optical characteristics are measured under stable conditions at 25℃: active matrix color TFT LCD 1680 x 1050 1680(x3) x 1050 433.44mm(H) x 270.90mm(V)

  • Page 11: Support Timing

    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

    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. Power Board (Include: Inverter and adapter board) AC-IN 100V-240...

  • Page 13: Main Board Diagram

    Main Board Diagram OSD Control KEY PAD W79E632 (U402) EPR_SDA EPR_SCL EEPROM AT24C16AN-10SU-2.7 (U403) Panel connector (CN407) MST9251A-LF-205 (Include: ADC, OSD etc) (U401) H sync V sync DVI Connector D-Sub Connector (CN102) (CN101) DB15_SDA DVI_SDA DB15_SCL DVI_SCL EEPROM EEPROM M24C02-WMN6TP M24C02-WMN6TP (U101) Frame...

  • Page 14: Software Flow Chart

    Software Flow Chart...
  • Page 15 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

    Main Board Layout Label CN603 88G 30211K CN602 88G 30214K CN701 88G 3041CE CN101 88G 35315F H CN102 88G 35424F H X401 93G 22 53 X402 93G 22 55 H U401 56G 562120 U402 56G1125170AC1 Part No. PHONE JACK 5PIN PHONE JACK 5PIN DC JACK 3PIN D-SUB 15PIN...

  • Page 17: Front Bezel

    Front Bezel External Controls Item >/ Volume </ Volume Power Key/Power Indicator Description Item Description MENU/ENTER Auto Adjust Key/Exit...

  • Page 18: Rear Bezel

    Rear Bezel Item D-SUB Cable DC-Jack Power Cable AC Power Cord Description Item Description External Adapter DVI Cable Audio Cable...

  • Page 19: Chapter 2 Operating Instructions

    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. • The power cord should be connected. •...

  • Page 20: Front Panel Controls

    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

    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. Press < or >to change the settings of the current function. 5.
  • Page 22 b. The Description For Control Function...

  • Page 24: Hot-Key Menu

    Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation When the OSD is closed, press Left or Volume Right button will be Volume Hot-Key Function OSD Message a. Outline b. The Description For OSD Message Item Auto Config When Analog signal input, if User Press Hot-Key “Auto”, will show this message, and the Please Wait monitor do the auto config function.

  • Page 25: Logo

    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: Chapter 3 Machine Disassembly

    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 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 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 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. (Fig 9.2) Fig 7 Fig 8 Fig 9.1...
  • Page 30 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 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 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 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

    Troubleshooting This chapter provides troubleshooting information for the AL2051W: 1. Main board No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Measure U703 PIN2=1.8V U705 PIN2=3.3V X401 and X402 oscillate waveforms are normal No power...
  • Page 35 No picture (LED orange) No picture The button if under control Measure U703 PIN2=1.8V U705 PIN2=3.3V X402 oscillate waveform is normal Check HS/VS from CN407 is normal Replace U401 X401oscillate waveform is normal Check reset circuit of U402 is normal Replace U402 Replace U703, U705 Replace X402...
  • Page 36 White screen White screen Measure Q701 base is high level? Check Q701, Q702 is broken or CN407 solder? Check Correspondent component. Replace Panel Note: 1. If Replace “MAIN-BOARD”, Please re-do “DDC-content” programmed & “WHITE-Balance”. 2. If Replace “ PWPC” only, Please re-do “ WHITE-Balance” X401 oscillate waveform is normal Replace X401...
  • Page 37 2. Power Board No power No power Check AC line volt 110V or 220V Check the voltage of C904(+) Check start voltage for the pin3 of IC901 Check the auxiliary voltage is between 10V-16V Check D904, D905,IC902 Check AC line Check F901, bridge rectified circuit Check R903, R904,IC901 Check Q902,Q903...
  • Page 38 3. Inverter Board No backlight     Check L805 =12V       Check ON/OFF signal Check IC801 PIN5=5V+ -0.25V Check IC801 PIN18 triangular wave is normal Check IC801 PIN11, 12,19,20 End no output debug   Check adapter board Check main board Check Q802,Q804,ZD803 circuit Check R821,C821 Check feedback...
  • Page 39 Keypad Board OSD is unstable or not working Is Keypad Board connecting normally Is Button Switch normally Is Keypad Board Normally? Check Main Board Connect Keypad Board Replace Button Switch Replace Keypad Board...

  • Page 40: Chapter 5 Connector Information

    Connector Information The following figure shows the connector locations on the monitor: Pin No. Pin No. TMDS Data2- TMDS Data2+ TMDS Data 2/4 Shield TMDS Data4- TMDS Data4+ DDC Clock DDC Data Analogue Vertical Sync TMDS Data1- TMDS Data1+ TMDS Data 1/3 Shield TMDS Data3- 15 –...

  • Page 41: Chapter 6 Fru (Field Replacement Unit) List

    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. Chapter 6...

  • Page 42: Exploded Diagram

    Exploded Diagram (Model: AL2051W)
  • Page 43 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 SHIELDING PANEL MAIN BOARD POWER BOARD INPC BOARD 85G 732 1 750GLUA1W1211N AICA90KAUAEP ADPC1260AXP INPC2062AUA1P...
  • Page 45 SPEAKERS 78G 322 3B BASE 34G1785 QW B BASE BACK COVER 33G4965AQT 1L HINGE HOLDER 20G 041 1...

  • Page 46: Chapter 7 Schematic Diagram

    FSDATAU[0..31] FSDATAU[0..31] FSDATAU[0..31] /FSWE /FSWE /FSCAS /FSCAS /FSRAS /FSRAS FSBKSEL0 FSBKSEL0 FSBKSEL1 FSBKSEL1 FSCLK+ FSCLK+ FSCLK- FSCLK- FSCKE FSCKE FSDDR[0..11] FSADDR[0..11] FSADDR[0..11] 5.Frame Memory Title 715G1765-1 for AL2051W (acer) Size Document Number Date: Tuesday, January 03, 2006 Sheet Chapter 7...
  • Page 47 2.5V L712 +2.5V_DMC +2.5V_DMC 6 120 OHM C764 C767 C768 47uF/25V 0.1uF 0.1uF L714 +2.5V_DMQ Title 715G1765-1 for AL2051W (acer) +2.5V_DMQ 6 120 OHM Size Document Number C770 POWER 0.1uF Date: Tuesday, January 03, 2006 Sheet VCC12V R707 onBACKLITE 7 C748 0.1uF...
  • Page 48 1/16W 　 R136 1/16W 　 R137 1/16W R138 R139 　 1/16W CLK+ CLK- 　 R140 1/16W Title 715G1765-1 for AL2051W(acer) Size Document Number INPUT Date: Tuesday, January 03, 2006 PC5V D106 BAV70 C116 U101 0.1uF M24C02WMN6 DVI5V D112 BAV70 C118 U102 0.1uF...
  • Page 49 Unloaded trace impedance on this interface is 90 Ohm Loaded trace impedace with DRAM load is 65 Ohm (for 2.5 inch total trace length) C423 0.001uF Title 715G1765-1 for AL2051W (acer) Size Document Number Scaler (MST9251A) Date: Tuesday, January 03, 2006...
  • Page 50 FSDATAU31 RN308 　 1/16W FSDATA20 FSDATAU20 FSDATA21 FSDATAU21 FSDATA22 FSDATAU22 FSDATA23 FSDATAU23 Near The DDR-SDRAM IC Title 715G1765-1 for AL2051W (acer) Size Document Number Date: Tuesday, January 03, 2006 C322 C323 C324 C325 0.1uF 0.1uF 0.1uF 0.1uF FSDATAU[0..31] 5 Frame Memory...
  • Page 51 D408 BAV99 BAV99 BAV99 VCPU SW401 SW402 C440 C439 LCD ONOFF KEY LEFT 0.001uF 0.001uF Title 715G1765-1 for AL2051W (acer) Size Document Number Date: Tuesday, January 03, 2006 DDC_WP 4 Q403 PMBS3904 C445 0.1uF/16V SW403 SW404 SW405 KEY AUTO KEY RIGHT...
  • Page 52 220uF/16V R607 Volume 　 220K 1/16W C613 0.1uF CN601 SPEAKER CONN C603 0.1uF OUT_L C605 220uF/16V OUT_R C607 220uF/16V R603 R604 　 　 1/16W 1/16W Title 715G1765-1 for AL2051W (acer) Size Document Number AUDIO Date: Tuesday, January 03, 2006 Sheet...

  • Page 53: Power/Inverter Board

    Power/Inverter board...
  • Page 54 L805 CN805 200uH C847 C848 R801 0.1uF/0805 0.1uF/0805 2.4K 　 0805 R802 ON/OFF 　 1206 Q802 DTA144WKA L806 200uH Q803 33L8009-6N-H Q804 PMBS3904 DTC144WKA ZD803 R806 5.6V 　 0805 C814 0.1uF/0805 C815 1uF/0805 C813 1uF/25V C816 0.22uF/0805 C818 IC801 1.0uF/0805 R818 　...

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