Acer AL2051 AL2051W Service Guide
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- Acer AL2051 | AL2051W Service Guide - Page 1
Acer AL2051W Service Guide 1 - Acer AL2051 | AL2051W Service Guide - Page 2
No. Version 1 1.0 2 2.0 Service Guide Version and Revision Release Date Dec-15-2005 Jan-04-2006 Revision History Initial release (Draft Version) Final Version TPV Model TA90KAUHKGAEAP TA90KAUDBGAFACP 2 - Acer AL2051 | AL2051W Service Guide - Page 3
, manual or otherwise, without the prior written permission of Acer Incorporated. Disclaimer The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically - Acer AL2051 | AL2051W Service Guide - Page 4
part number change is made, it will not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part 's authority to operate the equipment. 2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the - Acer AL2051 | AL2051W Service Guide - Page 5
and shall be easily accessible. For use only with the attached power adapter (Output 12Vdc), which has UL, CSA listed license. Special Notes On LCD Monitors The following symptoms are normal with LCD monitor and do not indicate a problem. Notes Due to the nature of the fluorescent light, the screen - Acer AL2051 | AL2051W Service Guide - Page 6
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 7 8 9 10 11 12 13 14 16 17 18 Chapter 2 Operating Instructions - Acer AL2051 | AL2051W Service Guide - Page 7
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 - Acer AL2051 | AL2051W Service Guide - Page 8
distance Warm up time All specifications Fully functional Measuring equipment Power input Ambient temperature : Dark room ( - Acer AL2051 | AL2051W Service Guide - Page 9
LCD Monitor General Specification Panel type 20.1 inch-wide Color TFT-LCD Module M201EW01. Display size Display mode Pixel pitch 433.44 (H) x Frequency 30KHz ----91KHz Vertical Frequency 55Hz ------85Hz Plug & play Power Input voltage VESA DDC2B, VESA DPMS 230V 5Ċ, 50 3 Hz Total output - Acer AL2051 | AL2051W Service Guide - Page 10
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 50kHz( - Acer AL2051 | AL2051W Service Guide - Page 11
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. 11 - Acer AL2051 | AL2051W Service Guide - Page 12
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. CCFL Drive. Flat Panel and CCFL backlight Power Board (Include: Inverter and adapter board) Main Board - Acer AL2051 | AL2051W Service Guide - Page 13
Main Board Diagram OSD Control KEY PAD MCU W79E632 (U402) Panel connector (CN407) MST9251A-LF-205 (Include: ADC, OSD etc) (U401) Frame Memory (U303) EPR_SDA EPR_SCL EEPROM AT24C16AN-10SU-2.7 (U403) RXD TXD H sync RGB V sync DVI - Acer AL2051 | AL2051W Service Guide - Page 14
Software Flow Chart 1 Y 2 3 N 4 N 5 Y 6 N 7 8 Y 9 N 10 11 Y N 12 N 13 Y Y N 14 15 16 Y 17 N 18 19 Y 14 - Acer AL2051 | AL2051W Service Guide - Page 15
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. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar - Acer AL2051 | AL2051W Service Guide - Page 16
Main Board Layout 1 Label CN603 CN602 CN701 CN101 CN102 X401 X402 U401 U402 Part No. 88G 30211K 88G 30214K 88G 3041CE 88G 35315F H 88G 35424F H 93G 22 53 93G 22 55 H 56G 562120 56G1125170AC1 Description PHONE JACK 5PIN PHONE - Acer AL2051 | AL2051W Service Guide - Page 17
Front Bezel External Controls Item 1. 2. 3. Description >/ Volume - Acer AL2051 | AL2051W Service Guide - Page 18
Rear Bezel Item 1. 2. 3. Description D-SUB Cable DC-Jack Power Cable AC Power Cord Item 4. 5. 6. Description External Adapter DVI Cable Audio Cable 18 - Acer AL2051 | AL2051W Service Guide - Page 19
Operating Instructions Chapter 2 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. • Connect the - Acer AL2051 | AL2051W Service Guide - Page 20
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/ cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor before cleaning it. 20 - Acer AL2051 | AL2051W Service Guide - Page 21
Adjusting the Picture a. How to Adjust a Setting 1. Press the MENU-button to activate the OSD window. 2. Press 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. To exit and - Acer AL2051 | AL2051W Service Guide - Page 22
b. The Description For Control Function 22 - Acer AL2051 | AL2051W Service Guide - Page 23
23 - Acer AL2051 | AL2051W Service Guide - Page 24
show this message, and the Please Wait monitor do the auto config function. Input Not Supported When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor support range, will show this message. This is no active signal input, will show this message, then enter power saving. 24 - Acer AL2051 | AL2051W Service Guide - Page 25
reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored power cord shall be 125 volts AC. Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of a minimum No. 18 AWG, type - Acer AL2051 | AL2051W Service Guide - Page 26
Machine Disassembly Chapter 3 This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure The back view 26 - Acer AL2051 | AL2051W Service Guide - 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 27 - Acer AL2051 | AL2051W Service Guide - 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 28 - Acer AL2051 | AL2051W Service Guide - 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 29 - Acer AL2051 | AL2051W Service Guide - 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 30 - Acer AL2051 | AL2051W Service Guide - 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 31 - Acer AL2051 | AL2051W Service Guide - 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 32 - Acer AL2051 | AL2051W Service Guide - 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 33 - Acer AL2051 | AL2051W Service Guide - Page 34
This chapter provides troubleshooting information for the AL2051W: 1. Main board No power Chapter 4 No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal OK NG Measure U703 - Acer AL2051 | AL2051W Service Guide - Page 35
No picture (LED orange) No picture The button if under NG X401oscillate NG Replace X401 control waveform is normal OK Measure U703 PIN2=1.8V U705 PIN2=3.3V OK OK Check reset circuit of U402 is normal OK Replace U402 NG Check Correspondent component X402 oscillate waveform is normal OK NG - Acer AL2051 | AL2051W Service Guide - Page 36
OK NG Replace X401 Check reset circuit of U402 is normal Check Correspondent component. NG OK Replace Panel NG Check Correspondent component. OK Replace U402 Note: 1. If Replace "MAIN-BOARD", Please re-do "DDC-content" programmed & "WHITE-Balance". 2. If Replace " PWPC" only, Please re-do - Acer AL2051 | AL2051W Service Guide - Page 37
2. Power Board No power No power Check AC line volt 110V or 220V NG OK Check AC line Check the voltage of C904(+) OK NG Check start voltage for the pin3 - Acer AL2051 | AL2051W Service Guide - Page 38
3. Inverter Board No backlight Check L805 =12V OK NG Check ON/OFF signal OK NG Check IC801 PIN5=5V+ -0.25V OK NG Check IC801 PIN18 triangular wave is normal OK NG Check IC801 PIN11, 12,19,20 OK NG End no output debug Check adapter board Check main board Check Q802,Q804,ZD803 circuit - Acer AL2051 | AL2051W Service Guide - Page 39
Keypad Board OSD is unstable or not working Is Keypad Board connecting normally? Y Is Button Switch normally? N Connect Keypad Board N Replace Button Switch Is Keypad Board Normally? Y Check Main Board N Replace Keypad Board 39 - Acer AL2051 | AL2051W Service Guide - Page 40
Pin No. 9. 10. 11. 12. 13. 14. 15. Description +5V Logic Ground Monitor Ground DDC-Serial Data H-Sync V-Sync DDC-Serial Clock 24 - Pin Color Display Signal Cable . 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. Description TMDS Data3+ +5V Power Ground Hot Plug Detect TMDS Data0TMDS Data0+ TMDS Data - Acer AL2051 | AL2051W Service Guide - Page 41
com.tw/spl/). For whatever reasons a part number change is made, it will not be noted in the printed Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU - Acer AL2051 | AL2051W Service Guide - Page 42
Exploded Diagram (Model: AL2051W) 42 - Acer AL2051 | AL2051W Service Guide - Page 43
Part List Above picture show the description of the following component. Item Picture Description Part No. HINGE COVER-F 33G4967 QW L 1 HINGE COVER-B 33G4968 QT L 2 BEZEL 34G1782AQW B 3 BACK COVER 34G1784 QU B 4 MAIN FRAME 15G8290 1 43 - Acer AL2051 | AL2051W Service Guide - Page 44
5 SHIELDING 85G 732 1 6 PANEL 750GLUA1W1211N 7 MAIN BOARD AICA90KAUAEP 8 POWER BOARD ADPC1260AXP 9 INPC BOARD INPC2062AUA1P 44 - Acer AL2051 | AL2051W Service Guide - Page 45
10 SPEAKERS 78G 322 3B 11 BASE 34G1785 QW B 12 BASE BACK COVER 33G4965AQT 1L 13 HINGE HOLDER 20G 041 1 45 - Acer AL2051 | AL2051W Service Guide - Page 46
Diagram Main Board MST9251A AVDDA AVDD_DVI +APLL VLCD VDDC VDD_MPLL +2.5MVDD +2.5V_DMQ +2.5V_DMC 2.POWER VLCD B2 RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC ] 5.Frame Memory +2.5MVDD +2.5V_DMQ+2.5V_DMC 46 Title 715G1765-1 for AL2051W (acer) Size Document Number Rev B TOP 1 Date: - Acer AL2051 | AL2051W Service Guide - Page 47
5 120 OHM + C760 C762 10uF/50V 0.1uF Remove C94/C95/U13 +3.3DV1=>LCD I/F Pad +3.3DV2=>Host bus 0414 +3.3AVDD for AVDD_DVI pin4,pin10 AVDD_DVI +3.3AVDD +2.5V_DMQ 6 Title Size C Date: 715G1765-1 for AL2051W (acer) Document Number Rev POWER 1 Tuesday, January 03, 2006 Sheet 3 of 8 47 - Acer AL2051 | AL2051W Service Guide - Page 48
- 2 1 13 12 5 DAT4+ DAT4DAT5+ DAT5- 4 21 20 23 clk+ clk- 24 31 32 JACK VCC5V R123 10K` 1/16W 1uF C121 0.1uF C122 0.1uF C123 0.1uF C124 0.1uF C125 0.1uF C126 0.1uF Title 715G1765-1 for AL2051W(acer) Size Document Number Rev B INPUT 1 Date: Tuesday, January 03, 2006 Sheet 4 of - Acer AL2051 | AL2051W Service Guide - Page 49
AD3 VGA INPUT DVI INPUT CONNECTOR for PANEL CN407 U401 +3.3DV1 3 AVDD_PLL VDD_MPLL 3 197 NC 196 VDDC 3 For AOC LCD I/FF/W default set Odd/Even Swap. 4/13/93 MDATA[17] MDATA[18] MDATA[19] MDATA[20] 98 97 96 95 94 MDATA[21] 49 Title 715G1765-1 for AL2051W (acer) Size Document Number Rev C - Acer AL2051 | AL2051W Service Guide - Page 50
FSDATAU20 FSDATAU21 FSDATAU22 FSDATAU23 FSDATAU24 FSDATAU25 FSDATAU26 FSDATAU27 FSDATAU28 FSDATAU29 FSDATAU30 FSDATAU31 Near The DDR-SDRAM IC FSDATAU[0..31] 5 Title 715G1765-1 for AL2051W (acer) Size Document Number Rev B Frame Memory 1 Date: Tuesday, January 03, 2006 Sheet 6 of 8 50 - Acer AL2051 | AL2051W Service Guide - Page 51
X402 20MHz C434 22pF 35 EA/VP 21 X1 20 X2 3 VCC RST 2 10 RESET 1 GND RP402 10K` 1/16W 1 2 R457 R456 R419 R420 R422 R424 POWER ENTER RIGHT LEFT AUTO VCPU 10K` 1/16W 10K` 1/16W LCD ONOFF SW402 KEY LEFT SW403 SW404 KEY AUTO KEY RIGHT SW405 KEY MENU Title 715G1765-1 for AL2051W (acer - Acer AL2051 | AL2051W Service Guide - Page 52
INL INR VOLUME STBY MUTE OUTL 17 OUTR 14 10 SVR VAROUT_R 7 5 VAROUT_L GND 20 GND GND GND GND GND GND C609 + C610 + 1uF 1uF 3 13 18 ` 1/16W OUT_R OUT_L CN601 1 2 3 4 SPEAKER CONN 52 Title 715G1765-1 for AL2051W (acer) Size Document Number Rev A4 AUDIO 1 Date: Tuesday, January 03, - Acer AL2051 | AL2051W Service Guide - Page 53
Power/Inverter board 53 - Acer AL2051 | AL2051W Service Guide - Page 54
OVP 3 ENA 4 SST 5 VDDA 6 GNDA 7 REF 8 RT1 9 FB 10 CMP 20 NDRV_B PDRV_A 19 18 CT RT 17 16 PWRGND LCT 15 DIM 14 13 LPWM PDRV_C 12 R836 N.C R839 82K` 1/4W C842 1uF/0805 NC R840 NC JP801 2 1 is power GND is signal GND AOC (Top Victory) Electronics Co., Ltd. Title INPC2062AUA1P Size Document