Acer AL1921 Service Manual Download

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Acer AL1921

Service Guide

Service guide files and updates are available

on the CSD web; for more information,

please refer to

http://csd.acer.com.tw

Summary of Contents for AL1921

Page 1: ...Acer AL1921 Service Guide Service guide files and updates are available on the CSD web for more information please refer to http csd acer com tw ...

Page 2: ...ect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose 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...

Page 3: ... bits and pieces of additional information related to the current topic WARNING Alerts you to any damage that might result from doing or not doing specific actions CAUTION Gives precautionary measures to avoid possible hardware or software problems IMPORTANT Reminds you to do specific actions relevant to the accomplishment of procedures ...

Page 4: ... NOT be covered in this generic service guide In such cases please contact your regional offices or the responsible personnel channel to provide you with further technical details 2 Please note WHEN ORDERING FRU PARTS that you should check the most up to date information available on your regional web or channel If for whatever reason a part number change is made it will not be noted in the printe...

Page 5: ...eiving antenna 2 Increase the separation between the equipment and receiver 3 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected 4 Consult the dealer or an experienced radio TV technician for help Notice 1 The changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the e...

Page 6: ...our home consult your dealer or local power company zThe monitor is equipped with a three pronged grounded plug a plug with a third grounding pin This plug will fit only into a grounded power outlet as a safety feature If your outlet does not accommodate the three wire plug have an electrician install the correct outlet or use an adapter to ground the appliance safely Do not defeat the safety purp...

Page 7: ...ay find slightly uneven brightness on the screen depending on the desktop pattern you use The LCD screen has effective pixels of 99 99 or more It may include blemishes of 0 01 or less such as a missing pixel or a pixel lit all of the time Due to the nature of the LCD screen an afterimage of the previous screen may remain after switching the image when the same image is displayed for hours In this ...

Page 8: ...23 Rear Bezel 24 Chapter 2 Operating Instructions 25 External Controls 25 Front Panel Controls 25 OSD Menu 27 Hot Key Menu 30 OSD Message 30 LOGO 31 Update the firmware 32 Chapter 3 Machine Disassembly 43 Chapter 4 Troubleshooting 45 Chapter 5 Connector Information 51 Chapter 6 FRU Field Replacement Unit List 52 Exploded Diagram 52 Chapter 7 Schematic Diagram 54 Analog and Digital Input 54 MST8131...

Page 9: ...ock 165MHz 165MHz Max Resolution 1280 x 1024 75Hz 1280 x 1024 75Hz Plug Play VESA DDC1 2BTM VESA DDC1 2BTM ON Mode 60W 60W EPA ENERGY STAR OFF Mode 5W 5W D Sub 15pin D Sub 15pin Input Connector DVI D 24pin DVI D 24pin Input Video Signal Analog 0 7Vp p standard 75 OHM Positive Digital DVI D Analog 0 7Vp p standard 75 OHM Positive Digital DVI D Display Size Horizontal 376 32mm Vertical 301 056mm Hor...

Page 10: ...Warm Color Cool Color RGB Color temperature Reset OSD timeout information Exit Contrast Brightness Focus Clock H Position V Position Input Selected Language Warm Color Cool Color RGB Color temperature Reset OSD timeout information Exit Power Consumption Maximum 60 60 Watts Audio Output Rated Power 2 5W rms Per channel Rated Power 2 5W rms Per channel Regulatory Compliance CSA TÜV GS CE TCO 99 UL C...

Page 11: ...htness control Maximum unless otherwise specified User contrast control Typical unless otherwise specified User red white balance Green white balance and Blue white balance control In the center unless otherwise specified Power input 90Vac or 240Vac Ambient temperature 20 5 C Analog input mode 1280 x1024 75 Hz Measurement systems The units of measure stated in this document are listed below 1 gamm...

Page 12: ...lor 16 7M RGB 8 bit Data Viewing angle AU EN02 L R 85 85 160 degrees horizontal typical U D 75 75 140 degrees vertical typical Luminance uniformity 80 typical Pc interface 1 Video RGB analog 0 7V peak to peak Sync TTL positive or negative Signal connector 15 pin Mini D type standard VGA video 3 5 mm stereo audio jack Audio For AR577 only Audio power 1 5Wrms 0 5Wrms 300Hz 1 3kHz Front control power...

Page 13: ...s Ta 25 2 C VDD 5V FV 60Hz FDCLK 54MHz ITEM Symbol Condition MIN TYP MAX UNIT Contrast Ratio Center of screen CR 400 500 Rising TR 15 20 Response Time at Ta Falling TF 10 15 msec Luminance of white Center of screen YL 220 250 cd mm RX 0 634 Red RY 0 354 GX 0 304 Green GY 0 581 BX 0 143 Blue BY 0 102 WX 0 310 Color Chromaticity CIE White WY θ 0 φ 0 Normal Viewing Angle TYP 0 03 0 330 TYP 0 03 θL 80...

Page 14: ...requency range is generalized by supported timing If the entered mode does not match the supported timing the display optimization will not be assured Horizontal Frequency 30KHz 83KHz Vertical Frequency 55Hz 75Hz Panel bright dot defect and dark dot defect Test conditions 1280 1024 64KHz 60Hz R G B Full White and Full Black Pattern RECALL 1 Bright Dots R G or B dots 3dots G dots 3dots 2 Adjacent d...

Page 15: ...48 4 60 0 1344 806 136 24 160 60 0 56 5 70 1 1328 806 136 24 144 70 0 1024x768 XGA 60 75 1312 800 96 16 176 75 0 63 98 60 02 1688 1066 112 48 248 108 1280x1024 SXGA 79 98 75 03 1688 1066 144 16 248 135 Factory Preset Timing Table STANDARD RESOLUTION HORIZONTAL FREQUENCY kHz VERTICAL FREQUENCY Hz 720 x 400 31 47 70 0 640 480 31 47 60 0 640 480 35 00 66 6 640 480 37 50 75 0 VGA 640 480 37 861 72 8 8...

Page 16: ...nel control logic brightness control logic and DDC The Inverter board will drive the backlight of panel and the DC DC conversion The Adapter will provides the 12V DC power to inverter power board Monitor Block Diagram KEY BOARD SPEAKER SPEAKER PWPC LAMP LCD PANEL AUDIO ANALOG IN LCD Controller Scaler OSD LVDS IC ADC DC DC MCU AUDIO IN POWER 90V 264V ...

Page 17: ...KEY Control AT24C16 U602 EPR SDA SCL Panel PA 0 9 PB 0 9 VLCD U401 MST 8131B HS VS VAA3 VCC2 5V VCC3 3V VAA1 VAA4 VAA2 AT24C02 DDC U301 DDC SCL SDA VGA Input VGA R G B VGA Hsync Vsync MAIN BOARD DIAGRAM AT24C02 DDC U302 DVI Signal ...

Page 18: ...set it to green color Scalar initializes 10 In standby mode 11 Update the lifetime of back light 12 Check the analog and digital port are there any signals coming 13 Does the scalar send out a interrupt request 14 Wake up the scalar 15 Are there any signals coming from analog or digital port 16 Display No Input Signal message And go into standby mode after the message disappear 17 Program the scal...

Page 19: ...18 Monitor Board Layout ...

Page 20: ...02 WMN6T SMT U401 MST8131B PQFP 12 U602 AT24C16N 10SC 2 7 U603 MAX810STR SOT 23 U601 W78E65P 40 X401 CRYSTAL 14 318MHzHC 49US X601 20MHZ CN201 WAFER 2 6P 2 0MM R A CN601 PIN HEADER 2 7P 2 0mm CN602 WAFER 16PIN 2 0mm DIP CN503 PIN HEADER 24P 2 0mm CN301 88L 35315F HS CN302 DVID CONN 24P ...

Page 21: ...front bezel and back cover shall be within specification Top and Bottom Left and Right Back cover Bezel concavity Back cover Bezel concavity 0 8mm A 1 3 mm 0 8mm A 1 3 mm Back Cover Hinge Cover concavity 0mm B 0 5mm Base Neck concavity 0mm C 0 6mm ...

Page 22: ...zel step Back cover Bezel step 0mm D 0 8 mm 0mm D 0 8 mm LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1 0mm The distance of the LCD display unit from left side to right should not large than 4 0mm ...

Page 23: ... 15 2 down 5 2 Plastic Material For TCO99 Front Bezel ABS 94HB Back Cover ABS 94HB The Others ABS 94HB For MPRII Front Bezel ABS 94HB Back Cover ABS 94HB The Others ABS 94HB GAP Spec Gap between panel with bezel is 0 mm gap 1 2 mm ...

Page 24: ...23 Front Bezel Item Description 1 VEDIO UP 2 VEDIO DOWM 3 POWER 4 MENU ENTER 5 AUTO EXIT ...

Page 25: ...24 Rear Bezel Item Description 1 D SUB Cable 2 DVI CABLE 3 AUDIO CABLE 4 AC POWER CORD ...

Page 26: ...ols 1 Volume 4 MENU ENTER 2 Volume 5 Auto Adjust Key Exit 3 Power Key LED Front Panel Control Power Button Press this button to turn the monitor ON or OFF 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 Volume Activates the volume control when the OSD is OFF or navigate through adjustment icon...

Page 27: ...er have to ship your monitor For maximum protection repackage your monitor as it was originally packed at the factory To keep the monitor looking new periodically clean it with a soft cloth Stubborn stains may be removed with a cloth lightly dampened with a mild detergent solution Never use strong solvents such as thinner benzene or abrasive cleaners since these will damage the cabinet As a safety...

Page 28: ...27 Adjusting The Picture 1 Main OSD Menu a Outline I Analog Only Model II Dual Input Model Analog Signal Input III Dual Input Model Digital Signal Input ...

Page 29: ...A User Red Red Gain from Digital register 0 100 User Green Green Gain Digital register 0 100 User Blue Blue Gain from Digital register 0 100 The Color Temperature will be set to Cool The User R G B value default is 100 will not be Modified by Reset function English N A Set OSD display language to English N A 繁體中文 N A Set OSD display language to Tranditional Chinese N A Deutsch N A Set OSD display ...

Page 30: ...ignal from analog D Sub N A N A Dual Input Model Digital N A Select input signal from digital DVI N A N A Information N A Show the resolution H V frequency and input port of current iput timing N A N A Reset N A Clear each old status of Auto configuration and set the color temperature to Cool N A N A Exit N A Exit OSD N A N A ...

Page 31: ... Digital signal input without this OSD Message Input Not Supported When the Hsync Frequency Vsync Frequency or Resolution is out of the monitor support range will show this message This message will be flying Cable Not Connected 1 Analog Only Model When the video cable is not connected will show this message This message will be flying 2 Dual Input Model Dual Input Model without this OSD Message N...

Page 32: ...gency EPA and The Swedish Confederation Employees NUTEK This feature is designed to conserve electrical energy by reducing power consumption when there is no video input signal present When there is no video input signal this monitor following a time out period will automatically switch to an OFF mode This reduces the monitor s internal power supply consumption After the video input signal is rest...

Page 33: ... to use VDE 0602 0625 0821 approval power cord in European counties Update the firmware 1 Tools a ISP Kit Prepared by CMO picture 1 b RS232 Comport Cable picture 2 c D sub Cable d Adapter No 1 kit No 2 kit 2 Install kit as below Step1 Get a Kit ...

Page 34: ...33 Step2 join RS232 Monitor cable and Adapter Step3 When the LED turns Green It will start running Connect to PC Connect to adapter Connect to monitor Connect to chroma ...

Page 35: ...date the firmware please power on the monitor in this time please push your finger to control the keyswitch left right insert and draw the DC power the interface will appear ISP mode Step1 Open the ISP tool And Select the MCU type ...

Page 36: ...35 Step2 Select Bank where is the new firmware ...

Page 37: ...36 Step3 Choose the File Format a when you already choose the New firmware a small pane appear File Format please choose the inte he no Binary and following choose the OK ...

Page 38: ...37 Step4 Select the communication Setting Port Name the Port the same your PC COM ...

Page 39: ...38 Step5 Click the ConNect button ...

Page 40: ...39 Step6 Before Executing ISP the interface change as below Click Program All button that will execute erase and program ...

Page 41: ...40 Step7 ISP is processing ...

Page 42: ...41 Step8 Then you can get the window as follow and Program ok ...

Page 43: ...42 Step9 Click verify button that will execute verify action Then you can get the window as follow and click ok After update the program of APROM must remove the Reboot Mode condition ...

Page 44: ...main frame on the panel 3 give the panel to lock the Screws 4 To fix the power board on the main frame with screws 1 To fix the audio board together with power board 6 To connect the main board with audio board and LVD cable 7 To fix the main board with screws 8 To put the bezel on level place 9 To cover the panel with front bezel 10 To fix the shield on the main frame with screws 11 To put and fi...

Page 45: ...ith the corresponding components to avoid mismatch when putting back the components 2 Note The monitor surface is susceptible to scratching Therefore lay the monitor on a soft surface when mounting or removing the base 3 Wear gloves Warning 1 In order to prevent the static disturbance wear resisting static ring 2 No watch ...

Page 46: ...the screen show Cable Not Connected the Signal cable again Check LED status Led Green Replace U601 MCU No nothing is show Connected the Signal cable again Check LED status Check Power switch is in Power on status and check if Power switch had been stuck Led Orange OK Keyboard no stuck Led orange Check the Wire Harness from CN301 Measured RGB R136 R138 R140 H V Input at U601 pin 4 10 was there have...

Page 47: ...the U203 MST8131B OK R308 have response NG no Voltage Measured the Q302 pin 5 6 7 8 5 V Check U202 pin 1 2 3 4 5V OK OK Replace Q302 Nmos SI9933 NG Check the Bklt On relative circuit R409 In normal operation when LED green R409 Bklt On should 5 v If Bklt On no response when the power switch turn on off Replace U203 MST8131B NG still no screen Replace Power board to new one and Check the screen is ...

Page 48: ... to input signal 640x480 60 Hz 31k and LED is Green NG no transition OK Replace MST8131B U401 or replace MAINBOARD Check U203 MST8131B Signal output ER0 7 EG0 7 EB0 7 OR0 7 OG0 7 OB0 7 Is the waveform ok If MainBoard being replace please do the DDC content Replace U301 U302 LVDS IC or replace MAINBOARD OK OK heck U301 U302 LVDS IC Signal output ...

Page 49: ...hange F901 check BD901 Q903 IC901 Check the voltage of C905 Check bridge rectified circuit cFailure NG OK Check start voltage for the pin3 of IC901 Change IC901 NG Repeating the start voltage Check the auxiliary voltage is smaller than 20V 1 Check IC902 IC903 2 Check Q901 Q902 OVP circuit NG OK Check R919 D910 D911 D912 D913 ZD904 OK ...

Page 50: ...C905 NG OK Change Q201 or Q202 Check the pin1 of U201 have sawtooth wave NG Change U201 Check D201 D202 have the output of square wave at short time NG OK Check Q205 Q207 Q203 D201 or Q206 Q208 Q204 D202 Check the resonant wave of pin2 pin5 for PT201 PT202 NG OK Check the output of PT201 PT202 Check Q209 Q210 C213 or Q211 Q212 C214 Check connecter lamp OK NG Change PT201or PT202 OK ...

Page 51: ...yPad Board OSD is unstable or not working Is KeyPad Board ti ll Connect KeyPad Board Is Button Switch normally Replace Button Switch Y N N Is KeyPad Board Normally Replace KeyPad Board Y N Y Check Main Board ...

Page 52: ...nc 7 G Ground 15 DDC Serial Clock 8 B Ground 24 Pin Color Display Signal Cable DVI Pin Meaning Pin Meaning 1 TMDS Data2 13 not connected 2 TMDS Data2 14 5V Power 3 TMDS Data 2 4 Shield 15 Ground 4 not connected 16 Hot Plug Detect 5 not connected 17 TMDS Data0 6 DDC Clock 18 TMDS Data0 7 DDC Data 19 TMDS Data 0 5 Shield 8 Analogue Vertical Sync 20 not connected 9 TMDS Data1 21 not connected 10 TMDS...

Page 53: ...art number change is made it will not be noted on 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 list provided by your regional Acer office to order FRU parts for repair and service of customer machines Note To scrap or to return the defe...

Page 54: ...Description Part No 1 HOLDER CABLE W33L4633 GD X 2 ARM 20L003 1 3 SCREW M1L 330 6120 4 SCREW Q1L 130 6120 5 FOOT PORON 12L 394 3 6 BASE 34L1337 GD B 7 BASE PLATE 15L8022 1 8 HINGE 37L 498 1 9 SHIELD 85L 666 1 10 MAIN FRAME 15L8021 1 11 Key pad 33L4634 AI L 12 REAR COVER 34L1336 AGD 2B ...

Page 55: ...W R308 10K 1 16W MST8131B C608 0 001uF K_AUTO Q602 PMBS3906 3 2 1 R623 0 1 16W onBACKLITE 2 OUT_L U603 MAX810STR NC 1 2 3 GND RST VCC LED_GRN K_RIGHT EAR_L C605 0 1uF onPANEL_5V 3 3V 2 RIGHT OUT_R U601 W78E65P 40 35 21 20 10 14 15 16 17 2 3 4 5 6 7 8 9 43 42 41 40 39 38 37 36 24 25 26 27 28 29 30 31 19 18 32 33 13 11 22 44 12 EA VP XTAL1 XTAL2 RESET INT0 P3 2 INT1 P3 3 T0 P3 4 T1 P3 5 P1 0 P1 1 P1...

Page 56: ...uF PA6 GA2 VAA2 2 CLK 3 BB0 RIN 3 C402 22pF PA 0 9 VDPLL C407 0 1uF VDD VAD GB2 RB 0 5 5 VCC3 3 PB 0 9 R 3 NC R401 PB3 RB3 LVD S RB3N BA2P LVA1M RXO0 NC GB1N 12V RB1P GPOO4 PB 0 9 4 FG2N LVBCKP PA4 NC GB5 VLCD 2 GB2P BB0 LVA3M NC B0N RB2N LVB0M PB6 GA2N C511 0 1uF OSP LVB1P NC GA3P RB0 CPT 15 GA 0 3 4 CLKBN LVB0P PA1 LVBCKP PB0 NC RA1P RB3 LVB3M 0R VLCD RA2P GA2N GA2P FR1P HMS PB6 GA3 NC NC BR0N C...

Page 57: ...2 60 R431 NC C407 150pF 5V LED_ORG C422 68pF 5V C410 0 1uF 16V NEW ADD CIRCUIT FOR 4 LED 04 08 C417 NC 2003 02 21 GND R408 NC FB403 600 OHM Q403 NC 3 1 2 GND VOL 4LED MUTE LED_ORANGE P 4 FB405 600 OHM C411 150uF 25V NEW ADD CIRCUIT FOR 4 LED 04 08 GPIO6 P 4 MUTE_OUT LED_GRN R418 NC JP403 R421 0 LED_BLUE C406 NC GND 3 3V BackLight On Off C412 0 1uF 16V R401 0 1 16W R407 NC GPIO7 P 4 R426 NC C413 22...

Page 58: ... 1uF VCC5V R206 10K 1 16W VCC3 3 VCC12V GND VAA4 4 VLCD_12V VCC12V R205 4 7K 1 16W VAA2 R216 4 7K 1 16W GND C215 47uF 16V VCC2 5 4 C202 220uF 25V R219 10K 1 16W D202 GS1D D201 SS14 GND C210 0 1uF Q207 PMBS3904 3 2 1 VLCD R207 4 7K 1 16W VAA4 R218 4 7K 1 16W VCC12V R213 10K 1 16W C204 220uF 25V Q202 PMBS3904 3 2 1 VAA3 4 POWER A MST8XXXB for AOC B 2 7 星期三十二月 03 2003 Title Size Document Number Rev ...

Page 59: ... can download information on all of Acer s Notebook Desktop Server models including Service guides User s manuals Training materials Bios updates Spare parts lists TABs Technical Announcement Bulletin For these purposes we have included an Acrobat File to facilitate the problem free downloading of technical material Also contained on this website are Detailed information on Acer s International Tr...

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