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MONITOR BLOCK DIAGRAM

The LCD monitor will contain an main board, an inverter/ power board, key board and internal adapter which house the

flat panel control logic, brightness control logic and DDC.

The inverter board will drive the backlight of panel and the DC-DC conversion.

The Adapter will provide thr 12V DC-power to inverter/ power board.

Power board

(include: AC/DC,inverter)

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Summary of Contents for AL1914

Page 1: ... 1 Acer AL1914 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 of its dealer assumes the entire cost of all necessary servicing repair and any...

Page 3: ...ing To better fit local market requirements and enhance product competitiveness your regional office MAY have decided to extend the functionality of a machine e g add on card modem or extra memory capability These LOCALIZED FEATURES will 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 t...

Page 4: ...ed to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving 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 Warning Use only shielded signal cables ...

Page 5: ...ur home consult your dealer or local power company z The 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 6: ...ay find slightly uneven brightness in the screen depending on the desktop pattern you use z 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 z 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 t...

Page 7: ... SPECIFICATION 39 SAFETY 41 Chapter 2 Operating Instruction 43 CONTROLS 43 MAIN OSD MENU 44 OSD MESSAGE 46 PLUG AND PLAY 48 WHITE COLOR TEMPERATURE 49 AUDIO TECHNICAL SPECIFICATION 49 SPEAKERS 50 Chapter 3 Machine Disassembly and Replacement 51 DISASSEMBLY PROCEDURE 51 Chapter 4 Troubleshooting 54 TROUBLESHOOTING 54 Chapter 5 Connector Information 58 CONNECTOR INFORMATION 58 Chapter 6 FRU List 59 ...

Page 8: ...ir of speakers Description The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no radiation 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 20k hours or more Comparison ...

Page 9: ... equivalent directly Connected to the monitor under test Minolta CA100 photometer or equivalent Control settings User brightness 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 110Vac or 230Vac Ambient temperature 20 5 C ...

Page 10: ...60 70 72 75 Hz XGA 1024 768 60 70 75 Hz SXGA 1280 1024 60 70 75 Hz standard resolution Pixel pitch 0 294mm H 0 294mm V Display Dot 1280 x RGB 1024 Pixel Clock 25 2 135 0MHz Contrast ratio θ 0 LG 500 1 typical Samsung 700 1 typical AU 550 1 typical Brightness LG 250 typical Samsung 300 typical AU 270 typical Response time Tr Tf LG Ta 25 C 2 10ms typical Samsung Ta 25 C 1 7 6 3ms typical AU Ta 25 C ...

Page 11: ... 11 AU L R 70 70 U D 75 60 Luminance Uniformity LG 1 3 max Samsung 25 max AU 70 min LG Samsung ...

Page 12: ... 12 ...

Page 13: ...l T M D S Signal connector 15 pin Mini D type standard VGA video 24 pin DVI D 3 5 mm stereo audio jack Audio Audio power 0 5Wrms 0 5Wrms 300Hz 10kHz S P L 10 dB Front control power on off with LED select adjustment Interface frequency Horizontal Frequency 24KHz 80KHz Vertical Frequency 49Hz 75Hz ...

Page 14: ...t max LCD Panel Specification LCD Panel Model LG Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x RGB x 1024 Display Area 376 32mm H x 301 056mm V Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 2M Lamp Voltage 715 Vrms typ Lamp Current 6 5 mArms typ Weight 2500g Max Optical Specifications ...

Page 15: ...y Area 376 32mm H x 301 056mm V Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 7M Lamp Voltage 650 Vrms typ Lamp Current 7 0 mArms typ Weight 2250g Max Optical Specifications LCD Panel Model AU Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x RGB x 1024 Display Area 376 32mm H x 301 056mm V ...

Page 16: ... 16 Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 2M RGB 6bit data FRC data Lamp Voltage 700 Vrms typ Lamp Current 7 0 mArms typ Weight 2700g Max Optical Specifications ...

Page 17: ... 17 Panel Relative Humidity LG Samsung ...

Page 18: ...gnal separate horizontal and vertical sync or composite sync which are TTL compatible Polarity positive and negative Interface frequency The following frequency 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 24KHz 80KHz Vertical Frequency 49Hz 75Hz ...

Page 19: ...00 31 469 900 720 108 18 54 28 322 VGA 400 TEXT 70 087 449 400 2 12 35 832x624 49 725 1152 832 64 32 224 57 2832 APPLE MAC 800 74 55 667 624 3 1 39 800x600 35 156 1024 800 72 24 128 36 SVGA 56 25 625 600 2 1 22 800x600 37 879 1056 800 128 40 88 40 VESA 600 60Hz 60 317 628 600 4 1 23 800x600 48 077 1040 800 120 56 64 50 VESA 600 72Hz 72 188 666 600 6 37 23 800x600 46 875 1056 800 80 16 160 49 5 VES...

Page 20: ... 1280x960 75 00 1800 1280 112 96 312 135 00 75Hz 75 00 1000 960 3 1 36 1280x1024 64 1688 1280 112 48 248 108 VESA 1024 60Hz 60 1066 1024 3 1 38 1280x1024 80 1688 1280 144 16 248 135 VESA 1024 75Hz 75 1066 1024 3 1 38 Note Mode 640x350 640x400 and 720x400 will locate on middle position but cannot be expanded to full screen on vertical direction ...

Page 21: ...resh rate mode as emergency mode Monitor should display Out of Range warning menu at this mode Video input Connector Analog Video input Connector 15pins mini D Sub Table 2 4 5 Pin assignment for D sub connector PIN NO Separate Sync 1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 5V DDC 10 CABLE DETECTION 11 GROUND 12 SDA 13 H SYNC 14 V SYNC...

Page 22: ...X2 10 TX1 18 TX0 3 Shield TX2 TX4 11 Shield TX1 TX3 19 Shield TX0 TX5 4 NC 12 NC 20 NC 5 NC 13 NC 21 NC 6 DDC Serial Clock 14 5V power 22 Shield TXC 7 DDC Serial Data 15 Ground 5V 23 TXC 8 No Connect 16 Hot plug detect 24 TXC In case the power of the PC unit is switched off and the power of the monitor is switched on no voltage may occur at pin 14 Color of plastic parts Blue PC99 ...

Page 23: ...board key board and internal adapter which house the flat panel control logic brightness control logic and DDC The inverter board will drive the backlight of panel and the DC DC conversion The Adapter will provide thr 12V DC power to inverter power board Power board include AC DC inverter ...

Page 24: ... 24 BLOCK DIAGRAM System Block Diagram 1 ...

Page 25: ... 25 2 ...

Page 26: ... 26 3 ...

Page 27: ...24LC21A CN1 D SVB 15 PIN U2 24LC21A CN2 DVI D 24 PIN U3 TSU56AJ or TSU16AJ CN3 E T 96113 0803 U4 MX10E8050IAQC CN5 P TWO AFN300 N2G1Z 30P U5 MAX810 CN6 E T 4500 10 U6 24LC16B CN7 E T 4500 03 U7 APM4461 CN8 E T 96113 1103 U8 APL1085 33CE U9 APL1117 1 8V U10 LM4838 ...

Page 28: ...L Component U3 SN74LVC14 CN1 D SVB 15 PIN U4 NT68F633 CN3 E T 96113 0803 U5 24LC16B CN9 E T 4500 10 U6 NT68521 CN301 E T 96113 1103 U10 APL1085 33CE CN302 E T 4500 03 U13 APL1117 2 5 J1 P TWO AFN300 N2G1Z U14 SI9435 U501 LM4838 ...

Page 29: ... 29 Software flow chart ...

Page 30: ...ging these settings the picture can be adjusted to your personal preferences z The power cord should be connected z Connect the video cable from the monitor to the video card z Press the power button to turn on the monitor position The power indicator will light up External Controls 1 Auto Adjust Key Exit 4 MENU ENTER 2 Volume 5 LED 3 Volume 6 Power Key ...

Page 31: ... your PC z Make sure connections are secure Connecting the AC Power z Connect the power cord to the LCD Monitor z Connect the power cord to an AC power source Connecting the Audio Cable For AL1914 z Connect the audio cable to the LINE OUT jack on your PC s audio card or to the front panel s AUDIO OUT jack of your CD ROM drive z Connect the other end of the audio cable to the LCD Monitor s AUDIO IN...

Page 32: ...een 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 ...

Page 33: ... 33 Base Neck concavity 0mm C 0 6mm Top and Bottom Left and Right Back cover Bezel step Back cover Bezel step 0mm D 0 8 mm 0mm D 0 8 mm ...

Page 34: ... 34 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 35: ...up 15 2 down 5 2 Plastic Material For TCO99 Front Bezel PC ABS Back Cover PC ABS The Others ABS 94HB For MPRII Front Bezel ABS 94V 0 Back Cover ABS 94V 0 The Others ABS 94HB GAP Spec Gap between panel with bezel is 0 mm gap 1 2 mm ...

Page 36: ... brightness adjustment Burst mode Protection function auto recovery type Interface Signals Input 1 AC Inlet HUAJIE SA 4S 066 or compatible 2 J701 SC SCJ 0345 1 X 9 3 6D BLU 3P or compatible Output Connector Pin Assignment 1 The connecter was pitch 2 0mm cable length was 125mm PIN NO Function Function 1 5Vaudio Audio power optional 2 GND Audio ground 3 GND Ground 4 GND Ground 5 Vbri Brightness cont...

Page 37: ... specification Input Specification No Item Condition Min Typ Max Unit 1 Input Voltage 100 240 Vac 2 Input Frequency 47 63 Hz 3 Input Current 1 0 Arms Cold Start Vin 100Vrms 30 A0 P 4 Inrush Current Cold Start Vin 240Vrms 50 A0 P 5 Hold Up Time full load 100Vac input 10 ms 6 Turn on time Vin 110Vac 1 0 S 7 Efficiency Full load 70 8 Consumption Vin 240Vac no load 1 W ...

Page 38: ...ith a 10uf Ecap 0 1uf Ceramic cap 2 Band width is limited within 20MHz 3 5Vdc 150mVp p 15Vinv 450mVp p Dynamic Load Regulation 50 100 or 100 50 load change of any DC output 50 duty of 1MHz min 5 Over Under Shoot Power line on off 5 5Vdc load regulation test the 15Vinv loading at 2 0A 15Vinv load regulation test the 5Vdc loading at 1 5A Protection function 1 SCP Short circuit protection must be act...

Page 39: ...nt Each connector Vbri 0 4V 3 3V 3 0 6 5 7 0 mA Frequency 40 70 KHz Lamp start voltage 0 1400 Vrms Striking Time 1 S Lamp Current Balance 0 3 mA Efficiency Vin 15V 80 Operating Life Time 50000 Hr For Samsung Condition Min Typ Max Unit Input Voltage 15 V Input Current 1 5 A ON 3 3 V Backlight ON OFF Control OFF 0 V Brightness Adjust Min Luminance Max Luminance 30 Output Voltage Vin 15V Iout 7 5mA 6...

Page 40: ...t ON OFF Control OFF 0 V Brightness Adjust Min Luminance Max Luminance 30 Output Voltage Vin 15V Iout 7 0mA 700 860 Vrms Brightness lamp current in 7 0mA 215 270 Cd m Output Current Each connector Vbri 0 4V 3 3V 3 0 7 0 7 5 mA Frequency 40 50 60 KHz Lamp start voltage 0 1800 Vrms Striking Time 1 S Lamp Current Balance 0 3 mA Efficiency Vin 15V 80 Operating Life Time 40000 50000 Hr The open lamp vo...

Page 41: ... 41 SAFETY Leakage Current 0 25mA 100Vac Insulation Resistance more than 3M ohms while withstanding a voltage of 500Vac Hi Pot 3Kvac with using 3mA cut off current ...

Page 42: ...ED 5S Switch off 3 W Dark LED SYNC On means Normal operation SYNC Off means H sync F 10KHz duty cycle 25 V sync F 10Hz duty cycle 25 CONNECTORS CONTROLS Connectors Power Monitor rear side AC Inlet Analog RGB Monitor rear side Data Cable 15 pin D sub female male Pin Assignment of 15 pin D sub 1 Red Video 9 5V FOR DDC 2 Green Video 10 Detect 3 Blue Video 11 Serial Data for ISP 4 Serial Clock for ISP...

Page 43: ...st increase Function select Adjust decrease Function select 5 Auto adjustment Buttons Note 1 Press button 4 plus or minus at the same time can activate Volume Adjustment 2 When OSD Menu is off press button 5 auto at the same time can activate Auto Adjustment immediately 3 When into Factory mode press 4 plus minus and 1 power together 2 seconds at same time 5 When into Burning mode press 5 menus 1 ...

Page 44: ...0 100 Do Auto Config Clock Adjust picture Clock to reduce Vertical Line noise 0 100 Do Auto Config H Position Adjust the horizontal position of the picture 0 100 Do Auto Config V Position Adjust the verticalposition of the picture 0 100 Do Auto Config Warm N A Recall Warm Color Temperature from EEPROM N A Cool N A Recall Cool Color Temperature from EEPROM N A The Color Temperature will be set to C...

Page 45: ...display language to Japanese N A The Language will be set to English H Position Adjust the horizontal position of the OSD 0 100 50 V Position Adjust the verticalposition of the OSD 0 100 50 OSD Timeout Adjust the OSD timeout 10 120 10 Auto Config N A Auto Adjust the H V Position Focus and Clock of picture N A N A N A Source Change Analog and Digital source change option N A N A Information N A Sho...

Page 46: ...ge Item Description Auto Config Please Wait When User Press Hot Key Auto will show this message and the 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 message will be flying Cable Not Connected When the video cable is not connected will show this message This message will...

Page 47: ...ess and Contrast value to Max 2 Auto Balance Adjust each R G B contrast gain and offset Method of auto adjust is depends on hardware Adjusted value of R G B gain shall be used for initial value of Contrast in user menu All value shall be adjustable manually This function shall be located in 3 tag of Factory menu 3 Factory color temp data edit Following data for color temp shall be editable manuall...

Page 48: ...sent 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 restored full power is restored and the display is automatically redrawn The appearance is similar to a Screen Saver feature except the display is completely off The display is restore...

Page 49: ... 03 0 198 0 469 u v 0 01 User TCO 0X A 2 6 1 requirement User should follow Microsoft Windows Color Quality Specification for Liquid Crystal Display OEM s http www microsoft com hwdev tech color ColorTest asp Audio Technical specification General Description Output power 1W 1W maximum Total harmonic distortion Less than 1 except speakers distortion Input signal sensitivity 0 5 Vrms for full output...

Page 50: ...ms 300Hz 20KH z 10dB 10d B Volume Max load 4 Ω Signal to Noise ratio 500m Vrms 1KHz 40dB Volume Max load 4 Ω Total harmonic distortion 500m Vrms 1KHz 1 except speakers distortion Cross talk 500m Vrms 1KHz 30dB Volume Max load 4 Ω Output Watt 500m Vrms 1KHz 0 5W Volume Max load 4 Ω Volume Control Analog Speakers Maximum power 2 W per speaker max Impedance 4 ohm 15 1kHz 1 0Hz Frequency response rang...

Page 51: ...hinge 3 Remove the base Disassemble the chassis 1 Remove the four screws to release the back cover 2 Remove the two screws to release the EMI cover from chassis 3 Remove the two screws from VGA connector 4 Then take the chassis 5 Remove the two screws from bezel 6 To separate the chassis and bezel 7 Remove the four screws from chassis and release the panel ...

Page 52: ...e three screws from Chassis and release the main board Disassemble the power board 1 Disassemble two voltage lines from power board 2 Remove the one screw to release line from Chassis 3 Remove the three screws from Chassis 4 Remove the two screws to release power board from Chassis 5 Then take the power board from the chassia Disassemble the key board 1 Remove the one screw to release VK board fro...

Page 53: ...53 Disassemble the speakers 1 Remove the two screws to release line and VK board from bezel 2 Remove the two screws to release line and chassis from bezel 3 Remove the four screws from bezel ...

Page 54: ...54 Chapter 4 Troubleshooting Main Procedure ...

Page 55: ...55 Power Circuit and Backlights Troubleshooting ...

Page 56: ...56 Performance Troubleshooting ...

Page 57: ...57 Function Troubleshooting ...

Page 58: ...nnector Analog Video input Connector 15pins mini D Sub Table 2 4 5 Pin assignment for D sub connector PIN NO Separate Sync 1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 5V DDC 10 CABLE DETECTION 11 GROUND 12 SDA 13 H SYNC 14 V SYNC 15 10 5 1 6 11 15 SCL J1 PHONEJACK STEREO 1 2 3 ...

Page 59: ...om tw spl For whatever reasons a part number change is made it will not be noted in the printed Service Guide For ACER AUTHORIZED CERVICE PROVIDERS your Acer office may have a DIFFERENT part number code to 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 repair and service of customer machines NOTE To...

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Page 62: ...art list No Photo Part Name Part No 1 Hinge Cover FAAR7721000 2 Base Assy FAAR9913A00 3 Rear Cover FAAR9912000 4 Base FAAR9913000 6 Neck FAAR7713000 7 Main Shield ECAR9914A00 8 MB DA2R877V01A Or DA2R577V012 ...

Page 63: ...sung 453AAP300A1 10 Inverter Board LG AU 453AAP300B1 Samsung 453AAP300A1 11 Front Bezel FAAR9911A00 12 Keyboard to MB Cable DCO20162300 13 Speaker R CG10021V900 14 Speaker L CG19921V910 15 Frame ECAR9915A00 16 LCD R AC6VG190000 AC6VA1901P0 AC6VT1901R5 ...

Page 64: ...64 17 Panel to MB cable NBX30001040 NBX30001330 18 Function Board 454AAPE0001 ...

Page 65: ...65 Chapter 7 Schematic Diagram ...

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