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25

Machine Disassembly

This chapter contains step-by-step procedures on how to assemble the monitor for maintenance.

Disassembly Procedure

Disassemble the base

1. Remove hinge cover. (Fig 1)

2. Remove four screws to remove stand base. (Fig 2)

Chapter 3

Fig 1

Fig 2

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Summary of Contents for AL1906

Page 1: ...Acer AL1906 Service Guide ...

Page 2: ...1 Service Guide Version and Revision No Version Release Date Revision 1 1 0 Apr 21 2006 Initial release ...

Page 3: ...sed 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 Trademarks Acer is a registered trademark of Acer Incorporated All other trademarks are property of their respective ow...

Page 4: ...erence in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television receptio...

Page 5: ...y purpose of the grounded plug Unplug the unit during a lightning storm or when it will not be used for long periods of time This will protect the monitor from damage due to power surges Do not overload power strips and extension cords Overloading can result in fire or electric shock Never push any object into the slot on the monitor cabinet It could short circuit parts causing a fire or electric ...

Page 6: ...out 15 Front Bezel 16 Rear Bezel 17 Chapter 2 Operating Instructions 18 External Controls 18 Front Panel Controls 19 Adjusting the picture 20 Hot Key Menu 23 OSD Message 23 LOGO 24 Chapter 3 Machine Disassembly 25 Chapter 4 Troubleshooting 32 Chapter 5 Connector Information 37 Chapter 6 FRU Field Replacement Unit List 38 Exploded Diagram 39 Chapter 7 Schematic Diagram 41 Analog 41 TSUM16AK 42 LVDS...

Page 7: ...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 50k hours or more Chart of AL1906 Panel 19 AU M190EN04 S...

Page 8: ...ximum unless otherwise specified User contrast control Typical unless otherwise specified Control settings User red white balance Green white balance and Blue white balance control In the center unless otherwise specified Power input 100Vac or 264Vac Ambient temperature 20 5 Analog input mode 1280 x1024 75 Hz Measurement systems The units of measure stated in this document are listed below 1 gamma...

Page 9: ...mm H 0 294mm V Display dot 1280 x RGB 1024 Pixel clock 135MHz max Contrast ratio 550 1 typ Brightness 270 cd m2 typ Response time Tr Tf 8ms Typ Display color 16 2M 6 bits FRC Viewing angle H 140 V 135 typ Pc interface RGB Analog Interface Signal connector D Sub 15pin Horizontal Frequency 30KHz 80KHz Interface frequency Vertical Frequency 55Hz 75Hz Plug play VESA DDC2B Power Input voltage 47 63HZ 1...

Page 10: ...lor TFT LCD Resolution 1280x1024 pixels Display Dot 1280x RGB x 1024 Display Area 376 32mm H x 301 06mm V Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 2M true Lamp Frequency 50kHz Max Lamp Current 7 0 mArms typ Weight 2700g typ Optical Specifications Measuring Condition Ta 25 C ...

Page 11: ... support modes to accommodate the above mode and other video modes within the frequency range of the monitor 85Hz refresh rate Support Monitor should display 85Hz refresh rate mode as emergency mode Monitor should display Out of Range warning menu at this mode ...

Page 12: ... flat panel control logic brightness control logic and DDC The Inverter board will drive the backlight of panel Video signal DDC Power Board Inverter adapter Board Flat Panel and CCFL backlight Main Board Keyboard RS232 Connector For white balance adjustment in factory mode HOST Computer CCFL Drive AC IN 100V 240V Audio board ...

Page 13: ...12 Main Board Diagram LCD Interface Scalar TSUM16AK Include MCU ADC OSD etc SST25VF010 20 4C SAE OSD Control Interface Keypad D SUB Connector EEPROM 24C02 Crystal 14 318MHZ EEPROM AT24C16N ...

Page 14: ...13 Software Flow Chart 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18 ...

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

Page 16: ...15 Main Board Layout Label Part number Description CN405 88G 35315F H D SUB 15PIN CN101 33G801724B H PIN HEADER 24P 2 0mm U401 56G 562100 TSUM16AK X401 93G 22 53 CRYSTAL 14 318MHzHC 49U ...

Page 17: ...ure can be adjusted to your personal preferences The power cord should be connected Connect the video cable from the monitor to the video card Press the power button to turn on the monitor position The power indicator will light up EXTERNAL CONTROLS FRONT PANEL CONTROL Item Description Item Description 1 Auto Adjust Exit 4 MENU ENTER 2 5 Power Indicator 3 6 Power Button ...

Page 18: ...e of your monitor into a nearby outlet Plug the other end of the power cord into the PC port 2 Connector one end of 15 pin D SUB cable to the back of the monitor and connector the other end to the computer s D DUB port Turn on your monitor and computer Item Description 1 Power Cable 2 Signal Cable ...

Page 19: ...gs the picture can be adjusted to your personal preferences The power cord should be connected Connect the video cable from the monitor to the video card Press the power button to turn on the monitor position The power indicator will light up External Controls Item Description Item Description 1 Auto Adjust Exit 4 MENU ENTER 2 5 Power Indicator 3 6 Power Button Chapter 2 ...

Page 20: ...tton for 2 seconds to activate the Auto Adjustment function The Auto Adjustment function is used to set the HPos VPos Clock and Focus NOTES Do not install the monitor in a location near heat sources such as radiators or air ducts or in a place subject to direct sunlight or excessive dust or mechanical vibration or shock Save the original shipping carton and packing materials as they will come in h...

Page 21: ...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 To exit and save select the exit function If you want to adjust any other function repeat steps 2 4 Analog Only Mode ...

Page 22: ...EPROM User Red Red Gain from Digital register User Green Green Gain Digital register User Blue Blue Gain from Digital register English N A Set OSD display language to English Traditional Chinese N A Set OSD display language to Traditional Chinese Deutsch N A Set OSD display language to German Français N A Set OSD display language to French Español N A Set OSD display language to Spain Italiano N A...

Page 23: ...del Auto Config N A Auto Adjust the H V Position Focus and Clock of picture Information N A Show the resolution H V frequency and input port of current input timing Reset N A Clear each old status of Auto configuration and set the color temperature to Cool Exit N A Exit OSD ...

Page 24: ...en Analog signal input if 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 Analog Only Model When the video cable is not connected will show This message This message will be f...

Page 25: ...ere is no video input signal present When there is no video input signals 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 comp...

Page 26: ... chapter contains step by step procedures on how to assemble the monitor for maintenance Disassembly Procedure Disassemble the base 1 Remove hinge cover Fig 1 2 Remove four screws to remove stand base Fig 2 Chapter 3 Fig 1 Fig 2 ...

Page 27: ...26 Disassemble the front cover and rear bezel 1 Remove nine screws to remove back cover and front bezel Fig 3 2 Remove connector wire with keyboard and main board Fig 4 Fig 3 Fig 4 ...

Page 28: ...27 Disassemble the shield Remove two screws to remove the shield Fig 5 Remove the shield as arrow direction Fig 5 ...

Page 29: ...28 Disassemble the main board 1 Remove three screws to remove main board Fig 6 2 Remove connector wire with main board and panel Fig 7 Fig 6 Fig 7 ...

Page 30: ...29 3 Remove connector wire with main board and power board Fig 8 4 Remove connector wire with main board and KEPC board Fig 9 Fig 8 Fig 9 ...

Page 31: ...30 Disassemble the power board 1 Remove four screws to remove power board Fig 10 2 Remove connector wire with power board and panel Fig 11 Fig 10 Fig 11 ...

Page 32: ...31 Disassemble the panel Remove four screws to remove metal frame Fig 12 Fig 12 ...

Page 33: ...d look if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Measure U701 PIN2 3 3V U702 PIN2 3 3V Reinsert or check the power section X401 oscillate waveforms are normal Measure CN701 PIN5 6 12V Measure CN701 PIN9 10 5V OK OK NG NG NG Replace U401 Replace X401 OK NG Check power section Replace U701 U702 NG ...

Page 34: ...re U701 PIN2 3 3V U702 PIN2 3 3V Replace U701 U702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer or change the cable Replace U401 NG OK ...

Page 35: ...ct Keypad Board Replace Button Switch Replace Keypad Board OK NG NG NG Check CN101 PIN 23 24 should have response from 0V to 5V When we switch the power switch from on to off Replace panel Check the PPWR panel power relative circuit Q706 Q704 In normal operation when LED green R725 Should 5 V If PPWR no response when the power switch Turn on and turn off replace the U401 TSUM16AK OK NG ...

Page 36: ... 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 IC901 T901 Check ZD901 D903 OK Check D910 D911 IC902 OK NG No power NG NG OK NG ...

Page 37: ...nge Q201 or Q202 Check the pin1 of U201 have saw tooth wave NG OK Change U201 Check D201 has the output of square wave at short time NG OK CheckQ205 Q207 Q203 Q201or Q206 Q208 Q204 D202 Check the resonant wave of pin2 pin5 for PT201 PT202 NG Check the output of PT201 PT202 Check Q206 Q207 C211 Check connecter lamp OK NG Change PT201 PT202 OK ...

Page 38: ... board 1 5 6 10 11 15 15 Pin Color Display Signal Cable D sub PIN NO DESCRIPTION PI N NO DESCRIPTION 1 Red 9 5V 2 Green 10 Logic Ground 3 Blue 11 Monitor Ground 4 Monitor Ground 12 DDC Serial Data 5 DDC Return 13 H Sync 6 R Ground 14 V Sync 7 G Ground 15 DDC Serial Clock 8 B Ground Chapter 5 ...

Page 39: ...hatever 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 list provided by your regional Acer office to order FRU parts for repair and service of customer machines NOTE To scrap or...

Page 40: ...39 Exploded Diagram Model AL1906 ...

Page 41: ... picture show the description of the following component Item Picture Description Part No 1 BACK COVER 34G1574 RX B 2 STAND 34G1576 RX B 3 BEZEL 34G1573AQW B 4 BASE 34G1575 RX B 5 SCREW M1L1730 8128 6 SCREW Q1G 340 10128 ...

Page 42: ...6V SOG 4 R444 10K 1 16W R439 75 1 16W D412 MLL5232B 5 6V FB412 0 1 16W HSYNC 4 INPUT A TSUM16AK B 1 5 Monday May 09 2005 Title Size Document Number Rev Date Sheet of R451 10K 1 16W GREEN R452 10K 1 16W C442 33pF FB411 0 1 16W C439 0 1uF BLUE R447 1K 1 16W DDCA_SDA 4 ESD_5V SDA_VGA R448 2 2K 1 16W BLUE R440 75 1 16W C440 0 1uF GNDG 4 R445 100 1 16W C432 0 047uF GREEN C444 0 1uF VSYNC 4 RIN 4 R449 2...

Page 43: ... LED_A KEY_MENU PA18 CN404 CONN 2 4 6 8 10 12 14 1 3 5 7 9 11 13 R417 20K 1 16W C414 0 1uF VCC3 3 VCC3 3 PB17 PB12 FB403 600 OHM VDVI PB19 PB20 R486 NC KEY_AUTO PA16 U402 SST25VF010 20 4C SAE 1 2 3 4 5 6 7 8 CE SDO WP VSS SDI SCK HOLD VDD C428 0 1uF U401 TSUM16AK 59 56 57 54 58 55 53 63 64 51 62 61 70 72 71 73 79 21 108 32 33 109 110 111 112 113 114 118 119 120 121 122 123 124 125 126 127 107 106 ...

Page 44: ... LVB1P GPOO2 12V BG1P PB21 CLKAP PANEL INTERFACE A TSUM16AK B 1 5 Monday May 09 2005 Title Size Document Number Rev Date Sheet of RB1N B1N B2N LVB2P BA2N RA1P 0R BCLKN BB2P RA1N VLCD 2 GA3N NC V OSP GA2P LVA3P GA1N FCLKP 3 3V LVB0M X LVB1M RXO2 PA3 BB1P LVA3M PB 12 23 PB18 0R CPT 17 LVB0M LVACKM PA12 BA1N PA4 PA13 LP PA 14 19 4 NC NC VLCD GB2N LVA3P PA8 LVDS Panel PA17 GA3N R88 BB3N FB2N 0R V RB2P...

Page 45: ...cument Number Rev Date Sheet of D701 1N4148 R33 3V3 VLCD R705 4 7K 1 16W C715 0 1uF R32 R715 NC R726 NC 4K7 D704 SSM12L Vf 0 38V and If 1A So when system power on the system loading is about 400mA 3 3V is about 200mA and 1 8V is about 200mA So D35 changed from 1N4148 or BAT42 to SSM12L schottky diode D C 3V3 5V VCC3 3 H2 TP 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 VCC3 3 4 R706 NC C703 100uF 25V VCC3 3...

Page 46: ... C922 0 001uF 500V IC902 PC123FY2 4P 1 2 4 3 C935 NC 5V F901 FUSE C905 0 0015uF 2KV D924 LL4148 GS08 ON OFF R915 22 1 10W C906 100uF 25V NC R926 NC t NR901 NTCR 1 2 C908 10uF Drv D903 LL4148 GS08 C932 0 47uF 25V F902 0 1 8W D901 FR107 C928 0 1uF CN902 CONN 1 2 3 4 5 6 7 8 ZD902 RLZ5 1B 1 2 C923 1000uF 25V R933 2 4K 1 10W C911 470pF 50V D902 UF4003 NCP1203D60R2G IC901 NCP1203D60R2G 1 3 4 7 2 5 6 8 ...

Page 47: ... 7uF 50V R226 1K 1 4W is power GND R225 1K 1 4W C213 12pF 3KV D209 1N4148 R223 1 8K 1 4W R227 1K 1 4W D203 1N4148 R211 NC Q203 AOU401L 2 1 3 C211 12pF 3KV CN203 CONN 1 2 R206 12K 1 10W Q204 PMBS3904 R207 10K 1 10W Q205 PMBS3906 C205 1uF 25V is signal GND C212 12pF 3KV D206 1N4148 Q206 KTD1691 P C223 0 1uF 25V TP2 HVO 1 R212 62K 1 10W R208 0 1 10W TP1 HVO 1 C206 NC D210 LL4148 GS08 TP4 HVL 1 CN202 ...

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