Acer AL1923 Service Manual Download | Manualshive

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Trouble Shooting

1. No Power

No Power

Check CN7

+12V and +5V

NO

Change

Power Board

No

Yes

Check Short Of

Main Board

Check U13=1.8V

U12=3.3V

NO

Change

U13,U12

Yes

NO

Change X1 or

U4

Check

X1=14.318MHz

Yes

NO

Change U7 or

U4

Check U7 Pin

1,2,5,6 Clock

Change U7

Yes

RUN Software

ISP

Check Key

Board

Yes

NO

Change Key

Board

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Summary of Contents for AL1923

Page 1: ... 1 Acer AL1923 Dual Service Guide Service guide files and updates are available on the CSD web for more information Please refer to http csd acer com tw 100 Recycled Paper ...

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: ... 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 not 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 printed ...

Page 5: ...ceiving 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 ...

Page 6: ...any l 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 purpose of the grounded plug l Unplug the unit duri...

Page 7: ...ay find slightly uneven brightness in the screen depending on the desktop pattern you use l 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 l 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 8: ...NITOR FEATURE 9 Chapter 2 OPERATING INSTRUTION 19 Chapter 3 MACHINE ASSEMBLY 24 Chapter 4 TROUBLE SHOOTING 36 Chapter 5 CONNECTOR INFORMATION 39 Chapter 6 FRU LIST 41 Chapter 7 SCHEMATIC DIAGRAM 42 Chapter 8 POWER BOARD INFORMATION 48 ...

Page 9: ... m2 typ AUO 8ms 270cd m2 typ Samsung 8ms 300 cd m2 typ CPT 8ms 250 cd m2 typ HSD 12ms 250 cd m2 typ Contrast Ratio 700 1 AU M190EN04 V5 8ms 550 1 LG LM190E03 TLB1 TLB4 8ms 700 1 Samsung TLM190EX L01 8ms 700 1 CPT CLAA10EA05 8ms 600 1 HSD HSD190ME13 A02 8ms LCD Panel Response time AU V5 8ms LG TLB1 TLB4 8ms Samsung 8 ms CPT 8ms HSD 8 ms Video R G B Analog Input Separate Sync H V TTL H Frequency 31 ...

Page 10: ...r Source 90 264 Vac 47 63HZ Environmental Considerations Operating Temp 5 to 40 degree Storage Temp 20 to 60 degree Operating Humidity 10 to 85 Weight N W TBD Dimension TBD Switch Power Switch MENU EXIT Volume Volume AUTO ENTER External Controls Contrast brightness Focus Clock H Position W Position Language OSD Color temperature OSD Position Timeout Auto Config Input Information Reset Exit Regulat...

Page 11: ...dots 2 116 64 dots 0 762 24 dots f v 70Hz 70 087 60Hz 59 940 66 7 HZ 66 667 72 809Hz V Total ms 14 27 449 lines 16 683 525 lines 15 000 525 lines 13 735 520 lines V Sync ms 0 064 2 lines 0 064 2 lines 0 086 3 lines 0 079 3 lines V B P ms 1 112 35 lines 1 049 33 lines 1 114 39 lines 0 739 28 lines V Active ms 12 71 400 lines 15 253 480 lines 13 714 480 lines 12 678 480 lines V F P ms 0 384 12 lines...

Page 12: ...832 x 624 1024 x 768 1024 x 768 Dot clock MHz 50 57 283 65 75 f h 48 077kHz 49 72kHz 48 363kHz 56 48kHz H Total us 20 80 1040dots 20 11 1152 dots 20 677 1344 dots 17 71 1328 dots H Sync us 2 400 120 dots 1 12 64 dots 2 092 136 dots 1 81 136 dots H B P us 1 280 64 dots 3 91 224 dots 2 462 160 dots 1 92 144 dots H Active us 16 00 800 dots 14 52 832 dots 15 754 1024 dots 13 65 1024 dots H F P us 1 12...

Page 13: ...ots H F P us 0 20 16 dots 0 444 48 dots 0 119 16 dots 0 593 64 dots f v 75 03Hz 60 020Hz 75 025 Hz 75 06 Hz V Total ms 13 33 800 lines 16 661 1066 lines 13 329 1066 lines 13 333 900 lines V Sync ms 0 05 3 lines 0 047 3 lines 0 038 3 lines 0 044 3 lines V B P ms 0 47 28 lines 0 594 38 lines 0 475 38 lines 0 474 32 lines V Active ms 12 80 768 lines 16 005 1024 lines 12 804 1024 lines 12 800 864 line...

Page 14: ... 14 Monitor Block Diagram ...

Page 15: ......

Page 16: ......

Page 17: ...to view OSD Press again to exit a selection in OSD 3 UP PLUS If OSD is active press to select or adjust OSD options If OSD is inactive press once then press the buttons marked or to adjust the volume 4 DOWN MINUS If OSD is active press to select or adjust OSD options If OSD is inactive press once then press the buttons marked or to adjust the volume 5 AUTO If OSD is active press to enter a selecti...

Page 18: ...ool Bluish white User You can adjust the colors red green and blue to the intensity you desire Focus This removes any horizontal distortion and makes the picture clear and sharp Clock If there are any vertical stripes seen on the background of the screen this renders them less noticeable by minimizing their size It also changes the size of the horizontal screen H Position This adjusts the horizont...

Page 19: ...This shows brief information on the screen Setting Language Select the OSD menu language from English French German Italian Spanish Simplified Chinese Traditional Chinese Japanese and Russian OSD H Position OSD V Position OSD Time out This changes the position of the OSD window on the screen and staying time ...

Page 20: ...ities 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 The communication channel is defined in two levels DDC2B The DDC2B is a bi directional data channel based on the I2 C protocol The host can request EDID information over the DDC2B channel Sy...

Page 21: ...stored and the display is automatically redrawn The appearance is similar to a Screen Saver feature except the display is completely off The display is restored by pressing a key on the keyboard or clicking the mouse USING THE RIGHT POWER CORD The accessory power cord for the Northern American region is the wallet plug with NEMA 5 15 style and is UL listed and CSA labeled The voltage rating for th...

Page 22: ...OTE 1 The screws for the different components vary in size During the disassembly process group the screws with the corresponding 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 Front View unit mm ...

Page 23: ... 25 Real View Top View ...

Page 24: ... 26 Side View unit mm Exploded view ...

Page 25: ......

Page 26: ...ND LCD CABLE THEN INSERT LCD CABLE IN M B CONNECTOR 2 GET BUTTON CABLE THEN INSERT IT INTO M B CONNECTOR 1 GET POWER B AND INSERT JUMPER IN THE APPOINTED PLACE OF JP10 AT 2 GET AGGLUTINANT TO CONNECT THE JUMPER AND POWER B 3 MARK DOT IN THE PANE MARK OF POWER B AS PICTURE SHOWS 5 1 Jumper value set as 7 5mA ...

Page 27: ...ASSEMBLE THEM IN PCB SHIELD 1 FASTEN 1 PCS SCREW M 4 8 B IN P B 2 FASTEN 2 PCS SCREW M 3 6 T IN P B 3 FASTEN 2 PCS SCREW M 3 6 T IN M B 1 FETCH POWER B MYLAR PUT IT ON SHIELD AND FASTEN 1 PCS SCREW M 3 6 T 2 FASTEN 1 PCS SCREW M 3 6 T IN M B 3 GET THE SHIELD AT FRONTAGE OF THE CONVEYER 2 1 ...

Page 28: ...E CONVEYER 2 GET PANEL AND PUT IT ON THE CONVEYER THEN TEAR OFF THE INCOMING TAPE 1 UNCOVER PANEL PROTECTIVE FILM AND INSPECT IF PANEL IS DIRTY OR SCRATCHED 2 PASTE TYPE ON THE PROTECTIVE FILM TO FASTEN IT 3 TURN LCD TEAR OFF INCOMING TYPE ...

Page 29: ...EL CODE 2 GET LEFT BKT AND LOCK 2 PCS SCREW M3 5 I TO FASTEN IT AND PANEL 1 GET RIGHT BKT AND LOCK 2 PCS SCREW M3 5 I TO FASTEN IT AND PANEL 2 TURN LCD AND TEAR OFF PROTECTIVE FILM 1 GET BEZEL AND CHECK ITS APPEARANCE 2 ASSEMBLE BEZEL ON PANEL THEN PASTE TYPE TO FASTEN PROTECTIVE FILM ON THE BEZEL 3 TURN LCD 1 2 ...

Page 30: ...FASTEN BKT AND BEZEL IN THE RIGHT SIDE WITH SCREW 3 PCS 1 SCAN S N AND M B CODE 2 FASTEN BKT AND BEZEL IN THE LEFT SIDE WITH SCREW 3 PCS 3 TURN LCD 1 FETCH BUTTON B AND INSERT IT INTO BEZEL 2 STICK 1 PCS RUBBER AT THE APPOINTED PLACE ...

Page 31: ...TOR 3 STICK 1 PCS YELLOW TAPE TO FASTEN LCD CABLE 4 TRIM WIRES AND ASSEMBLE SHIELDING IN RIGHT POSITION 1 LOCK 4 PCS SCREW M3 6 T TO FASTEN PCB SHIELD 1 INSERT BUTTON CABLE INTO BUTTON 2 PUT THE SPEAKER AT THE APPOINTED PLACE 3 INSERT NETHER CCFT CABLE IN INVERTER CABLE ...

Page 32: ...FASTEN 2 PCS IO NUT IN THE M B JOINT 3 INSERT CCFT CABLE IN POWER B 1 STICK AL FOIL AT THE APPOINTED PLACE TO FASTEN THE CABLE 2 STICK 2 PCS AL FOIL AT THE APPOINTED PLACE 1 STICK 1 PCS AL FOIL AT THE APPOINTED PLACE 2 STICK 2 PCS AL FOIL AT CCFT ...

Page 33: ...LE LCD COVER TO BEZEL 3 STICK 1 PCS TAPE AT THE APPOINTED PLACE 1 FETCH TRAVEL CARD TEAR OFF 1 PCS APPOINTED S N FROM TRAVEL CARD AND PASTE IT ON THE COVER 2 LOCK 2 PCS SCREW F3 8 B TO FASTEN BEZEL AND LCD COVER 3 GET STAND NECK AND INSPECT IF IT IS DIRTY AND SCRATCHED THEN PUT IT IN THE CONVEYER ...

Page 34: ...D NECK 1 INSERT VGA CABLE INTO VGA CONNECTOR AND INSERT POWER CORD INTO POWER CONNECTOR 2 GET BASE FIXTRUE AND ASSEMBLE IT TO STAND NECK 1 INSERT DVI CABLE INTO DVI CONNECTOR AND INSERT POWER CORD INTO POWER CONNECTOR 2 STAND UP THE MONITOR AND STICK TRAVALCARD AT LEFT DOWNSIDE OF MONITOR Chapter 4 ...

Page 35: ...NO Change Power Board No Yes Check Short Of Main Board Check U13 1 8V U12 3 3V NO Change U13 U12 Yes NO Change X1 or U4 Check X1 14 318MHz Yes NO Change U7 or U4 Check U7 Pin 1 2 5 6 Clock Change U7 Yes RUN Software ISP Check Key Board Yes NO Change Key Board ...

Page 36: ...ing Color Check VGA or DVI Cable NO Change Cable Yes Check R9 R11 R12 Change R9 R11 R12 U4 NO Yes NO Check CN5 LVDS Signal Change U4 or CN5 Cable or Panel Yes NO Yes Change Panel Adjustment R G B Color Check OSD R G B Gain ...

Page 37: ... 38 ...

Page 38: ...ptacle The PIN assignment of the 15 pin mini D SUB connector cable is as follows PI MNEM SIGNAL 1 RV Red Video 2 GV Green Video 3 BV Blue Video 4 NC None 5 GND Ground DDC return 6 RG Red GND 7 GG Green GND 8 BG Blue GND 9 5V 5V for DDC 10 SG Sync GND 11 NC None 12 SDA DDC Data 13 HS Horizontal Sync 14 VS Vertical Sync 15 SCL DDC Clock ...

Page 39: ... NC 2 TMDS data2 14 5V 3 TMDS data2 shield 15 Ground return for 5 V and H V sync 4 NC 16 Hot plug detect 5 NC 17 TMDS data0 6 DDC clock 18 TMDS data0 7 DDC data 19 TMDS data0 shield 8 Not connected 20 NC 9 TMDS data1 21 NC 10 TMDS data1 22 TMDS clock shield 11 TMDS data1 shield 23 TMDS clock 12 NC 24 TMDS clock ...

Page 40: ...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...

Page 41: ... 42 Chapter 7 SCHEMATIC DIAGRAM Main Board Circuit ...

Page 42: ... 43 ...

Page 43: ... 44 ...

Page 44: ... 45 ...

Page 45: ... 46 ...

Page 46: ... 47 ...

Page 47: ...e lamp current value is 6 5mA the jumper should be done as the picture left shows When the lamp current value is 7 0mA the jumper should be done as the picture left shows When the lamp current value is 7 5mA the jumper should be done as the picture left shows ...

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