22" Acer Monitor Predicament

Discussion in 'General Electronics Chat' started by R!f@@, Apr 28, 2010.

  1. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    Hi guys.
    Here is another fancy problem. :)
    Below you see the inside of a 22" Acer Monitor, this thing has been sitting around for a year or so as most of em had given up on it.

    [​IMG]

    Once I saw the PSU it's obvious why it is out of their league for every one here.
    see for ur self.


    [​IMG]


    [​IMG]

    The FET blew taking with it most of the parts of the PWM and the current sensors.

    Just like to ask can anyone make out the value of the resistors.
    The photos are not too good as it is taken in low lite with an i phone.
    But you can see same way as I can see the components. what I mean is the photo shows the details as I too cannot make out the values.
     
    Last edited: Apr 29, 2010
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    No photo was attached.
     
  3. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    Can't you see the pics
     
  4. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    No, no pictures are in your post.
     
  5. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    I see them fine. Rifaa, if you put them in your private album, only "friends" can see them.
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    They show up fine. And they define the real meaning of "crispy critter".
     
  7. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    what's that?:confused:
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Long chain of associations involving a breakfast cereal and then persons hit with napalm. Now it is used by some to refer to the appearance of a component that has burned up in circuit.

    Replacement parts are one thing - finding why they blew up might be another.
     
  9. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    The little bugs that fly into the blue light bug zappers, or the electric fly-swatter tennis-racket become crispy critters.

    or

    That FET in the photo..that is now a crispy critter.
     
  10. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    beenthere...
    Why do you guys always talk in riddles. breakfast and napalm, napalm, it's an explosive , am i right....:confused: I am having a hard time trying to figure out what you ppl are babbling about :D

    and there is that too...
     
  11. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    Yep I can see it now.
     
  12. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    I googled for a schematic and I got nothing.
    and to makes things worse nodevice.com scammed me out of a few bucks.
    I paid cause they said they have the service guide and what they gave was a whole lot of crap. Without a complete schematic what is the use of a service manual.
    I am posting what they are selling. mod's do not remove the pdf as I have paid for it and I want others to see and know. I am the legal owner of the pdf.
    what they gave me are the things I know by heart.
    I truly am pissed today. :mad:
     
  13. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Rifaa,
    What model is this monitor?
    [eta]
    Never mind; I didn't see your post about it being an AL2216W.

    I couldn't find one either. You'd need to get the schematics from a level 3 repair facility, or send the board in for repair.

    If you knew what it was supposed to do, that would help a good bit.
     
    Last edited: Apr 28, 2010
  14. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    I am trying to figure out the chip. I have already taken some info from the board, let me draw a quick diagram.

    This is what I can make out of the trace, the Vcc pin tells me that this is not a standard PWM. like 3842 and the rest.
    I checked all the data I have to see if any PWM matches to this pin layout, no luck. Has any one seen such a chip pin layout.
    The MOSFET is SuperMESH FET, a 10A, 0.65Ω On Res, 600V, 115W monster.
    I donno why they have used such a fet with a little supply, probably to keep the heat generated to a minimum.
    I could easily make the DSP run from a PC PSU but the inverter uses around 24 to 28 from the looks of it.
    So no go here for now, but if I had the Led's that I bought with me I could have replaced the back lite with the leds.
    Back lit LED replacement is something I am going to do as soon as the LED's arrive from HK and the clad boards from USA. This is going to be a fun project.
     
    Last edited: Apr 29, 2010
  15. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    It seems a dead end here huh!!.
    Well, I am not through with it yet.
     
  16. rjenkins

    AAC Fanatic!

    Nov 6, 2005
    1,015
    69
    I just get 1x1 pixel jpgs, no images, sorry.
     
  17. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    but the photo's are public.
    check my albums
     
  18. eblc1388

    Senior Member

    Nov 28, 2008
    1,542
    102
    I don't want to check your album. I just want to see the image along with the post.

    Why don't you attach the image like everybody else does? :mad:
     
  19. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    now don't get cranky, you know I did attached them and every one can see them with the post and to be sure I made em public.
    I guess I have to reup them at photo bucket so that these kind of thing won't happen.
    Ok guys, sorry for that, photo's are attached now too
     
  20. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    I dug up this thread cause it is time to do something about it.

    Last night I sold the 19" AcerHP Monitor that I fixed.
    Without a second one I am beginning to see the difficulty in Multitasking :D

    This monitor's supply chip is available from the company. RM contacted them and they said they sell 'em in huge numbers..:eek:.
    Which means I have to do without the original supply....

    Cooking in progress.......stay tuned.
     
Loading...