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    #1

    Viewsonic Q19WB

    My monitor finally died today after it started having problems staying powered up a little over a month ago. No big deal, I used the advance warning to replace it before it died. I do want to repair it though to keep as a backup.

    Inverter ILPI-025 REV:E 2007.01.15 79069140

    I have fixed numerous electronic items but never an inverter module.

    I have the unit disassemled.
    C815 1000mf 25v (bulging)
    C818 1000mf 10v
    These seem to be the two most important parts to replace as they are directly connected to the switching transistors D803 & D805

    I also plan on replacing:
    C820 47mf 25v
    C501 470mf 25v
    C817 470mf 25v

    I was open to suggestions from people with more experience as to what other parts you would replace, if any? It seems silly to me to just go ahead and replace every single cap on the board and totally ignore switching transistors and various diodes and what about the ceramic disc caps?

    Anybody know the part numbers/values of D803, D805, C813, C814 ?

    Thanks
    Tags: None
    #2
    Re: Viewsonic Q19WB

    Originally posted by justintempler
    My monitor finally died today after it started having problems staying powered up a little over a month ago. No big deal, I used the advance warning to replace it before it died. I do want to repair it though to keep as a backup.

    Inverter ILPI-025 REV:E 2007.01.15 79069140

    I have fixed numerous electronic items but never an inverter module.

    I have the unit disassemled.
    C815 1000mf 25v (bulging)
    C818 1000mf 10v
    These seem to be the two most important parts to replace as they are directly connected to the switching transistors D803 & D805

    I also plan on replacing:
    C820 47mf 25v
    C501 470mf 25v
    C817 470mf 25v

    I was open to suggestions from people with more experience as to what other parts you would replace, if any? It seems silly to me to just go ahead and replace every single cap on the board and totally ignore switching transistors and various diodes and what about the ceramic disc caps?

    Anybody know the part numbers/values of D803, D805, C813, C814 ?

    Thanks
    See my response in the other forum.

    PlainBill
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

    Comment

      #3
      Re: Viewsonic Q19WB

      The Viewsonic Q19WB looks almost identical to the Acer AL1916W found here:
      https://www.badcaps.net/forum/showthread.php?t=7777

      The only difference I can tell is the Viewsonic has an additional audio circuit which is missing on the Acer AL1916W

      This is the attachement with the 5 caps I had planned on replacing:
      https://www.badcaps.net/forum/attach...chmentid=11474

      The audio section of the board has 5 caps which I can safely ignore replacing.

      so that leaves
      C807 47mf 25v
      C827 47mf 25v
      and the monster C804 100mf 450v
      That brings the total to 8 caps for replacement.

      D803 (SP10100c) D805 (SP1040c) are Schottky Barrier Rectifiers, I'll ignore replacing those unless someone thinks otherwise.

      Comment

        #4
        Re: Viewsonic Q19WB

        Originally posted by justintempler
        The Viewsonic Q19WB looks almost identical to the Acer AL1916W found here:
        https://www.badcaps.net/forum/showthread.php?t=7777

        The only difference I can tell is the Viewsonic has an additional audio circuit which is missing on the Acer AL1916W

        This is the attachement with the 5 caps I had planned on replacing:
        https://www.badcaps.net/forum/attach...chmentid=11474

        The audio section of the board has 5 caps which I can safely ignore replacing.

        so that leaves
        C807 47mf 25v
        C827 47mf 25v
        and the monster C804 100mf 450v
        That brings the total to 8 caps for replacement.

        D803 (SP10100c) D805 (SP1040c) are Schottky Barrier Rectifiers, I'll ignore replacing those unless someone thinks otherwise.
        You probably shouldn't bother replacing the 100uF 450V. Senior members here (PCBONEZ et al) say that generally they aren't the ones that fail - even the CapXons are OK, because the conditions are less brutal. Plus it'll save about $6.

        Comment

          #5
          Re: Viewsonic Q19WB

          The Problem was the power shut off after 1 sec

          The fix I only had to replace 1 CAP , I have Been replacing with similar farads MORE voltage to insure LIFE

          Look at the middle of the board closest to the inverter ...That was the cap for me

          Many problems result in power failure, I was lucky to spend 20$ on this monitor spent 30- min to an hour to fix great deal.

          Comment

            #6
            Re: Viewsonic Q19WB

            I'm having a similar problem with a q19wb.
            Opened it up and found no evidence of any sort of internal damage, or bad caps.
            I read all the related threads and decided to change the same 5 caps anyways...
            https://www.badcaps.net/forum/attach...chmentid=11474

            Put it back together, no change.

            It turns on, receives signal albeit low light, grainy and flickery.
            After 2-3 seconds the display shuts down.
            I'm testing it as the second monitor on a dual display, so i can change the resolution while it's running.
            Upon the change, signal is received, display is dark, grainy and shakey, then off again.
            The dual monitor setup works fine with another monitor.

            Comment

              #7
              Re: Viewsonic Q19WB

              Originally posted by Mouse View Post
              After 2-3 seconds the display shuts down.
              If this is "2 seconds to black", then see (starting with post #13 and #14)

              https://www.badcaps.net/forum/showthread.php?t=10419

              Start with that and ask questions. Concentrate on

              a) bad caps
              b) bad secondary inverter transformer
              c) bad ccfl
              d) bad ccfl wiring
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              Comment

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