Viewsonic lcd VA1912wb

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  • pmapa
    New Member
    • Oct 2008
    • 2

    #21
    Re: Viewsonic lcd VA1912wb

    I chek or chance evry time litle (47uF?) elko's between two optocoupler and heatsink in secont picture left. Very meni time its faulty.

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    • d1rage5
      New Member
      • Apr 2009
      • 1

      #22
      Re: Viewsonic lcd VA1912wb

      Did you ever get this item fixed?

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      • albertwong
        Member
        • Jan 2010
        • 31

        #23
        Re: Viewsonic lcd VA1912wb

        I find the part from digikey.
        http://parts.digikey.com/1/parts/150...ip-aop605.html
        They are 0.87 each.
        I have the same problem with my board.
        But when i use the diode mode in my MM, I do not find any short in the chip.
        How do you know it is toasted?
        Was there any short?
        I am learning.

        Comment

        • mockingbird
          Badcaps Legend
          • Dec 2008
          • 5484
          • -

          #24
          Re: Viewsonic lcd VA1912wb

          I just re-capped the PSU and replaced the two P605 ICs on it (Which are now obsolete, and I didn't want to buy the obvious substandard eBay fakes). I had to wait a while to get SOP to SOIC converters. I'm pretty sure they were no good, and there was also brown discoloration underneath them. I destroyed some pads desoldering them, but I managed to bridge whatever needed to be bridged just fine with some molex cable wire. I used Vishay SI4564, a bit overkill at 10 amps, but should run a lot cooler because they're running way under spec. All in all, took me a few hours, but fiddling with the tiny SOIC-8 chips and adapters was by far the most time consuming part.

          My goodness, the colors and brightness/contrast is awful on this thing (The 2004 era Samsung 710n was much more vibrant). Oh well, what do you expect from a 2006 Chi Mei panel. I must have invested somewhere between $10-$15 dollars on this thing. Definitely worthwhile it in the end.
          Last edited by mockingbird; 11-20-2013, 10:46 PM.

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