Viewsonic lcd VA1912wb

[pmapa]

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.

[d1rage5]

Re: Viewsonic lcd VA1912wb

Did you ever get this item fixed?

[albertwong]

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?

[mockingbird]

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.