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samsung y buffer ic's

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sidecutter_5:
hi,this is my first post (be gentle with me) i'm going to try to replace two of the ic's on my y scan upper buffer board,part no-lj41-05121a.has anybody got any tips before i start? I have access to a hot air smd rework /hot plate setup.it's access to experience im missing. thank's

Ohm Supplies:
Hello.

Yes, I've removed the ic's several times from this board & of sounds like you have the right kit to do it, what are you going to replace them with or are you going to make 1 good out of 2?
Regards
Andy

daz:
Hi Andy
I had this very idea myself after realising only one IC would fail, I thought I could make one board out of two, but while removing and replacing the IC provides no problems I encounter problems removing the silicon cleanly, and this caused problems when re sitting the IC.
Any tips for removing the silicon easily?
Thanks
Daz

brainstorm:
Hi all,

Is there a big saving replacing the IC ?
The complete board is not usually very expensive

Also, then there is the cause of the buffer IC failing,
Andy, I'm sure you make a fine kit for this very scenario!!

Brian

sidecutter_5:
hi,sorry for the late reply.Had a go at this with the rework station, but due to my inexperience with the equipment i had a problem or two.
1,removing the pins and the ic together.
2,removing the ic,
At first i stupidly thaught that it was only the pins that held the ic in position on the board,it is as you all probably know is held on by a approx 10mm square pad soldered on to the board.
Binned the rework station idea and the soldering iron came out.Cut the pins off the ic and working from the back of the board with a hot iron, diluted the lead free stuff with some nice lead/tin mix solder, the chip came off the board ok.
Taking the pins of the chip off the board was a bit of solder wick.cleaned up ok.
will be replacing with new fe 3407f chips,ex china @£1.50 each.
It,s worth a go.
regards ste

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