[amsat-bb] Re: Surface Mount Repair

["Karl H. Görsmann"]

Roy wrote:
> Hi Guys,
> 
> I am trying to replace a 22 pin surface mount IC on a piece of Panasonic 
> video quipment.  I have all of the leads unsoldered but now I find that 
> the IC is stuck to the board, maybe intentionally.  It doesn't appear to 
> be just the circuit board coating.  It's more like the whole bottom 
> surface is cemented.
> 
> I would appreciate hearing from anyone, off line, who has experience in 
> removing a stuck IC from the board.  I have tried flux removerand 91% 
> Isopropal Alcohol with no luck.  I hesitate to force it or destroy the 
> chip since there are traces running beneath it.  Any ideas of a safe 
> solvent or another way to unstick this thing?
> 

Hi Roy,

are you sure it is cemented? Maybe it is an 'exposed pad' pad for 
thermal purposes. Take a look on Google how to handle.

73, Karl  DL3DA in Goettingen