Ariel.

While it is sometimes possible to clip the leads on the top of the board 
and use the remaining leads to mount new diodes, I suggest that "is 
cheating".  I always remove the board from the heatsink and de-solder 
the diodes from below.
Usually, the thermal pads will stay in place and can be re-used unless 
they become torn.

73,
Don W3FPR
On 10/31/2012 10:34 PM, Ariel Jacala wrote:
> Don,
>
> I took off the shield on the KPA100 and those two diodes are tight against 
> the back panel and the toroid.  What would you recommend is the best way to 
> desolder and replace those?  It is tight against the back panel and a toroid. 
>  I do not want to risk damaging the nearby toroid - so I think I will remove 
> the the standoffs and remove the PCB from the heat sink and desolder it from 
> the back side (non component) side.   Is this what you would do?
>

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