Tektronix capacitor change

[eurofox]

Hi,

Could you guy's with experience in changing caps on a Tek  scope board validate this system? 



Is hot air a better solution?

Please share your experience.

Thanks 

eurofox

[David Hess]

As long as it does not rip the pad off of the printed circuit board, it is probably better than heating the pad twice.  I have occasionally done the same thing when removing parts that are going to be replaced without testing.

[eurofox]

Is use of hot air no better to remove the caps?
Ripping off the caps from the PCB could destroy the PCB.
If you have to remove up to 100 caps you can have luck with 90% but the rest could be catastrophic.


eurofox

[David Hess]

Is use of hot air no better to remove the caps?

Ripping off the caps from the PCB could destroy the PCB.
If you have to remove up to 100 caps you can have luck with 90% but the rest could be catastrophic.

I would not use hot air to rework a board like that because just a soldering iron works fine.

With surface mount parts, it is sometimes easier to crush and remove the body with a pair of pliers and then unsolder the leads from the board.

[bitshape]

With a Tweezer-iron or just a set of 2 individual Soldering Irons you can take the SMT Caps off very easy. But please practice beforehand with some scrap board.

[TMM]

With surface mount parts, it is sometimes easier to crush and remove the body with a pair of pliers and then unsolder the leads from the board.

Easier when access to the part is difficult but at a very high risk of lifting pads/traces in my experience.