Author Topic: Bally / Stern Power Supply AS2518-18 Rebuild  (Read 1767 times)

0 Members and 1 Guest are viewing this topic.

Marty Machine

  • Guest
  • Trade Count: (0)
Re: Bally / Stern Power Supply AS2518-18 Rebuild
« on: May 20, 2009, 12:21:45 AM »
Oh another tip, in case the bridges are to mount on a plate or heatsink :

1) place the BR's roughly in place on the PCB (as you've shown).
2) BEFORE soldering, BOLT bolt the bridges in place on the heatsink (with the PCB still attached).
This will pull all the bridges flat to the heatsink nicely without putting any strain on the legs or PCB joints.
3) NOW solder the legs on the PCB.
The solder joints are now under much less stress & strain and won't be prone to failure from mechanical strains.

I've found from previous experience that soldering 1st, THEN bolting can deform and crack (or pull legs loose) on the BR's.

just my 10c  #@#
MM.