IBM 5155 Power supply schematics or info

[Tony Duell]

> 
> > Alos check the output capacitors. A dried up one will cause all sorts of
> > problems.
> 
> All the capacitors of this power supply were replaced, all semiconductor
> tested, various control done ....
> but the problem remain the same : the outputs are a few low , sufficent to
> trigger under voltage protection.
> With under voltage protection disabled, it work without problem with a hard
> load.
> Now: it's correct to adjust the trimmer R18 to obtain correct outputs ?

I think that would be OK. While it's a bad idea to randomly make 
adjustments, you are not doing that. You have a fairly clear idea of 
what's going on, and what that trimmer adjusts.

I'd try twaaking it to see if you can get the voltages within range.

-tony