IBM 5155 analogue display fault

[jpero at sympatico.ca]

> >
> >This repair method is stronger.
> >
> >Cheers,  Wizard
> >
> 
> Hi
>  Medical equipment standards are a little different than what
> we do. I also do this type of repair and consider it more
> than adequate. There are several problems though. First is
> that if one scrapes the plating off to bare copper, a solder
> to copper joint ages to form a high resistance connection.
> This is increased by temperature ( mostly a problem in high
> power locations and old tube circuits ). The other reason is
> that such joints are sometime difficult to verify if the
> solder was properly done, especially when the wire is large
> compared to the trace.
> Dwight
> 
I'm no fool.  I have seen how solder itself behaved due to my long 
experience with it.

For very wide traces, I use solder wick if one needed to cover a 
width, fine.  If more wider than that, I put down two side to side 
even three.

For eyelets, I use a length of wire bent into U with the bend wrapped 
around the component's lead with wire laid side to side on the trace. 
 I size the  wire's gauge for two wires side to side to fit the 
trace's width for this application. 

Do tell more about the medical application especially on trace 
repairs like this?

Cheers, Wizard