Fixing a HP34C

[agarza]

(07-12-2023 11:52 PM)teenix Wrote:  Upon re-assembly, you would have to check all the connections to see if power and signal paths are still valid. This could only be accomplished with an oscilloscope. Without one you could only apply pressure to the circuit board in the hope that it springs back into life.

The problem is getting the oscilloscope probes on the circuit board once assembled.

(07-12-2023 11:52 PM)teenix Wrote:  I have seen examples where the parts have been soldered to the film layer, but you would have to be careful not to overheat it.

I was thinking of soldering the components directly "a la surface mount". Do you have any photos of someone that has done that?

(07-12-2023 11:52 PM)teenix Wrote:  Here is a service file for E series calculators.

Thanks!