Hello and thank you all for chiming in on my topic; all excellent
suggestions. I have been “out” since I submitted that, so I just now was
able to sit down and read through the last days digests. This is probably
the 10th HP5328A that I have had to fix the PSU on, so it shouldn’t be
such uncharted
Well, it will look like everything is shorted to ground if some major
power line on the PCB has a component that has gone really full sort.
You will only find this out either by un-soldering it (eventually) or
you use a high end ohmmeter that can measure really low ohms in 4-wire
mode with a
What I do to trace shorts on power busses is to apply some current from a
few volt power supply with a limiting series resistor, then probe along
the bus w/ a DMM or analog millivoltmeter. The smaller the measured
voltage, the closer you are getting to the short. It's like a 4 terminal
