Hi everyone,
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My HP8594E has a temperamental PSU, sometimes everything just works fine otherwise the SA just doesn't turn on.
Something is obviously wrong and needs to be debugged.
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I've not opened the case yet. I've just searched a bit the internet (
HP doesn't provide schematics but people have already attempted repair.
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I may have to work on the "mains connected" (120VAC US or 220VAC Europe) side.
So I just want to be sure that I would be safe with a differential probe, and if I use a diff probe, an isolation transformer wouldn't be needed.
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Seems that "curious marc" is using a variac as some form of isolation transformer:?
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In general, do you guys have some links or checklists for safety when working on these kind of switch mode power supply.
Thanks!
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Best regards,?
