Re: TEK 485 - need help

Jeff W <vwthingy@...>

You stated that you checked, (repeatedly) the DC restorer diodes.
How did you check them?? They can only be tested with a curve tracer
or some other method that applies a few hundred volts to them, as the
common failure mode is breakdown under high voltage. (not shorting,
as simple diodes/rectifiers tend to exhibit)

DC restorer diodes on the 485 were one of the most common failure

Good luck, the 485 can be a bear to troubleshoot.


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