Works if you charge up the nicad packs out of the machine, then introduce
them, but the charge circuit is not working. The full service manual is out
there , but wondered if anyone had worked on one.
At the moment I'm working on the power supply board in isolation from the
other boards, anyone know if this is valid. The schematic does not seem to
show any control lines back to the mains-hot oscillator. Seems it would be
operational (if it was working) all the time the scope is connected to the
mains, regardless of the on/off switch , which seems to be for the sake of
batteries only. Otherwise a matter of making up extender connections for the
interboard connectors, to work on the whole scope un-wrapped.
Everything, so far tested, in that oscillator in the way of transistors and
coils etc seem to be ok testing cold and plenty of high voltage DC from the
mains on the main supply cap, but no oscillation