Sounds like you have a short past the PS. Try to get a manual if you
don't have one before you pull off any connectors. If you do get
brave and pull them mark them first. If the ticking stops after you
pull some of them then you'll have a general idea of where it's at.
If it still ticks the problem is with the PS on the secondary of the
power transformer. Could be feedback to primary too but not likely.
Good luck with it.
Pat
--- In TekScopes@y..., Willard G Wood <willardgw@j...> wrote:
Any one that can help with my problem on a 485 oscilloscope, I would
appreciate it.
SYMPTOMS
1)-----Pwr "On" Ticking sound from switching power supply
2)-----Some of the Ne-2's light on various power modules
3)-----Removing ground wire from voltage multiplier, did not help!
4)-----RF type voltage at the -295 voltage check point
5)-----Rectifier filter caps have around 160 volts
6)-----Rear fan will "kick" turn some times
7)-----If I remove the voltage multiplier, entirely will the
switching
power supply still run, I know removing the coax drive cable to the
transformer stops everything.
8)-----Any ideas on this model will help....Thanks!
