Hi All
Newbie/oldie here looking for some help on the above oscilloscope.
I already have the service manual and have done some basic voltage and high/voltage checks with my fluKe meter and eht probe. All would seem to be in order, but both ch1 and ch2 traces are very out of focus. The high voltage diodes D941/2 appear to be in order as does the HV-cascade unit, this is giving me about 12Kv on the final anode. The other components (resistors etc) I have not yet got around to testing. The scope was purchased cheap with this fault, hoping that it was something simple to fix, maybe it still is. It's my old tired eye's that are letting me down.
I do not have the scope at home to do some screen shots, to show the problem. The two scan lines are about 20-25mm high with no image at all, just pure fuzz accross the screen.
There are three pdf files of the power supply to have a look at.
I look forward to any of you guys and gals replies.
Newbie/oldie here looking for some help on the above oscilloscope.
I already have the service manual and have done some basic voltage and high/voltage checks with my fluKe meter and eht probe. All would seem to be in order, but both ch1 and ch2 traces are very out of focus. The high voltage diodes D941/2 appear to be in order as does the HV-cascade unit, this is giving me about 12Kv on the final anode. The other components (resistors etc) I have not yet got around to testing. The scope was purchased cheap with this fault, hoping that it was something simple to fix, maybe it still is. It's my old tired eye's that are letting me down.
I do not have the scope at home to do some screen shots, to show the problem. The two scan lines are about 20-25mm high with no image at all, just pure fuzz accross the screen.
There are three pdf files of the power supply to have a look at.
I look forward to any of you guys and gals replies.
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