开云体育

I like this series of scopes,? so was drawn to a 2230 (100 Mhz digital storage) at a low price.?? The seller said it lit up but he couldn't figure out how to run it.?? Well neither can I - in it's present condition!

I haven't used the storage models of this series before but after skimming the op and service manuals,? what appears to be happening is, something is forcing the digital side to run one of the "exercisers" every time on power-up.?? For the first few seconds after the beam becomes visible,? I can see normal traces that respond to controls (if you're quick about it) which indicates the analog side is working.?? But then the screen changes to a pair of concentric boxes and center axis lines.? The inner box can be moved from side to side with the horizontal position control but that's the only control that has any effect.?? Nothing other the cycling power will make this display go away.

My best guess is that this is the "Box" exerciser display that would normally be enabled by pressing one of the Menu Select/DISPLAY buttons during power-up.?? If so, then it would seem that something is doing so unintentionally - i.e. a defective switch or a failure in the circuitry attached to it.?? I can see that a "stuck switch" would cause the instrument to run the Box exerciser, but it normally should be possible to exit the exerciser by pressing one of the other buttons,? which doesn't happen.

I looked for a schematic of the front panel board in the service manual but didn't find much.? Is additional documentation on the 2230 available?? If I can get it working I'd use it mostly in the analog non-storage mode.? Thanks for any suggestions!