Re: TEK 2236 sweep problem
|
When you say "sync works", do you mean that the triggering works?
toggle quoted message
Show quoted text
Get a service manual and make sure that you checked all of the low voltage power supply voltages. Do you have another oscilloscope to use for testing? How does XY mode behave? The X and Y position controls should operate evenly over their range. Is the sweep accuracy good over the part of the trace which is not compressed? I might guess that one of the leads going to the horizontal deflection plates has fallen off and coupling from the intensity signal is coupling into it. This just requires a visual inspection to verify. On 18 Nov 2014 10:26:03 -0800, you wrote:
My 2236 has just failed. When I turn up the intensity, the horizontal sweep moves to the right,leaving half the display blank. The left edge of what is displayed is compressed. I pulled the cover and did a quick check of the LVPS voltages and they are ok. I may have missed some. The Vertical inputs and amps seem ok, and sync works. Brightness seems normal. Any ideas? |
David Hess