开云体育

I have a 465B that had a intermittent beam. 90% of the time the screen was blank. I ended up changing the multiplier (although I am not sure that was the problem) and the vertical preamp board and now my trace is back but there is a problem that is the same on both channels. The problem is on all divisions to a degree. I have changed some of the attenuator settings and even tried adjusting the compensation from the preamp board but it has little effect. Does anyone have any familiarity with this issue or can at least point me in the direction I should look first?

/g/TekScopes/photo/56677/12?p=Name,,,20,1,0,0
/g/TekScopes/photo/56677/13?p=Name,,,20,1,0,0

Something strange I have noted is when I probe say test point 1 (the resistor coming out of the attenuator box) or TP2 @ CR1193 on the vertical preamp the trace on the broken scope blurs so much you cant even see it anymore, the screen just becomes brighter and the test scope gets a blurred out trace, its there, just fat. When I test the diode at point 9 I get a clean trace and the damaged scope does not blur. Im not sure if this is related or if I am doing something wrong. I was probing a 465 (not B) last night and did not have any of these problems.

Another question about the manual. The arrows to the test points in the Figure 8-11 diagram dont seem to point to a definite spot. i have been looking at the schematic to try and determine where exactly I am supposed to probe. Am I doing this right?