Re: Tektronix 2211 scope short-circuited
So I've checked the PSU of the scope and it seems in rather good condition. What I do see is that the IEC socket and 230-110V switch have a blackish coloration on their leads.
The main filtercap of 2200uF 80VDC measures fine with my multimeter (2153uF and +- 6M Ohms).
The diodes measure +- 0.5V over them and in the reverse it's 0. Which means they should be ok.
In any case I will replace the components on this vertical mains inlet. The PST39 transformer (as showed earlier) have some wear and tear marks, but I believe this might be caused due to stress of a different origin.
Nowhere on the PCB(s) are there any indicators that somethings has blown a component.
So I believe the fault lays in the PSU itself.
I also believe that someone serviced it before as some of the torx screws were removed using a wrong screwdriver.
Any other things I better check out?
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