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Products => Test Equipment => Topic started by: richcj10 on April 24, 2013, 03:30:45 am

Title: keithley 2400 C power issue
Post by: richcj10 on April 24, 2013, 03:30:45 am
I have acquired this piece B/C it wasn't working. (nothing on the screen, no beep) I have found out that the AC in to DC (12v & 5v) is working but the 12V DC to AC to +-15, +-30, etc isn't.
I think the problem is at the front end of the transformer. does anyone have the schematic?

Thanks,

Rick
Title: Re: keithley 2400 C power issue
Post by: MetraCollector on April 24, 2013, 10:12:30 am
As I know, schematics are not available, I was trying to find some for K2000 with no success.
Anyway, service manual is available through G. and there are some flow chart for repairing these Keithley instruments.
GL !
Title: Re: keithley 2400 C power issue
Post by: free_electron on April 24, 2013, 03:04:50 pm
Most likely that big power hybrid is shot. On the bottom board there is an industrial power converter brick. Either a vicor or an ericsson. They are hard to find...

Title: Re: keithley 2400 C power issue
Post by: richcj10 on April 24, 2013, 03:09:07 pm
It works.
I get the 12v and 5v out of it.
I just discovered if I run my o-scope probe across one side of U3 (Main CPU)
it will reset and turn on with a "No Com" error.