Hi everyone,
I can't remember if I've asked you all this or not, so here goes! I repair vintage tech and have both an old Fluke760A and a more modern Time Electronics 9814. I bought the 9814 to replace the Fluke, as it's smaller, lighter, more accurate etc, etc. However, I had tested it when I bought it at the beginning of the year and everything was hunky-dory then. I left it on the lab floor and kicked it over one day - it was standing on end. Now it seems to be an order of 1000 times too low - 10V measures as 10mV! Time are no help at all, with the 'it's obsolete' excuse, but sent me the 'Technical Manual' for the MK3 version (not the one I have), which has no schematics. There's little , if any, info on the 'net, although I did find a teardown on a 9823 - which is a different beast, but contains broadly similar cards - except the reference board. So . . . I was hoping that just mayba someone might have a schematic for this old calibrator. I've dismantled it and checked for anything which could be shock damaged or loose, but nothing. The power supplies are fairly primitive and good, the processor is working ok as well. Any help would be appreciated!
Cheers all,
Mel