H744 +5 supply - easy to fix? - test-drb@ccmp.vtda.org

3 Mar 2004

On Mar 3, 16:38, Brad Parker wrote:
...

 I finally got my TS11 racked this morning and after a good cleaning
 found that it has no +5v.  (I must say, I love DEC manuals...)

 Looks like the H744 supply is not working.  Anyone know about these?
 Are they easy to fix?  Should I just pull it, find a schematic and start
...
  probing? 
It's used in various devices, from KL10s to 11/34s so the schematic
shouldn't be hard to find, and yes, they're fairly easy to work on.
 It's a fairly simple circuit based on a 723 regulator chip.

I think I do have a spare, but I doubt if you want to pay transatlantic
shipping :-)  H7440 and H7441 are very similar (different circuits,
same purpose).

-- 
Pete						Peter Turnbull
						Network Manager
						University of York