20 Jul
2005
20 Jul
'05
5:52 p.m.
Hello Tony,
The fault is repaired, it turned out to be a bad solder joint on one
of the resistors. After resoldering, all voltages are fine.
Thanks,
Ed
Hi All,
I have a PDP-11/05 (11/10) in a 5.25" box version which I'm putting
together. It's going to be equipped with 8Kb of core and a RX02
floppy interface. When powering up, led's come on, but there is not
much action to get. Look like the -15V of the PSU is not working
properly.
The PSU is a different one compared to the well known bricks used
in BA11 boxes. This one delivers +5V, +15V and -15V and is labelled
5409728.
Anybody have a schematic of this PSU by any chance?
I'm suiprised it;'s not on Bitsavers. Have you looked at all the 11/05
and 11/10 docs there? Maybe also the GT40 printset, the GT40 is built in
the samve box with the same PSU (and for that matter an 11/05 CPU board
set)
I certainly have this schematic, but no easy way to get it to you. If you
need help sorting out the PSU, feel free to ask me.
-tony