5 Mar
2001
5 Mar
'01
5:03 a.m.
The PCjr bricks aren't too uncommon so I'll wait and I'm sure one
will turn up. My time is better used fixing some of my other non-
working machines. In any case thanks for the details of the
construction. It'll go in my archives for future use.
ciao larry
Reply to:
lgwalker(a)look.ca
BTW. Does
anyone have an extra power supply for jr. Will pay or
trade. I've never powered it up and it still had the inserts in the
disk drives.
I assume you mean the PSU 'brick' and that you have the PSU card (it
has the power switch on it, so if you have that, you have the card) in
the machine.
In which case, Make one :-).
It's just a plain 17V transformer, at about 3A. The outside 2 pins on
the connector go to the ends of the secondary winding, the centre pin
goes to mains earth. It is not a centre-tapped transformer (or at
least, the one I built for my machine isn't and a centre-tapped
transformer would make no sense at all with the circuit of the PSU
board in the TechRef).
In other words, something like this :
500mA fuse To PCjr PSU
connector
L o-------------O\O-----------------)||(----------------<
)||(
120V )||( 17V +------<
)||( |
N o---------------------------------)||(---------)------<
|
E o----------------------------------------------+
Use a 50VA (or so) transformer, and add a fuse in series with one side
of the secondary if you like (I did)
-tony