20 Nov
2004
20 Nov
'04
11:36 a.m.
If it's a simple board with just a top and bottom layer, then I normally
photocopy it and use that in conjunction with the real pcb to make a copy
of the traces.
I find it _much_ easier to trace connections with an ohmmeter than
visually. It's very easy for your eye to 'jump' to a neighbouring trace.
Of course you do try to follow the traces so you have some idea where to
check with the ohmmeter.
That said, if you have connectino diagrams, have you
thought about using
an ATX psu? it's ok for switch on/off just short pin 14 on the atx
connector (green wire iirc) to ground and that will turn on the psu.
IMHO the PSU is part of the machine and should not be replaced by some
other random replacement!. An ATX PSU was certainly not original in this
machine, and the aim of a repair/restoration is to keep the machine as
original as possible by replacing as little as possible (e.g. replace a
transsitor, not a PSU!). The way that PSUs have changed over the years is
somewhat interesting, and part of the history of electronics if not
computing.
-tony