To friends of the Optima

Our system controller 'fault' was fixed after a new STE bus power supply
was installed. Sadly for us, a rather more expensive cure than replacing
the on-board battery.  Incidentally, the CPU was stalling with the LED
lights indicating an interupt error (green orange orange) - I don't know
whether this is in any way diagnostic of power supply vs. battery as the
cause of the problem.  The on-board CPU battery was giving only 0.5v
however, significantly down on its rated value of 3.5v. I havn't fitted the
new one yet as everything seems to be running fine, but have one ready and
waiting, just in case....

Dave Mattey





Dave Mattey

Geology Dept, Royal Holloway College, University of London, Egham Hill,
Egham, Surrey, TW20 0EX

Tel:      01784  443587          Office
                        443582          Secretary
                        443637          Prism lab
                        443629          Optima lab

                        471780          FAX