DEC TZ885 mini-library (nearly OT :)

[Adrian Graham]

> diagnostics as long as the robot isn't going nuts (rare) but 
> I haven't found which button actually selects said test or 
> function. Also, 2 of them don't open the drive door when 
> expected so the tape bounces off repeatedly until the robot 
> gives up....

Sorted it......it occurred to me this morning that we hadn't checked the
PSUs in these units, knowing DEC and it's choice of poor PSUs for external
tape units!

cheers

w