18 Mar
2005
18 Mar
'05
12:07 p.m.
Is there a safety lock switch (perhaps on the back) that is normally
activated when installed in a rack that is not activated now while it is on
the bench?
Thanks,
George Wiegand
Vintage Data General Computer Hobbyist
----- Original Message -----
From: "Rick Bensene" <rickb at bensene.com>
To: <cctech at classiccmp.org>
Sent: Friday, March 18, 2005 10:13 AM
Subject: RK05 Help
Hello,
I have two RK05J drives, both exhibiting the same problem.
They are *not* currently connected to a system. I have them on the bench
cleaning them up and getting them ready to connect to a PDP 8/e system
after
a long period of storage.
There is the I/O terminator card installed in the proper slot in the drive
electronics backplane.
When the drives are powered up, the "power" and "load" lights are on,
and
the door release is activated so that the door can be opened and a disk
pack
inserted. However, the blower motor that provides the
air circulation for
the drive never starts up. I've checked both blower motors to assure that
they are not seized, and the both spin very freely. I traced the power
wires from the blower motor to a barrier strip, where I checked for
110V AC power, and there's nothing there. So, somewhere in the
circuitry, something isn't right. Any ideas?
Thanks,
Rick Bensene
The Old Calculator Web Museum
http://oldcalculatormuseum.com
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