Disk Pack Unloading; Unit Select Plug Swapping - Honeywell MSU0402 Manual

Disk Pack Unloading
1. Press the START/STOP button to stop spindle and pack rotation. The
START/STOP indicator extinguishes.
WARNING
To avoid personal injury after initiating disk unit cycle down, you must:
wait 30 seconds before lifting the disk pack access cover; then visually
verify that disk pack rotation has stopped before accessing the disk pack
area.
2. Open the cover.
CAUTION
During maintenance procedures the read/write heads sometimes are
positioned manually. Make certain that the heads are fully retracted.
3. Place the plastic canister over the mounted disk pack so that the post pro-
truding from the center of the disk pack is received into the canister handle.
4. Twist the canister handle counterclockwise until the disk pack is free of the
spindle.
5. Lift the canister and the disk pack clear of the spindle.
6. Close the cover.
7. Place the bottom dust cover in position on the disk pack and tighten it.
8. Store the disk pack in a clean cabinet or on a clean shelf.
Unit Select Plug Swapping
The removable unit select plugs allow the operator to easily change physical
addresses simply by swapping the pI ugs among devices.
The operator should maintain a log of all device address swaps (device, fromlto,
date and time, reason for change) so that the MSP diagnostic output and the
associated problem can be related to the correct physical device. These problem
history procedures reduce confusion on sites with large peripheral configurations.
Operating Procedures 3-3 AT71-03