D20 Service Position
Attention: When placing your Model D20 subsystem into the service position, it is
essential that all stability plates are firmly in position to prevent the rack from toppling.
Ensure that only one system drawer is in the service position at a time.
Before doing any service actions inside your Model D20 subsystem, put the Model D20
subsystem into the service position. To place the drawer into the service position, do
the following:
1. Open the front rack door.
2. If your Model D20 subsystem is equipped with two blue thumbscrews securing it to
the rack, remove the thumbscrews at this time. The screws are located on the
bezel, just above each subsystem release latch.
1 Front Bezel
2 Transport Retaining Screw for System Drawer
3. Release the subsystem release latches located on the left and right side.
4. Pull the system drawer out from the rack until the rails are fully extended.
Note: When the system rails are fully extended, safety latches on the slide rails lock
into place. This prevents the system from being accidentally pulled out too far
and dropped. The following illustration shows a system drawer in the service
position.
Chapter 8. Removal and Replacement Procedures 125