Section 2.9.2 “System LED Indicators” on page 72
2.4 How to Position the System for Service
This procedure describes placing the system in position for service by sliding it out
of the rack enclosure without removing it from the rack. All service procedures
except removing and replacing the main logic board can be performed while the
system is still attached to the rack enclosure.
Note - Sliding the system out of the rack is not required for servicing disk drives
and power supplies.

2.4.1 Before You Begin

Caution - Unless the rack is bolted to the floor,you must extend the cabinet’s
anti-tip legs and adjust their stabilizing feet to the floor.You must level and secure
the cabinet to provide a safe working environment.

2.4.2 What to Do

1. Extend and adjust the cabinet’s anti-tip legs.
2. Open (or remove) the front and back rack enclosure door(s).
3. Disconnect all external cables attached to the back panel of the system.
As you disconnect each cable,label it with a strip of masking tape indicating the
cable’s origin and its terminating connection.
Caution - Do not disconnect the power cable(s) from the system power inlet(s)
unless you are installing or replacing the powerdistribution board,the main logic
board, or a power supply.The power cord grounds the system.
4. Loosen the four captive screws that secure the system to the left and right
vertical rails at the front of the rack.
60 Sun Enterprise 220R Server Service Manual ♦January 2000, Revision A