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Hardware Manual
WARNING: Always wear an ESD wrist strap grounded to the bench or frame
when working on electronic components.
Next, turn OFF the circuit breakers that supply power to the T1100 AS chassis to be removed.
To locate the circuit breakers supplying power to the T1100 AS chassis, refer to the system
interconnect diagram for the system type and/or read the labels on the breakers. To access the
circuit breakers on some frames, it may be necessary to remove the plastic covers on the front
of the breakers. If the covers are removed, to maintain NEBS compliance, make sure they are
replaced when the FRU replacement has been completed.
WARNING: A T1100 AS chassis is redundantly powered from both A and B
-48 VDC buses. Ensure that both the circuit breaker supplying A power to a chassis
and the circuit breaker supplying B power to a T1100 AS chassis are turned OFF
by measuring the voltage with a VOM on the cable that connects the T1100 AS
chassis to its breakers. Both A and B power LEDs on the front fascia of the T1100
AS chassis should be OFF.
2. Remove the front door and any plastic panels from the rear of the frame.
3. From the rear of the frame, check all cables attached to the chassis for correct labeling.
If any labels are missing or damaged, create a label that indicates what connection it is attached
to and where the other end is connected.
4. Disconnect all cables from the rear of the chassis.
5. From the front of the frame, remove the # 12-24 Phillips screw from each of the chassis retention
brackets (see
Figure 63: Chassis Retention Hardware
Do not remove the screws in the frame adapter brackets.
Figure 63: Chassis Retention Hardware
910-2969-001 Revision K, June 2009
Field Replaceable Units
on page 109).
109
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