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Field Replaceable Units
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 cables 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.
3.
Prepare the T1100 AS chassis for access to the FRU using one of the following
procedures:
WARNING:
frame when working on electronic components.
• Procedure 7-2, "Slide T1100 AS Chassis Out from Frame," on page 7-10
• Procedure 7-4, "Remove a T1100 AS Chassis from Frame," on page 7-12
4.
To replace the CD/DVD drives, first open the front fascia by unscrewing the
knurled screws on either side of the chassis, and use the key to unlock the
front fascia. Once unlocked, the front fascia swings open from the top of the
chassis. The CD/DVD drives are above the square fan on the left side of the
chassis.
910-2969-001 Revision H, February 2007
DRAFT
Always wear an ESD wrist strap grounded to the bench or
7-33
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