Tekelec T1000 Hardware Manual page 134

How to Replace T1000 AS FRUs
Procedure 7-11. Replace a Removable Media Disk Drive Assembly
1.
Ensure that the following have been done:
• An RMA has been obtained (see Procedure B-1, "Obtaining an RMA," on
page B-2)
• A spare removable media disk drive assembly is available. Inspect the
replacement unit and its shipping container for indications of damage. If
damage is noted, contact the site supervisor or report damage to the
carrier. Ensure that the contents in the shipping container are complete;
notify the site supervisor or Tekelec Customer Care Center of any
discrepancies.
NOTE: T1000 AS removable media drives and adapter are considered one
FRU. Remove and replace the entire adapter assembly including both
removable media drives.
WARNING: This procedure CANNOT be performed while the T1000 AS
chassis is powered on. Never power OFF a T1000 AS chassis until the
application software and platform operating system (OS) are shut down. If
possible, use the procedures in the application manual for a "soft
shutdown." If the application interface is not operating or is not accessible,
a hard shutdown (turning OFF the breakers) is sometimes required. Contact
Tekelec Customer Care Center before doing a hard shutdown.
2.
Turn OFF the circuit breakers that supply power to the T1000 AS chassis
containing the removable media disk drive assembly to be removed.
To locate the circuit breakers supplying power to the T1000 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 T1000 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 T1000 AS chassis
are turned OFF by measuring the voltage with a VOM on the cable that
connects the T1000 AS chassis to its breakers. Both A and B power LEDs on
the front panel of the T1000 AS chassis should be OFF.
3.
Prepare the T1000 AS chassis for access to the FRU using one of the following
procedures:
7-34 910-0095-001 Revision J November 2007