Tekelec T1000 Hardware Manual page 139

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:
WARNING:
frame when working on electronic components.
• Procedure 7-4, "Slide T1000 AS Chassis Out from Frame," on page 7-8
• Procedure 7-6, "Remove a T1000 AS Chassis from Frame," on page 7-10
NOTE: If this procedure is being performed to move PCI cards from a
failed T1000 AS chassis to a replacement T1000 AS chassis, Procedure 7-6,
"Remove a T1000 AS Chassis from Frame," on page 7-10 is recommended.
4.
Determine the slot location of the PCI card to be removed using the T1000 AS
PCI slots label located on the left rear of the of the chassis. See Figure 7-21 on
page 7-40.
NOTE: Each T1000 AS chassis has a unique PCI configuration label listing
card types and slot arrangements.
5.
From the rear of the frame remove any cables attached to the PCI card to be
removed.
6.
From the rear of the chassis remove the rear top cover.
a.
First loosen the four screws in the guide slots on both sides of the rear top
cover.
b.
Unscrew the captive fastener at the rear of the cover until it releases.
c.
Pull the cover toward the rear until the screws are clear of the guide slots
then lift up. See Figure 7-21.
910-0095-001 Revision J November 2007
Always wear an ESD wrist strap grounded to the bench or
How to Replace T1000 AS FRUs
7-39