DEC Rackmount 7000 AXP Installation And Owner's Manual page 113

Perform the following procedure to remove the sequencer and auxiliary dc voltage
regulator tray:
Before performing the following removal and replacement
procedures, switch off the circuit breakers on the back of the
XMI chassis and on the power controller.
1. Extend the XMI chassis for service (see Section 5.3.2).
2. Remove the top cover (see Section 5.3.3).
High voltage is present on the power supply connectors for about
30 seconds after the XMI circuit breaker is turned off.
3. Disconnect the power supply connectors from the tray (see Figure 5–21 and
Figure 5–22).
4. Remove the bottom cover (see Section 5.3.4).
5. Remove the two power distribution cables by unplugging the connectors and
pushing the cables back out of the way (see Figure 5–25).
6. Remove the CK-DEMNA Ethernet connections, if used.
7. Remove the two screws securing the sequencer and auxiliary dc voltage
regulator tray in the power supply assembly (see Figure 5–25).
There are two cables connected to the sequencer and auxiliary
dc voltage regulator tray that must be disconnected. Disconnect
these cables as the tray is being slid out of the chassis.
8. Remove the sequencer and auxiliary dc voltage regulator tray from the power
supply assembly.
To replace the sequencer and auxiliary dc voltage regulator tray, reverse steps 1
through 8.
Removal and Replacement
WARNING
WARNING
NOTE
Removal and Replacement 5–49