Ac Input Assembly (Pn 70-31008-01) - DEC Rackmount 7000 AXP Installation And Owner's Manual

Removal and Replacement

5.3.14 AC Input Assembly (PN 70-31008-01)

The ac input assembly is located at the rear of the XMI chassis.
Perform the following procedure to remove the ac input assembly:
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 bottom cover (see Section 5.3.4).
High voltage is present on the ac front end tray connectors for
about 30 seconds after the XMI circuit breaker is turned off.
3. Disconnect the ac input connectors from the rear side of the ac front end
trays, between the trays and the fans.
4. Slide the XMI chassis back into the equipment cabinet.
5. Open the rear door of the equipment cabinet.
6. Remove the six screws that secure the exhaust grill to the XMI chassis and
remove the exhaust grill (see Figure 5–30).
7. Reach through the exhaust grill opening and disconnect the red and white
wires (spade lug leads) from the circuit breaker.
8. Reach through the exhaust grill opening and remove the outside nut from the
ground stud and disconnect the two ground wires (green/yellow) coming from
the ac front end tray connectors.
9. Reach through the exhaust grill opening and remove the inside nut from the
ground stud and disconnect the ground wire (green/yellow) coming from the
ac input line filter.
10. Remove the 8 screws (3 on the side, 1 on the top, and 4 on the rear) that
secure the ac input assembly in the chassis (see Figure 5–30).
5–56 Removal and Replacement
WARNING
WARNING