Nortel 7400 Hardware Installation page 297

maximizes heat dissipation inside the shelf when only one power supply
is present.
2 Toggle to the standby position the power control on the power supply as
shown in the figure "Power control for the power supply on a Multiservice
Switch 7460" (page 298).
3 Hold the power supply so that:
• the handle and power control face you
• one hand is on the handle
• the other hand supports it from underneath
Refer to the figure "A power supply of a Multiservice Switch 7460"
(page 299).
4 Align the power supply with the open bay in the shelf assembly as shown
in the figure "Exploded view of the power supplies and a Multiservice
Switch 7460" (page 300).
5 Slide the power supply in. Tracks inside the bay align the power
connectors at the rear of the power supply with the connectors at the rear
of the bay. Stop pushing when you feel the connectors engage and the
captive screws at the faceplate of the power supply contact their threaded
holes.
6 Hand-tighten the 2 Phillips captive thumb screws to snug plus a 1/4 turn.
Do not overtighten.
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Chapter 39 Hardware procedures 297