Maintenance And Troubleshooting; Exchange Of A Power Supply Module - NEC QX-S5526P Installation Manual

Installation Guide
QX-S5500 Series Ethernet Switches

7 Maintenance and Troubleshooting

7.1 Exchange of a power supply module

CAUTION:
QX-S5526T has power supply module of the AC type and DC-type. You can select AC power module or DC
power module for your switch as needed.
Install power supply modules of the same model on the switch. for power supply redundancy or a maintenance
exchange.
I. Installation tools
ESD-preventive wrist strap

Phillips screwdriver

II. Exchange of a power supply module
1) Reduce a fixed screw of the power supply module using a screwdriver.
2) Draw an exchanged module and remove a slot.
3) Take new power supply module out from a package.
4) Confirm whether power supply module is for AC power supplies or DC power
supply.(see Figure 7-1)
CAUTION:
The power supply module is heavy, so please treat by both hands. Correctly orient the power module with

the power supply module slot, grasp the handle of the power supply module with one hand and pull the
handle slowly with opposite hand. If only one power supply module is installed, install a power filler module
in the empty power supply module slot for good ventilation of the switch.
To prevent damage to the connectors inside the switch chassis, insert the power supply module gently. If

you encounter a hard resistance while inserting the power supply module, pull out the power module and
insert it again.
When a fixed screw doesn't tighten well, there is a possibility that a power supply module isn't inserted right.

Confirm whether a power supply module is inserted correctly.
Figure 7-1 Power supply module (left: AC power module, right: DC power module)
7 Maintenance and Troubleshooting
7-1