Technical data

Removal and Replacement of Power Supplies and Fans
● Removal and replacement introduction...........................................................................41
● Power supply removal and replacement......................................................................... 42
● Fan removal and replacement........................................................................................ 44
Removal and replacement introduction
NOTE
Read the Installation and safety considerations on page 19 before servicing.
The field-replaceable units (FRUs) in the switch can be removed and replaced without special tools.
The switch can continue operating during the FRU replacement if the conditions specified in the
procedures are followed.
DANGER
The procedures in this manual are for qualified service personnel.
Before beginning replacement
NOTE
This document describes how to change field-replaceable units (FRUs) on a Brocade 7840 switch,
which has a port-side air exhaust. You must replace a failed unit with the same type of unit. This applies
to both power supplies and fans. A new FRU must have the same part number (P/N) as the FRU being
replaced. The manufacturing P/N is located on the top of the FRU.
CAUTION
Ensure that the airflow direction of the power supply unit matches that of the installed fan tray.
The power supplies and fan trays are clearly labeled with an orange arrow with an "I."
Use the external labels as a guide. Both the PSU and fan FRUs are labeled with the I airflow symbol to
indicate that they takes air in.
FIGURE 12 Airflow label
Brocade 7840 Extension Switch Hardware Reference Manual
41
53-1003127-02