Brocade ICX 7750 Hardware Installation Guide - Manual (Page 47)

Brocade ICX 7750 Hardware Installation Guide 37
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FRU removal and replacement procedures
Cleaning the fiber-optic connectors
To avoid problems with the connection between the fiber-optic transceiver (SFP, SFP+, or QSFP+)
and the fiber cable connectors, Brocade strongly recommends cleaning both connectors each time
you disconnect and reconnect them. Dust can accumulate in the connectors and cause problems
such as reducing the optic launch power.
To clean the fiber cable connectors, Brocade recommends using a fiber-optic reel-type cleaner.
When not using an SFP, SFP+, or QSFP+ connector, make sure to keep the protective covering in
place.
FRU removal and replacement procedures
The field-replaceable units (FRUs) in the Brocade ICX 7750 can be removed and replaced by using
a #1 Phillips screwdriver. The switches can continue operating during the FRU replacement if the
conditions specified in these procedures are followed. This covers both the power supply unit (PSU)
FRUs and fan FRUs.
CAUTION
This document describes how to change FRUs for units with either an air intake or air exhaust.
You must replace a failed FRU with a FRU of the same type. 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.
If a mismatched power source or fan assembly is installed by mistake, a warning is sent to the
console. The warning messages will be similar to the following:
• For a fan mismatch: [WARNING, Brocade ICX 7750, MISMATCH in Fan Air Flow direction.
Replace FRU with fan air flows in the same direction.
• For a power supply: [WARNING, Brocade ICX 7750, MISMATCH in PSU Air Flow direction.
Replace PSU with air flows in the same direction
You can use external labels as a guide. The power supplies and fan assemblies are labeled with an
airflow symbol on the faceplate to indicate whether the assembly takes in or exhausts air. The
symbol also appears on the top of the FRU. All FRUs in a chassis must have the same label affixed
so that airflow direction is consistent.
Figure 23 illustrates examples of the airflow labels.
FIGURE 23 Examples of airflow symbols