Maintenance; General; Replacement Of Components - CommScope Node AM4 Manual

5. Maintenance

5.1. General

Read and observe chapter 1.2.
Caution: The unit reaches high temperature in operation. Risk of burns by hot
surface. Do not touch the unit before it has sufficiently cooled down.

Notes:
 The Node AM does not require any preventative maintenance measures apart from
the Battery Backup Unit (BBU). It is recommended to replace it after 4 years of
operation (see chapter 4.3.6).
 We recommend checking the cleanliness of the unit and in particular of the fan unit at
appropriate intervals depending on the degree of dust and dirt at the installation site. If
necessary, any dusty or dirty areas / parts should be cleaned at regular intervals, which
also depend on the degree of dust and dirt at the installation site.
For cleaning, the following procedure is recommended: use an industrial vacuum
cleaner and, first, vacuum the outside of the unit. For inside cleaning, remove all plug-
in units (as well as the fan unit) according to the instructions in the following chapter,
and then, vacuum the fan unit, the cooling fins of the plug-in units as well as the
complete interior of the Node AM.
 In the event of a malfunction, the user should check the status of the antennas, feeder
cables, connectors, and mains power before replacing any components.
 When sending back the unit, use an appropriate packaging; see chapter 7.3. We
strongly recommend using the original packaging. The transport protection cover (see
chapter 3.1.3) should also be installed for units with bottom type fan unit (see chapter
5.2.7.2). For a better shock protection of the DC connectors and main board the RF
cards must be packed separately.

5.2. Replacement of Components

Read and observe chapter 1.2.
Maintenance of the Node AM should be performed on a field replaceable unit (FRU) basis
only. Do not damage the warranty labels on the components as this voids the warranty.
Unless otherwise agreed to in writing by CommScope, CommScope's general limited
product warranty (http://www.commscope.com/Resources/Warranties/) shall be the
warranty governing the Node AMs, including the installation, maintenance, usage and
operation of the Node AMs.
The spare parts list contains only units that can be replaced without tuning or soldering
work. It is not recommended to replace any components inside the Node AM itself,
except, RF cards, combiner, and modem. Regarding the replacement of a PSU observe
the corresponding Note in chapter 5.2.5.

Defect parts should only be replaced by original parts from the supplier. All
Note:
interventions inside the housing are at one's own risk.
Page 52 MF0121ACP_uc.docx
5. Maintenance
Manual for Node AM4