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Operations Manual, HPA2, Compact Outdoor SSPA 205486 REV F 43
6.0 Introduction
This section describes some of the standard maintenance practices that can be performed
on the Compact Outdoor Amplifier.
6.1 Cooling System Maintenance
It is recommended that the cooling system be checked at least once per month. This
involves visually inspecting the fan intakes to make sure that there is no obstructions over
the intake. The Windows-based M&C program can be used to check the amplifier base
plate temperature. The base plate temperature should normally not exceed a 30°C to 35°C
rise above the current outside ambient temperature. If the base plate temperature exceeds
this temperature rise, it is one indicator that the system’s airflow requires maintenance.
The heat sink fins in the exhaust path can be visually inspected for excessive dirt and
debris buildup. If it appears there is excessive debris in the heat sink; the fan tray can be
removed for easy cleaning. Failure to keep the fans and heat sink clear of debris will
void your warranty.
6.2 Fan Removal
It is recommended to remove prime AC power from the amplifier when the fan tray is being
removed. However, if necessary, the fan tray can be removed while the amplifier is
operating. Caution should be used to make sure that no clothing or fingers are caught in
the fan blades. Simply remove the four screws from the fan tray and the fan assembly can
be removed from the bottom of the amplifier assembly.
The fans are connected to their power source by weatherized in-line circular connectors. A
replacement fan with connector can be provided for replacement. While the fan tray is
removed, the heat sink fins can be cleaned by spraying compressed air throughout the
finned area. A can of dust remover spray such as that which is found at a computer or
electronics shop will work fine.
Section 6: Maintenance
Figure 6-1: Fan Removal from Amplifier Assembly