User's Manual

14
To be used only for the purpose for which it is submitted. All rights reserved to AMDS LLC. Reproduction without written
consent is prohibited.
AMDS CONFIDENTIAL
The system provides for local visual (BATTERY FAILURE) and remote
indication the system output voltage has fallen below a preset level. This
level is set at the factory at 24V. The alarm clears automatically when the
system output voltage increases above this level.
The Low Voltage Alarm is the final indication that the TGB system is about to
shut down. Once asserted the TGB will shutdown in approximately 8 hours
unless commercial AC power is restored..
4. Maintenance
4.1. General
The TGB is designed to require minimal maintenance. Care should be taken
to observe the appropriate precautions when working inside the TGB
enclosure.
!!! The circuit cards used in this equipment contain static sensitive
devices. Observe precautions for handling ESD sensitive items. A, ESD
wrist strap is located inside the front door of the TGB enclosure.
4.2. Preventative or Routine Maintenance
4.2.1. Surge arrestor
The antenna surge arrestor is of the gas discharge tube type. A gas tube
element may not always show outward signs of failure or degradation,
therefore routine maintenance and inspection is recommended. The gas
tube element can be replaced by simply removing the nut and replacing
the element. If the number of thunderstorms in an area is high, gas tubes
should be inspected more frequently. Gas tube degradation is dependant
on the number of strikes as well as the intensity of the strikes. As obvious
as it may seem, gas tube elements should never be inspected, or
replaced, when a thunderstorm is approaching or occurring.
4.2.2. Airflow
Without adequate airflow, TGB performance may degrade due to
increased temperature. At least once per year, the TGB enclosures
should be checked for proper airflow. This includes verifying operation of
all fans and ensuring that any air filters are free of dust and dirt.
4.3. Circuit Card Installation/Replacement
No operator or user serviceable equipment is provided in the TGB with the
exception of battery replacement and other housekeeping items.
IF ANY HARDWARE OR SOFTWARE FAILURE IS REPORTED OR
DETECTED SERVICING IS TO BE PERFORMED BY QUALIFIED AMDS
TECHNICAL SERVICE PERSONNEL ONLY!!