NV30/NV40 Operations and Maintenance Manual Routine maintenance
Issue 3.3 2014-12-10 Page 3-1
Section 3: Routine maintenance
This section provides instructions for performing routine maintenance on the NV30/NV40
transmitter. This section includes the following topics:
• Scheduled maintenance
– Cleaning
– Checking hardware - see page 3-2
– Battery replacement - see page 3-2
• Replacing an air filter - see page 3-3
• Performing on-air checks - see page 3-5
• Replacing the control/interface PWB battery - see page 3-6
• Replacing the NVE exciter PWB battery - see page 3-7
• Inspecting lightning protection systems - see page 3-8
Scheduled maintenance
Scheduled maintenance consists of performing a visual inspection of the NV30/NV40 at scheduled
intervals. The recommended minimum time between scheduled maintenance visits is three months.
Local operating and environmental conditions may dictate more frequent visits, while in remote sites
less frequent visits may be acceptable. Experience and system reliability will determine the most
practical schedule for a specific installation.
Cleaning
At a minimum, follow the cleaning procedures listed below.
1. Check the air filters, noting there are six in the back of the transmitter and one in the front
door of the transmitter. Remove the air filters, inspect them, then re-install the air filters if
they are clean. If an air filter is dirty or damaged, replace it as soon as possible. See
“Replacing an air filter” on page 3-3.
Note:
A site located in a dirty area using open-air cooling requires more extensive cleaning than a site
located in a clean area using closed-air cooling.
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