NV30/NV40 Operations and Maintenance Manual Routine maintenance
Page 3-6 Issue 3.3 2014-12-10
Replacing the control/interface PWB battery
Replace the battery on the control/interface PWB (A1) once a year, or whenever the Controller -
Low Battery
alarm appears (on the AUI or via remote digital output). Chemical leakage from an old
battery can cause damage. Also, the control/interface PWB’s microcontroller may not retain its
settings if ac power is turned off while the backup battery power is low. The battery should be
replaced while ac power is applied to the transmitter.
Interval
Every 12 months.
Parts and tools
Replacement battery: 3 V lithium coin cell, 20 mm (Nautel Part # BBLT01, Panasonic # CR2032).
Procedure
Perform the following steps to replace the battery:
1. Ensure ac power is being applied to the transmitter.
2. Gain access to the control/interface PWB (A1) by opening the left-hand front door of the
transmitter.
3. Replace the battery in XBT1 on the control/interface PWB. See Figures MD-1 and MD-3 in
the mechanical drawings section at the end of the NV30/NV40 Troubleshooting Manual to
locate the control/interface PWB (A1) and its battery.
4. Close the left-hand front door.
5. Check for any alarms on the AUI. Battery related alarms should clear. (See “Viewing
transmitter status” on page 2-59.)
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