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VS300 Operations and Maintenance Manual

Routine maintenance

Issue 0.1  2011-03-11

Page 3-5

Replacing the exciter/control PWB battery

Replace the battery on the exciter/control PWB (A1) once a year, or whenever the 

Controller - Low 

Battery 

alarm appears (on the front panel UI or via remote AUI). Chemical leakage from an old 

battery can cause damage. Also, the exciter/control 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 exciter/control PWB (A1) by removing the transmitter’s top cover. 

3. Replace battery BT1 on the exciter/control PWB. See Figures MD-1 and MD-2 in the 

mechanical drawings section at the end of the VS300 Troubleshooting Manual to locate the 
exciter/control PWB (A1) and its battery (BT1).

4. Re-install the transmitter’s top cover. 

5. Check for any alarms on the front panel UI or remote AUI. Battery related alarms should 

clear. (See 

.)