Page 202 2
nd
Edition – Rev 0
23 – 10
COMM 1 and 2 – MANTEINANCE PRACTICE
2. GNS 430W / 530W periodic maintenance
Repair of the unit is on condition of failure. There are no periodic maintenance requirements
or scheduled equipment calibration. At regular intervals the following can be performed:
Cleaning
The front bezel, keypad, and display can be cleaned with a soft cotton cloth dampened with
clean water. DO NOT use any chemical cleaning agents. Care should be taken to avoid
scratching the surface of the display.
Battery Replacement
The 430W unit includes an internal battery that will last 5 to 8 years. The battery is used for
internal time clock and GPS system information. Regular planned replacement is not
necessary. The 430W unit will display a “Low Battery” and “Unit Needs Service” message
when replacement is required. Once the low battery message is displayed, the battery should
be replaced within 1 to 2 months.
If the battery is not replaced and becomes totally discharged, the 430W unit will remain fully
operational, but the GPS signal acquisition time will be increased. There is no loss of function
or accuracy of the 400W Series unit with a dead battery.
The battery is not user replaceable.
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