Page 202 2
nd
Edition – Rev 0
34-20
POSITION DETERMINING – MAINTENANCE PRACTICES
2. GNS 430W PERIODIC MAINTENANCE
No scheduled servicing tasks are required on the 430W unit. 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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