Garmin GPS 150 User Manual download pdf (Page 80)

Maintenance

The GPS 150 is built to exacting standards and does not require user

maintenance. Should the faceplate and lens require cleaning, use a soft cloth and

non-abrasive cleaner.

The user data is maintained by an internal battery with a projected life of 3 to 5

years. If the GPS 150 detects a low memory battery, you will be informed with the

message ‘Memory battery low’. Failure to have the battery replace may result in loss

of data each time you turn your unit off. This will GREATLY increase satellite acquisi-

tion time and no user data will be saved. This condition will be accompanied by the

message ‘Stored data lost’.

The GPS 150 contains a crystal oscillator, which may drift after many years of

operation. If the unit detects excessive oscillator drift, you will be informed with the

message ‘Osc needs adjustment’. When this occurs, contact an authorized GARMIN

service center for service. Failure to do so may result in severely degraded

acquisition performance.

APPENDIX B

GPS 150 Maintenance

150man rev E 7/24/98 3:11 PM Page 70

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Garmin GPS 150 User Manual Page 80