Garmin Apollo CNX80, Installation Manual

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Periodic Maintenance
Apollo CNX80 Installation Manual 560-0982-00 Rev D
6-1
6 P
ERIODIC
M
AINTENANCE
6.1 E
QUIPMENT
C
ALIBRATION
No scheduled servicing tasks are required on the Apollo CNX80. The Apollo CNX80 design requires
no
internal manual adjustments.
6.2 VOR C
HECKS
Even though the CNX80 is designed to utilize the most state-of-the-art DSP technology and maintain a very
high accuracy and repeatability record, it still must undergo the VOR accuracy check required for IFR
flight. Refer to CFR 14 paragraph 91.171. Every 30 days verify the limits of the permissible indicated
bearing error.
The last VOR check information may be entered into the CNX80 via the Nav VOR Mode then on the Test
Log Menu page.
6.3 C
LEANING
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.
6.4 B
ATTERY
R
EPLACEMENT
The CNX80 includes an internal battery that will last about 10 years. The battery is used for internal RAM
memory and GPS system information. Regular planned replacement is not necessary. The CNX80 will
display a "low battery" 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 CNX80 will remain fully operational, but
the GPS signal acquisition time will be increased. This acquisition time can be reduced by entering a new
seed position each time the unit is powered on. There is no loss of function or accuracy of the CNX80 with
a dead battery.
The battery is not user replaceable. To replace the battery, contact the Garmin AT repair station or factory
authorized repair station.
6.5 D
ISPLAY
B
ACKLIGHT
The display backlight is rated by the manufacturer as having a usable life of 20,000 hours. This life may be
more or less than the rated time depending on the operating conditions of the CNX80. Over time, the
backlight will dim and the display will not perform as well in direct sunlight conditions. The user must
determine by observation when the display brightness is not suitable for its intended use. Contact Garmin
AT repair station or factory authorized repair station when the backlight requires service.