Garmin GNS 480, Installation Manaul

Page: 46 / 200

Installation Procedures
2-14 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual
Figure 2-5. Cam Lock Positioning
2.6.3 Unit Removal
To remove the unit from the mounting frame, turn the screw counter-clockwise with the hex driver to
unscrew the cam lock mechanism. The unit will begin to pull away from the mounting tube. Turn the
screw until slight resistance is felt and then pull the unit from the frame.
Do not exert excessive turning
force at the end of the cam lock travel or the unit may be damaged.
With the cam lock fully
disengaged, pull the unit straight out while holding onto the sides of the bezel. It is not recommended that
you pull the unit out by the rotary knobs. No special extraction tools are required if the mounting tube is
properly installed.
2.6.4 Unit Replacement
Whenever the GNS 480 is removed and reinstalled, verify that the GNS 480 unit power-up self-test
sequence is successfully completed and no failure messages are annunciated. If the unit was serviced or if
a different unit is being installed, accomplish the setup and configuration procedures defined in 3.2 prior
to verifying that the GNS 480 unit power-up self-test sequence is successfully completed and no failure
messages are annunciated. The setup items for a particular installation should have been previously
recorded on a Post-Installation Checkout Log that was completed upon initial installation (refer to Table
3-7).