REV. 1 August 17, 2004
13
SECTION 4 POST INSTALLATION CHECKOUT
4.1
PRE INSTALLATION TESTS
With the MD41-( ) disconnected, turn on the avionics master switch and verify that aircraft power
is on pin 13 for. Using an ohm meter, verify pin 25 is aircraft ground.
4.2 OPERATING
INSTRUCTIONS
Turn off the avionics master switch and connect the mating connector to the MD41-( ). Turn on
the avionics master switch and the MD41-( ) should come on with the following annunciations.
1.
NAV or GPS
2.
MSG may be flashing depending on the status of the GPS receiver.
Press the lamp test button (if installed), all annunciations should light. Continue pressing the lamp
test button and cover the photocell window located in the center of the front panel. All
annunciations should dim.
Annunciation brightness at the minimum dimming level may be adjusted by rotation of the
dimmer control located on the bottom of the MD41-( ) case. CW rotation lowers the dimming
level.
Refer to section 3 of the GNS 480 (CNX80) installation manual for testing of external
annunciations.
4.3 CONTINUED
AIRWORTHINESS
No periodic maintenance or calibration is necessary for continued airworthiness of the
MD41-( ).
