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% B. Install the NAV/COM unit or NAV/COM/GPS unit

Detail Steps/Work Items  Key Items/References 
(1)  Remove the protective covers from the connectors on the rear of the unit. 
(2)  Slide the unit into the rack. Engage the locking screw so that the lobe of the front latch touches the rack. 
(3)  Turn the locking screw so that the rear lobe engages the mounting rack.  Refer to Figure 2 (KX 125), Figure 3 (KX 155A/165A), Figure 4 (GNS 430) or Figure 5 (GNS 530). 
CAUTION: DO NOT OVER-TIGHTEN THE LOCKING SCREW. YOU CAN DAMAGE THE LOCKING MECHANISM. 
(4)  Continue to turn the locking screw until the unit is fully installed in the mounting rack. 
(5)  Close the related circuit breaker(s).  NAV/COM circuit breaker for the NAV/COM unit. COM and NAV/GPS circuit breakers for the COM/NAV/GPS unit. 
(6)  Do a function test of the system.  Refer to Paragraph 8. 

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Communications
AMM

DA 40 Series

%  3. Configuration of the Garmin COM/NAV/GPS GNS 430 
%  You must configure the unit after replacing it. 
%  A. Configuration Mode Operation 
%  With power applied to the avionic rack and the GNS 430 unit turned off, press and hold the ENT 
%  key and turn the unit on. Release the ENT key when the display activates. After the data base 
%  page, the first page displayed is the MAIN ARINC 429 CONFIG page. While in Configuration 
%  Mode, pages can be selected by ensuring the cursor is off and rotating the small right knob. 
%  To change data on the displayed Configuration Page, press the small right knob (CRSR) to turn 
%  on the cursor. Turn the large right knob to change between data fields. Turn the large or small right 
%  knob to change a field that the cursor is on. Once you have made the desired selection, press the 
%  ENT key to accept the entry. 
%  The Configuration Pages described on the following pages are in the order found when rotating the 
%  right small knob starting at the MAIN ARINC 429 CONFIG page. 
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Detail Steps/Work Items  Key Items/References 
(1)  Select the following configuration on the MAIN ARINC 429 page: SPEED DATA IN 1 Low Off IN 2 Low Off OUT Low Off SDI Common 
(2)  Select the following configuration on the MAIN RS232 CONFIG page: INPUT OUTPUT CHAN1 Icarus-alt Off CHAN2 Off Off CHAN3 Off Off CHAN4 Off Off 
FUEL TYPE AV gas 
(3)  No adjustments necessary on the MAIN INPUTS 1 and MAIN INPUTS 2 page. 

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Detail Steps/Work Items  Key Items/References 
(4)  Select the following configuration on the MAIN LIGHTING page: DISPLAY KEY LIGHTING ------SOURCE PHOTO PHOTO RESPONSE TIME 3 4 SLOPE 40 50 MINIMUM 250 40 OFFSET 40 50 
　
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