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GNS 400W Series Maintenance Manual
Page 5-15
190-00356-05
Rev. A
5.4.6 Nav Chassis Cavity (Figure 5-9)
Nav Receiver Board (GNS 430W/AW)
Removal
1.
Separate Main Chassis from Nav Chassis.
2.
Remove RF Covers (1) and (2).
3.
Disconnect Ribbon Cable (3) connecting Nav Receiver Board and Glideslope Receiver
Board.
4.
Remove screw (4) and remove RF Cover (5).
5.
Unsolder the wire from Coax Connector (Detail A).
6.
Remove two screws (6) that attach 44-pin connector to Nav Chassis (7) and remove Nav
Receiver Board (8).
7.
Remove four screws (9) that attach Nav Receiver Board (8) to Nav Chassis (7).
Replacement
1.
Install two screws (6) and attach 44 pin connector to Nav Chassis (7) and install Nav
Receiver Board (8).
2.
Install four screws (9) and attach Nav Receiver Board (8) to Nav Chassis (7).
3.
Solder wire from Coax Connector (Detail A ).
4.
Install screw (4) and attach RF Cover (5).
5.
Connect Ribbon Cable (3) to Nav Receiver Board (8).
6.
Fasten Main Chassis to Nav Chassis.
Glideslope Receiver Board (GNS 430W/AW)
Removal
1.
Separate Main Chassis from Nav Chassis.
2.
Remove Glideslope RF Board Cover (9).
3.
Disconnect Ribbon Cable (3) from Glideslope Board (10).
4.
Unsolder Connector Wire from Coax Connector (Detail A).
5.
Remove three screws (11) that attach Glideslope Board (10) to Nav Chassis (7) and
remove Glideslope Board.
