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B KLN 94
Rev. 4, Jan/2003 10599I04.CDL Page 2-67
2.4 POST INSTALLATION CHECK OUT INFORMATION
2.4.1 Maintenance Pages
As part of every KLN 94 installation it is necessary to enter the Maintenance (MNT) pages in
order to configure the unit properly for the specific installation. Electronically configuring the units
replaces the need of installing strapping or configuration wires in the harness. This makes it
easier to configure the unit at the time of initial installation and also later on if changes are made
to the aircraft such as the later addition of a fuel management system, air data system, or
reconfigure from VFR to IFR.
This configuration data is stored both in the external configuration module (mounted in the back
plate of the mounting tray) and in memory internal to the KLN 94. When the KLN 94 is initially
shipped from the factory, the configuration data is set to the same default values/status in both
the external configuration module and the units internal memory. The initial defaults are specified
below. When the Maintenance pages are entered and changes made to the configuration data,
the changes are stored both in the external configuration module and the internal memory. If the
configuration data differs in the external configuration module from the units internal memory, the
external configuration module data is automatically used. Differences could occur if after
configuring the KLN 94 the initial unit was removed and a second unit inserted into the rack. For
example, if the KLN 94 is initially configured correctly and a loaner unit is later installed in the
aircraft, the external configuration module would ensure that the proper configuration data was
used. The external configuration module is part of the installation kit and should be utilized in
every installation to make sure that proper operation occurs regardless of the unit that may later
be inserted into the mounting tray.
To enter the Maintenance pages, the MSG button must be depressed before the unit is turned
and held. Hold the MSG button down and watch for a flash in the "Earth with Satellites" picture.
Continue to depress the MSG button for 10 seconds (+- 2 seconds) after the flash of the "Earth
with Satellites". During that 10 seconds, you will see the picture change from monochrome to
color. At the end of the 10 second period, release the MSG button for 1 second and momentarily
press the MSG button again. After about a 15 second period the "Earth with Satellites" picture
will change to a MNT Page. After entering the Maintenance pages if the configuration data is
different between the external module and the units internal memory, the following page is
displayed (this page will not be displayed if they are the same):
CONFIGURATION
1. Copy Module to Unit?
2. Copy Unit to Module?
Select: 1
OK?
If you wish to copy the configuration data from the external configuration module to the unit’s
internal memory or if you plan to manually change the configuration data, simply press the ENT
button.
If you wish to copy the configuration data from the unit’s internal memory to the external module,
turn the large outer knob counterclockwise to position the flashing cursor over the 1. Turn the
small inner knob to select a 2. Turn the large outer knob one step clockwise to position the cursor
back over the OK? and then press the ENT button.