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3-3
Rev 1
3.2 TURN-ON AND SELF TEST
Enough of the preliminaries. Let’s get started into actu-
ally turning the KLN 90B on and using it! Figure 3-2 will
fold out and allow you to use it as a reference as you read
this chapter, especially if you don’t have a KLN 90B
immediately at hand. The steps below take a lot of words
to explain, but you will find that in actual use you will
accomplish these steps in just a few moments.
NOTE: When power is applied to the KLN 90B it always
“wakes up” in the Enroute-Leg mode. Only the Enroute-
Leg mode is described in this chapter. In this mode the
KLN 90B performs great circle navigation (the shortest
distance between two points located on the earth’s sur-
face). The course deviation output displayed on the unit’s
internal course deviation indicator (CDI) and provided to
an external HSI or CDI is five nautical miles left and right,
full scale sensitivity. The other modes of the unit are
described in section 5.9 and in chapter 6.
1.Turn-on the KLN 90B by pressing the power/bright-
ness knob to the “in” position. The power/brightness
knob is located on the upper right side of the unit. It
takes just a few seconds for the screen to warm up.
2.The Turn-On page will be displayed for a few sec-
onds (figure 3-3). During this time the KLN 90B per-
forms an extensive internal test. The ORS
(Operational Revision Status) level number in the
upper right corner of the display should match the
ORSlevel indicated on the first page of this Pilot’s
Guide (page before Table of Contents). If desired,
you may program four lines of personalized informa-
tion which is displayed each time the Turn-On page is
in view. The procedure for doing this is described in
section 5.7.
When the internal test is complete, the Turn-On page
will automatically be replaced by the Self Test page
(figure 3-4). Note: if the KLN 90B is operating in the
take-home mode, the Take-Home Warning page (fig-
ure 3-5) is displayed first and must be acknowledged
by pressing
E. See section 5.14 for more informa-
tion on the Take-Home mode.
3.Adjust the display brightness to the desired level by
rotating the power/brightness knob. Clockwise rota-
tion increases brightness and counterclockwise rota-
tion decreases brightness.
4.Verify that the data displayed on the left side of the
Self Test page is the same as is being displayed on
the appropriate equipment in the aircraft which is
interfaced to the KLN 90B. If the KLN 90B is not con-
nected to any other equipment in the aircraft, you
may skip to step 5.
GPS ORS 20
c1994 ALLIEDSIGNAL INC
SELF TEST IN PROGRESS
DIS 34.5NM|DATE/TIME
+++++j+‚⁄++| 31 JUL 94
OBS IN 242^|08:10:03CST
OUT 315^|ALT 1100ft
RMI 130^|BARO:29.92"
ANNUN ON| APPROVE?
enr-leg CRSR
4
WARNING:
SYSTEM IS IN TAKE-
HOME MODE: DO NOT
USE FOR NAVIGATION
ACKNOWLEDGE?
enr-leg ent
Figure 3-3
Figure 3-4
Figure 3-5