Honeywell bendis king KLN 94, Maintenance Manual

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BENDIX/KING KLN 94
Rev 0, Sept/2000 15599M00.JA Page 5-1
SECTION V
MAINTENANCE
5.1 INTRODUCTION
This section contains the test, alignment, troubleshooting and disassembly/assembly procedures
for the KLN 94. Before maintenance is attempted, it is advisable to have a thorough understand-
ing of the Theory of Operation.
5.2 TEST AND ALIGNMENT
The final test procedure of section 5.2.4 shall be followed to determine if the KLN 94 is operating
properly. If it is not, the troubleshooting procedure of section 5.4 and/or the alignment procedure
of section 5.2.3 should be followed to bring the unit up to the Minimum Performance Specifica-
tions. Refer to
Figure 5-1 for a suggested test set up.
5.2.1 TEST EQUIPMENT REQUIRED
The following equipment, or equivalent, is required to properly align and test the KLN 94. All test
equipment should be calibrated before alignment is attempted.
A. Power Supply
Sorensen SRL 40-6 or equivalent
B. Voltmeter
Fluke 800A or equivalent
C. Frequency Counter
HP5335A or equivalent
D. Computer
IBM compatible 80286 or above
E. Oscilloscope
Tektronix 465 or equivalent
F. Test Harness (Customer Fabricated. See Figure 5-1 )
PC Interface Kit P/N 050-03612-0000
KLN 94 Installation Kit P/N 050-03321-0000
G. KA 91/KA 92 GPS antenna or equivalent
H. GPS Simulator
Welnavigate GS-100 or equivalent
I. KTS 143 Test Fixture, KI 229 or equivalent
J. OBS Resolver Test Set (See Service Memo 105)
P/N 050-01571-0001
5.2.2 STANDARD GPS TEST SIGNAL DESCRIPTION
A standard GPS test signal is described as the “off-air” reception of more than two satellite signals,
which produce an “Sg” of greater than 4, and “Hlt” of “GD”.
5.2.3 ALIGNMENT PROCEDURE
The alignment procedure is written for a KLN 94 that is either newly constructed or recently over-
hauled. If partial alignment is desired, use only the initial control settings that apply to the section
being aligned.
Alignment of the KLN 94 must be performed with all system circuit boards in place, or with suitable
loads in place.