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3 INSTALLATION PROCEDURE
3.1 Unpacking Unit
Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred
during shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the
original shipping container and all packing materials. Do not return the unit to Garmin until the carrier has
authorized the claim.
Retain the original shipping containers for storage. If the original containers are not available, a separate
cardboard container should be prepared that is large enough to accommodate sufficient packing material to
prevent movement.
3.2 Wiring Harness Installation
Allow adequate space for installation of cables and connectors. The installer shall supply and fabricate all
of the cables. All electrical connections to the GSU 75 ADAHRS are made through one 78-pin d-sub
connector (see
Figure
connector
(Figure
4-2). Connector detail is shown in
Section 4
defines the electrical characteristics of all input and output signals. Required connectors and
associated hardware are supplied with the applicable connector kit (Refer to
for examples of interconnect wiring diagrams. Construct the actual harnesses in accordance with aircraft
specific approved interconnect diagrams.
Manufacturer
Garmin P/N
Military P/N
CAUTION
Check wiring connections for errors before inserting connectors into the GSU 75
or GMU 44 pigtail. Incorrect wiring could cause internal component damage.
Manufacturer
Garmin P/N
Military P/N
190-01639-00
Rev. 6
The document reference is online, please check the correspondence between the online documentation and the printed version.
4-1). Connections to the GMU 44 Magnetometer are made through a 9-pin
Table 3-1 GSU 75 Pin Contact Part Numbers
Table 3-2 GMU 44 Pin Contact Part Number
Figure
3-2.
Section
78 pin D-Subminiature connector (P751)
22-28 AWG
336-00021-00
M39029/58-360
9 pin connector
20-24 AWG
336-00022-00
M39029/63-368
GSU 75 ADAHRS Installation Manual
2.3). See
Appendix B
Page 3-1
340095
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