190-01878-02 GMA 342/345 Installation Manual
Rev. 5 Page 2-3
2.3.2 Additional Equipment Required
• Cables: The installer will fabricate and supply all system cables. Interconnect wiring diagrams are
detailed in Appendix C
.
• Hardware: #6-32 100° flat head screw (6 ea.) and #6-32 self-locking nut (6 ea.). Hardware
required to mount the GMA 342/345 installation rack is not provided.
• Stereo headphone jacks (up to 6), microphone jacks (up to 6), 3.5mm stereo jacks (up to 2).
Insulating type jacks or insulating washers should be used for all jacks to isolate them from aircraft
chassis.
• Tool: 3/32" Allen for tightening the unit into the rack and backplate.
• Push/Pull (that can be manually reset) circuit breaker (5 Amp recommended).
• Tie Wraps or Lacing Cord
• Ring Terminals (for grounding) #8 size, Yellow, Blue, and Pink.
• Silicon Fusion Tape (GPN 249-00114-00) to wrap the cable bundle.
• Solder Sleeves for terminating the shields of the cable to the GMA 342/345 backshell.
See 190-00313-09 for part numbers.
• Heat shrink tubing
• SD card needed for updating software in the GMA 342/345. Garmin recommends using a 4 GB
Sandisk® SD card.
Insulating Washers for Headset and Microphone Jacks can be found at the following suppliers:
Dallas Avionics
Digi-key
100053 - Shoulder Washer SC1147-ND - Shoulder Washer
100054 - Flat Washer SC1146-ND - Flat Washer
Mouser
Newark
502-S-1029 – Shoulder Washer S1029 - Shoulder Washer
502-S-1028 – Flat Washer S1028 - Flat Washer
Switchcraft
S1029 – Shoulder Washer
S1028 – Flat Washer
Table 2-6 Contents of GMA 342/345 Pre-bagged Screws “D” (011-02650-03)
Item Part Number Quantity
Screw, 4-40 x 0.250, PHP, SS/P, w/NYL 211-60234-08 4
Cable Tie, 4.0” 231-10001-00 1
Table 2-7 Contents of GMA 342 Sub-Assy, Audio Cables, 3.5mm RA (011-02412-00)
Item Part Number Quantity
Cable Assembly, Audio, 3.5mm to 3.5mm, Right Angle, 4 Pole Plug 320-00571-00 1
Cable Assembly, Audio, 3.5mm to 2.5mm, Right Angle, 4 Pole Plug 320-00571-01 1
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