Northern Airborne Technology MB01 - Manual (Page 9)

MB01-001Matching Box
SM72 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 4 Page 2-3
Check the following for Receiver Subassemblies:
a) Check P103, pin <4> for continuity to ground (less than 0.5
Ω).
b) Check P106, pin <4> for continuity to ground (less than 0.5
Ω).
Check the following for Test Subassembly:
a) Check P107, pin <1> for continuity to ground (less than 0.5
Ω).
2.4.4.2 Power On Checks
Power up the aircraft’s systems and confirm normal operation of all functions of the MB01-001. Refer to
Section 3 (Operation) for specific operational details.
a) Check preset adjustments are completed before aircraft departure.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
2.5 Adjustments and Connections
The unit is shipped from the factory with all internal adjustments set to the normal test levels. Once
installed in the aircraft, it may be desirable to change some of these settings to best suit the local
operating environment. The internal adjustments are located through the top cover. See Figure 1.
Figure 1: Internal Adjustments
All microphone, receive and artificial sidetone adjustments are 10-turn trimpots. The dedicated sidetone
inputs are not adjustable.
ENG-FORM: 805-0117.DOT
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