JA95-060 Audio Controller - Five Transceiver - Expander
Installation and Operating Manual
Rev A
Page 6
Allow 3” from the end of the shielded wiring to the shield termination to allow the connector hood to be easily installed.
Refer to the Interconnect drawing in Appendix A of this manual for shield termination details. Note that this unit has a
‘clamshell’ hood that is installed after the wiring is complete.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturer’s maintenance
instructions.
Unless otherwise noted, all wiring shall be a minimum of 24 AWG, except power and ground lines, which shall be a
minimum of 22 AWG. Refer to the Interconnect drawing for additional specifications. Check that the ground
connection is clean and well secured, and that it shares no path with any electrically noisy aircraft accessories such
as blowers, turn-and-bank instruments, or similar loads.
2.4.3
Mechanical Installation
The JA95-060 can be mounted in any attitude and location with adequate space for the front panel and sufficient
clearance for the connector and wiring harness. It requires no direct cooling.
2.4.4
Legend Replacement
The JA95-060 illuminated legends are field replaceable. For further information, refer to the
document in Appendix A of this manual.
2.4.5
Post Installation Checks
2.4.5.1
Voltage/Resistance checks.
Do not attach this unit until the following conditions are met:
a) Check P1 pin
19
for lights buss voltage.
b) Check P2 pin
17
for +28 Vdc or +14 Vdc relative to ground.
c) Check P2 pin
34
for continuity to ground (less than 0.5
Ω
).
d) Check all pins for shorts to ground or adjacent pins.
2.4.5.2
Configuration
Ensure that the JA95-060 contains the correct configuration settings. This may be done at the factory, on the
maintenance bench or in the aircraft before the power on checks are performed. Refer to section 2.5.1.
2.4.5.3
Power on Checks.
Power up the aircraft’s systems and confirm normal operation of all functions of the JA95-060. Refer to
Section 3 (Operation) for specific operational details.
a) Confirm radio operation for both receive and transmit. Check yoke or cyclic switch action. Check the radio
selection and inputs. Do not proceed until the radios are functioning correctly.
b) Unusual buzzes, hums or other background audio are symptomatic of multiple grounds, or noisy external
systems such as blowers or pumps sharing wiring with the audio system. If a transmitter fails to key or
correctly modulate it is often the result of not connecting all required grounds to the radio or external audio
system.
c) Check the Emergency operation.
d) Check that all configurations settings are correct.
When all performance checks are satisfied, complete the necessary regulatory documentation before releasing the
aircraft for service. Refer to
2.5
Adjustments and Configuration using ProCS™
All the JA95-060 internal adjustments are set from the
Product Configuration Software ProCS™
. Configuration data is
sent to the JA95-060 via the front panel connector (io), using the Configuration Cables and a computer running the
ProCS™ software. For configuration requirements, see section 2.5.1.