Northern Airborne Technology AA83-001 rev.4.10 - Manual (Page 16)

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual
2.3.6
Setting Music Input Compatibility
The AA83-001 (S/N 1091and up) can be configured to be Low-Z or High-Z circuits by
two internal jumpers (J103 and J104), which can be accessed by removing the cover
and top PCB from the AA83-001. The AA83-001 is normally shipped from the
factory as a Low-Z version.
2.3.5.1 Jumper
Adjustment
Refer to Component Locator AA83\001\924-0 in Section 6 of the AA83-001
Maintenance Manual. If any further information is required, contact the Product Support
department at NAT Ltd.
Note: The AA83-001 is a static sensitive device. Use proper ESD handling procedures
when the cover is removed.
The two types of music inputs are configured by the position of jumpers J103 and J104,
located on the main PCB near the access hole for Q101. Music input type is
determined as follows:
Low Z/Walkman™ compatible J103 and J104 Installed
High Z/Pre-Amp compatible J103 and J104 Removed
To gain access to the jumpers, remove the cover from the AA83-001. Remove the top
PCB by removing three panhead screws and carefully lifting it straight up.
When reassembling the unit ensure the pins and connector are aligned properly before
screwing the PCB down.
2.3.7 Mechanical Installation
The AA83-001 can be installed in a vertical or horizontal attitude directly on the
instrument console, using the AA83-IKC Installation kit (see Section 2.5 for details).
Before the unit is mounted, make all functional tests and trimpot adjustments. Be sure
the harness has enough clearance to permit the unit to be dropped down for re-
adjustment, if needed later. Make sure unit is securely fastened to the panel, and that
the connector locks are tightened before any flight is attempted.
For proper installation, refer to the Drill Template (AA83\001\921-0) and the following
steps:
Note: The mounting nuts on the panel pots should not be removed at any time.
a)
After deciding the attitude (vertical or horizontal) of the unit, drill the required
mounting holes in the aircraft panel and insert the AA83-001 from behind the panel.
Page 2-4 Oct 20, 2004
ENG-FORM: 805-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.