LSC22 Loudspeaker Controller
ASM-LSC22 Installation and Operation Manual
January 24, 2017 Rev: 1.00
Page 2-2
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
2.3.3
Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer's Maintenance Instructions
or AC43.13-1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify to MIL-W-
22759 as specified in AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11. For
shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves (for shield
terminations) to make the most compact and easily terminated interconnect. Follow the interconnect
drawing in
Section 2.7 as required.
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
Section 2.7 for shield termination details.
Aircraft
harnessing shall permit the unit to be removed for easy access to all adjustments.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers
Maintenance Instructions.
Unless otherwise noted, all wiring shall be a minimum of 22 AWG, except power, ground, and internal pa
speaker lines, which shall be a minimum of 20 AWG. Reference 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.
Power to this unit must be supplied from a separate circuit breaker or fuse (fast blow), and not attached to
any other circuit breaker without additional protection. Verify that the selected circuit breaker size and wire
gauge are adequate for the installation using the techniques specified in AC43.13-1B Change 1,
Paragraphs 11-47 through 11-51 and 11-66 through 11-69.
2.3.4
Post-Installation Checks
Ensure all connectors are tight and the mechanical installation is sound.
2.3.4.1
Voltage/Resistance Checks
Do not connect the LSC22 to the wiring harness until the following conditions are met.
Check the following, refer to Section 2.7 for complete wiring details:
a) Check P101 pins 1, 2 for +28 Vdc relative to ground.
b) Check P101 pin 4 for continuity to chassis ground (less than 0.5
).
b) Check P101 pins 14, 15, 16 and P102 pin 6 for continuity to ground (less than 0.5
).
c) Check P101 pin 3 for 28V lighting voltage relative to ground or P102 pin 1 for 5V lighting voltage
relative to ground.
2.3.4.2
Power On Checks
Power up the aircraft’s systems and confirm normal operation of all functions of the LSC22. Refer to Section
3 (Operation) for specific operational details.
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.
