AEM LSC22-003N Loudspeaker Controller Instruction Manual
- June 3, 2024
- AEM
Table of Contents
LSC22-003N Loudspeaker Controller
Instruction Manual
LSC22-003N Loudspeaker Controller
LSC22-003N Loudspeaker Controller ASM-LSC22 Installation and Operation Manual
Supplement
This supplement contains installation and operation information that is unique
to the LSC22-003N Loudspeaker Controller. Installation and operation
information common to the LSC22-001 base unit can be found in the ASM-LSC22
Installation and Operation Manual.
Section 1.0 Description
The LSC22-003N Loudspeaker Controller is identical to the LSC22-001 with the
following exceptions:
a) Changes to the faceplate text can be found by comparing Figure 1 to Figure
2. 
b) The LSC22-003N has NVIS Green A compliant backlighting.
c) The INT PA speaker level output is replaced by a mic level CABIN PA MIC
output.
| Cabin PA Mic Output | (CABIN PA MIC) |
|---|---|
| Quantity: | 1 |
| Circuit Type: | Single-Ended |
| Rated Level: | 250 mVrms ± 10% |
| Rate Load Impedance: | 600 Ohms ± 10% |
| Output Impedance: | ≤ 75 Ohms |
| Frequency Response: | ≤ 3 dB from 200 Hz to 6 kHz |
| Distortion: | ≤ 10% @ rated output |
| Audio Noise Level: | ≥ 60 dB from rated output |
d) A new discrete output EXT/INT outputs a ground when front panel EXT PA is selected.
| Ext/Int Discrete | (EXT/INT) |
|---|---|
| Quantity: | 1 |
| Rated Level: | Gnd (active low) |
| Output Active: | ≤ 1 Vdc |
| Sink Current: | 250 mA maximum |
e) Power switch function on the front panel is removed. When power is applied to the LSC22-003N, the unit is powered on without any other action.
Section 2.0 Installation
For installation information and drawings, see ASM-LSC22 Section 2.0. Select
the appropriate revision of the drawing for the serial number of the unit. The
drawings specific to this derivative are listed below and can be found at the
end of this supplement.
2.1 Installation Drawings
DOCUMENT
| REV.| DESCRIPTION| TYPE|
SERIAL NO.
---|---|---|---|---
Part No.
LSC22-003N-403-0| 1.10| Loudspeaker Controller| Interconnect| 93348 and up
LSC22-003N-403-0| 1.00| Loudspeaker Controller| Interconnect| 70938-93347
LSC22-003N-405-0| 1.00| Loudspeaker Controller| Connector Map| 70938 and up
LSC22-003N-922-0| 1.00| Loudspeaker Controller| Mechanical Installation| 70938
and up
Section 3.0 Operation
For operation information, see ASM-LSC22 Section 3.0 with the following
exceptions:
a) References to INT PA should now be referenced as CABIN PA MIC.
b) When the EXT PA/INT PA switch is set to the EXT PA position, a ground is
output on EXT/INT.
c) There is no front panel On/Off control in the detent position, unit is
always on with power applied. However, the physical detent position on the
control still exists.
Audio output remains at a minimum whether the volume knob is set ccw to the
detent or fully ccw into the detent position.
Message 3 and Siren audio programming now require the power input to the LSC22
be removed and is not dependent on the VOL knob position.
REVISIONS
REV| DESCRIPTION| DATE| BY
1.10| RAS #997 – MODIFY EQUIPMENT LIST FOR OBSOLESCENCE| AUG 24/21| DMF
LSC22-003N INSTALLATION NOTES
NOTES:
- ALL WIRES SHOULD BE 22 AWG UNLESS OTHERWISE SPECIFIED. ALL UNSHIELDED WIRE SHALL BE SELECTED IN ACCORDANCE WITH AC43.13-1B CHANGE 1, PARAGRAPHS 11-76 THROUGH 11-78. WIRE TYPES SHOULD BE TO MIL-W-22759 AS SPECIFIED IN AC43.13-1B CHANGE 1, PARAGRAPHS 11-85, 11-86 AND LISTED IN TABLE 11-11. ALL SHIELDED WIRE/CABLE SHOULD BE IN ACCORDANCE WITH MIL-C-27500.
- CABLE LENGTH NOT TO EXCEED 30 FT [9.14 1.1], UNLESS OTHERWISE SPECIFIED.
- CABLE LENGTH NOT TO EXCEED 1 FT [0.3 M].
- SYSTEM CROSSTALK MAY BE EFFECTED BY STYLE OF HEADSET AND JACK. CHECK SPECIFICATIONS AND SYSTEM REQUIREMENTS BEFORE SELECTING AND INSTALUNG.
- CABLE LENGTH NOT TO EXCEED 3.3 FT [1.0 MI
- SHIELDS SHOULD BE GROUNDED TO LOCAL AIRFRAME GROUND, UNLESS OTHERWISE SPECIFIED. SHIELD TERMINATION LENGTH NOT TO EXCEED 1 FT [0.3 M].
- REFERENCE SHEET 3 FOR AMPLIFIER WIRING CONFIGURATIONS.
- +26.5VDC SUPPUED AT 0.4 AMPS MAX.
- REFER TO LSC22 INSTALLATION & OPERATION MANUAL FOR OUTPUT LEVEL CONFIG SWITCH SETTING.
- APPLY GROUND TO REDUCE SPEAKER & EXT PA OUTPUTS BY 3DB.
- ONLY +28VDC LIGHTS OR +5VDC UGHTS MAY BE USED AT ONE TIME.
- PROVIDES GROUND IN EXT PA FRONT PANEL SWITCH POSITION.
DEFINTIONS
N/C: NO CONNECTION. THE PIN IS tat CONNECTED TO ANYTHING INTERNALLY, AND
THEREFORE SHALL HAVE NO CONNECTION EXTERNALLY.
N/C SPARE: NO CONNECTION INTERNALLY, BUT A SPARE WIRE SHALL BE INSTALLED
IN THE WIRE HARNESS.
RESERVED: MAY BE CONNECTED AND USED IN THE FUTURE. THE CIRCUITRY MAY BE
PRESENT OR ADDED TO ACTIVATE THE FUNCTION. THE PIN MAY BE USED FOR TEST
PURPOSES. THFRF IS NO FXTFRNAI CONNECTION
RESERVED SPARE: RESERVED, BUT INSTRUCTIONS SHALL BE FOLLOWED TO ACTIVATE
(RSV SP) THE CIRCUITRY. A SPARE WIRE 5HAI I BE INSTALLED IN THE WIRE
HARNESS.
LSC22-003N INSTALLATION NOTES
NOTES:
- ALL WIRES SHOULD BE 22 AWG UNLESS OTHERWISE SPECIFIED. ALL UNSHIELDED WIRE SHALL BE SELECTED IN ACCORDANCE WITH AC43.13-1B CHANGE 1, PARAGRAPHS 11-76 THROUGH 11-78. WIRE TYPES SHOULD BE TO MIL-W-22759 AS SPECIFIED IN AC43.13-1B CHANGE 1, PARAGRAPHS 11-85, 11-86 AND LISTED IN TABLE 11-11. ALL SHIELDED WIRE/CABLE SHOULD BE IN ACCORDANCE WITH MIL-C-27500.
- CABLE LENGTH NOT TO EXCEED 30 FT [9.14 1.1], UNLESS OTHERWISE SPECIFIED.
- CABLE LENGTH NOT TO EXCEED 1 FT [0.3 M].
- SYSTEM CROSSTALK MAY BE EFFECTED BY STYLE OF HEADSET AND JACK. CHECK SPECIFICATIONS AND SYSTEM REQUIREMENTS BEFORE SELECTING AND INSTALUNG.
- CABLE LENGTH NOT TO EXCEED 3.3 FT [1.0 MI
- SHIELDS SHOULD BE GROUNDED TO LOCAL AIRFRAME GROUND, UNLESS OTHERWISE SPECIFIED. SHIELD TERMINATION LENGTH NOT TO EXCEED 1 FT [0.3 M].
- REFERENCE SHEET 3 FOR AMPLIFIER WIRING CONFIGURATIONS.
- +26.5VDC SUPPUED AT 0.4 AMPS MAX.
- REFER TO LSC22 INSTALLATION & OPERATION MANUAL FOR OUTPUT LEVEL CONFIG SWITCH SETTING.
- APPLY GROUND TO REDUCE SPEAKER & EXT PA OUTPUTS BY 3DB.
- ONLY +28VDC LIGHTS OR +5VDC UGHTS MAY BE USED AT ONE TIME.
- PROVIDES GROUND IN EXT PA FRONT PANEL SWITCH POSITION.
DEFINTIONS
N/C: NO CONNECTION. THE PIN IS tat CONNECTED TO ANYTHING INTERNALLY, AND
THEREFORE SHALL HAVE NO CONNECTION EXTERNALLY.
N/C SPARE: NO CONNECTION INTERNALLY, BUT A SPARE WIRE SHALL BE INSTALLED
IN THE WIRE HARNESS.
RESERVED: MAY BE CONNECTED AND USED IN THE FUTURE. THE CIRCUITRY MAY BE
PRESENT OR ADDED TO ACTIVATE THE FUNCTION. THE PIN MAY BE USED FOR TEST
PURPOSES. THFRF IS NO FXTFRNAI CONNECTION
RESERVED SPARE: RESERVED, BUT INSTRUCTIONS SHALL BE FOLLOWED TO ACTIVATE
(RSV SP) THE CIRCUITRY. A SPARE WIRE 5HAI I BE INSTALLED IN THE WIRE
HARNESS.
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