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PRODUCT MANUAL

2.6

Mounting Hardware

Max intrusion into enclosure = .375"

(8) 10-32 x .375" screws included with product

Note: The screws must always be installed whether utilized for mounting or not. They

are required to complete the acoustic sealing of the enclosure.

3.0

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS

3.1

Periodic Maintenance

No periodic scheduled maintenance or calibration is required for continued airworthiness

of this product. If the unit fails to perform to specifications, it must be removed and

serviced by a qualified service facility.

4.0

TROUBLESHOOTING

4.1

Basic Troubleshooting

Problem

No Sound

Distorted Sound

Poor Audio Quality

Noise in Audio System

Sterling, MA 01564

No output from Audio Amplifier

Wiring / connection problem

Audio output from source unit is

distorted

Loudspeaker Membrane Damage

Audio source unit controls are

improperly adjusted

Speakers are improperly installed

Vibration in aircraft fixture, grill, or

panel

Figure 4: Basic Troubleshooting

Size

Cage Code

Doc Type

4MSE6

Possible Cause

Drawing Number

106511-289-4A0001PM

ASW-289

Possible Solution

Ensure Audio amplifier is

providing audio signal to

loudspeaker

Ensure continuity between

amplifier and loudspeaker on

both terminals

Verify that the source unit output

has a clean undistorted signal

Inspect the Loudspeaker

membrane to insure there is no

damage and no debris is lodged

in front of the membrane

Adjust controls on audio source

unit for desired sound

Verify installation of speakers to

manufacturer specifications

Use Alto Test CD to play sweep

tones through the system.

Identify loose panel or hardware

that might be rattling and secure.

Rev #

Date

11/02/20

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