Boston Acoustics GT-4100, GT-475 owner manual Amplifier Troubleshooting Guide

Amplifier Troubleshooting Guide

Status LEDs on Amplifier not Lit—Head Unit (Source) Turned “ON”

Verify Remote turn-on wire from source to amplifier has proper voltage

Power (B+) connections at amplifier, terminal blocks, and battery are secure Ground (GND) connections at amplifier and vehicle chassis are secure Battery B+ fuse and amplifier fuse are OK

B+ at battery and B+ at amplifier have proper voltage

Status LEDs Lit, no Output from Speakers—Speakers in Normal Operating Condition

Verify High-level cables from speaker(s) to amplifier are securely connected RCA cables from amplifier to source are securely connected Sensitivity adjustment on amplifier is correctly adjusted

Engine Noise from Speaker(s)

Turn source “OFF” and disconnect RCA cables at amplifier

If noise stops, check equipment and cables leading to amplifier

Verify RCA cables are of good quality with no breakage to internal shields

RCA cables from source to amplifier are not run alongside power

Amplifier Output Distorted—Music not Recorded with Intentional Distortion

Verify Source output to amplifier is not distorted

Amplifier input sensitivity is correctly adjusted

Amplifier Shutting Down, Red Blinking and Orange LEDs Lit—Amplifier in Thermal Protection Mode

Verify Amplifier is mounted with adequate air circulation around vents Amplifier does not have obstructions blocking back or side panel vents Amplifier is not mounted under carpet

Speakers meet correct impedance for application (mono or stereo hookup)

Amplifier not Turning “ON”, Orange LED Lit—Amplifier not Connected to a Shorted Speaker

Verify Speaker crossover is not defective

High-level cables from speaker to amplifier are not shorted

Amplifier not Turning And Both LED (s) Blinking—Speakers, Crossovers, and Cable OK

	Internal fuse needs to be replaced
Verify	Replace fuse with fuse of same value

Amplifier not Turning “ON”, Orange LED Lit—Speakers, Crossovers, and Cable OK

Amplifier requires service

If Service Seems Necessary

First, contact the dealer from whom you purchased the product, or contact us via e-mail at:

USA and Canada: support@bostona.com

Europe: support@bostona.com

Japan: ba_info@dm-holdings.com

Asia/Pacific countries: service@dm-singapore.com

We will promptly advise you of what action to take.

Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 USA

T: 978.538.5000 F: 978.538.5100 W: bostonacoustics.com

Boston, Boston GT, Boston Acoustics, and the Boston Acoustics logo are registered trademarks and DualMode and Q-Tune are trademarks of Boston Acoustics, Inc. Specifications are subject to change without notice. © 2008 Boston Acoustics, Inc. All rights reserved. Covered by patents issued and/or pending. 142-003179-1