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Alpine MRV-M500 Troubleshooting

This troubleshooting page will help you diagnose problems with the MRV-M500.

Sound Quality is Distorted

The sound quality from your speakers is muffled or distorted.

Faulty Speaker

Check for rips or tears on the face of the speaker. Any rips on the face of the speaker could cause the sound to become distorted. If the speaker seems intact, test it with another device to determine whether it is functioning properly. If the speaker fails to function, a replacement may be needed.

Incorrect Sound Settings

Check the dials on the back of the device labeled GAIN and LP FILTER. Make sure to check the dials associated with the channel that you are using. Try adjusting the dials and see if the sound quality changes.

Faulty Connections

Check to make sure all wires are securely connected and are not loose. You may need to check the connection ports on the device to be sure they are securely connected. If the ports are loose or seem faulty, you may need to replace them.

Amplifier Fails to Power On

The amplifier does not show any sign of powering on .

Blown Fuses

The device's fuses are located on the back of the device between the speaker output and the power supply. Use needle nose pliers to pull the fuses out of the device. Once the fuses have been removed, check the metal strip located on the inside of the fuse. If the metal strip is broken, the fuse has been blown and will need to be replaced.

Blown/Bulged Capacitors

Open the device up and search for large cylinders connected to the circuit board. If they are distorted, bulged or there is some liquid or residue around the capacitors, they will need to be replaced. To replace electrolytic capacitors, see this guide.

Faulty Circuit Board

Open up the device and remove the circuit board. Check the underside of the board for any locations where wires are touching one another. This may indicate a short circuit, in which case the circuit board will most likely need to bereplaced.

Indicator Light is Red

The indicator light on top of the amplifier is solid red.

Device is Overheating

Place your hand near the device, if it seems unnaturally hot, the device may be overheating. Make sure there is sufficient space and ventilation around the device and wait for it to cool down before attempting to power on again.

Amplifier Circuit Shorted

Open up the device and remove the circuit board. Check the underside of the board for any locations where wires are touching one another. This may indicate a short circuit, in which case the circuit board will most likely need to be replaced. For further instructions regarding removing and replacing the circuit board, see this guide.

Indicator Light is Blinking Red

The indicator light on top of the amplifier is blinking red.

Device is Overheating

Place you hand near the device, if it seems unnaturally hot, the device may be overheating. Make sure there is sufficient space and ventilation around the device and wait for it to cool down before attempting to power on again.

Audio Levels are Inadequate

The audio quality seems strange.

Settings are Faulty

Check the dials on the back of the device labeled GAIN, BASS EQ, and LP FILTER. Make sure to check the dials associated with the channel that you are using. Try adjusting the dials and see if the sound quality changes. Also, you may need to check the audio settings on the device which is providing the audio.

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