Alpine amp troubleshooting

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Sungura222

Member - Posts: 47

Joined: August 20, 2004

Location: United Kingdom

Posted: June 23, 2005 at 5:25 PM / IP Logged

Hi, Ive got an alpine MRV-T707 amp running an alpine sub.

When I was playing the music, the amp suddenly shut down and does not work anymore. The green LED still comes on on ignition/remote turn on, and then it becomes dim and stays dim. The sub does not play.

All power & ground connections are fine.

I've opened the back cover, but cannot see any apparent damage such as burn marks around components.

What could be possibly wrong? Can I repair it myself, or will I have to give it in to an authorised service centre.

Any feedback is appreciated.

Many thanks

Sun.

(;-)

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tcss

Silver - Posts: 1,623

Joined: June 07, 2004

Location: United States

Posted: June 23, 2005 at 5:50 PM / IP Logged

What type of sub(s) are you running? What is the ohm rating?

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Sungura222

Member - Posts: 47

Joined: August 20, 2004

Location: United Kingdom

Posted: June 24, 2005 at 3:58 AM / IP Logged

Hi,

Im running one alpine SWR - 1240 sub in bridged mode. the Ohm rating is 4 ohms

theres more than plent power from the amp.

I thinks its overheated, since the day it happened, it was extremely hot weather.

Do you think if I disconnect & reconnect the power supply, it may reset itself & start working? Sorry if it sounds silly, im assuming the thermal overload protection kicked in, and can only be reset by disconnecting the power supply.

Chess.

(;-)

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skoldspuppy

Silver - Posts: 342

Joined: July 11, 2004

Location: United States

Posted: June 24, 2005 at 8:55 AM / IP Logged

Humor me on this but check the amount of voltage comming from the Remote Turn on wire, make sure it read 12volts at all times and does not vary

The reason I say this is, my friends 301M Fosgate amp did the same and it turned out to be the Headunit's remote wire was falty, it would power up to only 4 volts, we switched it to the ACC wire and got a full 12 volts and the amp started working again

Now if you have already tried this, then im out of suggestions

Good Luck

--Skold

2004 Honda Civic Ex 4Dr

Kenwood DDX-7015/W Nav

4 Fosgate T152C

Hifonics Brutus BX1500D

RE XXX 12 in a 4 Cube Snail Shell

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Sungura222

Member - Posts: 47

Joined: August 20, 2004

Location: United Kingdom

Posted: June 24, 2005 at 9:12 AM / IP Logged

thanks skold,

it makes sense, since the amp is still turning on.

I will check for 12volts on the remote turn on wire

Thanks for your advice

chess (;-)

(;-)

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skoldspuppy

Silver - Posts: 342

Joined: July 11, 2004

Location: United States

Posted: June 24, 2005 at 9:27 AM / IP Logged

Make sure you do it when its under load, AKA still connected to the amp

We tested it from the connector at the headunit

Later

--Skold

2004 Honda Civic Ex 4Dr

Kenwood DDX-7015/W Nav

4 Fosgate T152C

Hifonics Brutus BX1500D

RE XXX 12 in a 4 Cube Snail Shell

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Alpine amp troubleshooting

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