Question about Infinity 7540A Car Audio Amplifier

3 Answers

On and off

It was hitting a loud note and just cut out. i noticed that the power light blinked off and on and my speakers were moving in and out very slowly in opposite directions. i have a protect light and clip light and power light, and just the power comes on for a second, every five seconds and a bit of sound comes out. help please

Posted by on

  • nrh06002 Oct 22, 2008

    no just the power light blinks on every five seconds and it sound come out

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 19 Answers

Are the speakers that are moving oppositely in the same enclosure with no divider between them? If so (and assuming they were originally wired in phase properly), then one of them may be blown and causing the amp to short and go into thermal protect.

(In theory, with the power-on low-frequency "bump", the speakers should move in the same direction, so moving oppositely, if sharing the same airspace, could mean only one is working).

Unhook all speakers connected to the amp at the amp end, power up the system and see if the amp stays on with all power lights in their normal mode.

Posted on Dec 03, 2008

You need to confirm that the voltage on the B+ and remote terminals of the amp are remaining at or above 11v. Place the black meter probe on the ground terminal of the amplifier when measuring the voltage. Let me know what you find.

Posted on Oct 23, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 631 Answers

Are any lights on?

Posted on Oct 21, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Fan noise and blinking blue power light


green=power in motherboard.
blue=stand by.
yellow=memory powerd

Jun 13, 2013 | Gateway GT5622 PC Desktop

1 Answer

I was listening to music loud on my 5.1 speakers and they cut out. No sound, no lights to indicate it's even on. I did notice the fuse but took it out and it looks fine.


What has most likely happened, is that the speakers were over-powered and could not deal with the amount of sound. Or the other thing that would have happened, is that the fuse blew. If either of these is the case, the only solutiono is to purchase a new fuse for the speakers,(make sure you notice the voltage of the fuse - (find that on the original fuse itself.))
And after that, don't listenm to music that loudly again!

Aug 06, 2010 | Dell 5650 Computer Speakers

1 Answer

My infinity reference 7540a amp cuts in and out with heavy bass when the ''loud'' feature is on. I redid my ground, remote wire, shortened my power cable, and double checked all speaker connections. I dont...


sounds like ur gains are set to high and is going into protect mode

also what ive seen happen before is the speakers (if mounted in metal shelf or door and arnt bolted down correctly can flex under bass notes and flex the speaker that much the termanls short onto the metal and amp hits protect mode
(rare but worth a look if you think u have elimanted most other things Had a dude come to me when i was working in sydney with this problem )

also could be things like clipping protection , overheat protection ,amp drawing to much current from the alternator

do your lights dim when you hit the bass notes ?

get back to me and im sure we could solve this problem

Jan 22, 2010 | Infinity Reference 7541a Car Audio...

1 Answer

No Picture, Power light Blinking 3 times then repeats


3 times blink shows lamp cover is removed or not installed properly on TV.
Please take out lamp inside TV and check, seems its broken as you heard loud pop.
Thanks.

Aug 28, 2009 | Sony Grand WEGA KDF-55WF655 36" Rear...

2 Answers

When powered on protection light comes on


ya i would say its not grounded right

Mar 02, 2009 | Car Audio & Video

1 Answer

Speakers not working


DEFECTIVE AV BOARD GET IT REPLACED

Jan 25, 2009 | Olevia LT37HVS 37 in. LCD HDTV

1 Answer

On and off


Hi.
Take the input leads out of the amplifier for a start, but leave the power and remote cables connected.
See if it still turns on and off. If still faulty, you have probably blown a power transistor inside and the amp is shutting down when the output rises each time. It will almost certainly need looking at. Also make sure you are running into the correct impedance load. If you have hooked up too many speakers you will cause damage.

Mark

Oct 21, 2008 | Infinity 7540A Car Audio Amplifier

1 Answer

Power supply malfunction?


Remove the battery and try the cord again. Complete with the moving it around. It sounds like you have already diagnosed the loose DC plug adaptor, but the battery could have gone terminal.

Apr 17, 2008 | HP Compaq Presario V2000 Notebook

Not finding what you are looking for?
Infinity 7540A Car Audio Amplifier Logo

149 people viewed this question

Ask a Question

Usually answered in minutes!

Top Infinity Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

4766 Answers

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22011 Answers

Are you an Infinity Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...