Question about Altec Lansing ACS 251 Computer Speakers

2 Answers

Power problem the power to my speakers keeps going off then back on in abought ten minutes any ideas ?? switch or relay inside?

Posted by on

  • mike halls Jun 05, 2007

    not moving speakers, main power supply not battery,no loud button on speakers.



2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

Even though you aren't moving the speakers, it's probably a loose connection on the power jack, try wiggling the cord on both ends to see if you can make the speakers act up.

Posted on Jun 21, 2007


Are you movimg the speakers when thay go off ??? Are you on mains power or battery Do thay go off when loud sound is on???

Posted on Jun 05, 2007


1 Suggested Answer

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Chevy trailblazer 2005 LS does not have the

No, just one relay. You only get porew to the relay from the ignition when you try to start it. The ECM grounds the relay to let power go to the starter. Do a rest for the security. Ten minutes on, thirty seconds off. This should turn the security light off. There is also a relearn procedure. It is three times the reset. Don't try to start it until after you turn it off the third time.

Oct 19, 2014 | Cars & Trucks

1 Answer

Bizhub 751 c 3803

Turn off the main both power switch one located inside the front door, second on the control panel, then wait ten seconds. then turn on main inside first. Then holding down the utility/counter button turn the sub power switch on. You must keep the utility button down The screen will show TROUBLE RESET touch it see OK then power off. YOU MUST WAIT TEN SECONDS BEFORE POWERING UP AGAIN!!!!!! If the problem goes away OK. If the code comes back you need a Fusing unit check. Have a qualified tech look at it. :( DO NOT KEEP TRYING TO RESET THE MACHINE THE MACHINE IS TELLING YOU THERE IS A PROBLEM!!!!! Fire could occur that would ruin a perfectly good day!!!!

Jan 08, 2014 | Minolta bizhub 350 Black and White Copier

1 Answer

Sony amplifier protect mode

The protect mode setup provided to protect the speakers against burning due to the amp output short circuit. protecter activated means one or more channels of the O/Pamp is short circuited(defective) in your amplifire . First of all Remove the Power cable from the Amplifier and make sure no power connected to the Amp.
1.First step identify the faulty O/P Amp Channel---------
Inside the Amp you will see Five O/P Amp Sections (all are looking similar this is the common idea to locate the O/P Amps) there will be ten power transistors fitted on heatsink (2 transitors for each channel).some cases damaged transister are visible physicaly then easily you can identify the faulty channel(maybe cracked or blowned). There is no visible signs then you must do some tests with multimeter.You will find Five relays on the pcb( mostly square or rectangular ice cube relays) each relay have coil and N/O contacts built in and the terminals soldered to the pcb first you should identify the contact terminals (mostly it will be marked at the top side of the relay) otherwise a simple idea is , look on the pcb solder side trace the printed copper track going from the terminals of the relays you will see one is going to the speaker out socket this terminal called Sp O/P, other one going to the Amp O/P Transisters legs (some cases it pass through a coil of few turns) this terminal called Hot O/P . Do the same follow up and find the both terminals for the all the 5 channels.
Next step make sure you or not touching any live power (220v or 110v A.C) tracks or wires inside the Amplifire and you should keep this in your mind althrough the following tests
Take your multimeter select the D.C Voltage Range connect the Negative probe(Black) to the Metal Body of the Amp and put the positive probe (Red) apart safely. plug back the power cable to the Amp and power it from your wall socket then switch on the Amp. Turn the volume control knob to zero and select the input selector switch to Linein or Aux and remove the RCA Cable connected to that input socket. Now carefully touch the Hot O/P terminal of the relays with the positive probe and note down the voltage readings on a paer (Do this for all 5 relays one by one, values result may be + volt or -- volt or zero volt). After see the reading values we can find the faulty Amp section
1. The channels showing zero voltage are in good condition.
2. The channels showing + volt or -- volt ( may vary from 1 volt to 30 volt ) are faulty damaged Amp sections.
Now we located the faulty Amps then how to fix the faulty ones.
before going to do the next step switch off the Amp and remove the power cable from the wall socket. Check all active components one by one (transistors,diodes,zener diodes) and resisters capacitors in the faulty Amp section replace the faulty components by the same value new ones. carefully test the components twise. if you miss a small defect component or replace it in wrong way this single mistake will blow up your Amp again. After replaced the defective components do the relays Hot O/P terminals volt reading test process again. if all the readings are zero volt you have successfully repaired your amp still the reading showing some voltage means you must do the components checkup process again. If you do it slowly with full concentration surly you will fix your problem and your Amp will work back to enjoy the music .GOOD LUCK.
for comments and doubts contact

Feb 10, 2013 | Sony STR-DE595 5-Channel Amplifier

1 Answer

My new JBL onbeat xTreme when connected to my MacBook by Bluetooth and playing streaming from Spotify, keeps goimg into stand-by every ten minutes. It seems that it doesn't recognise that it is c

Same here. Streaming from Spotify from iPhone5..... every 10 minutes enters sleep mode. WTF? No idea how to get around it. Only FW upgrade I guess, if there any...

Dec 06, 2012 | JBL OnBeat Xtreme Speaker

2 Answers

Truck wont start

Turn the key on and leave it on for ten minutes,then turn it off,and right back on,leave it on for ten minutes,then turn it off,and right back on for ten minutes,a total of three times,30 minutes.Then try and start the vehicle.

Apr 11, 2010 | 1999 Ford F350 Regular Cab

1 Answer

My power locks trunk and fuel tank dont work

This happened to me, someone had accidentaly switched the button inside the glove compartment to lock, which locks everything except a few items for the Valet key, keeping trunk, locks and fuel door closed until that silly button is put back in original unlocked position. Goofy, but I suppose it's a good feature for some, sure had the Cadillac guy concerned for about ten minutes until he remembered that stupid lock out option inside the glove compartment!

Jul 06, 2009 | 2001 Cadillac DeVille

1 Answer

M602 Speaker Problem,.. Popping Sound

This worked for me on my M604: Try inserting/removing a headphone plug into the jack several times to see if that clears the problem.

The "popping" sound is very similar to the sound that the unit makes when inserting headphones into the 'headphone' jack on the back of the unit.

The jack has a contact switch that triggers a relay inside the unit. If that contact switch is 'on the verge' of making contact, slight temperature changes may cause deform closer to it's contact target. The subsequent capacitance build-up and discharge across the gap could explain the cycle of popping noises after the unit warms up.

Jun 25, 2009 | Altec Lansing M604 Computer Speakers

3 Answers

Pioneer projection tv SD-582HD5

I had the same problem, try running the TV on Mute, if it is a bad solder joint the sound can vibrate the solder point and trip the relay, if the TV doesn't trip off with the sound on mute then it is probably the big power transformer's solder connection needs resoldered. sound vibration from those big pioneer speakers may loosen the solder joint over a period of time because the transformer is heavier and bulky and vibrates a lot.

Jan 10, 2009 | Pioneer SD-532HD5 53" Rear Projection...

Not finding what you are looking for?
Altec Lansing ACS 251 Computer Speakers Logo

Related Topics:

134 people viewed this question

Ask a Question

Usually answered in minutes!

Top Altec Lansing Audio Players & Recorders Experts

Carlos L. Burgos
Carlos L. Burgos

Level 2 Expert

620 Answers

The Knight
The Knight

Level 3 Expert

75017 Answers

Sharps s

Level 1 Expert

41 Answers

Are you an Altec Lansing Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides