Question about Logitech Z-340 Computer Speakers

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Woofer Quit My Logitech Z-340 woofer start humming and after couple weeks it quit work completly. Now only the two spearkers is working. If there was a bad power supply nothing will work, I think. What else can be? Thanks. Nyck

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Check the pin connection it is loose or the pins may be bent. Check Connection to sub hold it in tight if no pins are bent and see if the hum stops. Hope this Helps it is what was happening to my set>GOOD LUCK>If pins are bent straighten them>

Posted on Jan 20, 2009

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Why do my desktop computer speakers have a humming noise all of a sudden? They were turned off for a couple of days .


Check the speaker cables for connectivity. Be sure to securely plug in the stereo jack/s at the back of your pc

Jul 21, 2014 | Logitech Computer Speakers

1 Answer

Why do the speakers hooked up to my Acer Aspire E380 ASE380-UD500A Desktop PC all of a sudden start to hum?


Humming is usually caused by a bad capacitor on the power supply board. Look at the caps on the board, any that are puffed up, burned or leaking (brown at the base) need replacing. Make sure you get the EXACT same capacitors and pay attention to the orientation so you get them back in properly, if you don't you will fry them soon as you apply power to the board.

Jul 21, 2014 | Logitech Computer Speakers

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Can not get subwoofer z-340 to work with i3 laptop. Speakers work, but not subwoofer


Ensure it is connected according to the manual and plugged into a wall outlet for power. The small speakers might work just being plugged into the computer but the subwoofer requires a much higher voltage to run.

Sep 28, 2013 | Logitech Z-340 Computer Speakers

1 Answer

I've plugged in my speakers and the woofer but only the left speaker will play sound and its almost a whisper


Try to check for sound manager to check balance is on for both sides (left right) and wave balance is normal value. To call master volume just duble click system tray volume icon (next to clock) and check it.

Aug 03, 2009 | Logitech Z-340 Computer Speakers

1 Answer

AVS500 Woofer has low Freq.pulse.front and back speakers working. Need circuit diagram to trouble shoot . Henry


Is the power supply AC or DC. I had a similar problem with my boston acoustics speakers, and I was able to swap the power supply for a DC output one of the same voltage and amperage and the hum went fully away. it is an inverter circut that went bad in my woofer.

Jun 13, 2009 | Altec Lansing 621 Computer Speakers

1 Answer

Our logitech z-340 speakers are not working and there's no power?


Plug the satellites into the subwoofer, plug the mini jack into your computer, plug it into a wall out, and turn it on.

May 30, 2009 | Logitech Z-340 Computer Speakers

2 Answers

How to disassemble Logitech Z-340 sub-woofer


The speaker bezel can be removed in only two ways:

1) Somehow remove the grille in order to get a the screws which hold the bezel onto the cabinet. I tried to do this and couldn't get it to budge. Once I got the thing open I observed that Logitech used a LOT of glue to hold this thing together.

2) Drill holes THROUGH the grill above each of the 8 screws large enough so you can loosen the screws.

Once you get it open, you'll be shocked to discover what you thought was the subwoofer cone is actually A ROUND PIECE OF CARDBOARD fastened to the foam. The 4" driver is behind this fastened to a board halfway back pointing into the chamber containing the electronics.

You can get to the power transformer, but good luck removing it. The screws are nearly impossible to unfasten; more glue but more importantly incredibly awful access to the nut and screw (yes, a screw, not a bolt).

I wouldn't pay 5 bucks for this system. Luckily, I didn't.

Oct 27, 2008 | Logitech Z-340 Computer Speakers

2 Answers

Sub woofer problem


I would check the power input otherwise if brand new return for replacement

Nov 29, 2007 | Logitech Z-5300 Computer Speakers

2 Answers

LED light fades as soon as turned on and no sound


Hi Umphreak
It is bad resistor issue on your logitech speakers, has to replace them. (or) the power for your mac mini, its not very AMP good, for them.
try in another PC and see if work fine the speakers.

Nov 25, 2007 | Logitech Z-2300 Computer Speakers

1 Answer

Humming in woofer


A wiring diagram could be difficult if not impossible to find but you should'nt need one anyway.

You're correct in saying it's most likely a filter cap in the power supply, of which would be a larger electrolytic cap that may even display signs of being faulty. Look for leakage of crusty brown stuff on the end where the rubber seal and leads are, or possibly the other end, shrunken plastic skin, bulging or other signs of over heating. Replace any you find that have visual signs of failure.

Sometimes you cannot tell by looking if a cap is bad but it would'nt cost that much to replace the larger ones in there anyway. Open up the unit, write down the electrolytic cap values
you find, go buy replacements and replace em.

You're hearing 60 cycle hum so the filter(s) you need to replace will be quite large physically and have a fairly high micro farad value....such as 1000, 1500 or 2200.

When buying replacements, get as close to the micro farad rating as possible and buy at least the same voltage rating, or higher. Be sure to solder them in correctly, there is a negative and positive lead and you dont want to get those reversed or....
BOOM!

** Please re-comment if the suggestion did not work for you, there may be several other possibilities.
** Please add a comment before giving a rating other than Solved

Oct 23, 2007 | Altec Lansing ADA 885 Computer Speakers

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