20 Most Recent Creative Labs Gigaworks S750 Computer Speakers - Page 3 Questions & Answers

The S750 system is a great sounding one but unfortunatly like many similar systems all the amplifiers and power supplies are housed inside the sub box. This means they suffer badly from heat and vibration problems (they cook themselves or shake themselves apart). I have fixed a few S750 systems in the past but due to their complexity it's not for the faint hearted.

Congrats, you yourself is a good troubleshooter. Just pinpointed your problem. What you just diagnoist can be easilly checked just by taking other good known speaker. If that works your speaker is short check for audio output wires. If not your card needs replacement. If need further clarifications just comment.

The volume in your system and your television is separate. Mute your television, and rely only on your system.

Sha'ul

I have a similar problem on the Gigaworks S750 system. Upon opening, I have found that the IC driving the switch mode power supply becomes basically a short, and that the transformer becomes damaged as a result there of as well. Then you have about 22 Ohms connected to your mains (after the bridge rectifier) which causes the fuse to blow. Is there anyone that can assist with a circuit diagram for this system, or of contact details as to where I can find out what the specifications of the transformer is? Can not seem to find any technical assistance in South Africa

Either you have it configured incorrectly this time around, or the settings are defaulted back to original on your DVR........ adjust your DVR sound properties/settings. and check all wires/connections as well.

Read this http://forums.creative.com/creativelabs/board/message?board.id=speakers&thread.id=8037&view=by_date_ascending&page=85
I was about to buy these speakers, but not after reading this

I could buy your sub if you want the power system in the sub is vary complex and it normaly fails on most peoples systems but i already had a custom amp and know want to use the woofer in my system email me if you interested

I believe that you are referring to the small yellow ceramic capacitors on the amplifier boards that tend to short out. Below I have pasted a link to a forum thread that contains the information you are looking for as well as some great pictures of what you should see. The driver IC that you are referring to I am guessing is the STA575 amplifier chips which are located on the amplifier boards attached to heat sinks. One board has 2 of them the other has 3.

http://forums.creative.com/creativelabs/board/message?board.id=speakers&thread.id=8037&view=by_date_ascending&page=16

There is obviously a problem on the amp board with 3 STA575 amplifiers. It may be that one of the diodes is shorted or one of the capacitors has dried up or shorted. For more information I have posted a link to a forum thread that contains all of the information you would need to fix the Gigaworks S750 system. If the information has not already been posted there then you can ask on there and the people there will point you in the right direction.

http://forums.creative.com/creativelabs/board/message?board.id=speakers&thread.id=8037&view=by_date_ascending&page=1

Your problem sounds like it is the high voltage power supply not working. I would start by checking the IRF740 MOSFETs on the power supply board. Below I have pasted a link to a forum thread about fixing the Gigaworks S750 systems. There is a lot of information there about the problem you are experiencing as well as complete diagrams of the power supply and good pictures.

http://forums.creative.com/creativelabs/board/message?board.id=speakers&thread.id=8037&view=by_date_ascending&page=1

You can see about getting a new control pod from ebay or craigslist but the problem is more likely inside the subwoofer. Below I have pasted a link to a forum thread about fixing the Gigaworks S750 systems. There is not much information there about control pod problems but at least the people on the thread will help as much as they can. If you are not familiar with electronics then some of the people on the forum thread can help if you are willing to ship the subwoofer box to them.

http://forums.creative.com/creativelabs/board/message?board.id=speakers&thread.id=8037&view=by_date_ascending&page=1

Double check the connections, if the connection for the control pod is good then something is wrong inside. I would say most likely thing would be a problem on the power supply inside the subwoofer box.

Same problem just went out after about 4 years.... weak lifespan for a 500 dollar system

Remove all the connection and using manual once again try to connect back .

Some loose connection will be there .

Change the fuse - located at the 220V input. Use a knife ti release it. Then the system will work again.

The internal amp for the left rear speaker has a faulty transistor or IC chip this would need to be replaced.

i had the same problem, apperantly creative made an error making the hardware for the subwoofer, and put in an mos-fet with to little resistance, i called creative and gave them the serial number behind the subwoofer and they sent me a new one that hasnt acted up yet.

once the caps blow they usually take out the driver ic too.
check across your power to the amp with ohmmeter
when you find the issue it will drop to around 20 ohms in one direction.

The sparks that you specified looks like.. a transformer problem.. And yes they charge 200$ for labor!! The cost of a replacement transformer is around 120$

Cliff
First things first:

This is not a special and critical eq. from creative, you can take it to the reapair shop and they sometimes have the schematics, other than this, sorry you have to RMS to CREATIVE.
Carl