Question about Creative Labs MegaWorks THX 250D Computer Speakers
I have the Creative Megaworks THX 250D 2.1 speakers which are excellent, but sometimes the digital out would play fine for a bit then start petering out and some blipping noises then slows down and stops and then no sound. The analog out sounds come out but have loud pops. Any ideas wot I can do to fix this? I have a multimeter so I can check components but I need to know which. Thanks
First things first:
* this is a creative labs speakers models sub problem**
if you have warranty I suggest you use, Creative is alert on this kind of pop up sounds and others, concerning the subwofers.
time to RMS, or fix on house or other person who can change some resistors on the SUB.
other than this, ...just change for CREATIVE 7800 speakers, are good, and they correct this issue on this ones, I got it and I have 3 years with them and no problems.
Posted on Feb 08, 2008
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Posted on Jan 02, 2017
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I was able to repair my sytem using the guidelines from pouakai at (http://forums.creative.com/t5/Speaker-Systems/Successful-repair-of-MegaWorks-THX550-power-supply/m-p...
My system also would not turn on. The problem was on the power PCB - the one with the two large heat sinks attached. I found that the piece of PCB track joining the 2M ohm resistor (connected to the LINE-SENSE pin of the TOP243Y switcher) to the positive output of the full-wave bridge rectifier, was broken. This could have been caused by corrosion from the glue (which covered that section of track). I also replaced the 2M (0,5W) ohm resistor, just incase it was also to blame. The 2M ohm resistor is located under one of the two black heatsinks. I used a short piece of wire to replace the PCB track (from the large filter capacitor next to the resistor) to the 2M ohm resistor. Plugged everything back in, and it worked!
The circuit diagram given on page 21 of the TOP234Y's data sheet was very useful, and helped me understand how the circuit functioned.
I hope this is heplful for others who have this "no power" problem!
Aug 22, 2009 | Creative Labs MegaWorks THX 550 Computer...
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