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Old 06-13-2011   #20
eaddy504
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Join Date: Jun 2011
Posts: 1
Thumbs up Re: True Subwoofer Signature (Sunfire) No Sound

Quote:
Originally Posted by Rajesh View Post
Hi,

Then it's a lot easier. Your 13V is stable . Your op-amp is fine . All you need to do is check Q14-Q17 . The fuse will blow only if this transistor shorts. Remember to change the driver transistor as well. Q13 & Q18 . The unit should be restored.

As a caution check these diodes D10-D13 . D-10 has a resistor in parallel so it will read 39 ohms. The other diodes are 1N4148,replace all 4 even if one is short. Good luck to you .


Regards
Rajesh
Thanks a lot Rajesh, I have two of them one has a similar problem and fixed as per your instructions,

Other one has different issue the subwoofer turn on normally but to get audio I have to increase the volume more then 75% I have already changed the volume and crossover but didn’t make any difference. “Do you have any idea what’s wrong with it?”
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