Question about JBL PSW-D112 Speaker

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No more thump

My sub powers on, but sounds like no signal is getting to the power amp. it has a pulsing buzz when music is playing. replaced 2200uf 100v caps. temp has efect around Q12 transistor and R15 resistor is missing. looks like R15 was cut out. no cold solders. any suggestions where to check next. nothing looks burnt or swollen. thanks, tboybad

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5 Suggested Answers

Maanita
  • 1142 Answers

SOURCE: JLB PSW-D110 Subwoofer Issues

Humming is always caused by low earth resistance so check the earthing.

Posted on Sep 09, 2008

SOURCE: JBL Sub 12 continues to make clicking noise

check the audio amplifiers of the sub

Posted on Jul 13, 2009

Grubhead
  • 4678 Answers

SOURCE: JBL Sub 12 going in and out of standby.

It sounds like a semiconductor device becomes faulty when it gets hot. Check around the parts you have looked at already for a transistor or IC etc. If you find anything wait till the sound acts up and then spray the suspect part with Servisol Freezer Spray. If the sound becomes normal again it's faulty. You can get the spray from Maplin (UK) or Radio Shack USA or that type of shop.

Posted on Oct 11, 2009

  • 1 Answer

SOURCE: no sound from sub. fuse is good and the amp

having jbl speakers but no sounds at all

Posted on Dec 31, 2009

  • 382 Answers

SOURCE: I need a new power amp for a JBL PB12 Subwoofer

Alf, when there is no parts available you have to start looking at local non authorized repair shops that will inspect and repair the board instead of trying to source a replacement board.

This can be very difficult and could make for alot of expensive deposits. Running out of parts is an ongoing problem with all electronics and sometimes replacement is the most cost effective option.

Cheers,

Kevin

Posted on Feb 09, 2010

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