Question about JBL PB12 Subwoofer

Jbl PB12 powered sub woofer

My subwoofer lights flicker on the front green/red/green. Also a clicking sound. It smelled like an electrical burn of some sort. no power surge. I took out the board and their is a black burn spot on the board. Can it be repaired? Thank you, Daryl

1 Answer

Anonymous

If your serial number starts with ha then it's probably a bad capacitor C72 . 6.8uf 100v np electrolytic. replace it with a higher voltage capacitor of the same value.

Posted on Jan 05, 2008

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You can download the service manuals here and read the service bulletin and check per manual.
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

http://manuals.harman.com/JBL/HOM/Service%20Manual/PB12%20sm.pdf

Hopefully the ClassD module is not bad.
This is what I have done to my: http://s807.photobucket.com/albums/yy352/budm/JBL%20PB-12%20mod/

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Service manuals: http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf
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My ClassD module shorted out (buzzing sound/blown fuse) and not availabled any more so this is what I did: http://s807.photobucket.com/albums/yy352/budm/JBL%20PB-12%20mod/
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http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

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yes it can be repaired. but i need more details on this...

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exactly......I bought a Klipsh

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JBL PB12 will have loud thump or pop!

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