Canton Plus B active sub troubleshooting

elda

New Member
Hello,
I'm trying to troubleshoot this subwoofer, that doesn't turn on.
What I have done:
  • Opened it and checked for bulging caps: there were none
  • Desoldered the power board (it really isn't a power board: it just switches on and off the mains)
  • Checked a cap there (desoldered, so I could test it out of circuit): the capacitance is halved. It's a blue Philips
  • Tried to bypass the relay of the aforementioned board: the amp draws 0,2 A @ 220V
What can I try next? I'm not afraid of soldering/desoldering stuff.
P.S. the Archive has the manual with a schematic: https://archive.org/download/canton-plus-b-anleitung/Canton Plus B Anleitung.pdf
 
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