quote krallopianThere is an IN Short And IN Long Response with my solutionI just bought a "refurbished" set of Z5500, and immediately after setting them up they didn't work. A VERY loud and extremely annoying HUM from all the speakers. Only on 6 channel/stereo modes, not on Optical or Coax (and regardless of any inputs being hooked up)
Just speakers plugged in to woofer, and wwhen I would hit "power" on the control pod, it would start humming immediatly.
I ripped the box apart, and saw that the two capacitors were both loose (on the power supply) so I ripped all that apart, resoldered the connections and glued the things down, and turned it on and PRESTO, fixed!
Not an easy fix for someone without experience, but technically its very simple. I figured who ever had these before me rattled the crap out of the box (loosening the capacitors) and well... I "un" loosened them by simply soldering them back in place.
Very happy, amazingly strong system!!
I signed up to this page to post this, hoping it will help someone down the road - since I couldn't find this fix anywhere. Enjoy!
quote WaxinatorThe hum problem can be fixed in two ways.
First unscrew the 18 screws and fold out the heat-sink back-panel. Look inside towards the right and you see the ring-transformer.
Using a 14mm wrench-key you can either(1) tightened the loose bolt or(2) completely remove the transformer and with tie-wraps fix it to the rear side of the wooden triangle. Put some foam-plastic cushion around the transformer, isolating its vibrations from the box.
I now have one pretty silent(1) and one completely silent(2) bass units.
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