I've been using the P200 Subwoofer for over a year with no issue until one day I notice no sound coming from it. I took a look and can still see the powered light is on, shutting off and on (power cycle) didn't help. Checked the fuse, still good. I've let it sit with no power for a few days and revisit to see if I've missed anything. Still no luck. What could be the problem?
Try taking tha cable out of the amplifier and touching it, this should create a low hum, as your body is sending throug a small current. if this works then you may have accidently switched the sub woffer on in the amplefier. if however you get nothing through the sub then you may have a dry joint in the solder, or the board may be dead. Other option, try an other cable. they also use lead based solder so they do get old.
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it sounds like the sub is rubbing in the voice coil.
put the speaker in upside down to what it was before.
sometimes that extra bit of downward pull is enough to offset the error.
There are speaker reconing experts out there but it is cheaper to replace the sub itself.
the sub can be replaced for sure.
It sounds like you are describing an earth loop problem. I won't go into detail in this post, but try an isolation test first. disconnect everything from the reciever except the sub and try connecting say a BATTERY powered mp3 player or cd player to minimise connections to the electrical mains earth. you could also isolate things by taking your sub to a friend's house and trying it on their system. If it is an earth loop use a process of elimination to find out which two pieces of equipment causes the earth loop. then apply filtering. you can buy earth loop isolation transformers for about AU$26 and I've used one on my sub myself. Theyhave RCA (phono)plugs on each end and they connect inline with the signal cable to the sub amp.
as for the thumping sound it might be the speaker protection circuitry cutting off the amp to protect the subwoofer speaker from damaged. This might be triggered if the earth loop sound is causing the sub amp to overload and clip.
Failing this there might be a dried out overheated electro capacitor in the amp circuit causing the hum. Hav a chat to your local electronics person, who should be able to spot it! Hope this puts you on the right track Happy Hunting!
If it's a wireless system, the circuits are drifting off frequency or could be picking up interference from just about anything. If not wireless, you probably have a part (transistor or chip) inside that is developing noise by itself.
You may have a break in the wire. You can find out by slowing moving your fingers down the wire until you notice sound coming from the subwoofer. You can fix it yourself by cutting about an inch away from the break both ways. Then cuttings some of the wire off, so the copperwire is exposed. then wrap the two copperwire ends together and seal it with elections tape. or Try replacing the 60 watt subwoofer wire.
This seems to be a common issue with this camera as several have been on ebay for sale with this exact issue.
evidently the circuit scr that controls the power off is bad and requires a complete dissembly to repair.