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Because the system is bi-amplified, it is important to replace the wires correctly to avoid phase problems. I don't know how the wires are colour coded, but if it is any help I downloaded the schematic and the wires are numbered 1: Woofer Active 2: Woofer Earth
3: Tweeter Earth and 4: Tweeter Active. Sorry if that's no help. Otherwise it should be easy to trace the wires to see which connect to earth.
do you have a red led or nothing? the problem that has been happening with these sub woofers is the two power transistors are going they are TIP31C and TIP32C on the power supply board. Also the resistors are going bad after that and the two bigger caps on the pwr supply board need to be replaced. you see the caps blow which cause the power to peak and dip in the power amplifier and then peaks too much blows the transistors and then all of the resistors.
Please check your model number, I can not find it on the JVC service website.
This is a powered sub-woofer I think. You need to have a thick black cord that connects the sub to the head unit. Then the satellite speakers get connected to the speaker jacks on the sub-woofer box. The sub-woofer should also be plugged into an A/C outlet on the wall.
The speaker outputs are labeled right there where you connect the speaker wires. You should see a red and black connector for each speaker and they are labeled "front right" "front left" "center" "rear right" "rear left".
If you do not have the thick black cord you need to connect the head unit with the sub-woofer, you can not use this system.
If you look at the head unit and give me the model number on it, I may be able to find the part you need. But I must have a good model number to work with, preferably from the head unit.
if u are a technician then its easy to check, problems are, blown fuse, power amp IC output transistor may be blown, check for burnt componenets. changing and blowing a fuse means ur output IC or transistors are shorted.