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Re: Unit does not power up
1. Switch off unit and unlpug AC cord from outlet. 2. Press and hold the DIRECT and STEREO buttons, whilst simultaneously plugging in the AC cord. 3. Check that the display is flashing with an interval of about 1 second, and release your fingers from the two buttons and the microprocesor will be initialized.
Check also the power adapter if its possible replace it..
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When the variable resistor within the volume control unit fails, it is due to the internal wires shorting out. There are stops along the way as the dial rotates and at times you will make contact and create a connection. The only way to fix the problem is to get a replacement cord from the manufacturer or send it back for service.
Subwoofers produce very high levels of vibration due to the intensity of their job. But the problem you are facing is a problem with the power pack. The power pack on the woofer is not supplying properly therefore the light/volume not coming on when the unit is unplugged and replugged. This also affects the woofer when you turn the amp to high because as a result of the power coming from the amp not being properly distributed instead of the power which flows into the woofer from the amp is not distributed accordingly it could blow the woofer so before it gets to that stage the unit shuts down. All you have to do is get an expert to help you get and replace the power pack. Hope this solution has been helpful?
I have a 3500 and after 2 months it failed. I have an electrical engineering background but I am not a tech. I noticed that that the design has some small capacitors that lay right beside some rectifiers on the power supply. The rectifiers heat up the caps and they blow. My brother in law is a tech and replaced and upgraded the caps, moved them away from the heat source and it seemed to solve the problem. I don't know how the amp would survive without these fixes. My other option was going to buy a separate subwoofer amp for $200 because I like the rest of the unit. I bought a Bryston 4B from him for 500 bucks and he threw the repair in for free.
It sounds as if the amplifier for the subwoofer is shot. If the subwoofer has a seperate power cord from the rest of the unit, your amp is toast. If the subwoofer is powered by the same unit that is powering the other speakers it could be a loose connection somewhere.
If there is no power at all, then try bypassing surge protector, check power cable, and check if power cord is fused.
If unit has power but does not start, then it is on protection.
Protect mode will kicking whenever a fault is detected.
Causes that can start protect mode are:
Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.
Bad speaker wiring. Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.
Internal fault. Internal
fault is the natural cause for protect mode. If all the above did not
work, then the problem is a blown component or an internal fault. In
this case the unit must be taken apart , tested and repaired by an
experienced person. If the unit is less than one year old, or if you
want to get service, call Sony at the phone number listed on the
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.
the very best way to solve your problem, go to the electronic store and ask a dc power supply adapter 15volt 2A,vice versa polarity. with universal connector for it sure you can select the right type connector do you have for it fit to the back socket of your unit. before you connect read the correct polarity of your device you see label at back (+, -). and set the polarity output of the adapter correspond to your unit,,,
Well as I see from the owner manual for this device the sub is active one and my opinion is that electric is your problem.The power of the sub and main unit must be on the same phase otherwise you'll hear brrrrr or frequency of your main unit power supply on the sub.Thats why sound changes when you open or close the door.Take one power distribution cord (get power for bought devices from the same place) and connect main unit and the sub on it and then try.I hope that this will help you