All subwoofer fuses are fine but still not working

firstly check your power cable by moving the wire in various directions while it is plugged in ac outlet and powered on, if it lit up the standby power LED then the prob lies on the power cable. If not, try opening the speaker system box itself (be sure to unplugged the power cable before opening the box), then visually check inside for the little cylindrical glass type tube(if the circuitry still uses this kind of fuse) if it is burnt-out.
Hope this help pal...

I manage to slove to my DPX-U5120 Subwoofer level adjustment. In STANDBY mode, Press the Main Volume button and turn to Setting, turn until you find the SW Preout, Swith to normal mode, its won't work if u switch to REAR

Go back to CD/USB Mode, Then Press the Main Volume and find Audio Adjustment and now u can find the Subwoofer Level , Sub Phrase and Sub LPF adjustment.. Um Glad i found this and Happy Setting

You can remove the screw near the volume knob and the screw near the on/off switch - then slide out the amp remove the black and white wire - then check the fuse - if its blown look for we repair amps - ebay - if its good then it probably still needs work - it should turn red when plugged in and no signal and green when signal is present - which means amp is on.

If theres absolutely no power and no lights on, it sounds like the fuse inside the t.v.. It is pretty easy to change. You have to take out the screws on the back of the t.v. and take the back cover off. Look for a 3/4" glass tube fuse and see if the tiny wire in it is broken. Pop it out and bring it to radio shack and get a new one. Put that one in and try it, Make sure the t.v. has been unplugged for at least 2 hours before opening it so the capacitors have time to drain. They will hold power and could shock you if your not careful. Also, dont use anything metal to take the fuse out.

a black fuse means really excess current.if it is the ac mains fuse be careful.i am is 120 watts of power different.if it is the dc fuse,try a slow blow fuse with the same rating. it will allow more dynamics from movies ect.

are you replacing the ceramic fuse with a glass one? i was doing that and having the same problem. i have the part number if you want to order the ceramic fuse from jvc QMFZ059-1R0-E they are $8 after shipping if you want to try that. hope it works out.

its the problem of the ics on the main power supply board

Do the IC heat sinks get warm??

If they do not, check fuses F852 - 2AMP, F853 - 1.25AMP, F850 & F851 - ALL 5AMP on the power deflection pcb. THESE ARE NOT GLASS FUSES. They are usually about the size of a 1 watt resistor and either green or orange in color. They are soldered in. The nomenclature is printed on the component side of the board. They are all about centered on the opposite edge of the PCB as the high voltage transformer.

If you have cleaned up the mess you describe you most likely have one of these fuses blown.

if dont have any technical knowledge its advisable to call a technician as it is worth getting it fixed.

thanks.

IT COULD BE A FUSE , needs to be replace , if your handy , you can do it yourself , open unit , and check where the power supply is .look for a tiny glass tube type fuse , replace , and try again , hope this helps , please rate , AJ

I had the same power problem with my th-c50. In fact, this is a common problem with this model Home Theater In a Box (HTIB). The issue truly is the fuse. All you have to do is take the cover off and replace the fuse. There are approximately 8 screws total to take the cover off and you can do it with a standard phillips screwdriver. Once the cover is off, the fuse you need to change is underneath and slightly to the right of the power input (if the box in on your lap with the front facing away from you). The stock fuse is a ceramic, white fuse and if you aren't familiar with fuses, it looks like a very small cylinder. The model number is T1AH250V. These numbers mean that it is a 1 amp, 250 volt ceramic fuse, 5 x 20 mm in size. The fuse is held together by four metal posts. Bend the posts back to take the fuse out. Go to Radio Shack or your local hardware store and get a replacement fuse with the specs above. The problem that I had is that none of my local hardware stores had a ceramic fuse with these specs, only glass. I bought the glass fuse anyway (T1AL250V) and it works beautifully. Be sure to buy a "slow blow" fuse instead of a "fast acting" as they are more durable. Insert the fuse into the slot, tighten the clamps, put the cover back on and your done! It doesn't take too long. Hope this helps.