Subwoofer stops working after about an hour's use. Authorized repair technician could find nothing wrong.

Try the following steps to stop subwoofer hum.

1. If the subwoofer is plugged into its own outlet, plug the subwoofer's power cord into an outlet shared by the other components. Use an extension cord if necessary.
2. If the hum persists, and your system includes a cable TV, disconnect the cable line. If the hum stops, install an isolation transformer on the cable.
3. If the hum persists, disconnect the remaining component cables one at a time until the hum stops. Install a coaxial isolation transformer on that cable.
4. If the hum persists, install a line-level ground loop isolator on the subwoofer's line-level feed cable. This usually solves most hum problems.
5. If nothing helps, disconnect all the audio cables from the subwoofer. Leave the subwoofer plugged in and switched on. If the subwoofer hums, it points to a defective unit. Contact the company's customer service to technical support.

Toyota Avalon JBL Speaker Subwoofer Foam Repair 86160 ...

? 18:34
https://www.youtube.com/watch?v=vDHEbiyBt9I
Jul 16, 2012 - Uploaded by Simply Speakers
Toyota Avalon JBL Speaker Subwoofer Foam Repair 86160-AC180 .... Luckily you don't have to remove the rear deck to get at the subwoofer, ...

Removing rear subwoofer / rear deck - Toyota Nation Forum : Toy

One year waranty period from JBL on the electronics.

To find the authorized JBL service center in your area:

• Go to: www.jbl.com
• Click on United States
• Click on Support at the top
• Click on Find My Product
• Enter your Model Number or Select your Product from the drop down list; then SUBMIT or SEARCH
• On the list on the left side, click on Service Center
• Supply your zip code at the next screen, then FIND
• A list of service centers in your area will come up.

I can't fine my power cord for my subwoofer
can i use another cord?

Depending of the type of Subwoofer that required your system.

A) Amplified Subwoofer. (With 110volts A.C. cord attached to the sub)
The subwoofer electronics circuit needs repair or change.
You will find a compatible subwoofer for this type of subwoofer in audio appliance stores.

B)Not amplified Subwoofer (No 110volts A.C. cord attached to the sub)

Bring your sound system to a technician to have the soldering remaked to the devices bolted on the main heatsink.
And have the Subwoofer checked too.

This type of subwoofer can mostly be buy in kit with the satellites speakers.
And need to match thee impedance of the output of your system.

Search for ( 4 ohm or 6 ohm 8 ohm ) near the Sub outlet behind your system.

Spider Guy

Service manuals: http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

http://manuals.harman.com/JBL/HOM/Service%20Manual/PB12%20sm.pdf

Take some voltage reading according to the manuals.

Hi Im a Certified Repair technician, I seen few problems with this unit, there is a amplifier module inside this unit, is really hard to find since JBL discontinued this almost immediately.
Sorry no really worth to bother........

sound like something shorted out or is shorting it out sounds like its in protect mode.-z

Has nothing to do with the signal or source - it is a failure of the turn on circuit - I repair this amp - can help if you find my add here or I am located on ebay as well. Juust do a search for We Repair JBL and find the model :)

did any 1 get a solution for this problem???