Question about JBL PB12 Subwoofer

1 Answer

My woofer kept blowing fuses, so my friend tracked down the problem and said I need a new power coil transformer? Does anyone know what that part is and where I can find a replacement? Any help is s

I need to fins a part for my JBL PB12 subwoofer. It kept blowing fuses, and my friend tracked down the problem, and said I need a new power transformer coil? Does anyone know what this is, and where I can find the part? Any help is seriously appreciated.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 616 Answers

You would think all these questions could be answered by your friend, right? no- contact JBL and ask for the part, its the large xformer that provides the amp with the very large amount of current it needs to drive the speaker. A local audio shop would probably have one. take yours in to have it tested, its very easy to do, they can even order it for you. good luck!

Posted on Jan 23, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Yamaha P1500 power amp will blow the 230V fuse right when power comes on.


Hi Harald,

That amp could have a great value from your friend, being not thrown out

yet.


If you prefer to have a lasting relationship with your friend, you may need

to have it repair , if you can't.


If you prefer to repair, start by isolating components on the amplifier.


Conquer the power supply.

Isolate the transformer from the power supply , and see if the fuse

still breaks.

If still does , you might consider your first option

(cause you have a bad transformer)

But here in our country it is of No problem.these can be rewind as

the original winding.


If the fuse doesn't break then trace on the power supply rectifiers,

capacitors to the output transistors.


Take out the bad power transistors in pairs.

If these resolves the blowing of fuses.


then look for additional possible bad components around it.


You may have a channel busted , but at least you have one running.


It is for you to decide, to continue repair or buy the power transistors

and other extra components.


These would at least make your friend happy, if you can have it

running again.


Let us know what you find or needs further assistance.


Have a nice day!

Nov 02, 2012 | Yamaha Audio Players & Recorders

1 Answer

To Mr. Hyde: you appear experienced with Bose 501 Series III speakers. I need to replace a burned out glass bulb fuse inside the right speaker, the fuse for the woofer I believe. I think that you said that...


Hello whit_hughes,

Just received your request for some information regarding Bose 501's......... Series III. Your looking for te manufacturers part # for the fuse which is in line with the woofer? The fuses used ON the Series III Crossovers (hard wired/soldered directly to crossover board/componants) have been Identified as BUSS #2494, 2amp, Quick-Blow Glass Tube Type Fuses. The fuse which is in-series with the woofer & the fuse which is in-series with the pair of tweeters are the same! In theory this means that the woofer is capable of twice the wattage of the tweeters due to the tweeters being wired in series with each other..... which in turn divides the power beween the two equaly. On the woofer circuit there is only the one speaker or voice coil obsorbing the power. The woofer circuit being wired in parallel with the tweeter circuit again splits the power between the two cuircuits..... so in an ideal situation the woofer sees 50% total input power while the tweeters each see 25% total input power;;;; totaling 100% total. The way Bose has fused them in the Series III's is such that each branch can obsorb a total of 2 amps before shutting down each indivigual branch. This can be adventageous..... should peak power be exceeded causing loss of full load abruptly, Amplifier Power Output Transistors usually blow..... however when only half of the full cuircuit shuts down due to peak power exeeding limits causing one fuse to open (blow) ... the actual impedance (resistance) of the speaker increases protecting the Amplifiers Output Transistors! Thats the reason for the 2 fuses. Each of them are identical. They are soldered into place.... via the wire which is attached to each end of the fuse. (Note; the fuse "kit" Bose is trying to sell you is an external in line fuse holder for each speaker {costing 1.29 each} & 2 fuses for each holder, One for now & One for Later aftr it blows {costing 1.00 each}..... costing Bose 6.58, neting Bose $13.42 Profit!!!! Keep in mind that this fuse WILL NOT FIX YOUR PROBLEM EITHER! DUE TO THE FUSE WHICH IS PRESENTLY BLOWN HAS NOT BEEN REPLACED!!!!! ) The one that has to be replaced is on the crossover... not between the Amplifier & the Speaker Enclosure. Tools required = 1 Long Big Straight Blade Screwdriver to pry off speaker grill, 1 Phyllips Screwdriver to remove screws seccuring woofer to encloser... be carefull not to damage/tear gasket, 1 pair side cutters to cut blown fuse out of crossover curcuit, 1 pair needle nose pliers to attach NEW fuse to crossover curcuit, 1 soldering Iron & a small piece of solder to re-solder fuses leads securly to crossover curcuit. ( replace gasket, woofer, screws, & speaker grill. ENJOY! Should additionaL informaton be required please let me know.... you'll have to leave me your e-mail address for pictures or drawings.... as I don't think they can be sent through this site. Hope this helps ya..... Its an EASY JOB...... you CAN DO IT! & will be glad you did when your done, they'll sound GREAT! ) GOOD LUCK!

Jun 22, 2011 | Audio Players & Recorders

4 Answers

I got logitech speakers X-230 M/N: S-0123A that need ac110-120v- 60 Hz from USA and by mistake plugged it into ac 220 v that is standard in new delhi. there was a spark and smoke from the woofer unit, and...


You have damaged the power supply unit and this would have caused some failures on the power supply and sometimes on the drivers.
So first of all please check the power supply unit, alternatively the DC power required can be supplied by incorporating a new power supply with the same rating but working on 220volt.
repairing the 110 volt supply is no good as you will need again a step down to work , so I suggest this change.

Feb 25, 2011 | Office Equipment & Supplies

2 Answers

I also have an Athena ASP4100 sub woofer which blew the fuse on the circuit board and when I replaced the fuse, it just blew it again. As an electrician, my understanding would be the circuit board has a...


You should look at the circuit board for the power amplifier and check for any leaking or bulged electrolytic capacitors. If this speaker uses the circuit boards made by AMI (such as most JBL and Mission sub woofers around 1999-2001 vintage) they had a lot of problems with this as well as bad modules. Google for the module S53AMI and you will find lots of info if this is what you have in that Athena.

Feb 21, 2011 | Athena AS-P4000 Subwoofer

2 Answers

Got a cerwin vega cls 12s keeps blowing fuses. It has been well kept and all the connections are in the right place. It pop's before the light can come on. How do I fix, radio shack just down the road.


Hi,
by the sounds of it the internal transformer could be duff. You need to take readings from the transformer using a multimeter to check correct voltages are coming out of the transformer to their destinations. I would also chek the capacitors and other components on the chain pre and post transformer to make sure none of them are damaged too.
IF YOU ARE NOT EXPERIENCED WITH MAINS ELECTRONICS DO NOT ATTEMPT THIS YOURSELF!!!!

Jan 07, 2011 | Cerwin Vega LW10 Subwoofer

1 Answer

The required fuse is 1.6 A / 125V an is blown, I wen to radio shack and bought a 1.6A/250V and it has blown 2 already, what can I do or check to fix it? This is a Sony Sub-woofer model sa-wmsp1.


Hi,
If power transformer T1 got shorted or its output voltage got shorted for some reason, fuse will blow in Sony SA-WMSP1 active subwoofer.
Check power transformer, D401 bridge rectifiers and IC301 power amplifier out chip. Any of them is bad.
Let me know if you have additional question.
Thanks.

Jan 08, 2010 | JBL PSW-D110 Speaker

1 Answer

Keep blowing fuses


Check for shorts to ground in the speaker wiring, the speakers themselves, total Impedance, especially woofers. Proper size power and ground wire and all connections. Use a Ohmmeter or find a friend with one that knows how to use it, If all else fails RMA .
Good luck, sumthin

Jun 10, 2008 | Kenwood KAC-7202 Car Audio Amplifier

1 Answer

No power, LED blinking, Low voltage regulator IC?


check for bad solder connections then check all fuses the ones that look like resistors too get back to me

May 22, 2007 | Toshiba 57HX81 57" Rear Projection...

1 Answer

How do I replace a damaged power supply transformer on a DN-600F ?


Hello there. i'll suggest you one quick solution but it maybe dangerous!(Do it the greek way :P) try to remove the transformer from the machine. Take one Ohm meter and measure the resistance of the 120 vac coil. IF THERE IS NOT ANY (i mean that the ohm meter shows nothing diferent than not using it) get a paper blade and start removing the paper cover that it has rounded from the place where the 120 vac wires goes. you will see there that there is a mini thermal fuse.short circuit the thermal fuse and try to measure again the resistance of the 120 vac coil. if you see something between 40 and 80 ohms you are ok. Now that you haven't got any thermal fuse on your transformer just increase your security putting on a 300 mA fuse at the 120vac coil. I have done it with many hard to find transformers and it worked for me.Just be sure that when you plug it on, you will not touch it because i don't know if you are gonna do it right.ok? (say ok!) That was the second solution to your problem. The first and the safest is to go to your local dealer and order a new transformer.

Oct 12, 2006 | Denon DN-600F CD Player

1 Answer

TV pops and shuts down


Get a good fire insurance policy!! The problem you have is the flyback transformer but its going to be hard to get just that so order the sweep board that the transformer sits on. Also your making a very dangerous situation for you or your family. Im praying something doesnt go bad in the middle of the night and start the set on fire. As theres always power to that set. Good luck and dont risk your life or anyone elses to save a few bucks. Get a trained tech to service this set, as a TV set is no place for an experimenter to be. Good Luck

Aug 14, 2006 | Pioneer SD-P50A5-K 50" Rear Projection...

Not finding what you are looking for?
JBL PB12 Subwoofer Logo

Related Topics:

597 people viewed this question

Ask a Question

Usually answered in minutes!

Top JBL Audio Players & Recorders Experts

Michael Edwards
Michael Edwards

Level 1 Expert

60 Answers

 Grubhead
Grubhead

Level 3 Expert

5017 Answers

Vito Vacirca Jr.

Level 2 Expert

140 Answers

Are you a JBL Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...