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BAR 48 subwoofer power supply fix


nova
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Has anyone had an experience fixing a power supply from the BAR 48 subwoofer? It clicks every 5 sec, output is jumping simultaneously from around 0 to around 3v. VDD is also jumping up to 14v and dropping back down. It looks like it tries to start but something is triggering protection on OB5269. I've changed OB5269 - no effect. Diodes look good, pulled out FET and checked - looks good as well. Capacitors look good. Nothing is visibly burned. I couldn't find any info on that power supply, even the output voltage.

 

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Edited by nova
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@nova

My BAR 48 is still under warranty so I haven't explored any drastic measures. Of course, Klipsch tech support remains mum on the types of issues owners are experiencing let alone the cause.

 

Up until now we have assumed most of our issues are firmware related so I find your post most interesting. I have asked tech support if some of the issues I have reported may be related to hardware defects and if there have been any hardware revisions but so far they have been ignoring me! 😣

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Based on voltage divider values the output should be 32 volts. The problem is there isn't much readily available 32 volts and 2.5 amps switching PCBs on eBay or AE. It looks like the only option is to replace everything concerning on the board.

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1 hour ago, nova said:

It looks like the only option is to replace everything concerning on the board.

 

Like I said,

9 hours ago, KevinB said:

My BAR 48 is still under warranty so I haven't explored any drastic measures. 

 

Have you considered just asking Klipsch for a warranty replacement?

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14 hours ago, nova said:

I'm not under a warranty, unfortunately.

Considering how many issues this product has and how dissatisfied owners are, Klipsch has to be aware how this product is impacting their reputation. It may be worth your effort to ask for a replacement and see if they are willing to do something.

 

Maybe they would be willing to send you a replacement board...

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  • 7 months later...
  • 1 year later...
On 6/6/2020 at 8:28 AM, nova said:

It was fried IC5 (431 zener). Sub is up and running again.

 

I've contacted Klipsch support about the power supply board. Let's see what will be their answer.

I have replaced 3 power boards on the 3 sound bar's and was successful.

Now I have one of the the three subwoofers not powering up.

I ordered the IC5 431 Zener and will replace soon.

I will keep you posted.

Edited by ralphkramden25
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On 3/15/2022 at 5:19 PM, ralphkramden25 said:

I have replaced 3 power boards on the 3 sound bar's and was successful.

Now I have one of the the three subwoofers not powering up.

I ordered the IC5 431 Zener and will replace soon.

I will keep you posted.

IC5 was not the power problem. I will have to actually get a meter out and see what's going on. if there is any more information on this power board I would appreciate it!!

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