Troubleshooting B&W Original Powersupply

[OmidN]

Re: Troubleshooting B&W Original Powersupply

Thanks for your help and prompt reply.

I should find a place to test them since I don't have the meter.

When i looked closer it doesn't seem to me that they are burnt, maybe it was the photo.

PFA a better photo

Thanks

[stj]

Re: Troubleshooting B&W Original Powersupply

test them with a meter

[OmidN]

Re: Troubleshooting B&W Original Powersupply

Hi Stj,
Many thanks for your quick reply, so do you think i would change them first and give it a try?
could you please let me know the model and the details of the 4 diodes to purchase?

Sorry I don't have electronic background , I am just trying to avoid throwing electronics
Thanks again

[stj]

Re: Troubleshooting B&W Original Powersupply

strange,
the 4 diodes - D201 etc look like they have burned/corroded leads.

[OmidN]

Re: Troubleshooting B&W Original Powersupply

Hello,
I came across this forum and it seems it the only good help on the net. I had the same issues and I decided to follow the instruction to open my speaker, but when I reached PSU it doesn't look evident to me. Maybe the yellow one?

I appreciated it if someone could help.

Thanks

[SilEng]

Re: Troubleshooting B&W Original Powersupply

Hi again,

I took the opportunity to replace all 6 caps with Panasonic FR types and paid princely sum of £12, it took no more than an hour to repair. It's now working again and sounds great, for a freebie I cant complain. Just need a blue tooth dongle and add some new fabric over the speaker grills to make it mint again.

I am a little gutted as my son has pinched it for his room.

[SilEng]

Re: Troubleshooting B&W Original Powersupply

Hi all,

Picked up a B&W Zeppelin for free last night and was told it had stopped working although it lights up but shows the red flashing LED. After following the guide I found the 47uF 400v and 2200uF 16v caps swollen, ordered up a full set of Panasonic FR caps for £12 and going to see if I can get it going.

I'll keep you posted on whether its operational at the end of the next week.

Thanks for your write ups and advice, most helpful.

[Rich2371]

Re: Troubleshooting B&W Original Powersupply

Hi just joined this forum, I need help with an Zeppelin ( early MK1) my Red led is on not flashing, I've replaced all six caps ( two showed signs of stress outer casing s wrinkled) but it still the same just a constant red led on (Stuck in standbye)? Checked all three fuses all ok�� .
Any ideas please, thanks��

[volcanotop]

Re: Troubleshooting B&W Original Powersupply

Hi,

Which are the suspect caps here? Not as obvious bulging as id have expected.

The two small ones between the two larger?

Thanks

[stj]

Re: Troubleshooting B&W Original Powersupply

they probably shouldnt of named it after something that went up in flames!

[volcanotop]

Re: Troubleshooting B&W Original Powersupply

Good thread. Very grateful to find this. I've got an original B&W zeppelin with the red flashing light problem. it went back to B&W once in ~2014 for a free fix under warranty. But the problem has resurfaced. Maybe bad/cheap components? or maybe a poor design. I don't know. it you look on ebay there are dozens of broken Zeppelin listed.

If anyone else follows this path. As of emails I has with B&W in Feb 2020 they no longer offer support for the original Zeppelin. (previously there was a £80 B&W repair service as i understand).

So its a DIY fix or the Zeppelin goes in the bin.

When it works the sound from the Zeppelin is FANTASTIC. So I've ordered some capacitors and solder and will give the fix a try and hope my soldering skills are up to the job.

[granted]

Re: Troubleshooting B&W Original Powersupply

Great thread! I'm also repairing my Zeppelin and in my case the Rubycon 2200uf 16V capacitor was bulging and the T-fuse had popped.
And the white silicone whatever will be replaced!

[exee]

Re: Troubleshooting B&W Original Powersupply

Wow! Using this thread and the iFixit guides https://www.ifixit.com/Wiki/How_to_R...f_the_Zeppelin and https://www.ifixit.com/Guide/How+to+...Zeppelin/55158, I was able to replace the 2200uf 16V and 470uF 16V Samxon caps (whose tops were inflated and didn't test out) with Panasonic FRs from Mouser and it is working. I had a lot of trouble desoldering the caps and in the process destroyed the solder pads, so I didn't think I was able to solder the new ones in well, but I put it back together and the Zeppelin is working so I must have managed it! I have not been able to get the covers back on completely... For anyone else who tries this, be careful to desolder without destroying the solder pad (wick worked better for me than pump) and make sure you note the polarity and the stripe on the cap so that you get the new one in correctly. If anyone has any advice on how to get the covers to snap into place, I'd appreciate it. Thanks to all (Delirious, sti, Khron, Capleaker, budm, phil - all of whom posted helpful info).

[Hotdog]

Re: Troubleshooting B&W Original Powersupply

Hi Delirious
What actually was wrong. you wrote in your latest post that you did fix it.
Thx :-)

[andy007007]

Re: Troubleshooting B&W Original Powersupply

I have the red light flashing, took mine apart and can't see any swollen damaged chips caps anywhere. Help

[philo]

Re: Troubleshooting B&W Original Powersupply

Panasonic capacitors are part of the top greatest capacitors manufacturers along with Nippon Chelmicon, Rubycon, Nichicon, etc.

[Delirious]

Re: Troubleshooting B&W Original Powersupply

Thanks I will go with the Panasonic FR as you recommended.

[stj]

Re: Troubleshooting B&W Original Powersupply

usually not needed.

[Delirious]

Re: Troubleshooting B&W Original Powersupply

Would it be wise to replace the two 47 uF 400 VDC capacitors on the AC side as well?

Budm: Well I guess I got quite lucky compared to you.

[stj]

Re: Troubleshooting B&W Original Powersupply

Thanks!

So are you saying I should use lets say Rubycon ZLH for all the caps I replace?

no, i meant match them all.
i just wonder if it matters because they used all different types.

if it's not important then i would just stuff it full of panasonic FR series.