Yes, I have.

I have found the upper tweeter wears out. You can test by carefully muffling off the lower Tweeter with a soft pillow or cushion and play a high frequency sinewave track through 1 channel. This will identify if you are getting equal sound from each.

I found that one upper tweeter had gone - and as a matter of caution (the Tweeters cost relatively little), have the Service engineer replace both. This ensures equal sound and not having to do it again at £200/hr!

I've done dozens off these and the BL5's are becoming a bit risky, to say the least.

@ Marexy. Change both 2 modules at the side of the chassis with each other. If the problem travels from the upper bass to the lower bass, then you know that it is an amplifier problem.

If the problem stays at the same driver, then the problem might be the mute section or lies in the filter section.

Btw,  tweeters are very costly nowadays.

Thanks a lot for this. I think my upper tweeters work great. I just noticed the upper bass / mid range driven (the one exposed at the level of the larger acoustic lense on the large aluminium disk) doesn’t tend to produce much sound even if I put my ear fairly close to it. Much of the speakers sound seems to be coming from the 2 bass drivers and the tweeter.

Double post...

 

Hi Beobuddy

Done that..and yes as you guess, it is amp modue fault.

So i am looking for IcePower 1000A Mk2 module.

Or shematics for repair, as Icepower company DK does not  share shematics sadly.

It is interesting that BL5 share some vital parts with BL7.4 and BL1

 

There are no (public) available diagrams. That makes them hard to repair. If something goes wrong during trying then it can go severe wrong due to the strong power supply driving them.

The modules aren't manufactured and sold anymore. I don't expect that they will make another batch off modules due to the limited specifications off these and it probably only will be to replace defective ones.

I've managed to fix a number of modules and am working on reverse-engineering back to drawing diagrams for future repairs. I've invested in a sincere amount of a money in special power supplies, differential probes, electronic loads, parts, etc. to get them fixed. But, agreed,  with original diagrams life would be much easier.

If you're searching for a quick fix, then I would suggest that you look for a cheap BL2 and take out the module in that one.

At first glance there seems to be some resemblance but there are difference (BL7-4). I don't see that with the BL1, other that it has also an ICE powered section for the bass. Mid and high are driven by Class-B amplifiers.

Hi

Thanks

As i am in electronic rapair / not as much as you / but i hope i can repair.

Tweeter have almost same amp as in Beolab 7.4 .

Bass modueles BL5 are 2x IcePower 1000A MK2.

Bass module in BL2 is 500w type.

Tweeters are from ScanSpeak as far as i find out.

upper bass is the same as BL1..if not mistaking.

I have now ordered new IcePower 1000A MK1 And will check if will be ok.

BBiggest issue at BL5 i see on SW -PCB.

Here i can not see any option but only original.

 

Ad I already mentioned. BL2 and BL5 have the same modules. The 500W modules differ in connection sockets

The lower and upper bass from the BL5 are the same. Both Class D as the bass from the BL1. Design wise different boards and components.

If you’re able to order a new ICE 1000W module, not the stil available 500W, then you probably luckily solved this issue. As changing the modules for the bass made difference.