[Madskp]

Dillen wrote:

And use ESD-protection! These things are highly sensitive to static electricity. Many owners experience that new lasers don’t work, – and while it is correct that many asian “counterfeits” won’t work, or only work for a few hours, many lasers are damaged by static electricity, – either during shipping, if shipped without shorting clamp and/or ESD-shielding or by handling without taking proper ESD-precautions. I have seen many of both cases. Martin

Hi Martin and thanks for the warning. I have a grounded antistatic mat and wristband ready so I hopefully won’t fry the new module in the proces

Location: Denmark

[Madskp]

auric wrote:

Hi: Watch this video
Go to 5:45 mark. Derek

Hi and thanks for the video link. It seems though that on the unit he is working on in the video he is removing a plastic bracket which gives acces to the other guide rail. But on the on from the BC9300 that both the guide rail and the overhanging “bracket” is part of cast metal, so there is no way to get the laser module up in that side of the mechanism.

As I see it the only way is to remove the white gear, but I am very open to other suggestions

Location: Denmark

[Madskp]

Yesterday I was visiting my parents, and short before I had to leave I helped them force quit an app on their Apple TV 4K (3rd gen). They have never used the Siri remote as the control the ATV via PUC from their Beoplay V1. But in order to force quit the app I had to use the Siri remote.

First thing that happened when I touched the home button on the Siri remote was that the Beoplay V1 switched to source TV (their apple TV is on V.MEM). I tried again a couple of times and the same thing happened. When I covered the IR eye on the Siri remote this did not happen, so it seems that the IR control with B&O remote codes are back in the 3rd gen Siri remote.

Unfortunately I was in a hurry to get home, so didn’t have time to do more tests. I will do more testing the next time I visit them and in the meantime I hope that other members are able to use this. My guess is that the functionality is much the same as in the 1st gen siri remote as described in the first post in this thread and in the old post.

 

Location: Denmark

[Madskp]

Millemissen wrote:

However, this is only so, if the ‘3 black boxes’/the Beolink Passives have a SW 1.5 or higher. Please see Guy’s post in this thread: #14907

The solution with the 1611 converter should still work even if the Beolink Passives are SW 1.3 with the only exception being that the A.AUX command will not work.

All other audio and/or video commands listed on the diagram in Guy’s post in this thread should activate the Audio Aux Link port on the 1611 converter for Audio or video sound respectivly.

Location: Denmark

[Madskp]

B3OHACK3R wrote:

If you want to dig into it using an MCU I can recommend starting here. It supports IR and datalink so should be usable for PL data as well I guess. https://github.com/Arduino-IRremote/Arduino-IRremote/blob/master/src/ir_BangOlufsen.hpp#L4 In the end you don’t have to understand or reverse engineer the data protocol at all. Just record and replay what comes out of the W1 PL data pin. So any software that can record and send raw IR data will work. For the sending part just make sure to switch of any carrier frequency.

Thank you, I will try to dive in to that when I have some time on my hands. Always great to have a starting point to learn from.

Location: Denmark

[Madskp]

Hello and thanks for the input.
I don’t have any experience with logic analyzers but might try to dip my to into it.

This project might actually have a tool I can use (bullet number 3):

https://github.com/jensjoachim/B_and_O_Projects

It might take some time before I get to it as I have some other projects going at the moment and not much spare time.

thanks again for the input

Location: Denmark

[Madskp]

pilatomic wrote:

Slowly reverse engineering the Datalink protocol used between the BeoMaster / BeoCord / BeoGram 5500, for a secret project.

sounds very interesting. Looking forward to more info.

Are you avare of these two projects?:

https://github.com/jensjoachim/B_and_O_Projects

https://github.com/toresbe/datalink

Location: Denmark

[Madskp]

Madskp wrote:

So my guess is that to use the BM4500 as a slave unit it should be conencted to a Master unit via the AUX socket. However a normal Audio Aux cable can not be used as this will connect Audio in to Audio in and Audio out to Audio out. I have to make a crossed cable and do some more testing. update will follow

Finally got some time on my hands to make a Crossed Audio Aux cable to be able to test the BM4500 as a slave with another non Masterlink Beomaster.

The cable pinout looks like this:

The inputs and the output are switching places whereas the data and the ground pins all connects to the corrosponding pins on the other connector

I used a Beocenter 9300 as the Master unit (set to option 1) and the Beomaster 4500 as the slave unit (set to option 1.6).

A picture of the setup

And it works :-). I can control the radio channels on the BC9300 from the BM4500 when I use Link + commands.

Next up I wonder how it will work if MCL2 link rooms are connected to the speaker 2 connectors on the BM4500. I guess there must be some kind of limiting factor somewhere since B&O says that option 6 must no be used.

 

Location: Denmark

[Madskp]

Just to let you know a fellow Beoworlder offered to take over the project in exchange for some spare part to other projects, so I have choosen to focus my time on these instead of trying to revive this BM5500 myself.

But thank for the input

Location: Denmark

[Madskp]

Rolf2 wrote:

You may check the sw version of your BM. Talking about options 5 and 6, those were only available in earlier 1-way versions. 1-way function only had been included in the BM 4500 with a sw version below 2.1.

Thanks for responding. I was not aware that the BM4500 also had been in a one way version initially. Interesting.

Mine is labeled SW 1.6 on the back, and looking at old forum post I can see that when the 2 way communication was introduced in SW 2.1 the ability for the BM4500 to act as a ML slave was removed. Thus I’m pretty sure mine is a software 1.x even if it has had a software upgrade along the way.

This fits me fine as I have no 2 way remotes, and for my use case it could be great to have it act as a link room in the setup.

Jus to see that this function actually worked I connected it to a BS Ouverture via a Beolink 1611 converter. With the BM4500 in option 1.6 and the Ouverture in option 1 I cold start the sources on the BS Ouverture from the BM4500 with the use of link + Audio commands while both units would still use local sources with normal audio commands. Great 🙂

 

Location: Denmark

[Madskp]

Madskp wrote:

I wonder how the BM4500 should be able to work as a slave in a MCL2 system connection wise as it does not have the MCL input as the MCL2AV has? It sees wierd to be mentioned in the manual if the product is not hardware wise ready for it.

A quick test to see what happens when using option 1.6 or 2.6.

When the BM4500 is in option 1.5 or 2.6 it will not react to Link + audio commands.

But when I set it to option 1.6 or 2.6 all Link + Audio commands activate AUX on the BM4500.

Further more the schematics in the service manuals show the data pins on the AUX socket and the speakerlink (MCL2) sockets are connected so all signals are passed between these two sockets.

So my guess is that to use the BM4500 as a slave unit it should be conencted to a Master unit via the AUX socket. However a normal Audio Aux cable can not be used as this will connect Audio in to Audio in and Audio out to Audio out.

I have to make a crossed cable and do some more testing. update will follow

Location: Denmark

[Madskp]

Ok that makes sense. just being curious about the usecase for that connection

Location: Denmark

[Madskp]

Great to hear that it is now working ?

I am wondering though why you would need this connection when the speakers are connected to the Beoport. This connections is not shown in the manual for the Beoport and the audio out port was originally blocked with a label from the factory

Location: Denmark

[Madskp]

Hello

just for clarification, do you use the audio out minijack socket on the Beoport for this connection?

And also, do you not have speakers connected to the Beoport powerlink ports or headphone jack?

one simple test to try if you haven’t allready done that would be to connect another source to the line in socket on the PC just to check if something is different

Location: Denmark

[Madskp]

Hello and welcome to the forum

The 1656 Beolink Passive should work just fine for your purpose. One important note is that you need a fully wired powerlink cable between the ouverture and the 1656 for it to work.

you might also be able to find the box named as ML-MCL converter with a different type number. It is the same box, it can just be used for other types of setups also. If an Ir eye is bundled with a ML-MCL converter you wont need that in your setup.

hope this is helpfull

Location: Denmark

[Madskp]

Ok so I removed R34, and the relay was not clicking when I turned it on.

what I probably didn’t notice after the last incident was that there was no light in the display anymore.

I could meassure 5V supply to the display board.

And then I looked  away for 2 seconds and fireworks started in the back of the amplifier.

From what I can see two of the big grey resistors has burn marks

Unless anyone thinks this is fixable I think I will let this BM5500 rest in peace.

One side note. It is a prototype unit with Red labels that my father got when he worked at B&O. I have noticed that there are things that doesn’t line up with what the diagrams show. For example there is a transistor callled TR5 on the display board with connections to two LED’s. This is not shown in the digram

Location: Denmark

[Madskp]

Hello and thanks for the input.

I haven’t touched it since I made the post, but will try to investegate further based on your advice and post my findings

Location: Denmark

[Madskp]

speedsixdave wrote:

Hi all, A quick update on this. I finally have a working MCL connection between the BC9500 and BL3500, after some shenanigans and possibly killing some of the display on the BC9500 (see seperate post). It really was as simple as making a single cable from the 3-pin din MCL speaker plugs to the 8-pin din MCL plug, but as it was the first soldering I’ve done in about 30 years it did not go smoothly. Eventually I realised I had a short between the pink (DC) and yellow (left signal +ve) pins (via the metal DIN casing) and now the thing seems to work ok. As Mads pointed out the pink wire does nothing in the BL3500 so the fact that I broke the pink connection in the 8-pin DIN plug while trying to fix a loose green (right signal +ve) connection does not matter. All very much above my skill and dexterity levels, and I have new burns to prove it!

Great to hear you  got it working. The 8 pin DIN plug is a pain in a.. with the thick MCL cable so fully understandable that it can cause problems. Sad to hear that it backfired on you BC9500

Location: Denmark

[Madskp]

you will need a fully wired powerlink cable to activate the MCL2P. That will most likely be the problem

Location: Denmark

[Madskp]

matador wrote:

On question thought: did you manage to get the BL3500, working as it should with the WL1? That mean having it wirelessly connected to a master link master and having the WL1 starting the 3500?

I you refer to what is shown in the Bl3500 user manual I haven’t tried that setup as I gues it will work and is a little outside the scope of this thread.

But to clarify the setup I tried I have modified the sketch from the user manual:

The Powerlink cable has to be fully wire for it to function as it needs both the normal powerlink on signal on pin 4, and the data signal that is on pin 6.

This setup works, but I can’t replicate it with powerlink outputs from BL active, MCL2AV or BS Ouverture, so the data signal from the W1 must be the key for this to work.

Location: Denmark

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