[Madskp]

ballingfisker wrote:

anybody who nows what the readings ( volts ) should be. maybe the microcomputer pcb 3

is faulty.

I have tried to open one of my passives and did some measurements to compare.

One important thing to note.The button on the front is not and on/off button but an off button. If I activate the passive from a B&O musicsystem via Powerlink I can press the button and turn the Passive off, but I cannot turn it on again with the button. On the front of mine it is also named OFF.

ballingfisker wrote:

that is the problem , with only 220v connecet , it is on , the power up is high on p200 pin 8 , and when i connect 5v to
pin 1 on powerlink scoket , p200 pin 8 goes low

This is also how mine reacts, so this should be normal behavior, and also how I think it should work based on the schematic.

ballingfisker wrote:

p200 pin 1 is connecet to on/off switch when i press it it goes low and when
i relece it it goes high .it looks as it is the oppesit as it should be.

The same reaction I see on mine. Also note my comment regarding the button function.

 

 

Location: Denmark

[Madskp]

Just a few cents from me. I have a set of Beolab 4 sepakers and have an accespoint placed relativly close to one of them. If the distance between the accespoint and the speaker is to short (<5cm or so) the Speaker is beginning to make ticking noises. So these speakers are prone to some interference from other things. Btw. I am using original MK3 Powerlink cables (the thin ones).

Location: Denmark

[Madskp]

And just to round this up I have also replaced the three capacitors mentioned in Beolovers blogpost https://beolover.blogspot.com/2021/06/beogram-cd50-typical-restoration-steps.html?m=1 which has also been a great reference in regards to replacing the belt.

Last thing to check is the datalin control which I tested by connecting it to my Ouverture

And it is working just great with full control 😀

Location: Denmark

[Madskp]

TK wrote:

hat said, it may only be possible to have maximum control via the BM8000 IR input. In this instance, the Powerlink cable from the 1611 would go to an Arduino which in turn sent the control signals through an IR emitter, and the line audio output (or input) went through Tape2.  From what little I know about the BM8000, I’ve read that the TP2 jack is fully functional, apart from Datalknk

That makes sense. It is the same way B&O themselves did it  with the MCL Beolab kit that would allow the Beomaster 8000 to be used with MCL82 link room equipment. A. little more on that in this thread if you are interested https://forum.beoworld.org/forums/topic/pile-of-mcl-equipment/#post-62596

That said the need for link rooms with a BM8000 may be down to very few people if any 😉

Location: Denmark

[Madskp]

As for the NL/ML converter settings. If you set it up as a Audio Master you can choose to distribute the Core sources to ML Audio source names like CD, A.MEM, Radio, N.Radio, or N.music  or what ever is easiest to control with the Beoremote one.

Madskp wrote:

Also this can give an extra local input if needed.

The extra input form a Beolink converter 1611 I mentioned before can then be activated with any video command like, TV, DTV, DVD etc.

As for the the Beolab 3500 there can be a few settings that needs to be adjusted depending on how it has been used before. If it has been used in a link room on a ML network before you probably should be good to go without changing any settings.

 

 

Location: Denmark

[Madskp]

Stan wrote:

Since you have no audio or video master on your masterlink side, you need a master link power box. B&O part # 8052447.

You can read more about it on pg 29 of the BeoLink Handbook http://beointegration.com/uploaded/EN-BeoLink-handbook-v1-7.pdf

Alternativly you can use a Beolink converter type 1611. That will also supply the needed power and might even be cheaper and more available. Also this can give an extra local input if needed.

Location: Denmark

[Madskp]

Hve you tried to measure the voltage where you have noted “on”. There should only be voltage there if a Powerlink cable is connected and activated from at Beosystem

Location: Denmark

[Madskp]

TK wrote:

One takeaway to note is that with a little effort, it appears to be entirely possible to make a cheap translation dongle which allows any vintage B&O component to interface with any other vintage B&O component (something one or two people have already worked on).   So one could,  for example, easily make a dongle which would allow a Beomaster 5000 or BM8000 to work with more modern datalink protocols that the 5500-7000 know how to translate.

Do you mean the Datalink 86 protocol so it would be possible to connect to more modern link system (for example Masterlink via 1611 converter)?

 

Location: Denmark

[Madskp]

Be sure to measure the distance between the spindle and the metal plate above before unscrewing it. I have noted a lot of comments in other threads that the distance shown in the service manual is not correct, so better to make it the same as it was.

Location: Denmark

[Madskp]

1.3mm allen key worked for me

Location: Denmark

[Madskp]

I decided to fix the spindle motor and for now it looks like a succes for me

I did a writeup in my other thread about it https://forum.beoworld.org/forums/topic/boegram-cd50-carrige-slow/#post-66138

Location: Denmark

[Madskp]

Had some issues with CD’s not playing or starting 1-2 minutes into track 1.

Reading in this older thread https://archivedforum2.beoworld.org/forums/t/628.aspx?PageIndex=1

It is mentioned that this could be due to the spindle motor not being able to get up to high enough rpm to read the start of the first track which is placed in the inner part of a CD.

It seems like a few people in that thread had luck disassembeling the spindlemotor cleaning and relubricating it.

After trying a few other things I decided to do the same. It was actually easier for me than I thought it would be based on the description in that old thread.

I guess it is down to applying enough force on the motor PCB and pressing the shaft against som metal.

Be aware as mentioned in that old thread that the brass ring that comes of has a chamfered edge that has to point against the motor

The spacers mentioned in the other thread did not fall of on mine so I let them be where the were and concentrated on cleaning and relubricating the shaft and bearing

Pressing the brass ring on the shaft again was actually harder for me than getting it of. It is easily pressed to much against the bearing making the motor hard to spin. I found that placing a guitar plector between the motor housing bell and the PCB when pressing the brass ring on gave just the right amount of clearance.

Aftewards it was just placing the CD spindle in the same distance as before disassembely and the reassemble the CD mechanism.

All in all I used maybe half an hour on this.

The result: Every CD I have tried no starts at 0.00 on track 1. Of course I have to long term test it, but I allready think this was worth it 😀

Next up the non responsive Beocord 5000 to keep the CD50 company

• This reply was modified 3 months, 3 weeks ago by Madskp.

Location: Denmark

[Madskp]

Rob wrote:

Secondly, I was wondering if modern, non-B&O, speakers can be connected to it and how I would go about doing that if so? Also do I need passive speakers or will active ones work as well?

Both passive and active speakers will work. For the passive speakers you will need some 2 pin DIN speaker plugs. You can connect any active speakers with analoginput to the Powerlink connection on the BM7000. You will need an adapter from the 8 pin DIN (as not all pin is needed it can also be a 5 pin din) to either RCA or minijack depending on what the active speaker you connect has for input. Try to look at at the site sponsor Sounds Heavenly webshop. he will have the right adapter for this.

Location: Denmark

[Madskp]

I understand your confussion looking at the manual where the connected active speakers are named left and right. I gues that drawing is just to show how to connect two B&O active speakers with two separete regular powerlink cables. Selection of which speaker is left and which is right is done on the B&O active speaker

Therefor  that setup would also be possible with a Powerlink Y connector only one of the Powerlink connectors on the Beomaster as alle pins in these 2 are internally connected toghther

Hope this helps understand the Powerlink connections

Location: Denmark

[Madskp]

To answer the first question, powerlink has both left and right signals in the same connector. Therefore the adapter type with one DIN connector will work fine.

As for quality differences between the two adapters I am not the right one to tell.

Location: Denmark

[Madskp]

Multicare wrote:

Hopefully this should be resolved.

Fingers crossed it doesn’t break something else 🤞

That seems to work for me now. Thanks 🙂

The reason for needing the acces was that another user asked for a readable servicemanual for a Beolink Passive, so I went there to check, but it seems this is not in the archive yet.

 

Location: Denmark

[Madskp]

I have now tried to lift the Mechanism slightly, and saw an improvement on some CD’s which now starts at 0.00 or 0.03. Tried to adjust the brass know more loosly and that also give this result. However there are still some of the CD’s I am using for testing that starts between 1-2 minutes into track 1, so does not solve every case for me. If I remeber correctly I saw something about CD thickness in one of the older threads. Will have to go back and read up on that

Location: Denmark

[Madskp]

Multicare wrote:

Thats, in the interim you will need to be logged in for it to work.

Ok thanks for the info. The issue however is also present when I am logged in

Location: Denmark

[Madskp]

TK wrote:

Yes, I have one of his BeoTooth devices, and it’s very well made.

I’ll explain it this way: The beocord is able to transmit lots of information about it’s current state over datalink: what track it’s on, what side of the tape it’s playing, how many seconds it’s been running, how loud the recording is, etc. It’s a very “chatty” component.  In the example above, it’s transmitting CassetteInfo, TrackNumber, and Counter over Datalink for the Beomaster to display. Most Datalink 80 messages are 1 byte in length (eight 1’s and/or 0’s in sequence, in specific combinations) , but a few status messages are longer, because more information needs to be passed then can be done in a single byte.  Fore example, when the Beomaster sees the incoming. code for “TrackNumber” it knows that the next 5 bytes it receives will include which track it should display on the remote. HOWEVER! of the next five bytes it is expecting, only the last byte received is ever used (AFAIK) for this particular status command, and of that last byte, only a portion of it is used. So the first four bytes of the message could have been jibberish, but the original writers of Datalink 80 apparently decided to send “00000111”, which is translated as either “UNKN” or “14+” on your B&O display. But in practice it really doesn’t matter what is sent – the first 4 bytes of data is not used for anything, AFAIK.  They could have chosen to send something else if they’d wanted to.

The ‘UNKN’ label is basically the English label Ive assigned for the sequence of bits ‘1111’, or the Hex letter ‘F’.  which also represents the number 15 in computer-speak.  It’s the largest number that can be represented using 4 bits.  This is the primary reason why most older B&O systems only count tracks up to 14. On any higher numbered track, it will show as “14+” which is signifies “Track 15 or higher”, and also “Unknown Track Number”.  AKA “I can’t count any higher than that, because I’ve run out of digits”.

IF the last byte is also sent as “UNKN” (i.e five “UNKN” in a row), then the Beomaster knows that the beocord either does not know what track it’s. on, or the current track number is 15 or greater. The Beomaster  subsequently relays that information to a 2-way remote IR or the console panel, so the appropriate number is lit up. In the example above, the last number translates to a “10”, so solely the information in his last byte will cause the “10” to flash on an MCP panel.

Ironically,  the system already has a means to describe any track number between “0” and. “99999” easily, using the tape counter to transmit current track info.  In the example above, the Counter returns “07270”, which will display as “0727” on the MCP (I think- it might display “7270”, I’ll check later). Pilatomic has implemented this feature using the Status counter in his excellent adaptation.

Thanks for the explanation although I do not understand all of it I can see the logic in some it. Also interesting to see that there is some kind of reason for showing only 14+ tracks on many B&O products 🙂

Location: Denmark

[Madskp]

I belive there used to be a servicemanual for the Beolink Passive in the manual library on Beoworld.

However there seems to be an issue accesing the product pages to check right now. I have made a post to Multicare about that issue.

If the manual is not shown in the library when it is active again try reaching out to Multicare and ask for the manual, as there is still a lot of manuals not uploaded to the library

Location: Denmark

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