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Call Out To Beomaster 8000 Owners

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sonavor
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sonavor posted on Mon, Feb 22 2021 4:41 PM

Hi fellow Beomaster 8000 owners.

As an owner of two fully restored Beomaster 8000 receivers I know how well they perform. My two receivers have been working flawlessly for quite some time. My first Beomaster 8000 has been operating since 2013.  My second one since 2019.

While I have enjoyed my Beomaster 8000 receivers I know of four where the Beomaster units have exhibited some very unusual behavior. 

The reported problem some owners are seeing is the Beomaster 8000 will sometimes turn on (usually to FM preset number 2) from Standby mode by itself.  At first we thought the problem was just some anomaly.  However, the problem persisted for the small group reporting it.  I have been talking to these owners about this problem since 2018 and the problem appears to occur pretty regularly for these Beomaster 8000 units.

I have had one of those problem Beomaster 8000 units in my workshop before. After testing it for three months I could never get the problem to appear.

It would be easy to assume then that the problem has something to do with electric power in the regions where the problem occurs but we have done plenty of tests to rule that out.

My suspicion is that the problem is related to the remote control receiver circuit in the Beomaster 8000 but so far, swapping power supply boards (which have the remote control circuit on it) has not resulted in any change to the owners with the problem.

I would like to know if there are any other Beomaster 8000 receiver owners besides the four I know about who have experienced this problem.  The four owners that I know have the problem are two Beomaster 8000 owners in Canada (they reside on opposite coasts from each other).  One owner in the USA.  Then finally, one owner in Australia.  So the problem is pretty spread out.  I am curious to know if this problem occurs in Europe, Asia, Africa or South America.

Thanks,
sonavor

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sonavor
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Hi Christian,

Are you saying that your experience with the problem is only within the first few minutes of plugging the Beomaster 8000 into your mains power?
When the Beomaster is left plugged into your 220V mains for lengthy periods of time it doesn't exhibit the auto-turn-on problem?

That is different than the four Beomaster 8000 units I reported about. On those Beomaster units they are always plugged into the mains. They periodically come on by themselves (usually FM 2).  The owners then press the "O" Standby button again to turn them off.

I will restate that my purpose for this post is to gauge how prevalent the problem is among Beomaster 8000 owners. So far it confirms that the problem is very rare.
One concern I had was how risky it is to restore a Beomaster 8000 with regard to encountering this problem. I feel that the risk is extremely small given the responses so far.

John

sonavor
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Spassmaker:

A little bit Off topic does someone  noticed the Balance Display glimming parallel to the Volume Display after installing new SMD LED's?

If yes did anybody solve this issue?

Thanks for advice.

Kind regards Christian

Yes, this is quite common. The SMD replacements are slightly brighter I believe. You also can only dim them so far with the trimmer on the Display board before reaching a level that interferes with the +5VDC power...at which point the Beomaster 8000 won't function.

I should probably spend some time to see if I can find a different SMD replacement LED to use but I haven't done that yet.

John

 

Spassmaker
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This is what I ment, as I remember so far is that the Amp, after connected to mains AND switched ON within the first minute, the unit shut down after a few minuts like it switched on when just conneted to mains...

hope you understand what I mean ;-))

Best regards

Christian

Spassmaker
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Had one Beomaster with new MD LED´s and changed all current limiting resistors , changed the value for the 5 Volt trimmer, changed both LED driver IC´s and the 3 darlington transistors, had no success so far,

as you wrote, if you go to far down with the 5 Volt it doesn´t function anymore 

Had another conversation with scope measurements of the PHASE 1, 2 and 3 opened. but seems sometimes normal with the new LED sometimes not. Had 4 BM 8000 refurbished 2 without that glimming 2 with glimming, always same type of LED.

To read here: https://forum.beoworld.org/forums/p/45494/329001.aspx#329001

Maybe we get too crazy about that kind of perfection Crying

Kind regards

Christian

AdamS
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AdamS replied on Thu, Feb 25 2021 1:34 PM

My Beomaster 8000 started randomly switching itself on (always to FM P3) a few years back when it was in regular use in the dining room.

A certain Mr. Jarman told me to check two things - firstly make sure that it wasn't sitting in direct sunlight as this can sometimes activate the remote sensor. It was at the back of the room and well shaded, so this was not the issue.

His second suggestion was to change the battery in the remote handset as he said that, as these run down, they can cause the handset to do odd things, including sending our random commands on its own!

I changed the battery - no more problems.

This was a relief as, the first couple of times it did it, my wife was away and hearing random talking late at night in a house in the middle of nowhere in the countryside when you're on your own is a bit unnerving!

sonavor
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Hi Adam,

Thanks for that information. The remote control functionality has always seemed like a prime suspect for this problem I have thought. It is the only item other than the keypad that initiates a source to be switched.

John

sonavor
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Lee:
It was always a FM source. I think it varied which program though. It’s been that long since it did it that I may be miss remembering. I’m sure Rudy wrote a post about this on your blog.

 

Hi Lee,

I finally found Rudy's post that I think you are referring to here.
The last I heard that Beomaster 8000 unit is one of the four this Beoworld Post of mine refers to with the continuing auto-turn-on problem.

John

sonavor
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Texas, United States
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Spassmaker:

This is what I ment, as I remember so far is that the Amp, after connected to mains AND switched ON within the first minute, the unit shut down after a few minuts like it switched on when just conneted to mains...

hope you understand what I mean ;-))

Best regards

Christian

Hi Christian,

So your problem is the opposite of the auto-turn-on then.
Your Beomaster 8000 issue sounds more like this issue Rudy posted on the Beolover Blog. 

John

 

avensis18
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Hi, personally i never noticed this.

sonavor
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avensis18:

Hi, personally i never noticed this

Thanks for responding.

Have you had your Beomaster 8000 in service long?  

John

 

sonavor
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Texas, United States
3,635 Posts
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AdamS:

My Beomaster 8000 started randomly switching itself on (always to FM P3) a few years back when it was in regular use in the dining room.

A certain Mr. Jarman told me to check two things - firstly make sure that it wasn't sitting in direct sunlight as this can sometimes activate the remote sensor. It was at the back of the room and well shaded, so this was not the issue.

His second suggestion was to change the battery in the remote handset as he said that, as these run down, they can cause the handset to do odd things, including sending our random commands on its own!

I changed the battery - no more problems.

This was a relief as, the first couple of times it did it, my wife was away and hearing random talking late at night in a house in the middle of nowhere in the countryside when you're on your own is a bit unnerving!

I have and update...

I checked with a couple of the owners that are in the group of four Beomaster 8000 units that are experiencing the auto-turn-on problem.
They had already tested their issue with the remote control out of the equation. Either in a drawer or batteries removed. The problem remained.

I am still waiting for someone with the problem to try removing transistor 6TR26 and see if that solves it.  That will disconnect the BM8000 remote control receiver circuit from the Microcomputer board. 

John

 

Lee
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Lee replied on Sat, Feb 27 2021 1:30 AM

Yes I have noticed that. But the original LEDs did it too although much less bright so only really noticeable in a very dark room.

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