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Beosound 9000 Mk1 Dead

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Doug
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Doug posted on Wed, Jul 5 2017 5:26 PM

I have recently become the owner of a Beosound 9000 Mk1 (Model 2523).  It has very good physical appearance but is completely dead on the electronics.  I have opened it up and found this:

The standby light is not lighting.

The transformer is putting out about 10 VAC

The 3 fuses are all good.

There is about 4.8 VAC on BOTH sides of the fuse "sockets".  That seemed strange to me.

I followed the trouble shooting guide for a Mk3 and removed several of the ribbon cables.  I did not get any standby light.  Was I to remove each one individually and then reinstall it or pull the all off?  I did each one individually. 

I suspect that there is no DC voltage being created anywhere on the power supply but I do not know where to take test measurements.  There appear to be enough differences between the MK1 and MK3 that I could get in deep trouble without the right manuals.

So my options are:

1) Hang it on the wall and let it look pretty.  Tell stories of how it would operate if it was not dead.  That would make me sad.

2) Hope for a miracle answer and simple repair from this forum.  That would be great.

3) Send it to B&O and spend the kids college fund getting it repaired.  That would make me poor.

4) Some option I have not considered?

Thanks!

 

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Saint Beogrowler
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Saint Paul, Minnesota
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5) sell on eBay as, "untested. I don't have the proper cords" and then buy another one.

Peter-

MediaBobNY
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Hopefully that's a joke.  Sell it on eBay as a 'Parts or Repair' unit.  Then buy a working Mk III unit.

Saint Beogrowler
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Yes joke. It's painful all the listings where people say they cannot test B&O gear but have a dozen or more B&O items listed.

Peter-

Beobuddy
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Take out the ribbon cable between the powersupplyboard and motorcontrol. 

It's a cable about 15cm long and a thicker one than the rest. 

Does the standby led work again?

If not, then your powersuppy will be defective. 

You can send it over for repair. 

MediaBobNY
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Beobuddy:
You can send it over for repair

Don't even think of sending it overseas for repair.  Feel free to send me a PM for a local service center.

Beobuddy
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Beobuddy replied on Sun, Jul 23 2017 12:50 PM

Just the powersupply I meant. No big deal. 

And in case with use of a original shipping box, that happens also on regular base. 

These items were send worldwide in a an original box. 

Beobuddy
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Beobuddy replied on Sun, Jul 23 2017 12:58 PM

These local servicecenters often don't have the knowledge, parts or readable diagrams to fix the powersupplyboards. 

I often receive boards where they made several attempts without succes. It then starts first by fixing the added damage by them before fixing the original culprit. 

Maurice
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Hi Doug 

I have copies of the wiring hard diagrams for BS9000 Mk 1 dont try to do to detailed fault finding with Mk 3 Diagrams the Mk 3  PCB 3 power supply is a different beast to a Mk 1.

you mention that the 3 fuses are ok  on PCB 3 and you have approx 10VAC on P17 am i right in assuming you still have PCB 3 still in place?  if so you need to take a deep breath and photo in as much detail as poss the connections onPCB 3 if its in situ you will only see about half of them.  as it needs to come out to measure some basic voltages. 

let me knowyour location and where you are regarding the state of the item eg how far is it stripped down.

regards Maurice

Maurice
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Hi Doug 

I have copies of the wiring hard diagrams for BS9000 Mk 1 dont try to do to detailed fault finding with Mk 3 Diagrams the Mk 3  PCB 3 power supply is a different beast to a Mk 1.

you mention that the 3 fuses are ok  on PCB 3 and you have approx 10VAC on P17 am i right in assuming you still have PCB 3 still in place?  if so you need to take a deep breath and photo in as much detail as poss the connections onPCB 3 if its in situ you will only see about half of them.  as it needs to come out to measure some basic voltages. 

let me knowyour location and where you are regarding the state of the item eg how far is it stripped down.

regards Maurice

Doug
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Doug replied on Mon, Jul 24 2017 9:39 PM

I have not tried to remove the power supply.  I can see that much of the board is hidden under the metal plate still.  And it looks like the clamper and all has to come out to get to the rest of the board.  I definitely could see that the mk3 board is different from the mk1 so I have not tried too much trouble shooting with the mk3 diagrams.  I was hoping to get mk1 specific advice/diagrams before getting into detailed trouble shooting. 

I am located in Minneapolis.

Doug
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Doug replied on Mon, Jul 24 2017 9:39 PM

I have not tried to remove the power supply.  I can see that much of the board is hidden under the metal plate still.  And it looks like the clamper and all has to come out to get to the rest of the board.  I definitely could see that the mk3 board is different from the mk1 so I have not tried too much trouble shooting with the mk3 diagrams.  I was hoping to get mk1 specific advice/diagrams before getting into detailed trouble shooting. 

I am located in Minneapolis.

Maurice
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Maurice replied on Mon, Jul 24 2017 11:25 PM

ok after sucessfully deleating my next reply in short you need 5V at PCB3 plug P16 pins 1-2 which connects directly to PCB5 plug P83 pins 1&2 5V theres a fuse F1 which needs checking PCB 5 is immeadiatly next to the sledge cable pully  at position CD1 under a plastic sheild and  under the aluminium  top panel and has the mains voltage cables x 2 connected to it. you need to move the cd mech away from position 1  if necessary by removing the rear metal panel note the ground connectors and how many of them and then rotate the white plastic drive gear to release the clamp and allow it to move ENJOY ! lots of screws

regards Maurice

Doug
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Doug replied on Tue, Jul 25 2017 1:30 PM

The sled moves freely so I can get to the plastic cover.  It does not seem to want to come off.  Do I need to remove the back and unscrew the plastic cover or should it just pop off from the front?

Maurice
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its screwed on from the fronr if memory serves me correctly  you can gain more access undoing the four screws on the transformer.

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