ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hello,
I have recently purchased a non-working Beosound 9000 (#2562) advertised as not powering on and have attempted to fix this. Initially I was optimistic but I’m now stuck and cannot see a way forward
Initially the system would not power on and had no standby light. I checked through the error tree in the manual and found no 5V power being produced in PCB34. I traced this back to a failed diode D9 which I replaced and then the system would power up. After powering up I began testing the systems, radio worked, lid worked but then I found the CD player slide front face would rub on the top plate so I checked the player orientation adjustment on the back of the unit and these were set correctly for horizontal mounting and then adjusted the screws on the back of the top clamper face then this would pass the CD locations without catching.
I then moved onto attempting to play a CD but the cd clamper would impact the CD's when moving to their position, upon investigation the top of the clamper would not unclamp and would always stay shut. I checked and clamper motor was receiving power and rotating the clamper mechanism but would not unclamp as magnet securing top clamper to spindle appeared too strong. I then moved onto look at the bottom rocker arm that moves the laser tray up and down and straightened the rocker arm and padded out the silicone sleeve to adjust for wear. This was enough after reassembly to allow the clamper to now engage and disengage. I ran through test programs 71/73 with no issues and attempted to play a CD.
When attempting to play a CD the sledge would move to a CD correctly and go through clamping routine but CD would not actually become clamped to the lower spindle and when motor activated CD began to spin up CD would jump from spindle and become unbalanced and jump around!
When reviewing clamping mechanism, I could not see how the CD would be physically clamped to the bottom spindle. Below is cross section of clapper with CD on spindle in current situation. I might be missing something here so would appreciate some support in confirming how the CD should be clamped when player is working correctly. Below are images of current situation and how I think it should look like.
I have had a looked-for images of the upper and lower clamper on the internet. I see there appears to be a design change at some point where the lower spindle had a recess added to allow to top metal of the clamper to locate into the lower spindle magnet and locate.
My lower spindle has no recess and magnet is flush with top face of spindle. I’m thinking maybe someone swapped a later MK3 top clamp arm on an old MK2 lower carriage and this is the reason for my issue. Hopefully someone can help me with this, it’s probably something obvious I am missing 😊. Thanks for the help.
Mike
Hi,
sorry to hear you're having troubles. Based on your description and a look at one each of my MK I and MK III units that your are correct. The "holder", or tachowheel is from a MK III.
Good luck,
Bill
Thanks Bill,
So someone changed the tachowheel or top clamp arm on mine to the latest version which is incompatible with the older version bottom motor spindle. This could also explain why i was initially having a hard time to get the mechanism to unclamp if they are slightly different. image of the tacho wheel i currently have
I have attempted to add cardboard shim onto the CD before clamping and this helps clamping but the tachowheel metal part dose not remain centered on the spindle as there is no recess to allow it to locate.
I cannot move onto confirming the laser without getting the clamping mechanism right so will need to look for an older position tachowheel. Spares seem hard to come by now.
I will have to keep a look out for an old version top clamp arm or tacho wheel. Maybe ill have to buy another complete beo 9000 and keep this as spares. Im not sure what else i can do.
Thanks Again,
mike4466:I will have to keep a look out for an old version top clamp arm or tacho wheel. Maybe ill have to buy another complete beo 9000 and keep this as spares. Im not sure what else i can do.
Hi and welcome to Beoworld.
Sorry too to read about your problems.
Maybe I've missed something, but what I understand is that the top part dont fit the bottom part. And the bottom part must be CD mechanism.Wouldn't it be possible and easier to find that part which must be a common part. Maybe more than the right clamper alone?
If you're able to identify visually what should look your cd spindle and comparing with the various pictures of stripped BS9000 over the internet, maybe you can find a good one similar on eBay.
If you take out the APS disc and place it on top of the spindle motor (with a cd between them), then the cd should be held firmly in place by the APS disc, without space.
The mk3 with the VAM1250 has a different APS disc than all the other used cd-mechanisms. I think I might have discs laying here around.
Afternoon BeoBuddy,
Please see image of current clamped disc on spindle. with gap between CD and clamp. Also below is current laser spindle assembly VAM 1205.
It would be a great help if you could supply me with appropriate disc. I live in the UK and will pay you buy paypal if do have one you are willing to sell.
Current controller card PCB40 is number B6142788. To confirm is this the correct card for VAM 1205?. I have ordered replacement CDM12.4 laser assembly as i am still getting CD error 2 when attempting to read disks even with bodge shim in place. Is there any compatibility issue with the encoder reader for the top discs?
Thank for everyone help.
Found one.
Try this one first. The behaviour from tthe BS9000 can sometines be a bit unpredictable.
PCB 40 is used in combination with the VAM1205, which can be replaced by the CDM12-4.
Hi Mike,
I had similar problem in the past. I got laser mechanism very similar to the right one but that part ( below) was slightly differenct and disk was unstable.Please look for dfferent laser mechanism
Picture