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
