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Update
Today I received the replacement Laser Pick-Up for the BeoSound 9000, and placed it.
And the good news is, it works again!So after all checks, tests and cleaning of lenses and mirror, it was the laser unit that did not function well.
My gratitude goes to Ralf Gerner of Gerner Electronics / Lasertrader.de who helped me pick the correct replacement parts. Great service and quick shipment.
Still one issue?
As said the BS9000 plays CD’s again, though one thing still disturbs me. Just before it starts playing the selected CD, the display shows the message ‘CLEANING REQUIRED’.
It surprises me, since the whole Laser/lenses/mirror is completely new and clean.
Questions
- Is this maybe an old notification that has to be reset?
- If so, how do I do that?
Solution / cause found
The issue was caused by the left cover panel of the sledge. After re-assembling it, I did not put it back the right way. Causing it to be too high to make the sledge move all the way to the end at the 6th disc.
This cover panel has two clamps (see picture) that need to grasp on the edge of the PCB that it covers. If they are positioned right, everything fits well and the sledge can make the normal movements.My advise for re-assembling after working on the BS9000 laser unit is to put this cover back, and then immediately hand-move the sledge all the way left and right (while the sledge is still unblocked). This prevents that you find out later and you have to disassemble and re-assemble again.
I have disassembled the laser/lens/mirror unit, and did a cleaning according to the instructions by japcast in his video on Youtube. By the way, this is a great instruction video!
I did find after disassembly and uncovering the mirror, that it was very dirty. Look for yourself:
After cleaning and re-assembly I did a CD play test, unfortunately with still the same error as when I started.
After that I did a TestMode run #27 again. Interestingly with some different results than when I did this run before cleaning. Here’s the differences:
Before cleaning:
- NO ML ERROR
- 1 IIC ERR104 = The 35IC2 motor processor
- 1 CD ERR 2 = Focus error, it has not been possible to find focus.
- NO SER ERROR
- 1 SLG ERR 31 = microprocessor 35IC2 cannot register pulses from 9PE1.
- NO PLT ERROR
- 1 APS ERROR 15 = it has taken more than 5 seconds to carry out auto positioning. The turntable motor driver might be defective.
After cleaning:- NO ML ERROR
- NO IIC ERR
- 1 CD ERR 2 = Focus error, it has not been possible to find focus.
- NO SER ERROR
- NO SLG ERR
- NO PLT ERROR
- NO APS ERROR
So, it’s positive that most errors are gone. Though a pity that it still doesn’t play.
My questions
- I guess there is only one thing left; replacing the laser/lens/mirror unit. Correct, or are there still other possibilities?
- If I need to order a replacement laser/lens/mirror unit, where can I find it? And where can I trust it is the right one and working? (I need it for a BS9000 MK2, type 2561)
I have come to the point that I have disassembled enough to have full access to the laser unit.
What I noticed is this part …
The middle:
The outer ring:
Question 1
It is very dirty. I think this is just the clamp and the dirt does not affect the laser/reading of the disc. Is that right?Laser unit
I have uncovered the laserunit. What I can see is the lens, which I will clean with isopropyl.Question 2
Besides cleaning the lens here, is there anything else I should clean?Thnx @Pestria !
Since I am new to the BS9000, where can I find the two sensors you talk about?
Are these like this (see picture below)?
But I guess the sensors themselves are underneath?
