CD Not Playing on Beosound 9000

43 replies

Before giving your Beosound 9000 to repair or for laser replacement try at least to clean the laser lens. Now, when the service manual is available it's not a big deal. Simply follow the instructions  1 to 9 on pages 6.4 to 6.7. Be only careful with a clamper arm assembly as the external part goes through the internal one. When you reach the laser lens ( you dont't have to dissassemble the CD mechanism, just the cover) clean it with a microfible for glasses. If you want to use liquid - use distilled water from pharmacy ( for injections) . Don't use any alcohol nor isopropanol as it may damage lens surface.

My last researches about cleaning liquid shown that 30% alcohol with 1 small drop of washing liquid can be used as well.

As far as I know, there no more available spare parts for the  Beosound 9000 MK I coming from B&O Denmark. 

The hardest is to fix MK1, the other MK2...MK3 no problem.
MK1 has a mechanism CDM and 12.6 and on eBay..or like for little money is not easy to find reliable and high-quality lasers.

You have 10% chance that will work.

CDM 12.6 has different ( older )  pcd than other version.

I fix many of them so i speak from my experiance.

In the moment i have 5 units MK1 to fix..and i'm not happy to start with.

Any original upgrade it is hard to find and it is to much money for old unit max 500 EUR worth.

If any one have easy way ...please to share :)

I have Mark III with laser VAM1250. Luckilly I have found on e-bay a Maranz DR4050 having the same laser, it cost me really cheap.
But with my BS9000 I have a problem that sometimes it has difficulty to start playing. Sometimes it spins a CD very very quickly one or other side and then starts playing. Sometimes is waiting and I have manually choose another disk and another until it starts to rotate. Then everything goes normal. It looks like it has to 'warm up".
Based on your experience does it mean that the laser is anyway used up ...or just not cleaned enough ?

1. laser it 's on the end of road... :(..bin it.

2. yust clean it ..outsine and inside lens.

3. sometime you can take vam 12.4 ant it work fine :)

4. if it is laser with vertical laser connection check it.... If it is laser with roud pins...change it.

hope it helps :)

 

 

 

I went back through beoworld topics and found that need for warming up may be caused by cracked solder joints which have to be checked/resoldered.

When you put VAM12.4 do you replace PCB 41 ? or make any other adjustments e.g. for cables to fit ?

Cleaning inside lens - do I have to dismantle something ?

Do you use any precautions against electrostatic ?

When you put VAM12.4 do you replace PCB 41 ? or make any other adjustments e.g. for cables to fit ? ( NO )

Cleaning inside lens - do I have to dismantle something ? ( yes..take the laser head from mechanismus and improvise with toopick and some cotton. )

Do you use any precautions against electrostatic ? ( yap...it is sensitive to static el . )

Because of bad weather outside I had a chance to change the laser mechanism to a one from Marantz as described by me some posts above.
The laser mechanizm was VAM1250 but not exactly as the one in Beosound 9000. The existing laser mechanism has one additional black wire going to chassis/ground and a cover for laser that only lens are visible, the rest seems to be the same.
But unfortunately the new laser didn't work meaning disk didn't spin.

I had to put the old laser back and still have the same problem - when I swich on I have to go from one disk to another until the laser (?) warms up enough to start, then it plays normally. Maybe something else has to warm up not a laser itself an therefore the new laser didn't work.

Any suggestions ?

Just to add - i double checked the laser in Marantz player - works OK. I should add ( solder) to it the extra grounding wire and then carefully assembly the Beosound (initially I too quickly wanted to check whether it works) and try to play. Theoretically as the first row numbers on both mechanisms are the same - it should work. I will inform you then.

Finally I have replaced the laser mechanism again. I looked on laser pickup number in both mechanisms and they are exactly the same 1VC0573  so if not working I should blame the PCB41. I have soldered extra grounding wire and cleaned with alcohol all ribbon wires:  laser pickup, laser mechanism, 2 coming to PCB41 and 2 coming to clamping mechanism. Then I carefully assembled everything back and ......................................... working !!!!!!!!!!!!!!!! Hurrah !!!!!!!!!!

Having laser mechanism replaced and BS9000 working I decided to fix the faulty laser pickup by resoldering all joints.

First I took out the pickup from VAM 1250. You have to take out the big white gearwheel using some force. To release the chrome rail you have to pull out the white clamp, The ending switch has not to be unscrewed but it's a chance to clean it as well.
To get into contacts on the pickup the metal shield has to be removed. It is soldered in two places. To take it out I used desoldering wick. After removal I saw preamplifier chip made by Philips with following description TZA1022 TS; V7247 01;Dn 602092. I resoldered all joints by applying some fluid flux and touching with soldering iron tip. My iron has ca. 220 degrees Celsius so it shouldn't damage the electronics. The chip connections are ultra small so I just crossed them with hot iron. Then I cleaned everything with alcohol and assembled back and put the VAM1250 into Marantz DR4050. It started playing immediately !

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