[radzio222]

Hi,
Some time ago my CD didn’t read ANY discs.
So I found a replacement laser at AliExpress (CDM 12.2).
I replaced the laser and CD Player started to work… With a 2/3 of my CD’s, but still 1/3 isn’t working at all.

His behaviour is 0/1 so one CDs he is reading without any hustle and other he is not reading even ToC.

Doesn’t matter what condition is a disc layer. He can handle really very scratchy discs.

Is it a proper behaviour or something I need to fix?

Usually it do not read newer CDs than the old 80′ & 90′ ones.

[Guy]

I have also just posted the following reply in a thread about a BS3000!

There seem to be lots of CD player problems on Beoworld at the moment – all with very similar era equipment with what may well be the same CD player components. All have the linear (rather than curved) tracking laser head, moving in a straight line across the radius of the CD.

Have a look at this thread for ideas: https://beoworld.dev.idslogic.net/forums/topic/beosound-ouverture-cd-not-working/

… but the four areas I would probably look for a solution are:

• Running the built in Test Modes to see if that ‘frees up’ the CD mechanism (focus and/or tracking) – this worked for me with a BeoSound 1. Test Modes are listed in the Service Manual.
• Deep clean of the laser – advice is given elsewhere on the forum.
• Replacement of SMD capacitors on CD driver PCB.
• Replacement of laser (last resort?).

EDIT: When I got hold of my first BeoSound 1 a couple of years ago, that would only play ‘older’ CDs. After a few weeks of use it’s happier playing newer ones – strange behaviour indeed!

[radzio222]

I found one another crazy behavior of the CD. when I stop playing, laser do not go back to a start position ?

 

Something is not right.

I found also that when i put CD and close a door it is not starting reading the disc, I need to push CD button ?

 

@guy I found some service manual for beo9000, but its lacks service mode for CD. Have only for FM and Deck.

[Dillen]

radzio222 wrote:

I found also that when i put CD and close a door it is not starting reading the disc, I need to push CD button

That’s normal. Closing the CD door should not be reason to f.e. switch from radio, or what else is playing, to CD.
Pressing CD, on the other hand, should.
Martin

[radzio222]

But it doesn’t start event if I’m on CD mode.

[auric]

Hi Guy:

What is your experience with the Philips CDM12 linear pickups?

I used to have Beocenter 2500 (Radial Pickup) and a Beocenter 4000 (Linear Pickup).

I found that the radial pickups will play anything… pressed CDs as well as CDRs with no problems.

The linear lasers seem to be more picky. My BC 4000 plays pressed CDs fine. It doesn’t do well on CDRs even after laser change. It seldom plays CDRs perfectly from beginning to end. Some CDRs are unreadable others will skip near the outer tracks.

Derek

Derek

 

 

 

[Madskp]

Guy wrote:

auric wrote:

Hi Guy: What is your experience with the Philips CDM12 linear pickups? I used to have Beocenter 2500 (Radial Pickup) and a Beocenter 4000 (Linear Pickup). I found that the radial pickups will play anything… pressed CDs as well as CDRs with no problems. The linear lasers seem to be more picky. My BC 4000 plays pressed CDs fine. It doesn’t do well on CDRs even after laser change. It seldom plays CDRs perfectly from beginning to end. Some CDRs are unreadable others will skip near the outer tracks. Derek

Hi Derek – similar experience for me: Both mine and Mother-in-Law’s BC9500s CDs have always played fine with all CDs, as has my early model radial laser BC2300. The linear tracking late model BC2300 that I took out of storage last week is the first CD that I have had major problems with, and I am about to dismantle and investigate further. Also both my BeoSound 1s initially had CD problems but are both now playing well after a light clean and running CD test modes to ‘exercise’ the laser pickup!

Does anyone know if these drive mechanisms are interchangeable, or if other components and/or software versions are required for that to work?

My thinking here is if the linear type is unreliable there are lot of defective systems out there with the other type of CD mechanism to pick spare parts from.

[Dillen]

radzio222 wrote:

But it doesn’t start event if I’m on CD mode.

Still normal.
Press CD instead, – and it will also close the door if open.
Same as with all other B&O CD players.
Martin

[auric]

Madskp, I’m assuming you are asking if the CDM4 (radial) and CDM12 are interchangeable?

If so, the answer is not directly. B&O at one point offered upgrade kits, for example for the BC2300, and BC2500. It came with a new decoder board and CDM12 mech, new mounting hardware and front fascia.

So each mech requires its unique respective controller and decoder.

Without the kit, I suppose if you had a BC2300 radial version, and a BC2300 linear version you probably have enough parts to get swap from one to the other.

The BC9300 never came with a radial laser. Not sure if you can go backwards here.. the internals and layout are different from its predecessor, the 9500.

 

[auric]

Hi Guy:

Did the BC2300 linear version ever have problems playing CDRs even when new? My BC4000 was purchase used with a dead laser and so I have no reference to what it “should have been” like.

I ended up swapping the laser with a new one to get it working. As I mentioned it plays all pressed CDs fine, just very picky with CDRs which I’m not too crazy about but at least its working.

I did swap the surface mount capacitors on controller card mounted on the back of the mech first. It didn’t do anything. I ended up going through 2 different laser pickups. The first one I bought on ebay didn’t work. I think there are a few different versions and you need to find the right one. The second laser I bought from a local Juke Box repair company. That one they provided worked.

They also gave me a tested working controller board, the one that I replaced the capacitors on. That didn’t work with the BC4000. We suspect there maybe different firmware on there. Anyhow I went back to the original controller with the new laser and it plays.

Derek

 

 

[Guy]

auric wrote:

The BC9300 never came with a radial laser.

According to the Service Manual, early ones did. Hence the addendum to the Service Manual when the linear CD was introduced (from Serial 13289412)

See also this thread which discussed both types: https://archivedforum.beoworld.org/forums/t/12146.aspx

And here’s one in the flesh: https://www.youtube.com/watch?v=ZI0pcJs6W64&start=120

[Guy]

Madskp wrote:

Does anyone know if these drive mechanisms are interchangeable, or if other components and/or software versions are required for that to work?

The last post (by joeyboygolf) in the thread I linked to above suggests that the CD interface board would also need to be replaced. It wouldn’t surprise me if there was also a Beosystem/Beocenter software update required.

auric wrote:

So each mech requires its unique respective controller and decoder.

I assume ‘controller’ = ‘CD interface board’

[Madskp]

Hello both

I would expect bothe the mechanism and the decoder board to be replaced to. In case of Beocenter 2300 and Ouverture my thinking was to replace the whole unit that are held by the to springs.

The reason for thinking og this is beacuse og the issues with the linear alser, ut also because relativly often I am able to find a defective Ouverture/2300/2500 cheaper than a new laser from Beoparts shop.

[Guy]

radzio222 wrote:

@guy I found some service manual for beo9000, but its lacks service mode for CD. Have only for FM and Deck.

The service manual for BC9300 is available on Beoworld for paying Gold and Silver members – see here for details of membership status: https://www.beoworld.ouronlineserver.com/what.asp

The main BC9300 service manual on Beoworld gives details of the CD test mode operations. However, this manual is actually for the earlier CD mechanism with the radial (curved track) laser pickup. The site also holds a document describing the CD Pro laser mechanism (linear track) that is fitted to your later BC9300. There are no new test mode procedures listed, hence I think that test mode process in the earlier manual still applies.

This thread may be useful: https://archivedforum.beoworld.org/forums/t/35325.aspx?PageIndex=1

[Guy]

auric wrote:

Hi Guy: What is your experience with the Philips CDM12 linear pickups? I used to have Beocenter 2500 (Radial Pickup) and a Beocenter 4000 (Linear Pickup). I found that the radial pickups will play anything… pressed CDs as well as CDRs with no problems. The linear lasers seem to be more picky. My BC 4000 plays pressed CDs fine. It doesn’t do well on CDRs even after laser change. It seldom plays CDRs perfectly from beginning to end. Some CDRs are unreadable others will skip near the outer tracks. Derek

Hi Derek – similar experience for me: Both mine and Mother-in-Law’s BC9500s CDs have always played fine with all CDs, as has my early model radial laser BC2300. The linear tracking late model BC2300 that I took out of storage last week is the first CD that I have had major problems with, and I am about to dismantle and investigate further. Also both my BeoSound 1s initially had CD problems but are both now playing well after a light clean and running CD test modes to ‘exercise’ the laser pickup!

[auric]

When I refer to the controller, I mean the long vertical board along the right side of the BC2300 right behind the right black acrylic cover.

There are two components, the CD mech which has a circuit board attached to the back, and the interface (“controller”) a separate circuit board. CD mech plugs into the interface and the interface plugs into the rest of the BC2300.

[auric]

Thanks Guy.

So I stand corrected! I’ve never seen a 9300 here in the US with a radial mech. Looking into this further I found a photo in the archived section of the Beoworld:

https://archivedforum.beoworld.org/cfs-filesystemfile.ashx/__key/CommunityServer.Components.PostAttachments/00.00.16.60.51/99K-Done-_2D00_-Interior1.JPG

The CD interface board on the BC9300 is very different from the CD interface board of the BC9500.

So I wonder if the radial mechanism on the BC9300 is interchangeable with that of the BC9500. (The CDM4 lasers are interchangeable)

But I suspect the interface is a bit different on the full CD mechs?

 

 

 

 

[radzio222]

A little update on a case. I replaced capacitors to new THT, low ESR, 105C.
I cleaned and lubricated again laser runner.

The result is that I have some more CD’s that Beo is able to read. Huge improvement in reading later tracks of CDs.

Also more CDRs are working now, but… There are still some CD that are unreadable very quickly.

IMHO it’ s a feature not a bug 😉

Anyway. Thanks for all your help. I finally can write that my Beocenter 9300 is operating again !

[Guy]

radzio222 wrote:

Anyway. Thanks for all your help. I finally can write that my Beocenter 9300 is operating again !

Glad that it is now working!

Is that with the new (AliExpress) laser, or did you put the original one back in after replacing capacitors?

[radzio222]

This one from Ali, old one didn’t start any CD.

[Author]

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