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Beocenter 2300 CD issues.

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BO
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BO posted on Thu, Jan 10 2013 10:37 PM

I know this has been discussed in other threads but i don't really recognize the symptoms as described by others.

I bought this unit for a reasonable price on an auction. I was informed that it had been dropped on the floor and no function guarantee was given. Anyhow i thought I'd give it a try. After receiving the unit I could see some external damage. One door was damaged and also the plastic case at a bottom corner. Tested the unit to find that doors where functioning but where not opening or closing fully. Radio was functioning flawless but the CD did't react. Removed the doors and back cover, doing that I found the most of the screws where missing. Open i found among other things the CD servo PCB loose and with the ribbon cables disconnected. 

Reattached cables and reassembled CD unit. Now when testing the CD it spins for 1 second then stops. Don't read CD at all. 

Putting the unit in test mode it looks as the laser is working, focus motor is working. laser motor working but when trying to start CD motor nothing happens.

CD unit is the newer CDM12 from 1999. 

What is the most likely fault? The SMD caps on the servo board? If yes, all of them or any special one?.

 

Damaged door

 

Removing doors

 

Straighten snap in bracket

 

Corner damaged

 

PCB inside damaged and "repaired"

 

Servo board was unmounted, completely loose

 

Ribbon cables unattached

 

Bad caps?  

 

Reassembled for test

 

//Bo.
A long list...

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BO
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BO replied on Sun, Jan 13 2013 3:14 PM

Leslie:

Ordered a few lasers CDM12 last week. Think I'm gonna place a thread how to replace them if anyone is interested!

@Leslie,

I'm very much interested.Smile

Where did you order them from? Please post photos when available.

//Bo.
A long list...

Leslie
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Leslie replied on Sun, Jan 13 2013 4:32 PM

Please wait, still waiting for them. As soon as I have them I will do the exchange and will post pictures!

Brengen & Ophalen

Bobby
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Bobby replied on Wed, Jul 17 2013 11:09 AM

My 2300 CD spins 2 or 3 seconds and then stopped, can't read any CD, could it be fixed with your laser module? 

Beocom 6000, Beocom 1, Beocom 5, Beolab 4000, Beocenter 2300, Beo4, Earset 2, Earset 3i

BO
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BO replied on Thu, Jul 18 2013 11:09 AM

The Beocenter 2300 came with different CD mechanisms over the years.

Early models came with CDM 4 which have a very reliable laser. In this case it's most likely a capacitor problem (well described in other threads)

Later models came with CDM12 industrial and later CDpro. In these cases the laser is most likely the problems. Lasers can be bought on e-bay but you have to find out which CD mechanism you have.

//Bo.
A long list...

RaMaBo
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near Munich
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RaMaBo replied on Thu, Jul 18 2013 5:26 PM

Hi,

 

the CDM-4 Unit moves the laser in an arc whereas the later units move linear.

The CDM-4 very often suffers from the 'C2103' problem. In the Beocenter 2300 / 2500 it's the C100 on the 'CD SERVO Motor System AND DISC DETECTOR' Board  97. The Capacitor is a 47µF connected between Pin 17 of TDA 8808T and Ground (Focus Servo).

 

 

Ralph-Marcus

Peiseh
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Peiseh replied on Wed, Dec 25 2013 1:34 AM

Hi Leslie,

 

it would be great if you could share your experience on the CDM12 change. I too experience a CD down issue with my B2300.

cheers.

 

Leslie
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Leslie replied on Wed, Dec 25 2013 2:11 PM

Could take a while, finished all my BC2300's. I'm waiting for the next one :-).

Where you from? Maybe I could have a look at it if you live in Holland?

Brengen & Ophalen

Peiseh
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Peiseh replied on Thu, Dec 26 2013 4:06 PM

Hi Leslie,

Thanks for the reply. I am from Malaysia. I plan to DIY the CDM. Bought the optical pick-up from Liberty USA.

I hopeful to learn some tips from you and fellow Beos here about my BO2300.

thanks.

Peiseh
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Peiseh replied on Thu, Dec 26 2013 4:06 PM

Hi Leslie,

Thanks for the reply. I am from Malaysia. I plan to DIY the CDM. Bought the optical pick-up from Liberty USA.

I hopeful to learn some tips from you and fellow Beos here about my BO2300.

thanks.

Peiseh
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Peiseh replied on Thu, Dec 26 2013 4:06 PM

Hi Leslie,

Thanks for the reply. I am from Malaysia. I plan to DIY the CDM. Bought the optical pick-up from Liberty USA.

I hopeful to learn some tips from you and fellow Beos here about my BO2300.

thanks.

Leslie
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Leslie replied on Thu, Dec 26 2013 4:59 PM

Malaysia? Been in Port Dickson for my employer. Beautifull country...

Anyway, take the necessary ESD precautions. Lasers are highly sensitive for electrostatics. Before you know it will blow :-)

Brengen & Ophalen

Peiseh
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Peiseh replied on Mon, Dec 30 2013 1:01 PM

Hi ... great.. I am about a couple of hours away from PD. Good to know the place gives you some good memories ( i hope).

As for the Beo, I audiotech advised me against it. Anyway, will wait for the item to arrive and let the expert do it.

Anyway, I wil continue to scour the internets for info. 

 

Leslie
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Leslie replied on Mon, Dec 30 2013 3:03 PM

Maybe this could help just to give you an idea how laser replacement works?

Brengen & Ophalen

Peiseh
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Peiseh replied on Sun, Aug 17 2014 5:11 AM

hi thanks for the tip on changing the optical len. However, it appears that my unit' s fault is not that straight forward anymore (according to my independent hifi technician). The control board is faulty? 

Well, looks like its to the B&O service and repair centre then.

 

Chaka
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Chaka replied on Sun, Aug 17 2014 3:57 PM

In 96.75% of the cases I have encountered when CD's stop to spin or will not read (in linear tracking lasers - the later models - mid nineties onwards, it is ALWAYS seems the laser diode).  I have swapped many.  it is an easy job once you have done it a couple of times.  The earlier lasers in earlier equipment (that move in an arc rarely fail) it's generally something on the board!!  My BC9500 had spindle failure.  There are clips on youtube about disassembly of an upright beosound, you just have to work out how to change the laser diode yourself, once the CD mech is out.  Not too hard, with some patience.

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