Workshop CD5500 CD6500 CD7000 Reparatur Laser Controller Servo Platine

86 replies
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Check the ESR on all your capacitors.

These CD decks are built like a tank, and will last for (almost) ever, except for the lousy capacitors B&O used.

Regards

M Yachad

Location: Jerusalem

My B&O Icons:

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Electronics Technician in Jerusalem Israel. B&O fan for over 50 years.

Markus,

It sounds as if the player don't realize that a CD has been inserted.
Normal behavior if hitting play with no CD on the tray is tray retraction and then standby.
There are a couple of sensors (dust) and switches (dust and oxidation) that probably will need cleaning.
Capacitors can never be ruled out and neither can cracked solders. Every CD50
coming in here gets a check of the power supply areas (a.o.), voltage
regulators etc., and also certain areas of the servo board. There's almost always something to do in those areas.

Martin

Sorry to state the obvious, but don't forget the CD goes in upside-down on a CD50!

Andy T.

Hello,

thanks for your valuable advice. I've followed your instructons and changed the 33uf to a 47uf 35V. But still it does not working properly. The funny thing was, that it was reading CD-R but not normal Audio CDs. So I try to spin on the pots (yes, also the dangerous laser current,very carefully) but without any access.

For my luck, i had an old working philips cd350 here with CDM2/10 drive, CD5500 has CDM2/29 drive. After changig the Laser and adjusting the Pots my CD5500 works fine! The amazing thing is, it also plays CD-RWs now!!!! It's that crazy! I have never thought that this device can be repaired so easily.

Best Regards,

Misko

Hi Martin,

I have the same problems with a Beogram CD 3500. Not reading CD's some time's Inside the board seems the same as on the picture of the 5500. Is it the same? I adjusted the laser current to 45mV and it works again now. It was 65 mV.

I would like to order the caps somewhere in Europe. I am located in The Netherlands. If you could add the partnumbers for that webshop I would be very pleased.  These CAPnumbers I would like to replace:

 

2103= 33uf or better 47uf axial blue Philips

2159= 1,5uf bipolar, replace with 1,5uf WIMA MKS-2-5 (red on the picture... I can not locate this number on my PCB board)

2104/2107=47uf, replace with 100uf low esr type or high qualitiy power supply type

2138,2140=220uf, dito

 

Kind regards, Edwin

 

Edwin,

There are many different versions of the servo board.
If yours haven't got the bipolar cap, it will be a different version
and you will have to let us know the exact version number found on the boards
solder-side or, even better, a photo of the board back and/or front sides.

I don't have a webshop but I put together the cap kits.
I am not aware of anyone else providing kits like this.

Adjusting the laser current is not recommended. The adjustment doesn't go out.
In 95% of the cases or more it's the capacitors in the electronics that fail
and replacing them will restore normal operation as long as no adjustments were
set to match the defective electronics, so in your case I suggest you readjust
immediately after recap'ing and note that due to a typo, not all service manuals give
the correct point for measuring.
That goes especially for the Beocenter 9000, where almost all service manuals are wrong.

Martin

Hello Martin,

I have replaced all the caps as you've mentioned here and everything is working fine, even CD-R now.

But when I mount into the tracklist by pressing play on the front, I cann't always skip all the numbers until the last tracks!?

The player goes then in standby, what would be the cause of this??

The 3 or 2 last numbers of the disc are the most difficult to select, the others are no problem!

The strange thing is, when I let it play without selecting any track manualy, the whole disc is playing faultless!!?

Is there a difference between HR and TK capacitors? I've used 100µF/16V TK (Jamicon), 220µF/16V HR (Choyo), 1,5µF/63V bipolar (Wima) and 47µF/40V axial (Philips blue). Are the voltages also OK??

Regards, Bruno

 

Hallo Martin, ich bin auf deine Beschreibung hier im Forum gestoßen und wollte dich fragen, ob mein Problem mit dem Wechsel der Bauteilen zusammenhängt:

Ich habe einen Beogram CD 5500. Das Gerät spielt meistens saubere CDs ohne Kratzer ab, gelegentlich auch gebrannte. Bei gebrannten und CDs mit kleinen Kratzern steigt der Player häufig abruppt aus und schaltet ab. Beim Einlesen von schlechteren CDs braucht er lange oder schaltet auch ab.

Es wurden ja nun verschiedene Bauteile beschrieben, die man nehmen sollte oder welche die nicht, könntest Du mir welche nennen, die neben den Philips, die man scheinbar nicht mehr bekommt, ersatzweise verwenden kann? Ich bin kein gelernter Bastler, habe aber schon gelegentlich solche Bauteile getauscht, manchmal ohne zu wissen, was das Teil genau macht...

Ich wäre für Hilfe sehr dankbar...

Jürgen

Es ist eigentlich alles schon im ersten Teil des Workshops genannt worden. Bauteilnummern, Werte und auch Bilder.

Das einzige kleine Problem stellt der originale blaue Philips dar, der von BC Components ersetzt/aufgekauft wurde. Diese Kondensatoren sind jederzeit hier in Deutschland noch erhältlich, bei Reichelt, Segor und vielen anderen Lieferanten.

Mit den genannten Teilen ( nur 6 Kondensatoren...) lassen sich die meisten Controller soweit regenerieren, dass der häufigste Fehler erledigt wird. Mit etwa 5 Euro Material und einer Stunde Arbeit kann man mit etwas Löterfahrung ihn zu 80% wieder hinbekommen.

Alles andere wie Risse, kalte Lötstellen oder auch wirklich verbrauchte Laser läßt sich damit natürlich nicht kurieren, das braucht dann wirklich einen erfahrenen Elektroniker. Man kann nicht alles in so einem Artikel erschlagen.

Der blaue Philips ist sogar noch hier bei Segor ganz normal lieferbar, 40 Cent.

Hallo Martin,

wie du merkst bin ich elektronisch höchstens ein Laie, daher zur Sicherheit noch die Frage wegen der Volt-Werte.

Soweit ich es erkennen konnte:

 

2103= 33uf or better 47uf axial blue Philips, 16V

2159= 1,5uf bipolar, replace with 1,5uf WIMA MKS-2-5 (red on the picture... I can not locate this number on my PCB board), 50V

2104/2107=47uf, replace with 100uf low esr type or high qualitiy power supply type, 25V

2138,2140=220uf, dito, 16V

 

Ist das so korrekt???

...
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