The Workbench

Re: Ouverture with faulty doors and CD mechanism.

matapan — Sun, 04 Oct 2009 11:21:39 GMT

It's a bulb. Don't know the wattage, but I found something similar at the local electronics component shop in the US for about USD $2. I bought bulbs of different wattages to try out until I found the one which provided a comparable brightness. The other way to go is to just buy the assembly with the bulb, available from B&O as a service part, I think.

Re: Ouverture with faulty doors and CD mechanism.

auric — Thu, 01 Oct 2009 16:58:47 GMT

Hi Ola:

Might I also suggest that you take a look at the array of fuses in the unit to make sure that they are all of the correct value.

Sometimes people put high current substitutes in them or bridge them with a piece of wire!

The fuses on this unit are pretty sensitve and they blow quickly to protect the electronics.

It strikes me as odd that your PCB would/could produce that much heat without first blowing the a fuse. Best to make sure so that future faults are not catastrophic.

Derek

Re: Ouverture with faulty doors and CD mechanism.

tournedos — Thu, 01 Oct 2009 15:26:28 GMT

Great you got it working! That's not a bad price for a module of that complexity, I'd probably gone that route myself.

The schematic shows regular bulbs in there, four in parallel. So if only one is out, it has probably burned or has a bad contact. I have to admit I've never even seen an Ouverture in the flesh, so I can't advice you on how hard it is to get to them Didn't see the specs of the bulbs anywhere in the service manual either, so they might be part of a module... but I bet you can replace just one bulb if you want to.

Re: Ouverture with faulty doors and CD mechanism.

B&Ola — Thu, 01 Oct 2009 15:07:40 GMT

Thanks for your answer!

I found it to hard to repair so I just bought a new PCB for 50 €.

Now I found that one of the lights, that lit the CD from the side, doesn't work.

Any clue about this? Is it a bulb or is it a LED?

/Ola

Re: Ouverture with faulty doors and CD mechanism.

tournedos — Wed, 16 Sep 2009 02:45:01 GMT

Of course you can replace just the parts, but it might not be the only problem.

To me, it seems TR14 on the opposite side of the PCB at upper right has been so hot that the solderings have opened. It's part of the power supply to IC2, the door motor driver which has been quite hot as well. I guess this might happen if the doors get stuck - but isn't there a belt that probably should slip in that case? Maybe the motor itself has seized (should be easy to disconnect it and try to run it with a battery).

The clamper motor seems to run from the same power suppy, so if it's dead also the problem is (at least) in the power supply.

The IC (L2722) should be readily available and cost 2-3 euros, BD438 likewise, only cheaper... I'd replace them both and redo the solderings after checking the motor and mechanism as to why these parts failed.

Edit: it's of course L2722 (dual power op-amp), LM2722 is a completely different animal...

Ouverture with faulty doors and CD mechanism.

B&Ola — Tue, 15 Sep 2009 17:07:20 GMT

Hi!

I have a Ouverture that I just bought where the doors and CD mechanism doesn't work.
When waving in front of it the lights goes on but doors are not moving at all. You can't hear the engine either.

When I opened it I found found something that didn't look right. Do I have to replace the whole PCB or is it possible to just replace the faulty components? Seems to be a transistor (TR14) and a IC (IC2).

Please have a look at the picture!

Best regards Ola