The Workbench

Re: Beocenter 7000 just says "P"

yachadm — Mon, 27 Sep 2010 14:52:17 GMT

Bazooka,

I don't want to deflate your balloon of success on this, but understand that these modules are pretty reliable and don't fail willy nilly.

You need to check the passive components around the CPU, especially the capacitors, and replace the faulty ones, else the new CPU will fail again fairly soon.

Martin (Dillen) has capacitor kits, which I would recommend you install, especially since you're handy with your tools.

Menahem

Re: Beocenter 7000 just says "P"

Dillen — Thu, 16 Sep 2010 10:25:24 GMT

Sounds like it stopped mid-cycle for some reason.
What happens if you push the tonearm towards the record center (over the lead-out groove)?

Martin

Re: Beocenter 7000 just says "P"

Bazookatooth — Thu, 16 Sep 2010 09:28:38 GMT

yes, there is a record on the platter.

Also, the tone arm is stuck halfway over the record. It's not low enough to touch it, it's just stuco over it.

When i move it back to it's resting position, it moves itself back out over the record. Not by motor, but by tension.

Re: Beocenter 7000 just says "P"

Dillen — Thu, 16 Sep 2010 00:32:42 GMT

Thanks for letting us know the results.

Sorry to ask this, but have you tried with a record on the platter ?
The deck will not start without a record.
Are the transport safety screws released ?

Martin

Re: Beocenter 7000 just says "P"

Bazookatooth — Wed, 15 Sep 2010 17:20:15 GMT

i just wante to follow up. I ordered a control module and replaced it. The unit turns on now and switches between sources.

The only problem i have now is the tuntable seems to be stuck. I can hear the relay firing when i press the PH button, but the turntable does nothing.

Re: Beocenter 7000 just says "P"

Dillen — Mon, 28 Jun 2010 15:46:23 GMT

The control module is specific to the Beocenter 7000.
One from a Beocenter 7002 might work too. I don't remember if the added functions
of the 7002 influenced on the processor board.
The 7007 and 7700 are all different.

Martin

Re: Beocenter 7000 just says "P"

Bazookatooth — Mon, 28 Jun 2010 11:51:03 GMT

by the way, which models can be used as donors? Is the control module for the 7000 specific to that model, or can i use another Beocenter's control module?

Re: Beocenter 7000 just says "P"

Bazookatooth — Mon, 28 Jun 2010 09:11:50 GMT

well i guess i'm going to start digging into the system tonight. Thanks for the advice.

Re: Beocenter 7000 just says "P"

Dillen — Mon, 28 Jun 2010 01:30:00 GMT

Welcome to Beoworld !

This is actually one of the better combined systems.

It doesn't have a protection circuit that can act this way.
The problem with yours is most likely that the CPU reset circuit is faulty.
Could be as simple as a capacitor, a diode or a transistor. That'll be C34, D6 and TR14
on the processor module behind the displays.
Rarer is a faulty processor but it does happen in which case you will have to find a
processor (or complete module) from a donor machine.
Worth doing.

Martin

Beocenter 7000 just says "P"

Bazookatooth — Sun, 27 Jun 2010 19:25:18 GMT

Hey everyone,

I'm new here, but not so new to B&O. I grew up listening to a beocenter and i currently have a Beogram 1700 TT.

This weekend i picked up a Beocenter 7000 from a guy in town for a very very low price. I was really interested in the cabinet, and figured if i could get the system working it would be an added bonus. It came with the original recipts and all the service records. It even has the electrical diagrams (i assume the service manual).

As it stands the display just says "P" on the right side. None of the buttons work and the turntable does not spin. I assume it is locked up or in some sort of a protection mode.

I'm pretty adept at fixing things. I have a few pioneer receivers i have recapped and repaird (late 70's SX models). So i have no probelm taking it apart and going through it if that is what's needed. I just wanted to check here to see if anyone had any insight into the "P" on the display.

Thanks for your help!