The Workbench

Re: Beomaster 8000 finally on the bench!

chartz — Wed, 24 Aug 2011 06:44:22 GMT

Step1:

Thanks Jacques, how much would you want for it? let me know...

You're kidding!

Just PM your address my friend. By the way, do you want the SP14 back?

Re: Beomaster 8000 finally on the bench!

Step1 — Wed, 24 Aug 2011 06:37:35 GMT

Thanks Jacques, how much would you want for it? let me know...

Re: Beomaster 8000 finally on the bench!

chartz — Sat, 20 Aug 2011 17:38:19 GMT

Olly,

I've got a better-looking-than-yours pinch roller if you want! Not new, but relatively flat and grippy.

Or there: http://cgi.ebay.fr/Bang-Olufsen-2804041-cassette-deck-pinch-roller-rare-/150219226601?pt=Vintage_Electronics_R2&hash=item22f9c37de9#ht_500wt_918

Re: Beomaster 8000 finally on the bench!

Step1 — Sun, 01 May 2011 08:28:37 GMT

Eugene I am sure they are all mostly identical but for a few small changes here and there... I am pretty sure the Beocord 5000 and Beocenter 4000 (the good one!) had the same mechs, different to these!

Re: Beomaster 8000 finally on the bench!

Eugene — Sat, 30 Apr 2011 11:56:04 GMT

The cassette mechanism looks eerily similar to the ones used in the Beocenter 7000 and 7700. I am still finding belt goop in and around my work area - months later.

Re: Beomaster 8000 finally on the bench!

Step1 — Sat, 30 Apr 2011 09:54:27 GMT

Seems you were quite correct Martin, Couldn't find any dry joints or obvious breaks to the tracks but as you had suggested with the 8000 the header pins were not in the best of conductive states! I have replaced the headers with some gold plated jobbies, and allowed solder to run over a slightly larger track area by removing some of the laquer. Will do the same to the playback header then I might replaced the sprung terminals inside the sockets. I will polish the other headers not connected with audio and visually check once done.

So far, I am pleased to announce everything seems to be working correctly! The level sliders need stripping as with the 8000, at the moment there are places where it is not always easy to set recording level accurately! Also you can hear the scraping noise.. Looks like I might have to invest in some serious test tapes to get the best out of this machine though! Not sure what to do about that just yet. Any pointers folks?

Recording very good as expected but have not conducted any serious listening tests!

I think I will order caps for this along with the 8000. Seems I have a different Dolby board which is not featured in this sites copy of the manual, and there are component lists missing etc.. Had to go through every board manually to double check values etc!

If anyone has complete original service manuals they would like me to scan for this site, that could better what is already available please let me know so we can make the collection more complete!

Re: Beomaster 8000 finally on the bench!

Dillen — Fri, 29 Apr 2011 08:08:05 GMT

Step1:

might need your guidence yet Martin but would like to work things out for myself!

Fine Olly, I'll just sit around.

Martin

Re: Beomaster 8000 finally on the bench!

Step1 — Fri, 29 Apr 2011 04:56:18 GMT

Yes there is a relay Geoff that grounds the heads this appears to move just fine but I need to test this properly!

Re: Beomaster 8000 finally on the bench!

Step1 — Fri, 29 Apr 2011 04:54:39 GMT

Martin of course I meant the pinch roller No the capston is fine! It has been a looooong time since I did any work on a cassette deck!

I probed around a bit last night and I am spending time actually working out how things work, for the large picture, then I can go into a bit more detail when I have got my head round what is or isn't happening. Quite a complicated beast isn't it I might need your guidence yet Martin but would like to work things out for myself!

Re: Beomaster 8000 finally on the bench!

Dillen — Fri, 29 Apr 2011 02:30:30 GMT

Check plugs and connectors everywhere.
In some Beocord's plugs can go on offset a pin or two unnoticed.
Check also the solder joints at the connectors.

A replacement capstan (flywheel), why ?
I take it that if it was bent, you wouldn't have enjoyed listening to it for an hour.

Martin

Re: Beomaster 8000 finally on the bench!

geearr — Thu, 28 Apr 2011 21:19:16 GMT

Olly

Just a quick thought

I have never had a single problem with the record circuits on these machines (9000 and 8002) so I will be interested to know what was wrong with yours. Since both channels are being affected in exactly the same way, it should be something very basic. I seem to remember that there was a relay in the record circuit and if so, that might be stuck!!

Regards

Geoff

Re: Beomaster 8000 finally on the bench!

geearr — Thu, 28 Apr 2011 20:57:17 GMT

Nice clean up job on the tape deck Olly. Why do you need a new capstan? I assume that you are referring to the flywheel assembly.

Regards

Geoff

Re: Beomaster 8000 finally on the bench!

Step1 — Thu, 28 Apr 2011 04:10:06 GMT

I pulled my 9000 apart last night, the deck was as you would expect, not used for a long time and a little tired looking, was lots of the gooey stuff!

The goo...

So I stripped the mech and started cleaning everything up, including my fingers!

Some more cleanup pics here...

Takeup tensioners

...After

rubber parts like brakes etc.. cleaned up ok and were still supple.

New belts go on..

And the tape path is cleaned up..

Would like to find a new donar for the capston so if anyone has any ideas. There must be a suitable replacement out there somewhere!

I might do some more work on it yet but everything works fine.

Oh I need to sort out cracks in the clutch shaft but they are not as bad as the examples seen in Geoff's thread so they can wait for a while!

So I put everything back together and switched the unit on. And wow, I am blown away by the playback quality of this deck! Absolutely amazing for something so old :) So much so I spent the next hour with my headphones on listening to some old-school tunes :)

It then occured to me to try the very thing that excited and intrigued me about this deck - the calibration and recording features!!!

This is were the news isn't so good. I connected to the BM6000, comms fine, got a good strong signal from the radio and tried recording. When I played back the tape, it appeared nothing had happened! In fact the original material remained unchanged! Damn.

Tried calibration. Seemed to go through the actions, and at least this time on playback I heard a few noises and a tone, but this was on top of the original music so it is clear there is a problem related to both recording of signals and the erase circuit.

That is where I am atm. Will investigate further tonight.

BTW anyone experience with digi-key customer service? I sent an exmail to enquire about postage for a number of caps and there has thus far been no reply I hate it when this sort of thing happens, doesn't exactly fill me with confidence! I will have to try again I suppose.

Re: Beomaster 8000 finally on the bench!

geearr — Tue, 26 Apr 2011 18:20:28 GMT

I agree that most of the modern caps are much smaller, but the ones that I was looking at were shorter and fatter. I will still be very interested to see what type of cans you finally install and how well they can be tailored to the limited space. It would be even better if they didn't break the bank at the same time!!!!

Regards

Geoff

Re: Beomaster 8000 finally on the bench!

Step1 — Tue, 26 Apr 2011 04:37:35 GMT

Hi Geoff, thanks for the interest. TBH I have found just the opposite! Most modern equivalents are actually quite a bit smaller! I will be choosing at least 80V electros for the main amp PSU. Still not ordered anything yet but want to be sure I have covered quite a few items I have to work through and also waiting for an email off a supplier atm!

I am looking at Panasonics for most of the PSU caps / decoupling etc, some the larger of which I will source from Digikey I think, more choice and quite a saving over our providers in the UK! Signal path caps looks like I am using Nichicon (thanks Eugene for good source) although I am ording some Vishay 515's to try out in my 6000, as I would like to find something with similar specs to the original capacitors.

On a side note I will hopefully update this thread with some Beocord 9000 photos later on..

sorry about the text not sure what I have done here! what is default font on these forums?