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Beocord 7000 play problems after belt change...

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MrRoast
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MrRoast posted on Tue, Sep 15 2015 5:10 PM

Hello all - in need of some help if anyone can be of assistance!

I bought a supposedly 'working' Beocord 7000 a few weeks back and it arrived powering up but not playing - the playhead was stuck in the cassette. I got a new set of belts from Dillen and have just got round to following Weebyx's excellent guide to replacing them.

However, with the new belts in place it's still not playing. In addition I'm getting some odd symptoms now it's all back together again Huh? 

If I put a cassette in and press PLAY on the control panel - nothing happens, however if I press PLAY on my Beolink 7000 (or the PLAY button on the front of the Beocord) the playhead engages, tries to play side one then turns to play side two then stops.

<< / >> on the control panel behaves like the PLAY button - nothing happens but it works via the Beolink. Likewise the TURN button on the panel does nothing but on the remote it works. BUT if I press AUTO REC or DOLBY on the control panel they work. Hmmm - can only half the control panel work?

I've taken a short video here so you can see what I'm on about (NB the Beolink is working one-way at the moment until it has it's caps replaced).

Hopefully someone can shed some light for me!?

 

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Dillen
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Dillen replied on Tue, Sep 15 2015 5:30 PM

Sounds like two separate faults:

Check the mounting of the flat belt. If not precisely centered it will creep up or down and block the mech.

Check the cable to the front panel. Look for breaks or other damages and/or bent pins in the connector.

Martin

MrRoast
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@Dillen - thanks Martin Yes - thumbs up, makes sense that it could be two separate issues but just my luck they happen at the same time Big Smile

Stupid question but if the belt is misaligned and affecting the mechanism wouldn't that stop the FF/RW working (which seems fine)?

I'll strip the deck down again and have a look around and let you know how I get on!
Weebyx
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Weebyx replied on Tue, Sep 15 2015 6:20 PM

That looks strange...

Try pressing play without a tape in the unit. The 2 silver axels should start spinning (the left clockwise, the right anti-clockwise) If they are spinning, then the new belt is sitting correct, hovewer, since the unit can FFWD and RWD, I would say that the problem is not the belt.

When you replaced the belt, did you unsolder the PCB ? If so, check the 2 magnetic activators that is solderd on the PCB. They could be stuck somehow ? Also check the detectors for the tape on the PCB, the obes that detects if there is a tape inserted and so on. Those plastic activators can also break, or sit wrong.

Is the sensor PCB for the counter (the one the smallest rubberband activates) correctly installed ? 

You will have to open the unit up again, and take a really good look at the unit. Since the tapeheads activates, I would think that at least one activator is working. The whole unit is controlled by a set of gears that again is controlled by the 2 activators. You can manually try to turn the big wheels when you have the unit out, then you can press on the plastic parts the activaters should, and you will see if the tape head engages.

Also, when pressing the tapeheads up manually, there should be a white flat piece of plastic that is pushed upwards. This controls the gears for the axels that runs the tape.. The tapeheads is pushing on a small tap of plastic, this could have broken off ?

But as Dillen is suggesting, check the control panel connector first, try to see if there are any breaks or so ?

It is strange that some of the functions works from the remote, but who knows how the software acts if some sensors are giving mixed signals..

There is only the hard way, open up the unit and remove the plastic, and take a look at how the unit performs mechanically.. Also check the big belt again, check if it is running centered on the wheels..

/Weebyx

MrRoast
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MrRoast replied on Wed, Sep 16 2015 10:25 AM

Thanks for the reply Weebyx Yes - thumbs up - it's frustrating when something just doesn't work!

I've stripped the deck down and can move forward by eliminating some things: 

Firstly I reseated the control panel connecter and all the buttons work again (schoolboy error Stick out tongue )

Try pressing play without a tape in the unit. The 2 silver axels should start spinning (the left clockwise, the right anti-clockwise) If they are spinning, then the new belt is sitting correct, hovewer, since the unit can FFWD and RWD, I would say that the problem is not the belt.

– Both axles spinning and FF RWD working so not the belt it would seem

When you replaced the belt, did you unsolder the PCB ? If so, check the 2 magnetic activators that is solderd on the PCB. They could be stuck somehow ? Also check the detectors for the tape on the PCB, the obes that detects if there is a tape inserted and so on. Those plastic activators can also break, or sit wrong.

– Yes, I did unsolder the PCB to replace the belt but as my soldering isn't the best I checked the continuity of the solder joint with a multimeter and this is fine. The magnetic actuators appear ok, they don't seem to be stuck/impeded. The tape detectors were all fine except one (see pic) but I corrected the seating and put everything back together but still no joy Erm..

(bigger version here)

Is the sensor PCB for the counter (the one the smallest rubberband activates) correctly installed ? 

– I think so, the sensor is aligned with the magnetic wheel, and I made sure to pay attention to the one on the larger PCB when I resoldered it .

You will have to open the unit up again, and take a really good look at the unit. Since the tapeheads activates, I would think that at least one activator is working. The whole unit is controlled by a set of gears that again is controlled by the 2 activators. You can manually try to turn the big wheels when you have the unit out, then you can press on the plastic parts the activaters should, and you will see if the tape head engages.

Also, when pressing the tapeheads up manually, there should be a white flat piece of plastic that is pushed upwards. This controls the gears for the axels that runs the tape.. The tapeheads is pushing on a small tap of plastic, this could have broken off ?

– OK nothing seems 'broken' as far as I can see with regards to the plastic gears but I've taken a couple of photos - can you see anything that looks amiss?

(bigger version here)

(bigger version here)

Hmmmm - what could the problem be?!

Weebyx
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Weebyx replied on Thu, Sep 17 2015 10:34 AM

Hmm, it looks fine on the pictures...

 

When you engange the tapehead manually, does the metal part just above the right spring, engange the white plastic tip ? And does the 2 plastic parts above the black wheels, move upwards and "unlocks" the 2 black wheels so they move freely ?

In my experience with the 3 BC7000's I have fixed, the flat metal part, dpes not engage the white plastic tip 100%, and the the black wheels are not completelly free to rotate.. I usually fix it by quick glue'ing some of that black shrink'y thingy that is used to isolate wires after soldering, on the white tip, and the heat it up so it will be a bit thicker.. Then the white plastic arms moves 100% away from the black wheels.

Other than that, nothing seems wrong to me in the pictures... 

 

/Weebyx

MrRoast
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MrRoast replied on Thu, Sep 17 2015 12:23 PM

OK - so after a late night fiddling around with the mechanism I gave up and put everything back together again this morning.

And it worked Big SmileHuh?

Not sure exactly what I did but at first it didn't play - then just made a clicking sound and started playing. The TURN wasn't working but then started again, now all seems fine! I've given it a good workout to make sure everything is ok.

Maybe badly seated connectors? Maybe just a mechanism that had been sitting unused for a while? Maybe a knock in shipping had unseated something? Who knows but I'm glad it's now behaving itself!

Thanks @Dillen & @Weebyx for the suggestions - very helpful and no doubt solved a lot of the issues there were!

Weebyx
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Weebyx replied on Thu, Sep 17 2015 12:54 PM

Great, sometimes things just needs re-assembling ;)

 

/Weebyx

Filip
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Filip replied on Mon, Jun 22 2020 3:28 PM

Regarding the white plastic part that you put a bit of heat shrink on - is it the parts that I circled in red?

I recently changed the belts (Thanks, Dillen/Martin for the belts) in my Beocord 7000 and while everything is running great, I do have a ticking sound from the left wheel when I am playing in reverse. Also it seems to have sort of a wobbly/distorting sound. Not beolovely. Any help is appreciated.

Filip
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Filip replied on Tue, Jun 23 2020 7:26 PM

Ok - so I took it apart and discovered the right point at the top right white part where there is a little plastic knob/pin. I covered it with a bit of wire plastic, and the deck now sounds as it should without any wobbling. Yay.

However, of course whenever you take old plastic parts apart something always breaks even when you are very carefull, thus the plastic cover broke where two of the screws were supposed to go :-(

So, I wonder if anyone has the plastic cover that covers the tape deck that they'd be willing to sell?

Filip
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Filip replied on Tue, Jun 23 2020 7:26 PM

Ok - so I took it apart and discovered the right point at the top right white part where there is a little plastic knob/pin. I covered it with a bit of wire plastic, and the deck now sounds as it should without any wobbling. Yay.

However, of course whenever you take old plastic parts apart something always breaks even when you are very carefull, thus the plastic cover broke where two of the screws were supposed to go :-(

So, I wonder if anyone has the plastic cover that covers the tape deck that they'd be willing to sell?

Filip
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Filip replied on Tue, Jun 23 2020 7:26 PM

Ok - so I took it apart and discovered the right point at the top right white part where there is a little plastic knob/pin. I covered it with a bit of wire plastic, and the deck now sounds as it should without any wobbling. Yay.

However, of course whenever you take old plastic parts apart something always breaks even when you are very carefull, thus the plastic cover broke where two of the screws were supposed to go :-(

So, I wonder if anyone has the plastic cover that covers the tape deck that they'd be willing to sell?

Filip
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Filip replied on Tue, Jun 23 2020 7:26 PM

Ok - so I took it apart and discovered the right point at the top right white part where there is a little plastic knob/pin. I covered it with a bit of wire plastic, and the deck now sounds as it should without any wobbling. Yay.

However, of course whenever you take old plastic parts apart something always breaks even when you are very carefull, thus the plastic cover broke where two of the screws were supposed to go :-(

So, I wonder if anyone has the plastic cover that covers the tape deck that they'd be willing to sell?

Dillen
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Dillen replied on Wed, Jun 24 2020 6:42 AM

The static discharge for the left capstan bearing is not in a correct position in that photo.
The right one is.

Martin

Filip
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Filip replied on Wed, Jun 24 2020 2:28 PM

Sorry, I re-used the pictures in this thread.

For reference, here is where I put the small wire insulator.

The sound is great. However, after some time, I heard an awful screeching sound, and it comes and goes, and it is definitely coming from the motor - at a point it actually shut itself off. I wonder if the motor can be lubricated by just adding a very small drop of oil on the pin, or if it is the kind where you need to take out the bearings and put them under a vacuum to infuse oil? Anybody knows?

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