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Beolink 7000 back light and recapping.

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BO
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Halmstad, Sweden
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BO posted on Thu, Nov 22 2012 9:05 PM

I received a package with some components from Conrad.

 


My Beolink 7000 with very weak back-light.



Assistant

 

1. Remove the two screws

 

2. Remove the cap.

 

3. Remove the last two screws.

 

4. Remove glass panel, don´t touch the inside. Be aware that the small four corner nuts don´t fall out.

 

5. Test the voltage. Should be around 130V

 

6. Disconnect display pcb from the other units. Be gentle with the ribbon cables. 

 

New electrolumiscent film.

 

Testing

 

7. Slide fixing rails to the left and remove them to release the LCD front frame. 

 

8. Remove front frame

 

9. Unsolder old film.

 

10. Unfold LCD display. Try not to touch the surfaces, especially the inside. Be very careful with the "rubber" profiles still on the glass. Those are the actual leads from the PCB to the LCD, if the will be miss positioned or contaminated with dirt dust or grease you will get an improper or faulty readout from the display.

 

11. Remove the luminescent foil. It's attache with two stripes of double sided tape on the backside.

 

Old and new.

 

12. Mark the size. Assure that you get the lead in the same position.

 

13. Cut it to correct size.
 

 

Ready for assembling.

 

14. Mount the new foil in position with two stripes of double sided tape on the back side. put the leads through the holes in the PBB.

 

15. Solder and reassemble in opposite order as the disassembling.

 

16. Testing....I do believe it's working...good...
 

 

17. Adjust the LCD contrast.
 

 

Potentiometer for contrast adjustment of the LCD.

 

18. And now the recapping, unsolder and remove tin housing. The five now visible capacitors should be replaces. The two violet ones to the left, the two smd´s in the middle and the green one to the right. This has been described in other threads  so I won't go deep into it.
 

 

19 Prepare the new components.

 

 

20. Soldered in place.
 

 

21. All components changed. Be careful with the small smd´s, the can be tricky to solder due to its small size. I also changed all other electrolytic capacitors. Not necessary now but just precaution.
 

 

22. Reassembled and working perfect again.Smile
 

 

 

//Bo.
A long list...

All Replies

Filip
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Copenhagen, *Denmark
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Filip replied on Tue, Jul 14 2020 6:18 PM

So my components have arrived and I have changed them apart from the SMDs which I had ordered in the wrong size - yep, instead of 6.3V I had ordered 63V and of course they are way too big to fit. Anyway, the capacitors that I have changed actually all measure fine off the board. I tried the Beolink 7000 and of course the changing of the okay capacitors made no difference. So, it looks like one of the SMDs is faulty. I have ordered two new ones in the right voltage and hopefully size.

John
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John replied on Mon, Aug 24 2020 10:53 PM

Time to find a new source.  Does anyone have any ideas?  I just got this response from Conrad.  

------------------

Dear John,

thank you very much for your interest in our products.

Much to our regret we have to inform you that the item requested is sold out and can no longer be delivered. Due to an error the item appeared in our web shop without any price or status information.

Unfortunately we only have red, green and blue display illumination films available anymore, as this product group is being phased out.
https://www.conrad.com/p/tru-components-thin-film-el-panels-blue-l-x-w-x-h-138-x-34-x-0.5-mm-1565919
https://www.conrad.com/p/thin-film-el-panels-red-l-x-w-x-h-112-x-87-x-0.5-mm-184043
https://www.conrad.com/p/tru-components-thin-film-el-panels-green-l-x-w-x-h-138-x-34-x-0.5-mm-1565920

We are terribly sorry to have to disappoint you this time.

In case of any further questions, please do not hesitate to contact us again.

Thank you very much for your understanding.

John
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John replied on Wed, Aug 26 2020 9:26 PM

Anyone have any thoughts to trying the red or green panel?  Blue will not work since the rest is blue and it would just be washed out.  

 

Filip
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Filip replied on Thu, Sep 17 2020 11:10 AM

Finally my SMD components arrived, and I have cleaned the board and soldered them on, and 2-way communication still does not work - argh.

Fast forward to this morning where 2-way communication suddenly started working - however only for a few minutes. I have then noticed that if I turn off the BL 7000 for a while, 2-way communication will work again but only for a very short time. Any suggestions what to look for?

BeoMedia
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Hi Filip,

When I recapped mine it didn’t work either at first.

Then I soldered off the several-legged chip nearby as it looked like one of the caps had leaked in under it.

When I had it off it revealed I was correct so I cleaned it and soldered it back on and it all worked.

Regards BeoMedia
Filip
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Filip replied on Fri, Sep 18 2020 2:40 PM

Thanks for the tip. Indeed there was still a bit of goo on two of the legs. I didn't unsolder the chip but used a q-tip with isopropyl alcohol and after removing and adding the components of the system, everything, including RDS started working. Yay. Can you believe I only paid 25 pounds for it?

Filip
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Filip replied on Fri, Sep 18 2020 2:51 PM

The only issue now is that the BL has a buzzing sound. Seems to come from near the battery compartment.

lausvi
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Helsinki - Finland
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lausvi replied on Fri, Sep 18 2020 3:31 PM

Good job, and a very nice price for a BL7000 Yes - thumbs up

If the buzzing is faint and only heard when the display is on, I'd say that was normal (due to the backlight high voltage coil resonating) and mine does that too.

BeoMedia
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Mine is also buzzing. It is normal.

I would recommend you to replace the button battery cell I side the remote as it has very likely started to leak (unless already replaced). If it leaks too much it will destroy the PCB.
Alain Verbeke
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For those still looking for the white luminescent film for the display that is no longer available at Conrad, I found another supplier: www.reichelt.com in Germany. Part number: EL-FOLIE 1010WS and HS-Code 94059900. I bought 2 of them to replace the bad ones in my Beolink's 7000 and they work great. 

 

skolesen
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Hvidovre, Denmark
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Alain Verbeke:

For those still looking for the white luminescent film for the display that is no longer available at Conrad, I found another supplier: www.reichelt.com in Germany. Part number: EL-FOLIE 1010WS and HS-Code 94059900. I bought 2 of them to replace the bad ones in my Beolink's 7000 and they work great. 

Hi Alain.

Interesting Do you have picture of how you did the replacement?

Thanks

 

/steffen

Alain Verbeke
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Belgium
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Hi Steffen. I used exactly the same procedure as described in this post. I did not take pictures during my repair. Sorry.

 

Alain Verbeke
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Belgium
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Hi Steffen. I used exactly the same procedure as described in this post. I did not take pictures during my repair. Sorry.

 

Alain Verbeke
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Belgium
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Hi Steffen. I used exactly the same procedure as described in this post. I did not take pictures during my repair. Sorry.

 

skolesen
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Hvidovre, Denmark
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Alain Verbeke:

Hi Steffen. I used exactly the same procedure as described in this post. I did not take pictures during my repair. Sorry.

Hi Alain,

Recieved the white luminescent film a few days ago and you are right. Just use exactly the same procedure as described in this post.

Thanks for the tip.

/steffen

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