Sign in   |  Join   |  Help

Search

  • Re: Schematic for ICEsystem from Beolab 7-4 wanted

    I am not sure that tweeter 4 ohm is ok. if it is same as geleraly most of B&O..than is 6 to 7 ohm. What do you mean short...hope you are not shorten + and - on tweeter cable.
    Posted to General Discussion & Questions (Forum) by marexy on Wed, Oct 16 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    This is a PCB that came back from the official B&O service where they said no repair was possible and returned the customer in such a robbed state. They probably repaired the original and sold it to another curstomer who was willing to pay the price of a new one. Anyway.... After few hours of playing and smd soldering, tuning, .. i can say ..It's alive and working :) i learn much on these project :) It's not over yet as.. will try different end-mosfet and some other tweeks log the way
    Posted to General Discussion & Questions (Forum) by marexy on Wed, Oct 16 2019
  • Re: BeoSound 9000 MKI Missing Glass panel - How does this effect the function?

    Hi You need glass panel asap ! Without one your BS will not operate as it should at least CD part.
    Posted to General Discussion & Questions (Forum) by marexy on Tue, Oct 15 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    Hi Try to change only bad one but ...it is better to change all 4 on the same side. Hemenex ..thanks Yes it is correct datasheet. If you check item TS7NF60L it is not so differnt but it is not ok ..as heating badley fast. If you put finger on ti when speaker is working and it is open...you can feel it, so from my point of wiew it's not safe to use it. There are some WWW pager that offer "" original" parts ..but i tihk all are fake.
    Posted to General Discussion & Questions (Forum) by marexy on Wed, Oct 9 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    ""Also, should I replace all ST9F3LL mosfets, or once the defective one is found I can leave the others in place? Are they failing because they don't age well or because they are used near their limits? "" Yes ..maybe they are used near their limits..can't say without shematics and correct service manual. Or just generaly poor design of PCB from start. plus i'm not el.rapir geek to be smart and i can give only my point of perspective.
    Posted to General Discussion & Questions (Forum) by marexy on Wed, Oct 9 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    Hi Jean Yes...bl4000 Mk2 have the same boards. There are no PCB Shematics....as i know of... Maybe some inside B&O info will help...hmmm In 50% ...maybe 50%... it is ok to change mosfet ST9F3LL but only with the same one as till now i did not find any other option to work and all 4 per clanalle should be changed. And i do not have datasheet for ST9F3LL. 10 ohm change if broken...no need if it is ok. In many cases there are faults on the top side of board or bad connection inside board. Note.
    Posted to General Discussion & Questions (Forum) by marexy on Tue, Oct 8 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    If any of you wish to repair it by DIY you need SMD heat gun + smd soldering iron with reguleted temperature. plus optional accessories such work! As some of smd component's are 1mmx2mm and on tight space and you can can easily destroy PCB connections on the board. With some effort I was able to repair one unit and it has been playing successfully for 3 days. I advise you not to go into repair without at least a basic knowledge of electronics. One of the ""professional ""
    Posted to General Discussion & Questions (Forum) by marexy on Sat, Sep 28 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    Now i do have some problems as i have no additional PCB's for more testing and trying to find best way and alternative to fix different errors on that PCB. So if any of you have faulty, broken, not working or partial working PCB would be happy to buy or if you wish to donate them for "" for scientific purposes"" :) My shipping costs.
    Posted to General Discussion & Questions (Forum) by marexy on Tue, Sep 24 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    ok..let's go on on these WWW site you can find interesting data. https://ham.brugtgrej.dk/forum.php?mode=thread&obj=68196 Did some additionla repair and did fix one board with STS7NF60L mosfet BUT...it's overheating and FET going to 106 degree in 3 minutes when playing. for test ..I switched back for the original ones and the overheating is gone. therefore, are not correct FET components or some elements need to be replaced before the FET transistor.
    Posted to General Discussion & Questions (Forum) by marexy on Mon, Sep 23 2019
  • Re: Beolab 4, fix it, bin it,It's worth it

    Interesting story. A colleague of mine has a friend who take for repair a pair of Beolab 4 speakers to an official B&O repair shop. Because the cost of repairing and replacing the new parts was too high, he said that he would take the speakers back and sell them as broken. The next day he came to pick up speakers. Coincidentally, I met this person few month later and offered that i look at what I could check or fix as a second opinion and as a favor to a friend. When I opened the unit, I was
    Posted to General Discussion & Questions (Forum) by marexy on Wed, Sep 4 2019
Page 5 of 57 (562 items) « First ... < Previous 3 4 5 6 7 Next > ... Last » | More Search Options
Beoworld Security Certificate

SSL