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Latest post 04-29-2008 2:39 PM by magnushj. 39 replies.
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  • 04-15-2008 4:55 AM

    • magnushj
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    • Trondheim, Norway
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    Avant stand problem

    My avant does not return to position 0 when I put it in standby, and nor does it turn to position 1 when turned on! Sad When turned with STAND << or >> it works as it should. Has anyone seen this problem before? How does one use position 2, btw? I have tried STAND 2, STAND GO 2 etc, but nothing happens. I'm using a Beo4.

     

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-15-2008 5:16 AM In reply to

    • Jandyt
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    Re: Avant stand problem

    Hi Magnus.
    Has this problem just started, or has it always been like that? (I'm starting to sound like Keith!)
    You can't tell it to go to position 2, if it doesn't know where position 2 is.

    Andy T.

    Poor me, never win owt!

  • 04-15-2008 5:25 AM In reply to

    • magnushj
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    Re: Avant stand problem

    Hi andy!

    It has been like that since I got the avant a couple of weeks ago. I tried programming in a position 2 in the menu.
     

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-15-2008 5:51 AM In reply to

    • Jandyt
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    Re: Avant stand problem

    Menu
    Set up
    Stand
    Change the number 1 to a 0
    Move the telly to where you want it in standby (manually if you like)
    Go

    Move the Avant to a totally different position then switch it off.
    Does it park now?

    Andy T.

    Poor me, never win owt!

  • 04-15-2008 6:03 AM In reply to

    • magnushj
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    Re: Avant stand problem

    I have tried this, and it does not seem to work. I will try again when I get home today.
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-15-2008 11:45 AM In reply to

    • magnushj
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    Re: Avant stand problem

    nope, it does not.

    i have also tested the position sensing resistor in the stand, and it works flawlessly. :S Could it be that the function to return to standby position is turned off?
     

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-15-2008 11:56 AM In reply to

    • magnushj
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    Re: Avant stand problem

    After some testing, it turns out that the stand rotates a couple of degrees left when i push 1 or 0 on the remote. At one point i had it turning about ten degrees right when i pushed 2, but after some more menufiddling it stopped.
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-15-2008 4:14 PM In reply to

    • Jandyt
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    Re: Avant stand problem

    I think we need a techie then, it's  beyond my knowledge.
    I don't think the stand function can be turned off though.

    Andy T.

    Poor me, never win owt!

  • 04-16-2008 2:31 AM In reply to

    Re: Avant stand problem

    This is an interesting problem. Clearly the stand motor and its control is working correctly otherwise you would not be able to turn the TV with the arrow buttons.

    The problem appears to be with saving of the position in memory where perhaps the high order "bits" are not saved because you say the stand moves a few degrees. To prove if this is the case I suggest taking the following action:-

    • Manually move the stand to the centre position with the TV off. Make sure the cable holder at the back of the TV stand base is directly in the centre at the back
    • Switch the AVANT on and press MENU
    • Press 3 to call up the SETUP menu (4 if using SAT)
    • Press 4 to call up Stand Menu
    • Press the DOWN arrow until position 1 is displayed
    • Now use the left or right arrows and move the TV only a few degrees in one direction, then press GO
    • Now do the above process again, but this time use position 2 and store a few degrees in the opposite direction
    • After you have stored and exited, try positions 1and 2 and see the results.

    Regards Keith....

  • 04-16-2008 11:59 AM In reply to

    • magnushj
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    Re: Avant stand problem

    What the...? I was about to try what Keith suggested when I realized that the damn thing wouldn't turn on at all! No red dot, no reacting to commands from the remote, no reaction when pushing the buttons on the top of the screen.

    I have made sure the on-off-button is in the on position. Can I have tripped a circuit breaker when I pulled the cord earlier today? Or could it be that the memory-problem has gotten worse and affected the whole system? 

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-16-2008 12:35 PM In reply to

    Re: Avant stand problem

    If you do not have the "Standby" red dot, then nothing will work. The first thing to check is the 3.15 amp fuse on PCB60 (Mains distribution) and then we can go from there.

    Are you sure that you have not done anything else since it was last working ?

    As the stand control module uses the +14 volts, it could now have failed in a more solid way and pulling the power line down, causing an over-current detection to shutdown the power supply.

    Also, what is the Type number of your AVANT. Its on the base of the TV

    Regards Keith....

  • 04-16-2008 12:47 PM In reply to

    • magnushj
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    Re: Avant stand problem

    The type number is 8111. Avant 28 VCR. I watched tv last night, and a little bit this morning. No problems.

    The fuse is ok. I tried disconnecting the stand control module, but no change. 

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-17-2008 3:20 AM In reply to

    Re: Avant stand problem

    Well, we must assuming the AVANT has developed another fault not related to the stand issue.

    The problem is going to be caused by either:-

    • A component failure, normal short circuit which has caused the Power Supply protection circuit to cut in to stop damage to the TV
    • A fault on PCB60 mains distribution located at the bottom left hand side

    If you are not a technical person, then this is a job for a good TV repair shop or your B&O dealer.

    If, however you are a technical person with electronics/tv background with at least a multi-meter, then I will walk you through some actions you can take.

    Regards Keith....

  • 04-17-2008 6:02 AM In reply to

    • magnushj
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    Re: Avant stand problem

    I'm familiar with electronics, not so much tv's but try me. :)
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-17-2008 1:49 PM In reply to

    • magnushj
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    Re: Avant stand problem

    Have picked the thing apart now, and I am pretty sure that the mains distribution board is OK. At least there is continuity from the mains lead to the yellow TV-connector. I'm looking at the power supply board now, and I must admit that I have no idea where to start. Embarrassed
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-17-2008 2:52 PM In reply to

    Re: Avant stand problem

    We first need to establish if the situation is because of an actual power supply failure or an overload somewhere in the TV which is shutting down the power supply through the overload protection. This is best done at the connectors on the power supply board and below is a block diagram showing the connectors involved. Check the power at P46 between pins 1 & 2, be very careful

    The AVANT uses a Switched Mode Power Supply which means the heart of it is a 32khz ramp oscillator which is stopped if the overload protection circuit detects an overload. Without the oscillator running the 8 volt Standby voltage is not generated and is why your red standby light is not on.

    Regards Keith....

  • 04-17-2008 5:07 PM In reply to

    • magnushj
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    Re: Avant stand problem

    P46: 225V AC
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-17-2008 5:52 PM In reply to

    • magnushj
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    Re: Avant stand problem

    What the.... Plugged the set back together (well, some of it anyway, left out the VCR and powerlink module) and the standby light is back on. :) Will try to assemble the rest. Maybe it just was a loose connector?

     

    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-17-2008 6:16 PM In reply to

    • magnushj
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    Re: Avant stand problem

    And THERE I'm back to scratch. :(
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-18-2008 2:17 AM In reply to

    Re: Avant stand problem

    Well, that's good and bad. I am always concerned when a fault goes away and you don't know what caused it because it could come back. On the other hand you may have caused the problem when you were investigating the stand issue.

    So, you are back to the AVANT working completely except for teh previously defined stand issue ? or has the stand started to work as well ?

    Regards Keith....

  • 04-18-2008 4:28 AM In reply to

    • magnushj
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    Re: Avant stand problem

    I'm back to it being dead again. I turned it off again after it turned on, because i was concerned about all the hanging wires on the back. When everything was connected, it would not turn on. Problem now is that i can't seem to replicate what I did to make it work!
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-18-2008 4:34 AM In reply to

    • magnushj
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    Re: Avant stand problem

    Hmm. Tried again now, and it went to stand by. Pulled the plug, and replaced it. Nothing, back to dead.
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-18-2008 4:42 AM In reply to

    Re: Avant stand problem

    Well, it certainly sounds like you have a bad connection somewhere, which to be honest is good because you want to be sure you have found the problem.

    Given the problems you have encountered it may well turn out to be something like a "dry" solder joint. Before we start fault finding the logical way, I suggest you visually review the printed circuit boards for any dry joints, if that turns up nothing then we need to measure the various voltages out of the power supply as follows:-

    1. The voltage at C70 on PCB4 must exceed approx. 300 volts
    2. The power supply at C8 should be approx 7 Volts during start-up. If it is less, the power-supply unit will not start up

     

    Regards Keith....

  • 04-18-2008 5:20 AM In reply to

    • magnushj
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    Re: Avant stand problem

    Thanks for all your help this far Keith! I'm going to the in-laws for the weekend and won't be able to work any more on it until Sunday evening. I will check for dry joints then.
    Beocenter 9500+Beolab Penta mk2+Avant+MX7000+Beosound Ouverture+1xBeolab 6000 :)
  • 04-18-2008 5:32 AM In reply to

    Re: Avant stand problem

    No problem, happy to help..

    Let me know the outcome of your visual checks next week, but in the meantime have a great weekend

    Regards Keith....

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