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Home Forums Product Discussion & Questions BeoCord Beocord 5500 will not stop

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #45609
    herrit
    BRONZE Member

    I have just replaced the two belts within my Beocord 5500 and powered it up. Both belts seem to be doing their job. When I press Play, FF, RWD & Turn on the main keypad the cassette transport mechanism does what one would expect, and the tape goes in both directions. If I press the Play button on the fascia it starts and stops. (The drive pins continue to rotate for ~4 seconds).

    But … if I press Stop on the main keypad, whilst the tape mechanism stops & the pinch rollers retract, the drive “pins” do _not_ stop rotating, unless I press Play on the fascia twice, and/or turn off the power.

    So it looks like the Stop button on the control panel is only activating the head & pinch roller retraction, and not stopping the drive motor. I have undone & re-seated the ribbon cables, & I am 99.9% sure they are good. I never needed to remove the ribbon cable that goes to the main control panel, so I can’t see how I could have mucked that up.

    Any ideas? Whilst I have downloaded the Service Manual, interpreting the electrical diagrams is beyond my pay grade.

    Many thanks!

    #45610
    filip_kbh
    BRONZE Member

    Not sure what you mean by “drive pins” … a picture?

    Location: Copenhagen
    #45611
    Glitch
    BRONZE Member

    I assume that you are asking about the capstans?

    I’m not familiar with the BC5500, but on other Beocords the capstan turns whenever the deck is not in standby.

    Glitch

    #45612
    herrit
    BRONZE Member

    Sorry for not being clearer. By “drive pins” I mean did mean the capstans, yes – I had thought that the capstans were the plastic “gears” that go through the centre of the cassette. My bad.

    • When I turn the deck on the capstans (and flywheels below etc) are stationery
    • When I press PLAY (on the slide out control panel or front panel or Master Control Panel) the capstans rotate & the tape plays
    • When I press STOP on the fascia the tape & the capstans stop. (The capstans actually continue to rotate for ~4 seconds, then stop).
    • When I press STOP on the slide out control panel OR the Master Control Panel the tape mechanism stops & the pinch rollers retract, BUT the capstans do _not_ stop rotating, unless I press Play on the fascia twice, and/or turn off the power.

    I assume that you are asking about the capstans? I’m not familiar with the BC5500, but on other Beocords the capstan turns whenever the deck is not in standby. Glitch

     

    Thanks @Glitch – it looks like what I have then is “normal” for a B&O tape deck. But it does seem strange behaviour to me, and can’t do much for prolonging component wear.

    #45613
    Glitch
    BRONZE Member

    But it does seem strange behaviour to me, and can’t do much for prolonging component wear.

    For some bearing technologies, the highest wear occurs when the mechanism starts. I think that this is because motion is needed to create and maintain an oil film. Bearing wear is negligible after the bearing reaches equilibrium. B&O probably made this design decision in order to minimize wear.

    Glitch

    #45614
    Dillen
    Moderator

    It wears out the motor brushes instead.
    Anyway – your deck acts normally.

    Martin

    #45615
    Glitch
    BRONZE Member

    It wears out the motor brushes instead.

    Good point.  The brushes certainly wear out (and don’t appear to be a serviceable part).

    Glitch

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