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Dillen

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Viewing 20 posts - 41 through 60 (of 784 total)
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  • in reply to: BeoGram CD5500 bridge rectifier diodes are very hot #69214
    Dillen
    Moderator

    Schottky diodes would make no difference to speak of.
    And they have no place in power supply rectifying anyways, that’s not what they are meant for – or good for.

    Check the filter capacitors – also any smaller ones sitting in the analogue circuits.

    Martin

    in reply to: Beolab penta mkII backlight intensity #69213
    Dillen
    Moderator

    Are your speakers MK2?
    If so, the glasses seem to be very dark – perhaps they are in fact mkIII glasses.
    See here:
    https://www.dksoundparts.com/?s=penta+display+covers&post_type=product

    Martin.

    Dillen
    Moderator

    Could suggest that the amp runs not symetrical.
    Any DC on the speaker output?

    Martin

    in reply to: Beomaster 6500 repair – internal fuses? #69209
    Dillen
    Moderator

    The other fuse lives at the back right side, on the board way down in the corner.

    Martin

    Dillen
    Moderator

    Is the 8V present for the tonecontrol circuits?
    If not, check 3TR4 (BC547B) and all filter capacitors related to the supply voltages in the preamplifier.

    Martin

    in reply to: What are you working on now? #69207
    Dillen
    Moderator

    Wrongly set tracking force?
    Bad stylus tip?
    Defective lamp or LDR for the tracking system?

    Martin

    in reply to: Beocenter 7002 #68818
    Dillen
    Moderator


    Basically the same drive as yours.
    Note the remark about the nylon washer.

    Martin

    in reply to: Beomaster 4500 Faulty Balance #68149
    Dillen
    Moderator

    Solder the old one out and solder a new one in.
    Then do NVRAM reset as mentioned in the service manual.

    Martin

    Dillen
    Moderator

    The wire goes under the cam wheel.
    Its head slides under the metal plate found under the platter.

    Martin
    in reply to: gear adjusting manual Beogram 4500 #68145
    Dillen
    Moderator

    The service manual shows how to adjust the black excentric.

    Martin

    in reply to: Beomaster 4500 Faulty Balance #66920
    Dillen
    Moderator

    First thing would be to replace the backup battery and reset the settings.

    Martin

    in reply to: Is this forum dead? #66617
    Dillen
    Moderator

    I am not as active here as I have been, I must admit.
    Down from about a dozen posts a day to a few per month.
    Discussions are now spread all over the net, which is a shame, I think.

    I am not on Facebook. Never was and probably never will be.
    I never visited Discord.
    Every B&O enthusiast has his own forum now, it seems. Or Facebook page or Instagram or …or…or…
    Having to visit hundreds of places to get information or help is frustrating and it is wasting time looking
    everywhere instead of one place – and keeping track of where what happens, where did I ask the question etc. – oh no, it’s not for me.
    Better to concentrate than to water out in my opinion.

    We don’t have many dicussions about products within my scope of interest here.
    I don’t care for TVs, I don’t care for video products more or less as a whole. I don’t care for home automation
    and I have very little interest in apps.
    I know next to nothing about the newer products, and I don’t service them.
    I don’t feel the need to make things complicated – just for the sake of doing that – when it can be done simple.
    I actually wrote a longer piece about this a while ago, but decided not to post it, as it was more or less just my own
    reflections and not really particularly helpful.

    Martin

    in reply to: Beocenter 7007 Tonearm Resets #66616
    Dillen
    Moderator

    Check the idle current settings.
    Check for DC on speaker outputs.

    Martin

    in reply to: Beocenter 2200 Tone arm lowering problem #65897
    Dillen
    Moderator
    in reply to: Beocord 9000 – keypad not responding #65894
    Dillen
    Moderator

    Some versions have a fuse on the display board. Have you checked?

    Martin

    in reply to: B&O 1953/1954 Mini 511K valve radio #65727
    Dillen
    Moderator

    You would need an FM-module,

    either FM 5A:

    or FM 6:

    Both are immensely rare.

    Martin

    in reply to: Beogram 1100 33/45 speed selector #65724
    Dillen
    Moderator

    Speed switching is done by lifting/lowering the idler wheel, running it on different diameters of the motor pulley.
    The lidting is done by rotating a wire so that the “pin” carrying the wheel moves up and down inside a “tube”.
    The mechanism could have seized up – take apart, clean and lubricate.

    Martin

    in reply to: Beomaster 3000-2 – smoky resistors! #65587
    Dillen
    Moderator

    These amplifiers blow with an “avalanche”, causing several components to burn and/or short.
    It can be very tricky to find all bad components in one go – and if you miss one, it will start all over.
    Seeing your board, I suggest you ask around for a complete amp module instead.
    Perhaps not as challenging, but easily both faster and cheaper.

    Martin

    in reply to: Beomaster 8000 Fault #65171
    Dillen
    Moderator

    Beomaster 8000 has a huge rush-in current when powering up.
    Your lamp will eat most of the voltage the Beomaster needs to start up properly, and the surge will trigger the standby for safety.
    Use a variac instead.

    Martin

    in reply to: Beogram 3000 Type 5228 – center tap stuck #65170
    Dillen
    Moderator

    Pull the spring-loaded part only.
    Not the whole round center assy.

    Martin

Viewing 20 posts - 41 through 60 (of 784 total)