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Dillen

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Viewing 20 posts - 501 through 520 (of 726 total)
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  • in reply to: Modding B&O speakers? #46133
    Dillen
    Moderator

    What other speakers did you compare to?

    Did you replace the capacitors or are the still the original?

    Martin

    in reply to: Beomaster 5500 capacitors dying? #46124
    Dillen
    Moderator

    I agree on the cleaning. A piece of paper soaked in contact cleaner pulled through the contacts – nothing more, or the very delicate platinum coating on the relay contacts will be damaged.
    – And you may find that oxidation from airs moisture already did just that.
    So – replace the relay.

    Martin

    in reply to: Modding B&O speakers? #46129
    Dillen
    Moderator

    Anyone ever thought -or tried out modding any of their speakers? I have these Beovox S45-2 ones and I do like the imaging but feel like the tweeter driver could be replaced with a better one.

    Why?

    Martin

    in reply to: Beocenter 3300 switchbank disassembly? #46049
    Dillen
    Moderator

    They are interchangeable.
    But if yours is the version with the white “see-saw”-arm between the switch rows, check that it doesn’t bind.
    Else – give it a good dose of contact cleaner to shift any dry lubricants in the release mech.

    Martin

    in reply to: Beocenter 3300 switchbank disassembly? #46047
    Dillen
    Moderator

    Two different switch banks can be found in Beocenter 3300.
    One cannot be easily diassembled – and it’s usually not necessary. Most will respond well to a shot of contact cleaner and a little exercise.

    Martin

    in reply to: Beogram 6500 only one channel working #46044
    Dillen
    Moderator

    In Beogram 6500 muting is not done by a relay but by a mechanically operated switch.
    This switch does not break the signal paths, – it grounds them. This means, that a bad contact won’t cause silence but instead the muting will fail and sound will be audible when the needle lands on the record and lifts again.

    If you are sure, your amplifier is good, I agree on:
    – Cartridge
    – DIN solders
    – Broken tonearm wiring inside carriage housing
    – Bad RIAA connection inside the Beogram
    – Faulty RIAA
    in that order.

    Martin

    in reply to: Beogram 1102 mechanism #46013
    Dillen
    Moderator

    The white head of this arm should be on the other side of the cam wheel, operated by it.
    Its head should be riding against a teflon sheet with a thick metal backing plate found under the platter.

    Take off the cam wheel, the metal plate with teflon backing and fit the arm correctly so that
    it swings the tonearm when the cam wheel rotates, dampened to a smooth travel by the spring loaded teflon sheet.

    Martin

    in reply to: Beogram 4002 No sound at all #45947
    Dillen
    Moderator

    The solenoid should NOT be lubricated.

    Martin

    in reply to: Beogram 4002 No sound at all #45945
    Dillen
    Moderator

    The solenoid is fairly sturdy. An electronic problem could cause damage to it, though.

    There should be no oil or grease on/in the solenoid. It should be clean and dry.

    Martin

    in reply to: Beogram 4002 No sound at all #45943
    Dillen
    Moderator

    If the Beogram didn’t lower the arm itself, it wouldn’t have deactived the muting circuit either.
    Pressing down on the tonearm to make the needle touch the record won’t produce sound.

    Martin

    in reply to: Beocenter 2200 #45940
    Dillen
    Moderator

    What parts are not available?

    Check if the motor bushing touches the metal bracket.
    If it does – replace the motor mounts.
    https://www.beoparts-shop.com/product/motor-suspension-rubber-bushing-grommet-f-several-beogram-beocenter-models-2/

    If the motor itself is noisy, it must be taken apart and repaired (most can be)
    – or replaced, and a good condition used original motor would be the way forward in that case.

    Martin

    in reply to: Beogram RX2 datalink #45905
    Dillen
    Moderator

    In the OP, your first schematics are for Beogram 1800 (= Beogram 2000 but no datalink), and the next is for Beogram 2000 & 5000.

    The RX-2 schematics shown in the same manual is wrong. It should’ve shown RCA plugs.

    Martin

    in reply to: Beogram RX2 datalink #45903
    Dillen
    Moderator

    The Beogram RX and TX (R for Radial. T for Tangential) models were intended primarily for customers having a non-B&O receiver/amplifier.
    They have twin RCA plugs from factory and none of them have datalink support.

    Martin

    in reply to: Where to find BD697? #45743
    Dillen
    Moderator

    If the output stage transistors are held by a long bar with threaded brass inserts, the output
    stage transistors are special in that  they have a matching, relatively large, “hole” for the mounting bar.
    If that’s the case PM me and I’ll have a look in the dungeons.

    – And check everything else in that circuit before powering up again.
    Of course also check the idle current setting. Replace the trimmer, adjust and monitor the current while slowly powering up on a variac.

    Martin

    in reply to: Beocord 5500 will not stop #45614
    Dillen
    Moderator

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

    Martin

    in reply to: Beocenter 7700 power supply problem #45524
    Dillen
    Moderator

    You need to diagnose the problem before replacing any components.
    Make sure that the problem really IS with the idle current before replacing anything.
    Chances are that you will only introduce more problems, that could make repairs more difficult – as in f.e. being unable to set the new trimmers right because the original fault is still present, keeping the Beocenter from staying powered up – and even if the original fault is found and fixed the new trimmers setting could be wrong so it still keeps shutting down.

    I would also leave the capacitors alone for now. At least until the present problem has been diagnosed.

    One thing at a time.

    Martin

    in reply to: Wanted: cassette heads #45633
    Dillen
    Moderator

    Bad tantals around the Dolby IC. I’ve seen that a couple of times.

    Martin

    in reply to: Beogram 5500 turntable – 2nd arm #45594
    Dillen
    Moderator

    Mark-sf wrote:
    B&O made the switch of sides in all of their turntables  in the mid 1980’s. They still perform the same record detection function. They became wider to display the speed while the cartridge carrier became narrower to support the smaller cartridges. The older service manuals for the 400x series provide the most detail on the tracking system.

    That’s not quite right;

    Earlier Beogram tangentials use the second arm for record detection, and the arm contains an optical sensor system (light, lens etc.).
    In order to do this the sensor arm needed to be “in front” of (to the left of) the tonearm.

    Beogram 5500 and all other type 59xx decks have the extra arm to the right of the tonearm.
    This second arm has no sensor and performs no function apart from carrying the speed indicator lights at its outer end.  In these decks records are detected by weight.

    Martin

    in reply to: Dead BeoVox 100 woofer, but continuity trace OK? #45561
    Dillen
    Moderator

    Sure it’s not something else? A broken lead or a filter problem?
    Have you tried swapping with the woofer from the other speaker?
    Does it make a very tiny click-sound when you connect your ohmmeter across it?

    Martin

    in reply to: Beogram TX2 Dust Cover #45136
    Dillen
    Moderator

    The metal top plate on Beogram TX2 is smaller than on most other type 59xx decks, so the original cover is lighter and the holding springs are different.

    Take out the springs, stretch them by hand so they end up apprx 5-6 mm longer than they were, and fit them again.

    Martin

Viewing 20 posts - 501 through 520 (of 726 total)