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Dillen

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Viewing 20 posts - 301 through 320 (of 756 total)
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  • in reply to: Beocenter 9000 motors slow #35111
    Dillen
    Moderator

    Lubricate motor bearings.
    Replace belt.
    Clean door tracks.

    Martin

    in reply to: Beomaster 1900 Tuner issue #51657
    Dillen
    Moderator

    Are all electrolytic capacitors in the tuner area reasonably new?
    If not, that would be a place to start.

    Martin

    in reply to: Beogram 3000-5231 #51652
    Dillen
    Moderator

    The center spindle for the cam wheel can be lubricated, but all the small “rattling” arms and levers on the cam wheel should run clean and  dry.
    They must NOT be lubricated, or things won’t work.

    Martin

    in reply to: [HELP] Replace IC9 8355 Input/Output in Beocord 8004. #51648
    Dillen
    Moderator

    It’s mask programmed by/for B&O.

    But these rarely fail.
    What are the symptoms?

    Martin

    in reply to: The issue with the Rec Cal data in Beocord 9000 #51600
    Dillen
    Moderator

    I have seen cases where Beocord 9000 rec. cal ends as Metal tape detected with a CrO2 tape inserted,
    if the Beocords bottom plate is not fitted, so correct assembly is one important thing.

    Martin

    in reply to: CD5500 Philips C2103 Capacitor #51388
    Dillen
    Moderator
    1. Kit here.
    2. Yes. And it must be done in an ESD-safe environment.
    3. The service manual will tell you how.

    Martin

    in reply to: Beoplay CD 4500 – 7000 Differences? #51562
    Dillen
    Moderator

    No. The Marantz post was spam.

    Martin

    Dillen
    Moderator

    An open-circuit midrange will see all four going silent.

    I have one, refoamed and ready.
    PM me if you need.

    Martin

    in reply to: Beogram 1700 #51460
    Dillen
    Moderator

    Adjustments can be done through holes in the bottom plate. Refer to the user or service manual.
    But trimmers and/or capacitors may be bad.
    A service kit is available.

    Martin

    in reply to: Beocentre 2300 laser replacement #51399
    Dillen
    Moderator

    The laser is not specific to B&O.
    – But is that a carpet? Get it away from that!
    These are static sensitive devices, – (VERY!) easily damaged by static electricity.
    Wear an ESD protective wrist band and work on an ESD field mat as a minimum.

    And of course the shop will accept a return, but if you bought something by mistake they
    will most likely (and fairly) ask you to pay the return postage and that could, depending on your location, not be worth it.

    Martin

    in reply to: Beomaster 1600 Type17XX Capacitor Polariy #51378
    Dillen
    Moderator

    A bit difficult to measure.
    As long as one end of the capacitor is not connected to anything, only the voltage at the other end is known.
    And noone knows what it will be connected to in the future.

    A foil cap would be a good solution as well – but completely out of proportions quality-wise.
    Looking at the rest of the construction there will be other limitations playing in long before any difference from electrolytics to foil caps come into view.
    This Beomaster is not an audiophile unit in any way, – never will be and never was intended to be.

    Martin

    in reply to: Beomaster 1600 Type17XX Capacitor Polariy #51376
    Dillen
    Moderator

    Look  at the series of components; DIN socket, resistor, capacitor and transistor.

    If the resistor is nearest TR100 (and the capacitor is nearest the DIN socket), the caps positive pin should go towards the resistor.
    If the capacitor is nearest TR100 (and the resistor is nearest the DIN socket), the caps negative pin should go towards the resistor.

    Martin

    in reply to: Beomaster 1600 Type17XX Capacitor Polariy #51374
    Dillen
    Moderator

    The series of capacitor and resistor can be in either order.
    One end of the capacitor carries a known DC level ~ the base voltage of the first transistor.
    Seeing as this is an input, we don’t know the level of any DC content of the incoming signal.
    It’s a general handrule to make the positive lead face inwards.

    This also goes for line-level outputs. Positive inwards.
    So when coupling an input to an output, it will be negative pin facing negative pin = bipolar capacitance.

    Martin

    in reply to: Beomaster 1600 Type17XX Capacitor Polariy #51371
    Dillen
    Moderator

    C110 (2,2uF series coupling capacitor for phono right channel input) should have
    positive pin towards TR100/R111.

    Martin

    in reply to: Record Weight for beogram 4002 recommendations #51361
    Dillen
    Moderator

    I wondering what weight range would be good for a Record Weight for my 4002.

    None!
    Use no record weights, antistatic mats or other nasties with any Beogram.
    If your record is warped, put it under press somewhere else (not on a Beogram) or discard and replace it.

    Martin

    in reply to: 4002 repair in United States #51344
    Dillen
    Moderator
    in reply to: Most Unusual Find? #51336
    Dillen
    Moderator

    It’s not uncommon to find spare cartridges, or parts thereof, inside Beograms.
    Same goes for center pucks, stylus guards and needle brushes.
    I have also found lots of coins, keys, jewelry, LEGO bricks etc.
    Under the dust cover seems to be a “safe” place to store small items.
    When the Beogram is later moved, the things slide around and fall into the innards.

    In the larger 1930s to 1960s valve-based radios you could, and still can, sometimes find savings and love letters.
    These radios were often fairly large cabinets with room to spare, – a good and safe place to keep secrets from the wife, as she was not likely to ever go in there.

    Here batteries in a Beogram 5500, arrived here for repairs because the carriage was blocked:

    01

    03

    Close, but no cigar.

    Martin

    in reply to: Help with rebuild of Beomaster 4400 #51301
    Dillen
    Moderator

    You can see it here:
    https://beolover.blogspot.com/2020/03/beomaster-4400-type-2419-investigating.html

    Half way down the page.

    Martin

    in reply to: Beogram 1902 Dust Cover #51275
    Dillen
    Moderator

    Lay the large black hinge bracket (the rear vertical plate) flat on the table with its backside down. Put it on a thin piece of cloth or similar to prevent scratches and scuff marks.
    Place the three small shiny friction plates in place in the hinge bracket, so that they sit aligned with where the three holders will be (photo).
    From little marks they have left, you can usually see where they sat previously, and you can glue them in if you find them difficult to control.

    Put the dustcover in place in the bracket, also lying flat on the table (in what would correspond to fully open position if upright) and fit the spring to the hinge bracket at the center with a holder, a screw and a washer. Don’t mind the springs ends at this point – just let them flap around as they please until the center holder has been fitted.
    The spring has small round ends, that needs to run in the grooves at the ends of the dustcover, so make sure the spring is the right way up, or it will run with the sharp pointed ends in the groove and wear the grooves out in no time.

    Then grab one end of the spring with pliers, twist it to upright position and set the springs length down in the groove in the hinge plate (some hinge plates have small tags it needs to go around and between) and set it into the groove in the dustcover.
    Often the spring will be able to sit by itself like this.
    Put a black plastic holder in place, hold it with a finger or two while you lift up the whole assy and mount the screw and washer from the other side. Alternatively, keep it flat and slide it out over the edge of a table, just enough to fit the screw and washer from below.
    Same job at the other end.
    Takes a little practice but it’s a 2-minute job when you know how.

    Dustcover

    The above instructions for assembly of the dust cover, spring etc. is valid for the following
    Bang & Olufsen models:

    Beogram 1100
    Beogram 1102
    Beogram 1500 (Type 57xx only)
    Beogram 1600
    Beogram 1602
    Beogram 1700
    Beogram 1900
    Beogram 1902
    Beogram 2200
    Beogram 2202
    Beogram 2400
    Beogram 2402
    Beogram 2404
    Beogram 3400
    Beogram 3404
    Beogram 6000 (Type 57xx only)
    Beogram RX

    The square holders (friction brackets) are known to break.
    New parts can be found here.

    Martin

    in reply to: BEOCORD 5500 stops after 5 seconds #51092
    Dillen
    Moderator

    The motor runs all the time, when the Beocord is out of standby.

    Martin

Viewing 20 posts - 301 through 320 (of 756 total)