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Home Forums Product Discussion & Questions BeoCord Beocord 5000 Type 49xx no sound

Viewing 11 posts - 1 through 11 (of 11 total)
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  • #46503
    davidross222
    BRONZE Member

    Tape mechanism works but record/play relay fails to pick when play pressed, so no sound.

    Location: Perth Western Australia
    #46504
    TJames1901
    BRONZE Member

    Have you opened the player up?

    #46505
    Dillen
    Moderator

    The record/playback relay should only draw when record is pressed.
    Do the VU-meters react while playing a tape?

    Martin

    #46506
    davidross222
    BRONZE Member

    Thanks, Dillen.

    From the circuit I thought RL101 needs to pick for play.  No, nil display on VU’s when recorded  tape running.

    Location: Perth Western Australia
    #46507
    davidross222
    BRONZE Member

    Thanks, TJames for your reply.  Yes, opened and replaced a number of darlingtons in circuit around RL101.  No VU’s on recorded tape.  No change on micro pin 36 !REC.

    Location: Perth Western Australia
    #46508
    Dillen
    Moderator

    Check the supply voltages to the Dolby ICs.
    Particularly the Vref (a dead C2 wouldn’t be a first).

    Martin

    #46509
    davidross222
    BRONZE Member

    Thanks,  this deep electronics is daunting for an old bloke!   But B&O have made any servicing a delight!

    I will check voltages around the Dolby ICs.

    And your suggestion of Vref will be done, too.

    davidross

    Location: Perth Western Australia
    #46510
    davidross222
    BRONZE Member

    Sorry for delay in answering, Martin!  Thanks for the leads.

    Checked all voltages including 14a around Dolby board.  All present.  But worst possible result for fault – after reassembly it works perfectly!!  Tested now with many tapes both in playback and record.

    Guess I just wait for something to show up some day … sigh

    Location: Perth Western Australia
    #46511
    davidross222
    BRONZE Member

    New thread:  what is best solvent to remove the gunk left by perished belts in tape drive??

    Location: Perth Western Australia
    #46512
    Dillen
    Moderator

    New thread: what is best solvent to remove the gunk left by perished belts in tape drive??

    IPA.
    (Isopropanol alcohol, that is. – Not the beer).

    Martin

    #46513
    davidross222
    BRONZE Member

    Thanks, martin.  But I need to buy some gloves first, because NOTHING gets the awful stuff off your skin!

    David

    Location: Perth Western Australia
Viewing 11 posts - 1 through 11 (of 11 total)
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