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kees.de groot

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  • in reply to: Beomaster 7000 audible ticks when display changes value #125518
    kees.de groot
    BRONZE Member

    Hello! I’ve replaced all caps on the power supply and pre-amp boards, including the relays and big 10000 uF caps. The tick is still audible for every interaction with Beo4 or MCP 6500. I have resoldered and checked the connections on PCB5 and the wires going to the pre-amp board and relay daughterboard. Tested with two different sets B&O MKIII and a set Bosscom MKII cable, same result (shockingly the fully wired MKII cable did not improve anything). Any help would be appreciated. Could it be my Beolab 9’s contain the fault? NB: Wiring the BL9’s in “series” does not change it either.

    in reply to: Beogram CD 7000 laser assembly moves violently #125308
    kees.de groot
    BRONZE Member

    I’ve yesterday replaced all caps on the servo board and the knocking sound is much less. Seems like it may fix itself over time? I’ve also replaced the new 47 μF Vishay cap I had placed with the 33 μF one in the kit. I noticed no difference with the 47 or 33 μF.

    kees.de groot
    BRONZE Member

    Hi Martin, nice to hear from you. I’ve purchased the service kit from DK Sound Parts, I think these caps might be included, where can I find this specific circuit?

    Kees

    kees.de groot
    BRONZE Member

    I just checked and when I switch SOURCE from AUX to TAPE (BC7000 switches on), the tick is also audible. Moving SOURCE to the BGCD7000 does not give a tick. I’m confused! I’m waiting for the service kit and will report back if that fixes it.

    kees.de groot
    BRONZE Member

    Hi TK,

    That sounds rather interesting indeed! I have decided to recap the BM using the kit provided by DK Sound Parts, I’ll see if that changes anything. The PL cables I have currently in use are made by B&O and are (I think) the MKII kind: they’re quite slender plugs (tiny Bang & Olufsen logo) with a thin cable. Should be the shielded kind. It should work, considering they are original cables! Changing source does not give the same ticks.

    I can follow your reasoning as to why and how the pulses may be the cause. However, changing the bass/treble levels (and thus displaying different values on the display) gives the same ticks. Would you say the bass/treble information is also transferred to the Beolabs through Datalink the same as the volume level? In that case I had no idea the speakers were managing the EQ and not the pre-amp in the BM!

    best, Kees

     

Viewing 5 posts - 1 through 5 (of 5 total)