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  • Re: Beogram 4000 carriage control issues

    Ok, As one should in a next step, I tried to verify the 6V and 24V supplies are present ! on the main board #1 I have 6V present but the 24V are infact 32V, depending on status ON, arm not lowered or OFF ?? the 24V supply is nowhere to be found: not at C of 2TR7, not at E of 0TR1, not at the SO switch...
    Posted to The Workbench (Forum) by ALF on Tue, Mar 30 2021
    Filed under: Beogram 4000 carriage & psu issues
  • Re: Beogram 4000 carriage control issues

    Well, another session with testing components: 0TR1 tested fine and so did all the other transistors from the Power supply board #2 the carriage goes back to its ES but : the BG does not completely turn off - 3IL3/4 are still on !!! as described earlier, when the carriage reaches ES it immediately travels...
    Posted to The Workbench (Forum) by ALF on Wed, Mar 31 2021
    Filed under: Beogram 4000 carriage & psu issues
  • Re: Beogram 4000 carriage control issues

    Hi All, apologies for the long delay but thanks to the corona crisis postal services are slower than a snail's pace. the new glass reed switches finally arrived and were installed in one of the reed relays. That itself wasn't a big issues, however during the "surgery" one of the micro...
    Posted to The Workbench (Forum) by ALF on Fri, Apr 16 2021
    Filed under: Beogram 4000 carriage & psu issues
  • Re: Beogram 4000 carriage control issues

    Yes, thank you Martin - that's a possibility ! I ordered a set of the reed glasstube switches as the ohm measurements in ON/Off state are inconclusive. Good lead to follow up. ALF
    Posted to The Workbench (Forum) by ALF on Fri, Apr 2 2021
    Filed under: Beogram 4000 carriage & psu issues
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