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  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    It sounds tempting but looking at the topology of the board layout it would probably turn into a nightmare or another problem ?! what I did however was checking the mounted resistors 2R39, 2R40 and 2R41: R39 = 47k ohm, R40 = 47k ohm and R41 = 47 k ohm - I replaced those 3 resistors as suggested by you...
    Posted to The Workbench (Forum) by ALF on Fri, Sep 4 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    i presume you are talking about that MU switch symbol in the circuit diagram of board #5 ?! not sure if I follow here ? when I remove 2R40 switching between sources presents no problems, so I believe switching from FM to TP or PH by pressing the designated buttons seem to work fine or do I misunderstand...
    Posted to The Workbench (Forum) by ALF on Thu, Sep 3 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    Yes, confirmed: mounted 2R40 = 47Kohm ! i replaced it with a 4.7 Kohm resistor, which reintroduced the TP/PH problem 🤬 there is no third hole to install a trimmer pot for R40 ☹️ the Mute Switch: set to ON both sides show about 14.5VDC set to OFF one side 14.5VDC, the other 17VDC continuity: OFF = OL...
    Posted to The Workbench (Forum) by ALF on Thu, Sep 3 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    Yes, I agree there were different versions over its product life. to your question: the Base of 2TR6 is connected via 2R41 to 2R40, which is a 47k ohm resistor - no trimmer pot for R40 present on my board ! now the interesting thing: after taking 2R40 off the board I get a proper signal again on TP &...
    Posted to The Workbench (Forum) by ALF on Thu, Sep 3 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    under section 2-3 in the SM there is the topology of board 5 if you look at R114/214 they are marked as 1M ohm - fitted are indeed 100k ohm resistors, same as mentioned in the parts list R115/215 are marked as 2.2k ohm, fitted are indeed 4.7k ohm as mentioned in the parts list. just pointing out the...
    Posted to The Workbench (Forum) by ALF on Wed, Sep 2 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    I am using the SM downloaded from the Beoword website. the colour-marked resistors are present on board 5, also mentioned in the partslist but look at section 5 of the SM and check the topographical board #5 all 4 resistors have quite different values. all 5 bulbs came from Martin (Dillen) and come on...
    Posted to The Workbench (Forum) by ALF on Wed, Sep 2 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    I can trace an incoming TP1 signal up to 5R115/215 which looks good, however straight after 5R115/215 the signal "shrinks" to about 15% of the original amplitude. there are some inconsistancies in the circuit diagram showing different R values - it shows 5R114/214 at 1M ohm and 100Kohm at the...
    Posted to The Workbench (Forum) by ALF on Tue, Sep 1 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    I do not have a user manual for that BM either, except the service manual. the little red caps have to be tantalum caps - you can see those on pictures in a forum post 'beomaster 2000 at last'. i know the dark red ROE Röderstein caps - definitely not the one here. the -4.2 VDC I only get...
    Posted to The Workbench (Forum) by ALF on Tue, Sep 1 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    Ok, I guess some good news ?? the -4.4VDC are present at B of 5TR106/206 but only if there is no FM signal coming through, meaning inbetween stations ! that encouraged me to try once more the TP and PH inputs. with a Beogram & MMC20 CL via external phono preamp into the TP...this time a slightly...
    Posted to The Workbench (Forum) by ALF on Sun, Aug 30 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
  • Re: Beomaster 2000 type 2801 no output signal at Tape1/2 & Phono ?

    Back at work. yes,I have the -4.4V at 5C36 but 5R23 was about 2K ohm instead of 1K ohm. 5R24 is about 5.6K ohm as per circuit diagram. I also checked 5R125/126/127 ..all ok but I am scratching my head about the absence of -4.4V at the base of 5TR106/206 - all I am getting is about 0.7V feels like being...
    Posted to The Workbench (Forum) by ALF on Sat, Aug 29 2020
    Filed under: Beomaster 2000 type 2801 no output signal with TP1/2 & PH
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