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  • Re: Beomaster8000 project

    Hi John, thanks for coming back to me. good news first: here are the two ebay item #s for those trimmer pots fir the preamp - just type in the numbers on ebay and aa 50pOhm and 25kOhm trimmer comes up # 320529279718 and. # 320685607813 - that should work ! back to the volume issue on my BM8000: yes, I can adjust the vol level with the wheel or remote and the respective numbers come up on the assigned display but I can not hear!! any changes ! two simplified explanations: 1 either the tone/filter
    Posted to BeoGram (Forum) by ALF on Sun, Feb 24 2019
  • Re: Beomaster8000 project

    Hi John, some good and bad news to continue...... good: i checked the AD10/278 multiplexer switch pair on PC3 according to block diagram of AF, SM 2-2 and it looks like the switch is working, showing 4.9V respectively and about 30mV at ‘others’....not quite the 0V though !! Bad: finally received those attenuator ICs AD7110KN from Hongkong....put them on sockets but no change to the failing volume issue ?!! checked those voltages associated with the Buffer Amp.....TR201/203/202/204 etc
    Posted to BeoGram (Forum) by ALF on Sat, Feb 23 2019
  • Re: Beocord 8004 recording issues

    Hi Lawrence, no need to be sorry....no issue ever is too simple or basic ! thank you for your genius reply - one should never assume. I have gone almost through the comlete circuit diagram, verifying basically all voltages mentioned... no adverse findings ๐Ÿ˜ณ๐Ÿ˜ฌ The last thing I suspected would have been the inter-connect, using a 7-pin DiN cable from Steve (sounds heavenly) without any issues during Playback !! So, the suspicion was there: someth8ng is wrong in the deck with the Rec Function ?! using
    Posted to Vintage Products (Forum) by ALF on Thu, Feb 21 2019
  • Re: Beocord 8004 recording issues

    Thanks Greg, indeed it is a one-way cable I used, originally assigned for a Beogram - Beomaster connection. just received a response from Steve clarifying exactly what you suspected. I certainly wasn’t aware of the fact.....one never stops gathering experience. thank you anyway - nice of you to respond. ALF
    Posted to Vintage Products (Forum) by ALF on Thu, Feb 21 2019
  • Re: Beocord 8004 recording issues

    Is it fair to assume not many Beocord users are left among us anymore ?!๐Ÿ˜ณ turning to the Beocord 8004 SM: what I can not find are exact definitions on various testpoints.....what are you supposed to measure ? i noticed in other SMs there are defined voltages one should measure but nothing here unless blindness came over me ?! for example TP7 and TP8 on board 2 ?? so far no adverse findings why the recording function isn’t working ? the PPM works fine in PB mode, flickering up and down but
    Posted to Vintage Products (Forum) by ALF on Wed, Feb 20 2019
  • Re: Beocord 8004 recording issues

    I am waiting for a decent full-size circuit diagram - just wondering whether the BC8002 circuit would be a good start, as it only differs from the BC8004 by not having Dolby C included ?! it doesn’t look like a connection problem after close examination, so......is there a permanent ‘Record Mute’ possible preventing any incoming signal from being recorded or.....is there any source signal coming in at all ? the switch next to the Amplifier DIN plug is “missing” or provisions
    Posted to Vintage Products (Forum) by ALF on Fri, Feb 15 2019
  • Re: Beocord 8004 recording issues

    Thanks Martin for pointing out that switch at the lower front.....never noticed that one as most times only replay of tapes is used and that worked at all times ! what I noticed though there is an extra cable fitted, coming out from the side with a sticker on “remote switch only” ? I now begin to wonder if that is part or cause of the recording issue ? again, as usually only replay is used and working there was no attention drwan to that cable..... I will investigate and report back ALF
    Posted to Vintage Products (Forum) by ALF on Thu, Feb 14 2019
  • Re: Beocord 8004 recording issues

    Ok, the switch at the lower front is set correctly, the added cable turned out to be not original and was fitted to the keyboard operating a kind of remote control - I removed it, it had no impact in to the issue at hand. I noticed the MPX switch had been removed and there are jumpers in placed - looks it had been bridged ?! well, there is still no audio signal coming from a selected source when Record is activated ? ‘Rec open’ lights up, Record is flashing....but no flicker on those
    Posted to Vintage Products (Forum) by ALF on Thu, Feb 14 2019
  • Beocord 8004 recording issues

    greetings All, while waiting till chinese ’new year celebrations’ are finally over to get parts for the BM I decided to give my BC a service, replacing belts and rubber tyres (thanks Martin) when I noticed the it stopped recording ?!! now, usually I only play tapes but the other day was something really interesting on the FM....put a blank tape in, activated ‘record on’, pressed ‘record’ but not sign of anything on the PPM nor any audio on the tape ๐Ÿ˜ก what am I
    Posted to Vintage Products (Forum) by ALF on Wed, Feb 13 2019
  • Re: Beocord 9000 Repair

    Thanks John, my thought precisely - probably only reserved for loyal B&O customers, spending more than $5K ๐Ÿ™„๐Ÿ˜ at any one time ALF
    Posted to The Workbench (Forum) by ALF on Mon, Feb 11 2019
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