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  • Re: Beomedia 1 and loose cable inside

    Hi, finally found the solution in the archived forum for my question! Took some time to go through all the results but it was worth. Under this entry one can find a complete sketch of the wiring of the components of BeoMedia 1 Thanks to Beobuddy! And there's the loose cable i found. It's used for transfering digital Audio from Mainboards SPDIF output to the Masterlink PCI Board input. The Operatingsystem is now on Service Pack3, IE 7 and Flash Player 11.5, K-Lite MediaCodec Pack and RAM Upgrade
    Posted to General Discussion & Questions (Forum) by RaMaBo on Thu, Jan 24 2013
  • Re: Beomedia 1 and loose cable inside

    Hi Ron, to open the case you have to turn it upside down. Then all Torx screws have to be taken out and the turn the case again. Then the lower part and the rear can be pulled out without any problems. The rubberfeet are mounted to the upper part of the case which wraps the lower part. Ralph-Marcus
    Posted to General Discussion & Questions (Forum) by RaMaBo on Thu, Jan 17 2013
  • Beomedia 1 and loose cable inside

    Hello, i bought a Beomedia 1 and it was shipped quiet fast. But unpacking there was some rumble to hear Opening the Case revealed that the power supply board had loosened and felt off the power connector on the mainboard. Seems no big problem but there's also a small cable from the PCI card routed to under the power supply board. This cable with two seperate pins was also loose on the system board near the pins for FIR (5 pin) and the System managemant bus (SMB connector 6 pin). So my question
    Posted to General Discussion & Questions (Forum) by RaMaBo on Thu, Jan 17 2013
    Filed under: Beomeida 1, loses Kabel
  • Re: Audio Aux Link and Aux Link connections?

    Hi hfat, See http://www.beoworld.org/beotech/mclconn4.htm . The last paragraph of the chapter signals says that the cables are identical. I guess even in those old days when MCl had begun there was just a bit of confusion between the engineers and the marketing people The TV AUX connector and the Audio Aux connector could be used to connect both systems with each other to route the sound from one to the other in both directions: Record tv sound at cassette deck or play audio source through tv-speaker
    Posted to General Discussion & Questions (Forum) by RaMaBo on Mon, Feb 25 2013
  • Re: BM 4400 Mexico

    Hi Soren, that the relay triggers if you touch the Base of IC3 is caused by the surrounding electric fields which you inject into the base. These humming (you can hear if you touch the input pins of TAPE or even better PHONO of a working unit) will be amplified by Darlington Transistor IC3 fed back via TR15 to input of TR16. This transistor again triggers IC3 and the positive feedback loop is closed. As a side efect the relay will be activated ;) That's how this protective circuit works. I think
    Posted to The Workbench (Forum) by RaMaBo on Fri, Mar 8 2013
  • Re: BM 4400 Mexico

    try the following: unsolder the two resistors R46 and R47 where they connect together and lead to R 45. Now measure the voltage where R46 and R47 have been connected before This gives around 1,5 V i guess. Leave +/- 35 V unconnected to the amplifier for this measurement and don't use the variac. I think the reason you get 1,5 V is the high impedance of your voltmeter. Do you have an old analog one too? If so try this. Their impedance is mostly lower around (10KOhm/V ~ 100kOhm/V).If you can measure
    Posted to The Workbench (Forum) by RaMaBo on Fri, Mar 8 2013
  • Re: BM 4400 Mexico

    In September you mentioned that all trimmers on the audio connector board 4 where set to zero. Maybe the previous owner / technician had the same problem like you, everything to low soundwise. I would try what member sonavor mentioned yesterday : Inject some constant tone around 1 or 2 kHz into the tape 1 or 2 input, set audio switches to linear and loudness off, tone control to '0', Steroe/ Mono switch to Stereo and try to measure the AC Voltage you injected into TAPE 1( or2) through the
    Posted to The Workbench (Forum) by RaMaBo on Mon, Mar 11 2013
  • Re: BM 4400 Mexico

    John and Soren, Even if the DMM is only capable of measuring up to let's say 500 Hz the correct value, it doesn't matter as long as one get a somewhat senseful reading. So 0.4 V AC at the input of the amplifier is a good working base because one can see the effect of the balance and volume potentiometers well The whole thing is a quantitative measuring to get the fault in this machine not a qualtitive. As John said all pots set to 0 (except volume of course) should give you the same or even
    Posted to The Workbench (Forum) by RaMaBo on Tue, Mar 12 2013
  • Re: BM 4400 Mexico

    [quote user="Søren Mexico"] I went after all connection and cleaned all cables connected to the computer. checked the PCB 4 (was only fitted with 1 screw) put in all screws and tightened all. P17/20 pin 1, 0.4VAC, TP101, sometimes erratic, but at times stable at 0.38VAC, TP201 stable at 3.8VAC, TP107/207 Follows volume from 0 to 1.15VAC (full volume), Balance works for right and left. Linear, filters, loudness and mono, on/off no change [/quote] I don't get it right i think.
    Posted to The Workbench (Forum) by RaMaBo on Wed, Mar 13 2013
  • Re: BM 4400 Mexico

    Happy Birthday Sören you have to be careful with software Oscilloscope. It uses the Line-In of your soundcard. The maximum input voltage is limited to 1 - 2 V which give a correct reading with the program. If the AC is higher the signal might 'only' be clipped' (get's distorted) but can make some damage to the line In. One thing that came into my mind is that you never put a signal at the tape 1 and with disconected loudspeakers switch on the bm4400 and slowly pulled the volume
    Posted to The Workbench (Forum) by RaMaBo on Thu, Mar 14 2013
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