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  • Profile picture for user Bob Olhsson

    Bob Olhsson Fri, 06/18/2021 - 10:19

    Simply that engaging a unique fanbase has become more important than ever because there are fewer "hitchhiking" opportunities for artists to utilize by hanging in the shadow of popular stars.

  • Profile picture for user Link555

    Link555 Fri, 06/18/2021 - 07:20

    Well in between a a few repairs I managed to box up the power supply and a make power interconnect cable.

    1612 Power SUpply


    COmp Cable

    The cable was build by hand.  The 225VDC leads are twisted, copper shielded and insulated. The 6.3VDC are also twisted, and shielded.  The +18,-18 are also twisted and inside the overall copper 3/4" shield.   THe cable is meant to go the compressor unit inthe rack directly above.

  • Profile picture for user Boswell

    Boswell Thu, 06/17/2021 - 07:51

    Your original post did not make clear that you had no access to the boards in any of the other Studers.

    I don't see how you can re-blow the EPROM from the faulty machine without an external reference image if you are not certain you can read it correctly in its present state.

    I'm sorry, but I can't follow your train of thought about a DAC. Where does the Write Enable come from? EPROMs in old designs like that either have logic-level write enables so that the machine can store last-used settings, or they are elevated-voltage enables that can only be activated by placing the chip in an external programmer. The Motorola part you specified is in the latter category, needing a 25V write enable. It's possible that the Studer electronics produces this voltage for writing purposes, but it would be unusual if it did.

  • Des Amos Wed, 06/16/2021 - 19:41

    In reply to by Boswell

    I can re-burn a new set of eproms.
    I cannot remove eproms from going machines. I'm a freelance tech. Can't take that risk with clients property.
    But I felt ( Possibly very erroneously) Since I can see some level of bit change at the Dac, but I don't think there is also a write enable. That this is far to small an error for it to be a fault in the firmware and went on the path of looking at the method of writing to the dac .
    I think the processor reads the eeprom to write to the Dac. So as you change switch on or change speed,
    It needs to load the last used value.
    Looking back at what I have written. I think what I though was bit level activity is just other data buss activity.
    Would be interested to know if my assumption as to the program operation is correct.

  • Profile picture for user Boswell

    Boswell Wed, 06/16/2021 - 04:48

    Does any of the other 4 similar machines have the same firmware revision? If so, you could borrow an EPROM from one that does and re-blow your suspect part with the image from the known good one.

    There is a temptation to exchange the EPROMs between machines to see if the fault moves, but I would resist that. You don't know what other locations in the memory are used for controlling unrelated functions, and if some of the other locations are also corrupted, it could cause problems. Once the suspect device is re-programmed to have the same known good contents as a working one, it should not matter which part goes in which machine, but I would test it first in the machine it came from.

  • audiokid Tue, 06/15/2021 - 20:55

    In reply to by Link555

    Link555 wrote: One thing I really liked about the old forum was the ability to past images from your clipboard directly. This one forces you to point to a file.

    The best thing members can do when adding content is to name their content well. This includes any file with the option to name! Adding tags and titles to images, videos is a really good thing to do!

    You can still point to a file but not as many at once. This helps name your content, that will benefit everyone in the long run. The difference between this and the past multi upload is taking steps to better organize everything better. Especially if a member (all of us) wants our content to be found and organized better.


  • Des Amos Tue, 06/15/2021 - 20:40

    In reply to by Link555

    Was looking along this very option as a worthwhile line.
    The studio has 4 of these machines. And they will need to work for another 5 years at least, while organisations still need to achieve any 1/4 inch recordings.
    These machines have past they're expected life and components used were only meant to last for 10 years in the case of MCM2802.
    It is a simple 16 bit word that is send from processor . In the case of replay only requirement. Only 2 words need to be sent.
    Thanks for your response.