SergeModular

FYI my system is:
i have 3 mboats powered from a ps4 and 5 mboats, plus two TKB's, plus 4 older serge 80's panels powered from a ps12, plus a small old serge panel powered from a custom psu that my tech has build.
all psu's are grounded together and then the ground go to five patchpanels, four in my frac-racs (two of them are metalbox patchpanels, one is custom, and the other is onboard a metalbox vc-divider module) and one in my euro racks (Makenoise format jumbler)

thanks again,
Bakis.


Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
[Doepfer_a100] group owner
www. parallel - worlds - music. com
www. myspace. com/ parallelworldsmusic
www. myspace. com/ interconnectedmusic
www. myspace. com/ memorygeist
www. DiN. org. uk
www. musicamaximamagnetica. com
www. shimarecords. co. uk
www. rubberrecords. gr
Athens - Greece

--- On Thu, 6/4/09, Bakis Sirros <synth_freak_2000@...> wrote:

> From: Bakis Sirros <synth_freak_2000@...>
> Subject: PSU wierdness happening in my Serge!
> To: "Serge Modular Users Group" <sergemodular@yahoogroups.com>
> Date: Thursday, June 4, 2009, 8:01 AM
> hello list,
>
> i have already emailed Rex and waiting for his replies
> about this problem of mine, but i thought i could ask here
> too, as there are some really good techs on this list that
> could also help me:
>
>
> 'i got the 'dual osc', 'stereo mixer' mboat today...
>
> after connecting it (together with two more mboats) to my
> ps4 and then i turned on the ps4, i saw that only the
> -12volts green leds were lighting in all my 3 mboats that
> were powered from the ps4!
>
> of course i got worried and turned the ps4 off.
> after various experiments with checking the internal psd of
> the new mboat i got today, i saw that the ps4 with the new
> mboat and one more mboat worked fine!
> but when i was connecting the third mboat then that wierd
> thing happened again! ( only the green -12 volts led
> lighting).
> so, i thought that maybe this specific combination of the
> three mboats did not wokred well with my ps4. (why?)
> so, i decided to take an mboat from the other mboats that
> were powered from the ps12 of mine. (FYI, i have 11 mboats/
> older panels powered from a ps12)
>
> so, i changed this mboat removed it from the ps12 and put
> it in my ps4 psd.
> so, now my ps4 was powering three mboats and all worked
> fine!
>
> so, after connecting all grounds and putting all things
> together, i saw that the ps12 had the exact same symptom!
> (only the green leds lighting of the -12votls)!
>
> but, it gets more weird!
> after powering off the ps12 and the ps4, and then re
> powering them on everything worked fine!
>
> so, now i am in a state that sometimes i power on my serge
> (first the ps12 and then the ps4) and it works fine and
> sometimes i power the serge on and does this strange thing
> (of the -12votls working only!)
>
> i really do not know what to do because i want my big serge
> system to always work fine.
>
> i thought that this problem maybe has to do with the ground
> cables (that now i have many of!) but even when unplugging
> some of them, the same thing kept happening sometimes.
>
> it is really crazy... i do not know what to do...
>
> i checked the grounding of some of my power strips (i have
> a lot of them connected in a serial manner!!) and seems
> fine...
>
> please help anyone?
>
> all these started today, after adding the dual osc, stereo
> mixer mboat to my system. BUT, i do not think that it has
> any problem, as this mboat in its own works fine!
>
> any ideas?
>
> maybe my system is now TOO big and the grounding circuit
> acts wierd...?
>
> help please!
>
> what to check?
>
> many thanks in advance!
> best regards,
> Bakis.
>
>
> Bakis Sirros - Parallel Worlds / Interconnected / Memory
> Geist
> [Doepfer_a100] group owner
> www. parallel - worlds - music. com
> www. myspace. com/ parallelworldsmusic
> www. myspace. com/ interconnectedmusic
> www. myspace. com/ memorygeist
> www. DiN. org. uk
> www. musicamaximamagnetica. com
> www. shimarecords. co. uk
> www. rubberrecords. gr
> Athens - Greece
>
>
>
>