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booting problems of my G1 modular

Postby AP001 » 17 Jan 2020, 22:16

Hi ,
I am having problems with my Nord modular G1. The problem is that it starts slowly, it may take 10 minutes or more ..., I thought it was broken, but when you leave it for a few minutes and make several attempts it works. I tried to adjust the 3.3v regulator by cutting the leg that is going to ground and then inserting a Multi-turn adjustment potentiometer to leave a voltage of 3.3v. But it has not worked. I know of some nord, other models that consume a lot of current, but are only restarting constantly, this seems a different problem. Anyone know what it can be about?

Thanks and a hug !
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booting problems of my G1 modular


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Re: booting problems of my G1 modular

Postby jamesattfield » 30 Jan 2020, 21:32

Hi, just so your post does not go without any replies, I have only G2's so don't have experience of G1 but I can suggest two possibilities which are common to electronics in the hope that they may help. If firmware related, the boot prom or the OS flash RAM might have become borderline. Perhaps the reload of an OS (especially if one would also reload the boot prom) might refresh the firmware. Second, perhaps a dry joint or hairline crack in a PCB trace which closes when the machine warms up? You look like you know how to use a soldering iron - perhaps going around the boot prom and flash chip might give a clue?

Good luck anyway, do post and let us know how you get on - I think there are still people here :)
James

Yamaha EX5, AN1X, TG500, Moog Werkstatt, Korg Wavestation SR, Sigma, Legacy Digital, Nord Modular G2, G2 Engine, Focusrite PRO 40, MIDISPORT 8x8/s, Uno, Arturia Keylab 49 MkII, BeatStep, V Collection, Pigments | Love keyboards but so little time :(

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Re: booting problems of my G1 modular

Postby AP001 » 31 Jan 2020, 08:07

jamesattfield wrote:Hi, just so your post does not go without any replies, I have only G2's so don't have experience of G1 but I can suggest two possibilities which are common to electronics in the hope that they may help. If firmware related, the boot prom or the OS flash RAM might have become borderline. Perhaps the reload of an OS (especially if one would also reload the boot prom) might refresh the firmware. Second, perhaps a dry joint or hairline crack in a PCB trace which closes when the machine warms up? You look like you know how to use a soldering iron - perhaps going around the boot prom and flash chip might give a clue?

Good luck anyway, do post and let us know how you get on - I think there are still people here :)





hello I discovered that the cpu is defective, this situation I had with a dsp of korg 2000, the same problem, I think in a few days I have a new one to install. I am commenting and thank you very much for your response
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Re: booting problems of my G1 modular

Postby Jasxon » 30 Jul 2022, 01:27

Hi there,

I have a similar issue with my G1. Can you please tell me where I can get a new CPU?
I’ve tried multiple things to get mine working.

Kind regards,
Jasxon
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Re: booting problems of my G1 modular

Postby oscarthesquirrel » 21 Oct 2023, 10:44

Re-opening this thread...

My original Nord Modular rack version has just died...at least the system won't load although the prime culprit seems to be the EPROM (? boot loader issue? power supply to pin16 of the EPROM?). Maybe the caps on the power supply ?

Curious to know abut the CPU failure - how was that diagnosed ? Which component specifically was replaced ?

IMG_5160.jpg
IMG_5160.jpg (2.02 MiB) Viewed 2922 times


Anyone found a source for the EPROM bin file ?

Steve
Last edited by oscarthesquirrel on 22 Oct 2023, 04:09, edited 1 time in total.
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