booting problems of my G1 modular

[AP001]

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 !

[jamesattfield]

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

[AP001]

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

[Jasxon]

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

[oscarthesquirrel]

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 (2.02 MiB) Viewed 7899 times

Anyone found a source for the EPROM bin file ?

Steve