LED resistors for Sum V2
Hi folks,
Once again may I get the resistors that control LED brightness for the Sum V2? All I had were ultra brights unfortunately and they are way to bright with the default resistance value. Thanks!
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Natural State - Left channel not working
Greetings
I've acquired a SMD populated Natural State and the left channel doesn't work at all.
I've replaced all ICs with the exception of the TL072 op-amps and reflowed every component in the board. (in the left channel area).
I see that the left CTRL LED dimly cycles following the LFO rate at times, but that's about it for what activity I can see when the module is powered up.
Unfortunately I have not been able to use my multimeter because the power cables in my case are pretty short.
Apart from replacing the TL072 op amps. Any other ideas of what could cause the left channel to not work at all?
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st-modular
Feb 25
Hey Enrique,
You’ve already worked through most of the recommended troubleshooting steps. It might be worth checking the orientation once more. Also, could you take a closer look at the sockets? A few of them appear a bit suspicious:
Thanks,
Stefan
Increasing resistors for high brightness LEDS on Serial
Hi folks,
I got the presoldered PCB for the Serial module and my LEDs are super high brightness which usually need around 4.7k - which resistors would be correct to replace for lowering LED brightness?
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st-modular
Feb 17
Hey Eric,
GATE Outputs: LR_1 - LR_7
PULSE Out: R70
LENGTH LEDs: R38-R41
CLOCK LED: R68
Best,
Stefan
Help with Sum Mix and Pan module please!
Hi folks - grateful for any advice!
Just finished my second ST Module and have run into problems - as in no functionality at all!
It's Sum Mix and Pan and I've found there's a short in the power header between -12v and ground. As you can see from the picture there's was a bit of solder splash in the header pin attachments just above and to the right of the power header - in my attempt to clean that up I made it considerably worse so wondering if that's the problem? If so what would be the best way to go about fixing? If not any other suggestions gratefully received.
Thanks in advance, Matt
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st-modular
Feb 11
Hey Matt,
Are you referring to this area shown below? Please check the second screenshot to see how the traces are routed there. It’s possible that a short has formed, but to find a solution we need to identify exactly where it is. Could you provide a few more high-resolution photos of that section?
In the worst case, you may need to desolder the header and then re-solder only the top two pins (1 and 2). After that, cut the -12 V trace going to and coming from pin 4 of the header and run a wire from the Pin 4 header hole on the PCB below (the one carrying −12 V to the VCA board) to pin 4 of OTA1 and OTA4. Thanks,
Stefan
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Hey Eric, Channel 1 Mix R28, AFL R21 Channel 2 Mix R34, AFL R46 Channel 3 Mix R64, AFL R76 Channel 4 Mix R89, AFL R102 Channel 5 Mix R132, AFL R144 Cheers, Stefan