cosmosuave Posted June 25, 2014 Report Posted June 25, 2014 Near the end of my build and last night I went to calibrate the AOUT_NG module and have no CV on P8 which I set for unipolar mode... I guess the first thing to look for is bad solder joints any other things i should look for? I set that port as AOUT Ch8 and initialized it as well... ANyway I am so glad I have gotten this far with the build and it is working... Thanks... bri. Quote
jrp Posted June 25, 2014 Report Posted June 25, 2014 Is the DAC outputting your CV (measured directly at the DAC-chip)? If not the chip might be bad (had this once - one ch not working). If the DAC measures finde the problem is somewhere around the opamp buffers or trimmers. Quote
cosmosuave Posted June 25, 2014 Author Report Posted June 25, 2014 Okay I better look at the DAC sheet for the pinout config... Thx... If one channel is dead I can live that... Quote
jrp Posted June 26, 2014 Report Posted June 26, 2014 should be pin 9 if you are using an AOut NG. Mybroken channel sits at a voltage a little bit above 0v no matter what i send to that output. If it´s the same for you you should check if there is a short somewhere around that pin, JP2 or IC4. Removing any jumpers on JP2 would be my first action. Around JP2 it is also possible to connect CH8 to one of the other output circuits (CH1-7) to check if it´s working then. Quote
cosmosuave Posted June 26, 2014 Author Report Posted June 26, 2014 Thx for that info as I will chwck tmmrw... I also have to install new 1/8 jacks as the do not grip the end of my patch cables... This will involve drilling 16 new holes and the existing holes will look lime ventilation or I could civer with a sticker... Quote
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