e-licktronic Forum

Ive been building my Nava quiet successfully.

Going slowly and testing every single component along the way. Testing the voltages at the IC's and then triggering the voice with the 5v into the 'Trigger' point on the back of the PCB.

All voices are good so far, apart from the Middle Tom.

There seems to be no tonality (Oscillators) in the voice. Only the Noise part. I'm assuming this is incorrect and that it should have the tonality/pitched part of the voice triggering it in this fashion?

I have gone over all polarized components and all are correctly placed. I have also buzzed out continuity between the IC socket and the solder pad on the other side of the PCB to check they are making connection.

I did find a broken trace (These look like they might break easily) and fixed it with a resistor leg.

See the photos below, can anyone see anything I may have missed?















Thanks

check if VR14 potentiometer 'standoff leg' is not touching the thru-hole, so effectively grounding it...
i just bend it... also, d-wreck has documented this moment.

Unfortunately I do not have an answer for you, but I have a question instead. When you're triggering a voice where or how are you hearing the sound. I can't imagine you having all the wires connected between the two boards, so how does the sound get from the main board to a listening device such as an amp or even headphones. This is probably going to be a dumb question but I'd rather ask and learn than remain in the dark.

Thank you,
Danny

redstorm wrote:check if VR14 potentiometer 'standoff leg' is not touching the thru-hole, so effectively grounding it...
i just bend it... also, d-wreck has documented this moment.

I'll have a look. Thanks dude. Can you post a link to d-wreck post about vr14?

Thanks

I haven't found anything about VR14. Could someone point me in the right Direction?

I managed to Hook up my DarkTime and trigger all my Voices one by one and probe the all the points using my BitScope Micro with a 10:1 probe.

I/O board and relevant connectors used for OP.

MT are here;

MT MAIN VOICE OP


ACCENT


ENV 1


ENV 2


ENV 3


NOISE


VCO 1


VCO 2


VCO 3


Can anyone help with my I may be only getting the 'click' or short 'noise' part of the sound.

Thanks!

EDIT
Not sure if my SD Tone & Snappy issue is linked? viewtopic.php?f=24&t=1008&p=7182#p7182

OR?



viewtopic.php?f=24&t=923&p=7195#p7195

viewtopic.php?f=24&t=832&hilit=vr14&start=40#p4781

I'm reluctant to de-solder the VR as these boards are a pain in the ass to desolder as the pads come off too!

I thought this would have been fixed with the new v1.01 boards!?

Recently received 1.01a board looks to have this updated

I have the new board.........................

hofmann25,

How do you test your voices ?
What do you connect to Accent input ?

The best way to test MT voice:
-Connect +5V to IC23 pin5
-2ms Trig signal to MT trig point

Best regards,
e-licktronic

e-licktronic wrote:hofmann25,

How do you test your voices ?
What do you connect to Accent input ?

The best way to test MT voice:
-Connect +5V to IC23 pin5
-2ms Trig signal to MT trig point

Best regards,
e-licktronic

Accent input? I thought it was an output..

Wait!? 5v to IC23 pin5 and trigger to MT trigger point? Why 2 triggers?

The voices trigger fine with 5v from the Doepfer DarkTime to the voice trigger point. Do I also apply a constant 5v to IC23 pin5?

Did you examine the scope pictures?

Also I have a V1.01 board. Is the 1A newer? With shielded vias?

Thanks