e-licktronic Forum

Hi everybody. I´m looking for someone expert who can fix my nava issues.
No characters in my display, only red boxes.
The outpus are very thin sound.
I am getting 13v instead 15v.
I repaced the ic 115 and the atmega. Sequencer running it´s solved after replacing the atmega.
Maybe something more else. Right know I am stuck, and not enough time for continue messing around.

thx in advance

PM sent!

Hello everybody. My Nava was with some issues and I wasn´t capable to fixit. So I sent it to KlangGeneretor. He fixed it everything superfast for a very very good Price. I really recomend to everyone who have nava issues to be in contact with Klang. Very profesional and very nice guy, GOODKARMA

Huertos wrote:Hello everybody. My Nava was with some issues and I wasn´t capable to fixit. So I sent it to KlangGeneretor. He fixed it everything superfast for a very very good Price. I really recomend to everyone who have nava issues to be in contact with Klang. Very profesional and very nice guy, GOODKARMA

Muchísimas gracias amigo! I'm looking forward to drinking a beer with you in Spain in near future...

KlangGenerator,

could you explain how you fixed this Nava ? It could be helpful to others Diyers

e-licktronic wrote:KlangGenerator,

could you explain how you fixed this Nava ? It could be helpful to others Diyers

Sure. The first thing not working properly on Huertos' Nava was the display. It stayed completely dark.

So I checked all traces and found a broken one between LCD pin 6 and ATmega1284P pin 25. I soldered a wire between those pins and voilà: display works.



You can also see another grey wire that replaces a broken trace at LED(+) of step button 16. The LED was also dark before adding that wire.

I was now able to do the EEPROM initialization and the adjustement of TM2 to 5v.

Next there were some issues with a few instruments:

- crash (no sound at all) - after replacing IC63 (74HC174) the crash worked
- snare - IC27 and IC32 were faulty
- clap (only noise) - it turned out to be a defective transistor 2SC2603 at Q35 (it had continuity between emitter and base) and a defective 2SA798

Also had to reheat some cold solder joints and remove a lot (!) of ugly flux. I can highly recommend this solder, as you get almost no flux residue with it: https://www.amazon.de/dp/B000V8IETU/ref ... TE_3p_dp_1

At last I replaced R694 with a wire so that the display becomes brighter.

That was mainly it!