e-licktronic Forum

plaque@aon.at

Hi there, i had the same problem. You need to use shielded audiocables to bring the noise from the Nava to the Extra9 mod and back. That solves the problem!

plaque@aon.at

@gihaume Thank you very much - my Hihat filter is almost clean now! Another problem...i checked the bassdrum with the E9 mod now, and found that it gets noisy when the E9 mod is in place. It´s around the Pitch modulation of the Extra9. The circuit is passive and so simple that there can not be a mis...

plaque@aon.at

@gihaume Thank you! With another powersupply most of the hum is gone. There is still some humming depending on the position of cútoff and envelope potentiometers....not a psu problem any more.. Someone wrote: "At last I had to change some resistors value to get the HH filter quiet. I replaced R...

plaque@aon.at

@ Klanggenerator Thank you for for answer... These capacitors are good. As i use a 16V power supply now, most of the hum is gone - but, depending on the settings of utoff and envelope potentiometers there is still some humming to hear....also when i use a 18V power supply. Also: when i switch in the...

plaque@aon.at

Hello there! I am almost finished with the E9 mod. Nava was tested without mod: perfect. Everything works fine with the mod, but when i switch in the filter on the Hihat, it basically works (HP/BP/LP) but with terrible hum on it, changing a bit when turning cutoff or envelope on the E9. Sounds a bit...

plaque@aon.at

Hello there! I am almost finished with the E9 mod. Nava was tested without mod: perfect. Everything works fine with the mod, but when i switch in the filter on the Hihat, it basically works (HP/BP/LP) but with terrible hum on it, changing a bit when turning cutoff or envelope on the E9. Sounds a bit...

plaque@aon.at

HAHA!!! Solved the problem. On the PSU board i discovered there was a "R40" missing, which is not mentioned in the building instructions and not even found in the .brd file!!!!!!
Nava 1.02 board: add a bridge where R40 is written on the PSU board - near J10.

plaque@aon.at

...and i found out one more thing....the 5V i measured on the Pin 10 (Power supply) on the processor is measured against the "GND" Test point TP1. not against the GND Testpoint on the ICSP connector - its just round 2,5V. These two GND test points seem not being connected with each other.....

plaque@aon.at

....i checked the two connections from the CPU to the crystal. Continuity is ok, but there is only a little DC voltage (checked with oszillograph)...maybe the CPU gets no clock? How should the signal on CPU pin 12&13 look like?
That would make sense that nothing is working at all.....
Thank you!

plaque@aon.at

Hello, i just wanted to boot my first Nava, but i get no response on the display, no LEDs lit etc.... Voltages are fine. Pin 1 on IC118 (MCP4822) is 5V, Pin 2 of the LCD Display is also 5V, and on the ICSP connector is also 5V where it should be. Pin 10 of the Processor has also 5V like it should be...

Search found 12 matches

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Re: Display is dead, no function, but all voltages ok

Re: Display is dead, no function, but all voltages ok

Re: Display is dead, no function, but all voltages ok

Display is dead, no function, but all voltages ok