e-licktronic Forum

Holding enter and turning on NAVA: I do not get "TM2 adjustment process". I try adjusting LCD contrast and get nothing. I try adjusting TM2 to measure +5V at TP1, but only measure -.005V

Holding Start+stop and powering on NAVA, following pressing Start + Enter: I get nothing on the LCD.. Adjusting TM3 does nothing..

Checking sounds despite non-working LCD: The ride completely distorts when i increase pitch, almost sounds like a SID chip or something, then distorts completely the higher pitch..Hi hats sound distorted and not at all like 909. Crash is extremely quiet even with level knob on full. I am missing IC43, but that's for the Hi Tom..

Also each time I power on the Nava, the start key triggers different instruments it seems like..I've never owned a 909 but this doesn't sound like correct behavior.

I soldered the LCD on one side with the header pins, and left the plastic on them, that should be fine right? (Can be seen in these pictures http://imgur.com/a/Aojuq)

Any ideas of what to check for?

Very much appreciate the help/input I've got so far, but I'm afraid I need to ask for more!

I'm actually getting no continuity anywhere on the LCD to the points on the schematic...

I suppose I will de-solder the LCD, and re-test these points, then try to re-solder if the continuity is there.

Edit: Removed LCD and continuity is there. Guess it's not a good idea to leave the plastic on the header pins...

I did destroy 2 pads removing the LCD where tracks are. Never have repaired a pad before! Guess I'll try to find some electrical conductive paint?

Does it light up on power up?

hofmann25 wrote:Does it light up on power up?

No activity from the LCD whatsoever. The sequencer and tact switches light up and look correct though, so that's good at least.