NAVA 1.02 // new build finished // Nothing lights on

• sequentialmood

  Posts 19

  Joined: Jun 20th, '16, 23:30

  Dec 17th, '17, 16:02

  Hello,
  
  I've just finished my NAVA build. I've turned the power ON : No led light on, LCD screen black out.
  The power on J5 on the main board seems OK.
  IC power measurements were ok during the build.
  
  Could anyone give me hints on where to start debugging ?
  
  NOTE :
  - The internal led of the LCD is On when power is on
  - power measure on every instruments :
  -> square pads : 5V OK
  -> ICs (M5218): square pads : 15V, circle pads : -15V : OK
  -> leds on the sequencer part are soldered in the right way
  Many thanks!

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sequentialmood

Posts 19

Joined: Jun 20th, '16, 23:30

Dec 17th, '17, 21:59

OK, it seems that Gnd from the IO board is not in continuity with some ground points on the sequencer part...digital ground is not grounded...
I had to put a jumper on R40 to make it worked.
No hint about this in the build guide...
now the sequencer and display are running OK.

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