Nava Schematic Errors [SOLVED ON V1.01]

Discuss Nava construction and related issues
  • Snare Drum

    Q43, Q46, Q49
    Mixed Collectors and Emitters

    Image
  • Mid Tom

    Wrong value for R124

    Image
  • Low Tom

    Wrong value for C25

    Image
  • Hi Hat

    Wrong value for R485

    Image
  • Great! Thanks!

    Can you also explain further... mixed collectors and emitters?
  • Transistor pin swaped(emmiter to collector and colletor to emmiter)
    You need see both schematics
  • peskado wrote:Transistor pin swaped(emmiter to collector and colletor to emmiter)
    You need see both schematics
    Ah, I see it now comparing Q43.
    But, whould not this mistake make the snare sound totally screwed up? Or this mistake is not "critical" I guess? Or this is just a schematic error, but not on the PCB itself?

    Have you also checked/compared the revision notes for the 909?

    "
    from #426700:
    -TOM NOISE, C54 from 2.2nF to 4.7nF, R194 from 47k to 100k to emphasize the attack of the Toms"
  • reversed transistors critical mistake, we can try it) or wait 15 08)
    I checked my nava board with dmm and it same with nava schematic.
    I saw comments about tr909 pcb revisions and nava schematic look like last revision.
    Do you have some more info about revisions?
  • Maybe these are errors in the 909 scheme? Since the 808 has errors in its scheme this is also possible for the 909?