TM3 calibration

Discuss Yocto construction and related issues
  • TM3 is the calibration for the handclap offset, you can find this procedure on p.14 of the original 808 service manual.
  • LOL, I was just wondering the exact same! Sorted, thanks ElSchtroumpf!
  • Can someone explain the procedure here ? All I found was a intriguing drawing :oops:
    http://imgur.com/hevr78Q
    Image
  • Hey. You need an oscilloscope. Connect probe tip to TP5 ( its called out in the original TR-808 service manual - take TP5 from the correct side of R375 (470K) can't recall which side at the moment- you can also get a reading off components directly connected to R375) in the handclap section, connect ground from the probe to an accessible ground point. You're looking for 6 Vpp (Volts peak to peak).

    Hope that helps.