TM3 calibration

I followed the steps and never found anything about TM3 value.
TM4 is 130mV in the noise section
TM2 and TM1 set two periods in the cymball
TM3 just sits there ?

Did i miss something ?

Also, handclap is muted (maracas is not) for the moment but I will try first what I found on other threads,

"Q28 or Q29 doesn't work properly . Try to replace first Q28 then Q29 "
I dont know how to test them so Ill change both.

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

http://imgur.com/hevr78Q

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.