Originally Posted By: Boelle
did at test with the ohm meter... when i do pres shift there is a short between the 2 contacts on the jack... so the stalk works 100% as it should... now wonder what it could be... maybe a short somewhere in the tuner? it's one of those from PCA

Ahh.. good point. Yeah, the fault could be in there. I suppose it *must* be in the tuner, even. smile

The obvious thing to do is to ensure that there are no shorts between the three pins of the stalk jack in the tuner. There should be lots of resistance measured between (any two of) the three pins when the stalk is not connected.

Most likely pins 1,2 are shorted, which would make it appear that the shift button is being pressed.

Also, when the tuner is powered ON, pin 1 of the jack should measure close to +5V at no load. Measure that between pin 1 and pin 2 (GND). Alternatively, with power OFF, check for about 4-5Kohms resistance between pin 1 and the +5V pins in the tuner.

-ml





Edited by mlord (18/02/2009 15:26)