Hello everybody

I have a working Tr707, everything works fine except the accent.

The accent works on all the instruments except the snare and the hihat.

I carefully looked at the board and don't have any broken trace or solder. I have two spare 4051 so I replaced IC40 and IC41 but there's no change

I have an oscilloscope available but I'm not sure how and where to look.

Any help will be much appreciated

Regards

Bastien