Archive of the former Yahoo!Groups mailing list: Yamaha CS80

Hi,

It is either the velosity key contacts(the ones on the right of each
pair) or the TSB input curcuit for that key. There will be three wires
to the TSB board for that key all the same colour. One of these wires
is the velosity amount.
To make sure the key contact is not the fault press down the right
contact while pressing the none working key down repeatedly to see if
it does increse the volume, if so ajust the contact until you get the
volume to match the other keys when hit at the same amount.

Hope this helps