How can I fix a stuck speed dial on a Kenwood Major?

Hi!

I accidentally opened the latch while the machine was on high speed, now the speed dial is stuck on high speed.

Is this something I can repair myself?

Any help is much appreciated:)

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0