Peavey Centurion no Auto mix input

[g1]

edit: the layout does not match the one in the Mark III pdf

[drewl]

Auto mix jack is bad

Just pulled it and the tip connection is broken, so when a plug is inserted it never breaks the ground connection.

Forest through the trees....

Thanks.

[Enzo]

In your labeled photo, it appears to my failing eyes that the T and R contact pins are soldered to the same trace in each jack.