[Elecraft] K2 headphone jack pinout ?

[Steve Kavanagh]

I think one of my K2s has suffered the dreaded headphone jack failure (no speaker or speaker jack output - headphones work fine).  To confirm this diagnosis (and perhaps to make mods to prevent it happening again) I'd like to get my hands on the pinout of the headphone jack J2.  I was surprised I couldn't find a link when searching through the list archives.  Has anyone got this info?  Which pins are the speaker switch? 73,Steve VE3SMA