Control Panel Issue

I recently starting having problems with some of the control panel switches. Some of them don't work n(e.g. zero, timer set/start) while others do work (e.g. cancel, stop time).

I am able to use an ohmmeter. Is it possible to just 'ohm out' each switch individfually with a meter? If so, where can I get a schematic for the panel and how do I remove it?

Thanks,

Al