Air compressor,jammed control button!!!

[gervais]

hi all
well i am checking the 4 buttons that controls the Air Compressor functions:
there seems to be a problems with the pistons of these valve,they are jammed inside thir body valve if you like.

the balance switch is not working well also,
i can send pistures,i have not manged the way too dismantle it from the bike but first i need the shematic of how it is made and how it works.
i turn on the main switch of the bike,push the button and no reactions at all

thanks for the help

gervais.