Tascam 112 MK2 joint c pcb keyboard and display

This is a very interesting unit its the display and a board at the back, some of the push buttons are pushed/broken but thats because those functions were not available on that variant, on the pcb its marked 122 112r 112

the OSC 10khz adjust and one other blank button are squeezed behin the panel and maybe just not used or maybe connected

but this is for a 112 MK2