HEIDENHAIN TNC 306 Service Manual - Manual (Page 107)

SERVICE MANUAL TNC 306/360
Page 100
HEIDENHAIN Service
19.6 Exchanging the PLC I/O Board PL400
a) Switch off the main switch
b) Loosen the plug connections and the screw terminals at the PLC I/O board
c) Loosen the screws from the cover of the PLC I/O board, remove cover and
disconnect the connecting cable to the PLC board from the PLC I/O board.