HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 170)

SERVICE MANUAL TNC 415B/425
Page 165
Issue: 20.08.95
21.7 Exchanging the PLC I/O Boards
21.7.1 Exchanging the PLC I/O Board PL 400
a) Observe the exchange instructions in section 21.1!
b) Switch off the main switch.
c) Disengage the connectors at the PL 400
d) Unscrew the cover of the PL 400 and disconnect the cable to the PLC graphics board from the PL 400.
Loosen Loosen
cable clip screws