HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 159)

SERVICE MANUAL TNC 415B/425
Page 154
Issue: 20.08.95
21.2 Exchanging the Logic Unit
21.2.1 Observe the exchange instructions (section 21.1) !
21.2.2 Dismounting the Logic Unit
a) Switch off the main switch.
b) Loosen all plug connections and clamped joints at the logic unit.
Round connector
Loosen knurled coupling rings (TNC 415B/F only)
NOTE:
If a PL400/410 is mounted on the upper side
of the housing, it must be removed before
dismounting the logic unit.
Loosen ground terminal and
central signal ground
B
D-Sub connector
Loosen knurled screws