
2. HARDWARE
B–63465EN/01
40
CAUTION
1 The fan unit must be removed before the base
printed–circuit board can be dismounted. If you attempt to
dismount the base printed–circuit board without removing
the fan unit, both the fan unit and base printed–circuit board
may be damaged.
2 If there is an I/O Link cable under the unit, an attempt to
dismount the base printed–circuit board without removing
the cable may damage the plastic case.
3 When the base printed–circuit board is dismounted, the
content of the Digital Servo Adapter SRAM memory may be
lost while it is kept dismounted. Before dismounting the
base printed–circuit board, be sure to save the content of
the SRAM memory to the built–in FROM. See the relevant
description in Appendix E or F.
4 When dismounting and mounting the base printed–circuit
board with the battery connected, be careful not cause it to
touch other metal portions, because the battery voltage is
being applied to the printed–circuit board.
1) Detach all cables other than the battery cables. If there is a cable in the
lower section of the unit (on the base PCB and HSSB board), do not
forget to detach it also. (Check that a detached connector is labeled its
connector number.)
2) Dismount the fan unit by following the dismounting procedure
described in Section 2.5.2.
3) Hold the base printed–circuit board by grabbing its handles, A and B.
(See Fig. 2.6.1.)
4) Pull out the base printed–circuit board by pushing it at handle B.
NOTE
1 The battery is attached to the face plate of the base
printed–circuit board. It is pulled out together with the base
printed–circuit board.
2 The base printed–circuit board can be dismounted without
removing HSSB boards; cables attached to the option
boards must be dismounted, however.
2.6.1
Methods for
Dismounting and
Mounting the Base
Printed–circuit Board
Dismounting procedure