Omron Programmable Terminals NT31 NT31C - Manual (Page 253)

7-3 Section Maintenance of the NT31/NT31C
243
c) When the cover has opened far enough, remove it.
b
b
b
4. Remove the CFL unit by following the procedure described below.
a) Disengage the connector.
b) Sufficiently loosen the screw that secures the CFL unit.
The screw is designed so that it cannot be removed, but if it does come
out for some reason and falls inside the NT31/NT31C, it must be extri-
cated without fail.
c) Shift the CFL unit to the right.
d) Pull out the CFL unit.
5. Fit a new CFL unit by following the procedure described below.
a) Slot the projection on the left end of the CFL unit into the hole in the fixture
inside the PT.
b) Engage the CFL unit with the fixture inside the PT.
Check that the CFL unit is in contact with the left end of the fixture and is
parallel with the fixture during this engagement.
c) Tighten the screw of the CFL unit to secure it.
The tightening torque is 0.2 N
@m.
d) Engage the connector of the CFL unit with the connector of the
NT31/NT31C so that the red cable is at the left side.
Insert the connector so that it clicks firmly into place.
Fixture inside the NT31/NT31C Backlight unit
Red cable White cable
b
d
6. Fit the cover and secure it with the screw.