Merlin 3070 Service And Maintenance Manual page 240

1.
Remove the front panel of the control unit or Expansion Unit.
2. Set the power switches on the control unit and the Expansion Unit to OFF.
WARNING: DO NOT INSERT MODULES IN THE CONTROL UNIT OR
EXPANSION UNIT WHEN THEY ARE RECEIVING AC POWER.
3. Locate the leftmost unoccupied slot (color-coded blue on the unit label)
in the control unit or Expansion Unit.
4.
Remove the protective cover from the slot by pressing down on the rib
at its top with the tip of a screwdriver and pulling out on the cover
(Figure 2).
5. Align the module in the slot (Figure 3), making sure the edges of the cir-
cuit board are in the top and bottom grooves of the slot.
Figure 2.
Removing the Protective Cover
Figure 3.
Installing the Module (Typical)
Protective
Cover