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MERLIN LEGEND Communications System Release 6.1
Installation
555-661-140
Issue 1
August 1998
Upgrading the System
Page 9-12
Upgrading the Control Unit
Replacing the Housing Clips
!Remove the housing clips from the right side of the module.
a. Remove the rightmost module from the control unit. See
“Removing a Module” in Chapter 2 for instructions.
b. Using a flat-blade screwdriver, unscrew the upper right corner of
the carrier only far enough to free the clip.
c. Pull the top-right corner of the carrier toward you while grasping
the housing clip and pushing it away from you (to free it from the
carrier).
d. When the clip is free enough to clear the screw molding on the
back of the carrier, slide the clip out and discard it.
e. Compare the Control Unit Diagram with the existing control unit. If
you are installing an additional expansion carrier in this upgrade,
do not replace the clips on the right side until the last expansion
carrier is installed. If no more carriers are to be installed, replace
the clip now, making sure the clip is as far to the right as possible.
f. Secure the screw, and then repeat Steps b, c, and d for the lower
right corner of the carrier.
!Remove the power supply module to access the housing clips on
the leftmost side of the carrier. See Figure 9-3 on page 9-11
.
a. Press up on the tab at the bottom rear of the power supply.
b. While the tab is unlocked, pull the power supply towards you, then
lift it straight up.
!
WARNING:
!
Beware of hazardous voltages.
Whenever the carrier connections are exposed, use extreme
caution; do not touch them directly or with any type of tool.
Follow all procedures carefully.