AT&T MERLIN LEGEND Installation & Maintenance Manual page 115

Installation
9. Connect one end of the cable with the 3-pin connectors to the
header labeled P101 on the power supply circuit board.
Connect the other end of the cable to the header labeled P1
on the ring generator (see Figure 16).
10. Connect one end of the 4-pin cable to the header labeled
P202 on the power supply circuit board. Connect the other
end of the cable to the header labeled P2 on the ring
generator (see Figure 16).
11. Use the clips provided with the ring generator to attach the
cables to the inside edge of the plastic housing (see
Figure 16). Make sure the cables do not lie across the circuit
boards.
12. Replace the left half of the module housing.
13. Carefully turn the module over and replace the five screws.
14. Stick the modification label "Equipped with 129B Freq. Gen."
to the wire manager on the front end of the power supply
module.
15. Place the power supply module back in the carrier.
Add a Foil Shield to the Power Supply Module
For each expansion carrier, you must install another power
supply module for the additional line and station modules. The
added power supply module can cause excessive noise on the
module immediately to its right.
To eliminate the noise, apply copper-foil shields to the power
supply module housing. These shields and their labels are
packaged in the power unit shielding kit included with the
expansion carrier.
Follow these steps to install a copper-foil shield (see Figure 17):
1. Lay the power supply module on a flat surface with the right
side up (as viewed from the front edge).
The Control Unit 3-7