Avaya MERLIN MAGIX Maintenance And Troubleshooting Manual page 88

Remove the power supply. See
4-9.
1. Place the power supply on its left side and remove the five screws.
2. Carefully turn the power supply over on its right side and then remove the top of the power
supply housing.
3. Detach the cables from the inside edge of the plastic housing by removing them from the clips.
4. Disconnect the 4-pin cable from the header labeled P202 on the left side of the power supply
circuit board. You may need to pry back the clip to free the cable.
5. Disconnect the other cable from the header labeled P101 on the right side of the power supply
circuit board. You need to grip this cable firmly and pull forcefully.
6. Remove the four screws from the ring generator, as shown in the illustration.
7. Remove the ring generator.
8. Position the replacement ring generator. Align the screw holes.
Make sure the P1 header on the ring generator is on the same side of the power supply
housing as the P101 header on the circuit board.
9. Replace the four screws and fasten them to secure the ring generator.
10. Connect one end of the new ring generator's cable with the 3-pin connectors to the header
labeled P101 on the power supply circuit board.
This cable connector, as with all four of the cable connectors, is keyed so that you cannot
attach it to the header if it is turned the wrong way.
11. Connect the other end of the cable to the header labeled P1 on the ring generator.
The cable headers, P1 and P101, should be on the same side of the housing, so that the
cables are not crossing each other.
12. Connect one end of the new 4-pin cable to the header labeled P202 on the power supply
circuit board.
13. Connect the other end of the cable to the header labeled P2 on the ring generator.
14. Attach the cables to the clips on the inside edge of the plastic housing.
15. Replace the top of the module housing.
Take time to ensure that the on/off faceplate on the front of the power supply housing is
aligned and inside the top cover.
16. Carefully, taking time to make sure the on/off faceplate stays aligned, turn the module over and
replace the five screws.
17. Verify that the modification label (Equipped with 129B Freq Gen) is attached to the front of the
power supply. If not, attach the label supplied with the new ring generator.
18. Reinstall the power supply. See
page 4-11.
''Removing the Power Supply Module (Plastic Carrier)''
''Reinstalling the Power Supply Module (Plastic Carrier)''
Control Unit Problems
on page
on
Power Supply Problems
4-7