Instruction Manual

Repair
DN00283717 © Nokia Corporation 19 (26)
Issue 2 DRAFT 1 - en Nokia Proprietary and Confidential
Caution
10. Very carefully draw the optic cables out of the enclosure through the hole
they are fitted into the enclosure.
11. Remove the four M6 x 40 fixing screws which secure the enclosure to the
wall.
RU IP64 weighs 11 kg so be very careful while removing the screws.
12. Lift the RU off the wall, then store in a safe place.
13. Obtain a known good RU and carefully place it on the wall.
14. Carefully support the RU and secure it to the wall using four fixing screws.
15. Very carefully draw the optic cables into the enclosure through the same
hole they were removed.
16. Very carefully arrange the fibre optic cables in the splice holder, close the
splice box and tighten with the wing screw.
17. Remove the protective caps from the ends of the fibre optic cables and
carefully connect the two fibre optic cables to the RU. Store the protective
caps in a safe place.
18. Connect the antenna cables to the RU in their correct positions.
19. Connect the power supply cable to the RU power supply connector.
20. Where applicable, set the RU power to ON at the mains switchboard or at
the CPSU.
21. At the location of the replacement RU, verify that its power LED is lit
(GREEN) and the red FAULT LED is unlit (dark) on the RU.
22. Use the ISMMan software to check that the alarm has disappeared.
23. Send the faulty RU, suitably identified and fault symptom(s) stated, to
Nokia for repair, using the procedure advised by the local Nokia agent.
3.5 Cabling
Faulty RF cables and FO cables should be replaced.