User's Manual Part 2

Maintenance 3EM21522AAAA
DTR-0200-SA-SIRIUS Issue 1, March 2008
6-18
STEP PROCEDURE
REMOVAL
1 Open front and rear doors.
a To Open Front Door
Release two locking screws then release two door latches.
b To Open Rear Door
Release one locking screw and then release two door latches.
2 Coordinate with NMC and switch repeater to Local operating condition.
3 Switch OFF all repeater PDU circuit breakers switching repeater main
breaker last.
4 Switch OFF commercial power source breaker supplying power to
repeater.
5 Hang “DANGER – DO NOT TURN ON – PERSONNEL WORKING” sign at
commercial power source breaker.
Before removing RF detectors, tag each as FWD or REFL. The vertical detec-
tor is the FWD and the horizontal detector is the REFL. Also do the same
with the RF power monitor cables connected to the RF coupler
. If the detec-
tors and the monitor cables are not connected properly during reinstalla-
tion, the RF power feedback signals to the main controller and to the
junction box monitor jac
ks will be incorrect.
6 Loosen SMA connectors on both detectors and remove detectors from
RF coupler.
7 Remove monitor cables from RF coupler.
8 Loosen RF coupler elbow adapter screws to allow movement of adapter.
9 Loosen RF coupler connecting nuts and remove coupler/detector
assembly.