User's Manual Part 2

Maintenance 3EM21522AAAA
DTR-0200-SA-SIRIUS Issue 1, March 2008
6-32
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 then release two door latches.
2 Coordinate with NMC to switch repeater to local operating condition.
3 Switch OFF all repeater PDU circuit breakers switching 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.
6 SPU –
a Disconnect all cables from rear of SPU.
b Remove rack screws from front panel of SPU.
c Slide SPU out of cabinet.
7 PDU –
a Disengage the metal strap securing the relay. Use a flat object (e.g.,
screwdriver) along side the relay bottom to pry the band loose.
b Unplug the relay from its socket.