IBM 8265 Nways ATM Switch, Руководство по установке

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Replacing a -48 Volt DC Power Supply Cable
CAUTION:
Only trained electrical service personnel must make disconnections to the -48 Volt DC power
source.
Follow these steps when replacing a -48 Volt DC power cord:
1. If installed, remove the power supply bay grille to gain access to the power supply bay.
2. Set the power supply ON/STANDBY switch to the STANDBY (O) position.
3. Turn off the power source circuit breaker, protecting the power supply whose cable you are replacing.
4. Unplug and remove the keyed cable connector from the power supply socket.
5. Disconnect the 2 red wires from the -48 Volts (- symbol).
6. Disconnect the 2 black wires from the 0 Volt (zero Volt) return (+ symbol).
7. Disconnect the cable ground wire from the terminal ground lugs.
8. Remove the cable.
9. Prepare a new cable as described in “Preparing and Installing the DC Input Power Cords” on
page 23.
10. Plug the keyed-connector into the power supply socket.
11. Set the power supply's ON/STANDBY switch to the ON (I) position.
12. Turn on the power source circuit breaker.
Appendix B. Maintenance
65