Seagate ST31230N/ND Guia de Instalação descarregar pdf (Página 236)

16-4 Hardware maintenance

Removing and replacing the power supply

Standard 1.0 Option 11 EC Installation and Maintenance Guide November 1999

Removing and replacing the power supply

Introduction

The power for the EC 11 is provided by an AC power supply.

The power supply consists of an AC-to-DC board with

external optional backup batteries floating across the output

of the board and a DC-to-DC board. To turn off all power to

the EC 11, switch the breaker on the front of the power

supply to the OFF position, marked “0.” Do not attempt to

power down the EC 11 by pulling the AC plug. To power up

the system again, switch the breaker on the power supply to

the ON position marked “1.”

The output from the power supply is +5 V and +/- 12 V DC to

the EC 11 PCPs and disk drives.

Replacing the power

supply

To replace the power supply, follow these steps.

Step Action

1 Courtesy down the system if operating.

2 Shut off power to the EC 11 by switching the breaker

on the power supply to the off (0) position.

3 Remove the AC power cord and DC battery

connection from the bottom of the power supply.

4 Unlatch and pull out the power supply.

5 Ensure that the breaker on the replacement power

supply is in the off (0) position.

6 Insert the replacement power supply, ensuring that

the rear connector is aligned with the backplane

connector, and latch it in place.

7 Connect the AC cord and the DC battery connection

to the bottom of the replacement power supply.

8 Apply power to the EC 11 by switching the breaker

on the power supply to the on (1) position.

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Seagate ST31230N/ND Guia de Instalação Página 236