Digi 90031300 manual Power Supply Removal

Power Supply Removal

There are two ways to check a power supply failure:

∙Use QuickManager

∙Check the LED on the power supply’s printed circuit board. An unlit LED indicates that the power supply has failed.

∙ Wear a grounding strap while performing the following procedure to prevent electrical discharge.

∙Avoid touching the fan during the following procedure since the fan blade could cause harm.

1.If dual power supplies are installed in the unit, determine which power supply is malfunctioning. Because dual power supplies feature a load redundant hot swap scheme, the malfunctioning power supply can be removed without powering down the unit.

If the T1 Modem Bank has only one power supply installed, use the ON/OFF switch at the back of the T1 Modem Bank to power-down before removing the power supply.

2.Loosen the two captive screws on the display panel faceplate; carefully pull down the hinged display panel faceplate to access the power supply (or supplies).

When handling the power supply printed circuit board, do not touch the edge connector that connects to the distribution board because damage to the board may result.

3.Pull out the malfunctioning power supply from the chassis.

4.See “T1 Modem Bank Power Supply Installation/Replacement” on page 8 for instructions on installing/replacing a power supply.

Component Removal and Installation 73