Juniper Networks G10 CMTS manual Remove Power Supplies

Power Supplies

•	If the CMTS is not operating in a power-redundant configuration, a fault with a single
•	power-related component might cause the CMTS to shut down.
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•		If a fault does occur within a non-redundant configuration,
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		we strongly recommended that you immediately switch
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		off the power to the CMTS for safety purposes.
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•	In the case of AC power, you switch off the power by pressing the rocker switch on the AC
•	power transition module to the off (O) position. In the case of DC power, the DC power
•	transition module does not contain a power switch. We recommend that you switch off the
•	DC power before removing the DC power cord from the DC power transition module
•	terminal block. Once the power is switched off, you can safely replace the faulty component.
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•Remove Power Supplies

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•	The power supplies in the G10 CMTS are hot-swappable, which means that the system can
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	remain powered up while a power supply is being removed or installed.
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			Before you hot-swap a power supply, ensure at least five
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•			operating power supplies remain in the chassis after you
•			remove the faulty power supply. Otherwise, power down
•			the CMTS before removing the faulty power supply.
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•	The following procedure describes the steps required for removing a power supply:
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•	1. Remove the power supply faceplate by pulling the flanges on each side of the faceplate
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		away from the chassis until the faceplate ball studs are removed from the power supply
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		faceplate clips.
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•	2. Loosen the upper and lower retainer screws of the power supply.
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•	3.	Press down on the ejector release while simultaneously pulling the ejector away from the
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		power supply (actions #1 and #2 in Figure 44 on page 161). The ejector should rest at

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approximately 45° from the faceplate. The power supply is physically and electrically removed from its connector on the midplane.

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4. Slowly slide the power supply out of its bay until it is fully removed from the system

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(action #3 in Figure 44).

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5. If you are not replacing the power supply, you must install a power supply filler panel to

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cover the empty power supply bay. Align the panel over the bay opening so that the two self-contained screws are on the left side of the panel when installed in the chassis (see Figure 5 on page 12). Apply 3 in-lb of torque to each of the two screws.

160 JUNOSg 3.0 G10 CMTS Hardware Guide