Juniper Networks G10 CMTS manual Front Fan Trays

Fan Trays

Front Fan Trays		•
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To replace a front fan tray, follow this procedure (see Figure 45 on page 164).		•
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1.	Remove the air intake faceplate by pulling the flanges on each side of the faceplate away	•
	from the chassis until the faceplate ball studs are removed from the air intake faceplate	•
	clips.	•
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2.	Each fan tray is held into place by a front fan tray retainer that resides on hinges. The	•
	retainer contains a spring-loaded plunger that mates with the chassis when the retainer	•
	is locked into position. To unlock the retainer, pull down on its plunger and swing it away	•
	from the chassis until it comes to rest.	•
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3.	Grab the fan tray directly underneath the flange that houses its LED and slowly pull the	•
	tray out of its bay until it is fully removed from the system. Figure 45 shows a populated	•
	and an empty front fan tray bay in the chassis (the front fan tray retainer is not shown in	•
	the empty bay and the air intake faceplate clips are not shown in either bay).	•
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4.	Align the edges of the fan tray replacement within the chassis fan tray rails. Ensure that	•
	the fan tray edges are not seated above or below the rails, but are within the rails.	•
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5.	Slowly slide the fan tray completely into its bay until its power connector mates with its	•
	corresponding midplane power connector. You should be able to see and hear the fans	•
	operating within the tray.	•
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6.	You must return the front fan tray retainer to its locked position by pulling down on its	•
	plunger, swinging the retainer toward the chassis, and releasing its plunger so that it	•
	mates with the chassis. If the plunger cannot mate with the chassis, the fan tray is not	•
	fully installed into its bay.	•
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7.	Replace the air intake faceplate by aligning its four ball studs with the four air intake	•
	faceplate clips and pressing the faceplate towards the chassis until it snaps into place.	•
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Rear Fan Tray		•
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To replace a rear fan tray, follow this procedure (see Figure 46 on page 165).		•
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1.	Loosen the eight self-contained screws that fasten the rear fan tray to the chassis.	•
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2.	Grasp the handles on each side of the fan tray and slowly pull the tray out of its bay until	•
	it is fully removed from the system.	•
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3.	Align the fan tray replacement within the chassis. The rear fan tray flanges in the chassis	•
	assure proper alignment within the bay.	•
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4.	Slowly slide the fan tray completely into its bay until its power connector mates with its	•
	corresponding midplane power connector. You should be able to see and hear the fans	•
	operating within the tray.	•
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5.	Manually fasten the eight self-contained screws of the rear fan tray to the chassis, then	•
	apply 4 in-lb of torque to each of the eight screws.	•
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Replacement Procedures 163