Cisco Systems 8600 Series manual Replacing an AC Power Supply, AC Power Supply Assembly

Replacing Parts

Replacing an AC Power Supply

BPX switches are powered by redundant power supplies; either power supply can supply the current requirements of the node. The AC Power Supply is part of an assembly which is replaced as a single unit. Access to the AC Power Supply assembly is from the front, but first, the Air Intake Grille must be removed.

To remove a power supply, proceed as follows:

Step 1 If you haven't already done so, check the status and output voltage of the power supplies at the node using the dspasm command. Note which power supply is failed, A or B. Power supply A is on the right side facing the rear of the node.

Step 2 Remove the Air Intake Grille. Locate the small access hole in the top, center of the Air

Intake Grille.

Step 3 Fully insert a flat-bladed screwdriver (with a 1/4 in. blade) in the access hole.

Step 4 Rotate the screwdriver to release the spring latch holding the Air Intake Grille (see Figure 11-4). The grille should pop out.

Figure 11-4 AC Power Supply Assembly

Power supply plunger hole

Power supply

Plunger

Power supply Retainer

SLOT A

Power supply thumb screw

SLOT B

Slot B empty if non-redundant

thumb screw	captive
	screw

Power supply

retainer H8212

Step 5 Tilt the grille forward approximately a 45 angle, then lift if out and set it aside. This exposes the power supply retainer bracket.

Step 6 With a flat-bladed screwdriver, loosen the retainer bracket hold-down screw in the center of the bracket and tilt the bracket.

Step 7 Identify which power supply needs replacement. Power supply A is the unit on the left, B is on the right. In most cases, the failed unit will be identified by a front panel lamp indication.

Repair and Replacement 11-11