Figure 63: Fuses In The Midplane - Juniper M320 Hardware Manual

M320 Router Hardware Guide

Figure 63: Fuses in the Midplane

134
. When the fuse for a component blows, the component stops functioning even
PEM0
though it is installed correctly and the power supplies are providing power to the router.
Figure 63 on page 134 shows the location of the fuses in the rear of the midplane for each
component. (The labels shown in the figure do not appear on the actual fuses—the clear
cover on every fuse reads BUSS GMT-X
Ignore the labels on the midplane.)
When a fuse has blown but the power supplies are still delivering power to the router,
the yellow LED below the fuse lights. The colored indicator bulb inside the fuse becomes
visible through the clear cover on the fuse.
NOTE: The LEDs are each about 0.1in. (2 mm) square. They might be difficult
to see when not lit.
—and might not match the labels on the midplane.
Copyright © 2010, Juniper Networks, Inc.