Blown Fuse Indicators; Figure 107: Fuse Locations In The Fuse Box - Juniper Internet Router M160 Hardware Manual

Blown Fuse Indicators

The router uses fuses from the Cooper Bussman brand GMT series for the
FPCs, MCSs, PCGs, and SFMs. They are located in a fuse box on the rear
of the midplane. When the fuse for a component blows, the component
stops functioning even though it is installed correctly and the power
supplies are still providing power to the router.
Figure 107 shows the location in the fuse box of the fuse for each component.
The labels shown in the figure do not appear on the actual fuses (the clear cover
on every fuse reads
below the fuse box displays the same information.

Figure 107: Fuse Locations in the Fuse Box

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A B C D
When a fuse has blown but the power supplies are still delivering power to router,
the amber LED adjacent to the fuse lights. For vertically oriented fuses (in the
groups labeled
for horizontally oriented fuses (in the group labeled
NOTE: The LEDs are each about 0.1" (2 mm) square. They might be difficult
to see when not lit.
Another indication that a fuse has blown is that the colored indicator bulb
inside it becomes visible through the clear cover on the fuse. For information
about the indicator bulb color for each fuse type, see Table 25.
LCD Message
interface-name so- x / x / x SEF
interface-name so- x / x / x UNEQ
BUSS GMT-X
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A B C D A B C D A B C D
through
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Troubleshooting Hardware Components
CLI Message
interface-name so- x / x / x - SONET severely errored
frame
interface-name so- x / x / x - SONET unequipped
), but a table on the surface of the midplane
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in Figure 107), the LED is located below the fuse;
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Overview of Troubleshooting Resources
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FPC2 15A
A
B
FPC1 15A
FPC0 15A
C
PCG0 1A D
), it is to the left of the fuse.
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