Juniper JUNOS - NETWORK OPERATION GUIDE REV1 User Manual

Verifying PCG Failure ! 377
Chapter 28: Monitoring the PCG
Step 2: Check the PCG Fuses
Action Check the PCG fuses to check for failure.
The M40e and M160 router fuses are located in a fuse box at the rear of the
midplane, behind the lower rear impeller assembly. You must remove the lower
impeller assembly to access the fuses, as described in the appropriate router
hardware guide.
When the fuse for an PCG blows, the PCG stops functioning even though it is
installed correctly and the power supplies are providing power to the router.
For the M40e and M160 routers, when a fuse has blown but the power supplies are
still delivering power to router, the amber LED adjacent to the fuse lights. See
Figure 155.
Figure 155: M40e and M160 Router Fuses
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 the appropriate router hardware guide.
A blown fuse can cause a component to fail even though it is correctly installed and
the power supplies are functioning. Check for a blown fuse in the following
circumstances:
! The LED that indicates normal operation for the component fails to light.
! The appropriate CLI show chassis environment command indicates that the
component is installed but is not receiving power.
J240
A
B
C
D
J241
ABCD
J244
ABCD
J242
ABCD
J243
ABCD
MCS0 12A
MCS1 12A
SFM0 10A SFM1 10A SFM2 10A
FPC4 15A
FPC2 15A
FPC1 15A
FPC0 15A
PCG0
1A
15A
SFM3 10A
SPARE 1A
SPARE 10A SPARE 12A SPARE 15A
FPC7 15A FPC6 15A FPC5 15A
1238
1A
PCG1
FPC3

Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Specifications

General

Brand	Juniper
Model	JUNOS - NETWORK OPERATION GUIDE REV1
Category	Software
Language	English