Replacing Hardware Components
WARNING:
You must power off the router before removing or installing a fuse.
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
connect the strap to one of the ESD points on the chassis. Make sure the router
is attached to a proper earth ground. For more information about ESD, see
“Preventing Electrostatic Discharge Damage” on page 226.
2.
Remove the rear lower impeller assembly by loosening the thumbscrew at
each corner of the impeller cover and sliding the impeller assembly out of the
chassis. For complete instructions, see “Removing the Rear Lower Impeller
Assembly” on page 155.
3.
Determine which fuse has blown. The amber LED under the fuse lights and the
indicator bulb becomes visible through the clear cover on the fuse.
4.
Power off the router as described in or “Disconnecting Power from the Router”
on page 200.
5.
Grasp the blown fuse by the edges and rock it in its slot until it comes loose and
disconnects. Rock up and down for a vertically oriented fuse (in the groups
labeled
J241
through
J243
in Figure 106) and side to side for a horizontally
oriented fuse (in the group labeled
J240
). If the cover slips off the fuse, snap
the cover back into place and begin again.
NOTE:
We recommend you use an insulated fuse removal tool to remove fuses.
6.
Remove the appropriate spare fuse from the group of fuses labeled
J244
in
Figure 106. (The labels shown in the figure do not appear on the actual
fuses—the clear cover on every fuse reads
BUSS GMT-X
—but a table on the
midplane below the fuse box displays the same information.) Verify that
the spare has the same rating and color coding as the fuse it is replacing,
as specified in Table 25. To see the indicator bulb and printed rating, look
at the fuse from the side.
7.
For a vertically oriented fuse, orient the replacement fuse over the slot so
that the text on the fuse cover (
BUSS GMT-X
) reads from bottom to top. For a
horizontally oriented fuse, orient the replacement fuse over the slot so that the
text on the fuse cover is upside down.
8.
Press the new fuse into the slot.
9.
Power on the router as described in “Powering On the Router” on page 119.
10.
Verify that the amber LED under the replacement fuse is no longer lit.
Replacing Power System Components
205
Содержание Internet Router M160
Страница 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Страница 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Страница 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Страница 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Страница 26: ...2 Product Overview ...
Страница 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Страница 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Страница 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Страница 82: ...58 Initial Installation ...
Страница 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Страница 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Страница 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Страница 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Страница 244: ...220 Appendixes ...
Страница 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Страница 301: ...Part 5 Index Index 277 ...
Страница 302: ...278 Index ...