Appendix A Changing A Fuse - ZyXEL Communications MGS-3712/MES-3728 User Manual

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P P E N D I X
This appendix shows you how to remove and install fuses for the Switch.
If you use a fuse other than an included fuse, make sure it
matches the fuse specifications in the chapter on product
specifications.
Removing a Fuse
Disconnect all power from the Switch before you begin this
procedure.
Remove the power cord from the Switch.
1
See the product specifications for the location of the fuse. Use a small flat-head
2
screwdriver to carefully pry out the fuse housing.
A burnt-out fuse is blackened, darkened or cloudy inside its glass casing. A
3
working fuse has a completely clear glass casing. Pull gently, but firmly, to remove
the burnt out fuse from the fuse housing. Dispose of the burnt-out fuse properly.
Installing a Fuse
The Switch is shipped from the factory with one spare fuse included in a box-like
1
section of the fuse housing. Push the middle part of the box-like section to access
the spare fuse. Put another spare fuse in its place in order to always have one on
hand.
Push the replacement fuse into the fuse housing until you hear a click.
2
Push the fuse housing back into the Switch until you hear a click.
3
Plug the power cord back into the unit.
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MES-3728 User's Guide
Changing a Fuse
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