Replacing
the Line Fuse
The value of the line fuse used in the 681XXB is de-
termined by the line voltage selection—a 5A line
fuse for 110 Vac line voltage; a 2.5A line fuse for
220 Vac line voltage. These line fuse values are
printed on the rear panel next to the fuse holder.
Step 1
Disconnect the 681XXB from the power
source.
Step 2
Using a small flat-blade screwdriver, turn
the fuse cap counter-clockwise and remove
the fuse holder.
Step 3
Replace the fuse in the fuse holder.
Step 4
Install the fuse holder in the rear panel.
Using the screwdriver, rotate the fuse cap
clockwise to secure the fuse holder in
place.
Step 5
Reconnect the sweep generator to the
power source.
OPERATOR
ROUTINE
MAINTENANCE
MAINTENANCE
6-14
681XXB OM
Changed: November 1995
Before changing the fuse, always remove the power cord
from the power outlet. There is the risk of receiving a fatal
electric shock if the fuse is replaced with the power cord con-
nected.
Always use a new fuse of the type and rating specified by
the fuse markings on the rear panel of the instrument.
WARNING
