Keysight E3630A, Operating And Service Manual

Page: 59 / 71

Service Information 5
Keysight E3630A Operating and Service Manual 59
Troubleshooting
Before attempting to troubleshoot the power supply, ensure that the fault is with
the supply and not with an associated piece of equipment. You can determine this
without removing the covers from the power supply by using the appropriate
portions of the Performance Tests paragraph.
Open fuse troubleshooting
Although transients or fatigue can cause a fuse to blow, it is a good idea to
inspect the unit for obvious shorts such as damaged wiring, charred components,
or extraneous metal parts or wire clippings in contact with circuit board
conductors before replacing the fuse. The rating of the correct replacement fuse
depends on the line voltage option of the instrument: for Option OE3, use a
slow-blow 1.0-amp fuse and standard and Option OE9, use a slow-blow 1.6-amp
fuse.
CAUTION
Before applying power to the supply, make certain that its line voltage
selector switch (S2) is set for the line voltage to be used.