Disassembly and Repair 5
Keysight U3402A User’s and Service Guide 93
To Replace the Power Line Fuse
The power line fuse is located within the multimeter’s fuse-holder assembly
on the rear panel. The multimeter is shipped from the factory with a power-line
fuse installed (according to country of destination). Refer to Table 5-1. If you
determine that the fuse is faulty, replace it with one of the same size and rating.
Table 5-1 Type of supplied fuse (according to country of destination)
Type of fuse (time-lag, low breaking fuse) Input line voltage Part number
0.25A, 250V, 5x20 mm 100 V to 120 V A02-62-25592-3U
0.125A, 250V, 5x20 mm 220 V to 240 V A02-62-25648-1U
1 Disconnect the power cord. Depress tab 1 and
2 and pull the fuse holder from rear panel.
2 Remove the line voltage selector from
fuse holder assembly.
3 Rotate the line voltage selector and
reinstall it back, so that the correct voltage
appears in the fuse holder window.
4 Replace fuse holder assembly in rear
panel.
1
2
100, 120, 220 (230), or 240 Vac
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