Section 8: Maintenance Model 2601B-PULSE System SourceMeter Instrument Reference Manual
8-2 2601B-PULSE-901-01A April 2020
Line fuse replacement
A fuse on the 2601B-PULSE rear panel protects the power line input of the instrument. See the
following instructions to replace the fuse. You do not need to return your instrument for service if the
fuse is damaged.
Disconnect the line cord at the rear panel and remove all test leads connected to the
instrument before replacing a line fuse. Failure to do so could expose the operator to
hazardous voltages that could result in personal injury or death.
To prevent injury, death, or instrument damage, use only the correct fuse type, as shown in
the following table.
250 V, 3.15 A, slow blow 5 ï‚´ 20 mm
To replace the line fuse:
1. Power off the instrument and remove the line cord.
2. The fuse drawer (item 1 in the following figure) is below the AC receptacle. A small tab is on the
top of the fuse drawer (item 2). Use a thin-bladed knife or a screwdriver to pry this tab away from
the AC receptacle.
Figure 126: Fuse replacement
3. Slide the fuse drawer out to gain access to the fuse. The fuse drawer does not pull completely out
of the power module.
4. Snap the fuse out of the drawer and replace it with the same type.
5. Push the fuse drawer back into the module.
If a fuse continues to become damaged, a circuit malfunction exists and must be corrected. Return
the instrument to Keithley Instruments for repair.
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