Keithley 2520, Service Manual, Page: 71 / 137

Model 2520 Pulsed Laser Diode Test System Service Manual Routine Maintenance 3-3
Perform the following steps to replace the line fuse:
1. Using a small flat-blade screwdriver, carefully release the locking tab that secures
the fuse carrier to the power module.
2. Pull out the fuse carrier, and replace the fuse with the type specified in Table 3-1 .
CAUTION To prevent instrument damage, use only the fuse rating and type spec-
ified in
Table 3-1
.
3. Re-install the fuse carrier, pushing it in firmly until it locks into place.
NOTE If the power line fuse continues to blow, a circuit malfunction exists and must be
corrected. Refer to
“Troubleshooting” on page 4-13 for additional information.
Table 3-1
Power line fuse
Line voltage Fuse rating Keithley part no.
100-240V 1.6A slow blow, 250V, 5
×
20mm FU-106-1.6