HP 8753E Service Manual page 524

Line Fuse
Tools Required
small slot screwdriver
n
Removal
For continued protection against fire hazard, replace fuse
Warning
only with same type and rating (3 A 250 VAC). The use of
1. Disconnect the power cord.
2. Use a small slot screwdriver to pry open the fuse holder.
3.
Replace the failed fuse with a 3 AF 250 V F fuse. See "Hardware,
Preregulator" in Chapter 13 to find the part number.
Replacement
1. Simply replace the fuse holder.
144 Assembly Replaoement and Post-Repair Procedures