Introduction
The information in this section deals with routine type maintenance that can be performed by
the operator. This information is arranged as follows:
• Setting line voltage and replacing fuse — Explains how to select the alternate power line
voltage setting, and how to replace a blown power line fuse.
• Amps fuse replacement — Explains how to replace a blown current fuse.
Setting line voltage and replacing fuse
A rear panel fuse located next to the AC receptacle (in the power module) protects the power
line input of the instrument. If the line voltage setting needs to be changed or the line fuse needs
to be replaced, perform the following steps.
WARNING Disconnect the line cord at the rear panel and remove all test leads connected to the instru-
ment (front and rear) before replacing the line fuse or changing the line voltage setting.
1. Place the tip of a flat-blade screwdriver into the power module by the fuse holder assem-
bly (see Figure 1-1). Gently push in and to the left. Release pressure on the assembly and
its internal spring will push it out of the power module.
2. Remove the fuse and replace it with the type listed in Table 1-1.
CAUTION For continued protection against fire or instrument damage, only replace
fuse with the type and rating listed. If the instrument repeatedly blows fuses,
locate and correct the cause of the trouble before replacing the fuse.
3. If configuring the instrument for a different line voltage, remove the line voltage selector
from the assembly and rotate it to the proper position. When the selector is installed into
the fuse holder assembly, the correct line voltage appears inverted in the window.
4. Install the fuse holder assembly into the power module by pushing it in until it locks in
place.
1-2 Routine Maintenance
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