3-2 Routine Maintenance Model 2750 Multimeter/Switch System Service Manual
Introduction
The information in this section deals with routine type maintenance and includes proce-
dures for setting the line voltage, replacing the Model 2750 line and front terminal AMPS
fuses, and replacing the amps fuses for the Models 7700 plug-in module. Replacement of
the Model 2750 non-volatile RAM battery and reading module relay card closure count is
also covered.
Setting the line voltage and replacing the line fuse
WARNING Disconnect the line cord at the rear panel, and remove all test leads con-
nected to the instrument (front and rear) before replacing the line fuse.
The power line fuse is located in the power module next to the AC power receptacle
(Figure 3-1). If the line voltage must be changed, or if the line fuse requires replacement,
perform the following steps:
1. Place the tip of a flat-blade screwdriver into the power module by the fuse holder
assembly (Figure 3-1). Gently push in and to the left. Release pressure on the
assembly, and its internal spring will push it out of the power module.
CAUTION For continued protection against fire or instrument damage, replace the
fuse only with the type and rating listed. If the instrument repeatedly blows
fuses, locate and correct the cause of the trouble before replacing the fuse.
2. Remove the fuse, and replace it with the type listed in Table 3-1.
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