7 Servicing the Attenuation Control Unit
68 Keysight J7211A/B/C Operating and Service Manual
Maintenance and Adjustments
Fuse removal/replacement
User maintenance is limited to replacement of the rear panel fuse. The main ac line fuse is located
on the rear panel in the line power module.
Please ensure that the fuse is 250V, T3.15A.
Use the following procedure to replace fuse.
1 Remove fuse holder using a tweezer.
2 You will see two fuses - the one on the left is the active fuse and the other is backup.
Figure 7-2 Fuse removal/replacement
3 Remove fuse and replace with one of the correct rating and type for your selected input ac line
voltage.
Adjustment
The J7211A/B/C attenuation control unit has no internal electrical or mechanical adjustments.
Be sure to select the correct fuse rating for the selected line voltage. Do not use repaired fuses or
short circuited fuse-holders. To do so could cause a shock or fire hazard.
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