Unisys E-@CTION EFP9800 - Manual (Page 37)

Operating the Printer
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Replacing the Printhead
The impact printhead is extremely reliable. However, it may need to be changed
depending on the use of the printer. Printhead replacement is required if it is
tearing or fraying the ribbon, or if some dots print lighter than others. Call a
service representative for printhead replacement.
Adjusting the Paper Low Sensor
Before adjusting the paper low sensor, make sure the power is off. Place the
printer on a level surface or adjust it while mounted on the host computer. Do
not apply pressure to the top of the printer while making adjustments.