User Manual

Table Of Contents
Maintenance
253
Upper Half of ZD421 Ribbon Cartridge Printers
1. Pull the two (2) Release Arms out to release the Ribbon Drive Transport. Go to Accessing the
Printhead of the Ribbon Cartridge Printer on page 29 for more details.
2. Swing the Printhead Actuator Arm up until it touches the printer’s top cover. Hold the Printhead
Actuator Arm in this position for access to the area below the printhead.
3. Spray the Upper Web (Gap) Array Sensor under the Ribbon Drive Transport and the Ribbon Out
Sensor on the underside of the Printhead Actuator Arm with a can of compressed air. If necessary, use
an alcohol moistened swab to break it up. Use a dry swab to remove any residue that may be left from
the first cleaning.
Ribbon Out Sensor
Upper Web (Gap) Array