iDP-3420 /3421/3423 User’s Manual
31 CITIZEN
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1. Open the printer cover.
2. Remove the paper roll by cutting it halfway or pushing the paper free lever in the arrow-
indicated direction.
3. Detach the winding reel.
4. Pull out a flange from one side of the winding reel.
5. Pull out the paper roll from the winding reel.
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1. Close the printer cover.
2. Loosen a sensor fixing screw.
3. Slide the sensor unit up/down and tighten the fixing screw at an adequate position.
Sensor Position versus Paper Remaining Amount
The following table shows a paper remaining amount depending on the remaining amount
mark position on the sensor unit. (When the specified paper roll is used)
Mark Position Paper Roll Remaining
Diameter Paper Roll Remaining
Amount
1Approx. f21 mm Approx. 1.2 m
2Approx. f23 mm Approx. 2.2 m
3Approx. f25 mm Approx. 3.2 m
Flange
Winding Reel
Paper Roll (R eceipt Pape r)
Remaining Amount Marks
Sensor Fixing Screw
Sensor Unit