Citizen iDP-3535 User Manual page 10

(9) Printer Cover
(10) Manual Paper Feed Knob
(11) Rear Cover
(12) Stacker Basket for fan-fold paper.
(13) Cash Drawer Connector
CITIZEN
Open when replacing the cassette ribbon and paper.
Use to adjust the paper position (available only on pin tractor paper feeding model).
Cover for roll paper.
This connector is used to drive cash drawers. (Ref.7-4)
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iDP-3535 User's Manual