Card Cover Unit; Back Panel Unit - SATO DR300 Quick Manual

DR300 Quick Guide
Cleaning method for printer parts
Cleaning for pitch sensor unit.
Pull out pitch sensor guide unit and clean its bottom portion.
If a label is stuck, remove pitch sensor guide unit from the shaft
groove by pulling the stopper in the arrow direction, pull it out and
clean its bottom area.
DR300 Quick Guide
Pg 24

Card Cover Unit

PC Card Slots
PC cards slots for memory card

Back Panel Unit

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Pg 9