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1. Introduction
1.1 Printer outside features
For the user’s convenience, SMART-21 status can be seen through LED and the printer
can be controlled by LED button. It takes a power via the 24V adaptor provided with the
printer. Using USB and Network port, it is communicated with the user’s PC
The following shows the outside functional features found on the printer.
Figure 1 SMART-21 front features
Figure 2 SMART-21 rear features
⑤ Power switch
⑥ 24V power connector
⑦ USB port
① Top cover open button
② Fan
③ Card slot
④ LED buttons
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