Brother mp-21c/cdx - Manual (Page 36)

CHAPTER 3 CONTROL PANEL
3-3
Buttons
The (On/Off) Button (Retry)
When you press this button and the (On/Off) LED comes on, the
printer becomes ready to operate.
When you press this button and the (On/Off) LED goes off, the
printer is turned off.
When the (Alarm) LED is on and the (On/Off) LED is off,
pressing this button will resume printing and the mis-feed will be cleared.
Make sure that the
(On/Off) LED comes on after you press this
button.
Clean Button
When you want to clean the print head, press this button.
Warning
Even if you turn the (On/Off) button off, power is not completely
shut off. In case of emergencies, you must remove the Printer
Interface Card from the computer and remove the AC Adapter from
the mains if connected (MP-21CDX or PA-21MP users only) in order
to shut off power completely.