i. With the printer power turned off, while pressing the Resume/Cancel button, press and hold the Power button. (DO NOT release the buttons).
ii. When the Power LED lights in green, while holding the Power button, release the Resume/Cancel button. (DO NOT release the Power button.)
iii. While holding the Power button, press the Resume/Cancel button 2 times, and then release both the Power and Resume/Cancel buttons. (Each time the Resume/Cancel button is pressed, the Alarm and Power LEDs light alternately, Alarm in orange and Power in green,
starting with Alarm LED.)
iv. When the Power LED lights in greens, the printer is ready for the service mode operation: