Make sure the printer is connected with the power and turn it off.
1)Press the “FEED” button and simultaneously turn on the power.
2)Hold on pressing the “FEED” button for about 10 seconds, then the “ERROR: and “PAPER LED” double- flashing at the same time.
3)Wait for the “PAPER LED” on then release the “FEED” button.
Demo video: http://u.pc.cd/pjq7
Now the printer enters the hexadecimal mode. Press FEED button twice, and it will print automatically with “Hexadecimal Dump” on the first line of the paper showing its hexadecimal mode.
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