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Method 1:
1. Copy the firmware into the blank U disk.
2. Plug in the U disk into the USB port of printer and wait for the copy process finished.
Close the printer power when the copy is finished.
3. Plug out the U disk, then open the printer power and wait for the upgrade finished.
4. After the upgrade completed, please delete the firmware in the U disk to avoid upgrading
repeatedly next time.
Method 2:
1. Connect the wifi successfully.
2. Tap [Settings]-[Upgrade], check the latest firmware; Just tap upgrade online.
Firmware Upgrade
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