OS Upgrade instructions

Upgrade files are in the attachments, after unzipping, appear a file called “ios.nb0”

1. Copy the file “ios.nb0”to SD card root directory.

2. Insert the SD card into the machine SD card booth, press the power switch to turn on the machine and access to the main interface, then press “MENU” button, will prompt input password, the password is 123452.  Enter the “Factory Setting”. Press “▼” button an select “Update OS” option , shown as below

3. After finish upgrade, the screen display, shown as below

4. Then, press OK button to quit the OS upgrade, finally press ESC button to quit the Factory Setting.power off and power on. System Version is AP: 7.6_OS:2.3 express OS upgrade is successful.