whats is a printer code page?

The Thermal Printer code page is for different languages,  HSPOS Printer Supports 26 different code pages, it can use the print setting tools to set the different Languages, Also the printer self-test page also Show the current Codepage.  If you want to set the codepage, you can see "How to change the codepage for Thermal Printer"

How to print a self-test page,  power off the printer. keep press the feed key and power on sametime, the printer will print self-test page.

If the printer not set the right codepage, the printer will be print the garbled.