how to print self-test page:
Method A:
As picture shows below,these three model printers have been
designed a "TEST" button to get self-test page, when user wants to
printer a self-test page, then press this button for 2 seconds after loading
paper.
Method B:
Send hex command: 1D 28 41 02 00 00 02 via printer communication
ports.
Sample " self-test page", as below
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