Compuprint 3056 Operator's Manual page 22

4. Insert a cut sheet paper between the left and right edge guides until it meets
resistance. About 1 second later, paper will be loaded automatically and the
self test printing will begin.
5. Press the Ready button to pause the self test printing. Press the button again
to resume the printing.
6. To end the self test, press the Ready button to pause printing, then eject or
tear off the printed page(s) and turn off the printer.
The sample of self test is listed below:
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