Oki LD670 Guía De Usuario página 81

The printer stops after printing the selection items.
- When you press the FEED switch briefly (one second or less), the printer
ends test printing.
- When you press and hold down the FEED switch for one second or longer,
the printer continues test printing to print a list of fonts. To terminate
printing of the font list in progress, press the FEED switch. The printer
cuts the paper and terminates printing of the font list.
Sample test printout
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