This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
The 'LQ Alignment Test With printer OFF, press Select, Line Feed, Form Feed. Hold them pressed, turn ON printer, and release buttons after printer head starts to move. The printout shows four possible switch settings with six lines of vertical bar printouts for each setting. Settings are indicated like this: 1 0 0 (which means DOWN UP UP). An asterisk by a setting means it is the current setting. Set the switches to the setting which best lines up the vertical bars in the printout. ---------------------------
 
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