Lexmark 302 - Manual (Page 85)

5. Press Scroll ↑ or Scroll ↓ until the printer displays
6. Press Enter or Start to print this test. The Ready indicator
comes on and printing begins.
7. Wait for the printer to stop printing and the Ready indicator to go
off.
8. Press Form Feed until you can remove the printout.
The lines numbered 1 through 9 should print as shown on the
sample printout on page 1-64, and the remainder of the printout
should be clear and readable.
OPERATOR PRINT TESTS
Printer Verification
Chapter 1. Setting Up the 4232 Printer Model 302 1-63