IBM Personal Computer Manual To Operations page 200

S
Perform the printer self-test:
1. Open the access cover and set all DIP
switches to Off.
2.
Close the access cover.
~
3. Set the printer's Power switch to On.
4.
Press the Ready button to set the printer to
the Not Ready state (Ready light is ofO.
5.
Press the Test Mode button.
6. To stop the test, press the Test Mode button
again.
8020-2 Test
April 1984