IBM 6400-I15 Maintenance Manual - Page 175

Adjusting the End of Forms Distance This procedure tests and sets the distance from the page perforation at which an END OF FORMS fault message is triggered. This adjustment prevents printing on the platen when the printer runs out of paper. The measurement units are dot rows. You will use the dot row patterns printed by the END OF FORMS ADJUST self-test to verify that this parameter is set correctly. NOTE: Do this procedure only if a new paper detector switch assembly has been installed, or if you are sure that the end of forms adjustment is incorrect. An END OF FORMS triggering distance of 1 or 2 dot rows from the perforation is acceptable; 5 to 7 dot rows off indicates adjustment is required. Also, although it is not required, it is advisable to test the End of Forms distance with 6-part paper, in order to verify correct printing with multi-part forms. The procedure below describes how to run the END OF FORMS ADJUST printer test and modify the END OF FORMS ADJUSTMENT VALUE. 1. Power on the printer. 2. Load paper and set the top of form. Make sure the forms thickness lever is closed. Open the cabinet front door. 3. On the sheet of paper just below the paper entrance slot, tear a four-inch square on the left side, immediately below the perforation. (See Figure 29.) This creates a hole that will trigger an END OF FORMS condition, but allows printing to the right of the hole (which would normally be on the platen). 4. Tear a four inch square in the manner described above, on every third sheet, until you have made 3 or 4 holes. 5. If the printer is in READY mode, press Stop to put it into NOT READY mode. 6. Press Scroll" + Scroll# to unlock the Enter key. 7. Press Scroll" + Scroll# + Return + Enter to enter the CE Tests menu. (Press all four keys at the same time.) Adjustment Procedures 175