IBM 4247-003 Maintenance Manual - Page 296

Sensor Service Checks You are here because the printer displayed a '02/002/020/099 FORMS JAM' message, or an unrecoverable '01/001 END OF FORMS' message. Note: If the printer displays a 01/001 END OF FORMS message after you load forms, proceed to "Paper Presence Sensor Check". To determine whether you should investigate the FORMS JAM message as a paper presence sensor condition or a tractor sensor condition, perform this test. While the message is in the display, open and close the printer top cover. v If the carriage moves across the print line and returns, follow the Paper Presence Sensor Check. - or v If the carriage does not move across the print line, follow the Tractor Sensor Check and Adjustment beginning on 300. Paper Presence Sensor Check This Check informs you when to use T&D11 - Pinch Roller/Sensor Tune/Ribbon Feed and Lift Motors. The 3 paper presence sensors are located near the platen in the Front Push, Rear Push, and Manual Sheet Feed paper paths. Before you perform T&D11, follow these steps to verify that you actually need to perform T&D11 Do not perform T&D11 until you are instructed to do so. 1. If the printer displayed a '02/099 FORMS JAM' message during Load or Park operations, determine the cause. Load and Park problems are often customer-use problems. Do not perform T&D11 because of a Load or Park problem. - or If the printer displayed a '02/099 FORMS JAM' message after the operator loaded forms, the forms may have been loaded too far onto the tractor or blocked the paper presence sensor. Thus, when attempting to reload the forms, the sensor has already sensed paper and will display the message. Instruct the customer that when loading forms to install the forms with the top edge of the first form to be near the square drive shaft of the tractor assembly. - or - Chapter 5. Removals and Adjustments 296