IBM 4247, Maintenance Information

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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