IBM 4247 Maintenance Information page 297

If the printer displayed a '02/099 FORMS JAM' message while an operator was performing a Park operation,
advise the operator that the forms perforation must be torn off at the tear bar before confirming the Park
operation. The error occurs when the printer backs up the forms, but does not detect that the paper is back
on the tractor. The printer stops and displays '02/099 FORMS JAM.'
2. Ensure that the bellcrank (the mechanism on the left end of the platen) is working correctly. The bellcrank
raises and lowers the pinch rollers. The paper presence sensor for the rear forms path is mounted on the
pinch roller. The bellcrank mechanism must be functioning correctly for the sensor to operate correctly.
Platen Gear
Bellcrank
Washer
Figure 55. Bellcrank Location. Must be located between platen gear and washer.
Ensure the bellcrank is captured between the washer and the gear. Load forms into the rear forms path and
verify that the pinch rollers raise and lower.
3. Load forms into one of the push tractors. The top of the forms should be near the square drive shaft of the
tractor. Do not push the forms into the printer. This would block the paper presence sensor.
4. Press the Load key. The first form moves into the print area.
Note: If the forms move into the print area, but the top of the forms move past the printhead, and the
'01/001 END OF FORMS' message returns to the display, perform T&D11 The paper presence sensor
in that forms path did not sense the forms.
Chapter 5. Removals and Adjustments
297