IBM 4247 Maintenance Information page 298

5. If it appears you have paper loaded into a path, press the Path key. If an operator panel light changes to a
different path (Model A00) or the Path message (Models 001/002/003) changes to a different path, perform
T&D11 The paper presence sensor in that path does not recognize that forms are present.
6. If your printer displays a '02/099 FORMS JAM' message when a paper load is attempted using the Load key
or under host command, you may have paper already in one of these paths:
v Front
v Rear
v Manual sheet feed
Remove the paper; look for debris or chad.
- or -
7. A shiny platen may be producing a false indication of paper in the rear path.
a. Remove all paper debris from the rear path sensor area.
b. Perform T&D11 to reset the rear path sensor threshold level. This should remove the '02/099' FORMS
JAM message.
Notes:
1) If the printer is using only the front path, the message may return as the platen continues to age and
become more shiny.
2) If the printer is using a rear path, repeat step 3 on page 297 and step 4 on page 297 at the beginning
of this Service Check. If the paper presence sensor does not sense the forms, you must verify the
microcode level of the printer.
3) In cases where you encounter extreme platen wear, you may want to install a new platen, upgrade to
the later microcode module, and run T&D11
c. If the '02/099 FORMS JAM' message is still in the display, verify that the microcode level is at least at the
minimum level shown in the following list. The threshold level set by the earlier microcode might be
creating a false message. The later level of microcode corrects this condition with a different threshold
setting which is less sensitive to the shine of the platen. For this discussion, later microcode begins at
the following controller code levels:
Chapter 5. Removals and Adjustments
298