IBM 6400 Maintenance Information Manual page 127

Symptom
TOF is lost repeatedly
Table 5. General Symptom List
1. Check that the customer is setting the forms length to match the
size paper used. Set the forms length to match the length of
paper being used.
2. If the customer is using multi-part forms, check that the forms
thickness lever is not being set too tightly. Set the forms
thickness lever to match the thickness of paper and provide
satisfactory print quality, but not too tightly.
3. Check the paper feed motor pulley for looseness. Make sure the
correct pulley is being used: it should have 25 teeth. Hold the
collar snug against the motor pulley and torque the 7/64 inch
setscrew to 25 ± 2 inch-pounds (2.82 ± 0.23 N•m). Replace the
paper feed pulley if it does not have 25 teeth.
4. Check and adjust the paper feed timing belt. Replace the belt if it
is damaged.
5. Remove the paper guide assembly or pedestal top cover. Make
sure connector P107/PAPR M is fully seated in connector J107
on the CMX controller board. Connect P107/PAPR M to J107 on
the CMX controller board.
6. Power on the printer. Load paper and set TOF. Press Form
Feed and View several times and check that paper returns to
TOF. Replace the paper feed motor if paper does not return to
TOF.
7. Power on the printer. Press Form Feed and View several times
and check that paper returns to TOF. Replace the CMX
controller board if paper does not return to TOF.
General Symptom List
Corrective Action
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