IBM 6400 Maintenance Information Manual page 111

Symptom
CLEAR JAM message
will not clear and paper
does not move
CLEAR JAM message
will not clear but paper
moves
Table 5. General Symptom List
1. 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.
2. Check the paper feed motor pulley for looseness. 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).
3. Check and adjust the paper feed timing belt. Replace the belt if it
is damaged.
4. Power on the printer. Load paper. Press Form Feed and View
several times and check that paper moves correctly in both
directions. Replace the paper feed motor if the message
appears or the paper moves erratically.
5. Power on the printer. Press Form Feed and View several times
and check that paper moves correctly in both directions.
Replace the CMX controller board if the message appears or the
paper moves erratically. Record the message and return it with
the defective board.
1. Power off the printer. Remove the paper guide assembly or
pedestal top cover. Check that connector P106/PMD is fully
seated in connector J106 on the CMX controller board.
2. Remove the barrier shield (cabinet model) or the barrier shield
and paper guide (pedestal model). Check that the paper
detector switch assembly is securely mounted in its bracket.
3. Check that the paper detector switch assembly is securely
mounted to the mechanism base. Tighten the two screws
securing the paper detector switch assembly to the mechanism
base.
4. Check that the motion detector wheel rotates. Replace the paper
detector switch assembly if the wheel does not rotate.
5. Power on the printer. Load paper. Replace the paper detector
switch assembly if the message appears.
6. Power on the printer. Load paper. Replace the CMX controller
board if the message appears. Record the message and return it
with the defective board.
General Symptom List
Corrective Action
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