Paper Feed Service Checks - Lexmark 4500-00 Series Service Manual

Paper feed service checks

Paper jam error indication during POST
FRU
Exit sensor flag
Input paper feed sensor
(registration sensor)
Paper picks during POST and/or continuously
FRU
Paper feed clutch assembly
Action
If the exit sensor flag is not resting
within the paper exit sensor during
POST, the printer displays a paper
jam message. Make sure the flag is
operating freely and correctly
installed.
Make sure the input paper feed
sensor is working properly. A stuck
or incorrectly installed sensor
causes this error.
Action
Check the pick roller clutch for wear.
The solenoid interacts with the
clutch controlling motion of the pick
roller.
If the cam surface of the pick roller
clutch assembly is worn, the
solenoid may not stop the pick roller
from rotating. Replace the paper
feed clutch assembly if necessary.
Make sure the spring on the solenoid
is properly installed. If the spring is
improperly installed or missing, the
pick roller will continuously pick
paper.
Diagnostic information
4500
2-81