Lexmark 4200 Series Service Manual page 28

4413-XXX
FRU
2 Paper Feed Motor
3 Auto Sheet
Feeder Assembly
4 End-of-Forms
Flag and Spring
2-12
Service Manual
Action
A noisy or chattering motor or a motor that fails to
turn, can be caused by:
• An open or short in the motor
• An open or short in the motor driver on the
system board
• A bind in the paper feed mechanism
With the paper feed motor cable CN7
disconnected from the system board, check for
approximately 4 ohms between the following pins
on the motor:
Pin 1 to Pin 4
If the readings are incorrect, replace the paper
feed motor assembly with gears. Go to the
feed motor assembly with gears removal" on
page 4-23.
Although the paper feeds in a forward direction
only, the paper feed motor turns in two directions.
If the paper feed motor turns in one direction only,
replace the system board. Go to the
board removal" on page
Binds in the paper feed motor or gear train can
cause intermittent false paper jam errors. Remove
the paper feed motor and check the shaft for binds.
Also check for a loose or worn motor gear.
Check the pick roller for wear.
Check for binds or damage.
"Paper
"System
4-19.