Lexmark X6170 4408-K01 Service Manual page 27

4408-XXX
FRU
2 Paper Feed Motor
3 Auto Sheet
Feeder Assembly
4 Mid Frame
Assembly
5 End-of-Forms
Flag and Spring
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 JP5 disconnected
from the system board, check for approximately 5
ohms between the following pins on the motor:
1 and 2
3 and 4
If the readings are incorrect, replace the print
engine. Go to the
page 4-12.
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 the following for wear:
• Small Feed rollers
• Large Feed roller
• Exit roller
• Star rollers
If the mid frame assembly needs to be replaced,
go to the "Print engine removal" on page 4-12
and replace print engine.
Check for binds or damage.
"Print engine removal" on
4-15.
Diagnostic information
"System
2-11