Lexmark 4200 Series Service Manual page 23

4413-XXX
FRU
2 Carrier Transport
Motor
3 Carrier Guide Rod
4 Encoder Strip
Carrier Assembly
with Belt
5 Carrier Transport
Belt
Idler Pulley
Assembly
Action
Check the motor for binds, or loose motor pulley.
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 carrier transport
mechanism
With the carrier transport motor cable (CN3)
disconnected from the system board, check for 0
to 16 ohms between the following pins on the
motor:
CN3-2 and CN3-3
If the readings are incorrect, replace the print
engine. Go to the
page 4-16.
Clean the carrier rod.
Note: Lubricate the rod and the carrier rod bearing
surfaces with grease P/N 99A0394.
Check the encoder strip for proper installation.
Also, check it for wear, dirt, and grease. Replace if
needed.
Be sure all printhead connectors are fully seated.
Check the cables for damage.
If the encoder strip and all connections are okay,
but the carrier still slams the side frame, replace
the carrier assembly with belt. Go to the
assembly with belt removal" on page
problem remains, replace the system board. Go to
the "System board removal" on page
Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement. If pulley
assembly is damaged, replace.
Lubricate carrier to carrier frame engagement with
grease P/N 99A0394.
"Print engine removal" on
Diagnostic information
"Carrier
4-18. If
4-19.
2-7