Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual page 104

4520-xxx
Excessive Noise or Vibration
FRU
1 DC Motor Assembly
2 Idler Pulley
DC Motor Assembly
3 Drive Pulley
4 Motor Drive Belt
Tray Drive Belt
2-76
Service Manual
Action
Check to make sure all the motor
plate mounting screws are tight.
Check to make sure the idler pulley
is not binding on the pulley shaft.
Check the pulley for any signs of
wear. Check the idler pulley shaft on
the motor mounting plate for any
signs of damage or contamination.
Check the drive pulley for any signs
of wear, binds or damage to the
pulley or pulley shaft. Make sure the
pulley turns freely on the pulley
shaft.
Check the DC motor drive belt for
any signs of damage. Check to make
sure the belt is tracking correctly on
the drive pulley, idler pulley and
motor pulley. Check the tray drive
belt for any signs of damage. Check
to make sure the belt is tracking
correctly on the lower section of the
drive pulley and lead screw pulleys.