Lexmark 2030, Service Manual

Page: 13 / 51

Diagnostic Information 2-3
4091-001
Service Checks
Carrier Transport Service Check
FRU Action
1 System Board Unplug the printer and disconnect CN6 from the
system board. Plug in the printer and check for a
pulse of (approximately) 10 V dc between
CN6-1and ground, on the system board. If the
voltage is not present, check for motor pins
shorted to the motor housing. If you find a pin
shorted to the housing, replace the motor. If the
failure remains, replace the system board.
2 Carrier Transport
Motor 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
disconnected from the system board, check for
zero to ten (0 - 10) ohms between the following
pins on the motor:
CN6-1 and CN6-2
CN6-3 and CN6-4
If the readings are incorrect, replace the motor.
3 Carrier Guide Rod Clean the carrier rod.
Note: Lubricate the rod and the carrier rod bearing
surfaces with grease P/N 1329301.
4 Carrier Transport
Belt
Idler Pulley Parts
Carrier Frame Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement.
Carrier to carrier frame engagement should be
lubricated with grease P/N 1329301.
6 Home Position
Sensor Unplug the printer and disconnect CN5 from the
system board. Plug in the printer and check for
5 V dc between CN5-3 and ground, at the system
board. If the voltage is present, replace the home
position sensor. If the voltage is not present,
replace the system board.