Lexmark 2030 Color Jetprinter Service Manual - Page 13

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. Diagnostic Information 2-3