Lexmark 7000 Color Jetprinter Service Manual - Page 28

4092-001 Transport Service Check FRU Action 1 Transport Motor Check the motor for binds, or loose motor pulley. Disconnect the transport motor (J4) from the system board. Check for 8 to 18 ohms between pins 1 and 2 on the motor cable. If the reading is incorrect, replace the motor. 2 System Board 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. Turn the printer off and disconnect J4 from the system board. Turn the printer on and check for a pulse of 6 to 8 V dc between J4-1 and ground as the printer goes through POST. 3 Carrier Guide Rod Clean the carrier rod. 4 Transport Belt Idler Pulley Parts Carrier Frame Note: Lubricate the rod and the carrier rod bearing surface. 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. 5 Encoder Strip 6 Printhead Cable Check for wear and dirt. Be sure all connectors are fully seated. Check the cables for damage. Encoder Strip Encoder Card System Board 7 Maintenance Station Perform the "Encoder Sensor Test" on page 3-2. If you cannot enter the test, replace the system board. A problem with the maintenance station can cause carrier movement problems at the right margin. Go to the "Maintenance Station Service Check" on page 2-7. 2-15