Lexmark WinWriter 100 Service Manual - Page 28

4076-0WJ Transport Service Check FRU OR PROCEDURE 1 Transport Motor 2 System Board 3 Carrier Rod 4 Transport Belt Carrier Guide or Rod Idler Pulley Parts Cable Clip 5 Encoder Strip 6 Print Head Cable 7 Encoder Strip Print Head Cable System Board 8 Maintenance Station ACTION Check the motor for binds, or loose motor pulley. Disconnect the transport motor (J6) 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. 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 J6 from the system board. Turn the printer on and check for a pulse of 3 to 5 V dc between J6-1 and ground and between J6-2and ground on the system board as the machine goes through POST. Clean the carrier rod. Note: Do not lubricate the rod or the carrier rod bearings. Check for worn, loose or broken parts. Check for obstructions blocking carrier movement. Check for wear and dirt. Be sure connector J1 is fully seated. Check the cable for damage. Perform the "Encoder Sensor Test" on page 19. 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 9. 17