Lexmark WinWriter 150c Service Manual - Page 26

4077-001 Transport Service Check FRU Action 1 Transport Motor 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 2 and 3 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. 2 System Board Turn the printer off and disconnect J6 from the system board. Turn the printer on and check for a pulse of 6 to 8 V dc between J6-2 and ground and between J6-3 and ground on the system board as the machine goes through POST. 3 Carrier Guide Rod Clean the carrier rod. Note: Do not lubricate the rod or the carrier rod bearing surface. 4 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. 5 Encoder Strip Check for wear and dirt. 6 Printhead Cable 7 Encoder Strip Printhead Cable Encoder Card System Board 8 Maintenance Station Be sure connector J4 is fully seated. Check the cable for damage. Perform the "Encoder Sensor Test" on page 21. 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