Lexmark W820 Service Manual - Page 94

4025-Finisher 985 - Error Code Service Check Logic control sensed that the Shift Roller failed. Step Actions and Questions Yes No 1 SENSOR TEST Go to step 3 Go to step 2 Enter Diagnostics and check the Shift Roller HP Sensor function. Insert then remove a sheet of paper into the sensor. Does the Operator Panel LCD change between OP and CL as you insert then remove the paper? 2 SHIFT ROLLER HP SENSOR Problem Go to step 6 Replace the Shift Roller HP Sensor. Go to "No Paper Sensor solved Assembly Removal" on page 4-136. Enter Diagnostics and check the Shift Roller HP Sensor function. Insert then remove a sheet of paper into the sensor. Does the Operator Panel LCD change between OP and CL as you insert then remove the paper? 3 MOTOR TEST Go to step 5 Go to step 4 Enter Diagnostics and select Output Bin Tests. Select Feed Test, Output Bin 2 to feed paper through the Finisher. Does the Shift Motor test ok? 4 SHIFT MOTOR Problem Go to step 6 Replace the Shift Motor. Go to "Motor Assembly-MP2 solved Removal" on page 4-77. Enter Diagnostics and check the Shift Motor function. Does the Shift Motor test ok? 5 DRIVE TRAIN INSPECTION Go to step 6 Replace the Inspect the drive train, including belts, gears, and levers of the entire Shift Roller Assembly. damaged FRUs Does the entire drive train of the Shift Roller assembly appear to be in good condition, with no damaged or slipping gears and no broken levers? 6 FINISHER MAIN BOARD Problem Go to step 7 Replace the Finisher Main Board. Go to "PWB Assembly- solved Main Removal" on page 4-132. Enter Diagnostics and select Output Bin Tests. Select Feed Test, Output Bin 2 to feed paper through the Finisher. Does the Sensor and/or Motor test ok? 7 MCU BOARD Problem Go to step 8 Replace the MCU Board. Refer to the Printer Service Manual. solved Enter Diagnostics and check the Shift Roller HP Sensor and/or Shift Motor function. Does the Sensor and/or Motor test ok? 2-34 Service Manual