Lexmark W820 Service Manual - Page 78

4025-Finisher Step Actions and Questions Yes No 2 SENSOR TEST Go to step 4 Go to step 3 Enter Diagnostics and check the Finisher Input Path Sensor function. Does the Finisher Input Path Sensor test ok? 3 FINISHER INPUT PATH SENSOR Problem Go to step 4 Replace the Finisher Input Path Sensor. Go to "Sensor, Input solved Path Removal" on page 4-41. Enter Diagnostics and check the Finisher Input Path 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? 4 FINISHER MAIN BOARD Problem Replace the Replace the Finisher Main Board. Go to "PWB Assembly- solved MCU Board Main Removal" on page 4-132. Enter Diagnostics and check the Finisher Input Path 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? 5 PATH PAPER INSPECTION Go to step 6 Replace the Inspect the Drive Rolls in the Finisher, especially the Input Rolls and the Registration Rolls. suspect Drive Rolls Are all of the Drive Rolls in the Finisher clean and free of obvious wear and damage? 6 DRIVE TRAIN TEST Go to step 7 Replace the Enter Diagnostics and select Output Bin Tests. Select Feed Test, Output Bin 2 to run the Finisher Main Feed Motor. Finisher Main Feed Motor Does the Finisher Main Feed Motor run smoothly? 7 DRIVE TRAIN INSPECTION Go to step 8 Replace the Inspect the drive train, including belts, pulleys, and gears, of the entire Finisher Assembly from the Finisher Main Feed Motor to the Registration Rolls. suspect belts, pulleys, and gears Does the entire drive train of the Finisher Assembly appear to be in good condition, with no damaged or slipping belts and no chipped or broken pulleys or gears? 8 The following Finisher FRUs and areas are associated with this specific problem. One or more of these FRUs or areas may have failed partially or completely. If you cannot isolate this problem using these steps, replace each FRU or troubleshoot each area listed below, one at a time, until you isolate and solve the problem. • Wiring and connectors linking the FRUs • H-Tra drive train FRUs, including gear, belts, and rolls. 2-18 Service Manual