Lexmark W820 Service Manual - Page 101

4025-Finisher Step Actions and Questions Yes 9 FINISHER MAIN BOARD Problem Replace the Finisher Main Board. Go to "PWB Assembly- solved Main Removal" on page 4-132. Check the Stapler function. Does the Stapler function correctly? 10 MCU BOARD Problem Replace the MCU Board. Refer to the Printer Service Manual. solved Check the Stapler function. Does the Stapler function correctly? 991 - Error Code Service Check Logic control sensed that there is a problem with the Stapler Rear Position Sensor. No Go to step 10 Step Actions and Questions Yes No 1 SENSOR TEST Go to step 3 Go to step 2 Enter Diagnostics and check the Stapler Rear 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 STAPLER REAR SENSOR Problem Go to step 7 Replace the Stapler Rear Sensor. Go to "No Paper Sensor solved Assembly Removal" on page 4-136. 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 TRAVERSE MOTOR TEST From the Finishing Menu, select the following: Copies 5, Staple ON, Staple Dual Does the Stapler Traverse Motor test ok? Go to step 4 Go to step 6 4 STAPLER BASE INSPECTION From the Finishing Menu, select the following: Copies 5, Staple ON, Staple Dual Does the Stapler Base move freely back and forth? Go to step 7 Go to step 5 5 STAPLER ASSEMBLY Problem Go to step 9 Replace the Stapler Assembly. Go to "Stapler I Assembly solved Removal" on page 4-92. From the Finishing Menu, select the following: Copies 5, Staple ON, Staple Dual Does the Stapler Base move freely back and forth? Diagnostic Information 2-41