Lexmark W820 Service Manual - Page 97

4025-Finisher Step Actions and Questions Yes 4 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? 5 MCU BOARD Problem Replace the MCU Board. Refer to the Printer Service Manual. solved Check the Stapler function. Does the Stapler function correctly? 6 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 • Broken or damaged FRUs within the Stapler area, Compiler area, or along the paper path. 988 - Error Code Service Check Logic control sensed that there is a problem at the Stapler Head Home Sensor. No Go to step 5 Go to step 6 Step Actions and Questions Yes No 1 SENSOR TEST Go to step 3 Go to step 2 Enter Diagnostics and check the Stapler Head Home 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 HEAD HOME SENSOR Problem Go to step 7 Replace the Stapler Head Home Sensor. Go to "Sensor, solved Stapler Home Position Traverse Removal" on page 4-113. 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 Does the Stapler Base move freely back and forth? Go to step 7 Go to step 5 Diagnostic Information 2-37