Lexmark W820 - Optra B/W Laser Printer Service Manual page 97

Step Actions and Questions
4 FINISHER MAIN BOARD
Replace the Finisher Main Board. Go to
Main Removal" on page
Does the Stapler function correctly?
5 MCU BOARD
Replace the MCU Board. Refer to the Printer Service Manual.
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.
Step Actions and Questions
1 SENSOR TEST
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
Replace the Stapler Head Home Sensor. Go to
Stapler Home Position Traverse Removal" on page
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?
4 STAPLER BASE INSPECTION
Does the Stapler Base move freely back and forth?
4025-Finisher
"PWB Assembly-
4-132. Check the Stapler function.
"Sensor,
Yes
Problem
solved
Problem
solved
Yes
Go to step 3
Problem
solved
4-113.
Go to step 4
Go to step 7
Diagnostic Information
No
Go to step 5
Go to step 6
No
Go to step 2
Go to step 7
Go to step 6
Go to step 5
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