Lexmark W820 - Optra B/W Laser Printer Service Manual page 95

Step Actions and Questions
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.
• Broken or damaged FRUs within the Shift Roll area.
986 - Error Code Service Check
Logic control sensed that the Punch failed.
Step Actions and Questions
1 SENSOR TEST
Enter Diagnostics and check the Finisher 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?
2 FINISHER PATH SENSOR
Replace the Finisher Path Sensor. Enter Diagnostics and
check the Finisher 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?
3 SENSOR TEST
Enter Diagnostics and check the Finisher Exit 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 EXIT PATH SENSOR
Replace the Finisher Exit Path Sensor. Go to
Path Removal" on page
the Finisher Exit 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 PUNCH ASSEMBLY TEST
From the Finishing Menu, select Hole Punch On. From the
Utilities Menu, select Quick Demo.
Does the Punch Assembly test ok?
4025-Finisher
"Sensor, Exit
4-42. Enter Diagnostics and check
Yes No
Yes No
Go to step 3 Go to step 2
Problem Go to step 6
solved
Go to step 5 Go to step 4
Problem Go to step 6
solved
Go to step 6 Replace the
Punch
Assembly
Diagnostic Information
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