Lexmark W820 - Optra B/W Laser Printer Service Manual page 100

990 - Error Code Service Check
Logic control sensed that there is a problem with the Stapler Dual Position function.
Step Actions and Questions
1 SENSOR TEST
Enter Diagnostics and check the Stapler Front 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 FRONT SENSOR
Replace the Stapler Front Sensor. 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 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?
4 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?
5 TRAVERSE MOTOR TEST
From the Finishing Menu, select the following:
Copies 5, Staple ON, Staple Dual
Does the Stapler Traverse Motor test ok?
6 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?
7 STAPLER ASSEMBLY
Replace the Stapler Assembly. Go to
Removal" on page
following: Copies 5, Staple ON, Staple Dual
Does the Stapler Base move freely back and forth?
8 STAPLER TRAVERSE MOTOR
Replace the Stapler Traverse Motor. Go to
Assembly Removal" on page
Menu, select the following: Copies 5, Staple ON, Staple Dual
Does the Stapler Traverse Motor test ok?
2-40
Service Manual
4025-Finisher
"Stapler I Assembly
4-92. From the Finishing Menu, select the
"Traverse Motor
4-102. From the Finishing
Yes
Go to step 3
Problem
solved
Go to step 5
Problem
solved
"Sensor,
4-113.
Go to step 6
Go to step 10
Problem
solved
Problem
solved
No
Go to step 2
Go to step 9
Go to step 4
Go to step 9
Go to step 8
Go to step 7
Go to step 10
Go to step 9