Lexmark W820 - Optra B/W Laser Printer Service Manual page 92

Step Actions and Questions
2 JOGGER HOME POSITION SENSOR
Replace the Jogger Home Position Sensor. Go to
Jogger Home Position Removal" on page
Diagnostics and check the Jogger Home R 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 FINISHER MAIN BOARD
Replace the Finisher Main Board. Go to
Main Removal" on page
the Jogger Home R 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 MCU BOARD
Replace the MCU Board. Refer to the Printer Service Manual.
Enter Diagnostics and check the Jogger Home R 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 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
• FRUs within the Jogger Assembly
984 - Error Code Service Check
Logic control sensed that there is a problem at the Exit Roll.
Step Actions and Questions
1 SENSOR TEST
Enter Diagnostics and check the Exit Roll Open/Close HP
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?
2-32
Service Manual
4025-Finisher
4-68. Enter
"PWB Assembly-
4-132. Enter Diagnostics and check
Yes
Problem
solved
"Sensor,
Problem
solved
Problem
solved
Yes
Go to step 3
No
Go to step 3
Go to step 4
Go to step 5
No
Go to step 2