Lexmark W820 - Optra B/W Laser Printer Service Manual page 96

Step Actions and Questions
6 FINISHER MAIN BOARD
Replace the Finisher Main Board. Go to
Main Removal" on page
the Sensor and/or Punch Assembly 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?
7 MCU BOARD
Replace the MCU Board. Refer to the Printer Service Manual.
Enter Diagnostics and check the Sensor and/or Punch
Assembly function.
Does the Sensor and/or Punch Assembly test ok?
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 Punch Assembly area or
along the paper path.
987 - Error Code Service Check
Logic control sensed that the Stapler failed.
Step Actions and Questions
1 STAPLER INSPECTION
Inspect the Stapler for broken parts, jammed staples, or
obvious signs of damage.
Does the Stapler appear to be in good condition, with no
jammed staples or obvious signs of damage?
2 STAPLER CARTRIDGE
Replace the Stapler Cartridge. Go to
on page 4-101.
Does the Stapler function correctly?
3 STAPLER ASSEMBLY
Replace the Stapler Assembly. Go to
Removal" on page
Does the Stapler function correctly?
2-36
Service Manual
4025-Finisher
"PWB Assembly-
4-132. Enter Diagnostics and check
"Cartridge Removal"
"Stapler I Assembly
4-92.
Yes No
Problem Go to step 7
solved
Problem Go to step 8
solved
Yes No
Go to step 2 Clear the
staples or
replace the
damaged
FRUs
Problem Go to step 3
solved
Problem Go to step 4
solved