Lexmark W820 Service Manual page 111

Error Code 996
Logic control sensed that the installed Mailbox is not compatible with the printer.
Step Actions and Questions
1 MAILBOX INSPECTION
Inspect the Mailbox to make sure it is the correct manufacture
and model for the printer.
Is the Mailbox Unit the correct manufacture and model for
this printer?
2 RESET
Turn off the printer. Wait one minute, then turn on the printer.
Is the error code gone?
3 RESEAT
Disconnect then reconnect the Mailbox from the printer.
Is the error code gone?
4 MAILBOX PWB
Replace the "Mailbox Control PWB" on page
Is the error code gone?
5 MCU BOARD
Replace the printer Engine Board (MCU PWB). Go to the
Printer Service Manual for the Removal and Replacement
Procedure.
Is the error code gone?
6 The following Mailbox 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 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.
4025 Options
4-44.
Yes No
Go to step 2 Replace the
Mailbox with a
correct one
Problem Go to step 3
solved
Problem Go to step 4
solved
Problem Go to step 5
solved
Problem Go to step 6
solved
Diagnostic Information
2-29