Lexmark C 540n, Service Manual

Page: 53 / 262

Diagnostic information
2-19
5025-2xx, 4xx
955. xx Service
Code CRC < loc >
The Code ROM or NAND flash failed
the Cyclic Redundancy Check (CRC)
check or the NAND experienced an
uncorrectable multi-bit failure. <
loc >
indicates the source of the failure and
has one of the following values:
• CRC Failure : The source is a
failing package indicated by P n
where n is the package number.
This error could occur on a
controller with ROM or NAND flash
and could occur as a result of the
CRC check done when the
machine is powered on. The range
of package numbers is from 0 to
15.
• Error Correction Code (ECC)
Failure
: The source is a failing
page indicated by B n where “ n ” is
the page number. This error occurs
only if a multi-bit failure is detected
during the ECC execution. Single
bit failures will be corrected
automatically and will not result in a
service error. The range of page
numbers is from 0 to 1023.
956.00 Service
System Board Controller board failure. Processor
failure. Replace the controller board. See
“Controller board removal” on
page 4-20
.
956.01 Service
System Board Processor over temperature.
957. xx Service
System Board
Controller board failure. ASIC failure.
958. xx Service
NAND Failure
Printer has performed more than 100
“shift and reflash” operations as a
result of ECC bit corrections.
959.01 Service
Invalid Firmware Controller verification failure of system
boot code Update firmware or replace the controller
board. See
“Controller board removal”
on page 4-20 .
959.02 Service
Invalid Firmware Failure to authenticate Signature
Verification Code. Update firmware or replace the controller
board. See
“Controller board removal”
on page 4-20 .
959.03 Service
Invalid Firmware Signature verification Code failure to
authenticate a code partition. Update firmware or replace the controller
board. See
“Controller board removal”
on page 4-20 .
959.04 Service
Invalid Firmware Jump to unverified address. Update firmware or replace the controller
board. See
“Controller board removal”
on page 4-20 .
959.05 Service
Invalid Firmware Unknown Boot Failure. Update firmware or replace the controller
board. See
“Controller board removal”
on page 4-20 .
959.20 Service
System Board System hardware failure. Replace the controller board. See
“Controller board removal” on
page 4-20
.
Service error messages (1xx, 9xx) (continued)
Error code Description Action