9xx error messages
Error code Description Action
900.xx RIP firmware errors Go to “System software error service check” on
page 143.
912.xx Unrecoverable Engine firmware error POR the machine. If the error re‑occurs, then update
the firmware. If the error continues occurring, then
replace the controller board. Go to “Controller
board removal” on page 386.
940.xx RIP to engine communication failure—the zero
crossing signal used for fuser control in the low voltage
(LV) power supply has failed, or the wrong low voltage
power supply has been installed.
Check the LVPS. Go to “LVPS service check” on
page 112.
948.xx Failed engine card—pel clock check failed. Replace the controller board. Go to “Controller
board removal” on page 386.
949.xx Failed engine card—delay line calibration failure.
950.xx NVRAM mismatch failure—mismatch between
controller board EEPROM and control panel mirror.
".xx" codes:
• 00-29— mismatch between system and mirror
• 30-60—mismatch between secure and system
Warning—Potential Damage: When replacing any
of the following components:
• Control panel assembly
• Controller board assembly
Replace only one component at a time. Replace the
required component and perform a POR before
replacing a second component listed above. If this
procedure is not followed, the printer will be
rendered inoperable. Never replace two or more of
the components listed above without a POR after
installing each one or the printer will be rendered
inoperable.
Never install and remove components listed above
as a method of troubleshooting components. Once
a component has been installed in a machine, it can
not be used in another machine. It must be returned
to the manufacturer.
Go to “NVRAM mismatch failure service check” on
page 147.
952.xx A recoverable NVRAM Cyclic Redundancy Check (CRC)
error occurred—n is the offset at which the error
occurred.
POR the printer.
953.xx NVRAM chip failure with mirror part Replace the controller board. Go to “Controller
board removal” on page 386.
954.xx NVRAM chip failure with system part
955.xx The Code ROM or NAND flash failed the Cyclic
Redundancy Check (CRC) or the NAND experienced an
uncorrectable multi-bit failure.
956.xx The flatbed scanner and ADF cannot properly
communicate with the controller board in the base
printer.
See “Communication failure with flatbed scanner
and ADF” on page 143.
7463
Diagnostic information
140
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