912 errors
912 error messages
Error code Description Action
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 187.
94y errors
94y error messages
Error code Description Action
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.
Go to
“LVPS service check” on page 89.
948.xx Failed engine card—pel clock check failed.
Replace the controller board.
Go to
“Controller board removal” on page 187.
949.xx Failed engine card—delay line calibration failure.
Replace the controller board.
950–958 errors
950–958 error messages
Error code Description Action
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
Go to
“NVRAM mismatch failure service check” on
page 102.
952.xx A recoverable NVRAM Cyclic Redundancy Check (CRC)
error occurred—n is the offset at which the error
occurred.
Go to
“NVRAM cyclic redundancy service check” on
page 103.
4514
Diagnostic information
101
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