Error code Description Action
121.27
Service Fuser Error
Fuser over temperature. Note: Some of these errors are caused by
a faulty component on the LVPS. Check the
history file in the printer to verify other
occurrences. If there are others, then
replace the LVPS. See “Low‑voltage power
supply (LVPS) assembly removal” on
page 268. Then, see “121.xx Fuser service
check” on page 83.
121.28
Service Fuser Error
Fuser open thermistor check failed. See “121.xx Fuser service check” on
page 83.
121.29
Service Fuser Error
Attempting to print with estimated power at or
above minimum power.
121.30
Service Fuser Error
Fuser failed to reach final temperature in time.
121.31
Service Fuser Error
Fuser power is below minimum.
121.36
Service Fuser Error
Fuser under temperature in standby.
121.37
Service Fuser Error
Fuser under temperature while printing.
121.38
Service Fuser Error
Fuser open thermistor.
121.39
Service Fuser Error
Fuser shorted thermistor.
121.40
Service Fuser Error
121.42
Service Fuser Error
Fuser power above maximum.
121.5x
Service Fuser Error
Fuser is past life and has an error. Replace the fuser. See “Fuser assembly
removal” on page 257.
121.6x
Service Fuser Error
121.7x
Service Fuser Error
121.8x
Service Fuser Error
121.9x
Service Fuser Error
7527
Diagnostic information
78