Error code Description Action
121.25 After line voltage detection, control did not
roll over to steady state control in time
If the problem remains, replace the controller board. See
“Controller board removal” on page 386.
121.26 Fuser failed to reach temperature during
warm up
See “Fuser service check” on page 111.
121.28 Fuser failed to reach EP warm-up
temperature in time
See “Fuser service check” on page 111.
121.29 Fuser failed to reach preheat temperature
for motor start during warm up
See “Fuser service check” on page 111.
121.30 Fuser failed to reach printing temperature
by the time a page got to the fuser
See “Fuser service check” on page 111.
121.31 Fuser has gotten too hot See “Fuser service check” on page 111.
121.35 Attempting to reset the printer after
receiving a 121.34
If the problem remains, replace the controller board. See
“Controller board removal” on page 386.
121.36 Fuser did not heat to allow compression
jog
See “Fuser service check” on page 111.
121.32 Open fuser main thermistor If the problem remains, replace the fuser. See “Fuser removal”
on page 347
121.33 Open fuser edge thermistor If the problem remains, replace the fuser. See “Fuser removal”
on page 347
121.34 Open fuser backup roll thermistor If the problem remains, replace the fuser. See “Fuser removal”
on page 347.
121.37 Fuser heated faster than allowed during
line voltage detection (115V fuser in 220V
machine)
If the problem remains, replace the fuser. See “Fuser removal”
on page 347.
121.48 Fuser Hardware type does not match fuser
driver loaded (for example, lamp hardware
or belt firmware)
If the problem remains, replace the fuser. See “Fuser removal”
on page 347.
121.49 Fuser backup roll too hot while printing
non-wide media
If the problem remains, replace the fuser. See “Fuser removal”
on page 347.
126.01 Line Frequency outside operating range of
device
See “LVPS service check” on page 112.
126.02 No line frequency detected See “LVPS service check” on page 112.
130.01 Transfer servo error Reset the machine. If the error remains, replace the imaging
unit.
133.05 Toner Level Sensing reading above
maximum expected value
See “Toner level sensing service check” on page 112.
133.06 Toner Level Sensing reading below
minimum expected value
See “Toner level sensing service check” on page 112.
133.07 Toner failed to replenish into the Imaging
Unit
See “Toner level sensing service check” on page 112.
133.08 Excessive toner level sensing noise See “Toner level sensing service check” on page 112.
7463
Diagnostic information
107
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