Brother HL-4140CN Service Manual page 44

Error
Problem
codes
6C Fuser unit error. (The center
thermistor detects 270 °C or
higher temperature for 1 second.)
6D Fuser unit error. (The center
thermistor detects 60 °C or
lower temperature for 1 second
during standby or printing.)
6E Fuser unit error. (The center
thermistor fails to detect the
temperature rise even after the
halogen heater is turned ON
during printing and 15 second
pass.)
6F Fuser unit error. (The center and
side thermistors detect extremely
high temperature.) (Detection of
hardware.)
70 Fuser develop motor error.
71 Laser unit polygon motor error.
72 Beam detecting sensor (Black/
Yellow) error of the laser unit.
73 Beam detecting sensor (Cyan/
Magenta) error of the laser unit.
74 The color toner reached the end
of life during printing.
75 Cooling down the inside of the
printer to protect it.
76 Fuser unit error. (The center
thermistor detects the sharp
temperature rise.)
78 Fuser unit error. (The center
thermistor detects the sharp
temperature fall.)
7A Engine PCB error. (detection of
PF drive motor lock error.)
7B Engine PCB error.
7C Communication error between
the engine PCB and main PCB.
Refer Error
to: codes
2-46 7D Dirt on drum unit.
7E Belt unit is at the end of life.
(The operation is stopped.)
2-46 7F An unidentified error occurred.
81 Incorrect density sensor
measurement value when
implementing adjustment of
color density.
2-46
82 Density patch measurement is
not completed normally when
implementing adjustment of
color density.
2-47 83 Drum unit error.
(An drum error occurred after
the drum unit reached the end of
life.)
2-47 84 Paper jam at the rear section of
the printer.
2-48
2-48 85 The paper tray 1 is not installed.
86 The paper tray 2 is not installed.
2-48 87 Toner of the color which is being
used reaches the end of life
when implementing adjustment
of color density.
2-49
88 Paper jam inside the printer.
2-49 89 Unsupported paper size is used
for duplex printing.
2-50 8A Paper jam in the paper tray 1.
8B Paper jam in the paper tray 2.
8C Paper jam in the MP tray.
2-50 8D Paper jam occurred around the
back cover at the time when the
power was turned ON, or the
fuser cover is open.
2-50 8E Error in the adjustment of
inter-color position alignment
result when implementing it.
2-51
2-51
2-13
Problem
Confidential
Refer
to:
2-51
2-54
2-54
2-55
2-55
2-55
2-56
2-57
2-57
2-58
2-58
2-59
2-59
2-60
2-61
2-61
2-62