Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 21

Error
Problem
codes
75
Machine cooling down inside
76
Fuser unit failure
78
Fuser unit failure
7C
Engine communication error
7D
Dirt on drum unit
81
Incorrect density sensor measurement
value when implementing calibration
from the control panel.
82
Density patch measurement is not
completed normally when implementing
calibration from the control panel.
84
Paper jam rear side of the machine
85
Tray 1 (T1) is not installed into the
machine.
87
Toner cartridge whose color is used
reaches the end of life when
implementing calibration from the
control panel.
88
Paper jam inside the machine
89
Incorrect paper size in duplex printing
8A
Paper jam in Tray 1 (T1)
8B
Paper jam in Tray 2 (LT)
8C
Paper jam in MP tray (MP)
8E
Auto color registration failure when
implementing it from the control panel
8F
Sensor sensitivity adjustment failure
when implementing auto color
registration from the control panel
90
Incorrect paper size (MP)
91
Incorrect paper size (T1)
92
Incorrect paper size (LT)
93
No paper in MP tray (MP)
94
No paper in Tray 1 (T1)
95
No paper in Tray 2 (LT)
96
No paper in all trays
97
Specified paper size is not supported for
Tray 1 (T1).
98
Specified paper size is not supported for
Tray 2 (LT).
99
Specified paper size is not supported for
duplex printing (DX).
9A
Manual paper feeding is selected.
Refer Error
to: codes
1-6 9B
Request on developing bias voltage
adjustment
1-23
1-23 9C
Request on auto color registration
1-16 9D
Incorrect sensor measurement value
when implementing auto color
1-23
registration from the control panel
1-24
9E
Toner cartridge whose color is used
reaches the end of life when
1-24
implementing auto color registration from
the control panel.
A1
Front cover opened
1-25 C0
Identification failure for a new toner
cartridge (K)
1-26
C1
Identification failure for a new toner
cartridge (Y)
1-22
C2
Identification failure for a new toner
cartridge (M)
1-25 C3
Identification failure for a new toner
cartridge (C)
1-26
1-27 C4
Tray 2 (LT) plate-up function
malfunction
1-27
1-27 C5
EL lamp electrifying failure
1-28 C6
Toner cartridge mis-dividing
C7
Insufficient DIMM memory
1-28 C8
RAM area for secure data full
C9
Defective DIMM is installed.
CA
Excess current to USB device
1-7 CB
Belt unit is not installed into the machine.
1-7 CC
Fuser unit is not installed into the machine.
1-7 CD
Drum unit is not installed into the machine.
1-29 CE
Waste toner box is not installed into the
machine.
1-29
1-30 CF
Waste toner box full
1-7 E0
Program error
1-7 E1
Program error
E6
NVRAM error on main PCB
1-8 EB
NVRAM reading error on laser unit
ED
Failure of wireless LAN connection
1-8 EE
Wireless LAN is unable to communicate.
EF
Incorrect print coverage value
1-29
1-4
Problem
Confidential
Refer
to:
1-8
1-8
1-28
1-22
1-30
1-31
1-31
1-31
1-31
1-32
1-32
1-32
1-8
1-33
1-9
1-33
1-33
1-34
1-34
1-36
1-36
1-9
1-9
1-37
1-37
1-37
1-37
1-37