Brother MFC-L2712DN - Page 43


Error code 6801
The side thermistor detected a temperature higher than the specified value.
<User Check>
•
Low
er the r
oom te
mpe
rat
ure.
•
Keep the
machin
e away f
rom heat
ing appl
iances
.
•
Check
that
the fa
n is
not c
logged
.

Error code 6901
Some fuser unit errors occurred at power-ON or upon recovery from sleep mode.
Error code 6902
After the error was detected at the fuser unit, power was turned ON again and t
he error is
being checked. (If power is turned OFF and ON after error code 6901 occurred, this code is
displayed for about 15 minutes.)
S
t
e
p
C
a
u
s
e
R
e
m
e
d
y
1
Connection failure of the side
thermistor harness
Reconnect the side thermistor harness.
2
F
u
s
e
r
u
n
i
t
t
h
e
r
m
i
s
t
o
r
f
a
i
l
u
r
e
R
e
p
l
a
c
e
t
h
e
f
u
s
e
r
u
n
i
t
.
3
M
a
i
n
P
C
B
f
a
i
l
u
r
e
R
e
p
l
a
c
e
t
h
e
m
a
i
n
P
C
B
A
S
S
Y
.
S
t
e
p
C
a
u
s
e
R
e
m
e
d
y
1
Connection failure of a fuser unit
harness
Reconnect the fuser unit harness.
2
Connection failure of the eject
sensor PCB harness
Reconnect the eject sensor PCB harness.
3
F
u
s
e
r
u
n
i
t
f
a
i
l
u
r
e
R
e
p
l
a
c
e
t
h
e
f
u
s
e
r
u
n
i
t
.
4
E
j
e
c
t
s
e
n
s
o
r
P
C
B
f
a
i
l
u
r
e
R
e
p
l
a
c
e
t
h
e
e
j
e
c
t
s
e
n
s
o
r
P
C
B
A
S
S
Y
.
5
Low-voltage power supply PCB
failure
Replace the low-voltage power supply
PCB ASSY.
6
M
a
i
n
P
C
B
f
a
i
l
u
r
e
R
e
p
l
a
c
e
t
h
e
m
a
i
n
P
C
B
A
S
S
Y
.
Note:
•
Turn OFF the power
switch. After the fuser
unit has cooled suf
ficiently
, turn ON the
power
switch again and leave the machine for 15 minutes. This problem may then be cleared.
•
T
o release the
fuser unit error
after taking
appropriate measures, enter the
maintenance
mode once and quit it with the function code 99.