Brother International HL-3400CN Service Manual - Page 284
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CHAPTER 8 TROUBLESHOOTING Error Code El Concerned Part Developer Motor(DM) Is there any unusual rotation noise while printing ? 4N0 Confirm the connection of connector. YES pl 4 Replace the toner cartridge. Is the noise cleared ? NO YES Job is complete. -N° YES V
CHAPTER
8
TROUBLESHOOTING
Error
Code
El
Concerned
Part
Developer
Motor(DM)
Is
there
any
unusual
rotation
noise
while
printing
?
4
N0
Confirm
the
connection
of
connector.
YES
pl
Replace
the
toner
cartridge.
4
V
<Is
DCN9
of
IOD1
properly
connected
with
connector
of
DM1?
>-
N°
YES
V
<Is
DCN1
of
IOD1
properly
connected
with
11CN
of
MCTL?
4
4
Check
the
voltage:
+24V-1
and
+5V-1.
4
+24V-1:
Is
the
voltage
+24V
between
DM1-4
and
6,DCN9-4
and
6,
DCN10-3
and
4
?
YES
+5V-1:
Is
the
voltage
+5V
between
DM1-5
and
9,
DCN9-5
and
9,
DCN10-7
and
9
?
Is
the
noise
cleared
?
NO
Replace
developer
gear
unit
and
motor.
0
Connect
the
connectors
properly.
4
NO
Replace
the
IOD2.
4
4
Is
El
error
cleared
?
NO
Replace
the
developer
motor.
Is
El
error
cleared
?
4
N0
Replace
the
IOD1.
4
4
YES
Job
is
complete.
Is
El
error
cleared
?
O
YES
Job
is
complete.
NO
Replace
the
MCTL
PCB.
MCTL
11CN
6
2
YES
YES
OP
Job
is
complete.
Job
is
complete.
DCN9
(4
-
)
DCN1
O
IOD1
/
DMCLK
1
1
DMRDY-N6
DM1
1
DMON-N
2
2
3
3
4
DMCLK
2
PGND
4
PGND
+24V-1
5
5
+24V-1
3
7
7
6
6
+24V-1
PGND
4
SGND
S
+5V
N
-
D
1
7
8
8
9
+5V-1
9
9
DMON-N
DCN10
8-26