Brother International HL-3400CN Service Manual - Page 294
<Is, Control
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CHAPTE8RTROUBLESHOOTING Error Code Concerned Part FO Fan Motor (Control Cooling) Confirm the connection of a fan motor connector. V NO Is DCN18 of I0D1 properly connected with a connector of the fan motor ? Is DCN1 of I0D1 properly connected with 11CN of MCTL PCB ? OYES Check the voltage (CTFANON-P YES ol NO V ?› YES 01 YES OP. Job is complete. Ft* Replace the MCTL PCB. M1CT1LC34N34C+PPT20GGF4NNAVNDD-1DD341203475CCNIONN-1PDD21N12318CCTPTOFGFDAANNND0ENR-RPCoFCntArTolNLFan 8-36
CHAPTER
8 TROUBLESHOOTING
Error
Code
FO
Concerned
Part
Fan
Motor
(Control
Cooling)
Confirm
the
connection
of
a
fan
motor
connector.
V
Is
DCN18
of
I0D1
properly
connected
with
a
connector
of
the
fan
motor
?
Is
DCN1
of
I0D1
properly
connected
with
11CN
of
MCTL
PCB
?
O
YES
NO
Check
the
voltage
(CTFANON-P
Connect
them
properly.
qf
Is
FO
error
cleared
?
>
YES
OP.
Job
is
complete.
NO
<Is
the
voltage
between
DCN18-1
YES
2
to
be
trailing
?
>
Replace
the
fan
motor.
and
a
edge
o l
V
NO
<Is
the
voltage
between
DCN1-33
and
44
to
be
a
trailing
edge
?›
YES
Replace
the
IOD1
PCB.
01
T
4
4
NO
Is
FO
error
cleared
?
NO
Replace
the
MCTL
PCB.
YES
V
Job
is
complete.
MCTL
11CN
44
33
0
PGND
Ft*
IOD1
CTFAN0N-P
+24V-1
PGND
DCN
44
33
1D
DCN2
17
25
N18
1
2
3
OD
CTFAN0N-P
Control
Fan
PGND
CTFANERR
CTL
FAN
8-36