Brother International HL-3400CN Service Manual - Page 299
Replace, connector., holder., heater.
UPC - 012502526223
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HL-3400CN SERVICE MANUAL Error Code Concerned Part H2,H3,H4 Fusing Unit and Others Confirm that a fusing heater is lit. V NO Is the fusing heater controlled for On/Off. I VES
HL-3400CN
SERVICE
MANUAL
Error
Code
H2,H3,H4
Concerned
Part
Fusing
Unit
and
Others
Confirm
that
a
fusing
heater
is
lit.
V
Is
the
fusing
heater
controlled
for
On/Off.
I
VES
<s
the
line
voltage
to
be
the
default
value
'›
NO
op
O
YES
Confirm
the
input
voltage.
Confirm
the
rating
and
replace
Is
the
rating
of
fusing
heater
correct
?
TIP
,
the
fusing
heater.
0
NO
Are
H2,H3
and
H4
errors
cleared
?
NO
V
Replace
the
fusing
unit.
lip
Confirm
the
wiring
and
connector
of
the
heater.
4
<
Is
the
connector
HP/HN
connected
?
>
NO
I^
Connect
them
properly.
4,
YES
<
Is
the
fusing
unit
properly
installed
?>
NO
Install
it
properly.
4
YES
>YES
<
Is
the
fuser
connector
damaged
?
>YES
11
1
0
Replace
the
connector.
V
Are
H2,H3
and
H4
errors
cleared
?
YES
YES
T
NO
there
any
contract
failure
of
the
lamp
holder>
YES
oo
l
Replace
the
lamp
and
lamp
holder.
T
NO
Is
the
heater
wiring
cut
or
damaged
?>YES1PP
Replace
the
heater.
NO
Are
H2,H3
and
H4
errors
cleared
?
>
gp,),
NO
Replace
the
power
supply
unit
(LVPS).
YES
4
Are
H2,H3
and
H4
errors
cleared
?
>
4
NO
Replace
the
MCTL
PCB.
V V
V
V
Job
is
complete.
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