Brother International HL-3400CN Service Manual - Page 276
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HL-3400CN SERVICE MANUAL Code C3 Description of Error Cause of Error NVRAM Error 1. Failure of MCTL PCB CPU EEPROM Clearance Method 1. Turn on and off the power switch. 2. Above method 1 does not work, implement "C3 Error Clearance Procedure". 3. Replace the failed MCTL PCB with a new one. C3
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HL-3400CN
SERVICE
MANUAL
Code
Description
of
Error
Cause
of
Error
Clearance
Method
C3
NVRAM
Error
1.
Failure
of
MCTL
PCB
CPU
EEPROM
1.
Turn
on
and
off
the
power
switch.
2.
Above
method
1
does
not
work,
implement
"C3
Error
Clearance
Procedure".
3.
Replace
the
failed
MCTL
PCB
with
a
new
one.
C3
<Does
the
error
repeat
despite
of
implementing
"On/Off
of
Power
Switch"
?
v
YES
Does
the
error
repeat
despite
of
implementing
"NVRAM
INITIAL"
?
Ilr
YES
NO
NO
Continue
to
drive
the
engine.
Replace
the
failed
MCTL
PCB
with
a
new
one.
Continue
to
drive
the
engine.
Code
Description
of
Error
Cause
of
Error
Clearance
Method
C4
Hard
Error
of
MCTL
Control
Circuit.
1.
Failure
of
MCTL
PCB.
1.
Turn
on
and
off
the
power
switch.
2.
Replace
the
failed
MCTL
PCB
with
a
new
one.
C4
`Does
the
error
repeat
despite
of
implementing
"On/Off
of
Power
Switch"
?
YES
NO
Replace
the
failed
MCTL
PCB
with
a
new
one.
Continue
to
drive
the
engine.
8-18