Brother International HL-3400CN Service Manual - Page 302
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CHAPTER 8 TROUBLESHOOTING Error Code Concerned Part LL Laser Unit Confirm the connection of an laser unit connector. V NO Is the connector LCN3 properly connected ? Is the connector PDCN properly connected ? Are the connector LCN1 and LCN properly connected ? 4 YES V Replace the laser unit. fpT Is LL error cleared ? YES 4NO Replace the MCTL PCB. or DC power supply (LVPS). Connect the connector properly. V Is LL error cleared ? YES I NO Ir T Job is complete. MCTL LCN PD 3 LDU - IPDCN 0 20 ] E LCN3 5 LCN1 Laser Unit SM 8-44
CHAPTER
8
TROUBLESHOOTING
Error
Code
LL
Concerned
Part
Laser
Unit
Confirm
the
connection
of
an
laser
unit
connector.
V
Is
the
connector
LCN3
properly
connected
?
Is
the
connector
PDCN
properly
connected
?
Are
the
connector
LCN1
and
LCN
properly
connected
?
NO
Connect
the
connector
properly.
V
Is
LL
error
cleared
?
4
I
NO
YES
V
Replace
the
laser
unit.
fp
T
Is
LL
error
cleared
?
4
NO
Replace
the
MCTL
PCB.
or
DC
power
supply
(LVPS).
YES
YES
Ir
T
Job
is
complete.
MCTL
LCN
PD
3
LDU
0
20
-
I
PDCN
LCN3
]
E
LCN1
5
Laser
Unit
SM
8-44