Brother HL-3450CN Service Manual page 155

CHAPTER 5 CONTROL PANEL OPERATION
41
Laser beam position and laser power can be checked.
Procedure
1) Press the Reprint button after selecting
screen (a) "BD CHECK".
2) The scanner motor scans the laser beam as
it is rotating. If the scanning position of the
laser beam is normal, "GOOD" is displayed
on the LCD, otherwise "FAIL". (b) or (c)
Scanner motor automatically stops rotating
after 60 seconds.
3) Press the - button to exit the BD CHECK
mode.
42
Availability of oil in the fusing unit can be checked.
Procedure
1) Press the Reprint button after selecting
screen (a) "FU CHECK".
2) The fusing unit starts the heat-up process,
and checks the availability of fuser oil. If oil is
available in the fusing unit, "GOOD" is
displayed in the LCD, otherwise, "FAIL".
3) Press the - button to exit the FU CHECK
mode.
BD CHECK
Description of Procedures
(a)
(d)
(b)
FU CHECK
Description of Procedures
(a)
(b)
(c)
o
(b)
39 FACTORY MODE
a)
41 BD CHECK
b)
41 BD CHECK
c)
o
(d)
39 FACTORY MODE
d)
39 FACTORY MODE
a)
43 FU CHECK
b)
OIL:GOOD
39 FACTORY MODE
c)
5-30
LCD Message
BD CHECK
GOOD
FAIL
DP CHECK
LCD Message
FU CHECK
DP CHECK