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Reissued: 30-Nov-15
Model:
Taurus-C1/P1 (D074/D075/M044)
D
Troubleshooting various SCs exhibited after replacing the Laser Unit
Various SCs that are issued after replacing the laser unit are due to incorrect positioning
of the lens and/or the mirror installed in the laser unit. Do the procedures "a-2" and/or
"d" described in the Troubleshooting Table.
Troubleshooting Table
Symptom
a) Color
misalignment
in the sub
scan direction
b) SC496
(logged only)
4 continuous
SC496 will
result in
SC285.
c) SC26x
(logged only)
4 continuous
SC26x will
result in
SC285.
d) SC22x
(logged only)
(LD1 Laser
Synchronizatio
n Detection
Error) SC21x
(Trailing Edge
Beam Error)
echnical
T
Possible causes
(1) ITB feed-back control
is turned OFF due to a
dirty ITB feedback
sensor.
(2) Lens assembly in the
laser unit is out of
position (possibly during
transportation).
(3) ITB tension roller
shaft is not in the correct
position due to a worn
stopper.
(1) Lens assembly in the
laser unit is off-
positioned (possibly
caused by
transportation).
(2) Dirty MUSIC sensor
preventing reading the
pattern on the ITB, or a
damaged ITB
Defective laser unit skew
motor
The mirror assembly in
the laser unit is off-
positioned (possibly
caused during
transportation).
ulletin
B
Date:
02-Mar-12
Check procedure
(1) Check the setting of
SP2915-001 (Encoder
Sn Ctrl Condition).
If SP2915-001=0, ITB
feed-back control is
invalid.
(2) See RTB#
RD074025.
(3) Check the condition
of the ITB tension roller
unit.
(1) See RTB#
RD074025.
(2) Check the conditions
of the MUSIC sensor
and the ITB.
See "Action 2" described
on the following page.
PAGE: 2/7
No.:
RD074050c
Action
(1) See "Action 1"
described on the
following page.
(2) See RTB#
RD074025.
(3) Replace the ITB
tension roller unit with a
new one.
(1) See RTB#
RD074025.
(2) Clean the MUSIC
sensor. Replace the ITB
if necessary.
See "Action 2" described
on the following page.
Replace the Laser Unit
with a new one.
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