2L6/2N6/2N5/2N4
1-4-291
(20) Shifted colors.
(21) Dirty reverse side of paper.
Print example
Cause of trouble
1. False detection of the velocity of rotation of the
transfer belt.(Noise)
Defective part
Check description
Corrective Action
1
Color Regist
Adjustment
Check if U469 Color Regist
Adjustment is performed after
power is turned on and warming-
up completes.
If U469 Color Registration adjustment has not
been done, perform U464 Calibration, then
U469 Color Registration.
(see page 1-3-197,1-3-205)
2
Motor control PWB If the above remedy won't work,
check whether an intensive color
shift in the direction of sub scan
is observed.
If it does not cure,replace the motor control
PWB.
3
LSU
Check if adjusting the color shift
can help compensation in the
direction of main scan.
Replace the laser scanner unit if necessary.
(see page 1-5-43)
Print example
Defective part
Check description
Corrective Action
1
Secondary transfer
roller
Check if the secondary transfer
roller is dirty with toner.
1. Clean the secondary transfer roller.
2. Reset U106 Bias settings to its default.
2
Fuser pressure
roller
Check that a foreign object is
stuck on the fuser pressure
roller.
1. If a foreign object exists, clean the fuser
pressure roller.
2. If the paper and the paper weight do not
match, choose the proper paper weight
setting.
3
Upper conveying
guide
Check if the conveying guide is
dirty with toner.
If the conveying guide is dirty with toner,clean
the conveying guide or the developer unit.
Summary of Contents for TASKalfa 3051ci
Page 5: ...2L6 2N6 2N5 2N4 1 4 4 Machine Option2 Figure 1 4 4 Paper jam location Matchine Option2 ...
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Page 257: ...2L6 2N6 2N5 2N4 5 1 4 256 16 Grainy image See page1 4 272 ...