Epson Stylus Color 1520 Service Manual page 132

Printing Printing
operation is occasionally
abnormal isn't
(cont.) performed
(cont.)
Table 5-10. Repair of M4I60 Printer Mechanism (3)
Symptom Condition
Printing A vertical
operation is line is not
abnormal. aligned.
White
banding
problem
occurs.
Outlines of
images are
not clear.
Color
printing is
abnormal.
Paper is fed Paper is not
abnormally. fed.
The top of
the paper is
not
positioned
properly.
The ink cartridge is Install a new cartridge and
defective. run the self-test. (The
cartridge might have been
removed and reinstalled
several times by the user.)
Cause Checkpoint
Bi-D is not properly
adjusted.
The printhead is Repeat cleaning at least 3
defective. times and check if the
condition is improved. If not,
replace the printhead unit
and run a self-test.
Paper feed
mechanism does
not operate
normally.
Printhead angle is
not properly
adjusted.
Head gap is not
properly adjusted.
black/color
printhead vertical
is not adjusted
properly.
The printhead unit
is defective.
Foreign objects are Turn the knob and check if
lodged in the edge the paper feed mechanism is
guide, PF roller, functioning normally.
paper guide unit,
and paper eject
drive unit.
PF motor is Check if the resistance of
defective. the motor coil is as follows:
10 Ω ± 10 % at 77°F (25°C)
per phase.
Micro pearl of the Check if micro pearl is
glossy film remains located on the PF roller.
on the PF roller,
which gives the PF
roller less grip.






(Refer to Table 5-1.)
Troubleshooting
Replace the ink
cartridge.
Solution
Perform the
adjustments.
(Refer to Chapter 4.)
Replace the printhead
unit.
Replace the PF motor.
Perform adjustments.
(Refer to Chapter 4.)
Perform adjustments.
(Refer to Chapter 4.)
Perform adjustments.
(Refer to Chapter 4.)
Replace the printhead
unit.
Remove the foreign
objects.
Replace the PF motor.
Clean the PF roller.
5-15