Epson Stylus COLOR 1520 Service Manual page 131

EPSON 6W\OXV &2/25 1520
Symptom Condition
Printing A vertical
operation is line is not
abnormal. aligned.
White
banding
problem
occurs.
Outline of
the image is
not clear.
Color print is
abnormal.
Paper is fed Paper is not
abnormally. fed.
The top of
the paper is
not properly
positioned.
5-14
Table 5-10. Repair of M4I60 Printer Mechanism (3)
Cause
Bi-D is not properly
adjusted.
The head is
defective.
Paper feed
mechanism doe not
operate normally.
Head angular is not
properly adjusted.
Head gap is not
properly adjusted.
black/color head
vertical is not
properly adjusted.
The head unit is
defective.
Foreign objects are
lodged in the edge
guide, PF roller,
paper guide unit,
and paper eject
drive unit.
PF motor is
defective.
Micro pearl of the
glossy film remains
on the PF roller,
which gives the PF
roller less grip.
Checkpoint
Repeat cleaning at least 3
times and check if the
condition is improved. If not,
replace the head unit and run
the self-test.
Turn the knob and check if
the paper feed mechanism is
normally functioning.
Check if the resistance of the
motor coil is as follows;
10 •} 10% at 25 ••
per phase
(Refer to Table 5-1.)
Check if micro pearl is
located on the PF roller.
Solution
Perform the adjustments.
(Refer to Chapter 4.)
Replace the head unit.
Replace the PF motor.
Perform the adjustment.
(Refer to Chapter 4.)
Perform the adjustment.
(Refer to Chapter 4.)
Perform the adjustment.
(Refer to Chapter 4.)
Replace the head unit.
Remove the foreign
objects.
Replace the PF motor.
Clean the PF roller.
Rev. A