Epson Stylus COLOR 670 Service Manual page 64

EPSON Stylus COLOR 670
Table 3-7. Printer Mechanism Troubleshooting (continued)
Symptom Condition
Bi-directional
A vertical line is
alignment is
not aligned.
not adjusted.
Head angle is
not correct.
Platen gap is
not right.
Dot shooting
White line
direction is
appears in the
tilted because
Abnormal image data.
head surface
Printing.
is not clean.
I/C is
defective.
Head unit is
defective.
Print
-Abnormal CR
irregularity
guide surface
appears along
-Top frame
with CR
CR holder rail
scanning
is deformed.
direction.
Troubleshooting
Cause Check Point Solution
Refer to
Perform Bi-D
Chapter 5
adjustment.
"Adjustment".
Perform head Refer to
angle Chapter 5
adjustment. "Adjustment".
Refer to
Perform Platen
Chapter 5
Gap adjustment.
"Adjustment".
Perform cleaning
Perform the
several times
cleaning
and check the
operation.
print quality.
Install a new I/C
and perform self- Replace I/C.
test.
Head unit is Replace the
broken. head unit.
-Check CR guide
surface.
Replace the
CR guide shaft
-Check the form
and top frame.
of top frame CR
holder rail.
Unit Repair (Printer Mechanism)
Table 3-7. Printer Mechanism Troubleshooting (continued)
Symptom Condition
Friction of the
LD roller.
Abnormal
Paper is not
operation of
fed.
the hopper.
Malfunction
of ASF drive
switching
function.
Abnormal
Paper
Feeding.
Friction of PF
roller
Page heading
position is
wrong.
PE sensor is
defective.
Revision A
Cause Check Point Solution
Clean the LD
Load paper and roller with the
check if the LD cleaning
roller revolves sheet. Replace
smooth when the LD roller if
picking up paper. it does not
recover.
Check the
movement of the Replace the
ASF hopper ASF.
visually.
Insert DE lever to
the left side of Replace the
the CR shaft and DE lever and
check if drive ASF drive
from PF roller is switching
transmitted to gear.
the ASF.
Clean the PF
roller by the
Check if the PF
cleaning
roller slips
sheet. Replace
during the paper
the PF roller if
feeding.
the problem is
not solved.
-Check if PE
sensor lever
-Replace the
moves smoothly.
PE sensor
-Check if the
assembly.
assembly with
-Re-assemble
the right paper
each part and
guide is made
remove
correct and check
foreign
if there is any
substances.
foreign
substances.
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