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EPSON Stylus Photo 750 Revision A
Troubleshooting Unit Repair (Printer Mechanism) 49
Table 3-14. Repair of the Printer Mechanism Table 3-15. Repair of the Printer Mechanism
Symptom Condition Cause Check Point Solution
Abnormal
Printing.
A vertical
line is not
aligned.
Bi-directional
alignment is
not adjusted.
Perform Bi-D
adjustment.
Refer to Chapter 5
“Adjustment”.
White line
appears in
the imaged
data.
Head angle is
not correct.
Perform head
angle
adjustment.
Refer to Chapter 5
“Adjustment”.
Platen gap is
not right.
Perform Platen
Gap adjustment.
Refer to Chapter 5
“Adjustment”.
Dot shooting
direction is
tilted because
head surface
is not clean.
Perform cleaning
several times
and check the
print quality.
Perform the
cleaning operation.
I/C is
defective.
Install the new
I/C and perform
self-test.
Replace I/C.
Head unit is
defective.
Head unit is
broken.
Replace the head
unit.
Abnormal
Paper
Feeding.
Paper is not
fed.
Friction of the
PF roller.
Check if the PF
roller rotates
when paper is
not fed.
Clean the PF roller
by the cleaning
sheet. Replace the
PF roller if it does
not recover.
Abnormal
operation of
the hopper.
Check the
movement of the
ASF hopper
visually.
Replace the ASF.
Symptom Condition Cause Check Point Solution
Abnormal
Paper
Feeding.
Paper is
not fed.
Malfunction of
ASF drive
change-over.
Check if the ASF
gear rotates
visually.
Replace the
gears of the
ASF drive
change-over.
Page
heading
position is
wrong.
Friction of the
PF roller.
Check if the PF
roller slips during
the paper
feeding.
Clean the PF
roller by the
cleaning sheet.
Replace the PF
roller if it does
not recover.
Printer
stops during
initialization.
Fatal error
appears.
ASF sensor is
defective.
Check the signal
level of the ASF
sensor.
Replace ASF
sensor.
PE sensor is
defective.
Check the signal
level of the PE
sensor.
Replace PE
sensor.
HP sensor is
defective.
Check the signal
level of the HP
sensor.
Head FFC is
disconnected.
Check if the
head FFC is
connected.
Connect the
head FFC.
CR motor is
defective.
Check the CR
motor cable is
connected.
Replace the CR
motor if there is
no problem in
the cable
connection.
PF motor is
defective.
Check if the PF
motor cable is
connected.
Replace the PF
motor if there is
no problem in
the cable
connection.