Epson Photo750 Service Manual page 54

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