Epson Photo750 Service Manual page 53

EPSON Stylus Photo 750
Table 3-12. Repair of the Printing Mechanism
Symptom Condition
Head FFC is
out of
connection.
FFC is
disconnected
inside.
Carriage
Printing is not moves but no
I/C is
performed. printing is
defective.
performed.
Head Unit is
defective.
Print head
surface is not
clean.
Only a
particular dot
Head unit is
Abnormal
causes
defective.
printing
abnormal
printing.
Absorber in
the cap is
touching the
head surface.
Troubleshooting
Cause Check Point Solution
Check visually if
the head FFC on
Connect FFC
the board or
properly.
carriage is
connected firmly.
Check the FFC Replace the
by using a tester. FFC.
Install new I/C
and perform the Replace I/C.
self-test.
If the condition
does not improve
even after 2 or 3
times of cleaning Replace the
operation, head unit.
replace the head
unit and perform
the self-test.
Check the
printing quality
Perform
after performing
cleaning.
the cleaning
several times.
Check the Replace the
printing quality head, if the
after performing print quality
the cleaning does not
several times. recover.
Visually check Replace the
the condition of absorber in
the head the cap if it is
absorber. deformed.
Unit Repair (Printer Mechanism)
Table 3-13. Repair of the Printing Mechanism
Symptom Condition
Print head
surface is not
clean.
FFC is
disconnected
inside.
Head FFC is
out of
Sometime connection.
printing is not
performed.
Head Unit is
defective.
Abnormal
Printing
I/C is
defective.
The head FFC
is out of
connection.
Black specks
or dots.
The head unit
is defective.
Revision A
Cause Check Point Solution
Perform cleaning
several times Perform
and check the cleaning.
print quality.
Check the FFC Replace the
by using a tester. head FFC.
Install new I/C
Connect Head
and perform the
FFC firmly.
self-test.
If the condition
does not improve Replace the
even after 2 or 3 head unit, if it
times of cleaning does not
operation, recover after
replace the head performing
unit and perform cleaning.
the self-test.
Install the new
Replace I/C.
I/C and perform
self-test.
Check if the
Connect FFC
head FFC on the
properly.
board or carriage
is connected
surely.
Replace the
Check head if there is
connection with no connection
the head FFC. problem with
the FFC.
48