Epson Stylus COLOR 1520 Service Manual page 131

Symptom Condition
CR motor CR moves
operates slightly at
abnormally power on
then stops.
Printing is not CR moves
performed. normally,
but does not
perform
Printing.
Printing A particular
operation is dot does not
abnormal. print
constantly.
Printing isn't
performed
occasionally.
Rev. A
Table 5-9. Repair of M-4I60 Printer Mechanism (2)
Cause
CR does not move
smoothly.
The head FFC is
disconnected from
the head or MAIN
board.
The head FFC is
damaged.
The ink cartridge is
defective.
The head is
defective.
Ink is not ejected
straight or dot is
missing because of
ink viscosity.
The head FFC is
disconnected from
the head or MAIN
board.
The head FFC is
damaged.
The head is
defective.
Ink is not ejected
straight or dot is
missing because of
ink viscosity.
The head FFC is
disconnected from
the head or MAIN
board.
The head FFC is
damaged.
The head is
defective.
The ink cartridge is
defective.
Checkpoint
Move the CR manually and
check if the movement is
smooth.
Check if the tension of the
belt is appropriate.
Check if the PG is proper.
Check if the FFC is
connected to the head and
MAIN board.
Check if there is current
using the multimeter.
It might have been removed
and reinstalled several times
by the user. Therefore install
a new cartridge and run the
self-test.
Repeat cleaning at least 3
times and check if the
condition is improved. If not,
replace the head unit and
run
the self-test.
Repeat cleaning sequence
and run the self-test.
Check if the FFC is
connected to the head and
MAIN board.
Check if there is current
using the multimeter.
Repeat cleaning at least 3
times and check if the
condition is improved. If not,
replace the head unit and
run
the self-test.
Repeat cleaning sequence
and run the self-test.
Check if the FFC is
connected to the head and
MAIN board.
Check if there is current
using the multimeter.
Repeat cleaning at least 3
times and check if the
condition is improved. If not,
replace the head unit and
run the self-test.
Install a new cartridge and
run the self-test. (The
cartridge might have been
removed and reinstalled
several times by the user.)
Troubleshooting
Solution
Clean and lubricate the
CR guide shaft. (Refer to
Chapter 6.)
Replace the tension
spring or timing belt.
Adjust the PG. (Refer to
Chapter 4.)
Connect the FFC
securely.
Replace the head FFC.
Replace the ink
cartridge.
Replace the head unit.
Clean the head surface.
Connect the FFC
securely.
Connect the FFC
securely.
Replace the head unit.
Clean the head surface.
Connect the FFC
securely.
Connect the FFC
securely.
Replace the head unit.
Replace the ink
cartridge.
5-13