Epson STYLUS 4001968 Service Manual page 83

Manual
Table 5-7. Repair of Printer Mechanism (Continued)
Condition
Symptom
The carriage
moves, but no
Printing is not
printing is
performed.
performed.
A particular dot
is not printed.
A dot is not
printed
occasionally.
Abnormal
printing.
characters are
not aligned.
The intervals
between the
characters are
irregular.
Vertical line is
not aligned.
Paper is not fed
Paper is not fed.
normally.
Rev. A
Cause
Check the head cable for
The head cable is
disconnection.
disconnected.
Replace the printhead to
The printhead is
see if the printhead
defective.
operates normally.
See "Ink is not absorbed"
Ink absorption is
poor. on the previous page.
Perform the cleaning
operation.
is not clean.
The head cable is Check the head cable for
disconnection. disconnected.
The printhead is
Replace the printhead.
Check front of the
is not clean.
Check the ink cartridge for
The expiration of
the ink oartridge. expiration.
Cheek whether the cable
Insufficient
is properly plugged into
contact of the
the connector.
head cable.
Cheek the cleanliness.
Replace the printhead to
The printhead is
see if this causes printing
defective.
to be performed normally.
Check whether the used
Ink is lmorly
ink goes through the used
absorbed.
ink tube.
The paper gap is
Check the paper gap.
not adjusted.
Cheek that the timing belt
The timing bett is
is properly inserted into
defective.
the bottom of carriage.
Bidirectional Adjust the check it with
alignment is not
adjusted. program.
Foreign substance
Visually check the paper
are lodged in the
path.
paper path.
Paper feeding
gears are Visually check the gears.
defective.
The paper feed Measure the coil
motor is defective. resistance of the PF. motor. PF motor.
Troubleshooting
Checkpoint
Replace the
cable.,
Replace the
Clean.
Replace the
cable.
Replace the
Clean.
Replace the
ink cartridge.
Plug the oable
into the
properly.
Clean.
Replace.
See "Ink is not
absorbed".
Adjust the gap.
Set the timing
belt properly.
Adjust the
alignment.
Remove any
foreign
substance.
Replace
defective
gears.
Replace the
Solution
5-13