Epson STYLUS PRO XL 4004677 Service Manual page 106

Stylus Pro Service Manual
Table 5-8. Repair of the Printer Mechanism (Continued)
Symptom Condition
The carriage
Printing is
moves, but no
not
printing is
performed.
performed.
A particular dot
is not printed.
A dot is not
printed
Abnormal
occasionally.
printing.
Printhead
characters are
not aligned.
The intervals
between the
characters are
irregular.
Vertical line is
not aligned.
Character or
Paper is not
dot pitch is
fed normally.
abnormal.
Rev.A
Cause
The head cable is Check whether the head
disconnected. cable is disconnected.
The head cable is Replace the head cable to
defective. see if operation is normal.
Replace the printhead to
The printhead is
see if the printhead
defective.
operates normally.
Ink absorption is See "Ink is not absorbed"
poor. on the previous page.
Printhead surface Perform the cleaning
is not clean. operation.
The head cable is Check whether the head
disconnected. cable is disconnected.
The head cable is Replace the head cable to
defective. see if operation is normal.
The printhead is
Replace the printhead.
defective.
Printhead surface Check the front of the
is not clean. printhead.
The ink cartridge Check whether the ink
is used up. cartridge is empty.
Check whether the cable
is properly plugged into
Insufficient head
the connector.
cable contact.
Check whether the
printhead is clean.
Replace the printhead to
The printhead is
see if this causes printing
defective.
to be performed normally.
Check whether the used
Ink is poorly
ink goes through the used
absorbed.
ink tube.
The platen gap is
Check the platen gap.
not adjusted.
Check that the timing belt
The timing belt is
is properly inserted into
defective.
the bottom of the carriage.
Bidirectional
Check it with bidirectional
alignment is not
alignment program.
adjusted.
Character or dot Check for head inclination,
pitch is abnormal. distance front/rear position.
Troubleshooting
Checkpoint
Reconnect the
head cable.
Replace the
head cable.
Replace the
printhead.
Clean.
Reconnect the
head cable.
Replace the
head cable.
Replace the
printhead.
Clean.
Replace the
ink cartridge.
Plug the cable
into the
connector
properly.
Clean.
Replace.
See "Ink is not
absorbed."
Adjust the gap.
Insert the
timing belt
properly.
Adjust the
bidirectional
alignment.
Make each
adjustment.
Solution
5-13