Epson TM-L90 series Service Manual page 19

Confidential
Recoverable errors
Table 2-4 Recoverable errors
Error
ERROR LED Blinking Pattern
Autocutter error
Approx. 5.12sec
Paper layout error
Roll paper cover open error
(when an error that can possibly
recover is selected) *1)
2-6 Troubleshooting Guide
Description
The autocutter does not work
correctly.
Label paper or the black mark is
not detected, or the paper
layout of the paper installed in
the printer and the setting of the
paper layout defined by the
GS ( E command do not match.
Printing is not performed
correctly due to a cover open
Remedy
Check to see if paper is jammed
around the autocutter. If so that,
remove the jammed paper. After
then close the roll paper cover,
turn it off, and then turn it on again.
Check for paper dust or foreign
particles attached to the
autocutter blade (See the section,
"Cleaning."in Chapter 5 for details
on how to remove these).
Check the cutter motor sub-
assembly. (see page 2-8.)
Replace the motor and the main
circuit board unit if the cutter
motor sub-assembly has been
shorted. (See page 3-39, 3-13.)
Replace the main circuit board
unit to see if the printer is repaired.
(See page 3-13.)
The printer is repaired, analyze the
defective part by referring to "Main
Circuit Board Unit Test Points".
(See page Appendix F-6.)
Replace the autocutter unit.
Confirm if the error happened by
the jammed paper while printing. If
so that, remove the jammed
paper. After then close the roll
paper cover, turn it off, and then
turn it on again
Perform the threshold value setting
for detectors. (See Chapter 4.)
Check if the label paper or the
black mark paper installed in the
printer is a cause of the problem.
Check if the paper layout of the
paper installed in the printer and
the setting of the paper layout
defined by the GS ( E command
match.
Check for paper dust or foreign
particles attached to the LED
holder assembly and the black
mark paper detector circuit board
assembly.
Replace the LED holder assembly.
Replace the black mark paper
detector circuit board assembly.
Close the roll paper cover, turn it
off, and then turn it on again.
if
Rev.B