Epson EU-T532 Technical Manual page 60

Confidential
Table 5-1 Troubleshooting
Phenomenon Condition
Printing is faint. All printing color is
faint.
All or some part
of printing is faint.
Printing is partly
faint.
Abnormal or Abnormal or
incorrect incorrect printing
printing
Paper cannot Paper cannot be
be inserted. inserted into the
printer module.
Rev. A
Cause Level
B
Printing density
setting is set to light.
(The color sensitivity
difference
depending on the
paper)
(1)Dirt or foreign A
matter attaches
to the head
heating
elements.
(2)Thermal A
sensitivity has
deteriorated
due to paper
deterioration
(3)Thermal head B
heating
elements are
defective.
Damage or A
deformation of the
platen surface
(1)Thermal head B
input pulse
failure
(2)Thermal head B
failure
(Dr.IC, etc.)
(1)Paper chips or A
foreign matter is
in the paper
guide of the
printer module.
(2)Paper detector B
on the paper
guide of the
printer module is
defective.
(3)The shape of the A
paper edge is
not like the
specified one.
EU-T532/T542 Technical Manual
Where/how to check
•Check the printing
density setting of the
control circuit module.
•Check if the specified
paper is used.
See or check the head
heating elements with
a magnifier.
Check whether the
paper has
deteriorated.
Check the surface of
the thermal head with
a magnifier.
See or check with a
magnifier the platen
surface.
Check with an oscillo-
scope if the input pulse
is within the specified
range.
Check whether paper
chips or foreign matter
is inside the paper
guide.
Check if the detector
operates properly.
Check if the paper
edge is cut properly.
Procedure
Change the setting
of the printing
density to darken.
Clean the head
heating elements if
foreign matter is
attached to the
elements.
Replace the
deteriorated paper.
Replace the thermal
head.
Replace the platen
if the platen surface
is damaged or
deformed.
If the input pulse is
abnormal, replace
the control circuit
board.
If input pulse is
normal, replace the
thermal head.
Remove paper
chips or foreign
matter if there is
any.
•Remove paper
chip or foreign
matter if there is
any.
•Replace the
detector if it is
damaged.
Cut the paper edge
properly.
Repair 5-5