Epson EU-T532 Technical Manual page 59

Confidential
Table 5-1 Troubleshooting
Phenomenon
Printing Nothing is
operation does printed.
not work.
Dots are missing
continuously.
Dots are missing
occasionally.
5-4 Repair
Condition Cause
(1) The head FFC
connection
failure
(2)The head FFC
signal line is
broken.
(3)Head input pulse
failure
(4)Head failure
(Dr.IC, etc.)
(1)Foreign matter is
attached to the
head heating
elements
(2)The head
heating
elements are
damaged.
(3)Head failure
(Dr.IC, etc.)
(1)Foreign matter
is on the surface
of the platen.
(2)The platen
surface is
deformed.
Level Where/how to check
A Check whether the
head FFC is connected
properly.
A See or check with an
oscilloscope whether
there is damage or
break of the head FFC.
B
Check with an
oscilloscope whether
the input pulse is within
the specified range.
B
A
See if anything is wrong
with the head heating
A
elements
B
Check with an oscillo-
scope if the input pulse
is within the specified
range.
A Check the surface of
the platen with an
oscilloscope or a
magnifier.
A
Procedure
Connect the head
FFC properly.
Replace the head
FFC if it is broken.
If the input pulse is
abnormal, replace
the control circuit
module.
If the input pulse is
normal, replace the
thermal head.
Clean the head
heating elements if
foreign matter
attached.
Replace the thermal
If the input pulse is
normal, replace the
thermal head.
Clean the surface of
the platen if foreign
matter is attached
to it.
Replace the platen
if there is any
damage on the
platen surface.
Rev. A