Phenomenon
Condition
Cause
Level
Checkpoints and
Checking Method
Repair Method
6. Paper is not
fed.
Roll paper is not
fed, and printing
is repeated on
the same line.
(1) Roll paper feeding is
defective.
A
•
Verify that the specified roll
paper (width, thickness,
and diameter) is being
used.
•
Use the specified roll paper.
•
Verify that the roll paper is
loaded properly in the
paper supplying device.
•
Load the roll paper
correctly.
•
Tension:
≤
50g-cm
(2) A foreign substance is
attached to part of the power
transmission mechanism unit,
or any of the gears in the unit
are damaged.
B
•
Verify that no foreign
matter attached to any part
of the power transmission
mechanism unit and that
no gears are damaged.
•
If any foreign matter is
attached, remove it.
•
If any of the gears are
damaged, replace them.
(3) The paper feed motor is
damaged.
B
•
Check the resistance at
each coil of the
corresponding paper feed
motor
Resistance: Approx.
Resistance:
90
Ω±
10%
•
If any abnormality is found,
replace the paper feed
motor.
(4) The paper feed motor drive
signal is defective.
B
•
Verify that the
corresponding paper feed
motor drive signal is
normal.
•
If the drive signal is not
output or is not within the
specified range, adjust the
drive circuit.
7. The paper
feed pitch is
not uniform.
The line spacing
is not uniform.
(1) Roll paper is not being fed
correctly.
A
•
See Cause (1) of
Phenomenon 6.
•
Check the platen roller for
deformation.
•
If deformed, replace the
platen roller with a new one.
(2) The feeding load of a paper
roll exceeds the specification.
A
•
See Cause (2) of
Phenomenon 6.
•
The paper roll isn’t set
properly.
•
Reset the paper roll properly.
•
The paper roll doesn’t meet
the specification in size.
•
Use a paper roll which
meets the specification in
size.
(3) Paper is jammed in the paper
guide.
B
•
Paper is jammed in the
paper guide.
•
Remove paper. At this
time, use caution to
prevent damage to the
platen roller.
(4) The paper feed motor drive
signal is defective.
B
•
See Cause (4) of Phenomenon 6.
(5) The head up lever position is
not correct.
A
•
See Cause (1) of Phenomenon 4.
8. Paper end
detection is
not corrected.
Although paper
exists in the
paper guide
path, the out-of-
paper state
continues.
(1) The paper end detector is
defective.
B
•
Check the signal level on
the paper end detection
circuit board.
•
If the signal level is
abnormal, replace the
paper guide ass’y.
When paper is
removed from
the paper guide
path, the printer
does not enter
the out-of-paper
state.
(1) A piece of paper or foreign
substance is blocking the
paper path.
B
•
Verify that nothing is
blocking the paper path.
•
If anything is blocking the
paper path, remove it.
(2) The paper end detector is
defective.
B
•
See Cause (1) of Phenomenon 8.
