Epson FX-2170 Service Manual page 137

Troubleshooting
Table 5-8. Repairing the Printer Mechanism
Problem
CR operation is
abnormal.
The CR moves
slightly and then
^
The CR moves to
the left side (HP
side) and strikes
^
the frame of the
Printing is
abnormal.
The printer does
not print a
particular dot.
^
^
Printing is
uneven on both
^
edges of the
column.
The printed
^ result is too
light.
^
The PF motor
Abnormal paper
does not rotate at
feed.
5-16
Symptom Cause
A foreign object
is jammed
between both
terminals of the
HP sensor.
stops.
CN4 connector
removed from
the HP sensor.
The HP sensor is
defective.
printer.
Common wires
in the printhead
No image is FFC are
printed. disconnected or
there is no
continuity.
The printhead is
defective.
The printhead
FFC is
disconnected, or
there is no
continuity.
Platen
parallelism is not
adjusted
properly.
The printhead is
defective.
The platen gap is
too wide.
The PF motor is
defective.
all.
FX-2170 Service Manual
Checkpoint
Check the HP Remove the any
sensor. foreign object.
Check the Connect the CN4
connection of the correctly.
connector.
Check the Replace the HP
operation of the sensor.
HP sensor. Refer
to page 5-2.
Check the Replace the
common wires in printhead FFC.
the printhead
FFC.
Measure the coil Replace the
resistance of the printhead.
printhead. The
resistance
should be
approximately
16.4 ohms. Refer
to page 5-1.
Check the Replace the
continuity in the printhead FFC.
FFC.
Check the platen Adjust the platen
parallelism. parallelism.
Refer to page
4-2.
Check if the tip Replace the
of the dot wire is printhead.
worn.
Check the platen Adjust the platen
gap. Refer to gap properly.
page 4-2.
Measure the coil Replace the PF
resistance of the motor.
PF motor.
The value is
approximately 16
ohms.
Solution
Rev. A