Epson FX-2170 Service Manual page 127

Troubleshooting
2. Abnormal Paper Feed Operation 1
START
Does
the PF motor
rotate?
YES
When
the printer is
powered on, is
paper ejected
automatically?
YES
After
paper is
ejected, does the
printer indicate
"Ready"?
YES
Is
something
YES
stuck to the
surface of the
PW sensor?
Remove the substance
blocking the sensor.
YES
Is the
NO
problem
corrected?
YES
Replace the sensor.
END
NO
Replace the C166
MAIN board.
5-6
NO
NO Go to flowchart
2-1.
After
paper is
NO
ejected, does the
printer indicate
"Paper Out"?
YES
Is
something
jammed
NO
between the front/
rear PE sensor
and the
platen?
YES
Does
the sensor
Clear the jam.
operate
correctly?
NO
Is the
problem
corrected?
YES
END
Is the
problem
corrected?
YES
END
Figure 5-3 Flowchart 2
FX-2170 Service Manual
Is
CN10
NO
connected
correctly?
YES
NO
Is the
resistance
NO
of the PF motor
coils correct?
YES
Replace the C166
MAIN board.
Are
NO
CN5 and CN6
NO
connected
correctly?
YES
Does
the front and
YES
rear PE sensor
operate
correctly?
NO
NO
Replace the sensor.
Is the
NO
problem
corrected?
YES
Replace the C166
END
MAIN board.
Connect it
correctly.
Is the
problem
corrected?
YES
END
Replace the
PF motor.
YES
Is the
NO
problem
corrected?
YES
END
Connect them
correctly.
Is the
NO
problem
corrected?
YES
END
Does
the release
sensor operate
correctly?
YES
Rev. A