Epson 2070 - LQ B/W Dot-matrix Printer Service Manual page 128

Troubleshooting
2. Abnormal Paper Feed Operation 1
START
Dose
No
the PFmotor
rotate?
YES
When
No
the printer is
powered on,
is paper ejected
automatically?
YES
After
paper is
ejected, dose the
printer indicate
"Ready"?
YES
Is
somthing
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 C186
MAIN board.
5-6
Go to flowchart
2-1.
After
paper is
No
ejected, dose the
printer indicate
"Paper out"?
YES
Is the
release lever
frinction
mode?
No
YES
Is
something
jammed between
the front/rear PE sensor
and the platen ?
YES
Dose
the sensor
operated
correctly?
Clean the jam.
No
Is the
problem
corrected?
Is the
YES
problem
corrected ?
END
YES
END
Figure 5-3 Flowchart 2
Is
CN10
No
connected
correctly?
YES
Is the
resistance No
of the PF motor
coils correct?
YES
Replace the C186
MAIN Board
Are
No
No
CN5 and CN6
connected
correctly?
YES
Dose
the front and YES
rear PE sensor
operate
correctly?
No
No
Replace the sensor.
No
Is the
problem
corrected ?
YES
END
LQ-2070 Service Manual
Connect it
correctly.
Is the
No
problem
corrected?
YES
END
YES
Replace the
PF motor.
Is the
No
probelm
corrected?
YES
END
Connect them
correctly.
No
Is the
problem
corrected?
YES
END
Replace the C186
MAIN board.
Rev. A