Epson LQ-2170 Service Manual page 128

Troubleshooting
2. Abnormal Paper Feed Operation 1
START
When
the printer is
powered on, does
the CR motor
rotate?
YES
Does
the CR motor
stop during or after
initialization?
YES
When
you move the CR
manually with the
power off, does it
move freely?
YES
Replace the oil pad mounted on
the CR assembly. Clean the CR
shaft, and lubricate the oil pad
and the surface of the CR shaft.
Is CN4
NO
connected
correctly?
YES
NO
Does the
HP sensor work
correctly? See
Table 5-2.
YES
NO
5-6
NO
NO
Replace the
C166 MAIN
board.
NO
Is the
platen gap
NO
adjusted
Adjust the gap properly.
properly?
Refer to Chapter 4.
YES
NO
END
Connect CN4
correctly.
Is the
YES
problem
corrected?
NO
Replace the
HP sensor.
Is the
YES
problem
corrected?
Figure 5-3 Flowchart 2
Is CN11
NO
connected
correctly?
YES
Check the resistance
of the motor coils.
See Table 5-3.
YES NO
Is it
OK?
Replace
the CR
motor.
END
Is the
YES
problem
corrected?
Is the
resistance for
the CR motor correct?
See Table 5-3.
Replace the C166
MAIN board.
END
LQ-2170 Service Manual
Connect
CN11
correctly.
Is the
NO
problem
corrected?
YES
END
NO
Replace the
CR motor.
YES
Is the
NO
problem
corrected?
YES
END
Rev. A