Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 67

Paper Feed Problems
FRU
1 Tractor 2
Action
On the printer, make sure the gear that drives
Tractor 2 turns freely when the lever is not
pressed, but remain still when the lever is
pressed.
Remove Tractor 2 from the printer and remove
all paper. With the paper select lever in the
continuous forms position, press Line Feed;
the tractors should rotate.
Press the sub slider cam lever below the ASF/
Tractor 2 drive gear and press Line Feed again;
the tractors should not rotate but the drive gear
should.
Check the condition of the pin feed belts. With
the power off, make sure the slider does not
bind.
Verify:
• When the slider is to the rear, the white
gear drives the tractors;
• When the slider is to the front the gear
and tractors are not connected.
Remove the Tractor 2 cover and reinstall
Tractor 2 in the printer (if necessary remove the
printer covers also). Note that the small idler
gear just below the slider is held in place by the
cover; with the cover removed it will tend to
move off the stud. Also note that when
operating the Tractor 2 with the printer cover
removed, the Tractor 2 in-place sensor must be
held open.
Turn the printer on and look for mechanical
problems.
For information on the Tractor 2 cable
connectors, see "Tractor 2 Cable Connectors"
on page 5-4.
Diagnostic Information 2-43