Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual page 58

4227-300
Paper feed problems
FRU
1 Tractor 2
2-34
Service Manual
Action
On the printer, make sure the Tractor 2 driving
gear turns freely when the white sub slider cam
is not pressed. Be sure the driving gear does
not move when the sub slider cam behind the
gear is pressed.
Remove Tractor 2 from the printer and remove
all paper. With the paper select lever in the
continuous forms position, press LineFeed;
the tractors should rotate.
Press the sub slider cam below the ASF/
Tractor 2 drive gear and press LineFeed
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 sensor must be held
open.
Turn the printer on and look for mechanical
problems.
For more information on the Tractor 2 cable
"Tractor 2 cable
connectors, see
connectors" on page 6-15
.