Lexmark 2380 - Forms Printer B/W Dot-matrix Service Manual page 65

10 Beeps and Blinking Ready, Paper, Font and Pitch LEDs
Tractor 2 home sensor never made after turning the printer off and then on,
or made at the wrong time.
(The same error indication is used for carrier home failure.)
FRU
1 Tractor 2
Home Sensor
2 Main Logic Board
3 Tractor 2 Motor
Board /Cable Asm
Action
Remove the Tractor 2 and turn the printer off
and then on again to determine if the fault is in
the printer or Tractor 2.
If the gear teeth chatter just before the beeps,
replace the home sensor.
Remove Tractor 2 from the printer but leave the
cable connected. Make sure the slider (the
black plastic piece just above the right cover)
moves after turning the printer off and then on.
If the slider does not move after turning the
printer off and then on:
• Make sure the slider and gear train are
properly connected and move freely with
the power off.
• Make sure the Tractor 2 board is
receiving:
+26 V dc on CN1-1 and
+ 5 V dc on CN1-5.
If not, check the cable connection and the
voltages at main logic board CN6-1.
The upper right pin at CN6 is pin 1 (+26 V dc)
and the pin just beneath it is pin 5 (+5 V dc).
If these voltages are not present replace the
main logic board.
Check the resistances of the Tractor 2 motor
windings: there should be 101 ± 5 ohms
between pins: 1 and 5, 3 and 5, 2 and 6 and
4 and 6. If the motor is good, replace the
board/cable assembly.
For information on the Tractor 2 cable
connectors, see "Tractor 2 Cable Connectors"
on page 5-4.
Diagnostic Information 2-41