Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual page 56

4227-300
FRU
2 Main Logic Board
3 Tractor 2 Motor
Board/Cable Asm
2-32
Service Manual
Action
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 back on. If the slider
does not move after turning the printer off and
then back 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 CN13-1.
The upper right pin at CN13 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 following resistances of the Tractor
2 motor windings:
101 ± 5 ohms between pins:
1 and 6, 3 and 6, 2 and 5, 4 and 5.
If the motor is good, replace the board/cable
assembly.
For more information on the Tractor 2 cable
"Tractor 2 cable
connectors, see
connectors" on page 6-15
.