Oki 2400 manual Connectors on

24xx

	FRU	Action
2	Logic Board	Remove Tractor 2 from the printer but leave the
		cable connected. Be 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:
		•	Be sure the slider and gear train are properly
			connected and move freely with the power
			off.
		•	Be sure the Tractor 2 board is receiving:
			+40 V dc on CN1-1 and +5 V dc on CN1-5.
		If not, check the cable connection and the
		voltages at logic board CN10-1. The upper
		right pin at CN10 is pin 1 (+40 V dc) and the
		pin just beneath it is pin 5 (+5 V dc).
		If these voltages are not present replace the
		logic board.
3	Tractor 2 Motor	Check the resistances of the Tractor 2 motor
	Board /Cable Asm	windings at CN5 on the Tractor 2 board. There
		should be 101 ± 5 ohms between pins:
			CN5 -1 and CN5 - 4
			CN5 -1 and CN5 - 6
			CN5 -2 and CN5 - 3
			CN5 -2 and CN5 - 5
		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 5-26.

2-34Service Manual