Oki 2400 manual Power Service Check

24xx

Power Service Check

	FRU	Action
1	Power Supply	If the carrier does not move to the left after
		turning the printer off and then on, be sure the
		line cord voltage to the power supply is correct
		and the power supply outputs are +40 V dc at
		CN12-1, +40 V dc at CN12-2 and +5 V dc at
		CN12-6.
		If the voltages are incorrect:
		• Check the internal fuse before replacing the
		power supply. Generally if F1 is blown, it is
		due to a short in the printhead; replace the
		printhead and the fuse before powering on
		again.
		• Be sure the power supply cable from the
		power supply to the logic board is not
		damaged and correctly installed.
2	Operator Panel	If there is still a power LED problem, check the
	Operator Panel	operator panel cable continuity and replace the
	Cable	cable or the operator panel.
3	Carrier Motor	Disconnect the carrier motor from logic board
		CN2 and turn the printer off and then on. If the
		power LED lights correctly only with the carrier
		motor disconnected, replace the carrier motor.
4	Paper Feed Motor	Disconnect the paper feed motor from logic
		board CN1 and turn the printer off and then on.
		If the power LED lights correctly only with the
		paper feed motor disconnected, replace the
		paper feed motor.
5	Printhead	Disconnect the printhead cable from the logic
	Printhead Cables	board and turn the printer on. If the power LED
		lights correctly only with the printhead cables
		disconnected from the logic board, there is a
		short in the printhead or printhead cables.
		Disconnect the printhead cable from the logic
		board and be sure none of the leads on the
		cable are shorted to ground.

Diagnostic Information 2-27