Oki 2400 manual Print Speed Service Check

24xx

	FRU	Action
6	Logic Board	If no problem is found with the other
		components, but the power problem still
		remains, replace the logic board and reset
		“Bidirectional Print Adjustment” on
		page 4-4.

Print Speed Service Check

The speed of the 24xx printers varies with the font, forms thickness setting and printhead temperature. Graphics output may print slowly due to data throughput limitations. Thermal sensing is built into the printhead on 249x printers and protects the printhead from overheating.

	FRU	Action
1	Head Gap Sensor	Check the function of the head gap sensor by
		turning the printer on with the Macro button
		pressed. Open the operator panel to the
		second level and do the following:
		• With the forms thickness lever at 1, Macro
		LED 1 lights.
		• With the forms thickness lever at 2 and 3,
		Macro LED 2 lights.
		• With the forms thickness lever at 4 through
		7, Macro LED 3 lights.
		Disconnect the head gap sensor from
		connector CN4 on the logic board. Place the
		forms thickness lever in position 1 and verify
		continuity at the following pin locations:
		CN4 - 1 and CN4 - 2
		CN4 - 2 and CN4 - 3
		Place the forms thickness lever in positions 2
		and 3 and verify continuity at the following pin
		location:
		CN4 - 1 and CN4 - 2
		Verify no continuity at forms thickness lever
		positions 4 through 7.

2-28Service Manual