Oki 24DX manual Fuser unit error Error 71, Error 72, Error, 148

4Fuser unit error (ERROR 71), (ERROR 72), (ERROR 73)

•Turn the power OFF/ON.

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• Does a fuser unit error occur immediately?

•	Yes Is the thermistor open or shorted?
	Measure the resistance between thermistor contacts.
	(About 220 kΩ at room temperature, 25°C)
	(See Chapter 7.3 for the measuring points.)
	•	Yes	Replace the fuser unit.
▼	A	No	Is a cable of the thermistor connected to "CN8" connector on the
•
			Power Supply Unit (High Voltage)?
			Is there any flaw on the cable of the thermistor ?
	•	No	Adjust the thermistor contact so as to touch the contact assembly
			properly.

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• Yes Does appear the heat-on signal at pin 6 (HEAT ON signal: 0 V in heater on state) of the POWER connector on the Main board?

		•	No	Replace the Main board.
▼	Yes	Replace the Power Supply Unit (High Voltage).
•
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•	No	Does a fuser unit error occur after more than 120 seconds from the power-on?
		•	No	Go to A
▼	Yes	Turn the power OFF/ON.
•

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• Is the heater of the fuser unit turned on? (When the heater is turned on, heat is radiated.)

• B	•	Yes	Is a cable of the thermistor connected to "CN8" connector on the
			Power Supply Unit (High Voltage)?
	•	No	Is a cable of the heater connected to "CN2" connector on "Power
			Supply Unit" (120V or 230V)

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To on the next page B .

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To on the next page A .

40930701TH DRAFT Vesion 148 /