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E3-21: Dust collection fan motor rotation
E3-22: Exhaust fan motor rotation
E3-23: Suction fan motor rotation
When the fan motor is rotated or stopped, fan motor rotation signal is/not detected.
Is DC24V detected on CN8-1, 2 or 7? YES Fan motor connector is shorted or broken.
fan motor is defective
E3-30: Discharge lamp
When the discharge lamp does not turn ON, or the fan motor fails to rotate when the
power switch is turned ON.
Is the discharge lamp ON? YES CPU PCB CN14-1 and 2 are shorted.
NO
Is DC24V detected on discharge lamp NO Check DC24V on CPU PCB CN14-2.
connector CN-2?
YES
Discharge lamp terminal position is incorrect.
CPU PCB is defective.
E3-40: Copy density sensor output adjustment
When the QRBAC* Function does operate, the white density output signal is not detected.
Is the copy density sensor dirty? YES Clean the copy density sensor.
NO
Does the copy density sensor connector NO Re-insert the sensor connector securely.
insert securely?
YES
Is the drum installed securely? NO Install the drum securely.
NO
Does the LED array light? NO Check the LED array connector is connected
YES correctly
Is DC5V detected on CPU PCB NO Check other DC5V line.
CN7-3 ? (QRBAC* function)
YES
Is voltage detected on CPU PCB NO Copy density sensor is defective.
CN7-2 ?
YES
Check all DC5V lines.
* QRBAC = Qualitative Reasoning Based Adaptive Controller.
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