5-50
E3-01: Toner bottle motor rotation
When the toner bottle motor drives to the toner bottle position and the
toner bottle home position sensor is not detected.
Does the toner bottle motor rotate NO Bottle motor connector is shorted or broken
in manual toner addition mode? Bottle motor drive mechanism is defective.
YES Bottle motor is defective.
AC driver PCB is defective.
CPU PCB is defective.
Is DC5V detected on the bottle home NO Is DC5V detected on control panel CN401-13 ?
position sensor connector SN10-1 ? YES: Bottle motor home position sensor
connector is shorted or broken.
YES NO: Check all DC5V lines.
Does CN104-5 (signal of CPU PCB) NO Bottle motor home position sensor connector
or CN401-11 (of control panel CPU PCB) is shorted or broken.
change when the toner bottle home position Sensor mounting position is incorrect
. sensor is turned ON/OFF? Bottle motor home position sensor is defective.
YES Harness is defective. (between control panel
CPU and main CPU PCB)
CN401 is shorted or broken (on control panel
CPU PCB).
CPU PCB is defective.
E3-03: Toner density sensor gain
When the toner density gain is adjusted, toner density sensor standard signal level is not detected.
Is DC24V detected on toner density NO Check DC24V of CPU PCB CN7-7.
sensor connector CN-2 ?
YES
Is the toner density sensor signal NO Is DC24V detected on CPU PCB CN7-7 ?
detected on CPU PCB CN7-8 ? YES: Toner density sensor is defective.
YES NO: Toner density sensor connector is shorted
or broken.
Is toner density level standard NO Replace the developer material and re-adjust
(3.5% +/-0.5)? the toner density.
YES
CPU PCB is defective.
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