Epson Stylus DX9400F

Motors

The resistance values for the CR motor and the PF motor are given below, however, the values cannot be used to check the motors status since they are DC motor and the resistance between the electric poles varies. Visually check the motors for abnormal operation and if it is hard to judge, replace the motor.

Motor resistance and check point

Motor	Motor Type	Drive Voltage	Resistance
CR motor	DC motor with brush	DC 42V ± 5%	28.8Ω ± 10%
PF motor			21.2Ω ±10%
Scanner motor	2-phase, 96-pole PM stepping motor		43.0Ω ± 10%
ADF motor	PM stepping motor		20.0Ω ± 7%

Sensors

Sensor check point

Sensor name	Check point	Signal level	Switch mode
PE Sensor	CN24/Pin 1 and 2	Less than 0.4V	Off: No paper
		More than 2.4V	On: Detect the paper
ADF PE Sensor	CN25/Pin 1 and 5	0V	Off: Document not passing
		3.3V	On: Document passing
ADF DOC Sensor	CN25/Pin 1 and 3	0V	Off: Detect the document
		3.3V	On: No document