Epson Stylus D120 - 3.2 Troubleshooting Motors and Sensors

EPSON Stylus C110/C120/D120 Revision B
TROUBLESHOOTING Troubleshooting 44
3.2 Troubleshooting
3.2.1 Motor and Sensor Troubleshooting
 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.
Table 3-1. Motor Specification
Motor Motor Type Drive Voltage Resistance
CR motor
DC motor with brash DC 42V±5%
22.7Ω ± 10%
PF motor 21.2Ω ± 10%
Table 3-2. Sensor check point
Sensor name Check point Signal level Switch mode
Open Cover Sensor CN4 / Pin 1 and 2
Less than 0.4V Off: Case opened
More than 2.4V On: Case closed
PE Sensor CN3 / Pin 1 and 2
Less than 0.4V Off: No paper
More than 2.4V On: Detect the paper