Troubleshooting; Motor And Sensor Troubleshooting - Epson Stylus CX7300 Service Manual

EPSON Stylus CX7300/CX7400/DX7400/NX200/TX200 series/SX200 series/Stylus CX8300/CX8400/DX8400/NX400/TX400 series/SX400 series Revision C

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 resistance and check point
Motor Motor Type
CR motor
DC motor with bras
PF motor
2-phase, 96-pole
Scanner motor
PM stepping motor
Note *1 : Manufactured by Oki Electric Industry Co., Ltd.
Manufactured by MITSUMI ELECTRIC CO., LTD.
Sensors
Table 3-2. Sensor check point
Sensor name Check point
PE Sensor CN24/Pin 1 and 2
TROUBLESHOOTING
Drive Voltage Resistance
±
28.8Ω 10%
21.2Ω ± 10%
DC 42V ± 5%
43.0Ω ± 10% *1
48.0Ω ± 10% *2
Signal level Switch mode
Less than 0.4V Off: No paper
More than 2.4V On: Detect the paper
or
Troubleshooting 60
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