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EPSON Stylus Scan 2500 Revision A
Troubleshooting Troubleshooting Motors and Sensors 74
3.4 Troubleshooting Motors and Sensors
Table 3-16. Motor Resistance and Measurement Procedure
Motor Name Location Check Point Resistance
CR Motor CN7 (MAIN board *)
Pins 1 & 3,
Pins 2 & 4
7.8 Ohms
±
10%
PF (Pump)
Motor
CN8 (MAIN board *)
Pins 1 & 3,
Pins 2 & 4
7.8 Ohms
±
10%
Table 3-17. Sensor Check
Sensor Name Location Signal Level Sensor Status
Paper End
Sensor
CN5/Pins 1 & 2 Close: more than 2.4V No paper
Carriage Home
Position Sensor
CN4/ Pins 1 & 2 Close: more than 2.4V
Out of home
position
ASF HP Sensor CN6/ Pins 1 & 2 Close: more than 2.4V
Out of home
position
Black Cartridge
Sensor
CN9/Pins 1 & 19 Off: more than 2.4V
Black cartridge
installed
Color Cartridge
Sensor
CN9/Pins
2 & 19
Off: more than 2.4V
Color cartridge
installed
Thermistor CN9/ Pins
2 & 19
Analog data
Change the VH
voltage of charge
pulse for common
driver circuit