Troubleshooting Motors And Sensors - Epson STYLUS Scan 2500 Service Manual

EPSON Stylus Scan 2500

3.4 Troubleshooting Motors and Sensors

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