Sensor Circuit - Epson PH890 Service Manual

EPSON Stylus Photo 890/1290

2.2.2.5 Sensor Circuit

Stylus Photo 890/1290 has the following five sensors to detect printer's status.
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PE sensor
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ASF sensor
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Ink cartridge sensor (CSIC connector on the head board)
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Head thermistor sensor
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PF motor encoder
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CR motor encoder
The block diagram for the sensor circuit is as shown below:
Figure 2-29. Sensor Circuit Block Diagram
(C393MAIN/C393MAIN-C)
OPERATING PRINCIPLES
Figure 2-30. Sensor Circuit Block Diagram (C393MAIN-B)
Electrical Circuit Operating Principles
Revision B
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