Epson Stylus Color 980 Service Manual page 64

EPSON Stylus Color 980
[Sensor circuit]
The sensors attached to the printer are as described in the following
pages. They are basically divided into 2 major parts: 1) abnormal
temperature detection part and 2) mechanism status detection part. The
former is controlled by the CPU and the latter is controlled by 2 ASICs;
E05B59 (IC2) and E05B60 (IC3).
Figure 2-13. Sensor Circuit Block Diagram (Abnormal Temperature Detection Circuit)
Operating Principles
1) Abnormal temperature detection part
This abnormal temperature detection part is composed of 3 thermisotrs
and the temperature detection circuit which is included in the nozzle
selector inside the printhead. The CPU's analog ports used for
temperature detection and their functions are as follows:
Electrical Circuit Operation Principles
Revision A
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