3.11.2 Case Open Sensor
This is case open sensor circuit. Case open sensor is a see-through sensor. The case opens
when the CASE SENS signal is low; the case closes when the CASE SENS signal is high.
3.11.3 Ribbon End Sensor
Ribbon end sensor is a see-through sensor.
1. There are 8 levels of adjustment tension to adapt different ribbons.
2. The REND SENS signal is high when there is ribbon inside; the REND SENS signal is
low when there is no ribbon.
3. The ribbon end tape should be transparent.
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