When the recording paper is loaded on the print head or the recording paper cover is opened, the paper top sensor SW turns ON, and the input signal of IC501-21 pin (Digital Board) becomes a low level. Usually, the SW turns OFF, and the input signal of IC50121 pin (Digital Board) becomes a high level.
SW Set recording paper or paper cover is opened No recording paper or paper cover is closed ON OFF
Signal (IC501-21 pin) Low level High level
6.5.4.
Cover Open Sensor (SW1001)
When the u-TURN BLOCK is closed, the SW becomes ON, and the input signal of IC501-131 pin (Digital Board) becomes a low level. When the cover is opened, the SW becomes OFF, and the input signal of IC501-131 (Digital Board) pin becomes a high level.
