When all the papers loaded in the cassette tray were used, the paper detect sensor flag drops on to the
base plate’s slit and light from the sensor flag gets blocked to alter the sensor’s output value. The printer
detects paper presence with this sensor’s output value.
When input sensor was not turned on within a certain time after one pickup roller rotation, the pickup
roller rotates once more. After 2 pickup roller rotation and paper cannot turn the input sensor on, the
machine determines it as paper jam or miss-feed and it is notified to the user.
Also, the machine does not have an automatic paper size detection sensor and it detects paper size with
Registration sensor’s on-off timing on feeding and when this detected paper size does not match with
the paper size set from PC, paper jam will occur as well.
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