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7.11.2. DOCUMENT SENSOR
The Sensor detects whether or not a document is in place.
When a document is detected, the shelter plate shuts off the sensor light, the photo-transistor turns OFF, and the input signal
of IC101-19pin becomes a high level. When there is no document, the shelter plate let the sensor light pass through, the photo-
transistor turns ON, and the input signal of IC101-19pin becomes a low level.
7.11.3. PAPER FEED SENSOR
The Sensor detects the front edge of the document.
When a document is detected, the switch turns ON, and the input signal of IC605-74pin becomes a low level. When there is no
document, the switch turns OFF, and the input signal of IC605-74pin becomes a high level.
Photo-transistor
Document Set
No Document
Read Position
Non Read Position
Signal (IC101-19pin)
OFF
High level
ON
Low level
Switch
Signal (IC605-74pin)
ON
Low level
OFF
High level
177
KX-FL513RU
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Troubleshooting
