Auto density sensing
The cleaning blade removes any toner that remains on the drum after the transfer process. The toner that the
cleaning blade removes is collected inside the sealed PC cartridge.
#Part
1 Sensor shield assembly
2 Sensor (toner density)
The image density sensor assembly uses a
reflection
type sensor that detects a pre-placed toner patch and
image on the photoconductor (drum) and outputs pulses when the central line of the patch image aligns with
the central line of the detector. The sensor outputs pulses at the timing the patch image passes the sensor.
Therefore, observing changes of intervals at which pulses are output leads to toner density detection.
4062
Appendix C: Theory of operation
543
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