Oki 4M - Manual (Page 19)

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Sensor Function Sensing State
Manual feed
sensor ON: Paper exists.
OFF: No paper exists. Monitors whether paper was inserted into the manual feed sensor
section.
Detects the leading part of the paper.
Monitors paper feeding.
Monitors paper feeding and the paper size according to the paper
sensor arrival and passing time.
Detects the low toner status.
Paper sensor
Outlet sensor
Toner sensor
ON: Paper exists.
OFF: No paper exists.
ON: Paper exists.
OFF: No paper exists.
ON (long): Toner low
OFF (short): Toner High
Exit roller
Outlet sensor
Heat roller
Transfer roller
Feed roller
Toner
sensor
assy
Manual feed sensor
Paper sensor
Hopping
roller
Paper feeding direction
Figure 2-2
(2) Sensors
The high-voltage power supply board consists of the high-voltage power supply circuit that
supplies power to the electro-photographic processor system and the photosensor that
detects a paper feeding system and toners.
Figure 2-2 shows the sensor layout drawing.