Oki OKIPAGE 4w Maintenance Manual page 16

(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.
Toner
sensor
assy
Sensor
Manual feed Monitors whether paper was inserted into the manual feed sensor
sensor section.
Paper sensor Detects the leading part of the paper.
Monitors paper feeding.
Outlet sensor Monitors paper feeding and the paper size according to the paper
sensor arrival and passing time.
Toner sensor Detects the low toner status.
Outlet sensor
Heat roller
Transfer roller
Feed roller
Paper sensor
Hopping
roller
Manual feed sensor
Figure 2-2
Function
2 - 5
Exit roller
ON: Paper exists.
OFF: No paper exists.
ON: Paper exists.
OFF: No paper exists.
ON: Paper exists.
OFF: No paper exists.
ON (long): Toner low
OFF (short): Toner High
Sensing State