2-30
Confidential
3.7 Location of Sensors
Name of sensor Type Position Function
Paper eject rear
sensor
Photosensor On the eject rear sensor
PCB ASSY in the paper
eject guide ASSY
The paper eject rear
actuator detects that
the paper passes
through the fuser unit
to check that no paper
jam occurs between
the heat roller and exit
roller 1.
Manual sensor Photosensor On the manual sensor
PCB ASSY in the front
chute ASSY
Detects if paper is
loaded on the
manual
feed slot
.
Top cover open switch Mechanical
switch
On the side frame R Detects open and
close of the top cover.
Back cover sensor Mechanical
switch
On the side frame L Detects open and
close of the back
cover.
Paper eject front
sensor (Fuser cover)
Photosensor On the eject front sensor
PCB ASSY in the side
frame L
The paper eject front
actuator detects that
the paper passes
through the heat roller
to check that no paper
winds around the heat
roller.
Registration front
sensor
Photosensor On the registration front/
rear sensor PCB ASSY
in the paper feed unit
Detects if paper from
the paper tray is
passing through and
detects the trailing
edge position of paper.
Registration rear
sensor
Photosensor On the registration front/
rear sensor PCB ASSY
in the paper feed unit
Adjusts the write start
position on paper.
New toner sensor Photosensor On the toner/new sensor
PCB ASSY in the side
frame L
Detects if a new toner
is mounted.
Toner LED
(Light emission)
LED
On the toner LED PCB
ASSY in the side frame R
Detects if plenty toner
remains.
Toner sensor
(Light reception)
Photosensor On the toner/new sensor
PCB ASSY in the side
frame L
Waste toner sensor Photosensor On the waste toner
sensor holder
Detects if waste toner
in the waste toner box
is almost full.
External temperature/
humidity sensor
Thermistor On the HVPS control
PCB ASSY in the side
frame R
Detects ambient
temperature and
humidity.
Internal temperature
sensor
Thermistor On the drum motor
origin sensor PCB ASSY
in the side frame L
Detects temperature
in the product (L side).
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