Confidential
3-24
3.2.6 Sensors
Sensor name Type Located on
Regist front sensor Photo sensor High-voltage PS PCB
Regist rear sensor Photo sensor High-voltage PS PCB
Paper eject sensor Photo sensor Relay rear PCB
New toner sensor Photo sensor Relay front PCB
Toner LED PCB (Light emission) Photo sensor Frame R
Toner sensor PCB (Light reception) Photo sensor Frame L
Front cover sensor Mechanical switch Frame L
PE sensor Photo sensor PE EG sensor ASSY
Edge sensor Photo sensor PE EG sensor ASSY
MP PE sensor Photo sensor MP PE sensor ASSY
DX tray sensor Mechanical switch Relay rear PCB
Document front sensor 1 Photo sensor ADF
Document front sensor 2 Photo sensor ADF
Document rear sensor Photo sensor ADF
Switch back sensor Photo sensor ADF
Document cover sensor Photo sensor ADF
HP sensor Photo sensor Scanner unit ASSY
Fig. 3-26
Frame R
Toner LED PCB
(Light emission)
Toner sensor PCB (Light reception)
ew toner sensor (Relay front PCB)
High-voltage PS PCB
Regist rear sensor
Regist front sensor
MP PE sensor
PE EG sensor
Edge sensor
PE sensor
Paper eject sensor
(Relay rear PCB)
Frame L
Front cover sensor
DX tray sensor
Regist frame
HP sensor
Document rear sensor
Document cover sensor
Document front sensor 2
Document front sensor 1
Switch back sensor
ADF unit
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