Brother Facsimile Equipment MFC7420 - Manual (Page 63)

Confidential 3 - 1 8
3.2.3 Sensors and Actuators
Sensor name Sensor type Location
Cover sensor Mechanical switch Main frame L
Toner LED PCB (Light emission) Photo sensor Main frame R
Toner sensor PCB (Light reception) Photo sensor Main frame L
Paper eject sensor Photo sensor Main PCB
Regist front sensor Photo sensor Regist sensor PCB
Regist rear sensor Photo sensor High-voltage PS PCB
Tail edge sensor Photo sensor Regist sensor PCB
New toner sensor Mechanical switch Main frame L
ADF sensor PCB ASSY Photo sensor ADF unit
Sensors and Actuators Locations
ADF sensor PCB ASSY
Main frame R
Toner LED PCB
(Light emission)
Chute
Regist sensor PCB
Regist front sensor
Tail edge sensor
Cover sensor
New toner sensor
Regist rear sensor
Toner sensor PCB
(Light reception)
Main frame L
Paper eject sensor
Main PCB
ADF unit
High-voltage PS PCB
ADF front sensor ADF rear sensor