Brother IntelliFax-3550 Service Manual page 30

Registration sensor actuator
Registration sensor (Photosensor)
(Main PCB)
Toner thermister
(On back of PCB)
Toner sensor
(Low-voltage power
supply PCB)
Hook switch sensor
(Microswitch)
Hook switch sensor
actuator
(Eraser lamp board)
Document front sensor actuator
Document front sensor (Photosensor)
(Relay PCB)
(Toner
sensor
PCB)
(Fixing unit)
(Document sensor PCB)
Location of Sensors and Actuators
Document rear sensor actuator
Document rear sensor
(Photosensor)
III – 11
Sheet feeder cover sensor actuator
Sheet feeder cover sensor
(Photosensor)
Cover sensor actuator
Cover sensor (Microswitch)
(High-voltage power
supply PCB)
Paper ejection sensor
actuator
Paper ejection sensor
(Photosensor)
Heater thermister