Brother MFC640CW Service Manual page 77

Document front sensor
Document front
sensor actuator
Document front sensor
Document front
sensor actuator
PF encoder disk
PF encoder
sensor
(PF sensor PCB)
Registration sensor
Registration sensor actuator
Paper width sensor
(Hook switch PCB*)
Hook switch sensor*
Hook switch actuator*
Document rear sensor
Document rear sensor actuator
(Carriage PCB)
(Maintenance unit)
Document rear sensor
Document rear sensor actuator
(Lower cover)
Sensors and Actuators Locations
3-39
Purge cam switch
(Ink cartridge PCB
in the ink refill ASSY)
Scanner open sensor actuator
Scanner open sensor on the
rubber keypad
CR encoder strip
CR encoder sensor
(Head/carriage unit)
*MFC640CW
ADF & document
cover ASSY
Ink cartridge
sensors
Confidential