Sensors; Cover Sensors; Toner Sensors - Brother mfc8440 Service Manual
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Also See for mfc8440:
- User manual (426 pages) ,
- Software user's manual (183 pages) ,
- Quick setup manual (52 pages)
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2.4
Sensors
2.4.1
Cover sensors
Detect opening and closing of the front cover.
2.4.2
Toner sensors
Detects if there is toner in the toner cartridge. The toner sensor at the left side emits light
through the window on the left side of the toner cartridge, then the toner sensor at the right
side receives it when the toner is low. They also detect whether or not the drum unit is
installed. (The toner cartridge is installed in the drum unit.)
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
Front cover sensor
Fig. 3-25
Toner sensor (Light emission)
Fig. 3-26
3-17
SERVICE MANUAL
Toner sensor
(Light reception)
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