Brother DCP-8110DN Service Manual page 55

Part name
Toner sensor
New toner sensor
Document detection sensor
Document scanning position
sensor
ADF cover sensor
Internal temperature thermistor
Operation
Detects the toner remaining in the cartridge. When the toner
is below the specified level, the user is notified that the toner
cartridge needs replacing soon.
Detects the toner volume when a new toner cartridge is set.
(Does not react to the starter toner cartridge even if it is new.)
When a new toner cartridge is detected, the developer roller
counter and the developing bias voltage value are reset, and
the toner cartridge replacement counter increases by one.
Detects whether a document is set in the ADF.
Detects the scanning start position (Second side / First side).
Detects whether the ADF cover is open or closed.
Detects the temperature in the machine.
2-10
Confidential