Brother MFC-J6520DW

5-23
Confidential
(3) Change the detecting conditions (e.g., insert paper through the registration sensor,
open the ink cartridge cover or document scanner, or remove the ink cartridges),
and then check that the indication on the LCD changes according to the sensor
states.
(4) Press the X key to stop this operation and return the machine to the initial stage of
the maintenance mode.
Fig. 5-1
Document detection
Document scanning
Document scanner sensor
Registration sensor
Ink cartridge cover sensor
Purge cam sensor
ADF cover sensor
Black ink cartridge detection sensor
Yellow ink cartridge detection sensor
Cyan ink cartridge detection sensor
Magenta ink cartridge detection sensor
Black ink remaining sensor
Yellow ink remaining
Cyan ink remaining sensor
Magenta ink remaining sensor
Switchback sensor
Document width
Second side document
Head thermistor
High temperature detector in the complex IC (for main PCB)
scanning position sensor
sensor
sensor
sensor
position sensor