Brother MFC-J2320 Service Manual page 285

LCD
Second side document scanning
*1
RB
position sensor
VT Head thermistor
T1 High temperature detector in the
complex IC (for main PCB)
*1 Duplex scanning models only
*2 Paper tray 2 models only
*3 MP tray models only
(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.
Head thermistor
Document
detection sensor
First side document
scanning position
sensor
MP paper
detection sensor
ADF cover
sensor
Document
Paper tray 2
scanner
detection sensor
sensor
Sensors
Registration sensor
Magenta ink
cartridge detection
sensor
Switchback sensor
High temperature detector in the complex IC
(for main PCB)
Locations of Sensors
Fig. 5-1
5-25
Sensing status (display/no display)
No document/Document present
Normal temperature/Abnormal temperature
Normal temperature/Abnormal temperature
Second side document
scanning position sensor
Purge cam sensor
Magenta ink
remaining sensor
Ink cartridge cover
sensor
Black ink cartridge
detection sensor
Yellow ink cartridge
detection sensor
Cyan ink cartridge
detection sensor
Black ink
remaining sensor
Yellow ink
remaining sensor
Cyan ink
remaining sensor
Confidential