Brother DCP-L8400CDN Service Manual page 403

LCD
MAC XXC Internal temperature sensor
BT XXC Belt temperature sensor
TMP XXC External temperature sensor
HUM XXC External humidity sensor
DF Document detection sensor
DR First side document scanning
position sensor
AC ADF cover sensor
DB Second side document
scanning position sensor
Note:
If the external temperature/humidity sensor detects the unusual value, the machine displays
"NG" on the LCD.
(3) Check that the display on the LCD is changed when the detection condition of each
sensor is changed.
For example, insert paper through the registration front/rear sensor, open the front cover
or the back cover, remove the toner cartridge, make a jam at the paper outlet, insert paper
from the MP tray, set the paper tray, etc.
(4) Press the X key and finish this operation to return the machine to the initial state of the
maintenance mode.
■
Location of sensors
Process drive unit
Sensor names
Registration front sensor
Front cover sensor
Detection status (displayed/not displayed)
°
0 C (The value will not be changed since this
sensor is not installed.)
Without documents/With document
Without documents/With document
ADF cover closed/open
Without documents/With document
T1 paper feed sensor
Fig. 5-6
5-19
°
XX C/NG
°
XX C/NG
XX %/NG
Registration rear sensor
High-voltage power supply
PCB ASSY
External temperature sensor
External humidity sensor
Registration front/rear
sensor PCB ASSY
Paper feed unit
Confidential