Brother HL-2700CN Service Manual page 85

(4) Sensors
No. No.
1 Paper Size Sensor PU
Registration Sensor
2
PU
3 Fuser Exit Sensor PU
4 Tray Empty Sensor PU
5 OHP Sensor PU
Toner Density Sensor
6
PU
Transfer Unit Sensor
7
PU
OPC Marker Sensor
8
PU
9 Toner Sensor PU
Waste Toner Sensor
10
PU
Temperature Sensor
11
for Fuser unit
Output Tray Full
12
Sensor PU
13 Toner Key Sensor PU
Room Temp.
14
Thermistor Sensor PU
No.
PSU Photo sensor to detect the paper size.
Photo sensor to detect the paper is fed
PT1
from the paper tray.
Photo sensor to detect that paper is
PT2
exited from the paper exit unit.
Photo sensor to detect if paper is
PEU
loaded or empty in the paper tray.
Photo sensor to detect that material in
OHP
the paper tray is OHP.
Photo sensor to detect the toner
TDS density of images formed on the
transfer belt surface.
Photo sensor to detect irregular
TBS
rotation of the transfer belt.
Photo sensor to detect the connecting
PBS
position of the OPC belt.
Photo sensor to detect if the toner is
TPD/TTR
empty or not for each toner cartridge.
WTS Photo sensor to detect that the waste
(LED/TR) toner bottle is full of waste toner.
Thermistor to detect the fuser
TH
temperature.
This is the sensor to detect that the
PFUL
paper exit tray is full of exited papers.
To detect the availability of key to be
TNK
provided to the toner cartridge..
Sensor to detect the ambient
RTS temperature of the printer setting
location.
IV-32
Function