IV-34
(4) Sensors
No. Name Code Function
1 Paper Size Sensor PSU Photo sensor to detect the paper size.
2 Paper Feeding Sensor PT1
Photo sensor to detect when paper is
fed from the media cassette.
3 Paper Exit Sensor PT2
Photo sensor to detect that paper is
exited from the paper exit unit.
4 Paper Empty Sensor PE
Photo sensor to detect if paper is
loaded in the media cassette.
5 Oil Sensor OIL
Photo sensor to detect if the fusing
unit oil is empty.
6 OHP Sensor OHP
Photo sensor to detect if media in the
media cassette is an OHP.
7 Drum Jam Sensor DPJ
Photo sensor to detect if paper is
wound around the transfer drum.
8 Drum Encoder Sensor EN
Photo sensor to detect rotation of the
transfer drum.
9 Belt Sensor PBS
Photo sensor to detect the home
position of the OPC belt.
10 Toner Empty Sensor TPD/TTR
Photo sensor to detect if the toner is
empty for each toner cartridge.
11 Waste Toner Sensor WTS
Photo sensor to detect if the waste
toner bottle is full of toner.
12
Developing Photo
Sensor
DHP1,
DHP2
Photo sensor to detect the position of
the toner cartridge.
13 Cleaning Roller Sensor CRS
Photo sensor to detect if the fuser
cleaner is fitted in the fixing unit.
14
Temperature Sensor
for Fusing Unit
TH
Thermistor to detect the fuser
temperature.
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