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2.6.2 Sensor Descriptions
The following table gives a brief description of each sensor and its function.
Code Name Detects Sensor Type
DS1 Document sensor 1 Presence of document in feeder Photo interrupter
DS2 Document sensor 2 Leading and trailing edge of
document
Photo reflector
DS3 Document sensor 3 Leading and trailing edge of
document backside
Photo reflector
DRS Document resist sensor Detect timing for document resist
ration
Photo interrupter
DEXIT Document exit sensor Detect document discharge Photo interrupter
HS Mirror carriage home
position sensor
CIS position Photo interrupter
APS ADF permission sensor ADF ready Photo interrupter
TXIL Interlock switch Scanner cover open or close Photo interrupter
FCOVER
(FRNT_OP)
Front cover switch Detects front cover is open or
close
Photo interrupter
PES
(PES1)
Paper empty sensor Detects presence of recording
paper in the first paper
cassette
Photo interrupter
PDS Paper discharge sensor Detects paper pass at paper exit Photo interrupter
PRS Paper resist sensor Detects paper registrant timing Photo interrupter
SWBK Switchback sensor Detects paper switching back at
paper exit area at duplex printing
Photo interrupter
OPEN
(CAS1)
Paper cassette open
sensor
Detects the first paper cassette
open or close
Photo interrupter
TOS_TC Toner sensor Detects toner empty at toner car-
tridge
Photo interrupter
TOS_DC Toner sensor Detects toner empty at drum car-
tridge
Photo interrupter
TRAYS
(PESM)
Tray sensor Detects presence of recording
paper in the bypass tray
Photo interrupter
JAMC
(SIDE_OP)
Jam access cover sen-
sor
Detects the side cover open or
close
Photo interrupter
TEMP Temperature Detects temperature and humidity
TH1
(TH_F)
Thermistor 1 Fuser thermistor
INTRLCK Inter lock Interlock switch for printers Mechanical Switch
HP
*1
Home Position Detects position of the shift unit. Photo interrupter
*1: MFX-3595 only
PES OP
(PES2)
Paper empty sensor Detects presence of recording
paper in the 2nd paper cassette
Photo interrupter
OPEN OP
(CAS2)
Paper cassette open
sensor
Detects the 2nd paper cassette
open or close
Photo interrupter
JAMC2
(JAM2_OP)
Jam access cover
sensor
Detects the 2nd paper cassette
side cover open or close
Photo interrupter