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5. Sensors and switches (Explained with the SF-1120 and the SF-CM15)
For the ADU sensor, refer to page 5-18.
No.
Signal name Name Type Operation, function
1 TCS Toner density control sensor Transmission sensor HIGH when toner density falls.
2 ILSW Front cabinet open/close switch Interlock switch ON when closed.
3 MSW Power switch Seesaw switch
4 TH Fusing heater thermistor Thermistor Greater resistance at low temperature
5 TS Fusing heater thermostat Thermostat Contact open at abnormally high
temperature
6 POD Paper exit paper sensor Transmission photo sensor LOW when paper is present.
7 MHPS Mirror home position sensor Transmission photo sensor HIGH when paper is sensed.
8 MMRE Main motor encoder Transmission photo sensor Rotation pulse output
9 TFD Waste toner full switch Lead switch HIGH when sensed.
F LHPS Lens home position sensor Transmission photo sensor LOW when reduction.
G PPD Paper transport sensor Transmission photo sensor LOW when paper is present.
H 1 CSD0 ∼ 2 Body upper tray paper size detection (SF-1020 only) Tact switch Shorted when the switch is turned on.
I 2 CSD0 ∼ 2 Body lower tray paper size detection Tact switch Shorted when the switch is turned on.
J 3 CSD0 ∼ 2 Option upper tray paper size detection @1 Tact switch Shorted when the switch is turned on.
K 4 CSD0 ∼ 2 Option lower tray paper size detection @2 Tact switch Shorted when the switch is turned on.
L PED1 Body upper tray paper presence detection (SF-1020 only) Transmission photo sensor HIGH when paper is present.
M PED2 Body lower tray paper presence detection Transmission photo sensor HIGH when paper is present.
N PED3 Option upper tray paper presence detection @1 Transmission photo sensor HIGH when paper is present.
O PED4 Option lower tray paper presence detection @2 Transmission photo sensor HIGH when paper is present.
P Motor sensor 2 Body lower stage paper feed motor encoder sensor Transmission photo sensor Rotation pulse output
Q Motor sensor 3 Option upper paper feed motor encoder sensor @1 Transmission photo sensor Rotation pulse output
R Motor sensor 4 Option lower paper feed motor encoder sensor @2 Transmission photo sensor Rotation pulse output
S DPPD1 Body upper tray paper transport sensor Transmission photo sensor LOW when paper is present.
T DPPD2 Body lower tray paper transport sensor Transmission photo sensor LOW when the side door is open and
paper is present.
U DPPD3 Option upper tray paper transport sensor Transmission photo sensor LOW when the option door is open
and paper is present.
V DPPD4 Option lower tray paper transport sensor Transmission photo sensor LOW when the option door is open
and paper is present.
W PID Single manual feed paper entry sensor Transmission photo sensor HIGH when paper is present.
X OCSW OC cover open/close sensor Transmission photo sensor OC cover open/close detection
Y ORS Original size sensor Photo transistor Original size detection
Z DMS Drum mark sensor Reflection sensor Drum mark detection
[ IDS Toner patch density sensor Reflection sensor Toner patch density detection
@1: SF-CM15, SF-CM16 @2: SF-CM15 only
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