Sharp SF-2020 Service Manual page 17

5. Sensors and switches (Explained with the SF-2120 and the SF-CM15)
No.
Signal name
1 TCS Toner density control sensor
2 ILSW Front cabinet open/close switch
3 MSW Power switch
4 TH Fusing heater thermistor
5 TS Fusing heater thermostat
6 POD
Paper exit paper sensor
7 MHPS
Mirror home position sensor
8 MMRE
Main motor encoder
9 TFD
Waste toner full switch
F LHPS
Lens home position sensor
G PPD
Paper transport sensor
H 1 CSD0 ∼ 2
Body upper tray paper size detection (SF-2020 only)
I 2 CSD0 ∼ 2
Body lower tray paper size detection
J 3 CSD0 ∼ 2
Option upper tray paper size detection @1
K 4 CSD0 ∼ 2
Option lower tray paper size detection @2
L PED1
Body upper tray paper presence detection (SF-2020 only) Transmission photo sensor HIGH when paper is present.
M PED2
Body lower tray paper presence detection
N PED3
Option upper tray paper presence detection @1
O PED4
Option lower tray paper presence detection @2
P Motor sensor 2 Body lower stage paper feed motor encoder sensor
Q Motor sensor 3 Option upper paper feed motor encoder sensor @1
R Motor sensor 4 Option lower paper feed motor encoder sensor @2
S DPPD1
Body upper tray paper transport sensor
T DPPD2
Body lower tray paper transport sensor
U DPPD3 Option upper tray paper transport sensor
V DPPD4
Option lower tray paper transport sensor
W PID
Single manual feed paper entry sensor
X OCSW
OC cover open/close sensor
Y ORS
Original size sensor
Z DMS
Drum mark sensor
[ IDS
Toner patch density sensor
@1: SF-CM15, SF-CM16 @2: SF-CM15 only
29
30
31
1
27
23
11
24 25 26
Name
2 3 5 4 6
20 21 22
Type
Transmission sensor
Interlock switch
Seesaw switch
Thermistor
Thermostat
Transmission photo sensor LOW when paper is present.
Transmission photo sensor HIGH when paper is sensed.
Transmission photo sensor Rotation pulse output
Lead switch
Transmission photo sensor LOW when reduction.
Transmission photo sensor LOW when paper is present.
Tact switch
Tact switch
Tact switch
Tact switch
Transmission photo sensor HIGH when paper is present.
Transmission photo sensor HIGH when paper is present.
Transmission photo sensor HIGH when paper is present.
Transmission photo sensor Rotation pulse output
Transmission photo sensor Rotation pulse output
Transmission photo sensor Rotation pulse output
Transmission photo sensor LOW when paper is present.
Transmission photo sensor LOW when the side door is open and
Transmission photo sensor LOW when the option door is open
Transmission photo sensor LOW when the option door is open
Transmission photo sensor HIGH when paper is present.
Transmission photo sensor OC cover open/close detection
Photo transistor
Reflection sensor
Reflection sensor
3 – 6
7
10
28
8
9
12
16
13
17
14
18
15
19
For the ADU sensor, refer to page 5-18.
Operation, function
HIGH when toner density falls.
ON when closed.
Greater resistance at low temperature
Contact open at abnormally high
temperature
HIGH when sensed.
Shorted when the switch is turned on.
Shorted when the switch is turned on.
Shorted when the switch is turned on.
Shorted when the switch is turned on.
paper is present.
and paper is present.
and paper is present.
Original size detection
Drum mark detection
Toner patch density detection