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AR-BC320 EXTERNAL VIEW AND INTERNAL STRUCTURE 6 - 9
H. PWB 1
25
No. 1 cassette paper feed detection
Detects paper exit from No. 1 paper tray.
PFD1
Photo sensor (Photo
transmission)
26
Manual feed paper width detection
Detects the paper width.
MPWS
Volume (Variable
resistor)
27
No. 1 cassette lift-up upper limit detection Detects the upper limit position of paper.
LUD1
Photo sensor (Photo
transmission)
28
PS front sensor
Detects paper in front of PS.
PPD2
Photo sensor (Photo
transmission)
29
No. 1 cassette paper empty detection
Detects paper empty on the paper tray.
PED1
Photo sensor (Photo
transmission)
31
Belt lift-up upper limit detection
Detects lift-up or lift-down of the transfer belt.
BLUD
Photo sensor (Photo
transmission)
32
Belt waste toner full detection
Detects belt waste toner full.
BTNF
Contact switch
33
Color toner concentration (process
control) sensor/Auto image Reg.
Detects the toner patch density (color toner) in image density
correction operation. 2-sensors on PWB.
PCS_C
Photo sensor (Photo
transmission)
34
Lower heat roller thermistor
Detects the temperature on the heat roller surface.
THSD
Thermistor
35
Lower heat roller thermostat
Detects an abnormally high temperature and turns off the heater lamp. HLTS2
Thermostat
Thermal switch
36
Machine paper exit sensor 1
Detects discharged paper.
POD1
Photo sensor (Photo
transmission)
37
Upper heat roller thermistor
Detects the temperature on the heat roller surface.
THSU
Thermistor
38
Upper heat roller thermostat
Detects an abnormally high temperature and turns off the heater lamp. HLTS1
Thermostat
Thermal switch
39
Main switch
Turns ON/OFF the main power.
MSW
Seesaw switch
40
Front door open detection
Detects open/close of the front door.
DSWF
Micro switch
41
Paper exit door open detection
Detects open/close of the paper exit door.
DSWL
Micro switch
42
Face-up paper exit tray full detection
Detects full of the face-up paper exit tray.
TFD
Photo sensor (Photo
transmission)
43
Machine paper exit sensor 2
Detects discharged paper.
POD2
Photo sensor (Photo
transmission)
44
Black toner concentration sensor
Detects black patch density for toner concentration
PCS_B
—
No.
Parts
Code, signal
name
Type
Name
Function
1
2
5
6
3
4
8
7
9
10
12
11
13
14
Front / right side / top view
Summary of Contents for AR-BC320
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