Locations 5-7
4023-001
Symbol Name Function
PC2 Synchronizing Roller
Sensor
Detects the paper fed from the tray. Active:
“L”.
PC3 Paper Exit Sensor Detects paper ejection from the printer.
Active: “L”
PC4 1st Cassette Paper
Empty Sensor
Detects paper empty condition of the 1st
paper cassette.
PC5 1st Cassette Paper
Near Empty Sensor
Detects paper near empty condition of the 1st
paper cassette.
PC6 1st Cassette Set
Sensor
Detects that the 1st paper cassette is
installed in the tray 1. Active: “H”
- Double Feed Sensor Detects the possibility of double feeding on
the 1st paper cassette. Active: “L” (Detects
whether the leading edge of the paper to be
taken up next runs 10 mm or more from the
nip point.) The sensor is on the double feed
sensor board (PWB-H)
PC22 2nd Cassette Paper
Empty Sensor
Detects paper empty condition of the 2nd
paper cassette. Active: “L
PC23 2nd Cassette Side
Door Detecting
Sensor
Detects open/close condition of the 2nd
cassette side door. When it is opened, the
sensor output is “H”.
PC25 2nd Cassette Paper
Near Empty Sensor
Detects paper near empty condition of the
2nd paper cassette. Active: “L”
S1 Power Switch Turns power on and off.
S2 Right Door Interlock
Switch
Detects open/close condition of the right
door. When it is closed, the switch is ON.
S3 Right Door Switch Detects open/close condition of the right
door. When it is closed, the switch is ON.
S4 Toner Detection Plate
Read Switch
Checks the toner level by detecting the
position of the toner detection plate.
S5 1st Cassette Paper
Size Detect Switch
Detects the paper width of the 1st paper
cassette.
TH1 Fusing Roller
Thermistor
Detects the temperature of the upper fusing
roller.
TH2 I/C Thermistor Detects the temperature of the imaging
cartridge.
TS1 Fusing Roller
Thermostat
Shuts off the application voltage to the fusing
roller heater lamp (H1) when temperature
becomes abnormal.
TF1 Fusing Roller Heater
Lamp Fuse
Blows own fuse immediately to shut off the
application voltage to the fusing roller heater
lamp (H1) when temperature rises
abnormally.
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