Electrical Component Defects
520
No. Sensor Name/
Sensor Board Name
Active CN No./
Pin No.
Condition Symptom
S31 ADF Registration Sensor L CN404/28 Open Jam P
Shorted
TH1 Pressure Roller Thermistor
(Edge:Rear)
A CN525/23 Open SC571
Shorted
TH2 Pressure Roller Thermistor
(Center)
A CN525/21 Open SC561
Shorted
TH3 Pressure Roller Thermistor
(Edge:Front)
A CN525/25 Open SC591
Shorted
TH4 Image Creation
Temperature Sensor
A CN526/4 Open SC497
Shorted
TH5 Fusing Thermistor (NC
sensor)
A CN525/27 Open SC581
Shorted
SW4 Right Cover Switch L CN559/19 Open “Cover closed” cannot be
detected.
Shorted “Open Cover” cannot be detected.
SW5 Tray Set Switch L CN543/15 Open Paper tray cannot be detected.
Shorted Paper tray is detected when the
paper tray is not set.
SW6 Waste Toner Bottle Set
Switch
L CN535/1 Open Waste toner bottle cannot be
detected.
Shorted Waste toner bottle is detected
when the waste toner bottle is not
set.
Fuse Location
100V (Mainly NA)
Fuse
Name
Connector (Out) Capacity Voltage Part No. Part Name Replaceable
FU1 CN611-1 (24V) 10A 250V 11071393 51MS(P)-100H
GF-009
No
FU2 CN610-1 (24VL) 10A 250V 11071393 51MS(P)-100H
GF-009
No
FU3 CN610-2 (24VL_LPS) 4A 250V 11071360 SCT4A No
FU4 CN611-3 (24V_LPS) 4A 250V 11071393 51MS(P)-100H
GF-009
No