Specifications

Flowcharts and TablesTroubleshooting
Toner Cartridge Sensor Failure (Continued)
Step Check Result Action
2 Connect a multimeter
between pins P15-8 (5 VB,
yellow wire) and P15-9 (5 V,
orange wire) on the DC
controller board. When you
remove and insert the toner
cartridge, does the
resistance change from 0 Ω
(cartridge inserted) to
infinity Ω (cartridge
removed)?
No Replace the toner cartridge sensor
assembly.
3 Connect a multimeter
between pins P15-10 (EP
CHECK, red wire) and
P15-11 (GND, brown wire)
on the DC controller board.
When you remove and
insert the toner cartridge,
does the resistance
change from 0
Ω (cartridge
inserted) to infinity Ω
(cartridge removed)?
No Replace the toner cartridge sensor
assembly.
4 Remove the toner cartridge
sensor cover and observe
the toner cartridge sensor
PCB and actuator.
Does the actuator turn on
switches S101 and S100
when you install a toner
cartridge and turn off the
switches when you remove
the toner cartridge?
No Install a new toner cartridge. If
switches S101 and S100 still do not
turn on when you install the cartridge,
replace the toner cartridge sensor
assembly.
5 Is there continuity between
connectors P15 on the DC
controller board and P118
on the toner cartridge
sensor board.
Ye s
No
Replace the DC controller board.
Replace the high-voltage/toner
cartridge sensor cable.