Specifications

3
Flowcharts and TablesTroubleshooting
Table 4. Laser Scanner Failure
Step Check Result Action
1 Are connectors P12 and
P19 on the DC controller
board properly seated?
No Reconnect connectors P12 and P19
to the DC controller board.
2 Switch on the printer, wait
until the main motor stops
rotating, and connect a
multimeter between
connector P12-11 (/MOT
ON) on the DC controller
board and chassis ground.
Can you hear the scanner
motor start to spin?
No Go to Table 5, Scanner Assembly
Failure.
3 Switch off the printer,
connect a multimeter
between connectors P11-4
(GND, black wire) and
P11-5 (5 VB, yellow wire)
on the DC controller board,
and switch on the printer. Is
the voltage approximately
+5VDC?
No Replace the power supply.
4 Switch off the printer and
connect a multimeter
between connectors P11-5
(5 VB, yellow wire) and
P12-7 (5 VB, black wire) on
the DC controller board. Is
the resistance less than
5
Ω ?
No Go to Table 9, Toner Cartridge Sensor
Failure.
5 Switch off the printer and
connect a multimeter
between connectors P12-7
(5 VB) and P12-6 (GND) on
the DC controller board.
Does the voltage measure
+5 VDC when you switch
on the printer?
Ye s
No
Replace the laser/optic assembly.
Replace the DC controller board.