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Flowcharts and TablesTroubleshooting
Table 5. Scanner Assembly Failure
Step Check Result Action
1 Switch off the printer and
connect a multimeter
between connectors
P12-13 (24 V) and P12-12
(RTN) on the DC controller
board. Does the voltage
measure about +24 VDC
when you switch on the
printer?
No Go to Table 11, Power Supply Failure
(+24 VDC).
2 Connect a multimeter
between connectors P12-11
(/MOT ON) and P12-10
(GND) on the DC controller
board and initiate a service
test page. Does the voltage
drop to less than +1 VDC
during printing and rise to
about +4 VDC when the
printing stops?
Ye s
No
Replace the scanner assembly. If the
problem persists, replace the laser
and scanner motor cable.
Replace the DC controller board.
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