Laser/scanner assembly failure detection
The DC controller determines an optical unit failure and notifies the formatter of the error status when
any of the following occurs:
●
BD failure
◦
The BD signal is not detected within a specified period from when the laser/scanner starts
up.
◦
A specified BD interval is not detected within a specified period from when the laser/scanner
is ready.
●
Laser/scanner motor startup failure
◦
The scanner motor does not reach a specified rotation frequency within a specified period
from when the laser/scanner starts up.
◦
A specified BD interval is not detected within a specified period from when the laser/scanner
starts up.
●
Laser/scanner motor abnormal rotation
◦
The laser/scanner motor does not reach a specified rotational frequency within a specified
period during a print operation.
◦
A specified BD interval is not detected within a specified period during a print operation.
Safety
The laser/scanner assembly has a mechanical laser shutter. For user and service technician's safety, the
laser shutter interrupts the optical path of the laser/scanner assembly when the top door is opened
(SW101).
28 Chapter 1 Theory of operation ENWW
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