HP LaserJet Pro M402d

Laser/scanner failure detection
The DC controller determines an optical unit failure and noties the formatter of the error status for the
following supported conditions:
Failure detection function Supported feature
Beam detect (BD) failure detection: A specied BD interval is not detected within a
specied period during the scanner motor drive.
Yes
Laser/scanner motor startup failure: The scanner motor does not reach a specied
rotation frequency within a specied period of time from when the laser/scanner starts up.
Yes
Laser/scanner motor abnormal rotation: The laser/scanner motor does not reach a
specied rotational frequency within a specied period of time during a print operation.
Yes
Laser scanner failure detection A specied laser intensity is not detected. No
Safety
The laser/scanner assembly has a mechanical laser shutter. For the safety of users and service technicians,
the laser shutter interrupts the optical path of the laser/scanner assembly when the top door is opened
(SW101).
ENWW Engine laser/scanner system 17