HP Color LaserJet CM1312 Series - Laser;scanner system

Laser/scanner system
The formatter sends video signals to the DC controller, which controls the laser/scanner. When the laser/
scanner system receives those signals, it converts them to latent images on the photosensitive drum.
Figure 5-7 Laser/scanner system
Laser failure detection
The optical unit failure detection sensor manages the laser/scanner unit failure-detection functions. The
DC controller identifies the laser/scanner unit failure and notifies the formatter if the laser/scanner unit
encounters the following conditions:
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Scanner motor failure
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BD failure
ENWW Laser/scanner system 81