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HP LaserJet 4000 - Page 103

HP LaserJet 4000
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EN
Power Supply System
5-15
The Scanner Motor is controlled and monitored by the Engine
Controller Board. It rotates the scanner mirror during the Initial
Rotation period and the print period.
The Fan Motor is controlled and monitored by the Engine Controller
Board. The Fan operates at full speed during the printing modes. The
Fan turns off in PowerSave mode after the Fuser cools down.

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