Phaser 6121MFP Service Manual 2-45
Theory of Operation
System Thermal Regulation
Fans are the primary means used to limit the rise in internal temperature. Three
fans are controlled by specialized circuity on the Main Board. The following
illustration shows the location and airflow direction of these fans.
Item Description
Output Tray Fan Cools the Scanner and output media.
Power Supply Fan Draws cool air across the Power Supply.
Ventilation Fan Recovers toner powder in the Imaging Cartridge and
exhausts the ozone produced to the outside.
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