Specifications

Overview Miscellaneous - 10
Miscellaneous
Fuser Pressure Roller
The fuser pressure roller provides an opposing surface to
the fuser heater roller, the same function as in previous
laser printers. However in the LaserWriter 12/640 PS,
this pressure roller is seated in the chassis and is not a part
of the fuser assembly itself.
Power Supply Assembly
The power supply assembly is a large multifunctional
circuit board located in the lower section of the engine. In
addition to the DC power supply functions that are common
in previous engines, this assembly also houses some sensors
and switches, as well as the high-voltage power supply and
various other functions.