User manual

95.08.23.11.30
Color LaserWriter 12/600 PS Basics & Theory 1–111
When the registration position for the fourth color in the full-color
mode or the first registration position in the monochrome mode is
detected on the transfer drum, the mechanical controller turns on the
fuser assembly drive clutch (CL4). This transmits the rotation of the
main motor to the upper and lower fuser rollers, the fuser delivery
roller, the oil applying roller, and the oil pump.
The upper and lower fuser rollers each have one built-in fuser heater
(H1: 485W/100-120V; 430W/220-240V) that heats the roller. The
fuser temperature is detected by the thermistor (TH) at the center of the
lower roller surface. The thermoswitches are in contact with the
respective shafts of the upper and lower fuser rollers.
Thermistor
Lower Fuser Roller
Thermoswitches
Upper Fuser Roller