B245/B276/B277/B268/B269 Service Manual 18-Jan-06
253
The hot roller [L] takes a shorter time to become hot enough if it is not turning during warming
up. When, however, the fusing temperature (at the start) is low, the temperature of the
hot-roller surface may become uneven.
You can disable this control (
p.142).
Drive Release Solenoid
Solenoid Drive gear
Off Engaged
On Released
The fusing drive release solenoid [E] is on the rear end of the gear holder. When the solenoid
is off, the spring [D] pulls the gear holder, and the drive gear engages with the fusing unit
drive gear. When the solenoid is on, it pulls the top end of the gear holder to the right, and the
gear holder turns clockwise. As a result, the drive gear is released from the fusing unit drive
gear.
The release solenoid comes on when you turn on the main switch if the fusing temperature is
18C or higher. The solenoid releases the drive gear from the fusing unit drive gear. The fusing
lamps heat the hot roller [L] more effectively since the heat is not conducted to the pressure
roller [K]. When the hot roller becomes hot enough, the release solenoid turns off, letting the
drive gear engage with the fusing unit drive gear.
Fusing Entrance Guide Shift
The entrance guide [A] is adjustable for paper thickness to prevent creasing. The outer screw
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