Ricoh D109, Service Training

Page: 69 / 122

S-C4L Training
69
Slide 69
Hot Roller Drive
Hot roller Paper exit roller
Contact release
solenoid
Contact release gear
Main motor
Hot Roller Drive
Mechanism
ˆ
The main motor drives the hot roller through a gear train. One of the gears in the
gear train is the contact-release gear. This gear is linked to the contact-release
solenoid. When the contact-release solenoid is activated, it separates the
contact-release gear from another gear in the gear train.
ˆ
Drive power of the main motor is not transmitted to the hot roller.
ˆ
Drive power of the main motor is not transmitted to the paper exit roller. This
roller is driven by the exit motor.
Contact/Release Control
ˆ
The contact-release solenoid comes on at these times:
¾
When the copier warms the hot roller.
¾
When the hot roller temperature is 18
°
C or higher.
¾
Fusing idling (SP 1103 1) is set to "No."
ˆ
Control is based on these:
¾
The copier takes a shorter time to heat the hot roller when the roller isn’t
turning.
¾
The temperature of the hot roller surface may get uneven when the hot
roller temperature is low and the roller does not turn.