Contact/Separation Mechanism - Ricoh B156 Service Manual

6.11.2 CONTACT/SEPARATION MECHANISM

FRONT VIEW
B156D047.WMF
Timing
When transferring toner to paper, the paper transfer roller unit contacts the image
transfer belt. At other times during printing, the unit stays away from the image
transfer belt. After printing, the unit contacts the belt and stays there.
NOTE: During standby mode, the unit stays away from the image transfer belt.
Mechanism
Fusing unit motor [A] → Gear → Paper transfer solenoid [C] → Cam [E] →
Contact/separation lever [D] → Paper transfer roller unit movement
The fusing unit motor [A] drives the mechanism. (It also drives the paper transfer
roller).
The cam [E] is controlled by the half-turn clutch [B] and the paper transfer solenoid
[C].
When the solenoid is off, it catches a hook on the surface of the half-turn clutch [B].
As a result, the high point of the cam pushes the contact/separation lever [D], and
the paper transfer roller unit is away from the belt.
When the solenoid is activated, the hook is released, so the half-turn clutch makes
a half-turn—the unit moves to the right and contacts the image transfer belt.
B156/B220
CÓPIA NÃO CONTROLADA
PAPER TRANSFER AND SEPARATION
[A]
[A]: Fusing unit motor
[B]: Half-turn clutch
[C]: Paper transfer solenoid
[D]: Contact/separation lever
[E]: Cam
6-62
CÓPIA NÃO CONTROLADA
[D]
[B]
[C]
REAR VIEW
[E]
B156D048.WMF
SM