Development Unit Contact Mechanism; Contact Mechanism - Ricoh G108 Service Manual

DEVELOPMENT UNIT

6.5.4 DEVELOPMENT UNIT CONTACT MECHANISM

Contact Mechanism

[A]
[B]
[C]
[D]
S -B
TAND Y
Each development unit "slides" on rails located on the left and right sides inside the
printer. There is a spring located on each right rail, and another spring on each left
rail. Pushed by these springs, each development unit is forced away from the OPC
belt when it is not time to develop the latent image.
R S
IGHT IDE
The initial torque supplied to the development drive gear moves the right side of
the development unit towards the OPC belt (
L S
EFT IDE
There are four development solenoids [A][B][C][D] located on the left side of the
printer. There is one development solenoid for each development unit. When the
solenoid is activated, the lever of the solenoid [F] on the leftmost gear [G] is held
against the gear and the gear does not turn. This gear is on the same shaft as the
spring clutch [H]. Each spring clutch engages the toner return gear [I] on a
development unit.
When the machine starts development:
1. The drive power of the development motor is transferred to the development
roller ( 6.5.3). This roller drives the toner return gear [I].
2. The development solenoid [E] is energized. The lever [F] holds the leftmost
gear [G] from turning.
3. The spring clutch [H] stops when the leftmost gear stops. But the toner return
gear [I] keeps on turning.
4. The development unit then moves toward the OPC belt. (While this is occurring
on the left side of the development unit, the development drive gear is moving
the right side of the development unit also toward the OPC belt.)
5. The development roller contacts the OPC belt. (A black tab located on the left
front-side of the development unit keeps the unit from moving too far forward.)
G108
[E]
[F]
[G]
[H]
G108D905.WMF
6-20
[I]
6.5.3).
G108D906.WMF
SM