Reference Equation Processing; Development Bias Adjustment - Ricoh G157 Service Manual

TONER MASS AMOUNT CONTROL

6.3.4 REFERENCE EQUATION PROCESSING

The controller makes the following linear equations to adjust the development bias
for each color:
1. The three black rectangular images
[K ][K ][K ] (
1 2 3
the ID sensor.
2. The controller compares the signal levels
from the ID sensor and finds a linear
equation [L ].
K
3. The controller calculates the black
development bias that is appropriate to
realize the target ID sensor level.
NOTE: The sensor level decreases as the
black-image density increases.
4. The controller finds the cyan development
bias, the magenta development bias, and
the yellow development bias.
NOTE: The diagram shows the linear
equation of cyan [L
level increases as the cyan-image
density increases.

6.3.5 DEVELOPMENT BIAS ADJUSTMENT

Based on the examined equations this machine adjusts the development bias of
each development roller. If the machine does not make a linear equation, the
default voltage goes to the development roller.
G157
CÓPIA NÃO CONTROLADA
6.3.3) reflect the light from
]. The sensor
C
CÓPIA NÃO CONTROLADA
Sensor level
[K
2
Sensor level
[C ]
1
6-14
[K ]
1
]
Development bias
G157D912.WMFF
[C ]
3
[C ]
2
Development bias
G157D913.WMFF
[K ]
3
[L ]
K
[L ]
C
SM