Ricoh FT8680 Service Manual page 26

PROCESS CONTROL
Section Characteristics Causes of Change
Drum Charge Potential Repeat Stress
Sensitivity
Residual
Voltage
Charge Charge Potential Dirtiness
Corona
Exposure Lamp Intensity
Mirror
Reflectivity
Lens Clearness
Development Amount of
Toner Charge
Measure the drum potential of a part
Temperature that was not exposed (Dark Potential)
Humidity with the potential sensor and adjust
the charge corona output.
Repeat Stress Measure the drum potential of a part
Temperature that was exposed (Light Potential)
Humidity and adjust the exposure lamp voltage.
Repeat Stress Measure the drum potential of a part
Temperature that was erased by the erase lamp
Humidity (residual voltage) and adjust the
development bias, light potential, and
dark potential
Measure the drum potential of a part
Temperature that was not exposed (dark potential)
Humidity and adjust the charge corona output.
Repeat Stress Measure the drum potential of a part
that was exposed (light potential) and
Dirtiness
adjust the exposure lamp voltage.
Repeat Stress Measure the reflected light intensity of
Temperature the ID sensor pattern and adjust the
Humidity toner density in the development unit.
2-2
31 July 1995
Compensation Method