HP 4600 Service Manual - Page 171
Drum phase calibration, Image stabilization control, - color laserjet toner cartridge
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Figure 5-31 Color registration calibration Drum phase calibration The drum phase calibration aligns all four cartridge motors and their drive gears. Image stabilization control This controls the variation of the image density caused by an environmental change or deterioration of the photosensitive drum, toner, etc. There are three types of image stabilization control. These controls operate when necessary. ■ Environmental change control: The environment condition sensor (HP Color LaserJet 4610n and 4650 models) controls the bias according to the environment conditions. ■ Image density control (D-max): the color misregistration sensor (PS12) calibrates the bias value when the image density is at max. ■ Image halftone control (D-half): The color misregistration sensor (PS12) calibrates the halftone data in the formatter. ENWW Image-formation system 155
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