2-8 Phaser 6300/6350 Color Laser Printer Service Manual
Laser Light Intensity Control
The Laser Unit in the Phaser 6300/6350 printer has four laser diodes: one each for
yellow, magenta, cyan, and black. The diode control circuitry adjusts the light
intensity for each color automatically. Image data is transmitted to the laser diodes in
the Laser Unit as digital signals. The laser diodes convert the image data from digital
signals to optical signals. The Laser Unit monitors and adjusts the intensity of the
laser beams to attain a stable electrostatic image.
The data path of image data is shown in the following figure.
s6300-043
Host (Electric Signal)
Printer Controller (Electric Signal)
Engine Control Circuit Board (Electric Signal)
Laser Unit (Laser Beams)
Electrostatic Latent On Drum
(Invisible Image)
Toner Image On Drum
Toner Image On Intermediate Transfer Unit
(IDT1)
Toner Image On Intermediate Transfer Unit
(IDT2)
Toner Image On Paper
Print Image On Paper
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