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Phaser 6121MFP Service Manual
Theory of Operation
Laser Unit
The Laser Unit in the Phaser 6121 printer has two laser diodes. The laser diode
control circuitry adjusts the light intensity for each beam automatically. Image
data is transmitted to the laser diodes in the Laser Assembly as digital signals. The
laser diodes convert the image data from digital signals to optical signals. The
Laser Assembly monitors and adjusts the intensity of the laser beams to attain a
stable electrostatic image. The Laser Assembly is replaced as a complete assembly.
Functional components within the Laser appear in the following.
Imaging Unit Exposure
The surface of the Imaging Unit is irradiated with laser light to form an
electrostatic latent image. The polygon mirror has four faces. The two-beam laser
array consists of two laser diodes arranged vertically. Two lines are scanned
through a single face of the polygon mirror.
s6121mfp-117
Semiconductor Laser
SOS Sensor
Polygon Mirror
G1 Lens
G2 Lens
SOS Mirror
Return Mirror
s6121mfp-118
Photo
Conductor
Polygon Mirror
Laser Diode
Beam A
Photo Conductor Surface
Beam B
Return Mirror
G2 Lens
G1 Lens
Summary of Contents for PHASER 6121MFP
Page 1: ...Phaser 6121MFP Multi Function Printer Phaser 6121MFP Service Manual...
Page 2: ......
Page 12: ...x Phaser 6121MFP Service Manual Contents...
Page 22: ...xx Phaser 6121MFP Service Manual...
Page 42: ...1 20 Phaser 6121MFP Service Manual General Information...
Page 106: ...2 64 Phaser 6121MFP Service Manual Theory of Operation...
Page 109: ...Phaser 6121MFP Service Manual 3 3 Error Messages and Codes s6121mfp 372...
Page 194: ...3 88 Phaser 6121MFP Service Manual Error Messages and Codes...
Page 306: ...6 44 Phaser 6121MFP Service Manual Adjustments and Calibrations...
Page 405: ...Phaser 6121MFP Service Manual 8 85 Service Parts Disassembly 3 Remove the spring s6121mfp 255...
Page 432: ...8 112 Phaser 6121MFP Service Manual Service Parts Disassembly...
Page 437: ...Phaser 6121MFP Service Manual 9 5 Parts List...
Page 477: ...Phaser 6121MFP Service Manual 9 45 Parts List...
Page 488: ...9 56 Phaser 6121MFP Service Manual Parts List...
Page 489: ...10 Chapter Wiring In this chapter Plug Jack Designations and Locator Diagrams Wiring Diagrams...
Page 530: ...1 6 Phaser 6121MFP Service Manual Index...
Page 531: ......