Write Unit; Composition; Mechanisms - Konica Minolta 7020 Service Manual

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WRITE UNIT

[1]

Composition

LD drive board (LDB)
[2]

Mechanisms

Mechanism
Scan *
4
Light source
Positioning
* : Path of laser light
The light output from semiconductor laser is radiated
onto the opc drum via the collimater lens, cylindrical
lens 1, polygon mirror, fθ lens, cylindrical lens 2.
Cylindrical lens 1
Collimater lens unit
Polygon motor
Method
Polygon mirror
Rotational speed
Other than 7035/7135 : 33070.9 rpm
7035/7135 : 42519.6 rpm
Laser diode
• Output: Max. 5mW
• Wavelength: 780nm
Index sensor
Index mirror
fθ lens
Index mirror
LD drive board
(LDB)
Collimater lens unit
Cylindrical lens 1
fθ lens
Polygon mirror
2-D-1
WRITE UNIT
Cylindrical lens 2
Index lens
Dust-proof
glass
Index sensor board (INDEX)
Cylindrical
lens 2
Dust-proof glass Index lens
Index sensor
board
fθ lens
Polygon mirror
Cylindrical lens 2
Dust-proof glass
OPC drum