Optical Path - Ricoh G133 Service Manual

6.3.2 OPTICAL PATH

The laser beams for black [A] and yellow [B] are directed to the upper part of the polygon
mirror [C]. Laser beams for magenta [D] and cyan [E] are directed to the lower part of the
polygon mirror [C].
The L2 lens [F] corrects the main scan line. Without this component, the line bends out
towards the middle of the main scan. The central bend of the L2 lens is adjusted in the
factory.
The speed of the polygon mirror depends on the selected mode and model (see below).
Resolution
Mode
(dpi)
600 x 600 (1
B/W
bit, 2-bit)
(except
OHP/Thick
600 x 600
paper)
4-bit
600 x 600 (1
Color
bit, 2-bit)
(except
OHP/Thick
600 x 600
paper)
4-bit
OHP/Thick 600 x 600 (1
1 to Thick 4 bit, 2-bit)
SM
Polygon
Process line
motor speed
speed (mm/s)
(rpm)
24,212 205
36,377 77
24,212 205
36,377 77
27,165 115
6-17
Laser Exposure
Print speed
Remarks
(ppm)
40 2 beams
17 -
40 2 beams
17 -
25 -
G133