Laser Optical Unit - Toshiba e-STUDIO2330C Service Manual

9.

LASER OPTICAL UNIT

9.1 General Description
The laser optical unit radiates the laser beam onto the photoconductive drum responding to the digital
image signals transmitted from the scanner, USB, network, etc. to create the latent image. Image signal
is converted into the light emission signal of the laser diode on the laser driving PC board (LDR), then
radiated on the drum through the optical elements such as cylinder lenses, polygonal mirror and fθ
lens.
The unit must not be disassembled in the field as they are very sensitive to dust and finely adjusted at
the factory.
The polygonal motor in e-STUDIO3530C/4520C is different from the one in e-STUDIO2330C/2820C/
2830C/3520C, and rotates faster. In order to avoid effects by the consequently increased heat and
current, in e-STUDIO3530C/4520C, the driving PC board is placed outside the laser unit instead of
being unified with the polygonal motor.
Poligonal motor driving PC board
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e-STUDIO2330C/2820C/2830C/3520C e-STUDIO3530C/4520C
Fig. 9-1
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
LASER OPTICAL UNIT
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