Laser Optical Unit - Toshiba e-STUDIO556 Service Manual

3.9

Laser Optical Unit

3.9.1 General Description
When scanned images and print data are printed, the laser optical unit creates a latent image by
converting the digital image signals into laser beams and radiating them onto the photoconductive
drum.
The image signals are converted into a light emission signal of the laser diode on the laser driving
board (LDR1, LDR2), and are radiated on the drum through optical elements such as the cylinder
lenses, polygonal mirror and fθ lens. This unit must not be disassembled in the field because it is finely
adjusted and very sensitive to dust.
The laser unit with 2 beams is used only for the e-STUDIO756/856, and the 1-beam type for the e-
STUDIO556/656.
e-STUDIO556/656
[1]
e-STUDIO756/856
[1]
[1] Slit glass
[2] Polygonal motor
[3] Laser control PC board (PLG board)
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[2]
[3]
[2]
[3]
e-STUDIO556/656/756/856(Ver03)
OUTLINE OF THE MACHINE
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