Sharp AR-810 Manual de Serviço descarregar pdf (Página 112)

AR-651/810 LASER & OPTICAL UNIT 8 - 3

[CAUTION]

• Do not place reflective tools near the path of the laser beam.

• Take off your watches, rings, bracelets, etc. when handling the unit.

8. 2. Structure

(1) Laser emission Unit

This unit consists of the laser diode, finite focus lens and aperture.

a. Laser diode

This laser diode features low droop, small laser variation and low threshold current.

An aperture determines the shape of the laser beam at the laser emission position.

The laser diode radiates the laser beam responding to the laser emission control (ON/OFF) signals

from the laser drive board. The laser beam which passed through the finite focus lens are focused

on the drum surface.

b. Caution:

The beam of the semiconductor laser is very weak (about 5 mW), but focused parallel rays can

create enough energy to be hazardous.

Some material of the components of the laser optical unit are metal. Since the unit is in a sealed

container, there is no danger of laser leakage during normal operation.

Note: The laser beam is not visible. Pay the close attention when handling the laser unit components or

performing operations such as adjustment of the laser beam. This kind of operation, which can be

very dangerous, must be performed only by specially trained staff.

The warning label shown below is attached on the front side left inner cover.

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Sharp AR-810 Manual de Serviço Página 112