Read Sharp AR-651 (serv.man11) Service Manual online
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.
>
PS
<
Click on the first or last page to see other AR-651 (serv.man11) service manuals if exist.