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LASER EXPOSURE
2.3.3 LD SAFETY SWITCH
Front Cover Safety and
Right Cover Switches
+ 5 V L D
IOB
+ 5 V
PSU
To ensure technician and user safety and to prevent the laser beam from
inadvertently switching on during servicing, safety switches are located at the front
and right covers. The switches are installed on the +5VLD line coming from the
power supply unit through the IOB and BICU boards.
When the front cover or the right cover is opened, the power supply to the laser
diode is interrupted.
+ 5 V L D
BiCU
2-32
LDD:
LD Drive Board
V C C
LD Driver IC
20 September 1999
L D
P D
Laser
B e a m
Optical Path
O P C
D r u m
A267D006.WMF
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