Ld Safety Switch - Ricoh B039 Service Manual

LASER EXPOSURE

6.6.3 LD SAFETY SWITCH

Front/Right Cover
Safety Switches
R E G
IOB
+ 2 4 V
P S U
To ensure technician and user safety and to prevent the laser beam from
inadvertently switching on during servicing, there are safety switches at the front
and right covers.
When the front cover or the right cover is opened, the power supply to the laser
diode is interrupted.
The switches are installed on the +24V line coming from the power supply unit,
then the +5VLD is generated from the +24V supply after it goes through the
interlock switches.
B039/B040/B043
+ 5 V L D
BiCU
6-32
LDD:
LDD Drive Board
P D
V C C
LD Driver IC
L D
Laser
B e a m
Optical Path
O P C
D r u m
B039D906.WMF
SM