Ld Safety Switch - Ricoh B022 Service Manual

2.3.3 LD SAFETY SWITCH

Front Cover Safety and
Right Cover Switches
+ 5 V L D
S B C U
+5V
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 SBCU and IPU boards.
When the front cover or the right cover is opened, the power supply to the laser
diode is interrupted.
SM
+ 5 V L D
V C C
IPU
LD Driver IC
2-23
LASER EXPOSURE
LDD:
LD Drive Board
P D
L D
Laser
B e a m
Optical Path
O P C
Drum
B027D500.WMF
B022/B027