Ld Safety Switch - Ricoh R-C4 Service Manual

21 July 2006

6.6.3 LD SAFETY SWITCH

Front Cover Safety and
Right Cover Switches
SBCU
+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.
+5VS +5VS
IPU
6-37
LASER EXPOSURE
LDD:
LD Drive Board
PD
VCC
LD Driver IC
LD
Laser
Beam
Optical Path
OPC
Drum
B205D902.WMFF