Ld Safety Switches - Ricoh D109 Service Training

PSU
Slide 34

LD Safety Switches

Safety switches are installed at the front and right doors. The machine will cut
power to the LD drive board if either door is opened. The corresponding switch
cuts the power supply (+5VS) to the laser diode.
The safety switches are installed on the +24V line coming from the power supply
unit (PSU). The +24V supply must pass through these switches before
converting into the
LD Safety Switches
BICU
+5VE
+24V
GND
+5VS
REG
Front/Right Door
Switches
+5VS power that drives the laser.
34
+5VS
LD
LD
PD
PD
Vcc
M61880FP
LD Drive Board
S-C4L Training