Ld Safety Switch; Front Door; Circuit - Ricoh U-C1 B051 Service Manual

LASER EXPOSURE

6.8.5 LD SAFETY SWITCH

Front Door

The LD safety switch is the interlock switch. This switch is on the upper end of the
front cover. This switch is linked to the following covers:
Front cover
Right cover
The switch prevents laser emission if any of the above covers is opened.

Circuit

The LD safety switch is on the 5V circuit leading to the LD unit. Between the switch
and the unit, the line has 2 contacts on the front door and on the right door (series
circuit). When either of the covers is opened, the power supply is interrupted,
preventing laser emission.
PSU
+5V
BICU
LD5V
Interlock
Switch
6-44
LD
Control
IC
26 July 2002
LDDR
B051D499.WMF