B245/B276/B277/B268/B269 Service Manual 18-Jan-06
221
LD Safety Switch
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.