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22
1.1.8.
Interlock Safety Circuit
This safety circuit turns OFF the +24 VDC supply voltages when the Cover is opened. When the Cover is
opened, the microswitch(es) on the ILS PC Board are de-actuated, turning OFF +24 VDC to the Printer
Drive Circuit, the High Voltage Power Supply, and the Paper Feed Solenoid Circuits, turning OFF the +5
VDC supply voltage for the Laser Driver circuits on the Laser Unit.
opened, the microswitch(es) on the ILS PC Board are de-actuated, turning OFF +24 VDC to the Printer
Drive Circuit, the High Voltage Power Supply, and the Paper Feed Solenoid Circuits, turning OFF the +5
VDC supply voltage for the Laser Driver circuits on the Laser Unit.
+24V
LVPS
(Power Supply Unit)
+24V
+24V
Cover
+24VD
ILS PCB
Paper Feed Solenoid
Laser Unit
DC/DC
Converter
Rush Current
Protection Circuit
pMPOW
HVPS
(Power Supply Unit)
(Power Supply Unit)
Motor
(SC PCB)
+24VM
+24VM
+24VM
+24VM
L+5V
Interlock Safety Circuit Block Diagram
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