Panasonic DP-3000 Technical Manual page 32

6. Interlock Safety Circuit
This safety circuit turns OFF the +24 VDC and +5 VDC supply voltages when the Printer Cover is
opened. When the Printer Cover is opened, the microswitch(es) on the ILS PC Board are de-actuated,
turning OFF +24 VDC to the Printer Motor Drive Circuit, the HVPS, the Paper Feed Solenoid Circuits,
the Clutch Drive Circuit, and the Laser Driver Circuit on the Laser Unit.
Right
+24VD1
Cover
Micro
Switch
+24VD2
Front
Cover
+24V
Q415
Q607
DC/DC
Converter
Open Door
Detection
Interlock Safety Circuit Block Diagram
LPC PCB
+24VM
+24VHL
MA152A
1W 270
TA78M05F
1W 270
IN
1W 270
GND
+
MGND
32
Printer Motor
Paper Feed Clutch
Lift DC Motor
Multi Feeder Feed Roller
Clutch
Counter
2nd Paper Feed Module
3rd Paper Feed Module
4th Paper Feed Module
Dual-Path Exit Guide Unit
Paper Transport Unit
HVPS
LSU (Motor)
L+5V
LSU (Laser)
OUT
+