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24
DP-1510P/1810P
/1810F/2010E
JUL 2002
Edition 1.0
6. Interlock Safety Circuit
This safety circuit turns OFF the +24 VDC and +5 VDC supply voltages when the Front Door Cover is
opened. When the Front Door 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.
IN
OUT
GND
TA78M05F
MGND
L+5V
270
1W
270
1W
1W
270
MA152A
+24V
+24VD1
+24VM
LPC3 PCB
Q9
Front
Door
Micro
Switch
DC/DC
Converter
Interlock Safety Circuit Block Diagram
Printer Motor
Paper Feed Clutch
Bypass Paper
Feed Clutch
Lift DC Motor
2nd Paper Feed
Module
HVPS
LSU (Motor)
LSU (Laser)
Open Door
Detection