199
6.2.11. 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.
GND
Q40
FG
Discharge Plate
Bias Transfer Roller
Bias Charge Roller
Development Roller
Q39
Q38
HVPS
CPU
pCR0
pCR1
pTR0
CN53
3
4
GND
T
C
D
5
SC PCB
Toner
Cartridge
High Voltage Drive Circuit
Q41
pDRCK
2
nDRCK
nTR0
nCR1
nCRCK
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