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1-8 Service Manual
5016-001
Operational Theory
Interlock Mechanism
When the front cover assembly, fuser cover or cartridge cover is
open, a CLOSE DOOR message displays indicating the interlock
system is open.
If the front door assembly or the fuser cover are closed, the door
switch actuator 3 [A] moves in the direction of arrow [B].
When the cartridge door is closed the door switch actuator 1 [C]
rotates in the direction shown by arrow [D] and activates the door
switch [E] and laser switch [F].
If either of these doors are not closed, actuator 1 [C] will not rotate
and the switches will not turn on.
When door switch [E] is not activated, it prevents the LVPS from
supplying power to the printer.
When the laser switch [F] is not activated, the engine board will not
turn the printhead on.