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FS-1800/1800N | FS-3800/3800N
Interlock circuit
Figure 4-3-11 Interlock system
The interlock circuit is constituted by SW702, the top cover/paper feed unit interlock, and SW703,
the side cover interlock, both mounted on the sensor board. These switches are controlled by the
actuator which is mechanically activated by the projection on the top cover and the feed unit.
SW703 and SW702 are connected in series to the +24 V power. Physically opening the top cover,
side cover, or the paper feed unit will disconnect the +24 V power, signaling the status to the engine
board. The top cover switch (SW701) serves only the top cover.
Top cover
Side cover
Sensor board
Side cover
interlock
switch
(SW703)
Top cover/
feed unit
interlock
switch
(SW702)
Top cover
switch
(SW701)
Projection
Projection
Projection
Paper feed unit
Actuator
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