Kyocera FS-1050 Service Manual - Page 88

Interlock switch, Interlock switch

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Interlock switch The interlock switch is located on the high voltage board and opened and closed in conjunction with the front cover or the top cover via the interlock lever. This switch connects and disconnects the +24 V DC power supply line. If the front cover or the top cover is open, the interlock switch is open, and the +24 V DC to the high voltage output circuit, bias board, engine board, and the power supply board is disconnected, deactivating the high voltage output, laser output, main motor output for safety. The cooling fan is an exception: Since the cooling fan is directly fed with +24 V DC from the power supply unit at the primary side (+24V1) of the interlock switch, the cooling fan is not deactivated even the cover is open. Top cover Projection Interlock lever Projection Engine board, Bias board, etc. Power supply unit Triac, etc. High voltage output circuit +24V2 Interlock switch +24 V DC output +24V1 Cooling fan High voltage board Figure 4-3-11 Interlock switch Front cover Machine left side view 4-29 FS-1050

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4-29
FS-1050
Interlock switch
The interlock switch is located on the high voltage board and opened and closed in conjunction
with the front cover or the top cover via the interlock lever. This switch connects and disconnects
the +24 V DC power supply line. If the front cover or the top cover is open, the interlock switch is
open, and the +24 V DC to the high voltage output circuit, bias board, engine board, and the power
supply board is disconnected, deactivating the high voltage output, laser output, main motor output
for safety. The cooling fan is an exception: Since the cooling fan is directly fed with +24 V DC from
the power supply unit at the primary side (+24V1) of the interlock switch, the cooling fan is not
deactivated even the cover is open.
Figure 4-3-11 Interlock switch
Front cover
High voltage board
Power supply unit
Interlock
switch
Interlock lever
Projection
Projection
Top cover
Machine left side view
+24V1
+24 V DC
output
+24V2
High voltage
output circuit
Engine board,
Bias board,
etc.
Cooling fan
Triac, etc.