Interlock Switch - Kyocera FS-1050 - B/W Laser Printer Service Manual

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.
Engine board,
Power supply unit
Triac, etc.
+24 V DC
output
Cooling fan
Top cover
Bias board,
etc.
High voltage
output circuit
+24V2
+24V1
High voltage board
Figure 4-3-11 Interlock switch
Projection
Interlock
switch
4-29
Interlock lever
Projection
Front cover
Machine left side view
FS-1050