Epson DFX-9000 Revision B
Operating Principles Printer mechanism 76
2.2.6.2 Cooling fans
The four fans, 1 on the left side frame and 3 on the right side frame,
prevent the inside temperature of the printer from rising too high.
Each of the fan motors has a rotation detection sensor that outputs a
pulse signal. If a fan is not rotating, the output signal stops cycling, and
the signal stays either High or Low. When the controller detects this
condition, it shuts off the +42 V supply, and all fan motors and printing
operations stop.
Figure 2-19. Cooling Fan
FAN1 Motor
FAN2 Motor
FAN3 Motor
FAN4 Motor
Left Side Frame
Right Side Frame
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