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3. The scanner has a switching power supply which provides an output of
+5 V.D.C. for both the front-end video camera system and the Multibus card cage.
4. The scanner has three linear power supplies which provide outputs of +12 V and -12 V
for both the front-end video camera system and the Multibus card cage; +46 V for the
stepper motor driver; and +120 V for the illumination system.
3.1.9 Ventilation System
The logic boards, 100 Watt lamps, and power supplies produce significant amounts of
heat.
1. A series of vents in the left side cover of the scanner allow air to enter the scanner for
cooling purposes.
2. A metal mesh air filter covers the air intake vent.
3. The scanner uses three cooling fans, one mounted on the back panel of the scanner, one
mounted on the bottom of the card rack and another one on the top of the power supply
cover.