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EN AC and DC power distribution 133
3
HP LaserJet 3100 and 3150 Series printer
The AC, DC, and high-voltage power supply circuits are all contained
within the ECU.
AC power distribution
The AC power circuitry supplies AC voltage whenever the power cord is
connected to the AC power source. The AC voltage is distributed to the
DC power supply circuitry and to the AC driver circuitry, which controls
AC voltage to the fusing assembly's heating element.
DC power distribution
The DC power distribution circuitry, located on the ECU, distributes +5
VDC and +12 VDC as follows:
+5 VDC: Formatter
Photosensors
DC-controller circuitry
Laser/beam-detect circuitry
+12 VDC: Motor
Scanner motor
Solenoid
+12VADC: High-voltage power supply