User guide

88 Chapter 4 - Operational overview EN
Power system on ECU
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. AC voltage is distributed to the
DC power supply circuitry and to the AC driver circuitry, which
controls AC voltage to the fuser assembly heating element.
DC power distribution
The DC power distribution circuitry, located on the ECU, distributes
+3.3 Vdc, +5 Vdc, +24 Vdc, and +32 Vdc as follows:
 +3.3 Vdc: Formatter
Laser/beam detect circuitry ECU
Photo sensors
ADF sensors
Control Panel
 +5 Vdc: Formatter
ECU
Laser/beam detect circuitry
 +24 Vdc: Printer paper path motor
Exhaust fan
Laser/scanner motor
Solenoid
Formatter (routing only)
High-voltage power supply
Fuser safety circuit
CCD
 +32 Vdc: ADF motor
Scanner motor
Formatter (routing only)