Xerox Phaser 3450 Service Manual page 141

CIRCUIT DESCRIPTION
11.2.3 Engine/SMPS Section
SMPS(Switching Mode Power Supply) is the PWM(Pulse Width Modulation) method of power supply unit that supplies
DC+3.3V, DC+5Vand DC+24V to the engine and DC+3.3V, DC+5V to the video controller and the assembly panel. It also
supplies AC voltage to the heat lamp of the printing section.
11.2.3.1 SMPS Specification
Input
(AC)
Output
(DC)
11.2.3.2 Power Supply Section of SMPS
Output
+ 5V(DC)
+ 3.3V(DC)
+24V(DC)
AC
Service Manual
11-10
Item
AC input voltage
minimum
optimum
maximum
max input AC current
max Inrush current
Line Regulation
Ripple Noise
Over Current Protect
Application
Board Logic section of engine,
Panel, Video Controller Board &
LSU Laser
Main Motor, Solenoid, LSU Motor
HVPS & lamp adjustment in the
printing section
Activates Lamp (print)
Specification
Europe
198V
230V
264V
2Arms
50 Ap-p (at 25 °C)
24V ± 10%
5V ± 5%, 3.3V ± 5%
24V : 500mVp-p
5V : 100mVp-p
3.3V : 100mVp-p
24V : 5.0A
Video Controller board
Print
America
90V
120V
132V
5Arms
Remark