Xerox Phaser 3450, Руководство по обслуживанию, Страница: 141 / 155

11-10
CIRCUIT DESCRIPTION
Service Manual
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
Item Specification
AC input voltage Europe America
minimum 198V 90V
optimum 230V 120V
maximum 264V 132V
max input AC current 2Arms 5Arms
max Inrush current 50 Ap-p (at 25 °C)
Line Regulation 24V ± 10%
5V ± 5%, 3.3V ± 5%
Ripple Noise 24V : 500mVp-p
5V : 100mVp-p
3.3V : 100mVp-p
Over Current Protect 24V : 5.0A
11.2.3.2 Power Supply Section of SMPS
Output Application Remark
+ 5V(DC)
Board Logic section of engine,
+ 3.3V(DC)
Panel, Video Controller Board & Video Controller board
LSU Laser
Main Motor, Solenoid, LSU Motor
+24V(DC) HVPS & lamp adjustment in the
printing section
AC Activates Lamp (print) Print
Input
(AC)
Output
(DC)