5-14
Phaser 440 Color Printer
5
Theory of Operation
Power supply
The printer power supply is a combination power supply. It outputs the
following voltages:
■
+5 VDC generated from a chopper system. +5 VDC is used for the
digital logic systems.
■
±
12 VDC generated from a flyback converter system.
±
12 VDC is
supplied to the image processor board for specialized circuitry.
■
+24 VDC generated from the same
±
12 VDC flyback converter system.
+24 VDC is used for the 24 V motors.
■
+13.5 to 15 VDC generated from a forward inverter system. This
variable voltage supplies the power for the thermal head. The voltage
is varies based on several factors including: media selected, thermal
head temperature, and ambient temperature.
An externally accessible switch allows you to select from line voltages of
115 VAC and 220 VAC.