Power Supply Circuit - Oki ML421 Maintenance Manual

2.1.9 Power Supply Circuit

This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC, -8VDC.
SW
AC Fuse
The uses of output voltages and signals are described below.
Voltage/signal
+3.3V
+5V
+12V
+42V
+50V
-8V
42113901 Rev.2
Noise
filter
circuit
Trans-
former
Use
USB Controller drive
Logic IC / LED drive
Serial interface line, FAN motor drive
LF motor / SP motor drive
Printhead, Option CSF motor drive
Serial interface line
Oki Data CONFIDENTIAL
Power supply board
Rectifier
Rectifier
Converter
Regulation
Circuit
+5V Converter
+50V Converter
Control board
+50V
+12V
-8V
+5V
+3.3V
+42V
30 /