Oki ML421 Maintenance Manual - Page 30
This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC, -8VDC.
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Oki Data CONFIDENTIAL 2.1.9 Power Supply Circuit This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC, -8VDC. SW Noise filter AC Fuse circuit Transformer Power supply board Rectifier +50V Rectifier +12V Regulation Circuit Converter +5V Converter +50V Converter Control board -8V +5V +3.3V +42V The uses of output voltages and signals are described below. Voltage/signal +3.3V +5V +12V +42V +50V -8V 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 42113901 Rev.2 30 /
42113901
Rev.2
30 /
Oki
Data
CONFIDENTIAL
SW
AC Fuse
Noise
filter
circuit
Trans-
former
Power supply board
Control board
Rectifier
Converter
Rectifier
Regulation
Circuit
+50V
+12V
+5V
+5V
-8V
Converter
+3.3V
+50V
Converter
+42V
The uses of output voltages and signals are described below.
Voltage/signal
Use
+3.3V
USB Controller drive
+5V
Logic IC / LED drive
+12V
Serial interface line, FAN motor drive
+42V
LF motor / SP motor drive
+50V
Printhead, Option CSF motor drive
-8V
Serial interface line
2.1.9
Power Supply Circuit
This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC, -8VDC.