42114101 Rev.1
30 /
2.1.9 Power Supply Circuit
This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC and -8VDC.
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
+3.3C
USB Controller drive
+5V
Logic IC/LED drive
+12V
Serial interface line, FAN motor drive
+42V
LF motor / SP motor drive
+50V
Printhead and Option CSF motor drive
-8V
Serial interface line
Summary of Contents for ML490 Series
Page 1: ...42114101 Rev 1 1 135 ML490 491 PRINTER Maintenance Manual ODA...
Page 2: ...42114101 Rev 1 2...
Page 38: ...42114101 Rev 1 38 Drive gear Ink tank Ribbon cartridge Figure 2 6...
Page 48: ...42114101 Rev 1 48 Change arm Change lever Platen Release cam Figure 2 13 REAR TOP BOTTOM...
Page 96: ...42114101 Rev 1 96 9 Carriage Assy NK2 10 SUS Bearing portion of guide roller EM 30L B...
Page 119: ...42114101 Rev 1 119 6 8 9 7 1 2 3 11 10 4 5 Figure B 2 Printer General Assy...
Page 124: ...42114101 Rev 1 124 9 12 11 1 13 3 7 1 14 5 6 7 2 10 8 Figure B 4 Carriage Assy...