Oki ML421 Maintenance Manual - Page 30

This power supply circuit supplies the +3.3VDC, +5VDC, +12VDC, +42VDC, +50VDC, -8VDC.

Page 30 highlights

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 /

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133

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.