Epson 890N Service Manual - Page 50

C524 PSB/PSE/PSH Power Supply Circuit, Power Supply Circuit Block Diagram - fx specs

Get Epson 890N - FX B/W Dot-matrix Printer PDF manuals and user guides
UPC - 010343850019
View all Epson 890N manuals
Add to My Manuals
Save this manual to your list of manuals

Page 50 highlights

EPSON FX-890/2190 2.1.2.2 C524 PSB/PSE/PSH Power Supply Circuit This printer can be powered by one of the following three power supply boards: the C524PSB (120 V) board, the C524PSE (230 V) board, or the C524PSH (Universal) board. The function of the boards is the same, except for a difference in the primary circuitry. The power supply outputs the DC current necessary to drive the printer control circuit and drive the mechanism. CIRCUIT CONSTITUTION Figure 2-6 below shows the block diagram of this power supply circuit. Figure 2-6. Power Supply Circuit Block Diagram Block Input Filter ZC-RCC Converter +5 V Circuit Table 2-3. Circuit Constitution Description † Inrush current preventive circuit with a power thermistor † 42 V zero cross RCC of high performance † Constant-voltage detecting circuit of Tr+ZD type † Low power standby mode function by the ESAVE signal is supported † Chopper circuit with a MOSFET discrete structure Revision B INPUT SPECIFICATIONS Table 2-4. Input Specifications Power Supply Unit Name Rated input power voltage C524 PSB (100-120V Spec) 100-120 VAC C524 PSE (220-240V Spec) 220-240 VAC C524 PSH (100-240V Spec) 100-240 VAC Input voltage range 85-138 VAC 187-276 VAC 85-276 VAC Rated input power frequency Input frequency range 50-60 Hz 47-63 Hz Input current (Only for reference *1) (100 V / 120 V, 60 Hz) (220 V / 240 V, 50 Hz) Min. load Rated load Max. load 0.05 A / 0.05 A 0.78 A / 0.69 A 2.30 A / 1.96 A 0.05 A / 0.04 A 0.41 A / 0.39 A 1.18 A / 1.10 A (100 V, 60 Hz /240 V, 50 Hz) 0.08 A / 0.08 A 0.78 A / 0.42 A 2.34 A / 1.18 A Input power (Only for reference *1) (100 V/120 V, 60 Hz) (220 V/240 V, 50 Hz) Min. load Rated load Max. load 2.1 W / 2.3 W 45.5 W / 45.2 W 153.3 W / 148.6 W 2.2 W / 1.6 W 45.4 W / 45.4 W 147.9 W / 146.7 W (100 V, 60 Hz /240 V, 50 Hz) 3.6 W / 2.1 W 47.1 W / 46.8 W 159.7 W / 152.2 W Inrush current 40 A (0-p) or less 40 A (0-p) or less 40 A (0-p) or less (Input: 138 V/60 Hz) (Input: 276 V/50 Hz) (Input: 276 V/50 Hz) (Ambient temperature: 25°C, At cold start) Leak current 0.25 mA or less (Input: 100 V / 50 Hz) 0.75 mA or less 0.75 mA or less 0.75 mA or less (Input: 138 V / 60 Hz) (Input: 276 V / 60 Hz) (Input: 276 V / 60 Hz) (Ambient temperature: 25°C) 43 ms or more Output holding time (Input: 85 V/47 Hz) (Input: 187 V/47 Hz) (Input: 85 V/47 Hz) (Output: Rated load/Ambient temperature: 25°C Operating Principles Overview 50

  • 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
EPSON FX-890/2190
Revision B
Operating Principles
Overview
50
2.1.2.2
C524 PSB/PSE/PSH Power Supply Circuit
This printer can be powered by one of the following three power supply boards: the
C524PSB (120 V) board, the C524PSE (230 V) board, or the C524PSH (Universal)
board. The function of the boards is the same, except for a difference in the primary
circuitry. The power supply outputs the DC current necessary to drive the printer
control circuit and drive the mechanism.
CIRCUIT CONSTITUTION
Figure 2-6 below shows the block diagram of this power supply circuit.
Figure 2-6.
Power Supply Circuit Block Diagram
INPUT SPECIFICATIONS
Table 2-3.
Circuit Constitution
Block
Description
Input Filter
Inrush current preventive circuit with a power thermistor
ZC-RCC Converter
42 V zero cross RCC of high performance
Constant-voltage detecting circuit of Tr+ZD type
Low power standby mode function by the ESAVE signal is
supported
+5 V Circuit
Chopper circuit with a MOSFET discrete structure
Table 2-4.
Input Specifications
Power Supply Unit
Name
C524 PSB
(100-120V Spec)
C524 PSE
(220-240V Spec)
C524 PSH
(100-240V Spec)
Rated input power
voltage
100-120 VAC
220-240 VAC
100-240 VAC
Input voltage range
85-138 VAC
187-276 VAC
85-276 VAC
Rated input power
frequency
50-60 Hz
47-63 Hz
Input frequency range
Input
current
(Only for
reference
*
1
)
(100 V / 120 V, 60 Hz)
(220 V / 240 V, 50 Hz)
(100 V, 60 Hz
/240 V, 50 Hz)
Min. load
0.05 A / 0.05 A
0.05 A / 0.04 A
0.08 A / 0.08 A
Rated load
0.78 A / 0.69 A
0.41 A / 0.39 A
0.78 A / 0.42 A
Max. load
2.30 A / 1.96 A
1.18 A / 1.10 A
2.34 A / 1.18 A
Input
power
(Only for
reference
*
1
)
(100 V/120 V, 60 Hz)
(220 V/240 V, 50 Hz)
(100 V, 60 Hz
/240 V, 50 Hz)
Min. load
2.1 W / 2.3 W
2.2 W / 1.6 W
3.6 W / 2.1 W
Rated load
45.5 W / 45.2 W
45.4 W / 45.4 W
47.1 W / 46.8 W
Max. load
153.3 W / 148.6 W
147.9 W / 146.7 W
159.7 W / 152.2 W
Inrush current
40 A (0-p) or less
(Input: 138 V/60 Hz)
40 A (0-p) or less
(Input: 276 V/50 Hz)
40 A (0-p) or less
(Input: 276 V/50 Hz)
(Ambient temperature: 25
°
C, At cold start)
Leak current
0.25 mA or less
(Input: 100 V / 50 Hz)
0.75 mA or less
(Input: 276 V / 60 Hz)
0.75 mA or less
(Input: 138 V / 60 Hz)
0.75 mA or less
(Input: 276 V / 60 Hz)
(Ambient temperature: 25
°
C)
Output holding time
43 ms or more
(Input: 85 V/47 Hz)
(Input: 187 V/47 Hz)
(Input: 85 V/47 Hz)
(Output: Rated load/Ambient temperature: 25
°
C