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
Summary of Contents for 890N - FX B/W Dot-matrix Printer
Page 1: ...EPSONFX 890 2190 Serial Impact Dot Matrix Printer SEDM02003 SERVICE MANUAL ...
Page 8: ...C H A P T E R 1 PRODUCTDESCRIPTIONS ...
Page 43: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 52: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 65: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Page 93: ...C H A P T E R 5 ADJUSTMENT ...
Page 98: ...C H A P T E R 6 MAINTENANCE ...
Page 104: ...C H A P T E R 7 APPENDIX ...
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Page 118: ...FOR FX 890 NO 4 R ev 01 C524_PACK_01 03 01 06 04 04 xx 07 02 02 02 05 05 ...
Page 120: ...FOR FX 2190 NO 2 Rev 01 C526_ELEC_01 A A B G D E J F F K L B I F H 200 400 373 330 372 450 ...