Epson FX-2190 - C524 PSB;PSE;PSH Power Supply Circuit

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