Epson Stylus Photo RX700 - 2.3.5 Power Supply Board

EPSON Stylus Photo RX700 Revision A
Operating Principles Operating Principles of Electric Circuitry 48
2.3.5 Power Supply Board
2.3.5.1 Circuit Constitution
 C583PSB/C583PSE
 C583MAIN (Power supply)
2.3.5.2 Input and Output Specifications
 Input Specifications
Note "*": Each value indicated here is only the average of measured values of samples (sample
size n = 3), that is, it is not a typical value or guaranteed value.
Block Description
AC input Directly connected AC cable (C583PSB)
Directly connected AC cable (C583PSE)
Input filter Inrush current preventive circuit with a power thermistor
Main
conversion
circuit
 Quasi-resonance type line-commutator flyback converter
 ZD type constant voltage detection circuit
 Secondary-side power switch function
 Primary-side OVP detection function
5 V circuit Chopper circuit with regulator L4978 (by ST)
Block Description
3.3 V circuit Chopper circuit with regulator FA7728F (Fuji Electric)
1.5 V circuit Chopper circuit with regulator FA7728F (Fuji Electric)
12 V circuit
 Dropper circuit with regulator NJM2386 (New Japan Radio)
 ON/OFF function
Quasi-resonance type
Line-commuted flyback
1. OCP function
2. OVP function
3. Secondary side power
switch function
Input filter
AC
input
Fuse for LPS
(Rated current 2A)
+42V 0.8A
+15V 0.15A
+5V 1.2A
PSC
I/O
CN2
5 V generation
circuit
+42 V input
+3.3 V, 0.8 A
+1.5 V, 0.8 A
+15 V input
+12 V, 0.15 A
3.3 V generation circuit
1.5 V generation circuit
12 V generation circuit
Item 100-120 V Specifications 220-240 V Specifications
Power Supply Unit C583 PSB C583 PSE
Rated input voltage 100-120VAC 220-240VAC
Input voltage range 85-138VAC 187-276VAC
Rated input power frequency 50-60Hz
Input frequency range 47-63Hz
Input current (reference value *) (100V/120V, 60Hz) (220V/240V, 50Hz)
Secondary-side switch OFF 0.0154A/ 0.0184A 0.0276A/0.0300A
Minimum load 0.0198A/ 0.0217A 0.0285A/0.0308A
Rated load 0.860A/ 0.742A 0.419A/0.396A
Maximum load 1.910A/ 1.623A 0.927A/0.873A
Input power (reference value *) (100V/120V,60Hz) (220V/240V,50Hz)
Secondary-side switch OFF 0.113W/ 0.143W 0.286W/ 0.302W
Minimum load 0.397W/ 0.411W 0.390W/ 0.406W
Rated load 48.9W/ 48.5W 48.3W/ 48.2W
Maximum load 132W/ 128W 126W/ 125W
Inrush current 30A(0-p) or below
(Input:138V/60Hz)
30A(0-p) or below
(Input:276V/50Hz)
(Ambient temperature: 25
°C at cold start)
Leakage current 0.25mA or below
(Input:100V, 50Hz)
0.75mA or below
(Input:138V, 60Hz)
0.75mA or below
(Input:276V, 60Hz)
(Ambient temperature: 25°C)
Output holding time 25 ms or above
(Input: 85V/47Hz) (Input: 187V/47Hz)
(Output: Rated load/Ambient temperature:25°C)
Special output holding time
(Output 5 holding time from the point
when output 1 drops below 32 V)
250 ms or above
(Input:85V, 60Hz) (Input:187V, 50Hz)
(Load condition: actual machine load condition)
Others – Does not start at 121 V
or below