Power Supply Board; Circuit Constitution; Input And Output Specifications - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

2.3.5 Power Supply Board

2.3.5.1 Circuit Constitution

C583PSB/C583PSE
AC
input
Quasi-resonance type
Input filter
Line-commuted flyback
1. OCP function
2. OVP function
3. Secondary side power
switch function
Block
AC input Directly connected AC cable (C583PSB)
Directly connected AC cable (C583PSE)
Input filter Inrush current preventive circuit with a power thermistor
Main
Quasi-resonance type line-commutator flyback converter
conversion
ZD type constant voltage detection circuit
circuit
Secondary-side power switch function
Primary-side OVP detection function
5 V circuit Chopper circuit with regulator L4978 (by ST)
C583MAIN (Power supply)
+42 V input
+15 V input
Block
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
Operating Principles
Fuse for LPS
(Rated current 2A)
+42V 0.8A
+15V 0.15A
5 V generation
+5V 1.2A
circuit
PSC
Description
3.3 V generation circuit
+3.3 V, 0.8 A
1.5 V generation circuit
+1.5 V, 0.8 A
12 V generation circuit
+12 V, 0.15 A
Description
Operating Principles of Electric Circuitry

2.3.5.2 Input and Output Specifications

Input Specifications
Item
Power Supply Unit
Rated input voltage
Input voltage range
Rated input power frequency
I/O
Input frequency range
CN2
Input current (reference value *)
Secondary-side switch OFF
Minimum load
Rated load
Maximum load
Input power (reference value *)
Secondary-side switch OFF
Minimum load
Rated load
Maximum load
Inrush current
Leakage current
Output holding time
Special output holding time
(Output 5 holding time from the point
when output 1 drops below 32 V)
Others
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.
Revision A
100-120 V Specifications 220-240 V Specifications
C583 PSB C583 PSE
100-120VAC 220-240VAC
85-138VAC 187-276VAC
50-60Hz
47-63Hz
(100V/120V, 60Hz) (220V/240V, 50Hz)
0.0154A/ 0.0184A 0.0276A/0.0300A
0.0198A/ 0.0217A 0.0285A/0.0308A
0.860A/ 0.742A 0.419A/0.396A
1.910A/ 1.623A 0.927A/0.873A
(100V/120V,60Hz) (220V/240V,50Hz)
0.113W/ 0.143W 0.286W/ 0.302W
0.397W/ 0.411W 0.390W/ 0.406W
48.9W/ 48.5W 48.3W/ 48.2W
132W/ 128W 126W/ 125W
30A(0-p) or below 30A(0-p) or below
(Input:138V/60Hz) (Input:276V/50Hz)
°
(Ambient temperature: 25 C at cold start)
0.25mA or below 0.75mA or below
(Input:100V, 50Hz) (Input:276V, 60Hz)
0.75mA or below
(Input:138V, 60Hz)
(Ambient temperature: 25°C)
25 ms or above
(Input: 85V/47Hz) (Input: 187V/47Hz)
(Output: Rated load/Ambient temperature:25
250 ms or above
(Input:85V, 60Hz) (Input:187V, 50Hz)
(Load condition: actual machine load condition)
– Does not start at 121 V
or below
°
C)
48