Samsung ML-2250/XBG Service Manual page 37

Summary of Product
S U M M A RY OF PRO D U C T
4.4.2 SMPS(Switching Mode Power Supply)
It is the power source of entire system. It is assembled by an independent module, so it is possible to use
for common use. It is mounted at the bottom of the set.
It is consisted of the AMPS part, which supplies the DC power for driving the system, and the AC heater
control part, which supplies the power to fuser. SMPS has two output channels. Which are 3.3V and +24V.
1) AC Input
- Input Rated voltage : AC 220V ~ 240V AC 120V / AC 220V(EXP version)
- Input Voltage range : AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V(EXP version)
- Rated Frequency : 50/60 Hz
- Frequency range : 47 ~ 63 Hz
- Input Current : Under 4.0A rms/2.0A rms
(When the fuser lamp is off and input / output voltages are in range)
2) Rated Output Power
NO Item
1 Channel name
2 CONNECTOR PIN
3 Rated output
4 Maxi output current
5 Peak loading current
6 Ripple noise voltage
7 Maximum output
8 Peak output
9 Protection for loading shortage
and overflowing current
3) Consumption Power
NO Item
1 Stand-By
2 PRINTING
Service Manual Training Manual
4-16 4-16
CH1
+3.3V
CON 3
3.3V PIN: 3, 4
GND PIN: 5, 6
3.3V ± 5%
(3.2 ~ 3.4V)
1.0 A
1.5 A
Under 100mVp-p
3.3W
4.95W
-
CH1 CH2
(+3.3V) (+5V)
1.0 A 0.07A
1.0 A 0.14A
CH2 CH3
+5V +24.0V
CON3 CON 3
5V PIN : 8 24V PIN: 11, 12, 13
GND PIN: 7 GND : 9. 10
+5V ± 5% +24V ± 10%
(4.75 ~ 5.25V) (21.6 ~ 26.4V)
0.14A 2.0 A
0.14A 2.5 A
100mVp-p Under 500mVp-p
0.35W 48W
0.7W 60W
-
CH3
(24V)
0.4 A
2.0 A
Remark
1ms
1ms
System
AVG : 55 Wh
AVG : 280 Wh
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