Service Manual
Summary of Product
4-20
Samsung Electronics
4.4.2 SMPS(Switching Mode Power Supply)
It is the power source for the whole system. It is an independent module so it is possible to use for common use. It is
mounted at the bottom of the set.
It consists of the SMPS part, which supplies the DC power for driving the system, and the AC heater control part, which
supplies the power for fuser. SMPS has three outputting channels (3.3V, 5V and +24V).
There are three kinds of power, 120V exclusive (America), 220V exclusive (Europe), and 220V for china (nations with insta-
ble power supply).
>>AC Input
• Inputting rated voltage : AC 220V ~ 240V AC 100V ~ AC 127V
• Inputting voltage fluctuating range: AC 198V ~ 255V AC 90V ~ 135V
• Rated frequency : 50/60 Hz
• Frequency fluctuating range : 47 ~ 63 Hz
• Inputting voltage: Under 5.5Arms/2.5Arms
>>Rated Power Output
>>Consumption Power
>>Length of Power Cord: 1830 ± 50mm
>>Power Switch : Use
NO Item CH1 CH2 CH3 Remark
1 Channel name +3.3V +5V +24.0V
2 CONNECTOR PIN CON 3 CON 3 CON 3
3.3V PIN: 12, 14 5V PIN : 8 24V PIN: 2, 4, 6
GND PIN: 16, 18 GND PIN: 7 GND : 7, 8, 10
3 Rated outputting voltage 3.3V ± 5% +5V ± 5% +24V ± 5%, -5%
(3.2 ~ 3.4V) (4.75 ~ 5.25V) (21.6 ~ 26.4V)
4 Maximum outputting voltage 1.5 A 0.5 A 0.5 A
5 Peak loading voltage 1.5 A 0.5 A 0.5 A 1ms
6 Ripple noise voltage 200mVp-p 100mVp-p 500mVp-p
7 Maximum output 5 W 2.5 W 84 W
8 Peak output 5 W 2.5 W 84 W 1ms
NO Item CH1 CH2 CH3 System
(+3.3V) (+5V) (+24V)
1 Stand-By 0.6 A 0.25A 0.4 A AVG : 100 Wh
2 PRINTING 1.0 A 0.25 A 2.0 A AVG : 450 Wh
3 Sleep-Mode 0.4 A 0.01 A 0.4 A AVG : 20 Wh
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