System Overview
Samsung Electronics
Service Manual
3-13
3.6 SMPS & HVPS
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 back of the machine. Power part is divided by two independent PBAs - SMPS PBA
and HVPS PBA. SMPS PBA supplies the DC power for driving the system and supplies the AC power to the fuser.
SMPS has two output channels : +5V and +24V. HVPS PBA supplies High voltage to the developer part to make a
printing image on the paper. High voltages applied to the MHV, THV, DEV, SUPPLY.
3.6.1 SMPS
1) AC Input
- Input Rated Voltage : AC 220V ~ 240V / AC 110V ~ 127V
- Input Voltage fluctuating range: AC 180V ~ 270V / AC 100V ~ 135V
- Rated Frequency : 50/60 Hz
- Frequency fluctuating range : 47 ~ 63 Hz
- Input Current : Under 4.0Arms / 2.5Arms
(But, the status when lamp is off or rated voltage is inputted/outputted )
2) Rated Output Power
3) Consumption Power
NO Items CH1 CH2 Remarks
1 CHANNEL +5V +24.0V
2 CONNECTOR PIN CON 2 CON 2 Jam cover switch
5V PIN : #5pin 24V PIN: #2, #3, #4 included
GND PIN: #6pin GND PIN: #7pin
3 Rated Output +5V ± 5%(4.75 ~ 5.25V)
+24V -10%/+15%(21.6V ~ 27.6V)
4 Max. Output current 0.8 A 2.5 A
5 Peak Loading current 1.0 A 2.7 A
within 1ms Duration
6 RIPPLE NOISE Voltage 100mVp-p or less 500mVp-p or less
7 Maximum output 2.5W 36W
8 Peak output 4W 55.2W 1ms
9 Protection for loading Fuse Protection or Shutdown Fuse Protection or Shutdown
shortage and within 1.5A ~ 3.0A range. within 3.5A ~ 4.5A range.
overflowing current
NO Item CH1(+5V) CH2(24V) System
1 Stand-By 0.6 A 1.3 A AVG : 65Wh
2 Printing 0.8 A 1.9 A AVG : 350Wh
3 Sleep-Mode 0.5 A 0.3 A AVG : 10Wh
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