Samsung SCX-4521F Series Service Manual page 30

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
NO Items
1 CHANNEL
2 CONNECTOR PIN
3 Rated Output
4 Max. 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
3 Sleep-Mode
Samsung Electronics
CH1
+5V
CON 2
5V PIN : #5pin
GND PIN: #6pin
+5V ± 5%(4.75 ~ 5.25V)
0.8 A
1.0 A
100mVp-p or less
2.5W
4W
Fuse Protection or Shutdown
within 1.5A ~ 3.0A range.
CH1(+5V)
0.6 A
0.8 A
0.5 A
CH2
+24.0V
CON 2
24V PIN: #2, #3, #4
GND PIN: #7pin
+24V -10%/+15%(21.6V ~ 27.6V)
2.5 A
2.7 A
500mVp-p or less
36W
55.2W
Fuse Protection or Shutdown
within 3.5A ~ 4.5A range.
CH2(24V)
1.3 A
1.9 A
0.3 A
System Overview
Remarks
Jam cover switch
included
within 1ms Duration
1ms
System
AVG : 65Wh
AVG : 350Wh
AVG : 10Wh
Service Manual
3-13