3.2.6.2 SMPS (Switching Mode Power Supply)
It is the power source of entire system. It is assembled by an independent module and completely common use
with SCX-4200, so it is same characteristic with SCX-4200. It is mounted at the bottom of the set.
It is consisted of the SMPS 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 +5V and +24V.
AC Input
- Input Rated Voltage: AC 220V ~ 240V AC 110V ~ 127V
- Input Voltage fluctuating Range: AC 198V ~ 264V AC 99V ~ 135V
- Rated Frequency: 50/60 Hz
- Frequency Fluctuating Range: 47 ~ 63 Hz
- Input Current: Under 5.0Arms / 2.5Arms (But, the status when lamp is off or rated voltage is inputted/outputted )
Rated Output Power
NO
ITEM
CH1
CH2
CH3
Remark
1
CHANNEL NAME
+5V
+24V
+24.0VS
2
CONNECTOR PIN
CON2
CON 2
CON 2
5V PIN 3, 4, 24
24V PIN:13
24VS PIN:11, 12
GND PIN 5,6
GND PIN:7, 9, 10
GND PIN:7, 9, 10
3
Rated Output
+5V
5%
+24V-10/15%
+24VS-10/15%
(4.75~5.25V)
(21.6~27.6V)
(21.6~27.46V)
4
Max. Output current
1.0A
0.5 A
1.0 A
5
Peak Loading voltage
1.5A
1.0 A
1.5 A
1ms
6
RIPPLE NOISE
Under 150m Vp-p
Under500mVp-p
Under 500mVp-p
Voltage
7
Maximum output
5.0W
12W
24W
Samsung Electronics
Service Manual
System Overview
3-16
Supply
- Output Voltage : -400 V ~ -800V DC
5%(ZENER using, DEV )
- Input contrast of the output stability degree : under
3 %
Loading contrast :
5 % or less
- Output Voltage Rising Time: 50 ms Max
- Output Voltage Falling Time: 50 ms Max
- Output Loading Range: 10 M
~ 1000 M
- Output Control Signal (BIAS-PWM): the CPU is HV output when PWM is low.
