Samsung ML-1755 Service Manual page 27

S U M M A RY OF PRO D U C T
5) Supply Voltage
- Outputting voltage : -400 V ~ -800V DC ± 50 V(Using ZENER, DEV)
- Inputting contrast of the output stability degree : under ± 5%
Loading contrast : under ± 5%
- Output voltage rising time : 50 ms Max
- Output voltage falling time : 50 ms Max
- Output loading range : 10 MΩ ~ 1000 MΩ
- Output controlling signal (BIAS-PWM) : the CPU output is high when PWM is low.
4.5.2 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 com-
mon use. 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 outputting channels (3.3V and +24V).
There are three kinds of power, 120V exclusive (America), 220V exclusive (Europe), and 220V for china
(nations with instable power supply).
1) AC Input
- Inputting rated voltage : AC 220V ~ 240V AC 120V / AC 220V
- Inputting voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V
- Rated frequency : 50/60 Hz
- Frequency fluctuating range : 47 ~ 63 Hz
- Inputting voltage : Under 4.0Arms/2.0Arms (The state when lamp is off or rated voltage is inputted/out-
putted)
2)Rated Power Output
NO Item
1 Channel name
2 CONNECTOR PIN
3 Rated outputting voltage
4 Maximum outputting voltage
5 Peak loading voltage
6 Ripple noise voltage
7 Maximum output
8 Peak output
9 Protection for loading short and
overflowing voltage
Consumption Power
3)Consumption Power
NO Item
1 Stand-By
2 PRINTING
3 Sleep-Mode
Training Manual
4-16
CH1
+3.3V
CON 3
5V PIN: 1,3,5
GND PIN: 2,4,6
3.3V ± 5%
(3.2°≠3.4V)
1.0 A
1.5 A
100mVp-p
3.3W
4.95W
-
CH1 CH3
(+3.3V) (24V)
1.0 A 0.4 A
1.0 A 2.0 A
0.8A 0.4A
CH2 Remark
+24.0V
CON 3
24V PIN: 9,11,13
GND PIN: 10,12,14
+24V ± 10%
(21.6°≠26.4V)
2.0 A
2.5 A 1ms
500mVp-p
48W
60W 1ms
- -
System
AVG : 55 Wh
AVG : 250 Wh
AVG : 10 Wh
Samsung Electronics