Samsung ML-2851ND/XAZ Service Manual page 31

Supply
- Output Voltage : -400 V ~ -800V DC
- Input contrast of the output stability degree : under
Loading contrast :
- Output Voltage Rising Time : 50 ms Max
- Output Voltage Falling Time : 50 ms Max
- Output Loading range : 10 M
- Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.
SW2
SW2
( Rear-Cover
( Rear-Cover
Open Switch )
Open Switch )
MHV
MHV
DEV
DEV
OPC
OPC
SUPPLY
SUPPLY
THV
THV
VARISTOR
VARISTOR
2.2.3.2(b) SMPS (Switching Mode Power Supply)
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 the side 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 4.0Arms / 2.0Arms (But, the status when e-coil is off or rated voltage is inputted/outputted )
Service Manual
Product spec and feature
50 V(ZENER using, DEV )
5 % or less
~ 1000 M
5 %
2-22
CN1
CN1
(Main PBA CON.)
(Main PBA CON.)
SW1
SW1
( Front -Cover
( Front -Cover
Open Switch )
Open Switch )
Samsung Electronics