Samsung SCX-4200 manual Hvps High Voltage Power Supply

System Overview

3.2.6.1 HVPS (High Voltage Power Supply)

Transfer High Voltage (THV+)

-Input Voltage : 24 V DC 15%

-Output Voltage : MAX +5.0KV 5 %,(Duty Variable, no loading )

-Input contrast of the Voltage stability degree : under 3 % (fluctuating input 21.6V~26.4V)

Loading contrast : 3 % or less

-Output Voltage Rising Time : 100 ms Max

-Output Voltage Falling Time : 100 ms Max

-Fluctuating transfer voltage with environmental various : +650 V~ 5 KV

-Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the esistance by recognizing the voltage value, F/B, while permits the environmental recognition voltage.

-Output Voltage Control Method : Transfer Output Voltage is outputted and controlled by changing Duty of THVPWM Signal.

Charge Voltage (MHV)

-Input Voltage : 24 V DC 15%

-Output Voltage : -1.3KV ~ -1.8KV DC 3%

-Output Voltage Rising Time : 50 ms Max

-Output Voltage Falling Time : 50 ms Max

-Output Loading range : 30 M ~ 1000 M

-Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low

Cleaning Voltage (THV-)

-The (+) Transfer Voltage is not outputted because the THV PWM is controlled with high.

-The (-) Transfer Voltage is outputted because the THV-Enable Signal is controlled with low

-The output fluctuation range is big because there is no Feedback control.

-Input Voltage : 24 V DC 15%

-Output Voltage : -1KV 15%

-Output Voltage Rising Time : 100 ms Max

-Output Voltage Falling Time : 100 ms Max

Developing Voltage (DEV)

-Input Voltage : 24 V DC 15%

-Output Voltage: -200V ~ -600V DC 3%

-Output Voltage Fluctuation range: PWM Control

-Input contrast of the output stability degree : 3 % or less

Loading contrast : 3 % or less

-Output Voltage Rising Time : 50 ms Max

-Output Voltage Falling Time : 50 ms Max

-Output Loading range : 10M ~ 1000 M

-Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low.

Samsung Electronics

Service Manual 3-15