Samsung ML-4550 Service Manual

Also see for ML ML-4551N: Specifications Solution guide Quick install guide User guide Declaration of conformity

Contents

Summary of ProductService Manual 3-17Samsung Electronics3.3.2.1 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 )-1.2KV 15% (when cleaning, 200 )- Output Voltage Trigger : 6.5- Input contrast of the Voltage stability degree :under 5 % (fluctuating input 21.6V ~ 26.4V)Loading contrast : 5 % or less- Output Voltage Rising Time : 100 ms Max- Output Voltage Falling Time : 100 ms Max- Fluctuating transfer voltage with environmental various : +650 V(Duty 10%) ~ 5 KV (Duty 90%)- Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the resistanceby 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 THVPWMSignal. 10% Duty : +650V, 90%Duty : +5KV 5%Fuser Voltage- Input Voltage : 24 V DC 15%- Output Voltage : 30V~1000V DC 30V- 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 LowCleaning 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.Developing Voltage (DEV)- Input Voltage : 24 V DC 15%- Output Voltage: -200V ~ -600V DC 20V- Output Voltage Fluctuation range: PWM Control- Input contrast of the output stability degree : 5 % or lessLoading contrast : 5 % 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.Supply- Output Voltage : -400V~ -800V DC 50V(ZENER using, DEV )- Input contrast of the output stability degree : under 5 %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.