Samsung ML-2571N Service Manual

Also see for ML-2510 series: Specifications Manual Del Usuario User manual User guide

Contents

Samsung ElectronicsService ManualSystem Overview3-20- Environment Condition. Operating temperature range : 0 40. Maintaining temperature range : -20 40. Preserving Humidity Condition : 10% ~ 90% RH. Operating atmospheric pressure range : 1atm- EMI Requirement : CISPR ,FCC, CE, MIC,- Safty Requrement : IEC950 UL1950, CSA950, C-UL,Semko, EK,CB,CCC(CCIB),GOST, EPA, Power Save3.2.6 HVPS board (High Voltage Power Supply)The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for makingbest condition to display the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS,and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.1) Transfer High Voltage (THV+)- Input Voltage : 24 V DC ° 15%- Out Voltage : Max. +1.3KV ° 15% (Cleaning,200 )- Out Voltage Trigger : 6.5- Input Voltage Variation : 5 % below(Variation 21.6V°≠26.4V)Load Variation : % below- Out Voltage Rising Time : 100 ms Max- Out Voltage Falling Time : 100 ms Max- Transfer Variation Voltage on Environment Variation : +650 V(Duty 10%) ~ 5KV (Duty 90%)- Control Method on environment : THV-PWM ACTIVE,transfer Active signal, of environment sensingvoltage is input and get feed back current, and recalculate it to resistence .- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal asfollows. 10% Duty : +650V, 90% Duty : +5KV 5%2) Charge Voltage (MHV)- Input Voltage : 24 V DC 15%- Out Voltage : -1.3KV ~ 3.2%- Out Voltage Rising Time : 50 ms Max- Out Voltage Falling Time : 50 ms Max- Out Voltage Range : 30 ~ 1000- Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low3) Developing Voltage (DEV)- IInput Voltage : 24 V DC 15%- Output Voltage: -350V 4.6%- Output Voltage Fluctuation range: PWM Control- Input contrast of the output stability degree : 5 % or less- Loading contrast : 5 % or less- Output Voltage Rising Time : 50 ms Max