Dell 1600n - Multifunction Laser Printer B/W Service Manual page 165

• Charge Voltage (MHV)
> Input Voltage : 24 V DC & 15%
> Output Voltage : -1.3KV ~ -1.8KV DC +/- 50V
> 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.
• Developing Voltage (DEV)
> Input Voltage : 24 V DC & 15%
> Output Voltage: -200V ~ -600V DC & 20 V
> 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
> 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.
•S upply
> Output Voltage : -400 V ~ -800V DC & 50 V(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.
Circuit Diagram
Service Manual
11-17