Panasonic DP-8032 Service Manual

Also see for DP-8025: Operating instructions Operating instructions

Contents

227DP-8032/80252008Ver. 1.26.3. New Image Stabilizing TechnologyTo improve the copy quality, a new Toner Density Controller (QUANTUM II System) is developed.The most important aim was to stabilize the Toner Density under various office environments.Up to now, the control method was controlled by Laser Power and Grid Voltage. The new method iscontrolled by Laser Pulse Duty with the Black and Gray Patterns for the Text and Text/Photo modes, andthe Check Pattern for Photo mode. As a result, it optimizes the solid black density, keeps the line widthconsistent, and improves the halftone stability in photo mode.The following illustrations show the New System.1. Outline2. Control SystemStable image density control for long periodControl method: Laser Power, Grid VoltageControl method : Laser Pulse Duty ControlQUANTUM Control Execute Timing:1. After F8-09 (Toner Density Adj) and after F8-14 (Black Density Sensor Adjustment).2. If QUANTUM Execute Flag* is enabled, when the Power Switch is ON or during Standby Mode.*: QUANTUM Execute Flag is enabled after 8 hours have past since the previous QUANTUMcontrol.3. After 200 sheets print in condition No.2, and after every 1,000 sheets are printed.4. Manual start by General Function Mode > Manual Copy Quality Adjustment ....etc.QUANTUMWhitePatchBlack PatchLSUBias VoltageLaser PowerGrid HVPSDigital QUANTUM QUANTUM IIQUANTUMIILSULaser Pulse DutyControlPhoto Mode PatchBlack PatchCheck PatchPatchMarkPatchMarkDigital QUANTUMBlack and white density is controlled to be stableby Laser Power and Grid Voltage for long periods.Difficult to control black solid density and linewidth of the image at the same time.QUANTUM IIOptimizes solid back density and keeps linewidth consistent by Laser Pulse Duty Control.Improves halftone stability in Photo Mode usingPhoto Mode Patch.Timer / CounterOPCDrumPatch PatternImage Density SensorCheckLSUCheck PatchBlack Patch P Mode GrayLaser Pulse Duty ControlToner DensityControlToner Density SensorToner Density ControlTemperature SensorHumidity SensorQUANTUM IIControlQUANTUM IIControlPhoto Mode GrayBlackTransferControl