Gestetner B070 Service Manual page 22

6.9.4 IMAGE PROCESSING MODES .....................................................6-40
6.9.5 IMAGE QUALITY SP ADJUSTMENTS...........................................6-41
Custom Settings for Each Mode: Image Quality .................................6-41
Custom Settings for Each Mode: Line Width Correction .....................6-44
Settings Adjustable for Each Original Mode........................................6-46
6.9.6 RELATION BETWEEN THE SP AND UP SETTINGS....................6-47
6.10 LASER EXPOSURE..............................................................................6-49
6.10.1 OVERVIEW ..................................................................................6-49
6.10.2 LASER EXPOSURE MECHANISM ..............................................6-50
6.10.3 LD SAFETY SWITCHES ..............................................................6-51
6.10.4 MULTI-BEAM LINE EXPOSURE..................................................6-52
6.10.5 POLYGON MIRROR MOTOR ......................................................6-53
6.10.6 1200-DPI RESOLUTION ..............................................................6-54
6.10.7 OPTICAL PATH............................................................................6-55
6.11 DRUM UNIT ..........................................................................................6-56
6.11.1 OVERVIEW ..................................................................................6-56
6.11.2 DRUM DRIVE ...............................................................................6-57
6.11.3 DRUM CHARGE...........................................................................6-58
Overview.............................................................................................6-58
Charge Corona Wire Cleaning ............................................................6-59
6.11.4 DRUM CLEANING........................................................................6-60
Overview.............................................................................................6-60
Cleaning Unit Drive .............................................................................6-61
Cleaning Blade Pressure and Side-to-Side Movement .......................6-62
6.11.5 AIR FLOW AROUND THE DRUM ................................................6-63
6.11.6 DRUM PICK-OFF PAWLS............................................................6-64
6.11.7 DRUM QUENCHING ....................................................................6-65
6.11.8 PROCESS CONTROL..................................................................6-66
What Happens at Power On ...............................................................6-66
Drum Potential Sensor Calibration......................................................6-67
Grid Voltage (Vg) Adjustment .............................................................6-68
LD Power Adjustment .........................................................................6-68
ID Sensor Calibration (Vsg) ................................................................6-68
TD Sensor Calibration (Vref)...............................................................6-69
6.12 DEVELOPMENT ...................................................................................6-70
6.12.1 OVERVIEW ..................................................................................6-70
6.12.2 DEVELOPMENT MECHANISM....................................................6-71
6.12.3 DRIVE...........................................................................................6-72
6.12.4 CROSSMIXING ............................................................................6-73
6.12.5 DEVELOPMENT BIAS .................................................................6-74
6.12.6 DEVELOPMENT UNIT TONER SUCTION...................................6-75
6.12.7 TONER HOPPER .........................................................................6-77
Toner Supply ......................................................................................6-77
Toner Hopper Empty Detection ..........................................................6-78
6.12.8 TONER DENSITY CONTROL ......................................................6-79
Overview.............................................................................................6-79
Toner Supply Timing...........................................................................6-79
Sensor Control Mode ..........................................................................6-80
Image Pixel Count Control ..................................................................6-82
B070/B071
CÓPIA NÃO CONTROLADA
x
CÓPIA NÃO CONTROLADA
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