III-4
1.3
Description of Printing Process Techniques
1.3.1 Charging with electricity
In the charging process, the drum surface rotating at a constant speed is charged
uniformly with negative electricity by discharging of RTC (Rubber Tube Charge: Charged
film).
This process is performed in parallel for yellow, magenta, cyan and black colors.
•
The RTC is kept in contact with the drum and rotates following the rotations of the
drum.
RTC is a conductive roll, receives discharge voltage from HVPS (High Volume
Power Supply) and discharges at minus DC voltage.
•
The drum surface is uniformly and negatively charged with DC bias voltage.
The drum surface is optical conductor (which is insulator in a dark place and
conductor when receiving light) and the drum inside is composed of conductor.
•
The Refresher is a conductive brush, and it receives negative DC voltage from the
HVPS to catch the toner of reverse polarity returned to the drum via IDT. Also, it
removes discharge products.
-
+
-
-
+
+
-
-
-
RTC
Refresher
HVPS
Optical conductor
Conductor
Drum
Fig.3-4
Drum surface
Fig.3-5
Electric potential
on drum
-V
0
Fig.3-6
Содержание HL-4200CN
Страница 21: ...CHAPTER I SPECIFICATIONS ...
Страница 42: ...CHAPTER II INSTALLATION ...
Страница 54: ...II 11 12 Close the front cover Fig 2 27 ...
Страница 62: ...CHAPTER III STRUCTURE OF SYSTEM COMPONENTS ...
Страница 98: ...III 34 5 7 2 Reference diagram Transfer Roll Cartridge ASSY FUSER ASSY Exit Sensor FAN FUSER Fig 3 40 ...
Страница 115: ...CHAPTER IV ASSEMBLY DISASSEMBLY ...
Страница 166: ... IV 48 Magenta Fig 4 86 Cyan Fig 4 87 Holder toner cartridge ASSY 2 Holder toner cartridge ASSY 3 ...
Страница 167: ... IV 49 Black Fig 4 88 Holder toner cartridge ASSY 4 ...
Страница 204: ...CHAPTER V TROUBLESHOOTING ...
Страница 279: ...V 73 10 IMAGE QUALITY SPECIFICATIONS 10 1 Parallelism Fig 5 13 10 2 Diagonal Fig 5 14 10 3 Skew Fig 5 15 ...
Страница 280: ...V 74 10 4 Straightness Fig 5 16 10 5 Magnification Error Fig 5 17 10 6 Registration Fig 5 18 ...
Страница 281: ...V 75 10 7 Guaranteed Printing Area Fig 5 19 ...
Страница 297: ...CHAPTER VI DIAGRAMS ...
Страница 341: ...CHAPTER VII PLUG JACK P J CONNECTOR LOCATIONS ...
Страница 342: ...CONTENTS CHAPTER VII PLUG JACK P J CONNECTOR LOCATIONS VII 1 1 LIST OF P J VII 1 2 P J LAYOUT DIAGRAM VII 4 ...
Страница 346: ...VII 4 2 P J LAYOUT DIAGRAM ...
Страница 347: ...VII 5 ...
Страница 348: ...VII 6 ...
Страница 349: ...VII 7 ...
Страница 350: ...APPENDIX ...
Страница 359: ...The actual life is over than catalog specification But as you may know we are including some margin ...