Cleaning Of Transfer Roller - Panasonic UF-5500 Service Manual

UF-5500 / 4500

13.2.5. Cleaning of Transfer Roller

The toner attached to the surface of the OPC drum is transferred to the paper at the transcription stage, but a part of the toner
remains. The cleaning is the stage that cleans the remain toner after the transcription stage. The remain toner on the drum and the
toner which was attached to the place where the laser beam didn't scan are gathered to the developing roller to be used again. After
paper jam or replacing toner and drum cartridge, the transfer roller is plus-charged to eliminate the plus-charged toner.
Grid Bias
+475V
+
Transfer Roller
+ + + + +
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ +
+ +
+
+
+
+
Charging Bias
+
+200µA
Constant current
(4.1~4.6kV)
Toner
(plus-charged)
+
Transcription Bias DC +785V
OPC Drum
+ +
Surface Potential +475V
+ +
+
+
+
+
+
+
+
+
+
+
+
+
* Toner moves according to the potential difference.
+
+
+
+
+
+
Developing Roller
+
Developing Bias
DC +170 ~ +240V+AC330VP-P
(depends on the ambience and the lifetime)
Cleaning Part
Cleaning Part
242