Development Bias.......................................................................................................................... 1241
Removal of PCDU Seals................................................................................................................ 1241
Toner Supply................................................................................................................................................1243
Changes from the Previous Machine.................................................................................................... 1243
Overview................................................................................................................................................. 1243
Mechanism..............................................................................................................................................1244
Toner supply (toner cartridge - sub-hopper)................................................................................1244
Toner bottle ID chip........................................................................................................................1245
Toner supply (sub-hopper - development unit)............................................................................1246
Drive................................................................................................................................................ 1246
Toner near end/end detection..................................................................................................... 1246
SP Descriptions............................................................................................................................... 1249
Waste Toner................................................................................................................................................ 1251
Changes from the Previous Machine.................................................................................................... 1251
Overview................................................................................................................................................. 1251
Mechanism..............................................................................................................................................1251
Waste toner bottle set detection................................................................................................... 1251
Waste toner drive...........................................................................................................................1252
Waste toner recovery path (PCU/Image transfer unit).............................................................. 1252
Waste toner bottle full detection................................................................................................... 1253
Waste toner front door.................................................................................................................. 1253
Image Transfer and Paper Transfer........................................................................................................... 1255
Changes from the Previous Machine.................................................................................................... 1255
Overview................................................................................................................................................. 1255
Image Transfer Unit........................................................................................................................1255
Paper Transfer Unit.........................................................................................................................1256
Image Transfer Unit mechanism.............................................................................................................1256
Drive mechanism............................................................................................................................ 1256
Transfer bias................................................................................................................................... 1257
ITB contact and release................................................................................................................. 1257
Image transfer belt drive control................................................................................................... 1258
Image transfer flow........................................................................................................................ 1258
Image transfer belt cleaning mechanism.............................................................................................. 1258
31