Ricoh K-C3 Service Manual page 8

B245/B276/B277/B268/B269 Service Manual
Developer Mixing....................................................................................................... 209
Development Bias ..................................................................................................... 210
Toner Supply.............................................................................................................. 211
Toner Supply Mechanism .......................................................................................... 212
Toner Density Control ................................................................................................ 212
Toner Supply in Abnormal Sensor Conditions............................................................ 216
Toner Near End/End Detection and Recovery ........................................................... 216
Drum Cleaning and Toner Recycling ............................................................................. 218
Drum Cleaning........................................................................................................... 218
Toner Recycling ......................................................................................................... 219
Paper Feed ................................................................................................................... 220
Overview.................................................................................................................... 220
Paper Feed Drive Mechanism ................................................................................... 221
Paper Feed and Separation Mechanism ................................................................... 221
Paper Lift Mechanism ................................................................................................ 222
Paper End Detection ................................................................................................. 222
Paper Size Detection ................................................................................................. 223
Side Fences............................................................................................................... 225
Paper Registration..................................................................................................... 225
Image Transfer and Paper Separation .......................................................................... 227
Overview.................................................................................................................... 227
Image Transfer Current Timing .................................................................................. 228
Transfer Roller Cleaning ............................................................................................ 228
Paper Separation Mechanism ................................................................................... 229
Image Fusing and Paper Exit ........................................................................................ 230
Overview.................................................................................................................... 230
Fusing Unit Drive and Release Mechanism............................................................... 231
Fusing Entrance Guide Shift...................................................................................... 232
Pressure Roller.......................................................................................................... 233
Fusing Temperature Control ...................................................................................... 233
Overheat Protection................................................................................................... 235
Duplex Unit....................................................................................................................237
Overall ....................................................................................................................... 237
Drive Mechanism....................................................................................................... 238
Basic operation.......................................................................................................... 238
Feed In and Exit Mechanism ..................................................................................... 241
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