Cassette paper-level and paper-presence detection
......................
186
Multifeed prevention
.......................................................................
187
Multipurpose tray pickup
.................................................................................
188
Multipurpose tray last-paper detection
...........................................
189
Paper feed
.......................................................................................................
190
Skew-feed prevention
.....................................................................
191
Paper-type detection
......................................................................
192
Feed-speed control
.........................................................................
193
Fusing and delivery unit
...................................................................................................
195
Loop control
....................................................................................................
195
Pressure-roller pressurization control
.............................................................
196
Duplexing unit
..................................................................................................................
197
Duplexing reverse and feed control
................................................................
198
Jam detection
...................................................................................................................................
199
Optional input trays
..........................................................................................................................
201
Paper-feeder pickup and feed operation
.........................................................................
204
Scanner component
.........................................................................................................................
206
Product boards
................................................................................................................
207
Scanner system block diagram
........................................................................................
208
Scanner image-data path
................................................................................................
209
Scanner power topology
..................................................................................................
210
Scanner power states
......................................................................................................
211
Sensor topology
...............................................................................................................
212
Boards I/Os
......................................................................................................................
215
Scanner operation flow
....................................................................................................
217
ADF
..................................................................................................................................................
221
Input tray
..........................................................................................................................
221
ADF simplex-printing operation sequence
.......................................................................
221
ADF duplex-printing operation sequence
........................................................................
222
Multifeed operation
..........................................................................................................
223
End of a scan job operation
.............................................................................................
224
Paper pick and separation operation
...............................................................................
224
Deskew
............................................................................................................................
225
6
Removal and replacement
Removal and replacement strategy
..................................................................................................
228
Introduction
......................................................................................................................
228
Required tools
..................................................................................................................
229
Types of screws
...............................................................................................................
229
Service approach
.............................................................................................................
230
Before performing service
................................................................................................
230
After performing service
...................................................................................................
230
Parts removal order
.........................................................................................................
231
viii
ENWW