Step 8: Fusing .................................................................................................

141

Step 9: ITB cleaning ........................................................................................

142

Step 10: Drum cleaning ...................................................................................

142

Print cartridge ..................................................................................................................

143

Imaging drum ...................................................................................................................

144

Developing roller engagement and disengagement ........................................

146

Intermediate transfer belt (ITB) unit .................................................................................

147

Primary-transfer-roller engagement and disengagement ................................

148

ITB unit detection ............................................................................................

149

Secondary-transfer-roller unit ..........................................................................................

151

Calibration ........................................................................................................................

151

Color-misregistration contol ............................................................................

152

Image-stabilization control ..............................................................................

153

Color-sensor control (duplex models only) ......................................................................

153

Gray-axis correction ........................................................................................

155

Pickup, feed, and delivery system ....................................................................................................

156

Pickup-and-feed unit ........................................................................................................

159

Cassette pickup ...............................................................................................

161

Cassette paper-size and cassette-presence detection ...................

161

Cassette lift operation .....................................................................

163

Cassette paper-level and paper-presence detection ......................

164

Multifeed prevention .......................................................................

165

Multipurpose tray pickup .................................................................................

166

Multipurpose tray last-paper detection ...........................................

167

Paper feed .......................................................................................................

168

Skew-feed prevention .....................................................................

169

Paper-type detection ......................................................................

170

Feed-speed control .........................................................................

171

Fusing and delivery unit ...................................................................................................

173

Loop control ....................................................................................................

173

Pressure-roller pressurization control .............................................................

174

Duplexing unit ..................................................................................................................

175

Duplexing reverse and feed control ................................................................

176

Jam detection ...................................................................................................................................

177

Optional input trays ..........................................................................................................................

179

Paper-feeder pickup and feed operation .........................................................................

182

6 Removal and replacement

 

Removal and replacement strategy ..................................................................................................

186

Introduction ......................................................................................................................

186

Required tools ..................................................................................................................

187

Types of screws ...............................................................................................................

187

Service approach .............................................................................................................

188

ENWW

vii