Figure 4-1 Slot for the security cable ................................................................................................................ 92
Figure 4-2 Supply item locations ...................................................................................................................... 94
Figure 5-1 Relationship between the main product systems ......................................................................... 116
Figure 5-2 Engine-control system .................................................................................................................. 118
Figure 5-3 DC controller block diagram .......................................................................................................... 119
Figure 5-4 High-voltage power supply circuits ............................................................................................... 123
Figure 5-5 Low-voltage power-supply circuit .................................................................................................. 125
Figure 5-6 Fuser (fixing) components ............................................................................................................ 127
Figure 5-7 Fuser temperature-control circuit .................................................................................................. 128
Figure 5-8 Laser/scanner system ................................................................................................................... 131
Figure 5-9 Image-formation system ............................................................................................................... 133
Figure 5-10 Image-formation process ............................................................................................................ 134
Figure 5-11 Pre-exposure .............................................................................................................................. 135
Figure 5-12 Primary charging ......................................................................................................................... 135
Figure 5-13 Laser-beam exposure ................................................................................................................. 136
Figure 5-14 Development ............................................................................................................................... 136
Figure 5-15 Primary transfer .......................................................................................................................... 137
Figure 5-16 Secondary transfer ...................................................................................................................... 137
Figure 5-17 Separation ................................................................................................................................... 138
Figure 5-18 Fusing ......................................................................................................................................... 138
Figure 5-19 ITB cleaning ................................................................................................................................ 139
Figure 5-20 Drum cleaning ............................................................................................................................. 139
Figure 5-21 Print-cartridge system ................................................................................................................. 140
Figure 5-22 Developing-roller engagement and disengagement control ....................................................... 141
Figure 5-23 ITB unit ........................................................................................................................................ 142
Figure 5-24 Three states of primary-transfer-roller engagement and disengagement ................................... 144
Figure 5-25 ITB cleaning process .................................................................................................................. 145
Figure 5-26 Toner patterns for calibration ...................................................................................................... 146
Figure 5-27 Switches and sensors for the pickup, feed, and delivery system ............................................... 148
Figure 5-28 Motors and solenoids for the pickup, feed, and delivery system ................................................ 149
Figure 5-29 Three main units of the pickup, feed, and delivery system ......................................................... 150
Figure 5-30 Pickup and feed unit ................................................................................................................... 151
Figure 5-31 Cassette-pickup mechanism ....................................................................................................... 152
Figure 5-32 Cassette presence sensor .......................................................................................................... 153
Figure 5-33 Cassette lift mechanism .............................................................................................................. 154
Figure 5-34 Paper-level-detection mechanism .............................................................................................. 155
Figure 5-35 Multifeed prevention .................................................................................................................... 155
Figure 5-36 Multipurpose tray pickup mechanism .......................................................................................... 156
Figure 5-37 Paper-feed mechanism ............................................................................................................... 157
Figure 5-38 Skew-feed prevention ................................................................................................................. 158
Figure 5-39 Fuser and delivery unit ................................................................................................................ 159
Figure 5-40 Loop-control mechanism ............................................................................................................. 160
Figure 5-41 Pressure-roller pressurization control ......................................................................................... 161
Figure 5-42 Duplexing unit ............................................................................................................................. 162
Figure 5-43 Jam detection sensors ................................................................................................................ 164
Figure 5-44 Optional paper feeder ................................................................................................................. 166
Figure 5-45 Signals for the paper feeder ....................................................................................................... 167
Figure 5-46 Paper-feeder pickup and feed operation .................................................................................... 168
Figure 5-47 Paper size detection ................................................................................................................... 169
Figure 5-48 Paper-feeder cassette lift ........................................................................................................... 171
Figure 5-49 Paper-feeder multiple feed prevention ........................................................................................ 172
Figure 5-50 Jam detection .............................................................................................................................. 173
Figure 5-51 ADF path for single-sided documents ......................................................................................... 175
Figure 5-52 ADF path for two-sided documents ............................................................................................ 176
Figure 6-1 Phillips and pozidrive screwdriver comparison ............................................................................. 179
Figure 6-2 DC controller PCA ......................................................................................................................... 183
Figure 6-3 Parts removal order (1 of 2) .......................................................................................................... 184
Figure 6-4 Parts removal order (2 of 2) .......................................................................................................... 185
Figure 6-5 Remove the print cartridge (1 of 2) ............................................................................................... 186
Figure 6-6 Remove the print cartridge (2 of 2) ............................................................................................... 187
Figure 6-7 Remove the stapler cartridge ........................................................................................................ 188
Figure 6-8 Remove the duplex-reverse guide (1 of 2) ................................................................................... 189
Figure 6-9 Remove the duplex-reverse guide (2 of 2) ................................................................................... 189
Figure 6-10 Remove the toner-collection unit (1 of 4) .................................................................................... 190
Figure 6-11 Remove the toner-collection unit (2 of 4) .................................................................................... 190
Figure 6-12 Remove the toner-collection unit (3 of 4) .................................................................................... 191
Figure 6-13 Remove the toner-collection unit (4 of 4) .................................................................................... 191
Figure 6-14 Remove the formatter ................................................................................................................. 192
Figure 6-15 Remove the memory DIMM (1 of 2) ............................................................................................ 193
Figure 6-16 Remove the memory DIMM (2 of 2) ............................................................................................ 194
Figure 6-17 Remove the hard drive and SATA cable (1 of 3) ........................................................................ 195
Figure 6-18 Remove the hard drive and SATA cable (2 of 3) ........................................................................ 196
Figure 6-19 Remove the hard drive and SATA cable (3 of 3) ........................................................................ 196
Figure 6-20 Remove the fax PCA and cable (1 of 2) ..................................................................................... 197
Figure 6-21 Remove the fax PCA and cable (2 of 2) ..................................................................................... 198
Figure 6-22 Remove the tray cassette (1 of 2) ............................................................................................... 199
Figure 6-23 Remove the tray cassette (2 of 2) ............................................................................................... 199
Figure 6-24 Remove the fuser (1 of 2) ........................................................................................................... 200
Figure 6-25 Remove the fuser (2 of 2) ........................................................................................................... 200
Figure 6-26 Remove the pickup roller (Tray 2) (1 of 4) .................................................................................. 201
Figure 6-27 Remove the pickup roller (Tray 2) (2 of 4) .................................................................................. 201
Figure 6-28 Remove the pickup roller (Tray 2) (3 of 4) .................................................................................. 202
Figure 6-29 Remove the pickup roller (Tray 2) (4 of 4) .................................................................................. 202
Figure 6-30 Remove the Pickup and feed rollers (Tray 3) (1 of 2) ................................................................. 203
Figure 6-31 Remove the Pickup and feed rollers (Tray 3) (2 of 2) ................................................................. 203
Figure 6-32 Remove the separation roller (Tray 2) ........................................................................................ 204
Figure 6-33 Remove the transfer roller (1 of 3) .............................................................................................. 205
Figure 6-34 Remove the transfer roller (2 of 3) .............................................................................................. 205
Figure 6-35 Remove the transfer roller (3 of 3) .............................................................................................. 206
Figure 6-36 Reinstall the transfer roller .......................................................................................................... 206
Figure 6-37 Remove the transfer roller (2 of 3) .............................................................................................. 207
Figure 6-38 Remove the secondary transfer assembly (1 of 2) ..................................................................... 207
Figure 6-39 Remove the secondary transfer assembly (2 of 2) ..................................................................... 208
Figure 6-40 Reinstall the secondary transfer assembly ................................................................................. 208
Figure 6-41 Remove the intermediate transfer belt (1 of 3) ........................................................................... 209
Figure 6-42 Remove the intermediate transfer belt (2 of 3) ........................................................................... 209
Figure 6-43 Remove the intermediate transfer belt (3 of 3) ........................................................................... 210
Figure 6-44 Remove the front-door assembly (1 of 2) ................................................................................... 211
Figure 6-45 Remove the front-door assembly (2 of 2) ................................................................................... 211
Figure 6-46 Remove the ADF assembly (1 of 4) ............................................................................................ 212
Figure 6-47 Remove the ADF assembly (2 of 4) ............................................................................................ 212
Figure 6-48 Remove the ADF assembly (3 of 4) ............................................................................................ 213
Figure 6-49 Remove the ADF assembly (4 of 4) ............................................................................................ 213
Figure 6-50 Remove the ADF roller assembly and separation pad (1 of 5) ................................................... 215
Figure 6-51 Remove the ADF roller assembly and separation pad (2 of 5) ................................................... 215
Figure 6-52 Remove the ADF roller assembly and separation pad (3 of 5) ................................................... 216
Figure 6-53 Remove the ADF roller assembly and separation pad (4 of 5 ) .................................................. 216
Figure 6-54 Remove the ADF roller assembly and separation pad (5 of 5) ................................................... 217
Figure 6-55 Reinstall the ADF roller assembly ............................................................................................... 217
Figure 6-56 Remove the control-panel overlay (1 of 2) .................................................................................. 218
Figure 6-57 Remove the control-panel overlay (2 of 2) .................................................................................. 218
Figure 6-58 Remove the control-panel assembly (1 of 3) .............................................................................. 219
Figure 6-59 Remove the control-panel assembly (2 of 3) .............................................................................. 219
Figure 6-60 Remove the control-panel assembly (3 of 3) .............................................................................. 220
Figure 6-61 Remove the right door; optional paper feeder (1 of 3) ................................................................ 221
Figure 6-62 Remove the right door; optional paper feeder (2 of 3) ................................................................ 221
Figure 6-63 Remove the right door; optional paper feeder (3 of 3) ................................................................ 222
Figure 6-64 External panels, covers, doors, and scanner assembly; identification and location ................... 223
Figure 6-65 Remove the front-upper cover (1 of 4) ........................................................................................ 225
Figure 6-66 Remove the front-upper cover (2 of 4) ........................................................................................ 225
Figure 6-67 Remove the front-upper cover (3 of 4) ........................................................................................ 226
Figure 6-68 Remove the front-upper cover (4 of 4) ........................................................................................ 226
Figure 6-69 Remove the right-door assembly (1 of 8) ................................................................................... 227
Figure 6-70 Remove the right-door assembly (2 of 8) ................................................................................... 227
Figure 6-71 Remove the right-door assembly (3 of 8) ................................................................................... 228
Figure 6-72 Remove the right-door assembly (4 of 8) ................................................................................... 228
Figure 6-73 Remove the right-door assembly (5 of 8) ................................................................................... 229
Figure 6-74 Remove the right-door assembly (6 of 8) ................................................................................... 229
Figure 6-75 Remove the right-door assembly (7 of 8) ................................................................................... 230
Figure 6-76 Remove the right-door assembly (8 of 8) ................................................................................... 230
Figure 6-77 Remove the right-rear cover (1 of 3) ........................................................................................... 231
Figure 6-78 Remove the right-rear cover (2 of 3) ........................................................................................... 231
Figure 6-79 Remove the right-rear cover (3 of 3) ........................................................................................... 232
Figure 6-80 Remove the left cover (1 of 5) ..................................................................................................... 233
Figure 6-81 Remove the left cover (2 of 5) ..................................................................................................... 233
Figure 6-82 Remove the left cover (3 of 5) ..................................................................................................... 234
Figure 6-83 Remove the left cover (4 of 5) ..................................................................................................... 234
Figure 6-84 Remove the left cover (5 of 5) ..................................................................................................... 235
Figure 6-85 Remove the rear-upper cover (1 of 4) ........................................................................................ 236
Figure 6-86 Remove the rear-upper cover (2 of 4) ........................................................................................ 236
Figure 6-87 Remove the rear-upper cover (3 of 4) ........................................................................................ 237
Figure 6-88 Remove the rear-upper cover (4 of 4) ........................................................................................ 237
Figure 6-89 Remove the rear cover (1 of 2) ................................................................................................... 238
Figure 6-90 Remove the rear cover (2 of 2) ................................................................................................... 238
Figure 6-91 Remove the right-front cover (1 of 5) .......................................................................................... 239
Figure 6-92 Remove the right-front cover (2 of 5) .......................................................................................... 239
Figure 6-93 Remove the right-front cover (3 of 5) .......................................................................................... 240
Figure 6-94 Remove the right-front cover (4 of 5) .......................................................................................... 240
Figure 6-95 Remove the right-front cover (5 of 5) .......................................................................................... 241
Figure 6-96 Reinstall the power button .......................................................................................................... 241
Figure 6-97 Remove the scanner assembly (1 of 6) ...................................................................................... 242
Figure 6-98 Remove the scanner assembly (2 of 6) ...................................................................................... 242
Figure 6-99 Remove the scanner assembly (3 of 6) ...................................................................................... 243
Figure 6-100 Remove the scanner assembly (4 of 6) .................................................................................... 243
Figure 6-101 Remove the scanner assembly (5 of 6) .................................................................................... 244
Figure 6-102 Remove the scanner assembly (6 of 6) .................................................................................... 244
Figure 6-103 Remove the delivery cover (1 of 3) ........................................................................................... 245
Figure 6-104 Remove the delivery cover (2 of 3) ........................................................................................... 246
Figure 6-105 Remove the delivery cover (3 of 3) ........................................................................................... 246
Figure 6-106 Remove the left-upper cover (1 of 2) ........................................................................................ 247
Figure 6-107 Remove the left-upper cover (2 of 2) ........................................................................................ 248
Figure 6-108 Remove the front stapler cover and right-side stapler cover (1 of 13) ...................................... 249
Figure 6-109 Remove the front stapler cover and right-side stapler cover (2 of 13) ...................................... 250
Figure 6-110 Remove the front stapler cover and right-side stapler cover (3 of 13) ...................................... 250
Figure 6-111 Remove the front stapler cover and right-side stapler cover (4 of 13) ...................................... 251
Figure 6-112 Remove the front stapler cover and right-side stapler cover (5 of 13) ...................................... 251
Figure 6-113 Remove the front stapler cover and right-side stapler cover (6 of 13) ...................................... 252
Figure 6-114 Remove the front stapler cover and right-side stapler cover (7 of 13) ...................................... 252
Figure 6-115 Remove the front stapler cover and right-side stapler cover (8 of 13) ...................................... 253
Figure 6-116 Remove the front stapler cover and right-side stapler cover (9 of 13) ...................................... 253
Figure 6-117 Remove the front stapler cover and right-side stapler cover (10 of 13) .................................... 254
Figure 6-118 Remove the front stapler cover and right-side stapler cover (11 of 13) .................................... 254
Figure 6-119 Remove the front stapler cover and right-side stapler cover (12 of 13) .................................... 255
Figure 6-120 Remove the front stapler cover and right-side stapler cover (13 of 13) .................................... 255
Figure 6-121 Reinstall the right-side stapler cover (1 of 3) ............................................................................ 256
Figure 6-122 Reinstall the right-side stapler cover (2 of 3) ............................................................................ 256
Figure 6-123 Reinstall the right-side stapler cover (3 of 3) ............................................................................ 257
Figure 6-124 Remove the right-top cover (1 of 5) .......................................................................................... 258
Figure 6-125 Remove the right-top cover (2 of 5) .......................................................................................... 259
Figure 6-126 Remove the right-top cover (3 of 5) .......................................................................................... 259
Figure 6-127 Remove the right-top cover (4 of 5) .......................................................................................... 260
Figure 6-128 Remove the right-top cover (5 of 5) .......................................................................................... 260
Figure 6-129 Remove the front-top cover (1 of 2) .......................................................................................... 261
Figure 6-130 Remove the front-top cover (2 of 2) .......................................................................................... 261
Figure 6-131 Remove the rear-top cover (1 of 2) ........................................................................................... 262
Figure 6-132 Remove the rear-top cover (2 of 2) ........................................................................................... 263
Figure 6-133 Remove the stapler assembly (1 of 2) ...................................................................................... 264
Figure 6-134 Remove the stapler assembly (2 of 2) ...................................................................................... 265
Figure 6-135 Reinstall the stapler assembly .................................................................................................. 265
Figure 6-136 Remove the stapler power supply ............................................................................................ 266
Figure 6-137 Remove the ICB (1 of 3) ........................................................................................................... 267
Figure 6-138 Remove the ICB (2 of 3) ........................................................................................................... 268
Figure 6-139 Remove the ICB (3 of 3) ........................................................................................................... 268
Figure 6-140 Reinstall the ICB ....................................................................................................................... 269
Figure 6-141 Remove the DC controller PCA and tray (1 of 4) ...................................................................... 270
Figure 6-142 Remove the DC controller PCA and tray (2 of 4) ...................................................................... 271
Figure 6-143 Remove the DC controller PCA and tray (3 of 4) ...................................................................... 271
Figure 6-144 Remove the DC controller PCA and tray (4 of 4) ...................................................................... 272
Figure 6-145 Remove the LVPS (1 of 10) ...................................................................................................... 273
Figure 6-146 Remove the LVPS (2 of 10) ...................................................................................................... 274
Figure 6-147 Remove the LVPS (3 of 10) ...................................................................................................... 274
Figure 6-148 Remove the LVPS (4 of 10) ...................................................................................................... 275
Figure 6-149 Remove the (5 of 10) ................................................................................................................ 275
Figure 6-150 Remove the (6 of 10) ................................................................................................................ 276
Figure 6-151 Remove the LVPS (7 of 10) ...................................................................................................... 276
Figure 6-152 Remove the LVPS (8 of 10) ...................................................................................................... 277
Figure 6-153 Remove the LVPS (9 of 10) ...................................................................................................... 277
Figure 6-154 Remove the LVPS (10 of 10) .................................................................................................... 278
Figure 6-155 Remove the SCB (1 of 8) .......................................................................................................... 279
Figure 6-156 Remove the SCB (2 of 8) .......................................................................................................... 280
Figure 6-157 Remove the SCB (3 of 8) .......................................................................................................... 280
Figure 6-158 Remove the SCB (4 of 8) .......................................................................................................... 281
Figure 6-159 Remove the (5 of 8) .................................................................................................................. 281
Figure 6-160 Remove the SCB (6 of 8) .......................................................................................................... 282
Figure 6-161 Remove the SCB (7 of 8) .......................................................................................................... 282
Figure 6-162 Remove the SCB (8 of 8) .......................................................................................................... 283
Figure 6-163 Reinstalling the SCB ................................................................................................................. 283
Figure 6-164 Remove the pickup roller (Tray 1) (1 of 2) ................................................................................ 284
Figure 6-165 Remove the pickup roller (Tray 1) (2 of 2) ................................................................................ 284
Figure 6-166 Remove the delivery fan, cartridge fan, and environmental sensor (1 of 9) ............................. 285
Figure 6-167 Remove the delivery fan, cartridge fan, and environmental sensor (2 of 9) ............................. 285
Figure 6-168 Remove the delivery fan, cartridge fan, and environmental sensor (3 of 9) ............................. 286
Figure 6-169 Remove the delivery fan, cartridge fan, and environmental sensor (4 of 9) ............................. 286
Figure 6-170 Remove the delivery fan, cartridge fan, and environmental sensor (5 of 9) ............................. 287
Figure 6-171 Remove the delivery fan, cartridge fan, and environmental sensor (6 of 9) ............................. 287
Figure 6-172 Remove the delivery fan, cartridge fan, and environmental sensor (7 of 9) ............................. 288
Figure 6-173 Remove the delivery fan, cartridge fan, and environmental sensor (8 of 9) ............................. 288
Figure 6-174 Remove the delivery fan, cartridge fan, and environmental sensor (9 of 9) ............................. 289
Figure 6-175 Remove the toner-collection sensor (1 of 4) ............................................................................. 290
Figure 6-176 Remove the toner-collection sensor (2 of 4) ............................................................................. 290
Figure 6-177 Remove the toner-collection sensor (3 of 4) ............................................................................. 291
Figure 6-178 Remove the toner-collection sensor (4 of 4) ............................................................................. 291
Figure 6-179 Remove the residual-toner-feed motor (1 of 7) ......................................................................... 292
Figure 6-180 Remove the residual-toner-feed motor (2 of 7) ......................................................................... 293
Figure 6-181 Remove the residual-toner-feed motor (3 of 7) ......................................................................... 293
Figure 6-182 Remove the residual-toner-feed motor (4 of 7) ......................................................................... 294
Figure 6-183 Remove the residual-toner-feed motor (5 of 7) ......................................................................... 294
Figure 6-184 Remove the residual-toner-feed motor (6 of 7) ......................................................................... 295
Figure 6-185 Remove the residual-toner-feed motor (7 of 7) ......................................................................... 295
Figure 6-186 Reinstall the residual-toner collection door ............................................................................... 296
Figure 6-187 Remove the RD sensor assembly (1 of 6) ................................................................................ 297
Figure 6-188 Remove the RD sensor assembly (2 of 6) ................................................................................ 297
Figure 6-189 Remove the RD sensor assembly (3 of 6) ................................................................................ 298
Figure 6-190 Remove the RD sensor assembly (4 of 6) ................................................................................ 298
Figure 6-191 Remove the RD sensor assembly (5 of 6) ................................................................................ 299
Figure 6-192 Remove the RD sensor assembly (6 of 6) ................................................................................ 299
Figure 6-193 Remove the power-supply fan (1 of 4) ...................................................................................... 300
Figure 6-194 Remove the power-supply fan (2 of 4) ...................................................................................... 301
Figure 6-195 Remove the power-supply fan (3 of 4) ...................................................................................... 301
Figure 6-196 Remove the power-supply fan (4 of 4) ...................................................................................... 302
Figure 6-197 Remove the registration assembly (1 of 8) ............................................................................... 303
Figure 6-198 Remove the registration assembly (2 of 8) ............................................................................... 304
Figure 6-199 Remove the registration assembly (3 of 8) ............................................................................... 304
Figure 6-200 Remove the registration assembly (4 of 8) ............................................................................... 305
Figure 6-201 Remove the registration assembly (5 of 8) ............................................................................... 305
Figure 6-202 Remove the registration assembly (6 of 8) ............................................................................... 306
Figure 6-203 Remove the registration assembly (7 of 8) ............................................................................... 306
Figure 6-204 Remove the registration assembly (8 of 8) ............................................................................... 307
Figure 6-205 Remove the high-voltage power supply lower (1 of 4) .............................................................. 308
Figure 6-206 Remove the high-voltage power supply lower (2 of 4) .............................................................. 309
Figure 6-207 Remove the high-voltage power supply lower (3 of 4) .............................................................. 309
Figure 6-208 Remove the high-voltage power supply lower (4 of 4) .............................................................. 310
Figure 6-209 Reinstall the high-voltage power supply lower .......................................................................... 310
Figure 6-210 Remove the developing-disengagement motor (1 of 2) ............................................................ 311
Figure 6-211 Remove the developing-disengagement motor (2 of 2) ............................................................ 312
Figure 6-212 Remove the pickup motor ......................................................................................................... 313
Figure 6-213 Remove the lifter-drive assembly (1 of 2) ................................................................................. 314
Figure 6-214 Remove the lifter-drive assembly (2 of 2) ................................................................................. 315
Figure 6-215 Remove the cassette-pickup drive assembly (1 of 10) ............................................................. 316
Figure 6-216 Remove the cassette-pickup drive assembly (2 of 10) ............................................................. 317
Figure 6-217 Remove the cassette-pickup drive assembly (3 of 10) ............................................................. 317
Figure 6-218 Remove the cassette-pickup drive assembly (4 of 10) ............................................................. 318
Figure 6-219 Remove the cassette-pickup drive assembly (5 of 10) ............................................................. 318
Figure 6-220 Remove the cassette-pickup drive assembly (6 of 10) ............................................................. 319
Figure 6-221 Remove the cassette-pickup drive assembly (7 of 10) ............................................................. 319
Figure 6-222 Remove the cassette-pickup drive assembly (8 of 10) ............................................................. 320
Figure 6-223 Remove the cassette-pickup drive assembly (9 of 10) ............................................................. 320
Figure 6-224 Remove the cassette-pickup drive assembly (10 of 10) ........................................................... 321
Figure 6-225 Reinstall the cassette-pickup drive assembly (1 of 3) ............................................................... 321
Figure 6-226 Reinstall the cassette-pickup drive assembly (2 of 3) ............................................................... 322
Figure 6-227 Reinstall the cassette-pickup drive assembly (3 of 3) ............................................................... 322
Figure 6-228 Remove the cassette-pickup assembly (1 of 3) ........................................................................ 323
Figure 6-229 Remove the cassette-pickup assembly (2 of 3) ........................................................................ 324
Figure 6-230 Remove the cassette-pickup assembly (3 of 3) ........................................................................ 324
Figure 6-231 Remove the laser/scanner assembly (Y/M) (1 of 12) ............................................................... 325
Figure 6-232 Remove the laser/scanner assembly (Y/M) (2 of 12) ............................................................... 326
Figure 6-233 Remove the laser/scanner assembly (Y/M) (3 of 12) ............................................................... 326
Figure 6-234 Remove the laser/scanner assembly (Y/M) (4 of 12) ............................................................... 327
Figure 6-235 Remove the laser/scanner assembly (Y/M) (5 of 12) ............................................................... 327
Figure 6-236 Remove the laser/scanner assembly (Y/M) (6 of 12) ............................................................... 328
Figure 6-237 Remove the laser/scanner assembly (Y/M) (7 of 12) ............................................................... 328
Figure 6-238 Remove the laser/scanner assembly (Y/M) (8 of 12) ............................................................... 329
Figure 6-239 Remove the laser/scanner assembly (Y/M) (9 of 12) ............................................................... 329
Figure 6-240 Remove the laser/scanner assembly (Y/M) (10 of 12) ............................................................. 330
Figure 6-241 Remove the laser/scanner assembly (Y/M) (11 of 12) ............................................................. 330
Figure 6-242 Remove the laser/scanner assembly (Y/M) (12 of 12) ............................................................. 331
Figure 6-243 Remove the laser/scanner assembly (C/Bk) (1 of 7) ................................................................ 332
Figure 6-244 Remove the laser/scanner assembly (C/Bk) (2 of 7) ................................................................ 333
Figure 6-245 Remove the laser/scanner assembly (C/Bk) (3 of 7) ................................................................ 333
Figure 6-246 Remove the laser/scanner assembly (C/Bk) (4 of 7) ................................................................ 334
Figure 6-247 Remove the laser/scanner assembly (C/Bk) (5 of 7) ................................................................ 334
Figure 6-248 Remove the laser/scanner assembly (C/Bk) (6 of 7) ................................................................ 335
Figure 6-249 Remove the laser/scanner assembly (C/Bk) (7 of 7) ................................................................ 335
Figure 6-250 Reinstall the PGC actuators (1 of 5) ......................................................................................... 336
Figure 6-251 Reinstall the PGC actuators (2 of 5) ......................................................................................... 336
Figure 6-252 Reinstall the PGC actuators (3 of 5) ......................................................................................... 337
Figure 6-253 Reinstall the PGC actuators (4 of 5) ......................................................................................... 337
Figure 6-254 Reinstall the PGC actuators (5 of 5) ......................................................................................... 338
Figure 6-255 Remove the high-voltage power supply upper (1 of 5) ............................................................. 339
Figure 6-256 Remove the high-voltage power supply upper (2 of 5) ............................................................. 340
Figure 6-257 Remove the high-voltage power supply upper (3 of 5) ............................................................. 340
Figure 6-258 Remove the high-voltage power supply upper (4 of 5) ............................................................. 341
Figure 6-259 Remove the high-voltage power supply upper (5 of 5) ............................................................. 341
Figure 6-260 Reinstall the high-voltage power supply upper ......................................................................... 342
Figure 6-261 Remove the drum motor 1 ........................................................................................................ 343
Figure 6-262 Remove the drum motor 2 or drum motor 3 .............................................................................. 344
Figure 6-263 Remove the fuser motor ........................................................................................................... 345
Figure 6-264 Remove the main-drive assembly (1 of 7) ................................................................................ 346
Figure 6-265 Remove the main-drive assembly (2 of 7) ................................................................................ 347
Figure 6-266 Remove the main-drive assembly (3 of 7) ................................................................................ 347
Figure 6-267 Remove the main-drive assembly (4 of 7) ................................................................................ 348
Figure 6-268 Remove the main-drive assembly (5 of 7) ................................................................................ 348
Figure 6-269 Remove the main-drive assembly (6 of 7) ................................................................................ 349
Figure 6-270 Remove the main-drive assembly (7 of 7) ................................................................................ 349
Figure 6-271 Reinstall the main-drive assembly (1 of 11) .............................................................................. 350
Figure 6-272 Reinstall the main-drive assembly (2 of 11) .............................................................................. 350
Figure 6-273 Reinstall the main-drive assembly (3 of 11) .............................................................................. 351
Figure 6-274 Reinstall the main-drive assembly (4 of 11) .............................................................................. 351
Figure 6-275 Reinstall the main-drive assembly (5 of 11) .............................................................................. 352
Figure 6-276 Reinstall the main-drive assembly (6 of 11) .............................................................................. 352
Figure 6-277 Reinstall the main-drive assembly (7 of 11) .............................................................................. 353
Figure 6-278 Reinstall the main-drive assembly (8 of 11) .............................................................................. 353
Figure 6-279 Reinstall the main-drive assembly (9 of 11) .............................................................................. 354
Figure 6-280 Reinstall the main-drive assembly (10 of 11) ............................................................................ 354
Figure 6-281 Reinstall the main-drive assembly (11 of 11) ............................................................................ 355
Figure 6-282 Remove the fuser-drive assembly (1 of 6) ................................................................................ 357
Figure 6-283 Remove the fuser-drive assembly (2 of 6) ................................................................................ 357
Figure 6-284 Remove the fuser-drive assembly (3 of 6) ................................................................................ 358
Figure 6-285 Remove the fuser-drive assembly (4 of 6) ................................................................................ 358
Figure 6-286 Remove the fuser-drive assembly (5 of 6) ................................................................................ 359
Figure 6-287 Remove the fuser-drive assembly (6 of 6) ................................................................................ 359
Figure 6-288 Reinstall the fuser-drive assembly ............................................................................................ 360
Figure 6-289 Remove the delivery assembly (1 of 5) .................................................................................... 362
Figure 6-290 Remove the delivery assembly (2 of 5) .................................................................................... 362
Figure 6-291 Remove the delivery assembly (3 of 5) .................................................................................... 363
Figure 6-292 Remove the delivery assembly (4 of 5) .................................................................................... 363
Figure 6-293 Remove the delivery assembly (5 of 5) .................................................................................... 364
Figure 6-294 Reinstall the delivery assembly (1 of 2) .................................................................................... 365
Figure 6-295 Reinstall the delivery assembly (2 of 2) .................................................................................... 365
Figure 6-296 Remove the duplex-drive assembly (1 of 2) ............................................................................. 367
Figure 6-297 Remove the duplex-drive assembly (2 of 2) ............................................................................. 367
Figure 6-298 Remove the drawer connector; optional paper feeder .............................................................. 368
Figure 7-1 Front-door interlock ....................................................................................................................... 384
Figure 7-2 Right-door interlock ....................................................................................................................... 384
Figure 7-3 Engine-test button ......................................................................................................................... 386
Figure 7-4 Test the TOP sensor ..................................................................................................................... 389
Figure 7-5 Test the loop sensors .................................................................................................................... 390
Figure 7-6 Test the fuser delivery sensor (1 of 2) .......................................................................................... 391
Figure 7-7 Test the fuser (fixing) delivery sensor (2 of 2) ............................................................................... 391
Figure 7-8 Test the duplex re-pickup sensor .................................................................................................. 392
Figure 7-9 Test the output-bin-full sensor ...................................................................................................... 393
Figure 7-10 Test the fuser (fixing) pressure-release sensor (1 of 2) .............................................................. 395
Figure 7-11 Test the fuser (fixing) pressure-release sensor (2 of 2) .............................................................. 395
Figure 7-12 Test the primary transfer-roller disengagement sensor (1 of 2) .................................................. 396
Figure 7-13 Test the primary transfer-roller disengagement sensor (2 of 2) .................................................. 397
Figure 7-14 Test the right- and front-door interlock switches (1 of 4) ............................................................ 398
Figure 7-15 Test the right- and front-door interlock switches (2 of 4) ............................................................ 398
Figure 7-16 Test the right- and front-door interlock switches (3 of 4) ............................................................ 399
Figure 7-17 Test the right- and front-door interlock switches (4 of 4) ............................................................ 399
Figure 7-18 Test the Tray 1 media-present sensor ....................................................................................... 400
Figure 7-19 Test the tray 2 paper-out sensor ................................................................................................ 401
Figure 7-20 Test the Tray 2 closed sensor (1 of 2) ........................................................................................ 402
Figure 7-21 Test the Tray 2 closed sensor (2 of 2) ........................................................................................ 402
Figure 7-22 Test the Tray 2 stack-surface sensor .......................................................................................... 403
Figure 7-23 Test the optional Tray 3-empty sensor ....................................................................................... 404
Figure 7-24 Test the optional Tray 3 media-feed sensor .............................................................................. 405
Figure 7-25 Test the optional Tray 3 stack-surface sensor ........................................................................... 406
Figure 7-26 Test the optional Tray 3 media-size sensors .............................................................................. 407
Figure 7-27 Formatter PCA ............................................................................................................................ 411
Figure 7-28 DC controller PCA ....................................................................................................................... 412
Figure 7-29 Paper feeder driver PCA ............................................................................................................ 413
Figure 7-30 Component locations (1 of 5) ...................................................................................................... 414
Figure 7-31 Component locations (2 of 5) ...................................................................................................... 415
Figure 7-32 Component locations (3 of 5) ...................................................................................................... 415
Figure 7-33 Component locations (4 of 5) ...................................................................................................... 416
Figure 7-34 Component locations (5 of 5) ...................................................................................................... 417
Figure 7-35 1 x 500 paper feeder ................................................................................................................... 420
Figure 7-36 Sensors ...................................................................................................................................... 421
Figure 7-37 General timing chart .................................................................................................................... 423
Figure 7-38 General circuit diagram (1 of 2) .................................................................................................. 424
Figure 7-39 General circuit diagram (2 of 2) .................................................................................................. 425
Figure 7-40 Product circuit block diagram ...................................................................................................... 425
Figure 7-41 Paper feeder circuit diagram ....................................................................................................... 426
Figure 7-42 Repetitive defects ruler ............................................................................................................... 428
Figure 7-43 Print-quality troubleshooting procedure ...................................................................................... 431
Figure 7-44 Yellow print-quality troubleshooting page ................................................................................... 432
Figure 7-45 Yellow comparison page ............................................................................................................. 432
Figure 7-46 Black print-quality troubleshooting page ..................................................................................... 433
Figure 7-47 Configuration page ..................................................................................................................... 436
Figure 7-48 HP embedded Jetdirect page ..................................................................................................... 438
Figure 7-49 Embedded protocol page ........................................................................................................... 439
Figure 7-50 Jam locations .............................................................................................................................. 473
Figure 8-1 ADF/scanner assembly ................................................................................................................. 520
Figure 8-2 External covers, panels, and doors .............................................................................................. 522
Figure 8-3 Right door assembly ..................................................................................................................... 524
Figure 8-4 Internal components (1 of 5) ......................................................................................................... 526
Figure 8-5 Internal components (2 of 5) ......................................................................................................... 528
Figure 8-6 Internal components (3 of 5) ......................................................................................................... 530
Figure 8-7 Internal components (4 of 5) ......................................................................................................... 532
Figure 8-8 Internal components (5 of 5) ......................................................................................................... 534
Figure 8-9 Fuser ............................................................................................................................................. 536
Figure 8-10 250-sheet cassette ...................................................................................................................... 538
Figure 8-11 250-sheet cassette paper pickup assembly ................................................................................ 540
Figure 8-12 Registration assembly ................................................................................................................. 542
Figure 8-13 Paper-delivery assembly ............................................................................................................. 544
Figure 8-14 PCAs ........................................................................................................................................... 546
Figure 8-15 Formatter components ................................................................................................................ 548
Figure 8-16 500-sheet paper feeder .............................................................................................................. 550
Figure 8-17 Paper feeder main body ............................................................................................................. 552
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