Epson AcuLaser M4000N, Service Manual

Page: 15 / 477

EPSON EPL-N3000/AcuLaser M4000N Revision C
15
Confidential
3.4.35 SOLENOID ASSY GATE ................................................................... 140
3.4.36 S/W REAR COVER ............................................................................. 141
3.4.37 SENSOR OCT ...................................................................................... 142
3.4.38 Sensor Full Stack (on PWBA OCT) ..................................................... 143
3.4.39 Sensor Offset (on PWBA OCT) ........................................................... 143
3.5 Picture Image Trouble ................................................................................... 144
3.5.1 Overview ................................................................................................. 144
3.5.2 Too Light Print (Weak Gradation) ......................................................... 145
3.5.3 Blank Print .............................................................................................. 146
3.5.4 Solid Black .............................................................................................. 147
3.5.5 White or Light Bands (parallel with paper transport) ............................. 148
3.5.6 White or Light Bands (perpendicular to paper transport) ....................... 149
3.5.7 Black Stripes (parallel with paper transport) .......................................... 150
3.5.8 Black Stripes (perpendicular to paper transport) .................................... 151
3.5.9 Image Partial Missing (White Spots) ...................................................... 153
3.5.10 Black Spots ........................................................................................... 154
3.5.11 Ghost Image .......................................................................................... 155
3.5.12 Fog ........................................................................................................ 156
3.5.13 Skew ..................................................................................................... 157
3.5.14 Damaged Paper (Wrinkling) ................................................................. 158
3.5.15 Bad Fusing ............................................................................................ 159
Chapter 4 Disassembly and Assembly
4.1 Overview .......................................................................................................... 161
4.1.1 Precautions .............................................................................................. 161
4.1.2 Precautions in Performing Work ............................................................ 162
4.1.3 Disassembly and Reassembly Procedure ............................................... 163
4.1.4 Difference between EPL-N3000 and AcuLaser M4000N in Disassembly/
Assembly ................................................................................................. 164
4.2 Cover ................................................................................................................ 167
4.2.1 COVER REAR ....................................................................................... 167
4.2.2 COVER RIGHT ..................................................................................... 168
4.2.3 COVER LEFT ........................................................................................ 169
4.2.4 COVER TOP, CONTROL PANEL ....................................................... 170
4.2.5 COVER FRONT ..................................................................................... 172
4.2.6 SWITCH I/L ASSY ................................................................................ 173
4.3 150 Paper Cassette .......................................................................................... 175
4.3.1 ROLL ASSY RETARD .......................................................................... 175
4.3.2 RACK SIZE ............................................................................................ 177
4.3.3 GEAR SECTOR ..................................................................................... 181
4.3.4 GUIDE ASSY END 150 ........................................................................ 183
4.3.5 PLATE ASSY BTM ............................................................................... 185
4.3.6 GEAR LEVER LOCK, LEVER BTM LOCK ....................................... 188
4.3.7 HANDLE EXTENTION 150 ................................................................. 190
4.4 550 Paper Cassette .......................................................................................... 191
4.4.1 ROLL ASSY RETARD .......................................................................... 191
4.4.2 RACK SIZE ............................................................................................ 192
4.4.3 GEAR SECTOR ..................................................................................... 196
4.4.4 GUIDE ASSY END 550 ........................................................................ 198
4.4.5 PLATE ASSY BTM ............................................................................... 200
4.4.6 GEAR LEVER LOCK, LEVER BTM LOCK ....................................... 203
4.4.7 HANDLE EXTENSION 550 ................................................................. 206
4.4.8 GUIDE INDICATOR 3 .......................................................................... 207
4.4.9 GUIDE INDICATOR 2 .......................................................................... 208
4.4.10 LOW IND FRONT ............................................................................... 210
4.5 150 Paper Feeder ............................................................................................ 211
4.5.1 150 FEEDER ASSY ............................................................................... 211
4.5.2 ROLL ASSY NUDGER, ROLL ASSY FEED ...................................... 213
4.5.3 CLUTCH ONEWAY NUDGER ............................................................ 214
4.5.4 ROLL ASSY GEAR NUDGER ............................................................. 215