Konica Minolta bizhub 4700P User manual

2015.11
Ver. 1.2
SERVICE MANUAL
SERVICE MANUAL

Trademarks
KONICA MINOLTA and KONICA MINOLTA logo are trademarks or resisted trademarks of KONICA
MINOLTA, INC.
bizhub is trademarks or resisted trademarks of KONICA MINOLTA, INC.
Mac and the Mac logo are trademarks of Apple Inc., registered in the U.S. and other countries.
PCL® is a registered trademark of the Hewlett-Packard Company. PCL is Hewlett-Packard Company’s
designation of a set of printer commands (language) and functions included in its printer products. This
printer is intended to be compatible with the PCL language. This means the printer recognizes PCL
commands used in various application programs, and that the printer emulates the functions
corresponding to the commands.
All other trademarks are the property of their respective owners.
© 2015 KONICA MINOLTA, INC.
All rights reserved.

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Contents
Trademarks................................................................................................................................................ 1
1. Notices and safety information ....................................................................................................... 10
1.1 Laser notices............................................................................................................................ 10
1.2 Safety ....................................................................................................................................... 13
2. Preface............................................................................................................................................ 17
2.1 Service manual conventions .................................................................................................... 17
2.2 Change History......................................................................................................................... 18
3. General information ........................................................................................................................ 19
3.1 Media guidelines ...................................................................................................................... 19
3.1.1 Paper guidelines............................................................................................................ 19
3.1.2 Using recycled paper and other office papers............................................................... 21
3.1.3 Using specialty media.................................................................................................... 22
3.1.4 Supported paper sizes, types, and weights................................................................... 24
3.2 Data security notice.................................................................................................................. 27
3.3 Tools required for service......................................................................................................... 27
4. Diagnostic information .................................................................................................................... 28
4.1 Troubleshooting overview ........................................................................................................ 28
4.1.1 Performing the initial troubleshooting check.................................................................. 28
4.1.2 Power-on Reset (POR) sequence................................................................................. 28
4.2 Fixing print quality issues ......................................................................................................... 29
4.2.1 Initial print quality check................................................................................................. 29
4.2.2 Gray background or toner fog on prints......................................................................... 30
4.2.3 Printer is printing blank pages ....................................................................................... 31
4.2.4 Printer is printing solid black pages............................................................................... 32
4.2.5 Repeating defects.......................................................................................................... 33
4.2.6 Shadow images appear on prints.................................................................................. 34
4.2.7 Skewed print.................................................................................................................. 35
4.2.8 Streaked horizontal or vertical lines appear on prints ................................................... 37
4.2.9 Toner rubs off ................................................................................................................ 38
4.2.10 Toner specks appear on prints...................................................................................... 39
4.3 Paper jams ............................................................................................................................... 40
4.3.1 Avoiding jams ................................................................................................................ 40

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4.3.2 Understanding jam messages and locations................................................................. 42
4.3.3 200 paper jams.............................................................................................................. 43
4.3.4 201 paper jams.............................................................................................................. 53
4.3.5 202 paper jams.............................................................................................................. 54
4.3.6 23y paper jams .............................................................................................................. 58
4.3.7 241 paper jams.............................................................................................................. 61
4.3.8 242-244 paper jams....................................................................................................... 67
4.3.9 250 paper jams.............................................................................................................. 75
4.4 Understanding the printer messages ....................................................................................... 78
4.5 User attendance messages (0–99.99)..................................................................................... 89
4.5.1 User attendance messages (0-99.99) ........................................................................... 89
4.6 Printer hardware errors ............................................................................................................ 98
4.6.1 111 errors....................................................................................................................... 98
4.6.2 121 errors..................................................................................................................... 100
4.6.3 126 errors..................................................................................................................... 102
4.6.4 132 errors..................................................................................................................... 103
4.6.5 133 errors..................................................................................................................... 104
4.6.6 140 errors..................................................................................................................... 105
4.6.7 146 errors..................................................................................................................... 106
4.6.8 155 errors..................................................................................................................... 107
4.6.9 171 errors..................................................................................................................... 110
4.6.10 900 errors..................................................................................................................... 113
4.6.11 912 errors..................................................................................................................... 118
4.6.12 94y errors..................................................................................................................... 119
4.6.13 950–958 errors ............................................................................................................ 120
4.6.14 959 errors..................................................................................................................... 123
4.6.15 96y errors..................................................................................................................... 124
4.6.16 97y errors..................................................................................................................... 126
4.6.17 98y errors..................................................................................................................... 127
4.6.18 99y errors..................................................................................................................... 129
4.7 Symptoms............................................................................................................................... 129
4.7.1 Base printer symptoms................................................................................................ 129
4.7.2 Dead machine service check....................................................................................... 130

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4.7.3 Controller board service check.................................................................................... 130
4.7.4 Control panel button service check ............................................................................. 132
4.7.5 Control panel service check......................................................................................... 133
4.7.6 Toner starvation service check.................................................................................... 133
4.7.7 USB print service check............................................................................................... 134
4.7.8 Network service check................................................................................................. 136
4.8 Input option hardware errors.................................................................................................. 139
4.8.1 3xx error messages..................................................................................................... 139
4.8.2 Option tray pick/lift section service check.................................................................... 141
4.8.3 Option tray separator/pass-through motor service check............................................ 141
4.8.4 Option tray ACM motor service check......................................................................... 142
4.8.5 Option tray controller card service check .................................................................... 143
5. Service menus .............................................................................................................................. 144
5.1 Understanding the control panel and menus ......................................................................... 144
5.1.1 Using the printer control panel..................................................................................... 144
5.1.2 Understanding the colors of the indicator and Sleep button lights.............................. 145
5.2 Menus list ............................................................................................................................... 146
5.3 Diagnostics menu................................................................................................................... 147
5.3.1 Entering the Diagnostics menu.................................................................................... 147
5.3.2 Registration.................................................................................................................. 147
5.3.3 Print Tests.................................................................................................................... 148
5.3.4 Hardware Tests ........................................................................................................... 148
5.3.5 Duplex Tests................................................................................................................ 150
5.3.6 Input tray tests ............................................................................................................. 152
5.3.7 Output Bin Tests.......................................................................................................... 153
5.3.8 Base Sensor Test ........................................................................................................ 153
5.3.9 Device Tests................................................................................................................ 154
5.3.10 Printer Setup................................................................................................................ 155
5.3.11 EP Setup...................................................................................................................... 156
5.3.12 Reports ........................................................................................................................ 158
5.3.13 Event Log..................................................................................................................... 158
5.3.14 Exit Diags..................................................................................................................... 159
5.4 Configuration menu................................................................................................................ 160

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5.4.1 Entering the Configuration menu................................................................................. 160
5.4.2 Maintenance Counter Value........................................................................................ 160
5.4.3 Reset Maintenance Counter........................................................................................ 160
5.4.4 Print Quality Pages...................................................................................................... 160
5.4.5 Reports ........................................................................................................................ 161
5.4.6 Panel Menus................................................................................................................ 161
5.4.7 Tray Linking ................................................................................................................. 161
5.4.8 PPDS Emulation.......................................................................................................... 162
5.4.9 Download Emuls.......................................................................................................... 162
5.4.10 Safe Mode.................................................................................................................... 162
5.4.11 Factory Defaults........................................................................................................... 162
5.4.12 Energy Conserve......................................................................................................... 162
5.4.13 Paper Prompts............................................................................................................. 163
5.4.14 Envelope Prompts ....................................................................................................... 163
5.4.15 Action for Prompts ....................................................................................................... 164
5.4.16 Wipe All Settings.......................................................................................................... 164
5.4.17 Font Density................................................................................................................. 164
5.4.18 Font Sharpening .......................................................................................................... 164
5.4.19 Reduced Curl............................................................................................................... 165
5.4.20 A5 Loading................................................................................................................... 165
5.4.21 UI Automation.............................................................................................................. 165
5.4.22 Clear Supply Usage History......................................................................................... 165
5.4.23 Clear Custom Status.................................................................................................... 166
5.4.24 USB Speed.................................................................................................................. 166
5.4.25 Automatically Display Error Screens ........................................................................... 166
5.4.26 USB PnP...................................................................................................................... 166
5.4.27 Exit Config menu ......................................................................................................... 167
5.5 Entering Invalid engine mode................................................................................................. 167
5.6 Entering Recovery mode........................................................................................................ 167
5.7 Accessing the Network SE menu........................................................................................... 168
5.8 Service Engineer menu.......................................................................................................... 168
5.8.1 Accessing the service engineer (SE) menu................................................................. 168
5.9 Updating the printer firmware................................................................................................. 169

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5.9.1 Confirming the firmware version.................................................................................. 169
5.9.2 Procedures for updating the firmware via USB flash/thumb drive............................... 169
5.9.3 Procedures for updating the firmware via USB connection......................................... 171
5.9.4 Procedures for updating the firmware via network connection.................................... 173
5.9.5 Procedures for rewriting the firmware in recovery mode............................................. 174
6. Repair information......................................................................................................................... 175
6.1 Removal precautions.............................................................................................................. 175
6.1.1 Data security notice ..................................................................................................... 175
6.1.2 Handling ESD-sensitive parts...................................................................................... 175
6.1.3 Controller board/control panel replacement ................................................................ 176
6.1.4 Ribbon cable connectors............................................................................................. 176
6.1.5 Printhead assembly adjustments................................................................................. 187
6.2 Removal procedures .............................................................................................................. 190
6.3 Left side removals .................................................................................................................. 190
6.3.1 Left cover removal....................................................................................................... 190
6.3.2 Main drive gearbox removal ........................................................................................ 191
6.3.3 MPF gearbox removal ................................................................................................. 193
6.3.4 Reverse solenoid removal........................................................................................... 196
6.3.5 Cartridge gearbox removal.......................................................................................... 196
6.3.6 Duplex gear assembly removal ................................................................................... 197
6.4 Right side removals................................................................................................................ 199
6.4.1 Right cover removal..................................................................................................... 199
6.4.2 Tray present sensor removal....................................................................................... 199
6.4.3 Cooling fan duct removal............................................................................................. 200
6.4.4 Cooling fan removals................................................................................................... 200
6.4.5 Controller board removals ........................................................................................... 201
6.4.6 Toner cartridge smart chip contact removal................................................................ 202
6.5 Front removals ....................................................................................................................... 205
6.5.1 Left front mount removal.............................................................................................. 205
6.5.2 Right front mount removal ........................................................................................... 206
6.5.3 Transfer roll removal.................................................................................................... 207
6.5.4 Cartridge plunger removal........................................................................................... 208
6.5.5 Bezel removals ............................................................................................................ 210

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6.5.6 Nameplate removals.................................................................................................... 210
6.5.7 Control panel assembly removals ............................................................................... 211
6.5.8 UICC removals ............................................................................................................ 213
6.5.9 Control panel USB port removal (bizhub 4700P only)................................................. 214
6.5.10 MPF assembly removal ............................................................................................... 215
6.5.11 MPF pick roller cover removal..................................................................................... 217
6.5.12 MPF pick roller removal............................................................................................... 217
6.5.13 Bail removal................................................................................................................. 218
6.5.14 Jam access cover removal.......................................................................................... 218
6.5.15 Front door removal ...................................................................................................... 219
6.5.16 Front access cover removal......................................................................................... 221
6.5.17 Front door sensor removal........................................................................................... 222
6.5.18 Front input guide removal............................................................................................ 222
6.5.19 Separator pad removal ................................................................................................ 224
6.6 Bottom removals .................................................................................................................... 227
6.6.1 Power supply removals................................................................................................ 227
6.6.2 Power supply shield removal....................................................................................... 228
6.6.3 Duplex removal............................................................................................................ 229
6.6.4 Duplex sensor and input sensor removal.................................................................... 231
6.6.5 Index sensor removal .................................................................................................. 233
6.6.6 Toner density sensor removal ..................................................................................... 233
6.6.7 Media present sensor removal .................................................................................... 234
6.6.8 Trailing edge sensor removal ...................................................................................... 236
6.6.9 Media present flag removal ......................................................................................... 236
6.6.10 ACM assembly removal............................................................................................... 240
6.6.11 Pick/Lift motor gearbox removal.................................................................................. 241
6.7 Rear side removals ................................................................................................................ 243
6.7.1 Dust cover removal...................................................................................................... 243
6.7.2 Rear door and cover removal...................................................................................... 243
6.7.3 Narrow media/bin full sensor removal ......................................................................... 244
6.7.4 Redrive assembly removal .......................................................................................... 245
6.7.5 Fuser removal.............................................................................................................. 246
6.8 Top side removals.................................................................................................................. 247

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6.8.1 Top cover removal....................................................................................................... 247
6.8.2 Laser scanning unit (LSU) removal ............................................................................. 248
6.9 250/550-sheet tray removals.................................................................................................. 249
6.9.1 Pick roller removal ....................................................................................................... 249
6.9.2 Separator roll assembly removal................................................................................. 249
6.9.3 ACM assembly removal............................................................................................... 251
7. Component locations.................................................................................................................... 255
7.1 Exterior locations.................................................................................................................... 255
7.1.1 Front view (bizhub 4000P)........................................................................................... 255
7.1.2 Front view (bizhub 4700P)........................................................................................... 256
7.1.3 Rear view..................................................................................................................... 257
8. Maintenance ................................................................................................................................. 258
8.1 Inspection guide ..................................................................................................................... 258
8.1.1 Scheduled maintenance.............................................................................................. 259
8.1.2 Maintenance kit............................................................................................................ 259
8.1.3 Resetting the maintenance counter............................................................................. 259
8.2 Lubrication specification......................................................................................................... 259
8.3 Cleaning the printer................................................................................................................ 260
9. Electrical parts layout.................................................................................................................... 261
10. Printer specifications ................................................................................................................ 263
10.1 Product power consumption................................................................................................... 263
10.2 Electrical specifications .......................................................................................................... 263
10.3 Operating clearances ............................................................................................................. 264
10.4 Acoustics................................................................................................................................ 265
10.5 Operating environment........................................................................................................... 266
11. Options and features ................................................................................................................ 267
11.1 Available internal options ....................................................................................................... 267
11.2 Media handling options .......................................................................................................... 267
12. Theory of operation .................................................................................................................. 268
12.1 POR sequence....................................................................................................................... 268
12.2 Printer control......................................................................................................................... 268
12.3 Paper path information........................................................................................................... 268
12.3.1 Input tray...................................................................................................................... 268

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12.3.2 Multipurpose feeder (MPF).......................................................................................... 268
12.3.3 Simplex printing ........................................................................................................... 269
12.3.4 Duplex printing............................................................................................................. 270
12.4 Media handling components .................................................................................................. 270
12.4.1 Main drive gearbox ...................................................................................................... 270
12.4.2 Autocompensator mechanism (ACM).......................................................................... 270
12.5 Key components..................................................................................................................... 271
12.5.1 Sensors........................................................................................................................ 271
12.5.2 Other key components................................................................................................. 272
12.6 Electrophotographic process (EP process)............................................................................ 273
12.6.1 Printhead...................................................................................................................... 273
12.6.2 Step 1: Charge............................................................................................................. 274
12.6.3 Step 2: Expose ............................................................................................................ 274
12.6.4 Step 3: Develop ........................................................................................................... 275
12.6.5 Step 4: Transfer........................................................................................................... 275
12.6.6 Step 5: Clean............................................................................................................... 276
13. Acronyms.................................................................................................................................. 277
13.1 Acronyms................................................................................................................................ 277