HP LaserJet 4100 Manuel de service Page 81
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EN Chapter 3 Printer operation 79
Resetting the printer
Cold reset
Cold reset clears all data from the printer memory and sets many of the defaults back to the factory
settings.
CAUTION Performing a cold reset resets the HP JetDirect configuration. To avoid making changes to your
configuration, remove the HP JetDirect card before performing a cold reset.
If possible, print a configuration page and a menu map to verify the current printer settings. Use the
information on these pages to reset the customer’s printer settings.
To perform a cold reset:
1 Print a configuration page and a menu map.
2 Turn on the printer while holding the G
O
key down.
3 When
COLD RESET
appears on the control panel display, release the G
O
key.
Clearing NVRAM
This procedure will clean up the NVRAM by removing old areas that are not being used.
1 Turn off the printer.
2 Hold down the C
ANCEL
J
OB
key, and then turn on the printer.
3 When
CLEANUP NVRAM
appears on the control panel display, release the C
ANCEL
J
OB
key.
Initialization of NVRAM
Initialization of NVRAM should always be executed immediately after replacing the formatter board.
This procedure aligns the firmware with the formatter. Not initializing NVRAM could result in
deterioration of print quality.
CAUTION Initializing NVRAM will erase several of the memory settings (including page count, printer serial
number, and the event log).
Note Before initializing NVRAM, print a configuration page and a menu map to verify the current printer
settings. Use the information on these pages to reset the customer’s printer settings.
To initialize NVRAM
1 Print a configuration page and a menu map.
2 Turn off the printer.
3 Remove all formatter accessories (EIO cards, hard drive, DIMMs, etc.).
4 While turning on the printer, hold down S
ELECT
and C
ANCEL
J
OB
until all of the lights on the
control panel are lit.
5 Press C
ANCEL
J
OB
, and then S
ELECT
. The
NVRAM INIT
message appears on the control panel
display.
6 After initializing the NVRAM, use service mode to reenter the settings from the configuration
page.
- Service Manual _____________ 3
- Contents 5
- 4 Printer maintenance 6
- 5 Theory of operation 6
- 7 Troubleshooting 8
- 8 Parts and diagrams 8
- 10 Figures EN 12
- Printer description 15
- Printer features 16
- Product compatibility matrix 20
- Identification 22
- Site requirements 23
- Installation requirements 24
- Environmental requirements 26
- Print media specifications 27
- Types of print media to avoid 31
- Weight equivalence table 32
- Adhesive labels 33
- Overhead transparencies 34
- Envelopes 35
- Envelope specifications 36
- Card stock and heavy paper 37
- Safety information 38
- Laser safety 39
- Regulatory information 39
- 38 Printer description EN 40
- Service approach 41
- Parts and supplies 42
- Printer documentation 43
- Exchange program 44
- Consumables 44
- World Wide Web 44
- Toner cartridge information 46
- Warranty statement 47
- 46 Service approach EN 48
- Printer operation 49
- 48 Printer operation EN 50
- Using the control panel 51
- Control panel keys 52
- Settings and defaults 53
- Control panel menus 54
- Quick copy jobs menu 55
- Private/stored jobs menu 56
- Information menu 57
- Paper-handling menu 59
- Printing menu 62
- Print quality menu 65
- Configuration menu 68
- I/O menu 71
- EIO menu (networked printers) 72
- Resets menu 75
- Service mode 76
- Service menu 77
- Testing the printer 80
- Resetting the printer 81
- System configuration 82
- Printer maintenance 83
- Using the auto-cleaning page 86
- Cleaning spilled toner 87
- PERFORM PRINTER MAINTENANCE 88
- Expected life of components 89
- 88 Printer maintenance EN 90
- Theory of operation 91
- Power supply system 93
- Toner-cartridge detection 96
- Engine controller system 97
- 96 Theory of operation EN 98
- 98 Theory of operation EN 100
- 100 Theory of operation EN 102
- Laser/scanner drive 103
- Engine test print 103
- 102 Theory of operation EN 104
- Figure 17. Main motor control 104
- Formatter system 106
- EconoMode 107
- Input/output 107
- Printer memory 108
- DIMM slots 108
- PJL overview 109
- Control panel 109
- Image formation system 110
- Toner cartridge 111
- Photosensitive 112
- Aluminum 112
- Conditioning the drum 113
- Writing the image 114
- Developing the image 115
- Transferring the image 116
- Variable fusing temperature 118
- Paper feed system 119
- 118 Theory of operation EN 120
- Figure 29. Paper path 121
- Clutches and sensors 122
- Printing from tray 1 122
- Printing from tray 2 124
- Pickup and feeding 127
- 126 Theory of operation EN 128
- Figure 36. Paper feed pickup 128
- Envelope feeder 129
- Duplexer 129
- Other controls 131
- Basic sequence of operation 132
- Figure 38. Timing diagram 133
- 132 Theory of operation EN 134
- Removing and replacing parts 135
- Required tools 138
- Removing covers 140
- Control panel board 142
- Top cover 143
- Left side cover 145
- Front right side cover 146
- Rear cover/rear output bin 147
- Removing internal assemblies 151
- Firmware DIMM 152
- Formatter assembly 153
- Output delivery assembly 154
- Laser/scanner 156
- Cartridge memory 157
- Main motor 160
- Transfer roller 161
- Tray 1 pickup roller 162
- Tray 1 pickup assembly 163
- Registration assembly 167
- Paper feed assembly 169
- Delivery drive assembly 172
- Engine controller board 175
- Adjusting the top margin 177
- Paper-feed guide assembly 178
- Removing tray assemblies 179
- Troubleshooting 185
- Troubleshooting process 186
- Troubleshooting flowchart 187
- 186 Troubleshooting EN 188
- Preliminary operating checks 189
- Power on 190
- Engine test 192
- Event log 193
- Print the event log 194
- Display the event log 194
- Interpret the event log 194
- Printer messages 195
- Information pages 224
- Embedded Web server 226
- Embedded Web server page sets 226
- Home page set 227
- Configuration page 228
- Image quality 229
- Check the toner cartridge 230
- Image defects 232
- Repetitive defect ruler 245
- Image system troubleshooting 246
- Reference diagrams 248
- 248 Troubleshooting EN 250
- 250 Troubleshooting EN 252
- Paper path 254
- Motors and fans 259
- Connectors 260
- 260 Troubleshooting EN 262
- Figure 112. Location of PCAs 263
- Solenoids and clutch 268
- 268 Troubleshooting EN 270
- Parts and diagrams 271
- Ordering parts 272
- Ordering consumables 272
- Accessories and supplies 273
- Illustrations and parts lists 276
- Firmware DIMM kit 278
- 278 Parts and diagrams EN 280
- 280 Parts and diagrams EN 282
- 282 Parts and diagrams EN 284
- 284 Parts and diagrams EN 286
- 286 Parts and diagrams EN 288
- 292 Parts and diagrams EN 294
- 298 Parts and diagrams EN 300
- 300 Parts and diagrams EN 302
- 304 Parts and diagrams EN 306
- Alphabetical parts list 308
- Numerical parts list 315
- 320 Parts and diagrams EN 322
- EN Index 321 323
- Numerics 323
- 322 Index EN 324
- EN Index 323 325
- 324 Index EN 326
- EN Index 325 327
- 326 Index EN 328
- EN Index 327 329
- 328 Index EN 330
- EN Index 329 331
- 330 Index EN 332
- EN Index 331 333
- 332 Index EN 334
- *C8049 * 336
- *C * 336
- 8049-90920 336
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