HP LaserJet 5000gn User Manual Page 295
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- Table of contents
- TROUBLESHOOTING
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7-74 Troubleshooting
EN
Image System Troubleshooting
Half Self-Test Functional Check
The electrophotographic process can be subdivided into the following
stages:
●
Cleaning (removes excess toner from drum surface)
●
Conditioning (places a uniform electrical charge on drum)
●
Writing (laser strikes surface of drum to create latent image)
●
Developing (forms the toner image on drum)
●
Transferring (charges transfer the image to paper)
●
Fusing (heat and pressure produces a permanent image)
The purpose of the Half Self Test Check is to determine which
process is malfunctioning. Perform the test as follows:
1 Print a Configuration Page from the Control Panel INFORMATION
MENU.
2 Open the top cover after the paper advances half-way through the
printer (about five seconds after the Main Motor begins rotation).
The leading edge of the paper should have advanced past the
Toner Cartridge.
3 Remove the Toner Cartridge.
4 Open the Toner Cartridge’s drum shield to view the drum’s
surface.
If a dark and distinct toner image is present on the drum’s surface,
assume that the first four functions of the electrophotographic process
are functioning (cleaning, conditioning, writing, and developing - see
Chapter 5), and troubleshoot the failure as a transfer or fusing
problem.
If no image is present on the photosensitive drum, perform all the
following functional checks:
- HP LaserJet 5000, 5000 N 1
- Service Manual 1
- 5000 GN Printers 2
- Service Manual _____________ 2
- Contents 4
- 3 Printer Operation 5
- 4 Printer Maintenance 5
- 5 Functional Information 6
- 7 Troubleshooting 8
- 8 Parts and Diagrams 8
- 6 Contents 9
- Printer Description 10
- Printer Features 11
- Identification 14
- Site Requirements 15
- Space Requirements 16
- 1-8 Printer Description 17
- Environmental Requirements 19
- Paper Specifications 20
- Supported Types of Paper 23
- Guidelines for Using Paper 24
- Transparencies 27
- Envelopes 28
- Acceptable 28
- Unacceptable 28
- Card Stock and Heavy Paper 29
- Card Stock Construction 30
- Card Stock Guidelines 30
- Safety Information 31
- FCC Regulations 32
- Laser statement for Finland 33
- Luokan 1 laserlaite 33
- Material Safety Data Sheet 34
- Protecting the Environment 35
- Service Approach 36
- Parts and Supplies 38
- Helpful Documentation 39
- Phone Numbers for Ordering 40
- Exchange Program 40
- Consumables 40
- Technical Assistance 40
- HP FIRST 41
- HP CompuServe Forum 41
- Toner Cartridge Information 43
- Warranty Statement 44
- 2-10 Service Approach 45
- Printer Operation 46
- Using the Control Panel 47
- Control Panel Keys 48
- Settings and Defaults 49
- Control Panel Menus 50
- Information Menu 51
- Paper Handling Menu 52
- Print Quality Menu 55
- Printing Menu 58
- PCL SYMBOL 60
- SET=PC-8 60
- 3-16 Printer Operation 61
- Item Values Explanation 61
- Configuration Menu 62
- I/O Menu 69
- EIO Menu (Networked Printers) 72
- Resets Menu 74
- Service Mode 75
- Service Menu 76
- Page Count 77
- Cold Reset Paper 79
- Diagnostics 79
- Clear Event Log 79
- Testing the Printer 80
- Resetting the Printer 81
- System Configuration 82
- Serial MS-DOS Commands 83
- Printer I/O Configuration 84
- Pacing (Handshaking) 85
- Printer Maintenance 86
- Cleaning Spilled Toner 89
- Preventative Maintenance 90
- 6 Transfer Charging 91
- Functional Information 92
- Printer Subsystems 93
- Power Supply System 94
- Toner Cartridge Detection 98
- DC Controller System 98
- Laser and Scanner Drive 99
- Engine Test Print 100
- Formatter System 103
- EconoMode 104
- Input/Output 105
- Printer Memory 106
- Random Access Memory (RAM) 106
- DIMM Slots 107
- Page Protect 107
- PJL Overview 108
- Control Panel 108
- Image Formation System 109
- Toner Cartridge 111
- Photosensitive Drum 112
- Photosensitive 112
- Aluminum 112
- Cleaning the Drum 113
- Conditioning the Drum 114
- Writing the Image 115
- Developing the Image 116
- Transferring the Image 117
- Variable Fusing Temperature 119
- Paper Feed System 120
- Clutches and Sensors 121
- Printing from Tray 1 122
- 5-32 Functional Information 123
- Figure 5-17 Tray 1 Pickup 123
- Printing from Tray 2 124
- 5-34 Functional Information 125
- 250-sheet Trays 126
- 5-36 Functional Information 127
- Paper Jam 128
- Duplexer 129
- Figure 5-22 130
- Paper Feed for the Duplexer 130
- Figure 5-24 132
- Duplexing Unit 132
- Uncurling Function 133
- Paper Jam in the Duplexer 135
- Basic Sequence of Operation 136
- 5-46 Functional Information 137
- Table 5-1. Printer Timing 137
- Period Timing Purpose Remark 137
- Figure 5-27 138
- Timing Diagram 138
- 5-48 Functional Information 139
- Removing and 140
- Replacing Parts 140
- User Installable Accessories 141
- Checking Memory Installation 144
- Required Tools 146
- Phillips Posidriv 147
- Removing Covers 149
- Top Cover 151
- A Top screws 152
- B Toner Cartridge Drive Arm 152
- C Rear screws 152
- Item Explanation 155
- Toner Cartridge Door Assembly 156
- Front Cover and Tray 1 157
- Front Cover 157
- Tray 1 Guide 157
- Front Cover Pins 159
- Face Down Assembly 160
- Locking Tabs 160
- Locator Pins 161
- Left and Right Side Covers 162
- Tray 1 Inner Cover 163
- Right and Left Corner Covers 165
- Corner Cover Screws 165
- Removing Assemblies 166
- Transfer Roller Assembly 167
- Transfer Guide 167
- Cleaning Brush 168
- Pressure Release Handles 169
- Screw driver lifting point 169
- Paper Handling PCA 170
- Ribbon Cable 170
- Top Margin Adjustment 171
- Figure 6-25 172
- Location of VR401 172
- Main Gear Assembly 173
- Main Motor Cables 173
- Self-tapping Screws 173
- Grounding Screw 173
- Locating Tab 174
- Engagement Arm 174
- Pickup Gear Assembly 175
- Location to Release Spring 176
- Tray 2 Shaft Gear 176
- Wire Clip 176
- Tray 1 Pickup Solenoid 177
- Power Cables 178
- Formatter Assembly 179
- Tray 1 Roller 180
- Tray 2 Roller 181
- Tab is behind this cam 181
- Bushings 181
- Paper Feed Roller Assembly 182
- Machine Screws 186
- Lock Washer/Grounding Wire 186
- Long Screws 187
- Power Supply PCA 188
- DC Controller PCA 188
- Paper Feed Belt Assembly 189
- Use Caution 190
- Tray 1 Shaft 191
- Locking Tab 191
- Tray 1 Shaft Gear 192
- Tray 1 Release Tabs 192
- Tray 2 Shaft 193
- Release Tabs 193
- Solenoid Arm 193
- Direction to Orient Shaft 194
- Tray 1 Lift Plate 195
- Paper Sensor Flag Slot 195
- Tray 1 Separation Pad 196
- Paper Guide 197
- Green Handles 197
- End Pins 197
- Paper Path Detect Sensor 198
- Face Down Bin Full Sensor 199
- Power Connection 201
- Registration Assembly 202
- Screw location 202
- Alignment Tab 203
- Stabilizer 203
- Upper Delivery Assembly 204
- Delivery Roller 204
- Delivery Roller Removal 206
- Lower Delivery Rollers 206
- Laser Scanner Assembly 208
- Main Motor 209
- Toner Cartridge Guides 210
- Leading Tab 210
- Power Inlet Assembly 211
- Grounding Wire Screw 211
- A Locking Tabs 212
- B Auxiliary covers 212
- C Front cover 212
- A Self-tapping screws 213
- Tray Indicator Assembly 214
- A Left Corner Cover screw 214
- B Tray Indicator Assembly 214
- A Tray Indicator Limit Tab 215
- B Upper Limit Stop 215
- C Lower Limit Stop 215
- Paper Size Spring Assembly 216
- A Paper Size Spring Assembly 216
- D-Roller and Feed Roller 217
- Gear Assembly and PCA 218
- A Paper Size Switch PCA 218
- B Small, Self-tapping Screws 218
- C Machine Screws 218
- Power Connector 219
- Separation Roller 220
- A Separation Roller 220
- B Return Cover 220
- Troubleshooting 222
- Troubleshooting Process 223
- Troubleshooting Process Flow 225
- Preliminary Operating Checks 227
- Power On 228
- 7-8 Troubleshooting 229
- Table 7-3. No AC Power 229
- Cause Action 229
- Engine Test 230
- Engine Test Button Location 231
- Printing an Engine Test 231
- Event Log 233
- Figure 7-2 234
- Event Log Page 234
- Display the Event Log 235
- Print the Event Log 235
- Interpret the Event Log 235
- Printer Messages 237
- <number> 241
- PROTECT=AUTO 249
- HP LaserJet Printer Family 261
- Paper Specifications Guide 261
- Problem Action 262
- Paper Path Test 263
- Information Pages 264
- 7-44 Troubleshooting 265
- Figure 7-4 Menu Map 265
- Configuration Page 266
- 7-46 Troubleshooting 267
- Figure 7-5 Configuration Page 267
- Verify installed options 268
- Image Quality 269
- Image Defects 271
- 7-52 Troubleshooting 273
- Possible Cause Action 273
- 7-56 Troubleshooting 277
- Table 7-13. Character Voids 277
- 7-58 Troubleshooting 279
- Table 7-15. Curl 279
- 7-60 Troubleshooting 281
- Table 7-18. Dropouts 281
- HP LaserJet Printer 282
- 7-62 Troubleshooting 283
- 7-64 Troubleshooting 285
- 7-66 Troubleshooting 287
- Table 7-24. Loose Toner 287
- 7-68 Troubleshooting 289
- Table 7-26. Skew 289
- Table 7-27. Toner Smear 289
- Repetitive Defect Ruler 293
- Figure 7-6 294
- Interface Troubleshooting 297
- HP JetDirect 299
- Reference Diagrams 300
- 7-80 Troubleshooting 301
- Figure 7-10 302
- 250-sheet Paper Feeder 302
- 7-82 Troubleshooting 303
- Figure 7-11 Tray 2 Paper Path 303
- Figure 7-12 304
- 500-sheet Paper Feeder 304
- 7-84 Troubleshooting 305
- Figure 7-14 306
- 7-86 Troubleshooting 307
- Figure 7-15 Duplexing Unit 307
- Figure 7-16 308
- Sensors and Signals 309
- Figure 7-18 310
- 7-90 Troubleshooting 311
- Sensor Name 311
- 7-92 Troubleshooting 313
- 7-94 Troubleshooting 315
- Figure 7-21 Motors 315
- Figure 7-22 316
- Motors (Duplexing unit) 316
- 7-96 Troubleshooting 317
- Figure 7-23 Connectors 317
- Figure 7-24 318
- 7-98 Troubleshooting 319
- Figure 7-25 PCA’s 319
- Figure 7-26 320
- PCA (Duplexing Unit) 320
- 7-100 Troubleshooting 321
- Figure 7-28 322
- 7-102 Troubleshooting 323
- Figure 7-29 Switches 323
- Figure 7-30 324
- 7-104 Troubleshooting 325
- Figure 7-32 326
- 7-106 Troubleshooting 327
- Figure 7-33 328
- 7-108 Troubleshooting 329
- Figure 7-35 330
- 7-110 Troubleshooting 331
- Parts and Diagrams 332
- Ordering Parts 333
- Ordering Consumables 333
- Accessories and Supplies 335
- 8-6 Parts and Diagrams 337
- Description Part No 337
- Table 8-3. Replaceable Cables 337
- Illustrations and Parts Lists 338
- (English) 343
- Assembly 344
- 8-28 Parts and Diagrams 359
- 2 RB2-2037-000CN 1 Tray Cover 362
- 3 RH7-1356-000CN 1 Main Motor 364
- 1 RH2-5337-000CN 1 Flat Cable 367
- Table 8-22. 500-sheet Feeder 370
- Table 8-23. 500-sheet Feeder 372
- Alphabetical Parts List 373
- 8-44 Parts and Diagrams 375
- 8-46 Parts and Diagrams 377
- Numerical Parts List 378
- 8-48 Parts and Diagrams 379
- 8-50 Parts and Diagrams 381
- 8-52 Parts and Diagrams 383
- Index 4 387
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