HP LaserJet 6L User Manual Page 143
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Half-Self Test Functional Check
The electrophotographic process can be subdivided into the following stages:
• Cleaning (removing excess toner from drum surface)
• Conditioning (placing a uniform electrical charge on drum)
• Writing (laser strikes surface of drum to create latent image)
• Development (formation of the toner image on drum)
• Transfer (charge to transfer the image to paper)
• Fusing (heat and pressure to produce a permanent image)
The purpose of the Half-Self Test Check is to determine which process is
malfunctioning. Perform the test as follows:
1 Initiate a self test.
2 Open the Printer Door after the paper advances half-way through the printer (about
8 seconds after the 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.) Troubleshoot the failure as a
transfer or fusing problem.
If NO image is present on the photosensitive drum, perform the following functional
checks:
1 Make sure you have removed the entire length of the sealing tape from the toner
cartridge before you installed the cartridge.
2 Drum Rotation Functional Check.
3 High Voltage Power Supply Check.
7-22 Troubleshooting
- HP LaserJet 5L and 6L Printer 1
- Service Manual 1
- HP LaserJet 5L HP LaserJet 6L 2
- (C3941A) (C3990A) 2
- Conventions 4
- Chapter Descriptions 5
- List of Figures 6
- List of Tables 8
- Product Information 10
- 1-2 Product Information 11
- Printer Features 12
- Identification 13
- Product Information 1-5 14
- Specifications 15
- Product Overview 16
- 1-8 Product Information 17
- 19. Parallel Cable Connector 18
- • Parts Direct Ordering (PDO) 19
- • Parts Center Europe (PCE) 19
- Product Information 1-11 20
- Technical Assistance 21
- Worldwide Support 22
- Warranty 23
- Warranty Limitations 24
- Voltage Conversions 24
- 1-16 Product Information 25
- Site Requirements 26
- 2 -2 Site Requirements 27
- Printer Space Requirements 29
- Storage Conditions 30
- Toner Cartridge Distribution 31
- Figure 2-2 31
- Operating Overview 32
- 3-2 Operating Overview 33
- Using the Control Panel 34
- LED Lights 35
- Operating Overview 3-5 36
- The Front Panel Button 37
- Printing a Self-Test Page 38
- Figure 3-2 39
- Continuous Self Test 40
- Printing an Engine Test 41
- Resetting the Printer 42
- 3-12 Operating Overview 43
- Printer Maintenance 44
- 4-2 Printer Maintenance 45
- Printer Maintenance 4-3 46
- Toner Cartridge Life 47
- Refilled Toner Cartridges 48
- Recycling Toner Cartridges 48
- Cleaning the Printer 49
- Cleaning Printer Components 50
- Cleaning Spilled Toner 51
- Functional Overview 52
- 5 - 2 Functional Overview 53
- Basic Printer Functions 54
- DC Controller/Power System 55
- Print Engine Control System 56
- AC Power Distribution 57
- DC Power Distribution 57
- SleepMode 57
- • A job is received 58
- • Storing font information 59
- Control Panel 60
- Resolution Enhancement (REt) 60
- EconoMode 61
- Enhanced I/O 62
- Page Protect 62
- PJL Overview 62
- Image Formation System 63
- Toner Cartridge 64
- Step 1: Drum Cleaning 64
- Step 2: Drum Conditioning 64
- Step 3: Image Writing 64
- Step 4: Image Developing 65
- Step 5: Image Transferring 65
- Step 6: Image Fusing 65
- Paper Feed System 66
- 5 - 16 Functional Overview 67
- Functional Overview 5 - 17 68
- Paper Jam Detection 69
- Basic Sequence of Operation 70
- 5 - 20 Functional Overview 71
- Functional Overview 5 - 21 72
- 5 - 22 Functional Overview 73
- Removal and Replacement 74
- 6 - 2 Removal and Replacement 75
- WARNING! 76
- • 5.5 mm hexhead nutdriver 77
- • small flathead screwdriver 77
- • needlenose pliers 77
- 2 Remove the toner cartridge 79
- 2 Open the EP door 81
- 3 Remove the toner cartridge 81
- Figure 6-6 83
- 4 Lift the Control Panel out 84
- 1 Remove Printer Covers 85
- 4 Lift the roller out 85
- Delivery Assembly 86
- Figure 6-10 87
- Fuser Pressure Plate 88
- To reinstall: 89
- Heating Element 90
- Figure 6-14 91
- Pressure Roller 93
- Face-Up/Face-Down Lever 94
- Fuser Exit Roller Assembly 95
- Paper Exit Sensor Flag 96
- 6 Lift the Solenoid off 99
- 1 Remove the Printer Covers 100
- 5 Lift the bushing out 101
- To reinstall 102
- Paper Feed Frame 103
- Replacement 104
- Figure 6-27 104
- Removal and 104
- 6-28, callout 1) 105
- Kick Plate 108
- Separation Pad 110
- Subpad Removal 111
- Figure 6-34 111
- Feed Assembly 112
- 5 Remove the Feed Assembly 113
- 2 Remove any extra memory 115
- Motor Removal 116
- Figure 6-39 116
- DC Controller 117
- ESD SENSITIVE! 118
- Figure 6-42 119
- Formatter PCA 120
- Troubleshooting 122
- 7-2 Troubleshooting 123
- Paper Path and Components 126
- DC Controller Diagram 127
- Printer Error Troubleshooting 128
- Printer Status Messages 129
- Table 7-3 Unclearable Error 130
- Service and Error Messages 131
- Troubleshooting 7-11 132
- 7-12 Troubleshooting 133
- Check the Toner Cartridge 134
- Image Defect Examples 135
- Troubleshooting Checks 142
- • Charging (1) 145
- • Drum Ground (2) 145
- • Developing Roller (3) 145
- Paper Curl 147
- Troubleshooting Tools 148
- Repetitive Image Defect Ruler 149
- Main Wiring Diagram 150
- 7-30 Troubleshooting 151
- Troubleshooting 7-31 152
- 7-32 Troubleshooting 153
- Parts and Diagrams 154
- 8-2 Parts and Diagrams 155
- Ordering Parts 156
- Ordering Consumables 157
- Accessories and Supplies 158
- Common Hardware 159
- Parts and Diagrams 8-7 160
- 8-8 Parts and Diagrams 161
- Parts and Diagrams 8-9 162
- 8-10 Parts and Diagrams 163
- Parts and Diagrams 8-11 164
- 8-12 Parts and Diagrams 165
- Parts and Diagrams 8-13 166
- 8-14 Parts and Diagrams 167
- Parts and Diagrams 8-15 168
- 8-16 Parts and Diagrams 169
- Parts and Diagrams 8-17 170
- 8-18 Parts and Diagrams 171
- Parts and Diagrams 8-19 172
- 8-20 Parts and Diagrams 173
- Parts and Diagrams 8-21 174
- 8-22 Parts and Diagrams 175
- Parts and Diagrams 8-23 176
- 8-24 Parts and Diagrams 177
- Parts and Diagrams 8-25 178
- 8-26 Parts and Diagrams 179
- Parts Index 180
- Parts Index A-3 182
- A-4 Parts Index 183
- Parts Index A-5 184
- A-6 Parts Index 185
- Parts Index A-7 186
- A-8 Parts Index 187
- Parts Index A-9 188
- A-10 Parts Index 189
- Parts Index A-11 190
- A-12 Parts Index 191
- Regulatory Information 192
- Laser Statement (Finland) 193
- Toner Safety 194
- Ozone Emission 194
- VCCI Statement (Japan) 195
- FCC Statement (Class B) 195
- Service Notes 196
- C-2 Service Notes 197
- SERVICE NOTE 198
- C-4 Service Notes 199
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