HP LaserJet 6L User Manual Page 62
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- TROUBLESHOOTING
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Enhanced I/O
The Enhanced I/O feature allows printer memory to be used for storing data
received from the host computer. When Enhanced I/O is enabled, you can send
more data to your printer in shorter amounts of time, which allows you to return to
your application sooner. Enhanced I/O has the following options:
• Auto—allows the printer to use Enhanced I/O memory allocation to increase the
speed of data transfer from the host computer to the printer, if necessary.
• Off—uses the minimum amount of printer memory for storing data sent from the
host computer.
Enhanced I/O is only available in PCL mode. When using the host-based driver,
your PC handles memory management.
Page Protect
Page complexity (rules, complex graphics, or dense text) may exceed the printer’s
ability to create the page image fast enough to keep pace with the Image Formation
process. If Page Protect is disabled and a page is too complex, the page may print in
parts (for example, the top half on one page and the bottom half on the next page).
Some print data loss is likely in these instances, and the printer will display an error
message.
Page Protect allows the Formatter to create the entire page image in page buffer
memory before physically moving the paper through the printer. This process
ensures that the entire page will be printed. Page Protect applies only to PCL
printing. The default setting is Auto.
PJL Overview
Printer Job Language (PJL) is an integral part of configuration, in addition to the
standard Printer Command Language (PCL). With standard Centronics cabling, PJL
allows the printer to perform functions such as:
• Two-way communication with the host computer through a Bi-directional Parallel
connection. The printer can tell the host such things as the control panel status.
• Isolation of print environment settings from one print job to the next. For
example, if a print job is sent to the printer in landscape mode, the subsequent print
jobs print in landscape only if they are formatted for landscape printing.
5
Functional
Overview
Functional Overview 5 - 11
- 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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